WO2024098241A1 - 电化学装置、用电设备及电化学装置的制备方法 - Google Patents

电化学装置、用电设备及电化学装置的制备方法 Download PDF

Info

Publication number
WO2024098241A1
WO2024098241A1 PCT/CN2022/130553 CN2022130553W WO2024098241A1 WO 2024098241 A1 WO2024098241 A1 WO 2024098241A1 CN 2022130553 W CN2022130553 W CN 2022130553W WO 2024098241 A1 WO2024098241 A1 WO 2024098241A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
fixing member
cell group
electrode terminal
along
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/130553
Other languages
English (en)
French (fr)
Inventor
农文彬
李坤龙
王鹏飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Ampack Technology Ltd
Original Assignee
Xiamen Ampack Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiamen Ampack Technology Ltd filed Critical Xiamen Ampack Technology Ltd
Priority to JP2025525732A priority Critical patent/JP2025539241A/ja
Priority to CN202280017707.6A priority patent/CN116941077A/zh
Priority to PCT/CN2022/130553 priority patent/WO2024098241A1/zh
Priority to EP22964717.7A priority patent/EP4614630A4/en
Publication of WO2024098241A1 publication Critical patent/WO2024098241A1/zh
Priority to US19/202,202 priority patent/US20250273793A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/502Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/502Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514Methods for interconnecting adjacent batteries or cells
    • H01M50/516Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/547Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/552Terminals characterised by their shape
    • H01M50/553Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557Plate-shaped terminals
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the embodiments of the present application relate to the field of electrochemical technology, and in particular, to an electrochemical device, electrical equipment, and a method for preparing the electrochemical device.
  • Electrode terminals are usually connected through electrode terminals in electrochemical devices.
  • the connection between the electrode terminals may be deformed by force, affecting the use of the electrochemical devices.
  • the embodiments of the present application provide an electrochemical device, an electrical equipment and a method for preparing the electrochemical device to improve the above problems.
  • an electrochemical device comprising: N battery cells, M first fixing members, M second fixing members and M-1 conductive members, wherein N and M are both positive integers and 2 ⁇ M ⁇ N; the N battery cells are divided into M battery cell groups, each battery cell group comprises at least one battery cell, the battery cells in the battery cell groups are arranged along a first direction, and the M battery cell groups are arranged along the first direction; the battery cell comprises a battery cell housing and two electrode terminals, the two electrode terminals are arranged oppositely on both sides of the battery cell housing along a second direction, wherein the second direction is the direction in which the first fixing member and the second fixing member are arranged oppositely.
  • the first direction is perpendicular to the first direction; along the first direction, the electrode terminals of two adjacent battery cell groups are connected by a conductive member, and a connection area is formed on the conductive member; along the second direction, the battery cell group includes a first side and a second side that are oppositely arranged, wherein the first fixing member is bonded to at least a portion of the electrode terminals on the first side of the battery cell group, and at least one first fixing member is bonded to at least a portion of the connection area, and/or the second fixing member is bonded to at least a portion of the electrode terminals on the second side of the battery cell group, and at least one second fixing member is bonded to at least a portion of the connection area.
  • the first fixing member is bonded to at least a portion of the electrode terminal on the first side of the battery cell group, and at least one first fixing member is bonded to at least a portion of the connection area, which is beneficial to protecting the electrode terminal and the conductive member, and providing protection for the connection area, thereby improving the stability of the electrochemical device.
  • the second fixing member is bonded to at least a portion of the electrode terminal on the second side of the battery cell group, and at least one second fixing member is bonded to at least a portion of the connection area, which is beneficial to improving the protection of the electrode terminal and the conductive member, and the protection of the connection area formed on the electrode terminal and the conductive member, thereby improving the stability of the electrochemical device.
  • At least one battery cell group includes a plurality of battery cells, and on a first side of the battery cell group, the electrode terminals of each of the plurality of battery cells are connected to each other; and/or at least one battery cell group includes a plurality of battery cells, and on a second side of the battery cell group, the electrode terminals of each of the plurality of battery cells are connected to each other.
  • a battery cell group includes a plurality of battery cells, it is advantageous to form a series connection or a parallel connection between adjacent battery cell groups.
  • At least one battery cell group includes a plurality of battery cells, and at least one electrode terminal of each of the plurality of battery cells is connected to each other by welding on a first side of the battery cell group; and/or at least one battery cell group includes a plurality of battery cells, and at least one electrode terminal of each of the plurality of battery cells is connected to each other by welding on a second side of the battery cell group. This is beneficial to improving the stability of the interconnection of the plurality of battery cells.
  • At least one battery cell group includes a plurality of battery cells, and at least one electrode terminal of at least one of the plurality of battery cells is bent on a first side of the battery cell group; and/or at least one battery cell group includes a plurality of battery cells, and at least one electrode terminal of at least one of the plurality of battery cells is bent on a second side of the battery cell group. This is beneficial to improving the space utilization when the plurality of battery cells are connected to each other.
  • the electrochemical device further comprises an elastic member, the elastic member is disposed between two adjacent battery cell groups, and the elastic member contacts at least one of the two battery cell groups.
  • the elastic member is conducive to providing deformation space for the expanded battery cell.
  • the thickness of the elastic member when not compressed by the battery cell is T1
  • the spacing formed in the first direction between two adjacent battery cell groups along the first direction is T2
  • the thickness of the battery cell when not undergoing a charge-discharge cycle is T3
  • half of the sum of the number of battery cells in two adjacent battery cell groups along the first direction is X
  • T1, T2, T3, and X satisfy: T2-X*T3*20% ⁇ T1 ⁇ T2.
  • the elastic member is conducive to providing deformation space and support when the battery cell expands, which is conducive to reducing the risk of battery cell damage and increasing the service life of the electrochemical device.
  • the first fixing member includes a first sleeve, and along the first direction, the wall thickness of the first sleeve is greater than or equal to 1 mm and less than or equal to 5 mm; and/or the second fixing member includes a second sleeve, and along the first direction, the wall thickness of the second sleeve is greater than or equal to 1 mm and less than or equal to 5 mm. This is conducive to improving the protection effect of the electrode terminal.
  • the first fixing member of one battery cell group is connected to the second fixing member of the other battery cell group, and the first fixing member and the second fixing member form a gap in the first direction.
  • a gap is also formed between the two adjacent battery cell groups, which is conducive to improving the heat dissipation of the battery cell groups, and further improving the heat dissipation of the electrochemical device.
  • one of the first fixing member and the second fixing member is provided with a convex portion, and the first fixing member and the second fixing member form a distance through the convex portion.
  • the other of the first fixing member and the second fixing member is provided with a recess
  • the length of the protrusion along the first direction is greater than the length of the recess along the first direction
  • the first fixing member and the second fixing member form a spacing through the cooperation of the protrusion and the recess.
  • the length of the convex portion is greater than the length of the concave portion.
  • the convex portion cooperates with the concave portion to form a gap between the first fixing member and the second fixing member, and a gap is also formed between adjacent battery cell groups, which is beneficial to improving the heat dissipation of the battery cell group and further improving the heat dissipation of the electrochemical device.
  • the battery cell also includes an electrode assembly, which is disposed in a battery cell shell, and two electrode terminals are connected to the electrode assembly and extend out of the battery cell shell; in the same battery cell group, along a first direction, a projection of the first fixing member is separated from a projection of the electrode assembly of the battery cell in the battery cell group; and/or, in the same battery cell group, along the first direction, a projection of the second fixing member is separated from a projection of the electrode assembly of the battery cell in the battery cell group.
  • the projections of the first fixing member and the second fixing member are separated from the projection of the electrode assembly, which is beneficial to reduce the impact on the expansion of the electrode assembly and increase the service life of the electrochemical device.
  • At least one first fixing member is formed on the first side of the battery cell group and at least part of the connection area by injection molding; and/or at least one second fixing member is formed on the second side of the battery cell group and at least part of the connection area by injection molding. This is beneficial to improve the protection of the connection area formed on the electrode terminal and the conductive member.
  • the first fixing member covers the portion of the electrode terminal outside the battery cell housing and at least a portion of the battery cell housing; and/or the second fixing member covers the portion of the electrode terminal outside the battery cell housing and at least a portion of the battery cell housing. This is beneficial to improving the protection of the electrode terminal and the battery cell.
  • the first fixing member is provided with at least one first through hole, the first through hole penetrates the first fixing member along a third direction; and/or the second fixing member is provided with at least one first through hole, the first through hole penetrates the second fixing member along a third direction, wherein the third direction is perpendicular to the first direction and the second direction.
  • the electrochemical device further includes a shell; the shell includes a third wall and a fourth wall that are relatively arranged along the third direction; a second through hole is opened on the third wall and/or the fourth wall, and the second through hole is connected to the first through hole.
  • an electrochemical device including: N battery cells, A first fixing members, A second fixing members, (L-1)*A third fixing members, wherein N, M, and L are all positive integers and 2 ⁇ M ⁇ N, L ⁇ 2; the N battery cells are divided into M battery cell groups, and the M battery cell groups are divided into A rows and L columns, and along the second direction, the battery cell groups include a first side and a second side that are relatively arranged; each of the battery cell groups includes at least one battery cell, and the battery cells in the battery cell group are arranged along the first direction, and the second direction is perpendicular to the first direction; the battery cell includes a battery cell shell and two electrode terminals, and the two electrode terminals are relatively arranged on both sides of the battery cell shell along the second direction; wherein, in one In a row of cell groups, the first fixing member is located on a first side of a first cell group in the row, and is bonded to at least a portion of an electrode terminal on the first side of
  • the first fixing member, the second fixing member and the third fixing member are beneficial to strengthening the protection of each electrode terminal of the battery cell group and improving the stability and service life of the electrochemical device.
  • the A-row battery cell groups are stacked along the first direction; the electrochemical device further comprises A-1 conductive members; in two adjacent rows of battery cell groups, the electrode terminal on the first side of the first battery cell group in one row is connected to the electrode terminal on the second side of the first battery cell group in the other row through the conductive member, and a connection area is formed on the conductive member, at least one of the first fixing members is bonded to at least part of the connection area, and/or at least one of the second fixing members is bonded to at least part of the connection area.
  • This is beneficial to enhance the protection of the electrode terminal and the connection area formed on the conductive member, and improve the stability of the electrochemical device.
  • the electrode terminal on the second side of one cell group is connected to the electrode terminal on the first side of the other cell group by welding, which is beneficial to improving the stability of the connection between adjacent cell groups.
  • At least one battery cell group includes a plurality of battery cells, and on a first side of the battery cell group, an electrode terminal of at least one of the plurality of battery cells is bent; and/or at least one battery cell group includes a plurality of battery cells, and on a second side of the battery cell group, an electrode terminal of at least one of the plurality of battery cells is bent. This is beneficial to improving the space utilization when the plurality of battery cells are connected to each other.
  • the electrochemical device further comprises an elastic member, wherein the elastic member is disposed between two adjacent battery cell groups in the same column of battery cell groups, and the elastic member contacts at least one of the two battery cell groups.
  • the elastic member is conducive to providing deformation space for the expanded battery cell.
  • the thickness of the elastic member when not compressed by the battery cell is T1
  • the spacing formed in the first direction between two adjacent battery cell groups in the same column of battery cell groups is T2
  • the thickness of the battery cell when not undergoing a charge and discharge cycle is T3
  • half of the sum of the number of battery cells in two adjacent battery cell groups in the same column of battery cell groups is X
  • T1, T2, T3, and X satisfy: T2-X*T3*20% ⁇ T1 ⁇ T2.
  • the elastic member is conducive to providing deformation space and support when the battery cell expands, which is conducive to reducing the risk of battery cell damage and increasing the service life of the electrochemical device.
  • the first fixing member includes a first sleeve, and along the first direction, the wall thickness of the first sleeve is greater than or equal to 1mm and less than or equal to 5mm; and/or, the second fixing member includes a second sleeve, and along the first direction, the wall thickness of the second sleeve is greater than or equal to 1mm and less than or equal to 5mm; and/or, the third fixing member includes a third sleeve and a fourth sleeve, and along the first direction, the wall thickness of the third sleeve is greater than or equal to 1mm and less than or equal to 5mm, and the wall thickness of the fourth sleeve is greater than or equal to 1mm and less than or equal to 5mm. This is conducive to improving the protection effect of the electrode terminal.
  • At least one first fixing member is formed by injection molding on the first side of the first cell group in the row and at least part of the connection area; and/or, at least one second fixing member is formed by injection molding on the second side of the last cell group in the row and at least part of the connection area; and/or, for two adjacent cell groups in a row, at least one third fixing member is formed by injection molding on the second side of one cell group and the first side of another cell group.
  • the first fixing member covers the portion of the electrode terminal outside the battery cell housing and at least a portion of the battery cell housing; and/or, the second fixing member covers the portion of the electrode terminal outside the battery cell housing and at least a portion of the battery cell housing; and/or, the third fixing member covers the portion of the electrode terminal outside the battery cell housing and at least a portion of the battery cell housing. This is beneficial to improving the protection of the electrode terminal and the battery cell.
  • the first fixing member is provided with at least one first through hole, which penetrates the first fixing member along a third direction; and/or, the second fixing member is provided with at least one first through hole, which penetrates the second fixing member along a third direction; and/or, the third fixing member is provided with at least one first through hole, which penetrates the third fixing member along a third direction; wherein the third direction is perpendicular to the first direction and the second direction.
  • the first fixing member in one battery cell group is connected to the second fixing member in the other battery cell group, and the first fixing member and the second fixing member form a gap in the first direction; and/or, along the first direction, in two adjacent battery cell groups, the third fixing member in one battery cell group is connected to the third fixing member in the other battery cell group, and the two third fixing members form a gap in the first direction.
  • the battery cell further includes an electrode assembly, the electrode assembly is disposed in the battery cell housing, and two electrode terminals are connected to the electrode assembly and extend out of the battery cell housing; in the same battery cell group, along the first direction, the projection of the first fixing member is separated from the projection of the electrode assembly of the battery cell in the battery cell group; and/or, in the same battery cell group, along the first direction, the projection of the second fixing member is separated from the projection of the electrode assembly of the battery cell in the battery cell group; and/or, in the same row of battery cell groups, along the first direction, the projection of the third fixing member between two adjacent battery cell groups is separated from the projection of the electrode assembly of the battery cells in the two battery cell groups.
  • This is beneficial to reduce the impact on the expansion of the electrode assembly and improve the service life of the electrochemical device.
  • the electrochemical device further comprises a housing, the housing comprising a third wall and a fourth wall arranged opposite to each other along a third direction; a second through hole is provided on the third wall and/or the fourth wall, and the second through hole is connected to the first through hole.
  • an electrical device comprising: an electrochemical device as described in any one of the first aspect or the second aspect.
  • a preparation method of an electrochemical device comprising: step S101: connecting the electrode terminals of two adjacent battery cell groups of M battery cell groups through a conductive member, and forming a connection area on the conductive member; step S102: arranging a flowable insulating material on a first side of the battery cell group and the conductive member, and after the insulating material is solidified, bonding the connection area close to the first side of the battery cell group, the portion of the electrode terminal located outside the battery cell shell, and at least a portion of the battery cell shell to form a first fixing member; step S103: arranging a flowable insulating material on a second side of the battery cell group and the conductive member, and after the insulating material is solidified, bonding the connection area close to the second side of the battery cell group, the portion of the electrode terminal located outside the battery cell shell, and at least a portion of the battery cell shell to form a second fixing member.
  • a preparation method of an electrochemical device comprising: step S201: connecting electrode terminals of two adjacent battery cell groups in the same row of battery cell groups, arranging a flowable insulating material on a first side and a second side of the two adjacent battery cell groups, and after the insulating material is cured, bonding the portion of the electrode terminal located outside the battery cell shell and at least a portion of the battery cell shell to form a third fixing member; step S202: arranging the flowable insulating material on the first side of the first battery cell group in the row of battery cell groups, and after the insulating material is cured, bonding the portion of the electrode terminal located outside the battery cell shell and at least a portion of the battery cell shell to form a first fixing member; step S203: arranging the flowable insulating material on the second side of the last battery cell group in the row of battery cell groups, and after the insulating material is cured, bonding the portion of the electrode terminal
  • the method also includes: step S204: providing M-1 conductive members, connecting the electrode terminals on the first side of the first cell group in one of two adjacent rows of cell groups with the electrode terminals on the second side of the first cell group in the other row of cell groups through the conductive members, and forming a connection area on the conductive members; step S205: arranging a flowable insulating material on the first side of the cell group and the conductive member, and after the insulating material is cured, bonding the connection area close to the first side of the cell group; step S206: arranging a flowable insulating material on the second side of the cell group and the conductive member, and after the insulating material is cured, bonding the connection area close to the second side of the cell group.
  • the first fixing member is bonded to at least part of the electrode terminal on the first side of the battery cell group, and at least one first fixing member is bonded to at least part of the connection area formed by the electrode terminal and the conductive member; and/or, the second fixing member is bonded to at least part of the electrode terminal on the second side of the battery cell group, and at least one second fixing member is bonded to at least part of the connection area formed by the electrode terminal and the conductive member.
  • Each first fixing member and each second fixing member are conducive to protecting the electrode terminal of the battery cell, and are conducive to protecting the connection area formed by the electrode terminal and the conductive member, thereby improving the stability and service life of the electrochemical device.
  • the electrode terminals of two adjacent battery cell groups are connected, the third fixing member is bonded to at least a portion of the electrode terminal on the second side of one of the two adjacent battery cell groups, and the third fixing member is bonded to at least a portion of the electrode terminal on the first side of the other of the two adjacent battery cell groups.
  • the first fixing member is bonded to at least a portion of the connection area formed by the electrode terminal and the conductive member, and/or the second fixing member is bonded to at least a portion of the connection area formed by the electrode terminal and the conductive member.
  • Each first fixing member, each second fixing member, and each third fixing member are conducive to protecting the electrode terminal of the battery cell, and are conducive to protecting the connection area formed by the electrode terminal and the conductive member, thereby improving the stability and service life of the electrochemical device.
  • FIG. 1 shows a schematic diagram of an optional electrochemical device of the present application.
  • FIG. 2 shows a schematic diagram of an optional arrangement of cells of an electrochemical device of the present application.
  • FIG. 3 shows a schematic diagram of another optional arrangement of cells of an electrochemical device of the present application.
  • FIG. 4 is a schematic diagram showing a connection method of electrode terminals of each battery cell of a battery cell group of the present application.
  • FIG5 shows a schematic diagram of an optional structure of a battery cell of the present application.
  • FIG. 6 shows a schematic diagram of an optional structure of a first fixing member of the present application.
  • FIG. 7 shows a schematic diagram of an optional structure of a second fixing member of the present application.
  • FIG. 8 is an enlarged schematic diagram of Q1 in FIG. 2 .
  • FIG9 is a schematic diagram showing that the length of the third structure member along the first direction of the present application is smaller than the length of the fourth structure member along the first direction.
  • FIG. 10 is a schematic diagram showing that the length of the third structure member along the first direction of the present application is greater than the length of the fourth structure member along the first direction.
  • FIG. 11 is an enlarged schematic diagram showing a cross section at Q2 in FIG. 8 .
  • FIG. 12 shows an optional schematic structural diagram of the third wall of the electrochemical device in FIG. 1 .
  • FIG. 13 shows an optional structural schematic diagram of the electrochemical device in FIG. 1 after the fourth wall is removed.
  • FIG. 14 shows a schematic diagram of yet another optional electrochemical device in the present application.
  • FIG. 15 shows a schematic diagram of another optional arrangement of cells of an electrochemical device in the present application.
  • FIG. 16 shows a schematic diagram of another optional arrangement of cells in an electrochemical device in the present application.
  • FIG. 17 is a schematic diagram showing a connection between the second electrode terminal and the first electrode terminal of the present application.
  • FIG. 18 shows another schematic diagram of the connection between the second electrode terminal and the first electrode terminal of the present application.
  • FIG. 19 is an enlarged schematic diagram of Q4 in FIG. 17 .
  • FIG. 20 is a schematic diagram showing the position between the third fixing member and the electrode terminal of the present application.
  • FIG. 21 shows a schematic diagram of an optional structure of a third fixing member of the present application.
  • FIG. 22 shows an enlarged schematic diagram of Q3 in FIG. 15 .
  • FIG. 23 is an enlarged schematic diagram of a cross section at Q5 of FIG. 22 .
  • FIG. 24 shows an optional schematic structural diagram of the third wall of the electrochemical device in FIG. 14 .
  • FIG. 25 shows an optional structural schematic diagram of the electrochemical device in FIG. 14 after the fourth wall is removed.
  • FIG26 shows a schematic diagram of the structure of an optional electrical device of the present application.
  • FIG. 27 shows an optional flow chart of the method for preparing an electrochemical device provided in the first aspect of the present application.
  • FIG. 28 shows an optional flow chart of a method for preparing an electrochemical device provided in the second aspect of the present application.
  • FIG. 29 shows an optional flow chart of a method for preparing an electrochemical device provided in the second aspect of the present application.
  • 100 electrochemical device; 200, electrical equipment; 10, battery cell group; 101, first side of battery cell group; 102, second side of battery cell group; 1, battery cell; 11, battery cell shell; 12, electrode terminal; 1201, first section; 1202, second section; 13, electrode assembly; 21, first fixing member; 210, first sleeve; 211, first side of first fixing member; 212, second side of first fixing member; 22, second fixing member; 220, second sleeve; 221, first side of second fixing member; 222, second side of second fixing member; 23, third fixing member; 231, third sleeve; 2311, first side of third sleeve; 2312, second side of third sleeve; 232, fourth sleeve; 2321, fourth sleeve 23, the first side of the fourth sleeve; 2322, the second side of the fourth sleeve; 24, the conductive member; 25, the connection area between the electrode terminal and the conductive member; 26, the distance between the first fixing member and the second fixing member; 27, the positive
  • an electrochemical device 100 which includes: N battery cells 1, M first fixing members 21, M second fixing members 22, and M-1 conductive members 24, wherein N and M are both positive integers and 2 ⁇ M ⁇ N; the N battery cells 1 are divided into M battery cell groups 10, each battery cell group 10 includes at least one battery cell 1, and the battery cells 1 in the battery cell group 10 are arranged along the first direction F1, and the M battery cell groups 10 are arranged along the first direction F1.
  • Each battery cell 1 includes a battery cell housing 11 and two electrode terminals 12, and the two electrode terminals 12 are arranged on both sides of the battery cell housing 11 along the second direction F2, wherein the second direction F2 is the direction in which the first fixing member 21 and the second fixing member 22 in a battery cell group 10 are arranged relatively, and the second direction F2 is perpendicular to the first direction F1.
  • the electrode terminals 12 of two adjacent battery cell groups 10 are connected by the conductive member 24, and a connection area 25 is formed on the conductive member 24.
  • the cell group 10 includes a first side 101 and a second side 102 that are arranged opposite to each other, wherein the first fixing member 21 is bonded to at least a portion of the electrode terminal 12 on the first side 101 of the cell group, and the first fixing member 21 is bonded to at least a portion of the connection area 25 near the first side 101 of the cell group.
  • the first fixing member 21 is conducive to providing protection for the electrode terminal 12 of the cell 1, and is conducive to providing protection for the electrode terminal and the connection area 25 formed on the conductive member.
  • the second fixing member 22 is bonded to at least a portion of the electrode terminal 12 on the second side 102 of the cell group, and the second fixing member 22 is bonded to at least a portion of the connection area 25 near the second side 102 of the cell group.
  • the second fixing member 22 is conducive to providing protection for the electrode terminal 12 of the cell 1, and is conducive to providing protection for the electrode terminal and the connection area 25 formed on the conductive member.
  • each battery cell includes an electrode assembly 13, a battery cell shell 11 and an electrode terminal 12, the electrode assembly 13 is disposed in the battery cell shell 11, and the electrode terminal 12 is connected to the electrode assembly 13 and extends out of the battery cell shell 11.
  • the electrode terminal 12 includes two, one of which is a positive electrode terminal and the other is a negative electrode terminal.
  • the positive electrode terminal and the negative electrode terminal are disposed at the same end of the battery cell shell 11.
  • the positive electrode terminal and the negative electrode terminal are disposed at opposite ends of the battery cell shell 11. This specification takes the example of the positive electrode terminal and the negative electrode terminal being disposed at opposite ends of the battery cell shell 11.
  • the electrode terminal 12 includes a first section 1201 located inside the cell casing 11 and a second section 1202 located outside the cell casing 11 .
  • the first section 1201 is connected to the electrode assembly 13 .
  • the electrode assembly 13 may include a positive electrode sheet, a negative electrode sheet, and a separator, wherein the separator is located between the positive electrode sheet and the negative electrode sheet.
  • the electrode assembly 13 may be formed by winding the positive electrode sheet, the separator, and the negative electrode sheet, or by stacking the positive electrode sheet, the separator, and the negative electrode sheet.
  • the relevant contents of the positive electrode sheet, the separator, and the negative electrode sheet may refer to the relevant technology, and no limitation is made in this application.
  • the positive electrode sheet may include a positive active material layer and a positive current collector, wherein the positive active material layer is disposed on the positive current collector, for example, the positive active material layer may be coated on the positive current collector, and there is a blank foil area at the edge of the positive current collector, and the electrode terminal 12 is connected to the blank foil area, for example, the electrode terminal 12 may be used as a positive electrode terminal or an electrode terminal for sampling.
  • the negative electrode plate may include a negative electrode active material layer and a negative electrode current collector, wherein the negative electrode active material layer is disposed on the negative electrode current collector, for example, the negative electrode active material layer may be coated on the negative electrode current collector, and there is a blank foil area at the edge of the negative electrode current collector, and the electrode terminal 12 is electrically connected to the blank foil area, for example, the electrode terminal 12 may be used as a negative electrode terminal or an electrode terminal for sampling.
  • the projection of the first fixing member 21 is separated from the projection of the electrode assembly 13 of the battery cell 1 in the battery cell group 10 , which helps to reduce the influence of the first fixing member 21 on the expansion of the electrode assembly 13 .
  • the projection of the second fixing member 22 is separated from the projection of the electrode assembly 13 of the battery cell 1 in the battery cell group 10 , which helps to reduce the influence of the second fixing member 22 on the expansion of the electrode assembly 13 .
  • the electrochemical device 100 provided in the first aspect of the embodiments of the present application is described in detail below. It should be understood that the contents described below are not intended to limit the embodiments of the present application in any way.
