WO2020103014A1 - Batterie intelligente et son cœur de batterie au lithium - Google Patents

Batterie intelligente et son cœur de batterie au lithium

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Publication number
WO2020103014A1
WO2020103014A1 PCT/CN2018/116634 CN2018116634W WO2020103014A1 WO 2020103014 A1 WO2020103014 A1 WO 2020103014A1 CN 2018116634 W CN2018116634 W CN 2018116634W WO 2020103014 A1 WO2020103014 A1 WO 2020103014A1
Authority
WO
WIPO (PCT)
Prior art keywords
tab
lithium battery
battery cell
welding
cell according
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/CN2018/116634
Other languages
English (en)
Chinese (zh)
Inventor
时文平
刘东任
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.)
Shenzhen Mali Energy Technology Co Ltd
Original Assignee
Shenzhen Mali Energy Technology Co 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 Shenzhen Mali Energy Technology Co Ltd filed Critical Shenzhen Mali Energy Technology Co Ltd
Priority to CN201880099025.8A priority Critical patent/CN112913076A/zh
Priority to PCT/CN2018/116634 priority patent/WO2020103014A1/fr
Publication of WO2020103014A1 publication Critical patent/WO2020103014A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to an intelligent battery and its lithium battery core, which belong to the field of batteries.
  • Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution.
  • a battery composed of cells assembled by winding is called a wound lithium battery, and is also called a winding core in the industry.
  • the wound lithium battery includes a wound electrode assembly and an aluminum-plastic film wrapped around the wound electrode assembly to seal it.
  • the wound electrode assembly is mainly composed of a positive electrode sheet and a separator It is formed by stacking and winding with the negative electrode sheet.
  • At least two connecting tabs are provided at the first end of the wound electrode assembly, one of the connecting tabs is connected to the positive tab, and the other connecting tab is connected to the negative tab.
  • the aluminum-plastic film of the wound lithium battery has a risk of being punctured by the connecting tab or other parts in the wound electrode assembly, which may affect the safety of the lithium battery.
  • embodiments of the present invention provide a smart battery and its lithium battery cell.
  • a lithium battery core includes: a wound electrode assembly, which is mainly formed by stacking and winding a positive electrode sheet, a separator, and a negative electrode sheet; At least two connecting tabs are provided at the first end of the wound electrode assembly, one connecting tab is connected to the positive electrode tab, and the other connecting tab is connected to the negative electrode tab; The wound electrode assembly, and sealing the wound electrode assembly; wherein, the second end of the wound electrode assembly is covered with an electrode protective glue, and the at least two connecting tabs are wound from the wound After the first end of the electrode assembly is extended, it is bent multiple times to form a plurality of bent portions, and one of the bent portions at least partially overlaps the electrode protection paste in the thickness direction.
  • a lithium battery core includes: a wound electrode assembly, which is mainly formed by stacking and winding a positive electrode sheet, a separator, and a negative electrode sheet; The first end of the wound electrode assembly is also provided with at least two connecting tabs, one connecting tab is connected to the positive electrode tab, and the other connecting tab is connected to the negative electrode tab; the aluminum-plastic film is coated The wound electrode assembly, and sealing the wound electrode assembly; a transfer tab, one end of which is inserted into the cavity formed by the aluminum-plastic film, and the other end is exposed outside the aluminum-plastic film.
  • the adapter tab is used for electrical connection with the connecting tab; wherein the connecting tab includes a welding section away from the positive and negative plates, and the connecting tab faces the surface of the aluminum-plastic film and The welding section is welded, and the outer surfaces of the welding marks of the connecting tab and the connecting pole are covered with a welding mark protective glue.
  • a smart battery including: a housing provided with an accommodating portion; the above-mentioned lithium battery, the lithium battery core is installed in the accommodating portion; and a battery control board installed in the accommodating portion The battery is electrically connected to the lithium battery cell; wherein the lithium battery cell is charged and discharged through the battery control board, and the battery control board is used to control the discharge or charging of the lithium battery cell.
  • the electrode sealant is provided on the second end of the wound electrode assembly, or the outer surface of the welding mark welded on the welding section of the connecting tab and the connecting tab is covered with the welding sealant , Can reduce the risk of puncturing the aluminum plastic film, thereby improving the safety of lithium batteries.
