CN114865193A - Battery package and vehicle - Google Patents

Battery package and vehicle Download PDF

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Publication number
CN114865193A
CN114865193A CN202210420095.7A CN202210420095A CN114865193A CN 114865193 A CN114865193 A CN 114865193A CN 202210420095 A CN202210420095 A CN 202210420095A CN 114865193 A CN114865193 A CN 114865193A
Authority
CN
China
Prior art keywords
assembly
battery pack
plate
battery
lower cover
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.)
Pending
Application number
CN202210420095.7A
Other languages
Chinese (zh)
Inventor
邱文聪
李凡
陈智伟
陈朝海
冯炎强
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.)
Hubei Eve Power Co Ltd
Original Assignee
Hubei Eve Power 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 Hubei Eve Power Co Ltd filed Critical Hubei Eve Power Co Ltd
Priority to CN202210420095.7A priority Critical patent/CN114865193A/en
Publication of CN114865193A publication Critical patent/CN114865193A/en
Priority to EP22817513.9A priority patent/EP4276990A1/en
Priority to US18/002,816 priority patent/US20240120592A1/en
Priority to PCT/CN2022/126338 priority patent/WO2023173739A1/en
Pending 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses a battery pack and a vehicle, and belongs to the technical field of power batteries. The battery pack comprises a bottom plate assembly, an edge beam assembly and a plurality of battery cell groups, wherein the edge beam assembly is arranged on the periphery of the bottom plate assembly, the edge beam assembly and the bottom plate assembly are enclosed into an accommodating cavity, and the accommodating cavity comprises one or more than two mounting areas; the battery cell group is installed to every installing zone, and every group battery cell group includes a plurality of electric cores, and electric core is fixed to be set up on the bottom plate subassembly. According to the battery pack and the vehicle, each battery cell is fixedly arranged on the bottom plate assembly of the installation area, a plurality of battery cells installed in the same installation area form a battery cell group, and the battery cells are grouped and modularized, so that the number of components is reduced, and the cost is reduced; the volume is reduced, and the energy density of the battery pack is improved.

Description

Battery package and vehicle
Technical Field
The invention relates to the technical field of power batteries, in particular to a battery pack and a vehicle.
Background
Among the prior art, the battery package includes the box and locates a plurality of battery modules in the box, and the battery module includes a plurality of electric cores and is used for encapsulating the shell frame of a plurality of electric cores, and the battery module is connected through unified border and box and other structures in the box. Because battery module includes structures such as shell frame, leads to spare part numerous, has improved the cost, and occupies great space, has reduced the energy density of battery package.
Disclosure of Invention
The invention aims to provide a battery pack and a vehicle, wherein an electric core group in the battery pack is modularized and grouped, the structure of the electric core group is simplified, the cost is reduced, and the energy density of the battery pack is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, there is provided a battery pack including:
a base plate assembly;
the edge beam assembly is arranged on the periphery of the bottom plate assembly, the edge beam assembly and the bottom plate assembly are enclosed into an accommodating cavity, and the accommodating cavity comprises one or more than two mounting areas;
the installation area is provided with the electric core groups, each electric core group comprises a plurality of electric cores, and the electric cores are fixedly arranged on the bottom plate component.
Optionally, the installation structure further comprises a frame assembly arranged in the accommodating cavity and dividing the accommodating cavity into the installation area.
Optionally, the frame assembly includes one or more first beams, and when the first beams are plural, the plural first beams are arranged in parallel at intervals to divide the accommodating cavity into plural mounting areas.
Optionally, the frame assembly further includes a longitudinal beam, and the longitudinal beam and the first cross beam form a cross beam, and the cross beam divides the accommodating cavity into a plurality of mounting areas.
Optionally, the frame assembly further includes a second beam dividing the accommodating chamber into a first region and a second region, the plurality of mounting regions are disposed in the first region, and the electrical component is disposed in the second region.
Optionally, the electric cell assembly further comprises a wire harness module arranged on one side, away from the bottom plate assembly, of the electric cell assembly, and the wire harness module is electrically connected to the electric cell assembly.
Optionally, the wire harness module further comprises a liquid cooling plate, and the liquid cooling plate is bonded to one side, away from the electric core group, of the wire harness module.
Optionally, when the accommodating cavity is divided into a first area and a second area, and the first area includes a plurality of mounting areas, a support plate is arranged on the second area;
the bottom plate assembly comprises an outer plate and an inner plate, the outer plate and the inner plate form a first pressure relief cavity, and the battery core in the battery core group is blocked at one side of the first pressure relief cavity;
the supporting plate and the inner plate form a second pressure relief cavity, and the other side of the first pressure relief cavity is communicated with the second pressure relief cavity;
the inner cavity of the boundary beam assembly forms a third pressure relief cavity, the second pressure relief cavity is communicated with the third pressure relief cavity, and a pressure relief valve communicated with the third pressure relief cavity is installed on the boundary beam assembly.