  • the electrochemical device 100 provided in the first aspect of the present application may be a secondary battery, and its type may be but is not limited to a lithium ion battery, a sodium ion battery, a lead storage battery, and the like.
  • the number of battery cell groups 10 of the electrochemical device 100 is M ⁇ 2, and the number of battery cells 1 in each battery cell group 10 is greater than 1. It can be understood with reference to Figure 2, wherein the battery cells 1 in each battery cell group 10 are stacked in sequence along the first direction F1, and M battery cell groups 10 are arranged in sequence along the first direction F1. The rest of the cases can be deduced by analogy and will not be repeated here.
  • the number of conductive members 24 is M-1.
  • each battery cell group 10 includes 2 battery cells 1, and there are 7 conductive members 24 in total (i.e., M-1).
  • M 8
  • M first fixing members 21 may be respectively located on the first side 101 of the M battery cell groups 10, and bonded to at least a portion of the electrode terminal 12 on the first side 101 of each battery cell group 10, and one first fixing member 21 may be located on the first side 101 of one battery cell group 10.
  • M second fixing members 22 may be respectively located on the second side 102 of the M battery cell groups 10, and bonded to at least a portion of the electrode terminal 12 on the second side 102 of each battery cell group 10, and one second fixing member 22 may be located on the second side 102 of one battery cell group 10.
  • the first fixing member 21 covers the second section 1202 of each electrode terminal 12 to enhance protection of the electrode terminal 11 .
  • the second fixing member 22 covers the second section 1202 of each electrode terminal 12 to enhance protection of the electrode terminal 11 .
  • the first fixing member 21 covers at least a portion of the battery cell housing to enhance protection of the battery cell housing.
  • the second fixing member 22 covers at least a portion of the battery cell housing to enhance protection of the battery cell housing.
  • the electrode terminals 12 and the conductive members 24 of two adjacent battery cell groups 10 are connected by welding, and a connection area is formed on the conductive member 24 .
  • the welding method is not limited here, such as laser welding, ultrasonic welding.
  • the electrode terminals 12 of two adjacent battery cell groups 10 are connected and then connected through other conductive members and the conductive member 24 by welding.
  • the electrode terminals 12 and the conductive member 24 of the two battery cell groups 10 are connected by conductive glue, that is, at least one electrode terminal 12 of each of the two battery cell groups 10 is respectively glued to the conductive member 24 by conductive glue, so as to be connected through the conductive member 24 and form a connection area 25 on the conductive member 24.
  • the electrode terminals 12 and the conductive members 24 of the two battery cell groups 10 are connected by a mechanical structure, one of the electrode terminal 12 and the conductive member 24 is provided with a recess, and the other is provided with a protrusion, the recess and the protrusion are connected, and a connection area 25 is formed on the conductive member 24.
  • one of the two electrode terminals 12 of the battery cell 1 is a positive electrode terminal, and the other is a negative electrode terminal.
  • the N battery cells 1 of the electrochemical device 100 in the present application are connected in series or in parallel with each other, and ultimately the positive electrode terminal of at least one battery cell 1 forms the positive electrode of the electrochemical device 100, and the negative electrode terminal of at least one battery cell 1 forms the negative electrode of the electrochemical device 100.
  • the number of electrode terminals 12 of the battery cell 1 is greater than two, and at least one electrode terminal 12 can be used to sample physical parameters (voltage, current, etc.) of the battery cell, for example, it can be electrically connected to a battery management system.
  • the first fixing member 21 is disposed on the first side 101 of the cell group 10 and the conductive member 24 by means of an injection molding process or a potting process, so as to be bonded to the connection area 25 near the first side 101 of the cell group 10, the second section 1202 of the electrode terminal 11, and at least a portion of the cell casing 11, thereby improving the protection of the connection area 25 formed on the electrode terminal 12 and the conductive member 24.
  • the second fixing member 22 is disposed on the second side 102 of the cell group 10 and the conductive member 24 by means of an injection molding process or a potting process, so as to be bonded to the connection area 25 near the second side 102 of the cell group 10, the second section 1202 of the electrode terminal 11, and at least a portion of the cell casing 11, thereby improving the protection of the connection area 25 formed on the electrode terminal 12 and the conductive member 24.
  • injection molding can melt the insulating material through an injection molding device, so that the melted insulating material covers the battery cell group 10 and the conductive member 24, and the insulating material is solidified to form the first fixing member 21 or the second fixing member 22 to form a bond.
  • the injection molding process of the first fixing member 21 includes: firstly connecting at least one electrode terminal 12 of two battery cell groups 10 adjacent to each other along the first direction F1 through the conductive member 24, for example, by welding the electrode terminals 12 of the two battery cell groups 10 to the conductive member 24 to form a connection, and then performing injection molding on the first side 101 of the battery cell group 10 and the conductive member 24, the connection area 25 formed on the electrode terminal 12 and the conductive member 24, the second section 1202 of the electrode terminal 12, and at least a portion of the battery cell shell 11 are coated with insulating material, and the insulating material is solidified to form the first fixing member 21, thereby making the structure of the injection-molded first fixing member 21 more stable, which is beneficial to improving the protection effect.
  • the injection molding process of the second fixing member 22 includes: firstly connecting at least one electrode terminal 12 of two battery cell groups 10 adjacent to each other along the first direction F1 through the conductive member 24, for example, by welding the electrode terminals 12 of the two battery cell groups 10 to the conductive member 24 to form a connection, and then performing injection molding on the second side 102 of the battery cell group 10 and the conductive member 24, the connection area 25 formed on the electrode terminal 12 and the conductive member 24, the second section 1202 of the electrode terminal 12, and at least a portion of the battery cell shell 11 are coated with insulating material, and the second fixing member 22 is formed after the insulating material is cured, thereby making the structure of the injection-molded second fixing member 22 more stable, which is beneficial to improving the protection effect.
  • the insulating material (eg, flowable insulating material) may be used to cover the battery cell group 10 and the conductive member 24 by a pouring process, and the insulating material may be solidified to form the first fixing member 21 or the second fixing member 22 to form a bond.
  • the insulating material includes a potting glue.
  • each first fixing member 21 may be the same or different, which is not limited here.
  • the shape and structure of each second fixing member 22 may be the same or different, which is not limited here.
  • each battery cell group 10 may include at least one battery cell 1, but the specific number of battery cells 1 in each battery cell group 10 is not limited here. For example, the number of battery cells 1 in each battery cell group 10 may be equal; or, the number of battery cells 1 in each battery cell group 10 may be unequal; or, the number of battery cells 1 in some battery cell groups 10 may be equal.
  • a battery cell group 10 includes multiple battery cells 1
  • the electrode terminals 12 of the battery cells 1 in the battery cell group 10 can be connected (for example, by welding), and then the connected electrode terminals 12 of the battery cell groups 10 can be connected in sequence (for example, by welding) to form a series or parallel connection between adjacent battery cell groups 10.
  • the conductive member 24 connects the electrode terminal 12 on the first side 101 of one of the battery cell groups 10 with the electrode terminal 12 on the second side 102 of another battery cell group 10, and forms a connection area 25 on the conductive member 24, a first fixing member 21 is bonded to at least a portion of the connection area 25, and a second fixing member 22 is bonded to at least a portion of the connection area 25.
  • Example 1.2 In the present application, 2 ⁇ M ⁇ N.
  • the electrochemical device 100 includes 4 battery cells 1, 2 first fixing members 21, 2 second fixing members 22, and 1 conductive member 24.
  • each first fixing member 21 is arranged on the first side 101 of a battery cell group 10, and is bonded to at least a portion of at least one electrode terminal 12 on the first side 101 of the battery cell group 10, and different first fixing members 21 are arranged on the first side 101 of different battery cell groups 10;
  • the second fixing member 22 is arranged on the second side 102 of the battery cell group 10, and is bonded to at least a portion of at least one electrode terminal 12 on the second side 102 of the battery cell group 10, and different second fixing members 22 are arranged on the second side 102 of different battery cell groups 10.
  • the conductive member 24 connects the electrode terminal 12 on the first side 101 of one of the battery cell groups 10 with the electrode terminal 12 on the second side 102 of another battery cell group 10, and forms a connection area 25 on the conductive member 24, a first fixing member 21 is bonded to at least a portion of the connection area 25, and a second fixing member 22 is bonded to at least a portion of the connection area 25.
  • the electrochemical device 100 includes 4 battery cells 1, 3 first fixing members 21, 3 second fixing members 22, and 2 conductive members 24.
  • the battery cells 1 in each battery cell group 10 are arranged along the first direction F1, and the 3 battery cell groups 10 are arranged in sequence along the first direction F1;
  • each first The fixing member 21 is arranged on the first side 101 of a battery cell group 10 and is bonded to at least a portion of the electrode terminal 12 of the first side 101 of the battery cell group 10, and different first fixing members 21 are arranged on the first sides 101 of different battery cell groups 10;
  • each second fixing member 22 is arranged on the second side 102 of a battery cell group 10 and is bonded to at least a portion of the electrode terminal 12 of the second side 102 of the battery cell group 10, and different
  • One of the conductive members 24 connects the electrode terminal 12 on the first side 101 of the first battery cell group 10 and the electrode terminal 12 on the second side 102 of the second battery cell group 10, and forms a connection area 25 on the conductive member 24, and the first fixing member 21 of the first battery cell group 10 and the second fixing member 22 of the second battery cell group 10 are at least partially bonded to the connection area 25;
  • the other conductive member 24 connects the electrode terminal 12 on the first side 101 of the second battery cell group 10 and the electrode terminal 12 on the second side of the third battery cell group 10, and forms a connection area 25 on the conductive member 24, and the first fixing member 21 of the second battery cell group 10 and the second fixing member 22 of the third battery cell group 10 are at least partially bonded to the connection area 25.
  • At least one battery cell group 10 includes a plurality of battery cells 1 , and on a first side 101 of the battery cell group 10 , at least one electrode terminal 12 of at least one battery cell 1 among the plurality of battery cells 1 is bent.
  • At least one battery cell group 10 includes a plurality of battery cells 1 , and at least one electrode terminal 12 of at least one battery cell 1 among the plurality of battery cells 1 on the second side 102 of the battery cell group 10 is bent.
  • FIG. 4 it shows a situation where a battery cell group 10 includes two battery cells 1, wherein on a first side 101 of the battery cell group 10, at least one electrode terminal 12 of each of the two battery cells 1 is bent, and the bent electrode terminals 12 are welded to form a first electrode terminal connection assembly 121; on a second side 102 of the battery cell group 10, at least one electrode terminal 12 of each of the two battery cells 1 is bent, and the bent electrode terminals 12 are connected by welding.
  • a battery cell group 10 includes three battery cells 1. On the first side 101 of the battery cell group 10, at least one electrode terminal 12 of the two battery cells 1 on the outside of the three battery cells 1 is bent, and the electrode terminal 12 of the battery cell 1 in the middle is not bent, and the electrode terminals 12 of the three battery cells 1 are connected by welding; on the second side 102 of the battery cell group 10, at least one electrode terminal 12 of the two battery cells 1 on the outside of the three battery cells 1 is bent, and the electrode terminal 12 of the battery cell 1 in the middle is not bent, and the electrode terminals 12 of the three battery cells 1 are connected by welding. It should be understood that this does not serve as any limitation to the present application.
  • the first fixing member 21 of one battery cell group 10 is connected to the second fixing member 22 of the other battery cell group 10, and along the first direction F1, the first fixing member 21 and the second fixing member 22 form a spacing 26, which is conducive to improving the heat dissipation of the battery cell group 10.
  • one of the first fixing member 21 and the second fixing member 22 is provided with a convex portion, and the first fixing member 21 and the second fixing member 22 form a spacing 26 through the convex portion. As shown in FIG. 11, the length of the spacing 26 is indicated by T4.
  • one of the first fixing member 21 and the second fixing member 22 is provided with a convex portion
  • the other of the first fixing member 21 and the second fixing member 22 is provided with a concave portion, wherein along the first direction F1, the length of the convex portion is greater than the length of the concave portion, and the first fixing member 21 and the second fixing member 22 form a spacing 26 through the cooperation of the convex portion and the concave portion, thereby improving the connection stability of the two adjacent battery cell groups 10.
  • the first fixing member 21 includes a convex portion and a concave portion
  • the second fixing member 22 includes a convex portion and a concave portion
  • the convex portion and the concave portion cooperate to form a distance 26 between the first fixing member 21 and the second fixing member 22, further improving the connection stability of two adjacent battery cell groups 10.
  • the battery cell group 10 includes a first side 1001 and a second side 1002 opposite to each other, the first fixing member 21 includes a first convex portion 41 and a first concave portion 42, the second fixing member 22 includes a second convex portion 43 and a second concave portion 44, the first convex portion 41 and the second convex portion 43 are located on the first side 1001, and the first concave portion 42 and the second concave portion 44 are located on the second side 1002.
  • the first convex portion 41 is disposed on the second concave portion 44, and the second convex portion 43 is disposed on the first concave portion 42, wherein, along the first direction F1, the length of the first convex portion 41 is greater than the length of the second concave portion 44, and the length of the second convex portion 43 is greater than the length of the first concave portion 42, and the first fixing member 21 and the second fixing member 22 form a distance 26 through the cooperation of the convex portion and the concave portion, which is conducive to improving the heat dissipation of the battery cell group 10.
  • the length of the first protrusion 41 is equal to the length of the second recess 44
  • the length of the second protrusion 43 is equal to the length of the first recess 42 , so as to further improve the connection stability between two adjacent battery cell groups 10 .
  • the battery cell group 10 includes a first side 1001 and a second side 1002 opposite to each other, the first fixing member 21 includes a first convex portion 41 and a first concave portion 42, the second fixing member 22 includes a second convex portion 43 and a second concave portion 44, the first convex portion 41 and the second concave portion 44 are located on the first side 1001, the first concave portion 42 and the second convex portion 43 are located on the second side 1002, and the second convex portion 43 is disposed on the first concave portion 42 of two adjacent battery cell groups 10, wherein, along the first direction F1, the length of the second convex portion 43 is greater than the length of the first concave portion 42, and the first fixing member 21 and the second fixing member 22 form a spacing 26 through the cooperation of the second convex portion 43 and the first concave portion 42, which is conducive to improving the heat dissipation of the battery cell group 10.
  • the first fixing member 21 includes a first convex portion 41 and a first con
  • the first fixing member 21 includes a first sleeve 210.
  • the wall thickness of the first sleeve 210 satisfies greater than or equal to 1 mm and less than or equal to 5 mm.
  • the wall thickness of the first sleeve 210 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc., which is conducive to improving the protection effect of the electrode terminal.
  • the wall thickness of the first sleeve 210 along the first direction F1 is shown as T5 in Figure 11.
  • the second fixing member 22 includes a second sleeve 220.
  • the wall thickness of the second sleeve 220 satisfies greater than or equal to 1 mm and less than or equal to 5 mm.
  • the wall thickness of the second sleeve 220 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc., which is conducive to improving the protection effect of the electrode terminal.
  • the wall thickness of the second sleeve 220 along the first direction F1 is shown as T5 in Figure 11.
  • the electrochemical device 100 further includes an elastic member 5, which is disposed between two adjacent battery cell groups 10, and the elastic member 5 is connected to at least one of the two battery cell groups 10.
  • the battery cell group 10 compresses the elastic member 5, and the elastic member 5 is deformed, thereby providing a deformation space for the expanded battery cell 1.
  • the elastic member 5 may be connected to the battery cell group 10 in a bonding manner, so as to contact at least one of the two battery cell groups 10.
  • the bonding may be performed by glue, double-sided tape, etc., which is not limited here.
  • the elastic member 5 includes foam.
  • Foam is a material made by foaming plastic particles. Foam has a series of characteristics such as good elasticity, light weight, rapid pressure-sensitive fixation, easy use, flexible bending, ultra-thin volume, and reliable performance.
  • the types of foam include PU foam, anti-static foam, conductive foam, EPE foam, anti-static EPE foam, CR foam, EVA foam, cross-linked PE foam, SBR foam, EPDM foam, etc.
  • the present application does not limit the type of the elastic member 5 when it includes foam.
  • the elastic member 5 includes a spring.
  • the elastic member 5 includes a first plate, a second plate, and a spring, the spring is connected between the first plate and the second plate, the first plate is connected to one of the two adjacent battery cell groups 10 along the first direction F1, and the second plate is connected to the other of the two battery cell groups 10.
  • the first plate and/or the second plate moves to compress the spring, the spring deforms and supports the expanded battery cell 1, and buffers the pressure generated when the battery cell 1 expands, and improves the situation where the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion.
  • the thickness of the elastic member 5 when not compressed by the battery cell is T1, along the first direction F1, the spacing formed between two adjacent battery cell groups in the first direction F1 is T2, the thickness of the battery cell 1 when not undergoing a charge and discharge cycle is T3, and half of the sum of the number of battery cells 1 in two adjacent battery cell groups 10 along the first direction F1 is X, then T1, T2, T3, and X satisfy: T2-X*T3*20% ⁇ T1 ⁇ T2.
  • X is a decimal when only one of the number of battery cells 1 of two adjacent battery cell groups 10 along the first direction F1 is an odd number, and X is an integer in other cases.
  • the elastic member 5 may only contact the battery cell 1 of the first battery cell group 10 of two adjacent battery cell groups 10 (respectively referred to as the first battery cell group 10 and the second battery cell group 10) along the first direction F1; and when the battery cell 1 of the battery cell group 10 expands to 20% of the initial thickness, the elastic member 5 begins to contact the battery cell 1 of the second battery cell group 10, and in the subsequent expansion process, the elastic member 5 is compressed and supports the expansion of the battery cell 1, thereby reducing the risk of tearing of the outer packaging of the battery cell 1 (for example, made of metal plastic film) due to expansion, and buffering the pressure generated when the battery cell 1 expands, and improving the situation where the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion, thereby meeting the use requirements of the electrochemical device 100.
  • the elastic member 5 can contact two adjacent battery cell groups 10 along the first direction F1 at the same time.
  • the elastic member 5 is compressed and supports the expanded battery cell 1, thereby reducing the risk of tearing of the outer packaging of the battery cell 1 (for example, made of metal plastic film) due to expansion, buffering the pressure generated by the expansion of the battery cell 1, and improving the situation where the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion, thereby meeting the use requirements of the electrochemical device 100.
  • T1, T2, T3, and X satisfy the following: T2-X*T3*15% ⁇ T1 ⁇ T2-X*T3*0.5%.
  • one side of the elastic member 5 along the first direction F1 is not in contact with the battery cell 1 of the battery cell group 10.
  • the elastic member 5 can contact the battery cells 1 of the battery cell group 10 on both sides at the same time, and then the elastic member 5 is compressed and supports the expansion of the battery cell 1, thereby reducing the risk of tearing of the outer packaging of the battery cell 1 (for example, made of metal plastic film) due to expansion, and buffering the pressure generated when the battery cell 1 expands, thereby improving the situation where the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion, thereby meeting the use requirements of the electrochemical device 100.
  • the electrochemical device 100 further includes a housing 4, and the housing 4 includes a first wall 401 and a second wall 402 that are arranged opposite to each other along a first direction F1.
  • An elastic structure such as foam may be provided between the first wall 401 and the M battery cell groups 10, and an elastic structure such as foam may be provided between the second wall 402 and the M battery cell groups 10, which is not limited here.
  • the housing 4 includes a third wall 403 and a fourth wall 404 that are arranged opposite to each other along a third direction F3, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2. At least one of the third wall 403 and the fourth wall 404 is provided with a fifth protrusion 71, and along the first direction F1, the fifth protrusion 71 is provided between the adjacent first fixing member 21 and the second fixing member 22 to limit the movement of the battery cell group 10.
  • the first fixing member 21 is provided with at least one first through hole 61, which penetrates the first fixing member 21 along the third direction F3; and/or the second fixing member 22 is provided with at least one first through hole 61, which penetrates the second fixing member 22 along the third direction F3; wherein the third direction F3 is perpendicular to the first direction F1 and the second direction F2.
  • This is beneficial to the heat dissipation of the electrode terminal 12 to which the first fixing member 21 and/or the second fixing member 22 are bonded.
  • the third wall 403 and/or the fourth wall 404 is provided with a second through hole 62, and the second through hole 62 is communicated with the first through hole 61.
  • such a structure can further enhance the heat dissipation effect.
  • an electrochemical device 100 comprising: N battery cells 1, A first fixing members 21, A second fixing members 22, and (L-1)*A third fixing members 23, wherein N, M, and L are all positive integers and 2 ⁇ M ⁇ N, and L ⁇ 2; the N battery cells 1 are divided into M battery cell groups 10, and the M battery cell groups are divided into A rows and L columns.
  • the battery cell groups 10 include first fixing members 21 and 22 arranged relatively to each other.
  • each battery cell group 10 includes at least one battery cell 1, and the battery cells 1 in the battery cell group 10 are arranged along a first direction F1, and the second direction F2 is perpendicular to the first direction F1;
  • the battery cell 1 includes a battery cell shell 11 and two electrode terminals 12, and the two electrode terminals 12 are relatively arranged on both sides of the battery cell shell 11 along the second direction F2; wherein, in a row of battery cell groups A1, the first fixing member 21 is located on the first side 101 of the first battery cell group 10 in the row of battery cell groups A1, and is bonded to at least part of the electrode terminal 12 of the first side 101 of the first battery cell group 10; the second fixing member 22 is located on the first side 101 of the battery cell group A1
  • the second side 102 of the last cell group 10 in A1 is bonded to at least a portion of the electrode terminal 12 of the second side 102 of the last cell group 10; in a row of cell groups A1, the electrode terminals 12 of two adjacent cell groups 10 are connected,
  • the electrochemical device 100 provided in the second aspect of the embodiments of the present application is described in detail below. It should be understood that the contents described below do not constitute any limitation to the embodiments of the present application.
  • the electrochemical device 100 provided in the second aspect of the present application may be a secondary battery, and its type may be but is not limited to a lithium ion battery, a sodium ion battery, a lead storage battery, and the like.
  • each battery cell includes an electrode assembly 13, a battery cell shell 11 and an electrode terminal 12, the electrode assembly 13 is disposed in the battery cell shell 11, and the electrode terminal 12 is connected to the electrode assembly 13 and extends out of the battery cell shell 11.
  • the electrode terminal 12 includes two, one of which is a positive electrode terminal and the other is a negative electrode terminal.
  • the positive electrode terminal and the negative electrode terminal are disposed at the same end of the battery cell shell 11.
  • the positive electrode terminal and the negative electrode terminal are disposed at opposite ends of the battery cell shell 11. This specification takes the example of the positive electrode terminal and the negative electrode terminal being disposed at opposite ends of the battery cell shell 11.
  • the electrode terminal 12 includes a first section 1201 located inside the cell casing 11 and a second section 1202 located outside the cell casing 11 .
  • the first section 1201 is connected to the electrode assembly 13 .
  • the electrode assembly 13 may include a positive electrode sheet, a negative electrode sheet, and a separator, wherein the separator is located between the positive electrode sheet and the negative electrode sheet.
  • the electrode assembly 13 may be formed by winding the positive electrode sheet, the separator, and the negative electrode sheet, or by stacking the positive electrode sheet, the separator, and the negative electrode sheet.
  • the relevant contents of the positive electrode sheet, the separator, and the negative electrode sheet may refer to the relevant technology, and no limitation is made in this application.
  • the positive electrode sheet may include a positive active material layer and a positive current collector, wherein the positive active material layer is disposed on the positive current collector, for example, the positive active material layer may be coated on the positive current collector, and there is a blank foil area at the edge of the positive current collector, and the electrode terminal 12 is connected to the blank foil area, for example, the electrode terminal 12 may be used as a positive electrode terminal or an electrode terminal for sampling.
  • the negative electrode plate may include a negative electrode active material layer and a negative electrode current collector, wherein the negative electrode active material layer is disposed on the negative electrode current collector, for example, the negative electrode active material layer may be coated on the negative electrode current collector, and there is a blank foil area at the edge of the negative electrode current collector, and the electrode terminal 12 is electrically connected to the blank foil area, for example, the electrode terminal 12 may be used as a negative electrode terminal or an electrode terminal for sampling.
  • the projection of the first fixing member 21 is separated from the projection of the electrode assembly 13 of the battery cell 1 in the battery cell group 10, thereby reducing the influence of the first fixing member 21 on the expansion of the electrode assembly 13.
  • the electrode assembly 13 is represented by a dotted frame.
  • the projection of the second fixing member 22 is separated from the projection of the electrode assembly 13 of the battery cell 1 in the battery cell group 10, thereby reducing the influence of the second fixing member 22 on the expansion of the electrode assembly 13.
  • the electrode assembly 13 is represented by a dotted frame.
  • the projection of the third fixing member 23 is separated from the projection of the electrode assembly 13 of the battery cell 1 in the battery cell group 10, thereby reducing the influence of the third fixing member 23 on the expansion of the electrode assembly 13.
  • the electrode assembly 13 is represented by a dotted frame.
  • 16 battery cell groups 10 are arranged into an even number of rows of battery cell groups, specifically, 16 battery cell groups 10 are arranged into 8 rows of battery cell groups, each row of battery cell groups includes 2 battery cell groups 10, and the 8 rows of battery cell groups are stacked along the first direction F1.
  • the electrochemical device 100 includes 8 first fixing members 21 and 8 second fixing members 22. Along the first direction F1, adjacent battery cell groups 10 are connected by a conductive member 24.
  • the electrode terminal 12 of the first side 101 of one battery cell group 10 is connected to the electrode terminal 12 of the second side 102 of the other battery cell group 10 by the conductive member 24, and a connection area 25 is formed on the conductive member 24, one first fixing member 21 is bonded to at least part of the connection area 25, and 7 first fixing members 21 are bonded to at least part of 7 connection areas 25.
  • adjacent cell groups 10 are connected by the conductive member 24.
  • the electrode terminal 12 on the first side 101 of one cell group 10 is connected to the electrode terminal 12 on the second side 102 of the other cell group 10 by the conductive member 24, and a connection area 25 is formed on the conductive member 24.
  • a second fixing member 22 is bonded to at least part of the connection area 25, and seven second fixing members 22 are bonded to at least parts of the seven connection areas. After the eight rows of cell groups are connected, a positive connection terminal and a negative connection terminal are formed. A first fixing member 21 is bonded to the electrode terminal 12 of the positive connection terminal 27, and a second fixing member 22 is bonded to the electrode terminal 12 of the negative connection terminal 28.
  • the electrochemical device 100 includes 9 first fixing members, 9 second fixing members, and 9 third fixing members. Along the first direction F1, adjacent battery cell groups 10 are connected by a conductive member 24.
  • the electrode terminal 12 of the first side 101 of one battery cell group 10 is connected to the electrode terminal 12 of the second side 102 of the other battery cell group 10 through the conductive member 24, and a connection area 25 is formed on the conductive member 24, and one first fixing member 21 is bonded to at least part of the connection area 25, and 8 first fixing members 21 are bonded to at least part of 8 connection areas 25.
  • adjacent cell groups 10 are connected by the conductive member 24.
  • the electrode terminal 12 on the first side 101 of one cell group 10 is connected to the electrode terminal 12 on the second side 102 of the other cell group 10 by the conductive member 24, and a connection area 25 is formed on the conductive member 24.
  • a second fixing member 22 is bonded to at least part of the connection area 25, and eight second fixing members 22 are bonded to at least parts of the eight connection areas. After the nine rows of cell groups are connected, a positive electrode connection end and a negative electrode connection end are formed. One of the second fixing member 22 and the first fixing member 21 is bonded to the electrode terminal 12 of the positive electrode connection end, and the other is bonded to the electrode terminal 12 of the negative electrode connection end.
  • the A row of cell groups are stacked in sequence along the first direction F1.
  • the first row of cell groups A1 and the second row of cell groups A2 are used as an example for description.
  • the first row of cell groups A1 and the second row of cell groups A2 are stacked along the first direction F1, the first row of cell groups A1 includes at least 2 cell groups 10 arranged along the second direction F2, and the second row of cell groups A2 includes at least 2 cell groups 10 arranged along the second direction F2.
  • the first row of cell groups A1 includes 2 cell groups 10 arranged along the second direction F2, and the second row of cell groups A2 includes 2 cell groups 10 arranged along the second direction F2.
  • the first row of cell groups A1 includes cell groups A1-1 and A1-2, and the second row of cell groups A2 includes cell groups A2-1 and A2-2.