  • FIG. 1 is a side view of a lithium battery cell provided by an embodiment of the present invention.
  • FIGS 2 to 5 are schematic diagrams of the manufacturing process of the lithium battery core provided by the embodiment of the present invention.
  • 10-wound electrode assembly 10a-first end; 10b-second end; 101-positive electrode; 103-negative electrode; 105-separator; 30-aluminum plastic film; 50-connecting lug; 501-welding section 503-connecting section; 601-electrode protection glue; 603-welding sealant; 605-pole protection glue; 70-transferring ear; 701-welding part; 801-welding mark.
  • FIG. 1 is a side view of a lithium battery cell provided by an embodiment of the present invention.
  • the lithium battery provided in this embodiment includes: a wound electrode assembly 10 and an aluminum-plastic film 30 covering and sealing the wound electrode assembly 10.
  • the wound electrode assembly 10 is mainly formed by stacking the positive electrode sheet 101, the separator 105, and the negative electrode sheet 103, and then winding them.
  • the positive electrode sheet 101, the separator 105, and the negative electrode sheet 103 that are stacked together may be wound by any suitable winding method such as a Z shape, an S shape, or a zigzag shape.
  • the wound electrode assembly 10 includes a plurality of positive electrode sheets 101 and a plurality of negative electrode sheets 103. Therefore, when manufacturing the wound electrode assembly 10, the positive electrode sheet 101, the separator 105, and the negative electrode sheet 103 may be alternately stacked and wound.
  • At least two connecting tabs 50 are provided at the first end 10a of the wound electrode assembly 10, one of the connecting tabs 50 is connected to the positive electrode sheet 101 (eg, welding), and the other connecting tab 50 is connected to the negative electrode sheet 103 ( For example welding).
  • FIG. 1 shows that the first end 10 a of the wound electrode assembly 10 wound in a zigzag winding manner is provided with a negative electrode tab connected to the negative electrode sheet 103 and a connecting electrode connected to the positive electrode sheet 101 Ear 50 (not shown in FIG. 1).
  • the wound electrode assembly 10 includes a plurality of positive electrode sheets 101 and a plurality of negative electrode sheets 103, each positive electrode sheet 101 is connected with a connecting tab 50, and each negative electrode sheet 103 is also connected with a connecting tab 50 .
  • the connecting tab 50 connected to the positive electrode sheet 101 is a positive tab
  • the connecting tab 50 connected to the negative electrode sheet 103 is a negative tab
  • the second end 10b of the wound electrode assembly 10 is covered with a protective glue, and at least two connecting tabs 50 extend from the first end 10a of the wound electrode assembly 10 after being bent multiple times to form Among the plurality of bent portions, one of the bent portions overlaps at least a portion of the electrode protective paste 601 in the thickness direction.
  • Figure 1 defines the X direction as the thickness direction.
  • the connecting tab 50 extends from the first end 10a of the wound electrode assembly 10
  • it is bent downward to form a first bent portion
  • the connecting tab 50 is bent upward again to form a first
  • the second bending portion partially overlaps with the electrode protective glue 601 covering the second end 10b of the wound electrode assembly 10 in the thickness direction.
  • the second bent portion and the electrode protective glue 601 partially overlap in the thickness direction
  • the second bent portion and the electrode protective glue 601 may also be made It completely overlaps, or the first bent portion and the electrode protection paste 601 may partially overlap.
  • the positive electrode sheet 101 and the negative electrode sheet 103 can be prepared using any process in the prior art.
  • the positive electrode sheet 101 may be formed by uniformly coating the positive electrode slurry on the positive electrode current collector aluminum foil, and then drying and rolling.
  • the negative electrode sheet 103 can be formed by uniformly coating the negative electrode slurry on the negative electrode current collector copper foil, and then drying and rolling.
  • any suitable slurry commercially available can be used as the positive electrode slurry and the negative electrode slurry.
  • the positive electrode slurry may include polyvinylidene fluoride (PVDF), nano-composite conductive agent, lithium nickel cobalt manganate Li (Ni x Co y Mn 1-xy ) O 2 and lithium iron phosphate Wait.
  • PVDF polyvinylidene fluoride
  • the negative electrode slurry may include sodium carboxymethyl cellulose (CMC), styrene-butadiene rubber (SBR), nano-composite conductive agent, artificial graphite, and the like.