Optionally, the inner plate includes a loading plate and a partition plate, the battery cell is plugged at one side of the first through hole of the loading plate, the partition plate and the support plate form the second pressure relief cavity, and the first pressure relief cavity is communicated with the second pressure relief cavity through the second through hole of the partition plate.
Optionally, a filter screen plate is arranged on the second through hole of the partition plate.
Optionally, a partition wall is arranged in the third pressure relief cavity, so that the third pressure relief cavity comprises a plurality of cavities which are communicated with each other.
Optionally, the battery further comprises a mounting seat assembly, and each battery cell is mounted on the bottom plate assembly through the mounting seat assembly.
Optionally, the mount pad subassembly includes the lower cover, the lower cover has and is used for the holding the spacing groove of electricity core, the lower cover deviates from one side of electricity core is equipped with connecting portion, the lower cover can pass through connecting portion are fixed in the bottom plate subassembly.
Optionally, the lower cover includes a first gluing groove, the first gluing groove is used for accommodating a structural glue, and the battery cell is bonded to the lower cover through the structural glue; and/or
The lower cover comprises a second glue beating groove, the second glue beating groove is used for accommodating the structural glue, and the lower cover is bonded to the bottom plate assembly through the structural glue.
Optionally, the bottom plate assembly includes a bearing plate, and the lower cover is mounted on the bearing plate.
Optionally, still include the pencil module, the first electrode and the second electrode of electricity core are located same one side, mount pad subassembly still include with the upper cover that the lower cover set up relatively, it establishes to go up the housing the electricity core is equipped with the first electrode with one side of second electrode, just the first electrode with the second electrode expose in the upper cover, expose the first electrode with expose the second electrode with the pencil module is connected.
Optionally, two adjacent upper covers can be clamped.
In another aspect, a vehicle is provided, which includes the battery pack.
The invention has the beneficial effects that:
according to the battery pack and the vehicle provided by the invention, each battery cell is fixedly arranged on the bottom plate assembly of the installation area, a plurality of battery cells installed in the same installation area form a battery cell group, and the battery cells are grouped and modularized, so that the number of components is reduced, and the cost is reduced; the volume is reduced, and the energy density of the battery pack is improved.
Drawings
Fig. 1 is an exploded view of a battery pack according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a partial battery pack at a viewing angle according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged view taken at I in FIG. 3
Fig. 5 is a schematic view of a portion of a battery pack from another perspective according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a second edge beam provided in accordance with an embodiment of the present invention;
fig. 7 is an assembly schematic diagram of a battery cell and a mounting base assembly according to an embodiment of the invention;
FIG. 8 is a schematic view of the assembly of the electric core assembly with a corresponding number of mounting assemblies according to the embodiment of the present invention;
FIG. 9 is an enlarged view taken at point II of FIG. 8;
FIG. 10 is a schematic view of a view angle lower cover according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a lower cover with another view angle according to an embodiment of the present invention.
In the figure:
1. a base plate assembly; 11. an outer plate; 12. an inner plate; 121. a carrier plate; 1211. a first through hole; 122. a partition plate; 1A, a first pressure relief cavity;
2. a side rail assembly; 21. a partition wall; 22. a first edge beam; 23. a second edge beam; 231. a horizontal edge beam; 2311. a pressure relief vent; 232. a vertical edge beam; 24. a third edge beam; 25. a fourth edge beam; 2A, a third pressure relief cavity;
3. a support plate; 3A, a second pressure relief cavity;
4. mounting a base assembly; 41. an upper cover; 411. a first annular cylinder; 412. a second annular cylinder; 413. a connecting plate; 414. a baffle plate; 415. a second buckle; 416. a second card slot; 42. a lower cover; 421. a limiting groove; 422. a first buckle; 423. a first glue storage tank; 424. a second glue storage tank; 425. a limiting bulge; 426. a base plate; 427. a side plate;
5. a top plate assembly; 6. a liquid-cooled plate; 7. a wire harness module;
81. mounting a bar; 82. a fastener; 83. a fixing member;
9. the electric core group; 91. an electric core; 911. a first electrode; 912. a second electrode;
10. a frame assembly; 101. a first cross member; 102. a stringer; 103. a second cross member;
100. a pressure relief valve; 110. a sealing strip;
m, a first region; n, a second area.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The embodiment provides a vehicle, including the battery package, for reduce cost, reduce the volume of battery package and make things convenient for its overall arrangement in the vehicle, improve the energy density of battery package, this embodiment still provides a battery package.
Specifically, as shown in fig. 1 and fig. 2, the battery pack includes a bottom plate assembly 1, an edge beam assembly 2 and a plurality of battery cell groups 9, the edge beam assembly 2 is arranged at the periphery of the bottom plate assembly 1, the edge beam assembly 2 and the bottom plate assembly 1 enclose to form an accommodating cavity, and the accommodating cavity includes one or more than two mounting areas; the electric core group 9 is provided with more than a set of or two sets of, and electric core group 9 quantity is corresponding with installing zone quantity, and electric core group 9 is installed to every installing zone, and every electric core group 9 of group includes a plurality of electric cores 91, and electric core 91 is fixed to be set up on bottom plate subassembly 1.
