WO2024251067A1 - 一种密封连接件及大容量电池 - Google Patents

一种密封连接件及大容量电池 Download PDF

Info

Publication number
WO2024251067A1
WO2024251067A1 PCT/CN2024/096992 CN2024096992W WO2024251067A1 WO 2024251067 A1 WO2024251067 A1 WO 2024251067A1 CN 2024096992 W CN2024096992 W CN 2024096992W WO 2024251067 A1 WO2024251067 A1 WO 2024251067A1
Authority
WO
WIPO (PCT)
Prior art keywords
area
single cell
shell
battery
integrally formed
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/CN2024/096992
Other languages
English (en)
French (fr)
Inventor
陈孟奇
雷政军
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.)
D Aus Energy Storage Technology Xian Co Ltd
Original Assignee
D Aus Energy Storage Technology Xian 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 D Aus Energy Storage Technology Xian Co Ltd filed Critical D Aus Energy Storage Technology Xian Co Ltd
Publication of WO2024251067A1 publication Critical patent/WO2024251067A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/673—Containers for storing liquids; Delivery conduits therefor
    • H01M50/682—Containers for storing liquids; Delivery conduits therefor accommodated in battery or cell casings
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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 present application belongs to the field of batteries, and specifically relates to a sealed connector and a large-capacity battery.
  • the related art proposes a large-capacity battery, as shown in Figures 1 and 2, the large-capacity battery includes a shell 1 and a plurality of single cells 2; the plurality of single cells are placed in parallel in the shell 1, and a first through hole 3 for the single cell pole to extend out of the shell 1 is provided on the top plate of the shell 1 corresponding to the pole of each single cell 2; the shell 1 is provided with at least one shared chamber 4 connected to the inner cavity of each single cell 2;
  • the electrolyte of each single cell can be shared; as shown in FIG. 2 , when it is used to communicate with the gas area in the inner cavity of each single cell, it can be used to achieve gas balance of each single cell.
  • the shared chamber 4 allows each single cell to be in at least one of a unified electrolyte environment and a gas balance environment, thereby ensuring the uniformity of each single cell and improving the performance and cycle life of large-capacity batteries.
  • the sealing performance of the housing 1 is particularly important.
  • each first through hole 3 on the housing 1 and the corresponding upper cover assembly of the single cell 2 need to be sealed and welded to ensure the sealing at this position.
  • the current method is to weld the housing and the upper cover assembly of the single cell by laser welding in the surrounding area corresponding to each first through hole 3 (the circle at A in Figure 1 is the welding track).
  • the present application provides a sealing connector for sealingly connecting the shell of the large-capacity battery and the upper cover plate of any single cell, wherein the shell is provided with a plurality of first through holes for extending the poles of each single cell in the large-capacity battery; the sealing connector comprises a hollow member for being sleeved on the outside of the pole of the single cell; the bottom of the hollow member is used for sealingly connecting with the first area of the single cell, and the top of the hollow member is sealed with the second area of the shell;
  • the first area is an area located around any pole in the upper cover plate of any single battery
  • the second area is an area corresponding to any first through hole on the housing.
  • the hollow component When the hollow component is used in the present application, it is sleeved on the outside of the pole of the single cell, and the bottom is used for sealing connection with the upper cover of the single cell, and the top is used for sealing connection with the peripheral area of the first through hole corresponding to the pole on the outer shell.
  • the hollow component can seal and fix the outer shell and the upper cover of the single cell, thereby ensuring the sealing of the large-capacity battery outer shell, and solving the problem of cold welding or even failure to weld that may occur when directly laser welding the outer shell and the upper cover of the single cell.
  • a first annular plate for welding to the upper cover plate of the single cell is arranged on the outer side of the bottom of the hollow member.
  • the first annular plate is welded to the upper cover plate of the single cell, and then the top of the hollow member is directly welded to the hole wall of the first through hole, or the top of the hollow member is bent and welded to the area around the first through hole on the shell.
  • the hollow component and the first annular plate are integrally formed.
  • the hollow member comprises a second annular plate and a third annular plate arranged at the inner side of the bottom of the hollow member for welding with the first area; the inner diameter of the third annular plate is larger than the outer diameter of the insulating sealing pad arranged at the pole of the single cell.
  • the single cell When in use, the single cell can be placed in the shell first, and after ensuring that the single cell extends out of the first through hole, the hollow component can be placed in from the first through hole, ensuring that the third annular plate contacts the upper cover plate of the single cell, and after the second annular plate contacts the outer surface of the shell, the third annular plate and the first area, as well as the second annular plate and the second area can be welded respectively.
  • the hollow component, the second annular plate and the third annular plate are integrally formed.
  • a buffer deformation groove is provided on the side wall of the hollow component.
  • the buffer deformation groove not only provides a certain deformation margin for sealing and fixing, which can be used to compensate for the problem of welding problems caused by the large gap between the shell and the single battery, but also compensates for the coaxiality deviation between the single battery pole and the first through hole corresponding thereto; at the same time, when the large-capacity battery is subjected to external force or self-vibration, the buffer deformation groove itself has a certain buffering effect, ensuring the reliability of sealing and fixing.
  • the second aspect of the present application provides a large-capacity battery, comprising a housing and N single cells, N being greater than or equal to 2; the N single cells are arranged in parallel and are arranged as a whole inside the housing; the housing is provided with an electrolyte sharing chamber connected to the electrolyte area of each single cell; the improvement thereof is:
  • the bottom of the hollow member is sealed and connected to the first area of any single cell, and the top of the hollow member is sealed and connected to the second area of the shell; the pole of the single cell extends out of the hollow member, and insulation is maintained between the pole of the single cell and the hollow member.
  • the large-capacity battery can achieve at least one uniform state of gas balance and electrolyte sharing for each single cell by sharing the chamber, thereby making the large-capacity battery have a longer cycle life.
  • the large-capacity battery uses a hollow component to seal the outer shell and the single cell, which not only has good sealing performance but also is easy to assemble.
  • there is one shared chamber which is integrally formed on the top of the shell and communicates with the gas area of the inner cavity of each single battery, thereby enabling the large-capacity battery to have a gas balance function and ensuring the consistency of the gas of each single battery.
  • the large-capacity battery has the functions of electrolyte sharing and gas balance at the same time, which greatly improves the consistency of the gas of each single cell.
  • FIG1 is a schematic diagram of a first structural form of a large-capacity battery proposed in the related art in the background art
  • FIG2 is a schematic diagram of a second structure of a large-capacity battery proposed in the related art in the background art
  • FIG3 is a schematic diagram of a third structural form of a large-capacity battery proposed in the related art in the background art