  • a connecting tab 50 is welded to each positive electrode sheet 101 and each negative electrode sheet 103. It can be understood that the positive electrode tabs welded on the positive electrode sheet and the negative electrode tabs welded on the negative electrode sheet are spaced apart to avoid short-circuiting the two.
  • the negative electrode tabs welded on the negative electrode sheet 103 may be overlapped along the thickness direction as shown in FIG. 1; similarly, the positive electrode The positive electrode tabs welded on the sheet 101 may also be overlapped along the thickness direction.
  • at least two of the plurality of positive electrode tabs for connecting the positive electrode sheet 101 may be staggered according to needs.
  • at least two of the plurality of negative electrode tabs for connecting the negative electrode sheet 103 may be staggered according to need.
  • the same material as the positive electrode sheet 101 may be used to make the positive electrode tab welded to the positive electrode sheet 101, that is, the positive electrode tab welded to the positive electrode sheet 101 in this embodiment is an aluminum tab.
  • the negative electrode tab welded to the negative electrode sheet 103 can also be made of the same material as the negative electrode sheet 103, that is, the negative electrode tab welded to the negative electrode sheet in this embodiment is a copper tab.
  • the separator for separating the positive electrode sheet 101 and the negative electrode sheet 103 may be made of polypropylene (PP), polyethylene (PE) or other suitable materials.
  • PP polypropylene
  • PE polyethylene
  • a polypropylene / polyethylene / polypropylene (PP / PE / PP) three-layer film structure with a thickness of 20-40 microns can be used as the separator, and its porosity can be between 45% and 60% between.
  • the electrode protective glue 601 can use UV glue, so that during the preparation of the lithium battery, the UV glue can be applied to the second end 10b of the wound electrode assembly 10 by a mechanized method, and then passed through the ultraviolet Only light curing is required, so that the production efficiency of the lithium battery core can be improved.
  • the electrode protective glue 601 may also use other suitable glue.
  • the second end 10b ie, the end opposite to the first end 10a provided with the connecting tab 50
  • the electrode protective glue 601 so that the wound
  • the positive electrode 101 and the negative electrode 103 of the second end 10b of the modular assembly are separated from Lushun, so that the aluminum plastic film 30 will not contact the positive electrode 101 and the negative electrode 103, so as to avoid the positive electrode 101 and the negative electrode 103 due to cutting or The burrs formed by other reasons puncture the aluminum-plastic film 30, which can effectively avoid the damage of the aluminum-plastic film 30 and improve the safety of the lithium battery.
  • the positive electrode sheet caused by the temperature change of the lithium battery during charging and discharging or due to other reasons
  • the thermal expansion and contraction of 101 and / or the negative electrode sheet 103 will not cause the aluminum plastic film 30 to be easily punctured, so that the safety of the lithium battery can also be improved.
  • the lithium battery cell further includes an adapter tab 70.
  • One end of the adapter tab 70 extends into the cavity formed by the aluminum-plastic film 30, and the other end
  • the aluminum plastic film 30 protrudes outside to serve as the electrical connection point of the lithium battery cell to the outside.
  • the surface of the welding segment 501 connecting the tab 50 away from the positive electrode sheet 101 and the negative electrode sheet 103 toward the electrode protective glue 601 is welded to the end of the transfer tab 70 extending into the aluminum-plastic film 30.
  • the connecting tab 50 can be hidden in the cavity of the aluminum-plastic film 30, so as to protect the connecting tab 50 and prevent subsequent operations from affecting the connection between the connecting tab 50 and the pole piece, Especially when a plurality of positive electrode pieces 101 and negative electrode pieces 103 are alternately stacked together, the connecting tab 50 is disposed in the cavity of the aluminum-plastic film 30 to avoid the shaking of the connecting tab 50.
  • FIG. 1 only shows a schematic structural diagram of the welding section 501 of the negative pole tab and one adapter tab 70 after welding, and the structural form of the welding section 501 of the positive pole tab and the adapter tab 70 is the same as this Or similar.
  • the outer surface of the welding mark 801 welded between the connecting tab 70 and the connecting tab 50 may be covered with a welding mark protective glue 603 (such as UV glue) to avoid the welding mark 801 or The burr on the welding section 501 of the connecting tab 50 punctures the aluminum plastic film 30, thereby improving the safety of the lithium battery cell.