Each battery cell 91 is fixedly arranged on the bottom plate assembly 1 of the installation area, a plurality of battery cells 91 arranged in the same installation area form a battery cell group 9, and the battery cells 91 are modularized in groups, so that the number of parts is reduced, and the cost is reduced; the volume is reduced, and the energy density of the battery pack is improved. Specifically, the battery includes one or more battery cell groups 9 therein, without limitation.
Optionally, as shown in fig. 1, the battery pack further includes a top plate assembly 5, the top plate assembly 5 is disposed on a side of the boundary beam assembly 2 away from the bottom plate assembly 1, the battery cell assembly 9 is located between the top plate assembly 5 and the bottom plate assembly 1, and the top plate assembly 5, the bottom plate assembly 1 and the boundary beam assembly 2 are connected to form a battery box body. Further, sealing strips 110 are respectively arranged between the top plate assembly 5 and the edge beam assembly 2 and between the bottom plate assembly 1 and the edge beam assembly 2 so as to seal the battery box body.
Optionally, as shown in fig. 1, the battery pack further includes a frame assembly 10, the frame assembly 10 is disposed in the accommodating cavity, the accommodating cavity is divided into installation areas, the frame assembly 10 is arranged to separate the installation areas, mutual influence of structures between different areas is avoided, and the frame assembly 10 is disposed in the battery box body, so that structural strength of the battery box body is improved.
Optionally, as shown in fig. 3 to 5, the battery pack further includes an electrical component, the frame assembly 10 further includes a second beam 103, the second beam 103 divides the accommodating cavity into a first region M and a second region N, the plurality of mounting regions are disposed in the first region M, the electrical component is disposed in the second region N, the second region N is located at the front end of the first region M, and the second beam 103 separates the electric core group 9 from the electrical component, so as to prevent the electrical component from being damaged when the electric core 91 is out of control, so as to control the system, and the like.
Alternatively, as shown in fig. 3-5, the frame assembly 10 includes one or more first beams 101, and when one first beam 101 is provided, the receiving cavity is divided into two mounting areas; when a plurality of first beams 101 are arranged, the plurality of first beams 101 are arranged in parallel at intervals to divide the accommodating cavity into a plurality of installation areas so as to prevent other electric core groups 9 from being damaged when the electric core 91 in one electric core group 9 is out of thermal runaway, and specifically, the plurality of first beams 101 divide the first area M into a plurality of installation areas arranged along one row or one column; the first beam 101 and the second beam 103 may be disposed in parallel, or disposed vertically, or disposed at other angles, which is not limited.
Optionally, as shown in fig. 5, the frame assembly 10 further includes a longitudinal beam 102, and the longitudinal beam 102 and the first cross beam 101 form a cross beam, which divides the receiving cavity into a plurality of mounting areas. In this embodiment, the cross beam divides the first region M into four mounting regions, which further improves structural strength. In other embodiments, a plurality of cross beams may be provided, and the first area M may be divided into eight mounting areas or more; the cross beam structure further improves the structural strength of the battery box body.
Alternatively, as shown in fig. 5, the first cross beam 101 is connected to the floor assembly 1 and the edge beam assembly 2 through the fixing member 83, so as to improve the structural strength; specifically, the fixing member 83 may be a combination of a long screw rod and a nut, the long screw rod penetrates through the bottom plate assembly 1 and the first cross beam 101, and the nut abuts against one side of the bottom plate assembly 1 away from the first cross beam 101. Likewise, the longitudinal beam 102 and the second transverse beam 103 may be connected to the floor module 1 by the fixing member 83.
Optionally, as shown in fig. 1, the battery pack further includes a wire harness module 7 disposed on a side of the electric core assembly 9 departing from the bottom plate assembly 1, the wire harness module 7 is electrically connected to the electric core assembly 9, specifically, the wire harness module 7 includes a bus bar and the like, and the bus bar connects the adjacent electric cores 91 to realize series connection and parallel connection. Optionally, as shown in fig. 1, the battery pack further includes a liquid cooling plate 6 for cooling the electric core 91, the liquid cooling plate 6 is disposed on one side of the electric core set 9 departing from the bottom plate assembly 1, that is, the liquid cooling plate 6 is disposed on the top of the electric core 91, and since the heat conduction effect in the height direction of the electric core 91 is better, the cooling effect is improved. Optionally, the liquid cooling plate 6 is a whole plate and is arranged on the tops of the plurality of electric core groups 9 and the electric elements at the same time, so that the structure is simplified, and the assembly is convenient; specifically, the liquid cooling plate 6 is arranged in the battery box body, and the shape of the liquid cooling plate is adapted to the shape of the bottom plate assembly 1. The liquid cooling plate 6 is bonded on one side, away from the electric core group 9, of the wire harness module 7, and the rigidity and the strength of the battery pack are increased.