  • FIG4 is a schematic structural diagram of a sealing connector provided in Example 1;
  • FIG5 is a schematic diagram of the sealing connector and the single battery after connection in Example 1;
  • FIG6 is a schematic diagram of the sealing connector and the large-capacity battery after being connected in Example 1;
  • FIG7 is a schematic structural diagram of a sealing connector provided in Example 2.
  • FIG8 is a cross-sectional view of a sealing connector with an additional buffer deformation groove
  • FIG9 is a perspective view of the outer shell of a large-capacity battery in Example 3.
  • FIG10 is a schematic structural diagram of the first cover plate in Example 3.
  • FIG11 is a schematic diagram of the structure of the U-shaped housing in Example 3.
  • FIG12 is a perspective view of a large-capacity battery in Example 5.
  • FIG13 is a perspective view of the outer shell of a large-capacity battery in Example 5.
  • FIG14 is a schematic diagram of the structure of the U-shaped housing in Example 5.
  • FIG15 is a schematic diagram of the structure of the second cover plate in Example 5.
  • FIG16 is a schematic diagram of the structure of a large-capacity battery in Example 6.
  • FIG. 17 is a schematic diagram of the structure of a large-capacity battery housing in Example 6.
  • orientations or positional relationships indicated by the terms "top, bottom, inside and outside” in the text are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the technical solution.
  • first, second or third are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
  • the terms "installed, connected, connected” should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • installed, connected, connected should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • the present application adopts a sealing connector to solve the above problem.
  • the sealing connector includes a hollow component; the bottom of the hollow component is used to be sealed and connected to the first area of the single cell, and the top of the hollow component is sealed and connected to the second area of the shell; the first area is the area around any pole in the upper cover of any single cell; the second area is the area corresponding to any first through hole on the shell.
  • the area corresponding to the first through hole is the peripheral area on the outer surface of the shell corresponding to any one of the first through holes; or the area corresponding to the first through hole is the hole wall of the first through hole.
  • the area around the pole is the area around the insulating seal on the pole.
  • the insulating seal is a part on the single battery used to insulate the pole from the upper cover.
  • the hollow member is generally a thin-walled tubular structure, which can be sealed and connected to the upper cover plate of the single cell and the outer shell of the large-capacity battery by bonding, riveting or welding.
  • the horizontal cross-section of the hollow member can be a rectangular ring or a circular ring. In order to better adapt to the shape of the first through hole and the pole, the cross-section of the hollow member is usually a circular ring.
  • welding is usually used to seal the hollow component with the shell and the upper cover of the single battery.
  • the upper cover assembly of the single battery and the hollow component after welding since the shell of the single battery is made of aluminum material, the hollow component and the shell of the large-capacity battery are also made of aluminum material.
  • sealing connector and the large-capacity battery using the sealing connector are specifically described below in combination with several embodiments.
  • the sealing connector 5 in this embodiment includes a hollow component 51 and a first annular plate 52 arranged at the bottom of the hollow component 51; the first annular plate 52 can be fixed to the outer side of the bottom of the hollow component 51 by welding, or the first annular plate 52 can be integrally formed on the bottom of the hollow component 51 by bending. For ease of processing, it is usually preferred to integrally form the first annular plate 52 on the hollow component 51 by bending.
  • the sealing connection 5 of this embodiment when the sealing connection 5 of this embodiment is used, the sealing connection 5 is first It is sleeved outside the pole of the single cell 2, and then the sealing connector 5 is welded to the upper cover of the single cell 2 by using the first annular plate 52.
  • this embodiment adopts the laser melting welding method, and then the welded single cell 2 is placed in the shell 1, and then the top of the sealing connector 5 on the single cell 2 is bent, so that the bent part is in contact with the upper surface of the shell 1, and finally the bent part and the shell are welded.
  • this embodiment also adopts the laser melting welding method.
  • first annular plate 52 is not provided on the top of the hollow component 51, laser welding cannot be used when welding the hollow component 51 to the upper cover plate, which may make the reliability and sealing of the welding part relatively weak.
  • a pole adapter 21 in order to allow the single cell pole to extend, can be added to the existing pole of the single cell by screw connection or welding to ensure that the pole can extend out of the housing.
  • the horizontal cross-section of the pole adapter 21 can be cylindrical or square.
  • the sealing connector 5 in this embodiment includes a hollow member 51, a second annular plate 53 is arranged on the outer side of the top of the hollow member, and a third annular plate 54 is arranged on the inner side of the bottom of the hollow member; the inner diameter of the third annular plate is larger than the outer diameter of the insulating sealing pad arranged at the pole of the single cell, and the outer diameter of the side wall of the hollow member 51 between the second annular plate 53 and the third annular plate 54 is smaller than the aperture of the first through hole 3 on the housing 1.
  • the second annular plate 53 and the third annular plate 54 can be respectively fixed to the top and bottom of the hollow member 51 by welding (the top can be the top of the hollow member or the part close to the top, preferably the top; the bottom is the bottom of the hollow member), or the second annular plate 53 and the third annular plate 54 can be integrally formed on the top and bottom of the hollow member 51 by bending. In order to facilitate processing, it is usually preferred to integrally form the second annular plate and the third annular plate on the hollow member by bending.
  • the single battery when the sealing connector of this embodiment is used, the single battery can be placed in the housing 1 first, and after the single battery 2 is ensured to extend out of the first through hole 3, the sealing connector 5 can be placed through the first through hole 3.
  • the third annular plate 54 is in contact with the upper cover of the single cell and the second annular plate 53 is in contact with the outer surface of the housing
  • the third annular plate 54 and the upper cover of the single cell, and the second annular plate 53 and the outer surface of the housing 1 are welded respectively.
  • the laser welding method is adopted in this embodiment.
  • this hollow component structure does not require additional bending operations, thereby improving work efficiency.
  • a buffer deformation groove 55 is also provided on the side wall of the hollow component 51 of this embodiment.
  • the buffer deformation groove 55 not only provides a certain deformation margin for sealing and fixing, which can be used to compensate for the problem of welding problems caused by the large gap between the shell and the single battery, but also compensates for the coaxiality deviation between the single battery pole and the corresponding first through hole; at the same time, when the large-capacity battery is subjected to external force or self-vibration, the buffer deformation groove itself has a certain buffering effect, ensuring the reliability of sealing and fixing.
  • the structure of the buffer deformation groove 55 can also be applied to the sealing connector of Example 1.
  • a large-capacity battery comprises a housing 1, N single cells 2 and 2N sealing connectors 5, where N is greater than or equal to 2; the N single cells 2 are arranged in parallel and are integrally arranged inside the housing 1; a shared chamber 4 communicating with the gas regions of each single cell 2 is arranged on the top of the housing 1;