  • a welding mark protective glue 603 such as UV glue
  • the UV sealant 603 can also use UV glue, so that during the preparation of the lithium battery, the UV glue can be applied to the welding section 501 and the area 801 of the welding mark 501 by mechanical means. Then it can be cured by ultraviolet light, so that the production efficiency of the lithium battery can be improved.
  • the solder paste protective glue 603 can also use other suitable glue. By covering the outer surface of the welding mark 801 welded on the connecting tab 70 and the connecting tab 50 with the welding mark protective glue 603, the lithium battery can avoid the burr of the welding mark 801 on the aluminum The potential threat of membrane 30. And because it can be produced in a mechanized manner, the processing efficiency of the lithium battery can also be improved.
  • solder mask protective glue 603 formed by the dispensing method will not easily spring off and fall off, which can improve the protection effect, and the solder mask protective glue 603 itself can increase the contact area with the diaphragm 105, thereby improving the fixing effect To further enhance the protection effect.
  • the second bent portion of the connecting tab 50 may be formed with a groove, so that one end of the transfer tab 70 extending into the cavity of the aluminum-plastic film 30 is inserted into the groove It is welded together with the part where the connecting tab 50 is located outside (that is, the part away from the positive electrode 101 and the negative electrode 103), so that the welding mark 801 is located on the surface of the connecting tab 50 facing away from the electrode protection glue 601.
  • the second bent portion of the tab 50 may be connected without forming a groove.
  • the end of the second bent portion shown in FIG. 1 is attached to the middle section of the connecting tab 50, and at this time, the transition tab 70 can be connected to the connecting pole from the outside of the end of the second bent portion
  • the ears 50 are welded together, so that the transfer tab 70 and the welding mark 801 of the connecting tab 50 are also located on the surface of the connecting tab 50 facing away from the electrode protection glue 601.
  • the end of the connecting tab 50 may not extend upward but directly extend parallel to the right.
  • the connecting tab 70 may be parallel It extends at the end of the second bending portion (that is, the transfer tab 70 extends to the left).
  • the welding mark 801 formed by welding the transfer tab 70 and the connecting tab 50 is located below.
  • the welding mark 801 may also be located at other suitable positions of the connecting tab 50, for example, it has been described above that the welding mark 801 may be located below FIG. 1.
  • the welding mark 801 can also be located at other positions in FIG. 1.
  • the connecting tab 50 of the lithium battery also includes the second bent portion shown in FIG. 1, and the adapter tab 70 is also inserted into the recess formed by the second bent portion as shown in FIG. 1 Inside the slot.
  • the adapter tab 70 it can be welded together with the part of the connecting tab 50 on the inner side (that is, the part close to the pole piece), so that the welding mark 801 is located on the connecting tab 50 toward the electrode protective glue 601 surface.
  • one end of the transfer tab 70 may also be bent to form a welding portion 701 extending in the thickness direction of the lithium battery, which is welded to the connecting tab 50 Segment 501 is welded together.
  • the connecting tab 50 is formed with a groove in the second bent portion as shown in FIG. 1, the welding portion 701 of the adapter tab 70 may be inserted into the groove as shown in FIG. 1, Therefore, the bending of the connecting tab 70 can cover the end of the connecting tab 50, avoid exposing the end of the connecting tab 50, and reduce the chance of contacting the end of the connecting tab 50 with the aluminum-plastic film 30, thereby reducing the connecting tab 50 The possibility of puncturing the aluminum plastic film 30 to improve the safety of the lithium battery cell.
  • the bent portion of the connecting tab 50 close to the welding portion 701 of the adapter tab 70 may exist along the thickness direction with the electrode protective glue 601 Overlap.
  • the second bent portion is a bent portion near the welding portion 701 of the adapter tab 70, and the second bent portion and the electrode protective glue 601 may be part along the thickness direction They overlap, or they can overlap completely.
  • the lithium battery core is optionally provided with a solder print protective glue 603 on the basis of the electrode protective glue 601.
  • the lithium battery core may also be provided with only the above-mentioned solder seal protective glue 603, which is illustrated as follows:
  • the lithium cell also includes a wound electrode assembly 10, an aluminum-plastic film 30 (not shown in FIG. 1) that wraps and seals the wound electrode assembly 10, and an adapter tab 70.