  • the electrode terminals 12 of two adjacent cell groups A1-1 and the electrode terminals 12 of the cell group A2-1 are connected by a conductive member 24, and a connecting area 25 is formed on the conductive member 24.
  • the connection methods include laser welding connection and ultrasonic welding connection.
  • the electrode terminals 12 of two adjacent battery cell groups A1-2 and the electrode terminals 12 of the battery cell group A2-2 are connected by a conductive member 24, and a connection area 25 is formed on the conductive member 24, and the connection method includes laser welding connection and ultrasonic welding connection.
  • the electrode terminal 12 and the conductive member 24 are connected by a mechanical structure, one of the electrode terminal 12 and the conductive member 24 is provided with a recess, and the other of the electrode terminal 12 and the conductive member 24 is provided with a protrusion, the recess and the protrusion are connected, and a connection area 25 is formed on the conductive member 24.
  • the electrode terminal 12 and the conductive member 24 are connected by conductive glue, and at least one electrode terminal 12 of each of the two battery cell groups 10 is respectively glued to the conductive member 24 by conductive glue to be connected through the conductive member 24 and form a connection area 25 on the conductive member 24.
  • the electrode terminals 12 of two adjacent battery cell groups 10 are connected and then connected through other conductive members and the conductive member 24 by welding.
  • one of the two electrode terminals 12 of the battery cell 1 is a positive electrode terminal, and the other is a negative electrode terminal.
  • the N battery cells 1 of the electrochemical device 100 in the present application are connected in series or in parallel with each other, and ultimately the positive electrode terminal of at least one battery cell 1 forms the positive electrode of the electrochemical device 100, and the negative electrode terminal of at least one battery cell 1 forms the negative electrode of the electrochemical device 100.
  • the first fixing member 21 of one battery cell group 10 is connected to the second fixing member 22 of the other battery cell group 10, and along the first direction F1, the first fixing member 21 and the second fixing member 22 form a distance, which is conducive to improving the heat dissipation of the battery cell group 10.
  • one of the first fixing member 21 and the second fixing member 22 is provided with a convex portion, and the first fixing member 21 and the second fixing member 22 form a distance 26 through the convex portion.
  • one of the first fixing member 21 and the second fixing member 22 is provided with a convex portion
  • the other of the first fixing member 21 and the second fixing member 22 is provided with a concave portion, wherein, along the first direction F1, the length of the convex portion is greater than the length of the concave portion, and the first fixing member 21 and the second fixing member 22 form a distance 26 through the cooperation of the convex portion and the concave portion, thereby improving the connection stability of the two adjacent battery cell groups 10.
  • the first fixing member 21 includes a convex portion and a concave portion
  • the second fixing member 22 includes a convex portion and a concave portion
  • the convex portion and the concave portion cooperate to form a distance 26 between the first fixing member 21 and the second fixing member 22, further improving the connection stability of two adjacent battery cell groups 10.
  • the battery cell group 10 includes a first side 1001 and a second side 1002 opposite to each other, the first fixing member 21 includes a first convex portion 41 and a first concave portion 42, the second fixing member 22 includes a second convex portion 43 and a second concave portion 44, the first convex portion 41 and the second convex portion 43 are located on the first side 1001, and the first concave portion 42 and the second concave portion 44 are located on the second side 1002.
  • the first convex portion 41 is disposed on the second concave portion 44, and the second convex portion 43 is disposed on the first concave portion 42, wherein, along the first direction F1, the length of the first convex portion 41 is greater than the length of the second concave portion 44, and the length of the second convex portion 43 is greater than the length of the first concave portion 42, and the first fixing member 21 and the second fixing member 22 form a spacing 26 through the cooperation of the convex portion and the concave portion, which is conducive to improving the heat dissipation of the battery cell group 10.
  • the length of the first convex portion is equal to the length of the second concave portion
  • the length of the second convex portion is equal to the length of the first concave portion
  • the battery cell group 10 includes a first side 1001 and a second side 1002 opposite to each other, the first fixing member 21 includes a first convex portion 41 and a first concave portion 42, the second fixing member 22 includes a second convex portion 43 and a second concave portion 44, the first convex portion 41 and the second concave portion 44 are located on the first side 1001, the first concave portion 42 and the second convex portion 43 are located on the second side 1002, and the second convex portion 43 is disposed on the first concave portion 42 for two adjacent battery cell groups 10, wherein, along the first direction F1, the length of the second convex portion 43 is greater than the length of the first concave portion 42, and the first fixing member 21 and the second fixing member 22 form a spacing 26 through the cooperation of the second convex portion 43 and the first concave portion 42, which is conducive to improving the heat dissipation of the battery cell group 10.
  • the first fixing member 21 includes a first convex portion 41 and a first con
  • the third fixing member 23 of one battery cell group 10 is connected to the third fixing member 23 of the other battery cell group 10, and along the first direction F1, a spacing 29 is formed between the two third fixing members 23, which is conducive to improving the heat dissipation of the battery cell group 10.
  • one of the two third fixing members 23 is provided with a convex portion, and the spacing 29 is formed between the two third fixing members 23 through the convex portion.
  • one of the two third fixing members 23 is provided with a convex portion, and the other of the two third fixing members 23 is provided with a concave portion, wherein along the first direction F1, the length of the convex portion is greater than the length of the concave portion, and the spacing 29 is formed between the two third fixing members 23 through the cooperation of the convex portion and the concave portion, thereby improving the connection stability of the two adjacent battery cell groups 10.
  • both of the two third fixing members 23 include a convex portion and a concave portion, and the spacing is formed between the two third fixing members 23 through the cooperation of the convex portion and the concave portion, thereby further improving the connection stability of the two adjacent battery cell groups 10.
  • the battery cell group 10 includes a first side 1001 and a second side 1002 opposite to each other, and the third fixing member 23 includes a third protrusion 45, a third recess 46, a fourth protrusion 47 and a fourth recess 48, wherein the third protrusion 45 and the fourth protrusion 47 are located on the first side 1001, and the third recess 46 and the fourth recess 48 are located on the second side 1002.
  • the third protrusion 45 is arranged at the fourth recess 48, and the fourth protrusion 47 is arranged at the third recess 46, wherein, along the first direction F1, the length of the third protrusion 45 is greater than the length of the fourth recess 48, and the length of the fourth protrusion 47 is greater than the length of the third recess 46, and the cooperation of the protrusion and the recess forms a spacing 29 between two adjacent third fixing members 23, which is beneficial to improve the heat dissipation of the battery cell group 10.
  • the length of the third protrusion 45 is equal to the length of the fourth recess 48
  • the length of the fourth protrusion 47 is equal to the length of the third recess 46, further improving the connection stability of the two adjacent battery cell groups 10.
  • the length of the interval 29 is indicated by T7 .
  • the battery cell group 10 includes a first side 1001 and a second side 1002 that are opposite to each other, and the third fixing member 23 includes a third protrusion 45, a third recess 46, a fourth protrusion 47 and a fourth recess 48, wherein the third recess 46 and the fourth protrusion 47 are located on the first side 1001, and the third protrusion 45 and the fourth recess 48 are located on the second side 1002.
  • the fourth protrusion 47 of one battery cell group is disposed at the third recess 46 of the other battery cell group 10 and the third protrusion 45 of one battery cell group is disposed at the fourth recess 48 of the other battery cell group 10, wherein, along the first direction F1, the length of the fourth protrusion 47 is greater than the length of the third recess 46, and the length of the third protrusion 45 is greater than the length of the fourth recess 48, and through the cooperation between the fourth protrusion 47 and the third recess 46 and the cooperation between the third protrusion 45 and the fourth recess 48, a spacing 29 is formed between two adjacent third fixing members 23, which is beneficial to improving the heat dissipation of the battery cell group 10.
  • the length of the fourth protrusion 47 is equal to the length of the third recess 46 , so as to further improve the connection stability of two adjacent battery cell groups 10 .
  • the first fixing member 21 includes a first sleeve 210.
  • the wall thickness of the first sleeve 210 satisfies greater than or equal to 1 mm and less than or equal to 5 mm.
  • the wall thickness of the first sleeve 210 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc., which is conducive to improving the protection effect of the electrode terminal.
  • the second fixing member 22 includes a second sleeve 220.
  • the wall thickness of the second sleeve 220 satisfies greater than or equal to 1 mm and less than or equal to 5 mm.
  • the wall thickness of the second sleeve 220 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc., which is conducive to improving the protection effect of the electrode terminal.
  • the third fixing member 23 includes a third sleeve 231 and a fourth sleeve 232.
  • the wall thickness of the third sleeve 231 satisfies greater than or equal to 1mm and less than or equal to 5mm.
  • the wall thickness of the third sleeve 231 is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc., which is conducive to improving the protection effect of the electrode terminal.
  • the wall thickness of the fourth sleeve 232 satisfies greater than or equal to 1mm and less than or equal to 5mm.
  • the wall thickness of the fourth sleeve 232 is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc., which is conducive to improving the protection effect of the electrode terminal.
  • the wall thickness of the third sleeve 231 along the first direction F1 is shown in T6 of FIG23.
  • the wall thickness of the fourth sleeve 232 along the first direction F1 is shown as T6 in FIG. 23 .
  • the first fixing member 21 is disposed on the first side 101 of the battery cell group 10 and the conductive member 24 by an injection molding process or a perfusion process, so as to be bonded to at least a portion of the connection area 25 near the first side 101 of the battery cell group 10. The protection of the electrode terminal 12 and the connection area 25 formed on the conductive member 24 is improved.
  • the first fixing member 21 is disposed on the first side 101 of the cell group 10 and the conductive member 24 by an injection molding process or a perfusion process, so as to be bonded to the connection area 25 near the first side 101 of the cell group 10, the second section 1202 of the electrode terminal 12, and at least a portion of the cell housing 11.
  • the protection of the connection area 25 formed on the electrode terminal 12 and the conductive member 24 is improved.
  • the second fixing member 22 is disposed on the second side 102 of the cell group 10 and the conductive member 24 by an injection molding process or a perfusion process, so as to be bonded to at least a portion of the connection area 25 near the second side 102 of the cell group 10. The protection of the connection area 25 formed on the electrode terminal 12 and the conductive member 24 is improved.
  • the second fixing member 22 is disposed on the second side 102 of the cell group 10 and the conductive member 24 by an injection molding process or a perfusion process, so as to be bonded to the connection area 25 near the second side 102 of the cell group 10, the second section 1202 of the electrode terminal 12, and at least a portion of the cell housing 11.
  • the protection of the connection area 25 formed on the electrode terminal 12 and the conductive member 24 is improved.
  • the third fixing member 22 is arranged on the first side 101 and the second side 102 of adjacent battery cell groups 10 in the same row through an injection molding process or a perfusion process, so as to be at least partially bonded to the area where the adjacent battery cell groups 10 are interconnected, thereby improving the structural strength of the first side 101 and the second side 102 of the adjacent battery cell groups 10 and improving the service life of the battery cell groups 10.
  • the third fixing member 22 is disposed on the first side 101 and the second side 102 of the adjacent battery cell groups 10 in the same row by an injection molding process or a perfusion process, and the second section 1202 is bonded to at least a portion of the battery cell housing 11, thereby improving the protection of the electrode terminal 12 and the connection area 25 formed on the conductive member 24.
  • injection molding can melt the insulating material through an injection molding device, so that the melted insulating material covers the battery cell group 10 and the conductive member 24, and the insulating material is solidified to form the first fixing member 21 or the second fixing member 22 to form a bond.
  • the injection molding process of the first fixing member 21 includes: firstly connecting at least one electrode terminal 12 of two battery cell groups 10 adjacent to each other along the first direction F1 through a conductive member 24, for example, by welding the electrode terminals of the two battery cell groups 10 to the conductive member 24 to form a connection, and then performing injection molding on the first side 101 of the battery cell group 10 and the conductive member 24 to bond with the connection area 25 close to the first side 101 of the battery cell group 10, the second section 1202 of the electrode terminal 11, and at least a portion of the battery cell shell 11, and the first fixing member 21 is formed after the material is solidified, thereby making the structure of the injection-molded first fixing member 21 more stable, which is beneficial to improving the protection effect.
  • the injection molding process of the second fixing member 22 includes: firstly connecting at least one electrode terminal 12 of two battery cell groups 10 adjacent to each other along the first direction F1 through a conductive member 24, for example, by welding the electrode terminals of the two battery cell groups 10 to the conductive member 24 to form a connection, and then performing injection molding on the second side 102 of the battery cell group 10 and the conductive member 24 to bond with the connection area 25 close to the second side 102 of the battery cell group 10, the second section 1202 of the electrode terminal 11, and at least a portion of the battery cell shell 11, and forming the second fixing member 22 after the material is cured, thereby making the structure of the injection-molded second fixing member 22 more stable, which is beneficial to improving the protection effect.
  • the injection molding can melt the insulating material through an injection molding device, so that the melted insulating material covers the first side 101 and the second side 102 of the adjacent battery cell group 10, and the insulating material is solidified to form the third fixing member 23 to form a bond.
  • the injection molding of the third fixing member 23 includes a preparation process: firstly, the electrode terminals on the first side 101 and the second side 102 of the adjacent battery cell groups 10 in the same row are connected, for example, by welding to form a connection, and then injection molding is performed on the first side 101 and the second side 102, and the connection area formed by the connection of the electrode terminals is coated with the injection molding material, and the third fixing member 22 is formed after the material is solidified.
  • the third fixing member 22 covers the connection area formed by the connection of the electrode terminals and the part of the electrode terminals located outside the battery cell shell, which is beneficial to improve the protection effect.
  • the insulating material (eg, flowable insulating material) may be used to cover the battery cell group 10 and the conductive member 24 by a pouring process, and the insulating material may be solidified to form the first fixing member 21 or the second fixing member 22 to form a bond.
  • the insulating material includes a potting glue.
  • the insulating material (eg, flowable insulating material) may be used to cover the first side 101 and the second side 102 of the adjacent battery cell groups 10 by a pouring process, and the insulating material is cured to form the third fixing member 23 to form a bond.
  • the insulating material includes a potting glue.
  • each first fixing member 21 may be the same or different, which is not limited here.
  • the shape and structure of each second fixing member 22 may be the same or different, which is not limited here.
  • At least one battery cell group 10 includes multiple battery cells 1, and on a first side 101 of the battery cell group 10, at least one electrode terminal 1 of at least one battery cell 1 among the multiple battery cells 1 is in a bent shape; and/or, at least one battery cell group 10 includes multiple battery cells 1, and on a second side 102 of the battery cell group 10, at least one electrode terminal 12 of at least one battery cell 1 among the multiple battery cells 1 is in a bent shape.
  • FIG. 17 it shows a case where a battery cell group 10 includes two battery cells 1, wherein, on a first side 101 of the battery cell group 10, at least one electrode terminal 12 of each of the two battery cells 1 is bent, and the bent electrode terminals 12 are connected by welding to form a first electrode terminal connection assembly 121; and on a second side 102 of the battery cell group 10, at least one electrode terminal 12 of each of the two battery cells 1 is bent, and the bent electrode terminals 12 are connected by welding to form a second electrode terminal connection assembly 122.
  • FIG. 18 it shows a case where a battery cell group 10 includes three battery cells 1.
  • At least one electrode terminal 12 of the two battery cells 1 on the outside of the three battery cells 1 is bent, and the electrode terminal 12 of the battery cell 1 in the middle is not bent, and the electrode terminals 12 of the three battery cells 1 are electrically connected by welding; on the second side 102 of the battery cell group 10, at least one electrode terminal 12 of the two battery cells 1 on the outside of the three battery cells 1 is bent, and the electrode terminal 12 of the battery cell 1 in the middle is not bent, and the electrode terminals 12 of the three battery cells 1 are electrically connected by welding. It should be understood that this does not serve as any limitation to the present application.
  • the electrochemical device 100 further includes an elastic member 5 ; the elastic member 5 is disposed between two adjacent battery cell groups 10 in the same column of battery cell groups 10 , and the elastic member 5 contacts at least one of the two battery cell groups 10 .
  • two adjacent cell groups 10 in the same column of cell groups 10 refer to two adjacent cell groups 10 in the same column of cell groups 10 along the first direction F1 .
  • the present application also notes that, when the electrochemical device 100 is in use, the soft-packaged battery cell 1 will expand due to long-term use. Therefore, in the embodiment of the present application, an elastic member 5 is provided between two adjacent battery cell groups 10 in the same column of battery cell groups 10, and the elastic member 5 is in contact with at least one of the two battery cell groups 10. When the battery cell 1 of the battery cell group 10 expands, the battery cell group 10 compresses the elastic member 5, and the elastic member 5 is deformed, thereby supporting the expanded battery cell 1, buffering the pressure generated when the battery cell 1 expands, and improving the situation in which the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion.
  • the elastic member 5 may be connected to the battery cell group 10 in a bonding manner, so as to contact at least one of the two battery cell groups 10.
  • the bonding may be performed by glue, double-sided tape, etc., which is not limited here.
  • an elastic member 5 may be provided between two adjacent battery cell groups 10 in each column of battery cell groups 10 .
  • the elastic member 5 may include foam.
  • Foam is a material made by foaming plastic particles. Foam has a series of characteristics such as elasticity, light weight, rapid pressure-sensitive fixation, easy use, easy bending, ultra-thin volume, and reliable performance.
  • the types of foam may include PU foam, anti-static foam, conductive foam, EPE foam, anti-static EPE foam, CR foam, EVA foam, bridged PE foam, SBR foam, EPDM foam, etc.
  • the present application does not limit the type of foam when the elastic member 5 includes it, as long as it can meet the use requirements.
  • the elastic member 5 may include a spring.
  • the elastic member 5 may include a first plate, a second plate, and a spring, wherein the spring is connected between the first plate and the second plate, wherein the first plate is connected to one of two adjacent cell groups 10 in the first direction F1 in the same column of cell groups 10, and the second plate is connected to the other of the two cell groups 10.
  • the first plate and/or the second plate are driven to move to compress the spring, and the spring is deformed and supports the expanded cell 1, and buffers the pressure generated when the cell 1 expands, and improves the situation where the cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion.
  • the thickness of the elastic member when not compressed by the battery cell is T1
  • the spacing formed in the first direction between two adjacent battery cell groups in the same column of battery cell groups is T2
  • the thickness of the battery cell when not undergoing a charge and discharge cycle is T3
  • half of the sum of the number of battery cells in two adjacent battery cell groups in the same column of battery cell groups is X
  • these examples are not intended to limit the present application. It can be seen that when only one of the numbers of battery cells 1 of two adjacent battery cell groups 10 in the same column of battery cell groups along the first direction F1 is an odd number, X is a decimal, and in other cases, X is an integer.
  • the elastic member 5 can only contact the battery cells 1 of the first battery cell group 10 of two adjacent battery cell groups 10 (respectively recorded as the first battery cell group 10 and the second battery cell group 10) in the same column of battery cell groups along the first direction F1; and when the battery cells 1 of the battery cell group 10 expand to 20% of the initial thickness, the elastic member 5 begins to contact the battery cells 1 of the second battery cell group 10.
  • the elastic member 5 is compressed and supports the expansion of the battery cells 1 to prevent the battery cells 1 from over-expanding, thereby reducing the risk of tearing of the outer packaging of the battery cells 1 (for example, made of metal plastic film) due to expansion, and buffering the pressure generated when the battery cells 1 expand, and improving the situation where the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion, thereby meeting the use requirements of the electrochemical device 100.
  • the elastic member 5 can simultaneously contact two adjacent battery cell groups 10 in the same column of battery cell groups along the first direction F1.
  • the elastic member 5 is compressed and supports the expanded battery cell 1 to prevent the battery cell 1 from over-expanding, thereby reducing the risk of tearing of the outer packaging of the battery cell 1 (for example, made of metal plastic film) due to expansion, buffering the pressure generated by the expansion of the battery cell 1, and improving the situation where the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion, thereby meeting the use requirements of the electrochemical device 100.
  • T1, T2, T3, and X satisfy the following: T2-X*T3*15% ⁇ T1 ⁇ T2-X*T3*0.5%.
  • one side of the elastic member 5 along the first direction F1 does not contact the battery cell 1 of the battery cell group 10.
  • the elastic member 5 can contact the battery cells 1 of the battery cell group 10 on both sides at the same time, and then the elastic member 5 is compressed and supports the expansion of the battery cell 1 to prevent the battery cell 1 from over-expanding, thereby better reducing the risk of tearing of the outer packaging of the battery cell 1 (for example, made of metal plastic film) due to expansion, and buffering the pressure generated when the battery cell 1 expands, so as to better improve the situation where the battery cells 1 of the electrochemical device 100 are superimposed and displaced along the first direction F1 due to expansion, thereby meeting the use requirements of the electrochemical device 100.
  • the electrochemical device 100 further includes a housing 4, and the housing 4 includes a first wall 401 and a second wall 402 that are arranged opposite to each other along a first direction F1.
  • An elastic structure such as foam may be provided between the first wall 401 and the M battery cell groups 10, and an elastic structure such as foam may be provided between the second wall 402 and the M battery cell groups 10, which is not limited here.
  • the housing 4 includes a third wall 403 and a fourth wall 404 that are arranged opposite to each other along a third direction F3, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2. At least one of the third wall 403 and the fourth wall 404 is provided with a fifth protrusion 71, and along the first direction F1, the fifth protrusion 71 is provided between the adjacent first fixing member 21 and the second fixing member 22 to limit the movement of the battery cell group 10.
  • the first fixing member 21 is provided with at least one first through hole 61, which penetrates the first fixing member 21 along the third direction F3; and/or the second fixing member 22 is provided with at least one first through hole 61, which penetrates the second fixing member 22 along the third direction F3; wherein the third direction F3 is perpendicular to the first direction F1 and the second direction F2.
  • This is beneficial to heat dissipation at the electrode terminal 12 to which the first fixing member 21 and/or the second fixing member 22 are bonded.
  • the third fixing member 23 is provided with at least one first through hole 61, and the first through hole 61 penetrates the third fixing member 23 along the third direction F3; and wherein the third direction F3 is perpendicular to the first direction F1 and the second direction F2, which is beneficial to the heat dissipation of the electrode terminal 12 to which the third fixing member 23 is bonded.
  • the third wall 403 and/or the fourth wall 404 is provided with a second through hole 62, and the second through hole 62 is communicated with the first through hole 61.
  • such a structure can further enhance the heat dissipation effect.
  • an electrical equipment 200 is also provided, comprising: an electrochemical device 100 as provided in any one of the first aspect or the second aspect.
  • the electrical equipment 200 in the embodiment of the present application includes the electrochemical device 100 provided in the embodiment of the present application.
  • the electrochemical device 100 has higher safety, stability and service life than the electrochemical devices in the prior art. Therefore, the electrical equipment 200 in the embodiment of the present application has higher safety, stability and service life.
  • the preparation flow chart according to the first aspect of the embodiment of the present application includes the following steps:
  • Step S101 connecting the electrode terminals 12 of two adjacent battery cell groups 10 of the M battery cell groups 10 through the conductive member 24 , and forming a connection area 25 on the conductive member 24 ;
  • Step S102 placing a flowable insulating material on the first side 101 of the cell group 10 and the conductive member 24. After the insulating material is cured, bonding the connection area 25 near the first side 101 of the cell group 10, the portion of the electrode terminal 12 outside the cell housing, and at least a portion of the cell housing 11 to form a first fixing member 21;
  • Step S103 a flowable insulating material is disposed on the second side 102 of the cell group 10 and the conductive member 24. After the insulating material is cured, the connection area 25 close to the second side 102 of the cell group 10, the portion of the electrode terminal 12 outside the cell shell, and at least a portion of the cell shell 11 are bonded to form a second fixing member 22.
  • step S102 includes melting the insulating material through an injection molding device through an injection molding process, and solidifying the insulating material to form the first fixing member 21 .
  • step S102 includes a potting process
  • the flowable insulating material can be solidified by the potting process to form the first fixing member 21.
  • the flowable insulating material includes a potting glue.
  • step S103 includes melting the insulating material through an injection molding process using an injection molding device, and solidifying the insulating material to form the second fixing member 22 .
  • step S103 includes a pouring process, and the flowable insulating material can be solidified by the pouring process to form the second fixing member 22.
  • the flowable insulating material includes a potting glue.
  • the preparation flow chart according to the second aspect of the embodiment of the present application includes the following steps:
  • Step S201 connecting the electrode terminals 12 of two adjacent cell groups 10 in the same row of cell groups 10, placing a flowable insulating material on the first side 101 and the second side 102 of the two adjacent cell groups 10, and after the insulating material is cured, bonding the second section 1202 of the electrode terminal 12 and at least a portion of the cell casing to form a third fixing member 23;
  • Step S202 placing a flowable insulating material on the first side 101 of the first cell group 10 in the row of cell groups 10, and after the insulating material is cured, bonding the portion of the electrode terminal outside the cell shell and at least a portion of the cell shell to form a first fixing member 21;
  • Step S203 placing a flowable insulating material on the second side 102 of the last cell group 10 in the row of cell groups 10 , and after the insulating material is cured, bonding the portion of the electrode terminal outside the cell shell and at least a portion of the cell shell to form a second fixing member 22 .
  • step S201 includes melting the insulating material through an injection molding device through an injection molding process, and solidifying the insulating material to form the third fixing member 23 .
  • step S201 includes a potting process
  • the flowable insulating material can be solidified by the potting process to form the third fixing member 23.
  • the flowable insulating material includes potting glue.
  • step S202 includes melting the insulating material through an injection molding device through an injection molding process, and solidifying the insulating material to form the first fixing member 21 .
  • step S202 includes a potting process
  • the flowable insulating material can be solidified by the potting process to form the first fixing member 21.
  • the flowable insulating material includes potting glue.
  • step S203 includes melting the insulating material through an injection molding device through an injection molding process, and solidifying the insulating material to form the second fixing member 22 .
  • step S203 includes a potting process
  • the flowable insulating material can be solidified by the potting process to form the second fixing member 22.
  • the flowable insulating material includes potting glue.
  • the preparation flow chart according to the second aspect of the embodiment of the present application further includes the following steps:
  • Step S204 providing M-1 conductive members, connecting the electrode terminals on the first side of the first cell group in one of two adjacent rows of cell groups with the electrode terminals on the second side of the first cell group in the other row of cell groups through the conductive members, and forming a connection area 25 on the conductive members;
  • Step S205 placing a flowable insulating material on the first side of the battery cell group and the conductive member, and after the insulating material is cured, bonding the connection area 25 close to the first side of the battery cell group;
  • Step S206 placing a flowable insulating material on the second side of the cell group and the conductive member, and after the insulating material is cured, bonding the connection area 25 close to the second side of the cell group.
  • step S205 includes melting the insulating material through an injection molding device through an injection molding process, and bonding the insulating material to the connection area after solidification.
  • step S205 includes a potting process, and the flowable insulating material can be solidified and bonded to the connection area through the potting process.
  • the flowable insulating material includes a potting glue.
  • step S206 includes melting the insulating material through an injection molding device through an injection molding process, and bonding the insulating material to the connection area after solidification.
  • step S206 includes a potting process, and the flowable insulating material can be solidified and bonded to the connection area through the potting process.
  • the flowable insulating material includes potting glue.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电化学装置(100)、用电设备(200)及电化学装置(100)的制备方法。电化学装置(100)中,N个电芯被分成M个电芯组(10),电芯组(10)内的电芯(1)沿第一方向设置,M个电芯组(10)沿第一方向设置;电芯(1)包括电芯壳体(11)和两个电极端子(12);沿第一方向,相邻两个电芯组(10)的电极端子(12)通过导电件(24)连接,且在导电件(24)上形成连接区域(25);沿第二方向,电芯组(10)包括相对设置的第一侧和第二侧,第一固定件(21)与该电芯组(10)第一侧的电极端子(12)的至少部分粘接,且至少一个第一固定件(21)与连接区域(25)的至少部分粘接,和/或,第二固定件(22)与该电芯组(10)第二侧的电极端子(12)的至少部分粘接,且至少一个第二固定件(22)与连接区域(25)的至少部分粘接。