  • the bottom of the sealing connector 5 is sealed to the first area of any single battery 2, and the top of the sealing connector 5 is sealed to the second area of the housing 1; the pole of the single battery 2 extends out of the sealing connector 5, and insulation is maintained between the pole and the sealing connector 5; the insulation method can be casting insulating glue, or insulating rubber sleeve.
  • the sealing connector 5 adopts the structural form in Embodiment 2, and of course the structure in Embodiment 1 is also applicable.
  • the enclosure can take the following three forms:
  • the housing 1 includes a cylinder 11, a first cover plate 12, and a second cover plate 13; the top and bottom of the cylinder 11 are both open, and the first cover plate 12 is sealed and fixed (welded) to the top of the cylinder 11.
  • the second cover plate 13 is sealed and fixed (welded) to the bottom of the cylinder 11;
  • a shared cavity and 2N first through holes 3 are integrally formed on the first cover plate 12 , and the 2N first through holes 3 are arranged on both sides of the shared cavity.
  • the housing 1 includes a U-shaped shell 14, a first cover plate 12, a third cover plate 15 and a fourth cover plate 16; the top, front and rear of the U-shaped shell 14 are open, the first cover plate 12 is sealed and fixed (welded) to the top of the U-shaped shell 14, and the third cover plate 15 and the fourth cover plate 16 are sealed and fixed (welded) to the front and rear of the U-shaped shell 14 respectively.
  • a shared cavity and 2N first through holes 3 are integrally formed on the first cover plate 12 , and the 2N first through holes 3 are arranged on both sides of the shared cavity.
  • the housing 1 includes a cylinder 11, a third cover plate 15, and a fourth cover plate 16; the front and rear of the cylinder 11 are both open, the third cover plate 15 is sealed and fixed (welded) to the front of the cylinder 11, and the fourth cover plate 16 is sealed and fixed (welded) to the rear of the cylinder;
  • a shared chamber and 2N first through holes 3 are integrally formed at the top of the cylinder 11 , and the 2N first through holes 3 are arranged on both sides of the shared chamber.
  • the cylinder 11 and the U-shaped shell 14 can be spliced by welding, or can be integrally formed by casting or stamping. In order to facilitate processing and ensure sealing, the integral forming method is usually selected.
  • the large-capacity battery structure of this embodiment is basically the same as that of Embodiment 3, except that the gas port of the single cell is the explosion venting part, and the shared chamber covers the explosion venting part.
  • the thermal runaway smoke breaks through the explosion venting port and can be discharged through the shared chamber.
  • the structure of the large-capacity battery in this embodiment is basically the same as that in embodiment 3, and there is only one shared chamber.
  • the shared chamber is arranged at the bottom of the shell, and is used to connect the electrolyte areas of the inner cavities of each single cell. Since each single cell shares the electrolyte, multiple single cells in this embodiment need to be arranged in parallel.
  • each single cell When the sealing mechanism on the lower cover assembly of each single cell is opened under the action of electrolyte or external force, the electrolyte area of each single cell is connected to the shared chamber, and then each single cell is in a common Under the same electrolyte system, the performance and cycle life of large-capacity batteries are improved.
  • the shell of a large-capacity battery can be constructed in the following three forms:
  • the housing 1 includes a cylinder 11, a first cover plate 12, and a second cover plate 13; the top and bottom of the cylinder 11 are both open, the first cover plate 12 is sealed and fixed (welded) to the top of the cylinder 11, and the second cover plate 13 is sealed and fixed (welded) to the bottom of the cylinder 11;
  • the first cover plate 12 is provided with 2N first through holes 3
  • the second cover plate 13 is integrally formed with a shared cavity.
  • the outer shell 1 includes a U-shaped shell 14, a first cover plate 12, a third cover plate 15 and a fourth cover plate 16; the top, front and rear of the U-shaped shell 14 are open, the first cover plate 12 is sealed and fixed (welded) to the top of the U-shaped shell 14, and the third cover plate 15 and the fourth cover plate 16 are sealed and fixed (welded) to the front and rear of the U-shaped shell 14 respectively.
  • the first cover plate 12 is provided with 2N first through holes 3 , and a shared cavity is integrally formed on the bottom of the U-shaped shell 14 .
  • the housing 1 includes a cylinder 11, a third cover plate 15, and a fourth cover plate 16; the front and rear of the cylinder 11 are both open, the third cover plate 15 is sealed and fixed (welded) to the front of the cylinder 11, and the fourth cover plate 16 is sealed and fixed (welded) to the rear of the cylinder;
  • the top of the cylinder 11 is provided with 2N first through holes 3 , and the bottom of the cylinder 11 is integrally formed with a shared chamber.
  • the cylinder 11 and the U-shaped shell 14 can be spliced by welding, or can be integrally formed by casting or stamping. In order to facilitate processing and ensure sealing, the integral forming method is usually selected.
  • this embodiment is based on the embodiment 5 (electrolyte can be shared), and a shared chamber 4 is added on the top of the shell; that is, the large-capacity battery of this embodiment has two shared chambers 4 .
  • the large-capacity battery When the shared chamber 4 added on the top of the shell is connected to the gas area in the inner cavity of each single cell, the large-capacity battery has the functions of electrolyte sharing and gas balance, which greatly improves the consistency of the gas in each single cell.
  • the large-capacity battery has the electrolyte sharing function and the single battery explosion venting function, which ensures the consistency of the electrolyte of each single battery and improves safety to a certain extent.
  • the housing 1 includes a cylinder 11, a first cover plate 12, and a second cover plate 13; the top and bottom of the cylinder 11 are both open, the first cover plate 12 is sealed and fixed (welded) to the top of the cylinder 11, and the second cover plate 13 is sealed and fixed (welded) to the bottom of the cylinder 11;
  • the first cover plate 12 is provided with 2N first through holes 3 and is integrally formed with a shared cavity.
  • the second cover plate 13 is also integrally formed with a shared cavity.
  • the housing 1 includes a U-shaped shell 14, a first cover plate 12, a third cover plate 15 and a fourth cover plate 16; the top, front and rear of the U-shaped shell 14 are open, the first cover plate 12 is sealed and fixed (welded) to the top of the U-shaped shell 14, and the third cover plate 15 and the fourth cover plate 16 are sealed and fixed (welded) to the front and rear of the U-shaped shell 14, respectively.
  • the first cover plate 12 is provided with 2N first through holes 3 and is integrally formed with a shared cavity.
  • the bottom of the U-shaped shell 14 is also integrally formed with a shared cavity.
  • the housing 1 includes a cylinder 11, a third cover plate 15, and a fourth cover plate 16; the front and rear of the cylinder 11 are both open, the third cover plate 14 is sealed and fixed (welded) to the front of the cylinder 11, and the fourth cover plate 16 is sealed and fixed (welded) to the rear of the cylinder;
  • the top of the cylinder 11 is provided with 2N first through holes 3 and a shared chamber is integrally formed therewith, and the bottom of the cylinder 11 is also integrally formed therewith with a shared chamber.
  • the cylinder 11 and the U-shaped shell 14 can be spliced by welding, or can be integrally formed by casting or stamping. In order to facilitate processing and ensure sealing, the integral forming method is usually selected.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请公开了一种密封连接件及大容量电池，该密封连接件，用于将大容量电池的外壳和任一单体电池的上盖板密封连接，该密封连接件包括用于套设在单体电池极柱外侧的中空构件；该中空构件的底部用于和所述单体电池的第一区域密封连接，中空构件的顶部与所述外壳的第二区域密封连接。该密封连接件解决现有大容量电池的单体电池的上盖板和外壳之间存在间隙，导致激光熔焊时外壳和上盖板之间可能存在虚焊，甚至无法焊接的问题。