  • the wound electrode assembly 10 is mainly formed by stacking the positive electrode sheet 101, the separator 105, and the negative electrode sheet 103, and then winding them. At least two connecting tabs 50 are provided at the first end 10a of the wound electrode assembly 10, one of the connecting tabs 50 is connected to the positive electrode sheet 101 (eg, welding), and the other connecting tab 50 is connected to the negative electrode sheet 103 ( For example welding).
  • One end of the adapter tab 70 is inserted into the cavity formed by the aluminum-plastic film 30, and the other end is exposed outside the aluminum-plastic film 30.
  • the surface of the portion of the aluminum plastic film 30 facing the aluminum plastic film 30 that is, the right surface in FIG. 1 and the connecting tab 50 far from the positive electrode 101 and the negative electrode 103
  • the welding section 501 is welded, and the outer surface of the welding mark 801 of the connecting tab 70 and the connecting tab 50 is covered with a welding sealant 603 to prevent the burr on the welding mark 801 from puncturing the aluminum plastic film 30.
  • the solder resist 603 covers a portion of the outer surface of the solder pad 801 of the transfer tab 70 and the connecting tab 50; in other examples, the solder seal protection The glue 603 can cover all of the outer surface of the welding mark 801; in some other examples, the welding sealant 603 can also completely cover the surface of the welding section 501 of the connecting tab 50 facing the aluminum-plastic film 30.
  • FIG. 1 shows that the solder resist 603 completely covers the surface of the welding section 501 of the connecting tab 50 facing the aluminum-plastic film 30.
  • the connecting tab 50 further includes a connecting section 503 close to the positive electrode sheet 101 and the negative electrode sheet 103.
  • the surface of the connecting section 503 facing the aluminum-plastic film 30 is covered with a protective tab 605 for the tab.
  • a protective tab 605 for the tab It is UV glue or other suitable glue. It can be understood that when a plurality of connecting tabs 50 are stacked in the thickness direction, only the surface of the connecting segment 503 of the outermost connecting tab 50 facing the aluminum-plastic film 30 may be covered with the tab protective glue 605.
  • FIGS. 2 to 5 are schematic diagrams of the manufacturing process of the lithium battery core provided in this embodiment (the aluminum plastic film 30 is omitted). Among them, FIGS. 2 and 3 are top views, and FIGS. 4 and 5 are side views.
  • a wound electrode assembly 10 and two adapter tabs 70 are provided.
  • the wound electrode assembly 10 is mainly formed by stacking and winding a positive electrode sheet 101, a negative electrode sheet 103, and a separator 105, and a plurality of connecting tabs 50 are connected to the first end 10a of the wound electrode assembly 10.
  • a positive tab located on the left side of FIG. 2 is welded to the positive electrode sheet 101 of the wound electrode assembly 10
  • a negative electrode is welded to the negative electrode sheet 103 of the wound electrode assembly 10.
  • Polar ear located on the right side of Figure 2).
  • the second end 10b of the wound electrode assembly 10 is uniformly coated with UV glue by a dispenser (please refer to FIG. 4 together), so that the second end 10b of the wound electrode assembly 10 and the aluminum plastic film 30 Isolate to avoid puncturing the aluminum-plastic film 30.
  • one of the transfer tabs 70 is welded to the positive tab connected to the positive electrode sheet 101, and the other transfer tab 70 is welded to the negative tab connected to the negative electrode sheet 103.
  • the negative electrode tab for connecting the negative electrode sheet 103 is formed with a first bent portion located above and a second bent portion located below, and the connecting tab 70 is welded to the second bent portion End.
  • the structure of the connecting tab 50 and the connecting tab 70 connected to the positive electrode sheet is the same as or similar to the structure of the connecting tab 50 and the connecting tab 70 connected to the negative electrode sheet.
  • the surface of the connecting tab 50 facing the aluminum-plastic film 30 can also be uniformly coated with UV glue by a dispenser to prevent the burrs on the connecting tab 50 from puncturing the aluminum-plastic film 30. It is easy to understand that when a plurality of positive electrode sheets 101 and a plurality of negative electrode sheets 103 are alternately stacked together, it is possible to apply UV glue only to the surface of the outermost connecting tab 50 near the aluminum-plastic film 30. Of course, this The examples also do not exclude that all connecting tabs 50 are coated with UV glue.
  • the lithium battery of this embodiment is filled with an electrolyte in the aluminum-plastic film 30.
  • electrolyte refer to the electrolyte used in the lithium battery in the prior art, and no specific limitation is made in the present invention.
  • This embodiment also provides a smart battery, including a housing, a battery control board, and the above lithium battery.
  • the housing is provided with an accommodating part, the battery control board and the lithium battery core are installed in the accommodating part, and the battery control board and the lithium battery core are electrically connected.
  • the lithium battery cell is discharged or charged through the battery control board, and the battery control board can control the discharge or charge of the lithium battery cell.
  • the battery control board controls one or more of the voltage, current, temperature, power, or other factors in the process of discharging or charging the lithium cell, thereby controlling the process of charging or discharging the lithium cell.
  • a plurality of cells connected in parallel or in series are provided in the accommodating part.
  • the terms “installation”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be fixed or detachable Connected, or integrated; may be directly connected or indirectly connected through an intermediate medium, may be the connection between the two elements or the interaction between the two elements, unless otherwise clearly defined.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne un cœur de batterie au lithium, le cœur de batterie au lithium comprenant : un ensemble électrode de type enroulé, l'ensemble électrode de type enroulé étant principalement composé d'une plaque d'électrode positive, d'une membrane et d'une plaque d'électrode négative empilées et enroulées ; une extrémité de l'ensemble électrode de type enroulé étant pourvue d'au moins deux cosses d'électrode de connexion, une cosse d'électrode de connexion étant connectée à la plaque d'électrode positive et l'autre cosse d'électrode de connexion étant connectée à la plaque d'électrode négative ; et un film en plastique et aluminium revêtant l'ensemble électrode de type enroulé et scellant l'ensemble électrode de type enroulé. Dans un mode de réalisation, la seconde extrémité de l'ensemble électrode de type enroulé peut être revêtue d'un adhésif protecteur d'électrode ; dans un autre mode de réalisation, le cœur de batterie au lithium comprend également une cosse d'électrode de commutation ayant une extrémité s'étendant dans une cavité de réception du film en plastique et aluminium et étant soudée à une section de soudure des cosses d'électrode de connexion positionnée à distance de la plaque d'électrode positive et de la plaque d'électrode négative, la surface extérieure du joint de soudure de la cosse d'électrode de commutation et la cosse d'électrode de connexion étant revêtue d'un adhésif protecteur de joint de soudure. L'agencement de l'adhésif protecteur d'électrode ou de l'adhésif protecteur de joint de soudure peut réduire le risque que le film en plastique et aluminium soit perforé, ce qui améliore la sécurité du cœur de batterie au lithium. La présente invention concerne également une batterie intelligente.
PCT/CN2018/116634 2018-11-21 2018-11-21 Batterie intelligente et son cœur de batterie au lithium Ceased WO2020103014A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880099025.8A CN112913076A (zh) 2018-11-21 2018-11-21 智能电池及其锂电芯
PCT/CN2018/116634 WO2020103014A1 (fr) 2018-11-21 2018-11-21 Batterie intelligente et son cœur de batterie au lithium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/116634 WO2020103014A1 (fr) 2018-11-21 2018-11-21 Batterie intelligente et son cœur de batterie au lithium

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CN112635922A (zh) * 2020-12-16 2021-04-09 宁德新能源科技有限公司 电芯、电池及用电设备
CN113097570A (zh) * 2021-03-26 2021-07-09 宁德新能源科技有限公司 卷绕电芯及用于其的极耳错位测量方法
CN113097660A (zh) * 2021-03-30 2021-07-09 东莞新能安科技有限公司 电化学装置及应用其的用电装置
CN113131055A (zh) * 2021-03-30 2021-07-16 宁德新能源科技有限公司 电芯以及用电设备
CN113270671A (zh) * 2021-05-13 2021-08-17 宁德新能源科技有限公司 电芯及用电装置
CN113363642A (zh) * 2021-05-31 2021-09-07 宁德新能源科技有限公司 电芯及用电装置
CN113571845A (zh) * 2021-06-24 2021-10-29 惠州锂威新能源科技有限公司 一种多极耳电芯的折极耳方法
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