Description

电化学装置、用电设备及电化学装置的制备方法 技术领域
本申请实施例涉及电化学技术领域,尤其涉及一种电化学装置、用电设备及电化学装置的制备方法。
背景技术
目前,电化学装置中通常会将多个电芯通过电极端子连接,在电化学装置的使用和运输过程中,电极端子连接处可能会受力变形,影响电化学装置的使用。
发明内容
为了解决上述问题,本申请实施例提供了一种电化学装置、用电设备及电化学装置的制备方法,以改善上述问题。
根据本申请的第一方面,提供了一种电化学装置,包括:N个电芯、M个第一固定件、M个第二固定件和M-1个导电件,其中,N、M均为正整数且2≤M≤N;所述N个电芯被分成M个电芯组,每个电芯组包括至少一个电芯,所述电芯组内的电芯沿第一方向设置,所述M个电芯组沿第一方向设置;所述电芯包括电芯壳体和两个电极端子,两个电极端子相对设置于所述电芯壳体沿第二方向上的两侧,其中,所述第二方向为所述第一固定件和所述第二固定件相对设置的方向,且所述第二方向与所述第一方向垂直;沿所述第一方向,相邻两个电芯组的电极端子通过导电件连接,且在所述导电件上形成连接区域;沿所述第二方向,所述电芯组包括相对设置的第一侧和第二侧,其中,所述第一固定件与该电芯组第一侧的电极端子的至少部分粘接,且至少一个第一固定件与所述连接区域的至少部分粘接,和/或,所述第二固定件与该电芯组第二侧的电极端子的至少部分粘接,且至少一个第二固定件与所述连接区域的至少部分粘接。
上述电化学装置中,第一固定件与电芯组第一侧的电极端子的至少部分粘接,且至少一个第一固定件与连接区域的至少部分粘接,有利于保护电极端子和导电件,并对连接区域提供保护,提高电化学装置的稳定性。第二固定件与电芯组第二侧的电极端子的至少部分粘接,且至少一个第二固定件与连接区域的至少部分粘接,有利于提升对电极端子和导电件的保护,以及对电极端子和导电件上形成的连接区域的保护,提高电化学装置的稳定性。
在本申请的一些实施例中,至少一个电芯组包括多个电芯,在该电芯组的第一侧,多个电芯中的每个电芯的电极端子相互连接;和/或,至少一个电芯组包括多个电芯,在该电芯组的第二侧,多个电芯中的每个电芯的电极端子相互连接。电芯组包括多个电芯时,有利于相邻的电芯组之间形成串联或并联。
在本申请的一些实施例中,至少一个电芯组包括多个电芯,在该电芯组的第一侧,多个电芯中的每个电芯的至少一个电极端子通过焊接相互连接;和/或,至少一个电芯组包括多个电芯,在该电芯组的第二侧,多个电芯中的每个电芯的至少一个电极端子通过焊接相互连接。有利于提高多个电芯相互连接的稳定性。
在本申请的一些实施例中,至少一个电芯组包括多个电芯,在该电芯组的第一侧,多个电芯中的至少一个电芯的至少一个电极端子呈弯折状;和/或,至少一个电芯组包括多个电芯,在该电芯组的第二侧,多个电芯中的至少一个电芯的至少一个电极端子呈弯折状。有利于提高多个电芯相互连接时的空间利用率。
在本申请的一些实施例中,所述电化学装置还包括弹性件;所述弹性件设置于相邻的两个电芯组之间,所述弹性件与该两个电芯组中的至少一个电芯组接触。弹性件有利于对膨胀的电芯提供变形空间。
在本申请的一些实施例中,所述弹性件在未被电芯压缩时的厚度为T1,沿第一方向上相邻的两个电芯组之间在第一方向上形成的间距为T2,电芯在未经过充放电循环时的厚度为T3,沿第一方向上相邻的两个电芯组中的电芯数量之和的一半为X,则T1、T2、T3、X之间满足:T2-X*T3*20%≤T1≤T2。弹性件有利于在电芯膨胀时提供变形空间并进行支撑,有利于降低电芯损坏的风险,提高电化学装置的使用寿命。
在本申请的一些实施例中,所述第一固定件包括第一套筒,沿所述第一方向,所述第一套筒的壁厚大于等于1mm且小于等于5mm;和/或,所述第二固定件包括第二套筒,沿所述第一方向,所述第二套筒的壁厚大于等于1mm且小于等于5mm。有利于提高对电极端子的保护效果。
在本申请的一些实施例中,相邻两个电芯组中,一个电芯组的第一固定件与另一个电芯组的第二固定件连接,第一固定件和第二固定件在第一方向上形成间距。相邻两个电芯组之间也形成间距,有利于提升电芯组的散热,进而提升电化学装置的散热。
在本申请的一些实施例中,沿第一方向,第一固定件和第二固定件中的一个设有凸部,第一固定件和第二固定件通过凸部形成间距。
在本申请的一些实施例中,沿第一方向,第一固定件和第二固定件中的另一个设有凹部,凸部沿第一方向的长度大于凹部沿第一方向的长度,第一固定件和第二固定件通过凸部和凹部的配合形成间距。
上述电化学装置中,沿第一方向,凸部的长度大于凹部的长度,凸部与凹部配合,第一固定件与第二固定件 之间形成间距,相邻的电芯组之间也形成间距,有利于提升电芯组的散热,进而提升电化学装置的散热。
在本申请的一些实施例中,所述电芯还包括电极组件,电极组件设置于电芯壳体内,两个电极端子连接于电极组件并伸出所述电芯壳体;在同一个电芯组中,沿第一方向,第一固定件的投影与该电芯组中的电芯的电极组件的投影相离;和/或,在同一个电芯组中,沿第一方向,第二固定件的投影与该电芯组中的电芯的电极组件的投影相离。
上述电化学装置中,在同一个电芯组中,沿第一方向,第一固定件和第二固定件的投影均与电极组件的投影相离,有利于降低对电极组件膨胀的影响,提高电化学装置的使用寿命。
在本申请的一些实施例中,至少一个第一固定件通过注塑工艺成型于电芯组的第一侧以及连接区域的至少部分;和/或,至少一个第二固定件通过注塑工艺成型于电芯组的第二侧以及连接区域的至少部分。有利于提升对电极端子和导电件上形成的连接区域的保护。
在本申请的一些实施例中,第一固定件包覆电极端子位于电芯壳体外的部分和电芯壳体的至少部分;和/或,第二固定件包覆电极端子位于电芯壳体外的部分和电芯壳体的至少部分。有利于提升对电极端子和电芯的保护。
在本申请的一些实施例中,第一固定件开设有至少一个第一通孔,所述第一通孔沿第三方向贯穿所述第一固定件;和/或,所述第二固定件开设有至少一个第一通孔,所述第一通孔沿第三方向贯穿所述第二固定件,其中,所述第三方向垂直于所述第一方向和所述第二方向。有利于第一固定件和/或第二固定件所粘接的电极端子处的散热,提升电化学装置的散热。
在本申请的一些实施例中,电化学装置还包括外壳;外壳包括沿所述第三方向相对设置的第三壁面和第四壁面;第三壁面和/或第四壁面上开设有第二通孔,第二通孔与第一通孔相通。通过上述设置,有利于进一步增强电化学装置的散热效果。根据本申请的第二方面,提供了一种电化学装置,包括:N个电芯、A个第一固定件、A个第二固定件、(L-1)*A个第三固定件,其中,N、M、L均为正整数且2≤M≤N,L≥2;所述N个电芯被分成M个电芯组,所述M个电芯组被分为A行L列,沿第二方向,所述电芯组包括相对设置的第一侧和第二侧;每个所述电芯组包括至少一个电芯,所述电芯组内的电芯沿第一方向设置,所述第二方向与所述第一方向垂直;所述电芯包括电芯壳体和两个电极端子,两个电极端子相对设置于所述电芯壳体沿所述第二方向上的两侧;其中,在一行电芯组中,所述第一固定件位于该行电芯组中的第一个电芯组的第一侧,并与该第一个电芯组第一侧的电极端子的至少部分粘接;所述第二固定件位于该行电芯组中的最后一个电芯组的第二侧,并与该最后一个电芯组第二侧的电极端子的至少部分粘接;在一行电芯组中,相邻的两个电芯组的电极端子连接,所述第三固定件分别与相邻的两个电芯组连接,所述第三固定件与该相邻的两个电芯组中的一个电芯组的第二侧的电极端子的至少部分粘接,且所述第三固定件与该相邻的两个电芯组中的另一个电芯组的第一侧的电极端子的至少部分粘接。
上述电化学装置中,第一固定件、第二固定件和第三固定件有利于加强对电芯组的各个电极端子的保护,提升电化学装置的稳定性和使用寿命。
在本申请的一些实施例中,所述A行电芯组沿第一方向堆叠设置;所述电化学装置还包括A-1个导电件;相邻的两行电芯组中,其中一行电芯组中的第一个电芯组的第一侧的电极端子与另一行电芯组中的第一个电芯组的第二侧的电极端子通过导电件连接,且在导电件上形成连接区域,至少一个所述第一固定件与该连接区域的至少部分粘接,和/或,至少一个所述第二固定件与该连接区域的至少部分粘接。有利于提升对电极端子和导电件上形成的连接区域的保护,提高电化学装置的稳定性。
在本申请的一些实施例中,在同一行电芯组的相邻的两个电芯组中,一个电芯组的第二侧的电极端子与另一个电芯组的第一侧的电极端子通过焊接相互连接,有利于提高相邻电芯组连接的稳定性。
在本申请的一些实施例中,至少一个电芯组包括多个电芯,在该电芯组的第一侧,多个电芯中的至少一个电芯的电极端子呈弯折状;和/或,至少一个电芯组包括多个电芯,在该电芯组的第二侧,多个电芯中的至少一个电芯的电极端子呈弯折状。有利于提高多个电芯相互连接时的空间利用率。
在本申请的一些实施例中,所述电化学装置还包括弹性件;所述弹性件设置于同一列电芯组中的相邻的两个电芯组之间,所述弹性件与该两个电芯组中的至少一个电芯组接触。弹性件有利于对膨胀的电芯提供变形空间。
在本申请的一些实施例中,所述弹性件在未被电芯压缩时的厚度为T1,同一列电芯组中相邻的两个电芯组之间在第一方向上形成的间距为T2,电芯在未经过充放电循环时的厚度为T3,同一列电芯组中相邻的两个电芯组中的电芯数量之和的一半为X,则T1、T2、T3、X之间满足:T2-X*T3*20%≤T1≤T2。弹性件有利于在电芯膨胀时提供变形空间并进行支撑,有利于降低电芯损坏的风险,提高电化学装置的使用寿命。
在本申请的一些实施例中,所述第一固定件包括第一套筒,沿所述第一方向,所述第一套筒的壁厚大于等于1mm且小于等于5mm;和/或,所述第二固定件包括第二套筒,沿所述第一方向,所述第二套筒的壁厚大于等于1mm且小于等于5mm;和/或,所述第三固定件包括第三套筒和第四套筒,沿所述第一方向,第三套筒的壁厚大于等于1mm且小于等于5mm,第四套筒的壁厚大于等于1mm且小于等于5mm。有利于提高对电极端子的保护效果。
在本申请的一些实施例中,至少一个第一固定件通过注塑工艺成型于该行电芯组中的第一个电芯组的第一侧以及连接区域的至少部分;和/或,至少一个第二固定件通过注塑工艺成型于该行电芯组中的最后一个电芯组的第二侧以及连接区域的至少部分;和/或,在一行电芯组中相邻的两个电芯组,至少一个第三固定件通过注塑工艺成型于一个电芯组的第二侧以及另一个电芯组的第一侧。有利于提升对电极端子和导电件形成的连接区域的保护,有利于提升对电极端子与电极端子连接时的保护,提升电化学装置的稳定性。
在本申请的一些实施例中,第一固定件包覆电极端子位于电芯壳体外的部分和电芯壳体的至少部分;和/或,第二固定件包覆电极端子位于电芯壳体外的部分和电芯壳体的至少部分;和/或,第三固定件包覆电极端子位于电芯壳体外的部分和电芯壳体的至少部分。有利于提升对电极端子和电芯的保护。
在本申请的一些实施例中,第一固定件开设有至少一个第一通孔,第一通孔沿第三方向贯穿第一固定件;和/或,第二固定件开设有至少一个第一通孔,第一通孔沿第三方向贯穿第二固定件;和/或,第三固定件开设有至少一个第一通孔,第一通孔沿第三方向贯穿第三固定件;其中,第三方向垂直于第一方向和第二方向。有利于第一固定件和/或第二固定件和/或第三固定件所粘接的电极端子处的散热,提升电化学装置的散热。
在本申请的一些实施例中,沿第一方向,相邻的两个电芯组中,其中一个电芯组中的第一固定件与另一个电芯组的第二固定件连接,第一固定件和第二固定件在第一方向上形成间距;和/或,沿第一方向,相邻的两个电芯组中,其中一个电芯组的第三固定件与另外一个电芯组的第三固定件连接,两个第三固定件在第一方向上形成间距。有利于提升电芯组的散热,进而提升电化学装置的散热。
在本申请的一些实施例中,电芯还包括电极组件,电极组件设置于电芯壳体内,两个电极端子连接于电极组件并伸出电芯壳体;在同一个电芯组中,沿第一方向,第一固定件的投影与该电芯组中的电芯的电极组件的投影相离;和/或,在同一个电芯组中,沿第一方向,第二固定件的投影与该电芯组中的电芯的电极组件的投影相离;和/或,在同一行电芯组中,沿第一方向,相邻的两个电芯组之间的第三固定件的投影与该两个电芯组中的电芯的电极组件的投影相离。有利于降低对电极组件膨胀的影响,提高电化学装置的使用寿命。
在本申请的一些实施例中,所述电化学装置还包括外壳,外壳包括沿第三方向相对设置的第三壁面以及第四壁面;第三壁面和/或第四壁面上开设有第二通孔,第二通孔与第一通孔相通。通过上述设置,有利于进一步增强电化学装置的散热效果。
根据本申请实施例中的第三方面,提供了一种用电设备,包括:如前述第一方面或第二方面中任一项的电化学装置。
根据本申请实施例中的第一方面的制备流程图,提供了一种电化学装置的制备方法,所述方法包括:步骤S101:将M个电芯组的相邻两个电芯组的电极端子通过导电件连接,且在导电件上形成连接区域;步骤S102:将可流动的绝缘材料设于电芯组的第一侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第一侧的连接区域、电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第一固定件;步骤S103:将可流动的绝缘材料设于电芯组的第二侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第二侧的连接区域、电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第二固定件。
根据本申请实施例中的第二方面的制备流程图,提供了一种电化学装置的制备方法,所述方法包括:步骤S201:将同一行电芯组中相邻两个电芯组的电极端子连接,将可流动的绝缘材料设于相邻两个电芯组的第一侧和第二侧,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第三固定件;步骤S202:将可流动的绝缘材料设于该行电芯组中的第一个电芯组的第一侧,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第一固定件;步骤S203:将可流动的绝缘材料设于该行电芯组中的最后一个电芯组的第二侧,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第二固定件。
根据本申请实施例中的第二方面的制备流程图,所述方法还包括:步骤S204:提供M-1个导电件,将相邻两行电芯组中的其中一行电芯组中的第一个电芯组的第一侧的电极端子与另一行电芯组中的第一个电芯组的第二侧的电极端子通过导电件连接,且在导电件上形成连接区域;步骤S205:将可流动的绝缘材料设于电芯组的第一侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第一侧的连接区域粘接;步骤S206:将可流动的绝缘材料设于电芯组的第二侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第二侧的连接区域粘接。
本申请实施例中第一方面的电化学装置,第一固定件与电芯组第一侧的电极端子的至少部分粘接,且至少一个第一固定件与电极端子和导电件形成的连接区域的至少部分粘接;和/或,第二固定件与电芯组第二侧的电极端子的至少部分粘接,且至少一个第二固定件与电极端子和导电件形成的连接区域的至少部分粘接。各个第一固定件和各个第二固定件有利于保护电芯的电极端子,并且有利于对电极端子和导电件形成的连接区域起到保护效果,进而提高电化学装置的稳定性和使用寿命。
本申请实施例中第二方面的电化学装置,在一行电芯组中,相邻的两个电芯组的电极端子连接,第三固定件与该相邻的两个电芯组中的一个电芯组的第二侧的电极端子的至少部分粘接,且第三固定件与该相邻的两个电芯组中的另一个电芯组的第一侧的电极端子的至少部分粘接。第一固定件与电极端子和导电件形成的连接区域的至少部分粘接,和/或,第二固定件与电极端子和导电件形成的连接区域的至少部分粘接。各个第一固定件、各个第二固定件和各个第三固定件有利于保护电芯的电极端子,并且有利于对电极端子和导电件形成的连接区域起到保护效果,进而提高电化学装置的稳定性和使用寿命。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请实施例中记载的一些实施例,对于本领域普通 技术人员来讲,还可以根据这些附图获得其他的附图。
图1示出了本申请的一个可选的电化学装置的示意图。
图2示出了本申请的一个可选的电化学装置的电芯排列的示意图。
图3示出了本申请的另一个可选的电化学装置的电芯排列的示意图。
图4示出了本申请的一个电芯组的各个电芯的电极端子的连接方式的示意图。
图5示出了本申请的一个电芯的可选的结构示意图。
图6示出了本申请的一个第一固定件的可选的结构示意图。
图7示出了本申请的一个第二固定件的可选的结构示意图。
图8示出了图2中的Q1处的放大示意图。
图9示出了本申请的第三结构件沿第一方向上的长度小于第四结构件沿第一方向上的长度的示意图。
图10示出了本申请的第三结构件沿第一方向上的长度大于第四结构件沿第一方向上的长度的示意图。
图11示出了图8中的Q2处的截面的放大示意图。
图12示出了图1中的电化学装置的第三壁面的一个可选的结构示意图。
图13示出了图1中的电化学装置拆除第四壁面后的一个可选的结构示意图。
图14示出了本申请中的再一个可选的电化学装置的示意图。
图15示出了本申请中的再一个可选的电化学装置的电芯排列的示意图。
图16示出了本申请中的再一个可选的电化学装置的电芯排列的示意图。
图17示出了本申请的第二电极端子和第一电极端子形成连接的一个示意图。
图18示出了本申请的第二电极端子和第一电极端子形成连接的另一个示意图。
图19示出了图17的Q4处的放大示意图。
图20示出了本申请的第三固定件与电极端子之间的位置示意图。
图21示出了本申请的一个第三固定件的可选的结构示意图。
图22示出了图15的Q3处的放大示意图。
图23示出了图22的Q5处的截面的放大示意图。
图24示出了图14中的电化学装置的第三壁面的一个可选的结构示意图。
图25示出了图14中的电化学装置拆除第四壁面后的一个可选的结构示意图。
图26示出了本申请的一个可选的用电设备的结构示意图。
图27示出了本申请的第一方面提供的电化学装置的制备方法的一个可选的流程图。
图28示出了本申请的第二方面提供的电化学装置的制备方法的一个可选的流程图。
图29示出了本申请的第二方面提供的电化学装置的制备方法的一个可选的流程图。
附图标记说明:
100、电化学装置;200、用电设备;10、电芯组;101、电芯组的第一侧;102、电芯组的第二侧;1、电芯;11、电芯壳体;12、电极端子;1201、第一区段;1202、第二区段;13、电极组件;21、第一固定件;210、第一套筒;211、第一固定件的第一侧;212、第一固定件的第二侧;22、第二固定件;220、第二套筒;221、第二固定件的第一侧;222、第二固定件的第二侧;23、第三固定件;231、第三套筒;2311、第三套筒的第一侧;2312、第三套筒的第二侧;232、第四套筒;2321、第四套筒的第一侧;2322、第四套筒的第二侧;24、导电件;25、电极端子与导电件的连接区域;26、第一固定件与第二固定件的间距;27、正极连接端;28、负极连接端;29、相邻第三固定件之间的间距;4、外壳;401、第一壁面;402、第二壁面;403、第三壁面;404、第四壁面;41、第一凸部;42、第二凹部;43、第三凸部;44、第四凹部;45、第三凸部;46、第三凹部;47、第四凸部;48、第四凹部;5、弹性件;61、第一通孔;62、第二通孔;71、第五凸部;;F1、第一方向;F2、第二方向;F3、第三方向。
具体实施方式
为了使本领域的人员更好地理解本申请实施例中的技术方案,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本申请实施例一部分实施例,而不是全部的实施例。基于本申请实施例中的实施例,本领域普通技术人员所获得的所有其他实施例,都应当属于本申请实施例保护的范围。
下面结合附图说明本申请实施例的电化学装置及用电设备的具体实现。需要说明的是,下面各个附图中为便于进行示意,各结构未必是按照实际比例绘制的。
参照图1-图13所示,根据本申请的第一方面,提供了一种电化学装置100,其包括:N个电芯1、M个第一固定件21、M个第二固定件22和M-1个导电件24,其中,N、M均为正整数且2≤M≤N;N个电芯1被分成M个电芯组10,每个电芯组10包括至少一个电芯1,电芯组10内的电芯1沿第一方向F1设置,M个电芯组10沿第一方向F1设置。每个电芯1包括电芯壳体11和两个电极端子12,两个电极端子12相对设置于电芯壳体11沿第二方向F2上的两侧,其中,第二方向F2为一个电芯组10中第一固定件21和第二固定件22相对设置的方向, 且第二方向F2与第一方向F1垂直。沿第一方向F1,相邻两个电芯组10的电极端子12通过导电件24连接,且在导电件24上形成连接区域25。沿第二方向F2,电芯组10包括相对设置的第一侧101和第二侧102,其中,第一固定件21与该电芯组第一侧101的电极端子12的至少部分粘接,第一固定件21与靠近该电芯组第一侧101的连接区域25的至少部分粘接。第一固定件21有利于对电芯1的电极端子12提供保护,并且有利于对电极端子和导电件上形成的连接区域25提供保护。和/或,第二固定件22与该电芯组第二侧102的电极端子12的至少部分粘接,第二固定件22与靠近该电芯组第二侧102的连接区域25的至少部分粘接。第二固定件22有利于对电芯1的电极端子12提供保护,并且有利于对电极端子和导电件上形成的连接区域25提供保护。
在一些实施例中,每个电芯包括电极组件13、电芯壳体11和电极端子12,电极组件13设置于电芯壳体11内,电极端子12连接于电极组件13并延伸出电芯壳体11外。电极端子12包括两个,其中一个为正电极端子,另外一个为负电极端子。可选的,沿第二方向F2,正电极端子和负电极端子设于电芯壳体11的同一端。可选的,沿第二方向F2,正电极端子和负电极端子设于电芯壳体11的相对的两端,本说明书以正电极端子和负电极端子设于电芯壳体11的相对的两端为例说明。
参照图5所示,电极端子12包括位于电芯壳体11内的第一区段1201和位于电芯壳体11外的第二区段1202,第一区段1201连接在电极组件13上。
在一些实施例中,电极组件13可以包括正极极片、负极极片、隔离膜,隔离膜位于正极极片以及负极极片之间,电极组件13可以是由正极极片、隔离膜、负极极片卷绕而成,也可以是由正极极片、隔离膜、负极极片叠置制成。正极极片、隔离膜、负极极片的相关内容可以参照相关技术,本申请中不对此进行任何限定。示例地,正极极片可以包括正极活性材料层、正极集流体,正极活性材料层设置在正极集流体上,例如正极活性材料层可以是涂覆在正极集流体上,正极集流体的边缘存在空白箔材区,电极端子12连接在空白箔材区上,例如该电极端子12可以作为正极电极端子或者采样用的电极端子。示例地,负极极片可以包括负极活性材料层、负极集流体,负极活性材料层设置在负极集流体上,例如负极活性材料层可以是涂覆在负极集流体上,负极集流体的边缘存在空白箔材区,电极端子12电连接在空白箔材区上,例如该电极端子12可以作为负极电极端子或者采样用的电极端子。
在一些实施例中,在同一个电芯组10中,沿第一方向F1,第一固定件21的投影与该电芯组10中的电芯1的电极组件13的投影相离,有利于降低第一固定件21对电极组件13膨胀的影响。
在一些实施例中,在同一个电芯组10中,沿第一方向F1,第二固定件22的投影与该电芯组10中的电芯1的电极组件13的投影相离,有利于降低第二固定件22对电极组件13膨胀的影响。
下面对本申请实施例中第一方面提供的电化学装置100进行详细说明,可以理解的是,下文中所述的内容并不作为对本申请实施例中的任何限制。
本申请中第一方面提供的电化学装置100可以是二次电池,其种类可以是但不限于锂离子电池、钠离子电池、铅蓄电池等。
参照图1和图2所示,其示出了第一方向F1的示意图,电化学装置100的电芯组10的数量M≥2,每个电芯组10中的电芯1的数量都大于1的情况,可以参照图2理解,其中每个电芯组10内的电芯1沿第一方向F1依次堆叠设置,M个电芯组10沿第一方向F1依次设置,其余情况可以以此类推,在此不再赘述。可选地,导电件24的数量为M-1个。示例性地,在图2中,M=8,N=16,每个电芯组10中均包括2个电芯1,导电件24共7个(即M-1个),当然这并不作为对本申请的限制。
在一些实施例中,本申请中可以是M个第一固定件21分别位于M个电芯组10的第一侧101,并与每个电芯组10的第一侧101的电极端子12的至少部分粘接,一个第一固定件21位于一个电芯组10的第一侧101。M个第二固定件22分别位于M个电芯组10的第二侧102,并与每个电芯组10的第二侧102的电极端子12的至少部分粘接,一个第二固定件22位于一个电芯组10的第二侧102。
在一些实施例中,第一固定件21包覆每个电极端子12的第二区段1202,提升对电极端子11的保护。
在一些实施例中,第二固定件22包覆每个电极端子12的第二区段1202,提升对电极端子11的保护。
在一些实施例中,第一固定件21包覆电芯壳体的至少部分,提升对电芯壳体的保护。
在一些实施例中,第二固定件22包覆电芯壳体的至少部分,提升对电芯壳体的保护。
在一些实施例中,相邻的两个电芯组10的电极端子12和导电件24通过焊接连接,并在导电件24上形成连接区域,焊接方式在此不进行限制,例如激光焊接、超声波焊接。
在一些实施例中,相邻的两个电芯组10的电极端子12连接后通过其他的导电件和导电件24通过焊接连接。
在一些实施例中,两个电芯组10的电极端子12和导电件24通过导电胶连接,即将两个电芯组10的各至少一个电极端子12分别通过导电胶粘在导电件24上,以通过导电件24连接,并在导电件24上形成连接区域25。
在一些实施例中,两个电芯组10的电极端子12和导电件24通过机械结构连接,电极端子12和导电件24的其中一个设有凹部,另外一个设有凸部,凹部和凸部连接,并在导电件24上形成连接区域25。
在一些实施例中,电芯1的两个电极端子12其中一个为正电极端子,另外一个为负电极端子,本申请中的电化学装置100的N个电芯1通过彼此之间串联或者并联,最终由至少一个电芯1的正电极端子形成电化学装置100的正极,由至少一个电芯1的负电极端子形成电化学装置100的负极。
在一些实施例中,电芯1的电极端子12的数量大于两个,至少一个电极端子12可以用于电芯的物理参数(电 压、电流等)采样,例如其可以与电池管理系统电连接。