Description

一种密封连接件及大容量电池 技术领域
本申请属于电池领域，具体涉及一种密封连接件及大容量电池。
背景技术
现有的电池模组中各单体电池自身存在差异，使得电池模组中各单体电池的均一性较差，进而会直接导致电池模组的循环寿命受限，因此如何提升电池模组中各单体电池的均一性成为了该领域研究的重点和难点。
为了解决上述问题，相关技术提出了一种大容量电池，如图1和图2所述，该大容量电池包括外壳1以及多个单体电池2；多个单体电池并联放置在外壳1内，外壳1顶板上对应各单体电池2的极柱开设有供单体电池极柱伸出外壳1的第一通孔3；外壳1上设置有与各单体电池2内腔连通的至少一个共享腔室4；
如图1所示，若共享腔室4为一个，当其用于和各单体电池2内腔中电解液区连通，则可实现各单体电池的电解液共享；如图2所示，当其用于和各单体电池内腔中气体区连通，则可用于实现各单体电池的气体平衡。
如图3所示，若共享腔室4为二个，则其中一个用于实现单体电池的电解液共享，另一个用于实现各单体电池的气体平衡。
通过该共享腔室4可使各单体电池至少处于统一的电解液环境和气体平衡环境中的一种，确保了各单体电池的均一性，提升了大容量电池的性能和循环寿命。
为了避免共享腔室与外界环境保持完全的隔离，外壳1的密封性显得尤为重要。
多个单体电池2在成组后，需要将外壳1上的每个第一通孔3和与之对应的单体电池2的上盖组件进行密封焊接，以确保该位置处的密封性。当前采用的方式是，在每个第一通孔3对应的周边区域采用激光熔焊的方式将外壳和单体电池的上盖组件焊接(图1中A处圆圈为焊接轨迹)。
但是，在批量生产大容量电池时，由于加工误差和装配误差的存在，若 需要确保各单体电池底部处于同一水平面，则各单体电池的顶部(即上盖组件)会出现高低差不齐的问题，使得一些大容量电池中个别单体电池的上盖组件和外壳之间存在间隙，导致激光熔焊时外壳和上盖组件之间可能存在虚焊，甚至存在无法焊接的问题，大容量电池的成品率受到了影响。
发明内容
为了解决现有大容量电池的单体电池的上盖板和外壳之间存在间隙，导致激光熔焊时外壳和上盖板之间可能存在虚焊，甚至存在无法焊接的问题，本申请一方面提供了一种密封连接件，用于将大容量电池的外壳和任一单体电池的上盖板密封连接，所述外壳上开设有多个用于大容量电池中各单体电池极柱伸出的第一通孔；该密封连接件包括用于套设在单体电池极柱外侧的中空构件；该中空构件的底部用于和所述单体电池的第一区域密封连接，中空构件的顶部与所述外壳的第二区域密封连接；
所述第一区域为位于所述任一单体电池的上盖板中任一极柱周边的区域；
所述第二区域为位于外壳上任一一个第一通孔对应的区域。
本申请采用中空构件使用时，套设在单体电池的极柱外侧，底部用于和单体电池的上盖板密封连接，顶部用于和外壳上与该极柱对应的第一通孔周边区域密封连接，无论外壳和各单体电池上盖板之间是否存在间隙，亦或是间隙尺寸不同，中空构件均可将外壳和单体电池的上盖板进行密封固定，继而确保了大容量电池外壳的密封性，解决了直接将外壳和单体电池上盖板激光熔焊时可能出现的虚焊甚至是无法焊接的问题。
进一步地，中空构件底部外侧设置有用于和单体电池的上盖板焊接的第一环形板。使用时，将中空构件套设于极柱上之后，利用第一环形板焊接于单体电池上盖板上，之后，直接利用中空构件顶部与第一通孔的孔壁进行焊接，或者将中空构件的顶部进行折弯与外壳上位于第一通孔周边的区域进行焊接。
进一步地，为了方便加工以及减少零件的数量，上述中空构件和第一环形板一体成型。
进一步地，上述中空构件顶部外侧设置有用于和所述第二区域焊接的第 二环形板，以及设置在中空构件底部内侧用于和所述第一区域焊接的第三环形板；第三环形板的内径大于单体电池极柱处设置的绝缘密封垫的外径。
使用时，可将单体电池先放入外壳内，确保单体电池伸出第一通孔后，再将中空构件从第一通孔放入，确保第三环形板与单体电池的上盖板接触，第二环形板与外壳外表面接触之后，再分别对第三环形板和第一区域，以及第二环形板与第二区域进行焊接。
进一步地，为了方便加工以及减少零件的数量，上述中空构件、第二环形板以及第三环形板一体成型。
进一步地，上述中空构件侧壁上设置有缓冲形变槽。该缓冲形变槽不仅为密封固定时提供了一定的变形余量，该变形余量可以用来弥补外壳和单体电池之间间隙过大带来的不利于焊接的问题，并且也可弥补单体电池极柱和与之对应的第一通孔同轴度偏差；同时当大容量电池在受到外力或者自身振动时，该缓冲形变槽自身具有一定缓冲作用，确保了密封固定的可靠性。
本申请的第二方面提供一种大容量电池，包括外壳以及N个单体电池，N大于等于2；N个单体电池并联设置，且整体设置于外壳内部；所述外壳上设置有与各单体电池的电解液区连通的电解液共享腔室；其改进之处是：
还包括2N个上述第一方面提供的中空构件；
中空构件的底部和任一单体电池的第一区域密封连接，中空构件的顶部与所述外壳的第二区域密封连接；单体电池的极柱伸出中空构件，且单体电池极柱和中空构件之间保持绝缘。
该大容量电池通过共享腔室可实现各单体电池处于气体平衡和电解液共享的至少一种均一状态，继而使得大容量电池具有更长的循环寿命，并且大容量电池的采用中空构件将外壳和单体电池进行密封连接，不仅密封性好，并且易于装配。
本申请提供以下五种大容量电池的形态：
一、共享腔室为一个，且一体成型于所述外壳底部并与各单体电池内腔的电解液区连通，继而使大容量电池具备了电解液共享的功能，确保了各单体电池电解液一致性。
二、共享腔室为一个，且一体成型于所述外壳顶部并与各单体电池内腔的气体区连通，继而使大容量电池具备了气体平衡的功能，确保了各单体电池气体的一致性。
三、共享腔室为一个，且一体成型于所述外壳顶部并覆盖于各单体电池的泄爆口处，以确保单体电池热失控烟气冲破泄爆口后通过该共享腔室排出。
四、共享腔室为两个，其中一个共享腔室一体成型于所述外壳底部并与各单体电池内腔的电解液区连通，另一个共享腔室一体成型于所述外壳顶部并与各单体电池内腔的气体区连通，继而使大容量电池同时具备了电解液共享和气体平衡的功能，大幅提升了各单体电池气体的一致性。
五、共享腔室为两个，其中一个共享腔室一体成型于所述外壳底部并与各单体电池内腔的电解液区连通，另一个共享腔室一体成型于所述外壳顶部并覆盖于各单体电池的泄爆口处，以确保单体电池热失控烟气冲破泄爆口后通过该共享腔室排出，继而使大容量电池具备了电解液共享功能同时液具备了单一电池泄爆的功能，确保了各单体电池电解液一致性的同时也一定程度上提高了安全性。
附图说明
图1为背景技术中相关技术提出的大容量电池第一种形态结构示意图；