Optionally, as shown in fig. 2 to fig. 5, the accommodating cavity is divided into a first area M and a second area N, the first area M includes a plurality of installation areas, the second area N is provided with the support plate 3, the bottom plate assembly 1 includes an outer plate 11 and an inner plate 12, the outer plate 11 and the inner plate 12 form a first pressure relief cavity 1A, and the battery cells 91 in the battery cell group 9 are blocked at one side of the first pressure relief cavity 1A; the support plate 3 and the inner plate 12 form a second pressure relief cavity 3A, and the other side of the first pressure relief cavity 1A is communicated with the second pressure relief cavity 3A; the inner chamber of boundary beam subassembly 2 forms third pressure release chamber 2A, and second pressure release chamber 3A and third pressure release chamber 2A intercommunication install the relief valve 100 with third pressure release chamber 2A intercommunication on the boundary beam subassembly 2.
When one or more of the battery cells 91 are out of control thermally, high-temperature substances sprayed by the battery cells 91 in which the out of control thermally occurs are diffused in the first pressure relief cavity 1A, and the first pressure relief layer is separated from the battery cell layer, so that other battery cells 91 on the upper layer of the inner plate 12 are not affected during pressure relief, and the influence on other battery cells 91 is avoided; the first pressure relief cavity 1A, the second pressure relief cavity 3A and the third pressure relief cavity 2A form a pressure relief channel, and high-temperature substances are relieved through the pressure relief valve 100 after passing through the channel. High-temperature material is through first pressure release chamber 1A, second pressure release chamber 3A, third pressure release chamber 2A, and a large amount of heats can be taken away respectively to three pressure release chamber structure, forms the cubic cooling, and high-temperature material is less than the ignition point when reaching box relief valve 100 positions, reaches never effect of starting a fire, better safe and reliable.
Optionally, as shown in fig. 5, the inner plate 12 includes a loading plate 121 and a partition plate, the battery cell 91 is sealed at one side of a first through hole 1211 of the loading plate 121, and a high-temperature substance ejected from the battery cell 91 that is out of thermal runaway enters the first pressure relief cavity 1A through the first through hole 1211 and diffuses, so that the first pressure relief cavity 1A is separated from other battery cells 91 in the battery cell group 9, in this embodiment, the battery cell 91 is a cylindrical battery cell, the first through hole 1211 is a circular hole, and a bottom area of the cylindrical battery cell is not smaller than a cross-sectional area of the first through hole 1211, so as to ensure that the high-temperature substance enters the first pressure relief cavity 1A as much as possible, and avoid leakage and affecting other battery cells 91; specifically, the bearing plate 121 is formed with a plurality of first through holes 1211, and the plurality of first through holes 1211 are arranged in a plurality of rows or in a matrix, so that the bearing plate 121 is a honeycomb plate.
In other embodiments, the battery cell 91 may also be a square battery cell, and the structures of the carrier plate 121 and the first through hole 1211, etc. may be correspondingly arranged, without limitation.
The partition plate 122 and the support plate 3 form a second pressure relief cavity 3A, and the first pressure relief cavity 1A and the second pressure relief cavity 3A are communicated through a second through hole in the partition plate 122. Further optionally, a screen plate is disposed on the second through hole of the partition plate 122. Be equipped with a lot of apertures on the filter plate, prevent that large granule material from getting into second pressure release chamber 3A, avoid electric core 91 spun high temperature material to cause the pressure release passageway to block up, cause the pressure release unsmooth, filter high temperature material through the filter plate, but later stage regular replacement filter plate. In this embodiment, the phase change material layer is pasted on the filter screen plate, and the temperature of high temperature material can be greatly reduced by the phase change material layer.
Alternatively, the outer plate 11 is a steel plate, has a high melting point, is not easily melted, and can cool a high-temperature substance.
Optionally, as shown in fig. 6, a partition wall 21 is disposed in the third pressure relief cavity 2A, so that the third pressure relief cavity 2A includes a plurality of cavities that are communicated with each other, and a plurality of partition walls 21 may be disposed in parallel at intervals to form an S-shaped cavity; or a plurality of partition walls 21 are arranged at intervals, included angles can be formed among the partition walls 21 to form a plurality of cavities, holes are formed in the partition walls 21, and the cavities are communicated with one another; or a plurality of separating walls 21 with different shapes, such as one of a T shape, an L shape, a plurality of continuous L shapes, a cross shape, a concave shape or a combination shape, etc., are arranged, so that the third pressure relief cavity 2A forms a "labyrinth" cavity structure, and the structural shape and the splicing shape of the separating walls 21 can refer to the prior art to form a labyrinth with a simple shape or a complex shape, without limitation. When the high-temperature substance flows in the third pressure relief cavity 2A, the length of the third pressure relief cavity 2A is increased, the pressure relief time is prolonged, and the temperature of the high-temperature substance is reduced.