在一些实施例中,第一固定件21通过注塑成型工艺或灌注工艺设于电芯组10的第一侧101以及导电件24处,以与靠近该电芯组10的第一侧101的连接区域25、电极端子11的第二区段1202、电芯壳体11的至少部分粘接,提升对电极端子12和导电件24上形成的连接区域25的保护。在一些实施例中,第二固定件22通过注塑成型工艺或灌注工艺设于电芯组10的第二侧102以及导电件24处,以与靠近该电芯组10的第二侧102的连接区域25、电极端子11的第二区段1202、电芯壳体11的至少部分粘接,提升对电极端子12和导电件24上形成的连接区域25的保护。
在一些实施例中,注塑成型可以通过注塑装置将绝缘材料熔化,使融化的绝缘材料包覆电芯组10和导电件24,绝缘材料固化后形成第一固定件21或第二固定件22,以形成粘接。
在一些实施例中,第一固定件21的注塑成型工艺包括:先将沿第一方向F1相邻的两个电芯组10的各至少一个电极端子12通过导电件24连接,例如通过将两个电芯组10的电极端子12焊接在导电件24上以形成连接,再在电芯组10的第一侧101以及导电件24处进行注塑,电极端子12和导电件24上形成的连接区域25、电极端子12的第二区段1202、电芯壳体11的至少部分被绝缘材料包覆,绝缘材料固化后形成第一固定件21,进而使得注塑成型的第一固定件21的结构更加稳定,有利于提高保护效果。
在一些实施例中,第二固定件22的注塑成型工艺包括:先将沿第一方向F1相邻的两个电芯组10的各至少一个电极端子12通过导电件24连接,例如通过将两个电芯组10的电极端子12焊接在导电件24上以形成连接,再在电芯组10的第二侧102以及导电件24处进行注塑,电极端子12和导电件24上形成的连接区域25、电极端子12的第二区段1202、电芯壳体11的至少部分被绝缘材料包覆,绝缘材料固化后形成第二固定件22,进而使得注塑成型的第二固定件22的结构更加稳定,有利于提高保护效果。
在一些实施例中,可以通过灌注的工艺使绝缘材料(例如可流动的绝缘材料)包覆电芯组10和导电件24,绝缘材料固化后形成第一固定件21或第二固定件22,以形成粘接。可选的,绝缘材料包括灌封胶。
在一些实施例中,每个第一固定件21的形状和结构可以相同,或者也可以不同,在此不进行限制。每个第二固定件22的形状和结构可以相同,或者也可以不同,在此不进行限制。在一些实施例中,每个电芯组10中可以只有一个电芯1。在一些实施例中,每个电芯组10可以包括至少一个电芯1,但每个电芯组10中的电芯1的具体数量在此不进行限制。例如,每个电芯组10中的电芯1的数量可以均相等;或者,每个电芯组10中的电芯1的数量可以均不相等;又或者,部分电芯组10中的电芯1的数量相等。
本申请中,若某个电芯组10内包括多个电芯1时,可以将该电芯组10内的各个电芯1的各个电极端子12连接起来(例如通过焊接的方式),之后再将各个电芯组10的连接后的电极端子12依次进行连接(例如通过焊接的方式),以便于相邻的电芯组10之间形成串联或并联。
下面举几个例子便于理解本申请中的电化学装置100的N个电芯1、M个电芯组10、M个第一固定件21、M个第二固定件22和M-1个导电件24。应理解,以下例子1.1-1.3并不作为对本申请中的任何限制。
例子1.1:本申请中2≤M≤N,当2=M=N时,在这个例子1.1中,电化学装置100包括2个电芯1、2个第一固定件21、2个第二固定件22、1个导电件24,该2个电芯1分为2个电芯组10,每个电芯组10均包括1个电芯1,第一固定件21设置于该电芯组10的第一侧101,并与该电芯组10的第一侧101的电极端子12的至少部分粘接,不同的第一固定件21设置于不同的电芯组10的第一侧101;第二固定件22设置于该电芯组10的第二侧102,并与该电芯组10的第二侧102的电极端子12的至少部分粘接,不同的第二固定件22设置于不同的电芯组10的第二侧102。该1个导电件24将其中一个电芯组10的第一侧101的电极端子12与另外一个电芯组10的第二侧102的电极端子12连接,并在导电件24上形成连接区域25,1个第一固定件21与连接区域25的至少部分粘接,1个第二固定件22与连接区域25的至少部分粘接。
例子1.2:本申请中2≤M≤N,例如在这个例子1.2中,电化学装置100包括4个电芯1、2个第一固定件21、2个第二固定件22、1个导电件24,该4个电芯1分为2个电芯组(即N=4、M=2时),2个电芯组中的电芯1的数量分别为2个、2个。每个电芯组10内的电芯1沿第一方向F1依次堆叠设置,2个电芯组10沿第一方向F1依次设置;每个第一固定件21设置于一个电芯组10的第一侧101,并与该电芯组10的第一侧101的至少一个电极端子12的至少部分粘接,不同的第一固定件21设置于不同的电芯组10的第一侧101;第二固定件22设置于该电芯组10的第二侧102,并与该电芯组10的第二侧102的至少一个电极端子12的至少部分粘接,不同的第二固定件22设置于不同的电芯组10的第二侧102。该1个导电件24将其中一个电芯组10的第一侧101的电极端子12与另外一个电芯组10的第二侧102的电极端子12连接,并在导电件24上形成连接区域25,1个第一固定件21与连接区域25的至少部分粘接,1个第二固定件22与连接区域25的至少部分粘接。
例子1.3:本申请中2≤M≤N时,例如在这个例子1.3中,电化学装置100包括4个电芯1、3个第一固定件21、3个第二固定件22、2个导电件24,该4个电芯1分为3个电芯组(即N=4、M=3时),3个电芯组中的电芯1的数量分别为2个、1个、1个;每个电芯组10内的电芯1沿第一方向F1设置,3个电芯组10沿第一方向F1依次设置;每个第一固定件21设置于一个电芯组10的第一侧101,并与该电芯组10的第一侧101的电极端子12的至少部分粘接,不同的第一固定件21设置于不同的电芯组10的第一侧101;每个第二固定件22设置于一个电芯组10的第二侧102,并与该电芯组10的第二侧102的电极端子12的至少部分粘接,不同的第二固定件22设置于不同的电芯组10的第二侧102。其中一个导电件24将第一个电芯组10的第一侧101的电极端子 12以及第二个电芯组10的第二侧102的电极端子12连接,并在该导电件24上形成连接区域25,第一个电芯组10的第一固定件21与第二个电芯组10的第二固定件22与该连接区域25的至少部分粘接;另一个导电件24将第二个电芯组10的第一侧101的电极端子12以及第三个电芯组10的第二侧的电极端子12连接,并在该导电件24上形成连接区域25,第二个电芯组10的第一固定件21与第三个电芯组10的第二固定件22与该连接区域25的至少部分粘接。
显然,本领域技术人员通过上述例子1.1-1.3可以类推本申请的电化学装置100的其他情形,因此在此不再进行赘述。
在一些实施例中,至少一个电芯组10包括多个电芯1,在该电芯组10的第一侧101,多个电芯1中的至少一个电芯1的至少一个电极端子12呈弯折状。
在一些实施例中,至少一个电芯组10包括多个电芯1,在该电芯组10的第二侧102,多个电芯1中的至少一个电芯1的至少一个电极端子12呈弯折状。
参照图4所示,其示出了一个电芯组10包括两个电芯1的情况,其中,在该电芯组10的第一侧101,两个电芯1中的每个电芯1的至少一个电极端子12呈弯折状,弯折状的电极端子12通过焊接形成第一电极端子连接组件121;在该电芯组10的第二侧102,两个电芯1中的每个电芯1的至少一个电极端子12呈弯折状,弯折状的电极端子12通过焊接形成连接。
在一些实施例中,一个电芯组10包括三个电芯1的情况,在该电芯组10的第一侧101,三个电芯1中的靠外侧的两个电芯1的至少一个电极端子12呈弯折状,中间的电芯1的电极端子12不呈弯折状,三个电芯1的电极端子12通过焊接形成连接;在该电芯组10的第二侧102,三个电芯1中的靠外侧的两个电芯1的至少一个电极端子12呈弯折状,中间的电芯1的电极端子12不呈弯折状,三个电芯1的电极端子12通过焊接形成连接。应理解,这并不作为对本申请中的任何限制。
在一些实施例中,相邻的两个电芯组10中,其中一个电芯组10的第一固定件21和另外一个电芯组10的第二固定件22连接,沿第一方向F1,第一固定件21和第二固定件22形成间距26,有利于提升电芯组10的散热。可选的,第一固定件21和第二固定件22的一个设置有凸部,通过凸部使得第一固定件21和第二固定件22形成间距26。如图11所示,所述间距26的长度用T4示出。可选的,第一固定件21和第二固定件22中的一个设置有凸部,第一固定件21和第二固定件22中的另一个设置有凹部,其中,沿第一方向F1,凸部的长度大于凹部的长度,通过凸部和凹部的配合使得第一固定件21和第二固定件22形成间距26,提升相邻的两个电芯组10的连接稳定性。可选的,第一固定件21包括凸部和凹部,第二固定件22包括凸部和凹部,通过凸部和凹部的配合使得第一固定件21和第二固定件22形成间距26,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,沿第一方向F1,电芯组10包括相对的第一侧1001和第二侧1002,第一固定件21包括第一凸部41和第一凹部42,第二固定件22包括第二凸部43和第二凹部44,第一凸部41和第二凸部43位于第一侧1001,第一凹部42和第二凹部44位于第二侧1002。相邻的两个电芯组10,第一凸部41设于第二凹部44,第二凸部43设于第一凹部42,其中,沿第一方向F1,第一凸部41的长度大于第二凹部44的长度,第二凸部43的长度大于第一凹部42的长度,通过凸部和凹部的配合使得第一固定件21和第二固定件22形成间距26,有利于提升电芯组10的散热。可选的,其中,沿第一方向F1,第一凸部41的长度等于第二凹部44的长度,第二凸部43的长度等于第一凹部42的长度,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,如图2所示,沿第一方向F1,电芯组10包括相对的第一侧1001和第二侧1002,第一固定件21包括第一凸部41和第一凹部42,第二固定件22包括第二凸部43和第二凹部44,第一凸部41和第二凹部44位于第一侧1001,第一凹部42和第二凸部43位于第二侧1002,相邻的两个电芯组10,第二凸部43设于第一凹部42,其中,沿第一方向F1,第二凸部43的长度大于第一凹部42的长度,通过第二凸部43和第一凹部42的配合使得第一固定件21和第二固定件22形成间距26,有利于提升电芯组10的散热。可选的,其中,沿第一方向F1,第二凸部43的长度等于第一凹部42的长度,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,第一固定件21包括第一套筒210。在一些实施例中,沿第一方向F1,第一套筒210的壁厚满足大于等于1mm且小于等于5mm。可选地,第一套筒210的壁厚为1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm等,有利于提高对电极端子的保护效果。可选地,第一套筒210沿第一方向F1的壁厚如图11的T5所示。
在一些实施例中,第二固定件22包括第二套筒220。在一些实施例中,沿第一方向F1,第二套筒220的壁厚满足大于等于1mm且小于等于5mm。可选地,第二套筒220的壁厚为1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm等,有利于提高对电极端子的保护效果。可选地,第二套筒220沿第一方向F1的壁厚如图11的T5所示。
在一些实施例中,参照图2、图3所示,该电化学装置100还包括弹性件5,弹性件5设置于相邻的两个电芯组10之间,弹性件5与该两个电芯组10中的至少一个电芯组10连接。电芯组10对弹性件5进行压缩,弹性件5发生形变,从而对膨胀的电芯1提供变形空间。
可选地,弹性件5可以是以粘接的形式连接在电芯组10上,从而与该两个电芯组10中的至少一个接触。粘接可以是通过胶水、双面胶等结构进行粘接,在此不进行限制。
在一些实施例中,弹性件5包括泡棉。泡棉是塑料粒子发泡过的材料,泡棉具有弹性好、重量轻、快速压敏 固定、使用方便、弯曲自如、体积超薄、性能可靠等一系列特点。例如泡棉的种类包括PU泡棉,防静电泡棉,导电泡棉,EPE泡棉,防静电EPE泡棉,CR泡棉,EVA泡棉,架桥PE泡棉,SBR泡棉,EPDM泡棉等。本申请中不限制弹性件5包括泡棉时的种类。
在一些实施例中,弹性件5包括弹簧。例如,弹性件5包括第一板体、第二板体和弹簧,弹簧连接在第一板体和第二板体之间,第一板体连接在沿第一方向F1上相邻的两个电芯组10的一个电芯组10上,第二板体连接在该两个电芯组10的另一个电芯组10上。电芯1膨胀时带动第一板体和/或第二板体移动以压缩弹簧,弹簧形变并对膨胀的电芯1进行支撑,并对电芯1膨胀时产生的压力进行缓冲,并改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况。
在一些实施例中,如图11所示,该电化学装置100中,弹性件5在未被电芯压缩时的厚度为T1,沿第一方向F1,相邻的两个电芯组之间在第一方向F1上形成的间距为T2,电芯1在未经过充放电循环时的厚度为T3,沿第一方向F1上相邻的两个电芯组10中的电芯1数量之和的一半为X,则T1、T2、T3、X之间满足:T2-X*T3*20%≤T1≤T2。
具体地,对于X而言,其可以为整数,例如沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为2和2,则两者之和为4,因此X=4/2=2;又例如,沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为2和4,则两者之和为6,因此X=6/2=3;又例如,沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为1和1,则两者之和为2,因此X=2/2=1。或者其也可以为小数,例如沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为2和3,则两者之和为5,因此X=5/2=2.5。当然,这些示例并不作为对本申请中的限制。可以看出,沿第一方向F1上相邻的两个电芯组10的电芯1的数量仅有一个为奇数时X为小数,而其余情况下X为整数。
具体地,当T1=T2-X*T3*20%时,在电化学装置100的初始状态下,弹性件5可以仅与沿第一方向F1上相邻的两个电芯组10(分别记为第一个电芯组10和第二个电芯组10)的第一个电芯组10的电芯1接触;而在电芯组10的电芯1发生膨胀达到初始厚度的20%时,弹性件5开始与第二个电芯组10的电芯1接触,在后续膨胀过程中,弹性件5被压缩并对电芯1的膨胀进行支撑,从而降低电芯1的外包装(例如金属塑膜制成)因膨胀而发生撕裂的风险,以及对电芯1膨胀时产生的压力进行缓冲,并改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况,从而满足电化学装置100的使用需求。
而当T1=T2时,在电化学装置100的初始状态下,弹性件5可以同时与沿第一方向F1上相邻的两个电芯组10接触,在电芯组10的电芯1发生膨胀时,弹性件5被压缩并对膨胀的电芯1进行支撑,从而降低电芯1的外包装(例如金属塑膜制成)因膨胀而发生撕裂的风险,并对电芯1膨胀时产生的压力进行缓冲,并改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况,从而满足电化学装置100的使用需求。
可选地,T1、T2、T3、X之间满足:T2-X*T3*15%≤T1≤T2-X*T3*0.5%。
在一些实施例中,当T1=T2-X*T3*15%时,在电化学装置100的初始状态下,沿第一方向F1上弹性件5有一侧不与电芯组10的电芯1接触,在电芯组10的电芯1发生膨胀达到初始厚度的15%时,弹性件5可同时与其两侧的电芯组10的电芯1接触,而后弹性件5被压缩并对电芯1的膨胀进行支撑,从而降低电芯1的外包装(例如金属塑膜制成)因膨胀而发生撕裂的风险,以及对电芯1膨胀时产生的压力进行缓冲,改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况,从而满足电化学装置100的使用需求。
在一些实施例中,当T1=T2-X*T3*0.5%时,在电化学装置100的初始状态下,沿第一方向F1上弹性件5有一侧不与电芯组10的电芯1接触,在满足需求的情况下相对于弹性件5的两侧都与电芯1接触的情况(即T1=T2时)可降低成本,并且相对于弹性件5的两侧均与电芯1接触的情况来说,更有利于电芯1的散热。
在一些实施例中,参照图1和图12-13所示,电化学装置100还包括外壳4,外壳4包括沿第一方向F1相对设置的第一壁面401和第二壁面402。第一壁面401和M个电芯组10之间可以设置泡棉等弹性结构,第二壁面402和M个电芯组10之间可以设置泡棉等弹性结构,在此不进行限制。
在一些实施例中,外壳4包括沿第三方向F3相对设置的的第三壁面403和第四壁面404,第三方向F3垂直于第一方向F1和第二方向F2。第三壁面403和第四壁面404中至少一个设置有第五凸部71,沿第一方向F1,第五凸部71设于相邻的第一固定件21和第二固定件22之间,以限制电芯组10的移动。
在一些实施例中,参照图2所示,第一固定件21开设有至少一个第一通孔61,第一通孔61沿第三方向F3贯穿第一固定件21;和/或,第二固定件22开设有至少一个第一通孔61,第一通孔61沿第三方向F3贯穿第二固定件22;其中,第三方向F3垂直于第一方向F1和第二方向F2。有利于第一固定件21和/或第二固定件22所粘接的电极端子12处的散热。
在一些可选实施方式中,参照图1、图12所示,第三壁面403和/或第四壁面404开设有第二通孔62,第二通孔62与第一通孔61相通。本申请中通过这样的结构,可以进一步增强散热效果。
可以理解的是,以上内容仅是本申请实施例中的第一方面提供的电化学装置100的一些可选的实施例,其并不作为对本申请实施例中的任何限制。
根据本申请的第二方面,参照图14-图25所示,提供了一种电化学装置100,包括:N个电芯1、A个第一固定件21、A个第二固定件22、(L-1)*A个第三固定件23,其中,N、M、L均为正整数且2≤M≤N,L≥2;N个电芯1被分成M个电芯组10,所述M个电芯组被分为A行L列,沿第二方向F2,电芯组10包括相对设置的第一 侧101和第二侧102;每个电芯组10包括至少一个电芯1,电芯组10内的电芯1沿第一方向F1设置,第二方向F2与第一方向F1垂直;电芯1包括电芯壳体11和两个电极端子12,两个电极端子12相对设置于电芯壳体11沿第二方向F2上的两侧;其中,在一行电芯组A1中,第一固定件21位于该行电芯组A1中的第一个电芯组10的第一侧101,并与该第一个电芯组10第一侧101的电极端子12的至少部分粘接;第二固定件22位于该行电芯组A1中的最后一个电芯组10的第二侧102,并与该最后一个电芯组10的第二侧102的电极端子12的至少部分粘接;在一行电芯组A1中,相邻的两个电芯组10的电极端子12连接,第三固定件23分别与相邻的两个电芯组10连接,第三固定件23与该相邻的两个电芯组10中的一个电芯组10的第二侧102的电极端子12的至少部分粘接,且第三固定件23与该相邻的两个电芯组10中的另一个电芯组10的第一侧101的电极端子12的至少部分粘接。第一固定件21、第二固定件22、第三固定件23有利于提高对电芯组10的各个电极端子12的保护,提升电化学装置100的稳定性和使用寿命。
下面对本申请实施例中第二方面提供的电化学装置100进行详细说明,可以理解的是,下文中所述的内容并不作为对本申请实施例中的任何限制。
本申请中第二方面提供的电化学装置100可以是二次电池,其种类可以是但不限于锂离子电池、钠离子电池、铅蓄电池等。
在一些实施例中,每个电芯包括电极组件13、电芯壳体11和电极端子12,电极组件13设置于电芯壳体11内,电极端子12连接于电极组件13,并延伸出电芯壳体11外。电极端子12包括两个,其中一个为正电极端子,另外一个为负电极端子。可选的,沿第二方向F2,正电极端子和负电极端子设于电芯电芯壳体11的同一端。可选的,沿第二方向F2,正电极端子和负电极端子设于电芯电芯壳体11的相对的两端,本说明书以正电极端子和负电极端子设于电芯电芯壳体11的相对的两端为例说明。
参照图5所示,电极端子12包括位于电芯壳体11内的第一区段1201和位于电芯壳体11外的第二区段1202,第一区段1201连接在电极组件13上。
在一些实施例中,电极组件13可以包括正极极片、负极极片、隔离膜,隔离膜位于正极极片以及负极极片之间,电极组件13可以是由正极极片、隔离膜、负极极片卷绕而成,也可以是由正极极片、隔离膜、负极极片叠置制成。正极极片、隔离膜、负极极片的相关内容可以参照相关技术,本申请中不对此进行任何限定。示例地,正极极片可以包括正极活性材料层、正极集流体,正极活性材料层设置在正极集流体上,例如正极活性材料层可以是涂覆在正极集流体上,正极集流体的边缘存在空白箔材区,电极端子12连接在空白箔材区上,例如该电极端子12可以作为正极电极端子或者采样用的电极端子。示例地,负极极片可以包括负极活性材料层、负极集流体,负极活性材料层设置在负极集流体上,例如负极活性材料层可以是涂覆在负极集流体上,负极集流体的边缘存在空白箔材区,电极端子12电连接在空白箔材区上,例如该电极端子12可以作为负极电极端子或者采样用的电极端子。
在一些实施例中,在同一个电芯组10中,沿第一方向F1,第一固定件21的投影与该电芯组10中的电芯1的电极组件13的投影相离,减小第一固定件21对电极组件13膨胀的影响。如图16所示,电极组件13用虚线框表示。
在一些实施例中,在同一个电芯组10中,沿第一方向F1,第二固定件22的投影与该电芯组10中的电芯1的电极组件13的投影相离;减小第二固定件22对电极组件13膨胀的影响。如图16所示,电极组件13用虚线框表示。
在一些实施例中,在同一个电芯组10中,沿第一方向F1,第三固定件23的投影与该电芯组10中的电芯1的电极组件13的投影相离;减小第三固定件23对电极组件13膨胀的影响。如图16所示,电极组件13用虚线框表示。
在一些实施例中,参照图15所示,M=16,16个电芯组10排列成了偶数行电芯组,具体的,16个电芯组10排列成了8行电芯组,每行电芯组中包括2个电芯组10,8行电芯组沿第一方向F1堆叠设置。电化学装置100中包括8个第一固定件21、8个第二固定件22。沿第一方向F1,相邻的电芯组10通过导电件24连接,相邻两行电芯组10中,其中一个电芯组10的第一侧101的电极端子12与另一个电芯组10的第二侧102的电极端子12通过导电件24连接,且在导电件24上形成连接区域25,一个第一固定件21与该连接区域25的至少部分粘接,7个第一固定件21与7个连接区域25的至少部分粘接。沿第一方向F1,相邻的电芯组10通过导电件24连接,相邻两行电芯组10中,其中一个电芯组10的第一侧101的电极端子12与另一个电芯组10的第二侧102的电极端子12通过导电件24连接,且在导电件24上形成连接区域25,一个第二固定件22与该连接区域25的至少部分粘接,7个第二固定件22与7个连接区域的至少部分粘接。8行电芯组连接后形成一个正极连接端和一个负极连接端,一个第一固定件21与正极连接端27的电极端子12粘接,一个第二固定件22与负极连接端28的电极端子12粘接。
在一些实施例中,M=18,18个电芯组10排列成了奇数行电芯组,具体的,18个电芯组10排列成了9行电芯组,每行电芯组中包括2个电芯组10,9行电芯组沿第一方向F1堆叠设置。电化学装置100中包括9个第一固定件、9个第二固定件,9个第三固定件。沿第一方向F1,相邻的电芯组10通过导电件24连接,相邻两行电芯组10中,其中一个电芯组10的第一侧101的电极端子12与另一个电芯组10的第二侧102的电极端子12通过导电件24连接,且在导电件24上形成连接区域25,一个第一固定件21与该连接区域25的至少部分粘接,8 个第一固定件21与8个连接区域25的至少部分粘接。沿第一方向F1,相邻的电芯组10通过导电件24连接,相邻两行电芯组10中,其中一个电芯组10的第一侧101的电极端子12与另一个电芯组10的第二侧102的电极端子12通过导电件24连接,且在导电件24上形成连接区域25,一个第二固定件22与该连接区域25的至少部分粘接,8个第二固定件22与8个连接区域的至少部分粘接。9行电芯组连接后形成一个正极连接端和一个负极连接端,一个第二固定件22和一个第一固定件21的其中一个与正极连接端的电极端子12粘接,另外一个与负极连接端的电极端子12粘接。
请参阅图15,A行电芯组沿第一方向F1依次堆叠设置。以第一行电芯组A1和第二行电芯组A2为例进行说明。第一行电芯组A1和第二行电芯组A2沿第一方向F1堆叠设置,第一行电芯组A1包括至少2个沿第二方向F2排列的电芯组10,第二行电芯组A2包括至少2个沿第二方向F2排列的电芯组10,本说明书中,以第一行电芯组A1包括2个沿第二方向F2排列的电芯组10,第二行电芯组A2包括2个沿第二方向F2排列的电芯组10为例进行说明。
请参阅图15,第一行电芯组A1包括电芯组A1-1和电芯组A1-2,第二行电芯组A2包括电芯组A2-1和电芯组A2-2,沿第一方向F1,相邻的两个电芯组A1-1的电极端子12和电芯组A2-1的电极端子12通过导电件24连接,并在导电件24上形成连接区域25,连接方式包括激光焊接连接、超声波焊接连接。
在一些实施例中,沿第一方向F1,相邻的两个电芯组A1-2的电极端子12和电芯组A2-2的电极端子12通过导电件24连接,并在导电件24上形成连接区域25,连接方式包括激光焊接连接、超声波焊接连接。
在一些实施例中,电极端子12和导电件24通过机械结构连接,电极端子12和导电件24的其中一个设有凹部,电极端子12和导电件24的另外一个设有凸部,凹部和凸部连接,并在导电件24上形成连接区域25。
在一些实施例中,电极端子12和导电件24通过导电胶连接,将两个电芯组10的各至少一个电极端子12分别通过导电胶粘在导电件24上,以通过导电件24连接,并在导电件24上形成连接区域25。
在一些实施例中,相邻的两个电芯组10的电极端子12连接后通过其他的导电件和导电件24通过焊接连接。
在一些实施例中,电芯1的两个电极端子12其中一个为正电极端子,另外一个为负电极端子,本申请中的电化学装置100的N个电芯1通过彼此之间串联或者并联,最终由至少一个电芯1的正电极端子形成电化学装置100的正极,由至少一个电芯1的负电极端子形成电化学装置100的负极。
在一些实施例中,沿第一方向F1,相邻的两个电芯组10中,其中一个电芯组10的第一固定件21和另外一个电芯组10的第二固定件22连接,沿第一方向F1,第一固定件21和第二固定件22形成间距,有利于提升电芯组10的散热。可选的,第一固定件21和第二固定件22中的一个设置有凸部,通过凸部使得第一固定件21和第二固定件22形成间距26。可选的,第一固定件21和第二固定件22中的一个设置有凸部,第一固定件21和第二固定件22中的另一个设置有凹部,其中,沿第一方向F1,凸部的长度大于凹部的长度,通过凸部和凹部的配合使得第一固定件21和第二固定件22形成间距26,提升相邻的两个电芯组10的连接稳定性。可选的,第一固定件21包括凸部和凹部,第二固定件22包括凸部和凹部,通过凸部和凹部的配合使得第一固定件21和第二固定件22形成间距26,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,沿第一方向F1,电芯组10包括相对的第一侧1001和第二侧1002,第一固定件21包括第一凸部41和第一凹部42,第二固定件22包括第二凸部43和第二凹部44,第一凸部41和第二凸部位43于第一侧1001,第一凹部42和第二凹部44位于第二侧1002。相邻的两个电芯组10,第一凸部41设于第二凹部44,第二凸部43设于第一凹部42,其中,沿第一方向F1,第一凸部41的长度大于第二凹部44的长度,第二凸部43的长度大于第一凹部42的长度,通过凸部和凹部的配合使得第一固定件21和第二固定件22形成间距26,有利于提升电芯组10的散热。可选的,其中,沿第一方向F1,第一凸部长度等于第二凹部长度,第二凸部长度等于第一凹部长度,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,如图15-16所示,沿第一方向F1,电芯组10包括相对的第一侧1001和第二侧1002,第一固定件21包括第一凸部41和第一凹部42,第二固定件22包括第二凸部43和第二凹部44,第一凸部41和第二凹部44位于第一侧1001,第一凹部42和第二凸部43位于第二侧1002,相邻的两个电芯组10,第二凸部43设于第一凹部42,其中,沿第一方向F1,第二凸部43的长度大于第一凹部42的长度,通过第二凸部43和第一凹部42的配合使得第一固定件21和第二固定件22形成间距26,有利于提升电芯组10的散热。可选的,其中,沿第一方向F1,第二凸部43的长度等于第一凹部42的长度,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,沿第一方向F1,相邻的两个电芯组10中,其中一个电芯组10的第三固定件23和另外一个电芯组10的第三固定件23连接,沿第一方向F1,两个第三固定件23之间形成间距29,有利于提升电芯组10的散热。可选的,两个第三固定件23中的一个设置有凸部,通过凸部使得两个第三固定件23之间形成间距29。可选的,两个第三固定件23中的一个设置有凸部,两个第三固定件23中的另一个设置有凹部,其中,沿第一方向F1,凸部的长度大于凹部的长度,通过凸部和凹部的配合使得两个第三固定件23之间形成间距29,提升相邻的两个电芯组10的连接稳定性。可选的,两个第三固定件23均包括凸部和凹部,通过凸部和凹部的配合使得两个第三固定件23之间形成间距,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,沿第一方向F1,电芯组10包括相对的第一侧1001和第二侧1002,第三固定件23包括第三凸部45、第三凹部46,第四凸部47和第四凹部48,第三凸部45和第四凸部47位于第一侧1001,第三凹部46和第四凹部48位于第二侧1002。相邻的两个电芯组10,第三凸部45设于第四凹部48,第四凸部47设于第 三凹部46,其中,沿第一方向F1,第三凸部45的长度大于第四凹部48的长度,第四凸部47长度大于第三凹部46的长度,通过凸部和凹部的配合使得相邻两个第三固定件23之间形成间距29,有利于提升电芯组10的散热。可选的,其中,沿第一方向F1,第三凸部45的长度等于第四凹部48的长度,第四凸部47的长度等于第三凹部46的长度,进一步提升相邻的两个电芯组10的连接稳定性。如图23所示,所述间距29的长度用T7示出。
在一些实施例中,如图20所示,沿第一方向F1,电芯组10包括相对的第一侧1001和第二侧1002,第三固定件23包括第三凸部45、第三凹部46、第四凸部47和第四凹部48,第三凹部46和第四凸部47位于第一侧1001,第三凸部45和第四凹部48位于第二侧1002,相邻的两个电芯组10,一个电芯组的第四凸部47设于另一个电芯组10的第三凹部46,一个电芯组的第三凸部45设于另一个电芯组10的第四凹部48,其中,沿第一方向F1,第四凸部47的长度大于第三凹部46的长度,第三凸部45的长度大于第四凹部48的长度,通过第四凸部47和第三凹部46的配合以及第三凸部45和第四凹部48的配合,使得相邻两个第三固定件23之间形成间距29,有利于提升电芯组10的散热。可选的,其中,沿第一方向F1,第四凸部47长度等于第三凹部46的长度,进一步提升相邻的两个电芯组10的连接稳定性。
在一些实施例中,第一固定件21包括第一套筒210。在一些实施例中,沿第一方向F1,第一套筒210的壁厚满足大于等于1mm且小于等于5mm。可选地,第一套筒210的壁厚为1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm等,有利于提高对电极端子的保护效果。
在一些实施例中,第二固定件22包括第二套筒220。在一些实施例中,沿第一方向F1,第二套筒220的壁厚满足大于等于1mm且小于等于5mm。可选地,第二套筒220的壁厚为1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm等,有利于提高对电极端子的保护效果。
在一些实施例中,如图20所示,第三固定件23包括第三套筒231和第四套筒232。在一些实施例中,沿第一方向F1,第三套筒231的壁厚满足大于等于1mm且小于等于5mm。可选地,第三套筒231的壁厚为1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm等,有利于提高对电极端子的保护效果。在一些实施例中,沿第一方向F1,第四套筒232的壁厚满足大于等于1mm且小于等于5mm。可选地,第四套筒232的壁厚为1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm等,有利于提高对电极端子的保护效果。可选地,第三套筒231沿第一方向F1的壁厚如图23的T6所示。可选地,第四套筒232沿第一方向F1的壁厚如图23的T6所示。
在一些实施例中,第一固定件21通过注塑成型工艺或灌注工艺设于电芯组10的第一侧101以及导电件24处,以与靠近该电芯组10的第一侧101的连接区域25的至少部分粘接。提升对电极端子12和导电件24上形成的连接区域25的保护。
在一些实施例中,第一固定件21通过注塑成型工艺或灌注工艺设于电芯组10的第一侧101以及导电件24处,以与靠近该电芯组10的第一侧101的连接区域25、电极端子12的第二区段1202、电芯壳体11的至少部分粘接。提升对电极端子12和导电件24上形成的连接区域25的保护。
在一些实施例中,第二固定件22通过注塑成型工艺或灌注工艺设于电芯组10的第二侧102以及导电件24处,以与靠近该电芯组10的第二侧102的连接区域25的至少部分粘接。提升对电极端子12和导电件24上形成的连接区域25的保护。
在一些实施例中,第二固定件22通过注塑成型工艺或灌注工艺设于电芯组10的第二侧102以及导电件24处,以与靠近该电芯组10的第二侧102的连接区域25、电极端子12的第二区段1202、电芯壳体11的至少部分粘接。提升对电极端子12和导电件24上形成的连接区域25的保护。
在一些实施例中,第三固定件22通过注塑成型工艺或灌注工艺设于同一行中相邻电芯组10的第一侧101和第二侧102,以与相邻电芯组10相互连接的区域至少部分粘接,提升相邻电芯组10的第一侧101和第二侧102的结构强度,提升电芯组10的使用寿命。
在一些实施例中,第三固定件22通过注塑成型工艺或灌注工艺设于同一行中相邻电芯组10的第一侧101和第二侧102,将第二区段1202粘接及电芯壳体11的至少部分粘接。提升对电极端子12和导电件24上形成的连接区域25的保护。
在一些实施例中,注塑成型可以通过注塑装置将绝缘材料熔化,使融化的绝缘材料包覆电芯组10和导电件24,绝缘材料固化后形成第一固定件21或第二固定件22,以形成粘接。
在一些实施例中,第一固定件21的注塑成型工艺包括:先将沿第一方向F1相邻的两个电芯组10的各至少一个电极端子12通过导电件24连接,例如通过将两个电芯组10的电极端子焊接在导电件24上以形成连接,再在电芯组10的第一侧101以及导电件24处进行注塑,以与靠近该电芯组10的第一侧101的连接区域25、电极端子11的第二区段1202、电芯壳体11的至少部分粘接,材料固化后形成第一固定件21,进而使得注塑成型的第一固定件21的结构更加稳定,有利于提高保护效果。
在一些实施例中,第二固定件22的注塑成型工艺包括:先将沿第一方向F1相邻的两个电芯组10的各至少一个电极端子12通过导电件24连接,例如通过将两个电芯组10的电极端子焊接在导电件24上以形成连接,再在电芯组10的第二侧102以及导电件24处进行注塑,以与靠近该电芯组10的第二侧102的连接区域25、电极端子11的第二区段1202、电芯壳体11的至少部分粘接,材料固化后形成第二固定件22,进而使得注塑成型的第二固定件22的结构更加稳定,有利于提高保护效果。
在一些实施例中,注塑成型可以通过注塑装置将绝缘材料熔化,使融化的绝缘材料包覆相邻电芯组10的第 一侧101和第二侧102,绝缘材料固化后形成第三固定件23,以形成粘接。
在一些实施例中,第三固定件23的注塑成型包括制备工艺:先将同一行中相邻电芯组10的第一侧101和第二侧102的电极端子连接,例如通过焊接形成连接,再在第一侧101和第二侧102进行注塑,电极端子连接形成的连接区域被注塑材料包覆,材料固化后形成第三固定件22,第三固定件22包覆电极端子连接形成的连接区域的以及电极端子位于电芯壳体外的部分,有利于提高保护效果。
在一些实施例中,可以通过灌注的工艺使绝缘材料(例如可流动的绝缘材料)包覆电芯组10和导电件24,绝缘材料固化后形成第一固定件21或第二固定件22以形成粘接。可选的,绝缘材料包括灌封胶。
在一些实施例中,可以通过灌注的工艺使绝缘材料(例如可流动的绝缘材料)包覆相邻电芯组10的第一侧101和第二侧102,绝缘材料固化后形成第三固定件23以形成粘接。可选的,绝缘材料包括灌封胶。
在一些实施例中,每个第一固定件21的形状和结构可以相同,或者也可以不同,在此不进行限制。每个第二固定件22的形状和结构可以相同,或者也可以不同,在此不进行限制。
在一些实施例中,至少一个电芯组10包括多个电芯1,在该电芯组10的第一侧101,多个电芯1中的至少一个电芯1的至少一个电极端子1呈弯折状;和/或,至少一个电芯组10包括多个电芯1,在该电芯组10的第二侧102,多个电芯1中的至少一个电芯1的至少一个电极端子12呈弯折状。
可以参照前述第一方面提供的电化学装置100的相关内容进行理解,参照图17所示,其示出了一个电芯组10包括两个电芯1的情况,其中,在该电芯组10的第一侧101,两个电芯1中的每个电芯1的至少一个电极端子12呈弯折状,弯折状的电极端子12通过焊接形成连接并形成第一电极端子连接组件121;在该电芯组10的第二侧102,两个电芯1中的每个电芯1的至少一个电极端子12呈弯折状,弯折状的电极端子12通过焊接形成连接并形成第二电极端子连接组件122。参照图18所示,其示出了一个电芯组10包括三个电芯1的情况,在该电芯组10的第一侧101,三个电芯1中的靠外侧的两个电芯1的至少一个电极端子12呈弯折状,中间的电芯1的电极端子12不呈弯折状,三个电芯1的电极端子12通过焊接形成电连接;在该电芯组10的第二侧102,三个电芯1中的靠外侧的两个电芯1的至少一个电极端子12呈弯折状,中间的电芯1的电极端子12不呈弯折状,三个电芯1的电极端子12通过焊接形成电连接。应理解,这并不作为对本申请中的任何限制。
本申请中,在一些实施例中,参照图15所示,该电化学装置100还包括弹性件5;弹性件5设置于同一列电芯组10中的相邻的两个电芯组10之间,弹性件5与该两个电芯组10中的至少一个电芯组10接触。
在此实施例中,同一列电芯组10中的相邻的两个电芯组10是指同一列电芯组10中的沿第一方向F1上相邻的两个电芯组10。
具体地,本申请中还注意到,由于在电化学装置100的使用状态下,软包装的电芯1会因长时间的使用而发生膨胀,因此本申请实施例中通过在同一列电芯组10中的相邻的两个电芯组10之间设置弹性件5,并将弹性件5与两个电芯组10中的至少一个电芯组10接触,在电芯组10的电芯1膨胀时,电芯组10对弹性件5进行压缩,弹性件5发生形变,从而对膨胀的电芯1进行支撑,并对电芯1膨胀时产生的压力进行缓冲,并改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况。
可选地,弹性件5可以是以粘接的形式连接在电芯组10上,从而与该两个电芯组10中的至少一个接触。粘接可以是通过胶水、双面胶等结构进行粘接,在此不进行限制。
本申请中,可选地,可以在每一列电芯组10的相邻两个电芯组10中间均设置弹性件5。
在一些实施例中,弹性件5可以包括泡棉。泡棉是塑料粒子发泡过的材料,泡棉具有有弹性、重量轻、快速压敏固定、使用方便、弯曲自如、体积超薄、性能可靠等一系列特点。例如泡棉的种类可以包括PU泡棉,防静电泡棉,导电泡棉,EPE泡棉,防静电EPE泡棉,CR泡棉,EVA泡棉,架桥PE泡棉,SBR泡棉,EPDM泡棉等。本申请中不限制弹性件5包括泡棉时的种类,只要能够满足使用需求即可。
在一些实施例中,弹性件5可以包括弹簧。例如,弹性件5可以包括第一板体、第二板体和弹簧,弹簧连接在第一板体和第二板体之间,第一板体连接在同一列电芯组10中的沿第一方向F1上相邻的两个电芯组10的一个电芯组10上,第二板体连接在该两个电芯组10的另一个电芯组10上。电芯1膨胀时带动第一板体和/或第二板体移动以压缩弹簧,弹簧形变并对膨胀的电芯1进行支撑,并对电芯1膨胀时产生的压力进行缓冲,并改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况。
在一些实施例中,该电化学装置100中,所述弹性件在未被电芯压缩时的厚度为T1,同一列电芯组中的相邻的两个电芯组之间在第一方向上形成的间距为T2,电芯在未经过充放电循环时的厚度为T3,同一列电芯组中的相邻的两个电芯组中的电芯数量之和的一半为X,则T1、T2、T3、X之间满足:T2-X*T3*20%≤T1≤T2。
具体地,对于X而言,其可以为整数,例如沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为2和2,则两者之和为4,因此X=4/2=2;又例如,同一列电芯组中的沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为2和4,则两者之和为6,因此X=6/2=3;又例如,同一列电芯组中的沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为1和1,则两者之和为2,因此X=2/2=1。或者其也可以为小数,例如同一列电芯组中的沿第一方向F1上相邻的两个电芯组10的电芯1的数量分别为2和3,则两者之和为5,因此X=5/2=2.5。当然,这些示例并不作为对本申请中的限制。可以看出,同一列电芯组中的沿第一方向F1上相邻的两个电芯组10的电芯1的数量仅有一个为奇数时X为小数,而其余情况下X为整数。
具体地,当T1=T2-X*T3*20%时,在电化学装置100的初始状态下,弹性件5可以仅与同一列电芯组中的沿 第一方向F1上相邻的两个电芯组10(分别记为第一个电芯组10和第二个电芯组10)的第一个电芯组10的电芯1接触;而在电芯组10的电芯1发生膨胀达到初始厚度的20%时,弹性件5开始与第二个电芯组10的电芯1接触,在后续膨胀过程中,弹性件5被压缩并对电芯1的膨胀进行支撑,避免电芯1过度膨胀,从而降低电芯1的外包装(例如金属塑膜制成)因膨胀而发生撕裂的风险,以及对电芯1膨胀时产生的压力进行缓冲,并改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况,从而满足电化学装置100的使用需求。
而当T1=T2时,在电化学装置100的初始状态下,弹性件5可以同时与同一列电芯组中的沿第一方向F1上相邻的两个电芯组10接触,在电芯组10的电芯1发生膨胀时,弹性件5被压缩并对膨胀的电芯1进行支撑,避免电芯1过度膨胀,从而降低电芯1的外包装(例如金属塑膜制成)因膨胀而发生撕裂的风险,并对电芯1膨胀时产生的压力进行缓冲,并改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况,从而满足电化学装置100的使用需求。
可选地,T1、T2、T3、X之间满足:T2-X*T3*15%≤T1≤T2-X*T3*0.5%。
在一些实施例中,当T1=T2-X*T3*15%时,在电化学装置100的初始状态下,沿第一方向F1上弹性件5有一侧不与电芯组10的电芯1接触,在电芯组10的电芯1发生膨胀达到初始厚度的15%时,弹性件5可同时与其两侧的电芯组10的电芯1接触,而后弹性件5被压缩并对电芯1的膨胀进行支撑,避免电芯1过度膨胀,从而更好地降低电芯1的外包装(例如金属塑膜制成)因膨胀而发生撕裂的风险,以及对电芯1膨胀时产生的压力进行缓冲,更好地改善电化学装置100的各电芯1因发生膨胀而沿第一方向F1出现叠加位移的情况,从而满足电化学装置100的使用需求。
在一些实施例中,当T1=T2-X*T3*0.5%时,在电化学装置100的初始状态下,沿第一方向F1上弹性件5有一侧不与电芯组10的电芯1接触,在满足需求的情况下相对于弹性件5的两侧都与电芯1接触的情况(即T1=T2时)可降低成本,并且相对于弹性件5的两侧均与电芯1接触的情况来说,更有利于电芯1的散热。
在一些实施例中,参照图14和图24-25所示,电化学装置100还包括外壳4,外壳4包括沿第一方向F1相对设置的第一壁面401和第二壁面402。第一壁面401和M个电芯组10之间可以设置泡棉等弹性结构,第二壁面402和M个电芯组10之间可以设置泡棉等弹性结构,在此不进行限制。
在一些实施例中,外壳4包括沿第三方向F3相对设置的的第三壁面403和第四壁面404,第三方向F3垂直于第一方向F1和第二方向F2。第三壁面403和第四壁面404中至少一个设置有第五凸部71,沿第一方向F1,第五凸部71设于相邻的第一固定件21和第二固定件22之间,限制电芯组10的移动。
在一些实施例中,参照图16所示,第一固定件21开设有至少一个第一通孔61,第一通孔61沿第三方向F3贯穿第一固定件21;和/或,第二固定件22开设有至少一个第一通孔61,第一通孔61沿第三方向F3贯穿第二固定件22;其中,第三方向F3垂直于第一方向F1和第二方向F2。有利于第一固定件21和/或第二固定件22所粘接的电极端子12处的散热。
在一些实施例中,第三固定件23开设有至少一个第一通孔61,第一通孔61沿第三方向F3贯穿第三固定件23;和其中,第三方向F3垂直于第一方向F1和第二方向F2。有利于第三固定件23所粘接的电极端子12处的散热。
在一些可选实施方式中,参照图14、图24所示,第三壁面403和/或第四壁面404开设有第二通孔62,第二通孔62与第一通孔61相通。本申请中通过这样的结构,可以进一步增强散热效果。
可以理解的是,以上内容仅是本申请实施例中的第二方面提供的电化学装置100的一些可选的实施例,其并不作为对本申请实施例中的任何限制。
参照图26所示,根据本申请实施例中的第三方面,还提供了一种用电设备200,包括:如前述第一方面或第二方面提供的任一项的电化学装置100。
本申请实施例中的用电设备200中包括本申请实施例中提供的电化学装置100,该电化学装置100相对于现有技术中的电化学装置而言具备更高的安全性、稳定性和使用寿命,因此本申请实施例中的用电设备200具备更高的安全性、稳定性和使用寿命。
参照图27所示的流程图,根据本申请实施例中的第一方面的制备流程图,包括如下步骤:
步骤S101:将M个电芯组10的相邻两个电芯组10的电极端子12通过导电件24连接,且在导电件24上形成连接区域25;
步骤S102:将可流动的绝缘材料设于电芯组10的第一侧101以及导电件24处,绝缘材料固化后,将靠近该电芯组10的第一侧101的连接区域25、电极端子12位于电芯壳体外的部分、电芯壳体11的至少部分粘接形成第一固定件21;
步骤S103:将可流动的绝缘材料设于电芯组10的第二侧102以及导电件24处,绝缘材料固化后,将靠近该电芯组10的第二侧102的连接区域25、电极端子12位于电芯壳体外的部分、电芯壳体11的至少部分粘接形成第二固定件22。
在一些实施例中,步骤S102包括通过注塑成型工艺,通过注塑装置将绝缘材料熔化,使绝缘材料固化后形成第一固定件21。
在一些实施例中,步骤S102包括灌注工艺,可以通过灌注的工艺使可流动的绝缘材料固化后形成第一固定 件21。可选的,可流动的绝缘材绝缘材料包括灌封胶。
在一些实施例中,步骤S103包括通过注塑成型工艺,通过注塑装置将绝缘材料熔化,使绝缘材料固化后形成第二固定件22。
在一些实施例中,步骤S103包括灌注工艺,可以通过灌注的工艺使可流动的绝材料固化后形成第二固定件22。可选的,可流动的绝缘材绝缘材料包括灌封胶。
参照图28所示的流程图,根据本申请实施例中的第二方面的制备流程图,包括如下步骤:
步骤S201:将同一行电芯组10中相邻两个电芯组10的电极端子12连接,将可流动的绝缘材料设于相邻两个电芯组10的第一侧101和第二侧102,绝缘材料固化后,将电极端子12的第二区段1202、电芯壳体的至少部分粘接形成第三固定件23;
步骤S202:将可流动的绝缘材料设于该行电芯组10中的第一个电芯组10的第一侧101,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第一固定件21;
步骤S203:将可流动的绝缘材料设于该行电芯组10中的最后一个电芯组10的第二侧102,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第二固定件22。
在一些实施例中,步骤S201包括通过注塑成型工艺,通过注塑装置将绝缘材料熔化,使绝缘材料固化后形成第三固定件23。
在一些实施例中,步骤S201包括灌注工艺,可以通过灌注的工艺使可流动的绝缘材料固化后形成第三固定件23。可选的,可流动的绝缘材绝缘材料包括灌封胶。
在一些实施例中,步骤S202包括通过注塑成型工艺,通过注塑装置将绝缘材料熔化,使绝缘材料固化后形成第一固定件21。
在一些实施例中,步骤S202包括灌注工艺,可以通过灌注的工艺使可流动的绝缘材料固化后形成第一固定件21。可选的,可流动的绝缘材绝缘材料包括灌封胶。
在一些实施例中,步骤S203包括通过注塑成型工艺,通过注塑装置将绝缘材料熔化,使绝缘材料固化后形成第二固定件22。
在一些实施例中,步骤S203包括灌注工艺,可以通过灌注的工艺使可流动的绝缘材料固化后形成第二固定件22。可选的,可流动的绝缘材绝缘材料包括灌封胶。
参照图29所示的流程图,根据本申请实施例中的第二方面的制备流程图,还包括如下步骤:
步骤S204:提供M-1个导电件,将相邻两行电芯组中的其中一行电芯组中的第一个电芯组的第一侧的电极端子与另一行电芯组中的第一个电芯组的第二侧的电极端子通过导电件连接,且在导电件上形成连接区域25;
步骤S205:将可流动的绝缘材料设于电芯组的第一侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第一侧的连接区域25粘接;
步骤S206:将可流动的绝缘材料设于电芯组的第二侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第二侧的连接区域25粘接。
在一些实施例中,步骤S205包括通过注塑成型工艺,通过注塑装置将绝缘材料熔化,使绝缘材料固化后与连接区域粘接。
在一些实施例中,步骤S205包括灌注工艺,可以通过灌注的工艺使可流动的绝缘材料固化后与连接区域粘接。可选的,可流动的绝缘材绝缘材料包括灌封胶。
在一些实施例中,步骤S206包括通过注塑成型工艺,通过注塑装置将绝缘材料熔化,使绝缘材料固化后与连接区域粘接。
在一些实施例中,步骤S206包括灌注工艺,可以通过灌注的工艺使可流动的绝材料固化后与连接区域粘接。可选的,可流动的绝缘材绝缘材料包括灌封胶。
本文使用的术语“包括”及其变形是开放性包括,即“包括但不限于”。术语“基于”是“至少部分地基于”。术语“一个实施例”表示“至少一个实施例”;术语“另一实施例”表示“至少一个另外的实施例”;术语“一些实施例”表示“至少一些实施例”。需要注意,本申请中提及的“第一”、“第二”等概念仅用于对不同的装置、模块或单元进行区分,并非用于限定这些装置、模块或单元所执行的功能的顺序或者相互依存关系。需要注意,本申请中提及的“一个”、“多个”的修饰是示意性而非限制性的,本领域技术人员应当理解,除非在上下文另有明确指出,否则应该理解为“一个或多个”。
本领域技术人员在考虑说明书及实践这里申请的发明后,将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未申请的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的,本申请的真正范围和精神由所附的权利要求指出。
最后应说明的是:以上实施例仅用以说明本申请实施例的技术方案,而非对其限制;尽管参照前述实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (22)

  1. 一种电化学装置,其特征在于,包括:N个电芯、M个第一固定件、M个第二固定件和M-1个导电件,其中,N、M均为正整数且2≤M≤N;
    所述N个电芯被分成M个电芯组,每个电芯组包括至少一个电芯,所述电芯组内的电芯沿第一方向设置,所述M个电芯组沿第一方向设置;
    所述电芯包括电芯壳体和两个电极端子,两个电极端子相对设置于所述电芯壳体沿第二方向上的两侧,其中,所述第二方向为所述第一固定件和所述第二固定件相对设置的方向,且所述第二方向与所述第一方向垂直;
    沿所述第一方向,相邻两个电芯组的电极端子通过导电件连接,且在所述导电件上形成连接区域;
    沿所述第二方向,所述电芯组包括相对设置的第一侧和第二侧,其中,所述第一固定件与该电芯组第一侧的电极端子的至少部分粘接,且至少一个第一固定件与所述连接区域的至少部分粘接;
    和/或,所述第二固定件与该电芯组第二侧的电极端子的至少部分粘接,且至少一个第二固定件与所述连接区域的至少部分粘接。
  2. 根据权利要求1所述的电化学装置,其特征在于,
    至少一个电芯组包括多个电芯,在该电芯组的第一侧,所述多个电芯中的每个电芯的电极端子相互连接;和/或,
    至少一个电芯组包括多个电芯,在该电芯组的第二侧,所述多个电芯中的每个电芯的电极端子相互连接。
  3. 根据权利要求1所述的电化学装置,其特征在于,
    相邻两个电芯组中,一个所述电芯组的所述第一固定件与另一个所述电芯组的所述第二固定件连接,所述第一固定件和所述第二固定件在所述第一方向上形成间距。
  4. 根据权利要求3所述的电化学装置,其特征在于,沿所述第一方向,所述第一固定件和所述第二固定件中的一个设有凸部,所述第一固定件和所述第二固定件通过所述凸部形成间距。
  5. 根据权利要求4所述的电化学装置,其特征在于,沿所述第一方向,所述第一固定件和所述第二固定件中的另一个设有凹部,所述凸部沿所述第一方向的长度大于所述凹部沿所述第一方向的长度,所述第一固定件和所述第二固定件通过所述凸部和所述凹部的配合形成间距。
  6. 根据权利要求1所述的电化学装置,其特征在于,
    所述电芯还包括电极组件,所述电极组件设置于所述电芯壳体内,所述两个电极端子连接于所述电极组件并伸出所述电芯壳体;
    在同一个电芯组中,沿所述第一方向,所述第一固定件的投影与该电芯组中的电芯的电极组件的投影相离;和/或,
    在同一个电芯组中,沿所述第一方向,所述第二固定件的投影与该电芯组中的电芯的电极组件的投影相离。
  7. 根据权利要求1所述的电化学装置,其特征在于,
    至少一个所述第一固定件通过注塑工艺成型于所述电芯组的第一侧以及所述连接区域的至少部分;和/或,
    至少一个所述第二固定件通过注塑工艺成型于所述电芯组的第二侧以及所述连接区域的至少部分。
  8. 根据权利要求7所述的电化学装置,其特征在于,所述第一固定件包覆所述电极端子位于所述电芯壳体外的部分和所述电芯壳体的至少部分;和/或,
    所述第二固定件包覆所述电极端子位于所述电芯壳体外的部分和所述电芯壳体的至少部分。
  9. 根据权利要求1所述的电化学装置,其特征在于,
    所述第一固定件开设有至少一个第一通孔,所述第一通孔沿第三方向贯穿所述第一固定件;和/或,
    所述第二固定件开设有至少一个第一通孔,所述第一通孔沿第三方向贯穿所述第二固定件,其中,所述第三方向垂直于所述第一方向和所述第二方向。
  10. 根据权利要求9所述的电化学装置,其特征在于,
    所述电化学装置还包括外壳;所述外壳包括沿所述第三方向相对设置的第三壁面和第四壁面;
    所述第三壁面和/或所述第四壁面上开设有第二通孔,所述第二通孔与所述第一通孔相通。
  11. 一种电化学装置,其特征在于,包括:N个电芯、A个第一固定件、A个第二固定件、(L-1)*A个第三固定件,其中,N、M、L均为正整数且2≤M≤N,L≥2;
    所述N个电芯被分成M个电芯组,所述M个电芯组被分为A行L列,沿第二方向,所述电芯组包括相对设置的第一侧和第二侧;
    每个所述电芯组包括至少一个电芯,所述电芯组内的电芯沿第一方向设置,所述第二方向与所述第一方向垂直;
    所述电芯包括电芯壳体和两个电极端子,两个电极端子相对设置于所述电芯壳体沿所述第二方向上的两侧;
    其中,在一行电芯组中,所述第一固定件位于该行电芯组中的第一个电芯组的第一侧,并与该第一个电芯组第一侧的电极端子的至少部分粘接;所述第二固定件位于该行电芯组中的最后一个电芯组的第二侧,并与该最后一个电芯组第二侧的电极端子的至少部分粘接;
    在一行电芯组中,相邻的两个电芯组的电极端子连接,所述第三固定件分别与相邻的两个电芯组连接,所述第三固定件与该相邻的两个电芯组中的一个电芯组的第二侧的电极端子的至少部分粘接,且所述第三固定件与该相邻的两个电芯组中的另一个电芯组的第一侧的电极端子的至少部分粘接。
  12. 根据权利要求11所述的电化学装置,其特征在于;
    所述A行电芯组沿所述第一方向依次堆叠设置;
    所述电化学装置还包括A-1个导电件;
    相邻的两行电芯组中,其中一行电芯组中的第一个电芯组的第一侧的电极端子与另一行电芯组中的第一个电芯组的第二侧的电极端子通过所述导电件连接,且在所述导电件上形成连接区域,至少一个所述第一固定件与该连接区域的至少部分粘接,和/或,至少一个所述第二固定件与该连接区域的至少部分粘接。
  13. 根据权利要求12所述的电化学装置,其特征在于,
    至少一个所述第一固定件通过注塑工艺成型于该行电芯组中的第一个电芯组的第一侧以及所述连接区域的至少部分;和/或,
    至少一个所述第二固定件通过注塑工艺成型于该行电芯组中的最后一个电芯组的第二侧以及所述连接区域的至少部分;和/或,
    在一行电芯组中相邻的两个电芯组,至少一个所述第三固定件通过注塑工艺成型于一个电芯组的第二侧以及另一个电芯组的第一侧。
  14. 根据权利要求13所述的电化学装置,其特征在于,
    所述第一固定件包覆所述电极端子位于所述电芯壳体外的部分和所述电芯壳体的至少部分;和/或,
    所述第二固定件包覆所述电极端子位于所述电芯壳体外的部分和所述电芯壳体的至少部分;和/或,
    所述第三固定件包覆所述电极端子位于所述电芯壳体外的部分和所述电芯壳体的至少部分。
  15. 根据权利要求11-13任一项所述的电化学装置,其特征在于,
    所述第一固定件开设有至少一个第一通孔,所述第一通孔沿第三方向贯穿所述第一固定件;和/或,
    所述第二固定件开设有至少一个第一通孔,所述第一通孔沿第三方向贯穿所述第二固定件;和/或,
    所述第三固定件开设有至少一个第一通孔,所述第一通孔沿第三方向贯穿所述第三固定件;
    其中,所述第三方向垂直于所述第一方向和所述第二方向。
  16. 根据权利要求15所述的电化学装置,其特征在于,
    沿所述第一方向,相邻的两个电芯组中,其中一个所述电芯组中的所述第一固定件与另一个所 述电芯组的所述第二固定件连接,所述第一固定件和所述第二固定件在所述第一方向上形成间距;
    和/或,
    沿所述第一方向,相邻的两个电芯组中,其中一个所述电芯组的所述第三固定件与另外一个所述电芯组的所述第三固定件连接,两个所述第三固定件在所述第一方向上形成间距。
  17. 根据权利要求15所述的电化学装置,其特征在于,
    所述电芯还包括电极组件,所述电极组件设置于所述电芯壳体内,所述两个电极端子连接于所述电极组件并伸出所述电芯壳体;
    在同一个电芯组中,沿所述第一方向,所述第一固定件的投影与该电芯组中的电芯的电极组件的投影相离;和/或,
    在同一个电芯组中,沿所述第一方向,所述第二固定件的投影与该电芯组中的电芯的电极组件的投影相离;和/或,
    在同一行电芯组中,沿所述第一方向,相邻的两个电芯组之间的所述第三固定件的投影与该两个电芯组中的电芯的电极组件的投影相离。
  18. 根据权利要求15所述的电化学装置,其特征在于,
    所述电化学装置还包括外壳,所述外壳包括沿第三方向相对设置的第三壁面以及第四壁面;
    所述第三壁面和/或所述第四壁面上开设有第二通孔,所述第二通孔与所述第一通孔相通。
  19. 一种用电设备,其特征在于,包括:如权利要求1-18中任一项所述的电化学装置。
  20. 一种如权利要求1-10任一项所述的电化学装置的制备方法,其特征在于,所述方法包括:
    步骤S101:将M个电芯组的相邻两个电芯组的电极端子通过导电件连接,且在导电件上形成连接区域;
    步骤S102:将可流动的绝缘材料设于电芯组的第一侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第一侧的连接区域、电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第一固定件;
    步骤S103:将可流动的绝缘材料设于电芯组的第二侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第二侧的连接区域、电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第二固定件。
  21. 一种如权利要求11-18任一项所述的电化学装置的制备方法,其特征在于,所述方法包括:
    步骤S201:将同一行电芯组中相邻两个电芯组的电极端子连接,将可流动的绝缘材料设于相邻两个电芯组的第一侧和第二侧,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第三固定件;
    步骤S202:将可流动的绝缘材料设于该行电芯组中的第一个电芯组的第一侧,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第一固定件;
    步骤S203:将可流动的绝缘材料设于该行电芯组中的最后一个电芯组的第二侧,绝缘材料固化后,将电极端子位于电芯壳体外的部分、电芯壳体的至少部分粘接形成第二固定件。
  22. 根据权利要求21所述的方法,其特征在于,所述方法还包括:
    步骤S204:提供M-1个导电件,将相邻两行电芯组中的其中一行电芯组中的第一个电芯组的第一侧的电极端子与另一行电芯组中的第一个电芯组的第二侧的电极端子通过导电件连接,且在导电件上形成连接区域;
    步骤S205:将可流动的绝缘材料设于电芯组的第一侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第一侧的连接区域粘接;
    步骤S206:将可流动的绝缘材料设于电芯组的第二侧以及导电件处,绝缘材料固化后,将靠近该电芯组的第二侧的连接区域粘接。
PCT/CN2022/130553 2022-11-08 2022-11-08 电化学装置、用电设备及电化学装置的制备方法 Ceased WO2024098241A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2025525732A JP2025539241A (ja) 2022-11-08 2022-11-08 電気化学装置、電気化学装置の製造方法、並びに電力消費機器
CN202280017707.6A CN116941077A (zh) 2022-11-08 2022-11-08 电化学装置、用电设备及电化学装置的制备方法
PCT/CN2022/130553 WO2024098241A1 (zh) 2022-11-08 2022-11-08 电化学装置、用电设备及电化学装置的制备方法
EP22964717.7A EP4614630A4 (en) 2022-11-08 2022-11-08 ELECTROCHEMICAL APPARATUS, ELECTRICAL DEVICE AND METHOD FOR MANUFACTURED ELECTROCHEMICAL APPARATUS
US19/202,202 US20250273793A1 (en) 2022-11-08 2025-05-08 Electrochemical apparatus, electric device, and manufacturing method for electrochemical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/130553 WO2024098241A1 (zh) 2022-11-08 2022-11-08 电化学装置、用电设备及电化学装置的制备方法

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US19/202,202 Continuation US20250273793A1 (en) 2022-11-08 2025-05-08 Electrochemical apparatus, electric device, and manufacturing method for electrochemical apparatus

Publications (1)

Publication Number Publication Date
WO2024098241A1 true WO2024098241A1 (zh) 2024-05-16

Family

ID=88394435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/130553 Ceased WO2024098241A1 (zh) 2022-11-08 2022-11-08 电化学装置、用电设备及电化学装置的制备方法

Country Status (5)

Country Link
US (1) US20250273793A1 (zh)
EP (1) EP4614630A4 (zh)
JP (1) JP2025539241A (zh)
CN (1) CN116941077A (zh)
WO (1) WO2024098241A1 (zh)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN213752868U (zh) * 2020-11-30 2021-07-20 东莞新能安科技有限公司 电池组、电池包和用电装置
CN113193282A (zh) * 2021-04-29 2021-07-30 东莞新能安科技有限公司 电池模组和用电设备
CN214123999U (zh) * 2021-01-29 2021-09-03 东莞新能安科技有限公司 一种电池包及用电设备
CN214254670U (zh) * 2021-02-26 2021-09-21 东莞新能安科技有限公司 电池包及用电设备
CN215377612U (zh) * 2021-08-16 2021-12-31 东莞新能安科技有限公司 电池组及用电设备
CN113904055A (zh) * 2021-09-18 2022-01-07 东莞新能安科技有限公司 电池组件和用电设备
JP2022017722A (ja) * 2020-07-14 2022-01-26 森村Sofcテクノロジー株式会社 電気化学反応セルスタック
CN217361781U (zh) * 2022-01-05 2022-09-02 东莞新能安科技有限公司 一种电池组及用电装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102187067B1 (ko) * 2017-08-10 2020-12-04 주식회사 엘지화학 배터리 모듈 및 배터리 모듈의 제조 방법
CN109920962B (zh) * 2017-12-13 2024-09-13 比亚迪股份有限公司 电池系统及电动汽车
CN208955068U (zh) * 2018-11-15 2019-06-07 桑顿新能源科技有限公司 动力电池模组中框及动力电池模组结构
CN216720116U (zh) * 2021-11-24 2022-06-10 比亚迪股份有限公司 电芯单元、电池及车辆

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022017722A (ja) * 2020-07-14 2022-01-26 森村Sofcテクノロジー株式会社 電気化学反応セルスタック
CN213752868U (zh) * 2020-11-30 2021-07-20 东莞新能安科技有限公司 电池组、电池包和用电装置
CN214123999U (zh) * 2021-01-29 2021-09-03 东莞新能安科技有限公司 一种电池包及用电设备
CN214254670U (zh) * 2021-02-26 2021-09-21 东莞新能安科技有限公司 电池包及用电设备
CN113193282A (zh) * 2021-04-29 2021-07-30 东莞新能安科技有限公司 电池模组和用电设备
CN215377612U (zh) * 2021-08-16 2021-12-31 东莞新能安科技有限公司 电池组及用电设备
CN113904055A (zh) * 2021-09-18 2022-01-07 东莞新能安科技有限公司 电池组件和用电设备
CN217361781U (zh) * 2022-01-05 2022-09-02 东莞新能安科技有限公司 一种电池组及用电装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4614630A4 *

Also Published As

Publication number Publication date
CN116941077A (zh) 2023-10-24
US20250273793A1 (en) 2025-08-28
EP4614630A1 (en) 2025-09-10
EP4614630A4 (en) 2025-12-24
JP2025539241A (ja) 2025-12-04

Similar Documents

Publication Publication Date Title
CN209447944U (zh) 一种电池单体组件、电池模块及电池包
CN101872870B (zh) 具有集流板的可再充电电池
KR100848788B1 (ko) 결합부에서 전극 탭들의 크기가 동일한 전극조립체 및 이를포함하고 있는 전기화학 셀
CN108598353B (zh) 充电电池
KR100846071B1 (ko) 신규한 전극리드-전극 탭 결합부로 이루어진 전극조립체 및이를 포함하고 있는 전기화학 셀
JP5193066B2 (ja) 電極を保持するための部材を有する電極集合体及び該電極集合体を含む二次電池
KR102275545B1 (ko) 배터리 셀 및 그 제조 방법
CN111799429B (zh) 软包电池和软包电池的组装方法
WO2024098248A1 (zh) 电化学装置及用电设备
CN116722198A (zh) 电极组件及电池单体
CN212874703U (zh) 一种一体化成型的内串软包锂离子电池组
CN101662044B (zh) 锂离子电池及电池组
JP2022156433A (ja) 蓄電装置
WO2024098241A1 (zh) 电化学装置、用电设备及电化学装置的制备方法
CN206742296U (zh) 电池组
CN114614210B (zh) 电化学装置、电池模组及电子设备
CN215834600U (zh) 一种软包装电池模组
WO2024131668A1 (zh) 电池和电池的制造方法
CN206179972U (zh) 电池模组
CN117525713A (zh) 电池模组、电池包及用电设备
CN202662714U (zh) 电池
CN206742401U (zh) 电池组
CN116073078A (zh) 电芯组件和电池包
CN223871595U (zh) 一种提高电芯堆叠安全的软芯电池包
JP2022156429A (ja) 蓄電装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22964717

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2025525732

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2025525732

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 2022964717

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 202517055024

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 2022964717

Country of ref document: EP

Effective date: 20250605

NENP Non-entry into the national phase

Ref country code: DE

WWP Wipo information: published in national office

Ref document number: 202517055024

Country of ref document: IN

WWP Wipo information: published in national office

Ref document number: 2022964717

Country of ref document: EP