图2为背景技术中相关技术提出的大容量电池第二种形态结构示意图；
图3为背景技术中相关技术提出的大容量电池第三种形态结构示意图；
图4为实施例1提供的密封连接件的结构示意图；
图5为实施例1中密封连接件和单体电池连接后的示意图；
图6为实施例1中密封连接件和大容量电池连接后的示意图；
图7为实施例2提供的密封连接件的结构示意图；
图8为增设缓冲形变槽的密封连接件剖视图；
图9为实施例3中大容量电池的外壳立体图；
图10为实施例3中第一盖板的结构示意图；
图11为实施例3中U形壳体的结构示意图；
图12为实施例5中大容量电池的立体图；
图13为实施例5中大容量电池的外壳立体图；
图14为实施例5中U形壳体的结构示意图；
图15为实施例5中第二盖板的结构示意图；
图16为实施例6中大容量电池结构示意图；
图17为实施例6中大容量电池外壳的结构示意图。
附图标记如下：
1-外壳、11-筒体、12-第一盖板、13-第二盖板、14-U形壳体、15-第三盖板、16-第四盖板、2-单体电池、21-极柱转接件、3-第一通孔、4-共享腔室、5-密封连接件、51-中空构件、52-第一环形板、53-第二环形板、54-第三环形板、55-缓冲形变槽。
具体实施方式
下面将结合的附图，对实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是一部分实施例，而不是全部的实施例。基于以下实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
同时，需要说明的是，文中术语“顶、底、内和外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对技术方案的限制。此外，术语“第一、第二或第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
本申请中除非另有明确的规定和限定，术语“安装、相连、连接”应做广义理解，例如：可以是固定连接、可拆卸连接或一体式连接：同样可以是机械连接、电连接或直接连接，也可以通过中间媒介间接相连，也可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
本申请中密封连接件的基本设计思路是：
为了解决由于加工误差和装配误差造成的大容量电池外壳和各单体电池上盖板之间的间隙过大而导致的两者通过激光熔焊时出现虚焊或无法焊接的 问题。本申请采用了密封连接件解决了以上问题。该密封连接件包括中空构件；该中空构件的底部用于和所述单体电池的第一区域密封连接，中空构件的顶部与所述外壳的第二区域密封连接；第一区域为位于所述任一单体电池的上盖板中任一极柱周边的区域；所述第二区域为位于外壳上任一一个第一通孔对应的区域。
第一通孔对应的区域为外壳外表面上对应任一一个第一通孔的周边区域；或者第一通孔对应的区域为第一通孔孔壁。
其中，极柱周边的区域即为极柱上绝缘密封垫周边的区域。该绝缘密封垫为单体电池上用于使极柱和上盖板之间绝缘的零件。
中空构件大体为一个薄壁的类管状结构，可采用粘接、铆接或焊接的方式分别于单体电池上盖板以及大容量电池的外壳密封连接。中空构件的水平截面可为矩形环或圆形环，为了更好的和第一通孔以及极柱形状适配，通常中空构件截面为圆环形。
由于相对焊接方式来说，粘接的可靠性差，铆接方式不便于装配，因此通常采用焊接的方式将中空构件分别与外壳和单体电池上盖板密封连接。
需要说明的是：本实施例中为了确保大容量电池的外壳、单体电池的上盖组件以及中空构件之间焊接的可操作性和焊接后的可靠性，由于单体电池的外壳均是采用铝制材料制成，因此，中空构件、大容量电池的外壳也采用铝制材料制作。
以下结合几个实施例来对密封连接件、以及采用该密封连接件的大容量电池进行具体说明。
实施例1
如图4所示，本实施例中密封连接件5包括中空构件51以及设置在中空构件51底部的第一环形板52；该第一环形板52可采用焊接的方式固定与中空构件51底部外侧，也可采用折弯的方式在中空构件51底部一体成型出第一环形板52，为了便于加工，通常优选采用折弯的方式在中空构件51上一体成型出第一环形板52。
结合图4至图6，该实施例的密封连接5件在使用时，先将密封连接件5 套设于单体电池2的极柱外，再利用第一环形板52将密封连接件5焊接于单体电池2的上盖板，为了确保中空构件51和单体电池2的上盖板之间焊接的可靠性和密封性，本实施例选用激光熔焊的方式，然后将焊接单体电池2放入外壳1内，接着将该单体电池2上密封连接件5的顶部进行折弯后，使该折弯部分与外壳1上表面接触，最后将折弯部和外壳焊接。为了确保密封连接件5和外壳1之间焊接的可靠性和密封性，本实施例也选用激光熔焊的方式。
在一些其他实施例中，若中空构件51顶部未设置第一环形板52，将中空构件51焊接于上盖板时则无法采用激光熔焊的方式，可能会使得焊接部位的可靠性和密封性都相对较弱。
在一些其他实施例中，若中空构件51底部未通过折弯的方式，将中空构件51焊接于外壳1时则无法采用激光熔焊的方式，可能会使得焊接部位的可靠性和密封性也相对较弱。
在一些其他实施例中，为了使单体电池极柱可以伸出，可利用螺钉连接或者焊接的方式在单体电池已有极柱上增设一个极柱转接件21，以确保极柱可伸出外壳。极柱转接件21的水平截面可以为圆柱形，也可为方形。
实施例2
如图6和图7所示，本实施例中密封连接件5包括中空构件51、中空构件顶部外侧设置有第二环形板53，中空构件底部内侧设置有第三环形板54；第三环形板的内径大于单体电池极柱处设置的绝缘密封垫的外径，位于第二环形板53和第三环形板54之间的中空构件51侧壁外径尺寸小于外壳1上第一通孔3孔径。该第二环形板53、第三环形板54可采用焊接的方式分别固定于中空构件51的顶部和底部(顶部可以是中空构件的顶端或者靠近顶端的部分，优先顶端；底部为中空构件的底端)，也可采用折弯的方式在中空构件51顶部和底部一体成型出第二环形板53以及第三环形板54，为了便于加工，通常优选采用折弯的方式在中空构件上一体成型出第二环形板以及第三环形板。
参见图6，本实施例的密封连接件在使用时，可将单体电池先放入外壳1内，确保单体电池2伸出第一通孔3后，再将密封连接件5从第一通孔3放 入，确保第三环形板54与单体电池的上盖板接触，第二环形板53与外壳外表面接触之后，再分别对第三环形板54和单体电池的上盖板，以及第二环形板53与外壳1外表面进行焊接。为了确保第三环形板54和单体电池上盖板之间，以及第二环形板53与外壳1外表面之间焊接的可靠性和密封性，本实施例选用激光熔焊的方式。