Optionally, as shown in fig. 5 and 6, the cross section of the second region N is an isosceles trapezoid, the edge beam assembly 2 includes a first edge beam 22 and second edge beams 23 symmetrically communicated with two ends of the first edge beam 22, the second edge beam 23 is provided with pressure relief holes 2311, the second pressure relief cavity 3A is communicated with the third pressure relief cavity 2A through the pressure relief holes 2311, the two symmetrical second edge beams 23 are provided with the pressure relief holes 2311, and the high-temperature substances are respectively output to two sides from the two second edge beams 23, so that the high-temperature substances are dispersed, and the temperature reduction is facilitated.
Optionally, as shown in fig. 6, the cross section of the second side beam 23 is L-shaped, and includes a horizontal side beam 231 and a vertical side beam 232 which are communicated with each other, the horizontal side beam 231 is located in the second region N, the second pressure relief cavity 3A is communicated with the horizontal side beam 231, and the length of the third pressure relief cavity 2A is extended by providing the L-shaped side beam assembly 2. In this embodiment, horizontal boundary beam 231 is equipped with a plurality of cavitys of arranging along the horizontal direction, and vertical boundary beam 232 is equipped with a plurality of cavitys of arranging along vertical direction, and division wall 21 is equipped with the opening and makes intercommunication between the cavity.
Optionally, two second boundary beams 23 are symmetrical along the symmetry plane, and the pressure release valve 100 is provided with two, and two pressure release valves 100 are installed in one side of first region M deviating from second region N, and extension high temperature material delivery path, and two pressure release valves 100 are symmetrical along the symmetry plane, and two boundary beams 23 and two pressure release valves 100 are symmetrical along the same symmetry plane promptly, reduce pressure release valve 100 pressure release pressure, improve the reliability.
Specifically, as shown in fig. 5, the edge beam assembly 2 further includes a fourth edge beam 25 parallel to the first edge beam 22, and a third edge beam 24 connecting the second edge beam 23 and the fourth edge beam 25, the pressure relief valve 100 is mounted on the fourth edge beam 25, and the output path of the high-temperature substance in the third pressure relief cavity 2A is the second edge beam 23, the third edge beam 24, the fourth edge beam 25, and the pressure relief valve 100 on the corresponding side.
Optionally, as shown in fig. 4, the battery box further includes a mounting bar 81 and a fastener 82, and the fastener 82 sequentially penetrates through the mounting bar 81, the bottom plate assembly 1 and the edge beam assembly 2, so that the mounting bar 81, the bottom plate assembly 1 and the edge beam assembly 2 are connected.
Optionally, as shown in fig. 1, fig. 7 and fig. 8, the battery pack further includes a mounting base assembly 4, each electric core 91 in the electric core assembly 9 is mounted on the bottom plate assembly 1 through the mounting base assembly 4, the electric cores 91 are assembled in groups and can be spliced, and the battery pack is convenient to mount. A plurality of electric cores 91 accessible mount pad subassembly 4 splice on base plate subassembly 1, carry out the quantity that sets up electric core 91 and mount pad subassembly 4 according to battery package capacity, the size and the shape of base plate subassembly 1 adaptability, can arrange the series-parallel connection at will, and the mode of grouping is more nimble, and is compatible stronger.
Optionally, as shown in fig. 7 to 11, the mount assembly 4 includes a lower cover 42, where the lower cover 42 has a limiting groove 421 for accommodating the battery cell 91, and the battery cell 91 is fixed in the limiting groove 421 for positioning the battery cell 91, so as to improve the positioning accuracy. One side that lower cover 42 deviates from electric core 91 is equipped with connecting portion, and lower cover 42 can be fixed in bottom plate subassembly 1 through connecting portion, improves the connection reliability between electric core 91 and the bottom plate subassembly 1, and lower cover 42 structure is small, and preparation and simple to operate practice thrift the cost.
Optionally, as shown in fig. 1, 7 to 9, the battery pack further includes a wire harness module 7, the first electrode 911 and the second electrode 912 of the battery cell 91 are located on the same side, the mount base assembly 4 further includes an upper cover 41 disposed opposite to the lower cover 42, the upper cover 41 covers the side of the battery cell 91 where the first electrode 911 and the second electrode 912 are disposed, the first electrode 911 and the second electrode 912 are exposed from the upper cover 41, and the exposed first electrode 911 and the exposed second electrode 912 are connected to the wire harness module 7.
During assembly, two ends of the battery cell 91 are respectively connected to the upper cover 41 and the lower cover 42, and for convenience of description, the battery cell 91 is installed on the upper cover 41 and the lower cover 42 to form a battery cell assembly body, so that the structure is simple and the assembly is convenient; when the electric core group 9 comprises a plurality of electric cores 91, a plurality of mounting base assemblies 4 with the same number as the electric cores 91 are arranged at the same time to form a plurality of electric core assembly bodies, and then the electric core assembly bodies are fixed on the bottom plate assembly 1 through the lower cover 42, so that the connection reliability is improved. The electric core assembly body can splice, sets up mount pad subassembly 4 according to electric core 91's in the electric core group 9 quantity, and the cluster that can arrange at will is parallelly connected, and is compatible stronger, and simple to operate need not to carry out the customization according to battery module model to mount pad subassembly 4, practices thrift the cost. Specifically, the upper cover 41 and the lower cover 42 can be manufactured according to the model of the battery cell 91, and the same kind of upper cover 41 and the same kind of lower cover 42 can be used for the same kind of battery cell 91, so that mass production can be performed, the cost can be further reduced, and the construction period can be shortened. The upper cover 41 and the lower cover 42 are used for protecting the battery cell 91, and the upper cover 41 and the lower cover 42 are used for limiting the battery cell 91, so that the reliability of installation in the battery box is improved.
Specifically, the upper cover 41 is a plastic cover, and the lower cover 42 is a plastic seat, which has an insulating effect to prevent short circuit between different battery cells 91, thereby improving safety and reliability.
In this embodiment, as shown in fig. 9, the first electrode 911 is a negative electrode and the second electrode 912 is a positive electrode, but in other embodiments, the first electrode 911 may be a positive electrode and the second electrode 912 may be a negative electrode.
Optionally, as shown in fig. 9, the second electrode 912 protrudes out of the first electrode 911, the upper cover 41 includes a first annular cylinder 411 and a second annular cylinder 412 connected to a cylinder opening at one end of the first annular cylinder 411, the first annular cylinder 411 is sleeved on the periphery of the electric core 91, the first annular cylinder 411 is used for circumferentially limiting the electric core 91, and the second annular cylinder 412 is sleeved on the second electrode 912 to prevent a short circuit from occurring between the first electrode 911 and the second electrode 912 of the same electric core 91, specifically, the first electrode 911 is exposed out of the cylinder opening of the first annular cylinder 411, and the second electrode 912 is exposed out of the cylinder opening of the second annular cylinder 412. Through setting up first annular section of thick bamboo 411 and second annular section of thick bamboo 412, entangle two electrodes of electric core 91, take place the short circuit when preventing pencil module 7 and electric core 91 electrode connection.
Optionally, the battery cell 91 is a cylindrical battery cell, the inner wall of the first annular cylinder 411 is in a ring shape, and the shape of the inner wall of the first annular cylinder 411 is matched with that of the cylindrical battery cell, so that the connection reliability is improved, and shaking is prevented; when the battery cell 91 is in another shape, the shape of the inner wall of the first annular cylinder 411 is adaptively set according to the shape of the battery cell 91. Likewise, optionally, the second electrode 912 has a cylindrical shape, and the inner wall of the second annular cylinder 412 has a circular ring shape.
Optionally, as shown in fig. 9, a baffle 414 is disposed at an end of the first annular cylinder 411 and is used for limiting the direction of the electric core 91 relative to the lower cover 42, in this embodiment, the electric core 91 is a cylindrical electric core, the baffle 414 is used for axially limiting the electric core 91, the second annular cylinder 412 is connected to the baffle 414 through a connecting plate 413, and the connecting plate 413 and the baffle 414 can abut against a part of the first electrode 911, so that another part of the first electrode 911 is exposed.
Optionally, two adjacent upper covers 41 can be clamped, so that the connection reliability between different battery core assemblies is improved, and the connection reliability of the same battery core assembly 9 is further improved.
Optionally, as shown in fig. 9, a second buckle 415 and a second buckle 416 are provided on the circumference of the first annular cylinder 411, the second buckle 415 of the first upper cover 41 can be buckled with the second buckle 416 of the adjacent upper cover 41, and the second buckle 416 of the first upper cover 41 can be buckled with the second buckle 415 of the adjacent upper cover 41. The adjacent battery cells 91 are detachably connected through the respective upper covers 41, so that the connection reliability between different battery cells 91 is improved, and short circuit is prevented. Specifically, the second catch 415 protrudes radially from the circumferential surface of the first annular cylinder 411, and the second catch 416 is recessed radially from the circumferential surface of the first annular cylinder 411.
Optionally, the second buckle 415 and the second card slot 416 are arranged oppositely, and when the plurality of battery cells 91 are arranged in a row, the second buckle 415 and the second card slot 416 which are arranged oppositely are connected with the upper cover 41 on the left and right adjacent battery cells 91 in the same row respectively, so that the connection reliability of the battery cells 91 in the same row is improved.
Optionally, a pair of second catches 415 and second catches 416 may be provided; optionally, two pairs of second buckles 415 and second clamping grooves 416 may also be provided, and the second buckles 415 and the second clamping grooves 416 are oppositely arranged, so that two adjacent battery cells 91 in the same row are connected through the upper cover 41, and two adjacent battery cells 91 in the same column can be connected through the upper cover 41, thereby improving the connection reliability between multiple rows and multiple columns of battery cells 91. Optionally, more than three pairs of second latches 415 and second card slots 416 may be provided. In this embodiment, as shown in fig. 9, the cross-sectional shape of the outer periphery of the upper cover 41 is hexagonal, three pairs of second buckles 415 and second clamping grooves 416 are arranged on the outer periphery to be clamped with the adjacent upper cover 41, and six side surfaces of the upper cover 41 are connected with the adjacent upper cover 41, so that the installation density is improved.
Optionally, be equipped with first buckle 422 on one of lower cover 42 and bottom plate assembly 1 the two, be equipped with first draw-in groove on the other, first buckle 422 and first draw-in groove joint have improved lower cover 42 and bottom plate assembly 1 and have been connected the reliability, and then have improved the connection reliability of electric core 91 in the battery box, and the dismouting of being convenient for is connected through dismantling simultaneously. In this embodiment, as shown in fig. 10 and 11, the first buckle 422 is disposed on the bottom surface of the lower cover 42, the bottom plate assembly 1 is provided with a first clamping groove, and the first buckle 422 on the lower cover 42 is clamped with the first clamping groove, so as to be conveniently inserted into the bottom plate assembly 1 for installation. Optionally, the bottom plate assembly 1 includes a carrier plate 121, and the lower cover 42 is mounted on the carrier plate 121. Specifically, the bottom of the limiting groove 421 has an open space, and the battery cell 91 can be communicated with the first pressure relief cavity 1A; specifically, the bearing plate 121 is a honeycomb plate, and the first engaging groove is annularly disposed on the periphery of the first through hole 1211.
Optionally, the inner wall of the limiting groove 421 is provided with a first glue storage groove 423; after the first glue storage groove 423 is filled with structural glue, the battery cell 91 is bonded in the limiting groove 421, so that the battery cell 91 and the lower cover 42 are more firmly mounted. Further alternatively, as shown in fig. 11, the first glue storage groove 423 is opened on the bottom wall of the limiting groove 421. In the same way, optionally, one side of the lower cover 42 away from the electric core 91 is provided with a second glue storage groove 424, and the lower cover 42 and the bottom plate assembly 1 can be bonded when the second glue storage groove 424 is filled with structural glue, so that the lower cover 42 and the bottom plate assembly 1 are more firmly mounted. In this embodiment, as shown in fig. 10, the second glue storage tank 424 is disposed on the bottom surface of the lower cover 42. In this embodiment, the lower cover 42 is provided with a second glue storage groove 424, and the structural glue is driven into the second glue storage groove to adhere the lower cover 42 to the bearing plate 121, so that the lower cover 42 and the bearing plate 121 are more firmly fixed. In other embodiments, the bearing plate 121 may have a receiving groove, the lower cover 42 is disposed in the receiving groove, the receiving groove can limit the lower cover 42 and the battery cell 91 on the lower cover 42, and the first engaging groove and the first engaging buckle are adaptively disposed, which is not limited.
Alternatively, as shown in fig. 10, the lower cover 42 includes a bottom plate 426 and a plurality of side plates 427 annularly connected to the periphery of the bottom plate 426, the plurality of side plates 427 are arranged at intervals, and the bottom plate 426 and the plurality of side plates 427 enclose a limiting groove 421, so that the weight of the lower cover 42 is reduced. Further alternatively, the outer peripheral surface of the side plate 427 is provided with a limiting protrusion 425, and the sides of the limiting protrusions 425 of two adjacent lower covers 42 are mutually raised and can be used for circumferential limiting.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (18)

1. A battery pack, comprising:
a floor assembly (1);
the edge beam assembly (2) is arranged on the periphery of the bottom plate assembly (1), the edge beam assembly (2) and the bottom plate assembly (1) are enclosed to form an accommodating cavity, and the accommodating cavity comprises one or more than two mounting areas;
the battery pack comprises a plurality of battery pack groups (9), each mounting area is provided with the battery pack group (9), each battery pack group (9) comprises a plurality of battery cells (91), and the battery cells (91) are fixedly arranged on the bottom plate component (1).
2. The battery pack of claim 1, further comprising a frame assembly (10) disposed within the receiving cavity to divide the receiving cavity into the mounting areas.
3. The battery pack according to claim 2, wherein the frame assembly (10) includes one or more first beams (101), and when the first beams (101) are plural, the plural first beams (101) are arranged in parallel at intervals to divide the accommodation chamber into plural mounting regions.
4. A battery pack, as in claim 3, characterized in that said frame assembly (10) further comprises longitudinal beams (102), said longitudinal beams (102) and said first transverse beam (101) forming a cross beam, said cross beam dividing said housing chamber into a plurality of said mounting areas.
5. The battery pack according to claim 2, further comprising an electrical component, wherein the frame assembly (10) further comprises a second beam (103), the second beam (103) dividing the housing chamber into a first region (M) and a second region (N), wherein the plurality of mounting regions are provided in the first region (M), and wherein the electrical component is provided in the second region (N).
6. The battery pack according to claim 1, further comprising a harness module (7) disposed on a side of the electric core pack (9) facing away from the base plate assembly (1), wherein the harness module (7) is electrically connected to the electric core pack (9).
7. The battery pack according to claim 6, further comprising a liquid cooling plate (6), wherein the liquid cooling plate (6) is adhered to the side of the wire harness module (7) facing away from the electric core group (9).
8. The battery pack according to any one of claims 1 to 7, wherein when the housing chamber is divided into a first region (M) and a second region (N), the first region (M) including a plurality of the mounting regions, the second region (N) is provided with a support plate (3);
the bottom plate assembly (1) comprises an outer plate (11) and an inner plate (12), the outer plate (11) and the inner plate (12) form a first pressure relief cavity (1A), and the battery cells (91) in the battery cell group (9) are blocked at one side of the first pressure relief cavity (1A);
the supporting plate (3) and the inner plate (12) form a second pressure relief cavity (3A), and the other side of the first pressure relief cavity (1A) is communicated with the second pressure relief cavity (3A);
the inner chamber of boundary beam subassembly (2) forms third pressure release chamber (2A), second pressure release chamber (3A) with third pressure release chamber (2A) intercommunication, install on boundary beam subassembly (2) with relief valve (100) of third pressure release chamber (2A) intercommunication.
9. The battery pack according to claim 8, wherein the inner plate (12) comprises a carrier plate (121) and a partition plate, the battery cell (91) is sealed at one side of the first through hole (1211) of the carrier plate (121), the partition plate and the support plate (3) form the second pressure relief cavity (3A), and the first pressure relief cavity (1A) and the second pressure relief cavity (3A) are communicated through the second through hole of the partition plate.
10. The battery pack according to claim 9, wherein the second through-holes of the partition plates are provided with a screen plate.
11. The battery pack according to claim 8, wherein a partition wall (21) is provided in the third pressure release chamber (2A) so that the third pressure release chamber (2A) includes a plurality of chambers communicating with each other.
12. The battery pack according to any one of claims 1 to 7, further comprising a mounting assembly (4), wherein each of the battery cells (91) is mounted to the bottom plate assembly (1) through the mounting assembly (4).
13. The battery pack according to claim 12, wherein the mounting base assembly (4) comprises a lower cover (42), the lower cover (42) has a limiting groove (421) for accommodating the battery core (91), a connecting part is arranged on a side of the lower cover (42) facing away from the battery core (91), and the lower cover (42) can be fixed to the bottom plate assembly (1) through the connecting part.
14. The battery pack according to claim 13,
the lower cover (42) comprises a first gluing groove, the first gluing groove is used for containing structural glue, and the battery cell (91) is bonded to the lower cover (42) through the structural glue; and/or
The lower cover (42) comprises a second gluing groove, the second gluing groove is used for containing structural glue, and the lower cover (42) is bonded to the bottom plate assembly (1) through the structural glue.
15. The battery pack according to claim 13, wherein the base plate assembly (1) includes a carrier plate (121), and the lower cover (42) is mounted on the carrier plate (121).
16. The battery pack according to claim 13, further comprising a harness module (7), wherein the first electrode (911) and the second electrode (912) of the battery core (91) are located on the same side, the mount assembly (4) further comprises an upper cover (41) disposed opposite to the lower cover (42), the upper cover (41) covers the side of the battery core (91) where the first electrode (911) and the second electrode (912) are disposed, the first electrode (911) and the second electrode (912) are exposed from the upper cover (41), and the exposed first electrode (911) and the exposed second electrode (912) are connected to the harness module (7).
17. A battery pack according to claim 16, wherein two adjacent upper covers (41) are snap-fittable.
18. A vehicle comprising the battery pack according to any one of claims 1 to 17.
CN202210420095.7A 2022-04-20 2022-04-20 Battery package and vehicle Pending CN114865193A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202210420095.7A CN114865193A (en) 2022-04-20 2022-04-20 Battery package and vehicle
EP22817513.9A EP4276990A1 (en) 2022-04-20 2022-10-20 Battery pack and vehicle
US18/002,816 US20240120592A1 (en) 2022-04-20 2022-10-20 Battery pack and vehicle
PCT/CN2022/126338 WO2023173739A1 (en) 2022-04-20 2022-10-20 Battery pack and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210420095.7A CN114865193A (en) 2022-04-20 2022-04-20 Battery package and vehicle

Publications (1)

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CN202210420095.7A Pending CN114865193A (en) 2022-04-20 2022-04-20 Battery package and vehicle

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115360471A (en) * 2022-10-24 2022-11-18 惠州亿纬锂能股份有限公司 Battery assembly
WO2023173739A1 (en) * 2022-04-20 2023-09-21 湖北亿纬动力有限公司 Battery pack and vehicle
WO2024040422A1 (en) * 2022-08-23 2024-02-29 宁德时代新能源科技股份有限公司 Battery box, battery, and electrical device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023173739A1 (en) * 2022-04-20 2023-09-21 湖北亿纬动力有限公司 Battery pack and vehicle
WO2024040422A1 (en) * 2022-08-23 2024-02-29 宁德时代新能源科技股份有限公司 Battery box, battery, and electrical device
CN115360471A (en) * 2022-10-24 2022-11-18 惠州亿纬锂能股份有限公司 Battery assembly
EP4362186A1 (en) * 2022-10-24 2024-05-01 Eve Energy Co. Ltd. Battery assemblies

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