该中空构件结构形式相比实施例1的结构形式，无需额外的折弯操作，提升了工作效率。
另外，如图8所示，本实施例的中空构件51侧壁上还开设有缓冲形变槽55。该缓冲形变槽55不仅为密封固定时提供了一定的变形余量，该变形余量可以用来弥补外壳和单体电池之间间隙过大带来的不利于焊接的问题，并且也可弥补单体电池极柱和与之对应的第一通孔同轴度偏差；同时当大容量电池在受到外力或者自身振动时，该缓冲形变槽自身具有一定缓冲作用，确保了密封固定的可靠性。
当然，该缓冲变形槽55的结构也可适用于实施例1的密封连接件上。
实施例3
本实施例中提供了一种大容量电池，如图6所示，该大容量电池包括外壳1、N个单体电池2以及2N个密封连接件5，N大于等于2；N个单体电池2并联设置，且整体设置于外壳1内部；所述外壳1顶部设置有与各单体电池2的气体区连通的共享腔室4；
密封连接件5的底部和任一单体电池2的第一区域密封连接，密封连接件5的顶部与所述外壳1的第二区域密封连接；单体电池2的极柱伸出密封连接件5，且极柱与密封连接件5之间保持绝缘；绝缘的方式可以为浇注绝缘胶，或绝缘胶套。
其中，密封连接件5采用实施例2中的结构形式，当然实施例1的结构也同样适用。
外壳可采用以下三种形式：
一、参见图9和图10，外壳1包括筒体11、第一盖板12、第二盖板13；筒体11的顶部和底部均为敞口，第一盖板12密封固定(焊接)于筒体11顶 部，第二盖板13密封固定(焊接)于筒体11底部；
第一盖板12上一体成型有一个共享腔室以及2N个第一通孔3，2N个第一通孔3分列共享腔室的两侧。
二、参见图9和图11，外壳1包括U形壳体14、第一盖板12、第三盖板15以及第四盖板16；U形壳体14的顶部、前部和后部均为敞口，第一盖板12密封固定(焊接)于U形壳体14顶部，第三盖板15、第四盖板16分别密封固定(焊接)于U形壳体14的前部和后部。
第一盖板12上一体成型有一个共享腔室，以及2N个第一通孔3，2N个第一通孔3分列共享腔室的两侧。
三、参见图9，外壳1包括筒体11、第三盖板15、第四盖板16；筒体11的前部和后部均为敞口，第三盖板15密封固定(焊接)于筒体11前部，第四盖板16密封固定(焊接)于筒体后部；
筒体11的顶部一体成型有一个共享腔室以及2N个第一通孔3，2N个第一通孔3分列共享腔室的两侧。
以上三种方式的外壳中，筒体11和U形壳体14可通过焊接的方式拼接而成，也可采用铸造或冲压等方式一体成型，为了便于加工同时确保密封性，通常选择一体成型的方式。
实施例4
参见图5，本实施例的大容量电池结构与实施例3基本一致，不同之处是：单体电池的气体口为泄爆部，此时共享腔室覆盖泄爆部，当单体电池发生热失控时，热失控烟气冲破泄爆口后可通过该共享腔室排出。
实施例5
如图12所示，本实施例的大容量电池结构与实施例3基本一致，也仅仅只有一个共享腔室，不同之处是：共享腔室设置于外壳底部，用于将各单体电池内腔的电解液区连通。由于各单体电池共享电解液，因此本实施例中多个单体电池需要并联设置。
当在电解液作用或外力作用下各单体电池下盖组件上的密封机构开启，则各单体电池的电解液区与共享腔室连通，继而使得各单体电池处于一个共 同电解液体系下，提升了大容量电池性能和循环寿命。
大容量电池的外壳可采用以下三种形式构成：
一、参见图13和图15所示，外壳1包括筒体11、第一盖板12、第二盖板13；筒体11的顶部和底部均为敞口，第一盖板12密封固定(焊接)于筒体11顶部，第二盖板13密封固定(焊接)于筒体11底部；
第一盖板12上设置有2N个第一通孔3，第二盖板13上一体成型有一个共享腔室。
二、参见图13和图14，外壳1包括U形壳体14、第一盖板12、第三盖板15以及第四盖板16；U形壳体14的顶部、前部和后部均为敞口，第一盖板12密封固定(焊接)于U形壳体14顶部，第三盖板15、第四盖板16分别密封固定(焊接)于U形壳体14的前部和后部。
第一盖板12上设置有2N个第一通孔3，U形壳体14的底部上一体成型有一个共享腔室。
三、参见图13，外壳1包括筒体11、第三盖板15、第四盖板16；筒体11的前部和后部均为敞口，第三盖板15密封固定(焊接)于筒体11前部，第四盖板16密封固定(焊接)于筒体后部；
筒体11的顶部设置有2N个第一通孔3，筒体11底部一体成型有一个共享腔室。
以上三种方式的外壳中，筒体11和U形壳体14可通过焊接的方式拼接而成，也可采用铸造或冲压等方式一体成型，为了便于加工同时确保密封性，通常选择一体成型的方式。
实施例6
如图16所示，本实施例是在实施例5的基础上(可共享电解液)，在外壳顶部增设一个共享腔室4；也就是说本实施例的大容量电池上具有两个共享腔室4。
当外壳顶部增设的共享腔室4与各单体电池内腔的气体区连通时，使得大容量电池同时具备了电解液共享和气体平衡的功能，大幅提升了各单体电池气体的一致性。
当外壳顶部增设的共享腔室4覆盖于各单体电池2的泄爆部时，使得大容量电池具备了电解液共享功能同时液具备了单一电池泄爆的功能，确保了各单体电池电解液一致性的同时也一定程度上提高了安全性。
本实施例中大容量电池的外壳可采用以下三种形式构成：
一、参见图17，外壳1包括筒体11、第一盖板12、第二盖板13；筒体11的顶部和底部均为敞口，第一盖板12密封固定(焊接)于筒体11顶部，第二盖板13密封固定(焊接)于筒体11底部；
参见图10，第一盖板12上设置有2N个第一通孔3以及一体成型有一个共享腔室，参见图15，第二盖板13上同样一体成型有一个共享腔室。
二、参见图17，外壳1包括U形壳体14、第一盖板12、第三盖板15以及第四盖板16；U形壳体14的顶部、前部和后部均为敞口，第一盖板12密封固定(焊接)于U形壳体14顶部，第三盖板15、第四盖板16分别密封固定(焊接)于U形壳体14的前部和后部。
参见图10，第一盖板12上设置有2N个第一通孔3以及一体成型有一个共享腔室，参见图14，U形壳体14的底部同样一体成型有一个共享腔室。
三、参见图17，外壳1包括筒体11、第三盖板15、第四盖板16；筒体11的前部和后部均为敞口，第三盖板14密封固定(焊接)于筒体11前部，第四盖板16密封固定(焊接)于筒体后部；
筒体11的顶部设置有2N个第一通孔3以及一体成型有一个共享腔室，筒体11底部同样一体成型有一个共享腔室。
以上三种方式的外壳中，筒体11和U形壳体14可通过焊接的方式拼接而成，也可采用铸造或冲压等方式一体成型，为了便于加工同时确保密封性，通常选择一体成型的方式。

Claims (9)

  1. 一种密封连接件，其特征在于，用于将大容量电池的外壳和任一单体电池的上盖板密封连接，所述外壳上开设有多个用于大容量电池中各单体电池极柱伸出的第一通孔；该密封连接件包括中空构件；该中空构件的底部用于和所述单体电池的第一区域密封连接，中空构件的顶部与所述外壳的第二区域密封连接；
    所述第一区域为位于所述任一单体电池的上盖板中任一极柱周边的区域；
    所述第二区域为位于外壳上任一一个第一通孔对应的区域。
  2. 根据权利要求1所述的密封连接件，其特征在于，中空构件底部外侧设置有用于和单体电池的上盖板焊接的第一环形板。
  3. 根据权利要求2所述的密封连接件，其特征在于，中空构件和第一环形板一体成型。
  4. 根据权利要求1所述的密封连接件，其特征在于，中空构件顶部外侧设置有用于和所述第二区域焊接的第二环形板，以及设置在中空构件底部内侧用于和所述第一区域焊接的第三环形板；第三环形板的内径大于单体电池极柱处设置的绝缘密封垫的外径。
  5. 根据权利要求4所述的密封连接件，其特征在于，中空构件、第二环形板以及第三环形板一体成型。
  6. 根据权利要求2-5任一项所述的密封连接件，其特征在于，所述中空构件顶部和底部之间的侧壁上设置有缓冲形变槽。
  7. 一种大容量电池，包括外壳以及N个单体电池，N大于等于2；N个单体电池并联设置，且整体设置于外壳内部；所述外壳上设置有与各单体电池的内腔连通的共享腔室；其特征在于：
    还包括2N个如权利要求1-6任一项所述的中空构件；
    中空构件的底部和任一单体电池的第一区域密封连接，中空构件的顶部与所述外壳的第二区域密封连接；单体电池的极柱伸出中空构件，且单体电池极柱和中空构件之间保持绝缘。
  8. 根据权利要求7所述的一种大容量电池，其特征在于：所述共享腔室 为一个，且一体成型于所述外壳底部并与各单体电池内腔的电解液区连通；
    或者，所述共享腔室为一个，且一体成型于所述外壳顶部并与各单体电池内腔的气体区连通；
    或者，所述共享腔室为一个，且一体成型于所述外壳顶部并覆盖于各单体电池的泄爆口处，以确保单体电池热失控烟气冲破泄爆口后通过该共享腔室排出。
  9. 根据权利要求7所述的一种大容量电池，其特征在于，所述共享腔室为两个，其中一个共享腔室一体成型于所述外壳底部并与各单体电池内腔的电解液区连通，另一个共享腔室一体成型于所述外壳顶部并与各单体电池内腔的气体区连通；
    或者，所述共享腔室为两个，其中一个共享腔室一体成型于所述外壳底部并与各单体电池内腔的电解液区连通，另一个共享腔室一体成型于所述外壳顶部并覆盖于各单体电池的泄爆口处，以确保单体电池热失控烟气冲破泄爆口后通过该共享腔室排出。
PCT/CN2024/096992 2023-06-06 2024-06-03 一种密封连接件及大容量电池 Ceased WO2024251067A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202310662889.9 2023-06-06
CN202310662889.9A CN117477188B (zh) 2023-06-06 2023-06-06 一种大容量电池

Publications (1)

Publication Number Publication Date
WO2024251067A1 true WO2024251067A1 (zh) 2024-12-12

Family

ID=89636744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/096992 Ceased WO2024251067A1 (zh) 2023-06-06 2024-06-03 一种密封连接件及大容量电池

Country Status (2)

Country Link
CN (1) CN117477188B (zh)
WO (1) WO2024251067A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117673633B (zh) * 2023-06-06 2025-08-22 陕西奥林波斯电力能源有限责任公司 一种上盖组件、单体电池及大容量电池
EP4726890A1 (en) * 2023-06-06 2026-04-15 D-Aus Energy Storage Technology (Xi'an) Co., Ltd High-capacity battery, battery cell, sealing connector, and upper cover assembly
CN117477188B (zh) * 2023-06-06 2025-08-22 陕西奥林波斯电力能源有限责任公司 一种大容量电池

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007234393A (ja) * 2006-03-01 2007-09-13 Matsushita Electric Ind Co Ltd 密閉型二次電池
CN103378321A (zh) * 2012-04-20 2013-10-30 比亚迪股份有限公司 一种盖板组件及含有该盖板组件的电池
CN207818744U (zh) * 2018-01-31 2018-09-04 宁德时代新能源科技股份有限公司 电池模组
CN111009626A (zh) * 2018-10-08 2020-04-14 三星Sdi株式会社 电池组
CN114865179A (zh) * 2022-05-30 2022-08-05 天津市捷威动力工业有限公司 一体式极柱、顶盖组件、电池及电池模组
CN117477188A (zh) * 2023-06-06 2024-01-30 陕西奥林波斯电力能源有限责任公司 一种密封连接件及大容量电池

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115498331B (zh) * 2022-09-21 2024-01-26 武汉富航精密工业有限公司 一种二次电池盖板结构组件及生产工艺
CN115621653A (zh) * 2022-09-27 2023-01-17 吴军 一种锂电池模组
CN116111201B (zh) * 2023-04-11 2023-09-08 陕西奥林波斯电力能源有限责任公司 一种大容量电池及该大容量电池的制作方法
CN220324675U (zh) * 2023-06-06 2024-01-09 陕西奥林波斯电力能源有限责任公司 一种密封连接件及大容量电池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007234393A (ja) * 2006-03-01 2007-09-13 Matsushita Electric Ind Co Ltd 密閉型二次電池
CN103378321A (zh) * 2012-04-20 2013-10-30 比亚迪股份有限公司 一种盖板组件及含有该盖板组件的电池
CN207818744U (zh) * 2018-01-31 2018-09-04 宁德时代新能源科技股份有限公司 电池模组
CN111009626A (zh) * 2018-10-08 2020-04-14 三星Sdi株式会社 电池组
CN114865179A (zh) * 2022-05-30 2022-08-05 天津市捷威动力工业有限公司 一体式极柱、顶盖组件、电池及电池模组
CN117477188A (zh) * 2023-06-06 2024-01-30 陕西奥林波斯电力能源有限责任公司 一种密封连接件及大容量电池

Also Published As

Publication number Publication date
CN117477188A (zh) 2024-01-30
CN117477188B (zh) 2025-08-22

Similar Documents

Publication Publication Date Title
US9136520B2 (en) Battery module
EP2579358B1 (en) Battery pack having novel structure
CN113991186A (zh) 一种电池装配方法及锂电池
US20040126651A1 (en) Lithium secondary battery
CN117477188B (zh) 一种大容量电池
CN110176557A (zh) 二次电池及其顶盖组件
CN113314760B (zh) 电芯的制造方法及电芯
JP2005332820A (ja) 電極組立体を有する二次電池
WO2024251066A1 (zh) 一种上盖组件、单体电池及大容量电池
CN114639926A (zh) 电池及电池的装配方法
KR101232783B1 (ko) 이차 전지 및 그 제조 방법
KR100477754B1 (ko) 전지 팩
WO2024251065A1 (zh) 一种大容量电池的制备工艺
CN220324675U (zh) 一种密封连接件及大容量电池
CN223321409U (zh) 电池壳体及单体电池
CN220306446U (zh) 电芯及包含其的电池模组
CN220585411U (zh) 一种上盖组件、单体电池及大容量电池
WO2025161651A1 (zh) 一种电池盖板、电池封装件及电池
CN219575783U (zh) 电池单体、电池及用电设备
CN221041293U (zh) 一种大容量电池及单体电池
WO2024198971A1 (zh) 电池单体、电池及用电设备
KR20230172401A (ko) 이차전지 셀
CN222088731U (zh) 一种盖板组件、壳组件及电池
CN223333875U (zh) 电池盖板组件及单体电池
CN222995756U (zh) 电芯及电池包

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: 24818599

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE