WO2024036750A1 - Module de batterie et batterie d'alimentation - Google Patents

Module de batterie et batterie d'alimentation Download PDF

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Publication number
WO2024036750A1
WO2024036750A1 PCT/CN2022/127543 CN2022127543W WO2024036750A1 WO 2024036750 A1 WO2024036750 A1 WO 2024036750A1 CN 2022127543 W CN2022127543 W CN 2022127543W WO 2024036750 A1 WO2024036750 A1 WO 2024036750A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
battery module
top cover
tray
module according
Prior art date
Application number
PCT/CN2022/127543
Other languages
English (en)
Chinese (zh)
Inventor
欧阳效群
李凡
陈朝海
陈智伟
Original Assignee
湖北亿纬动力有限公司
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 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Publication of WO2024036750A1 publication Critical patent/WO2024036750A1/fr

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • 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
    • 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
    • H01M50/242—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 against vibrations, collision impact or swelling
    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • 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
    • H01M50/271—Lids or covers for the racks or secondary 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
    • H01M50/289—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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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

  • This application relates to the field of battery technology, for example, to a battery module and a power battery.
  • Battery modules usually include components such as battery packs, trays, and battery module collection integration components (Cell Contacting System, CCS components). Among them, the battery pack is fixed on the tray through foam glue. If the cells in the battery pack experience thermal runaway, the foam rubber will easily carbonize in a high-temperature environment, and the viscosity of the foam rubber will weaken. At the same time, The high-temperature and high-pressure gas inside the battery core spurts out from the pressure relief valve of the battery core, causing the battery core to break away from the foam rubber and spurt upward, causing heat diffusion problems; in addition, CCS components usually include copper bars and brackets to fix the copper bars. During the transportation and use of battery modules, vibration often occurs.
  • CCS components Cell Contacting System
  • This application provides a battery module that can reduce the probability of heat diffusion and avoid internal stress in CCS components.
  • this application provides a
  • Battery module including:
  • the pallet is provided with a first receiving slot
  • the top cover is buckled and connected to the tray, and the top cover and the first containing groove form a containing cavity;
  • the battery core group is arranged in the accommodation cavity
  • the CCS component includes a connecting row and a bracket.
  • the connecting row is installed on the bracket.
  • the connecting row and bracket are located between the battery pack and the top cover;
  • Top structural glue The gaps between the connecting rows, brackets and top covers are filled with top structural glue.
  • the battery module further includes a bottom structural adhesive, and the battery pack is fixed to the bottom of the first receiving tank through the bottom structural adhesive.
  • the battery module further includes a liquid cooling plate.
  • the liquid cooling plate is disposed in the receiving cavity and is used to absorb heat generated by the battery pack.
  • the top cover is provided with a second accommodation groove, and the second accommodation groove cooperates with the first accommodation groove to form an accommodation cavity.
  • the tray and the top cover are connected through a connector.
  • the number of connecting members is multiple, and the multiple connecting members are evenly distributed along the circumferential direction of the pallet.
  • the connecting member includes a bolt and a nut, and the bolt is threadedly engaged with the nut.
  • the bottom of the first receiving groove is provided with protruding ribs.
  • the number of protruding ribs is multiple, and the plurality of protruding ribs are evenly distributed on the bottom of the first receiving groove.
  • the present application provides a power battery.
  • the power battery includes a battery box and the above-mentioned battery module.
  • the battery module is installed in the battery box.
  • the top cover and the tray are buckled and connected, so that the top cover and the first accommodation groove form an accommodation cavity, and the battery core group is arranged in the accommodation cavity.
  • the top cover blocks the upward spraying of the battery core, thereby reducing the probability of heat diffusion; in addition, the gaps between the connecting row, the bracket and the top cover are all passed through the top Structural glue filling, that is, the top structural glue is used to realize the bonding and fixing between the connecting rows and the bonding and fixing between the CCS component and the top cover, which avoids the relative motion of the connecting row relative to the bracket when the battery module vibrates.
  • the top structural adhesive also improves the structural strength of the top cover.
  • the top cover blocks the upward movement of the battery cells, When spraying, it can avoid the problem of deformation of the top cover, which plays a very good role in maintaining the structural consistency of the battery module.
  • the power battery provided by this application uses the above-mentioned battery module.
  • the top cover of the battery module can block the battery core, thereby reducing the probability of thermal diffusion of the power battery, effectively improving the efficiency of the power battery.
  • Safety in addition, when the power battery vibrates, the internal stress of the CCS component is small, so it plays a good role in ensuring the connection stability and reliability of the connecting row and bracket, effectively improving the stability of the power battery operation. .
  • Figure 1 is a schematic diagram of the exploded structure of the battery module provided by this application.
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral body; it can be It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components.
  • connection can be a fixed connection, a detachable connection, or an integral body; it can be It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components.
  • a first feature to a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact. contact but through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • This embodiment provides a battery module that can reduce the probability of heat diffusion and avoid the problem of internal stress in CCS components.
  • the battery module includes a tray 100, a top cover 200, a battery pack 300, a CCS component 400 and a top structural glue 500.
  • the tray 100 is provided with a first receiving slot 110, and the top cover 200 and The tray 100 is snap-fitted, and the top cover 200 and the first receiving slot 110 form a receiving cavity, and the battery pack 300 is arranged in the receiving cavity.
  • the CCS assembly 400 includes a connecting row 410 and a bracket 420, and the connecting row 410 is installed on the bracket 420.
  • the connection row 410 and the bracket 420 are located between the battery pack 300 and the top cover 200 .
  • the gaps between the connection row 410 , the bracket 420 and the top cover 200 are filled with the top structural glue 500 .
  • the top cover 200 is snap-fitted to the tray 100 so that the top cover 200 and the first receiving slot 110 form a receiving cavity, and the battery pack 300 is placed in the receiving cavity.
  • the top cover 200 blocks the upward ejection of the battery core, thereby reducing the probability of heat diffusion.
  • the gaps between the connecting row 410, the bracket 420 and the top cover 200 are all filled with the top structural glue 500, that is, the top structural glue 500 is used to realize the bonding and fixation between the connecting row 410 and the bracket 420, and the CCS component 400 and the top cover.
  • the adhesive fixation between 200 avoids the problem of relative movement of the connection row 410 relative to the bracket 420 when the battery module vibrates, thereby avoiding the problem of internal stress in the CCS component 400 and improving the connection between the connection row 410 and the bracket 420 Connection stability and reliability.
  • the top structural adhesive 500 also improves the structural strength of the top cover 200. When the top cover 200 blocks the upward ejection of the battery cells, it can avoid the problem of deformation of the top cover 200, which plays a good role in maintaining the structural consistency of the battery module. effect. Since the structural adhesive also has good sealing properties, filling the gaps between the connecting row 410, the bracket 420 and the top cover 200 with the top structural adhesive 500 also achieves a sealing effect on the top of the battery module.
  • connection row 410 is made of copper material. Copper material has good conductive properties and is cheap. Of course, in other embodiments, the connection row 410 can also be made of aluminum material or other materials with better properties. Made of conductive material.
  • the battery module also includes a bottom structural adhesive 600 .
  • the battery pack 300 is fixed to the bottom of the first accommodation slot 110 through the bottom structural adhesive 600 to prevent the battery module from shaking or colliding.
  • the problem of shaking or relative movement occurs, which improves the stability of the battery pack 300 being fixed in the accommodation cavity.
  • the bottom structural adhesive 600 is used Fixing the battery pack 300 at the bottom of the first receiving slot 110 also achieves a sealing effect at the bottom of the battery module, so that the battery module as a whole has better sealing performance.
  • the tray 100 and the top cover 200 are connected through connectors, and the connectors are threaded bolts and nuts.
  • the threaded connection method of bolts and nuts is relatively simple and has high connection reliability.
  • the connecting piece can also be a buckle or other connecting piece.
  • the number of connectors is multiple, and the multiple connectors are evenly distributed along the circumferential direction of the tray 100, which not only improves the reliability of the connection between the tray 100 and the top cover 200, but also improves the uniformity of the connection between the two. .
  • the battery module also includes a liquid cooling plate 700.
  • the liquid cooling plate 700 is disposed in the accommodation cavity.
  • the liquid cooling plate 700 is used to absorb the heat emitted by the battery core group 300 to achieve the purpose of maintaining the battery core.
  • the cooling effect of the battery pack 300 reduces the probability of thermal runaway of the cells in the battery pack 300 and improves the safety of the battery module.
  • the top cover 200 is provided with a second accommodating groove, and the second accommodating groove cooperates with the first accommodating groove 110 to form an accommodating cavity, so as to expand the volume of the accommodating cavity and increase the volume of the battery pack 300 disposed in the accommodating cavity, thereby To achieve the effect of improving battery energy density.
  • the bottom of the first receiving groove 110 is provided with protruding ribs 111 to improve the structural strength of the bottom of the tray 100 , thereby improving the load-bearing capacity of the tray 100 and the overall structural strength of the battery module.
  • the shape of the protruding rib 111 is generally cylindrical, annular or irregular. The specific shape of the protruding rib 111 may be determined according to the actual situation.
  • the number of protruding ribs 111 is multiple, and the plurality of protruding ribs 111 are evenly distributed at the bottom of the first receiving groove 110 , which on the one hand improves the structural strength of the bottom of the tray 100 and on the other hand On the one hand, the uniformity of the structural strength of the bottom of the tray 100 is improved, thereby making the overall load-bearing capacity of the tray 100 more uniform, and the overall structural strength of the battery module more uniform.
  • the bottom of the battery pack 300 and the bottom of the first receiving tank 110 are fixed by the bottom structural glue 600
  • the CCS component 400 and the top cover 200 are fixed by the top structural glue 500
  • the CCS The connection row 410 of the component 400 and the bracket 420 are also fixed by the top structural glue 500.
  • the battery pack 300 can be well fixed at the bottom of the first accommodation tank 110, and CCS
  • the internal stress of the component 400 is also small; the top structural glue 500 and the bottom structural glue 600 realize the sealing of the battery module, eliminating the remaining sealing structure of the battery module; the battery module eliminates the need for foaming in related technologies glue, effectively reducing the production cost of the battery module; if the cells in the battery pack 300 undergo thermal runaway, the top cover 200 can prevent the cells from ejecting upward, thus reducing the probability of heat diffusion and improving the efficiency of the battery module. security.
  • This embodiment also provides a power battery, which has high safety and operational stability.
  • the power battery includes a battery box and the above-mentioned battery module.
  • the battery module is installed in the battery box.
  • the top cover 200 of the battery module can block the battery core, thereby causing the power battery to fail.
  • the probability of heat diffusion is low, which effectively improves the safety of the power battery; in addition, when the power battery vibrates, the internal stress of the CCS component 400 is small, which affects the connection stability and reliability of the connection row 410 and the bracket 420. It has a very good protective effect and effectively improves the stability of the power battery operation.

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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)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne un module de batterie et une batterie d'alimentation. Le module de batterie comprend un plateau, un couvercle supérieur, un groupe d'éléments de batterie, un ensemble CCS et un adhésif structural supérieur. Le plateau comporte un premier évidement de réception ; le couvercle supérieur est relié par encliquetage au plateau, et le couvercle supérieur et le premier évidement de réception forment une cavité de réception, le groupe d'éléments de batterie étant disposé dans la cavité de réception ; l'ensemble CCS comprend un support et une barre de liaison installée sur le support, la barre de liaison et le support étant tous deux situés entre le groupe d'éléments de batterie et le couvercle supérieur, et des espaces entre la barre de liaison, le support et le couvercle supérieur étant tous remplis au moyen de l'adhésif structural supérieur.
PCT/CN2022/127543 2022-08-17 2022-10-26 Module de batterie et batterie d'alimentation WO2024036750A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202222176383.0 2022-08-17
CN202222176383.0U CN218300097U (zh) 2022-08-17 2022-08-17 电池模组及动力电池

Publications (1)

Publication Number Publication Date
WO2024036750A1 true WO2024036750A1 (fr) 2024-02-22

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PCT/CN2022/127543 WO2024036750A1 (fr) 2022-08-17 2022-10-26 Module de batterie et batterie d'alimentation

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Country Link
CN (1) CN218300097U (fr)
WO (1) WO2024036750A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111653701A (zh) * 2020-04-28 2020-09-11 南京创源动力科技有限公司 一种灌封式动力电池系统
CN111987248A (zh) * 2019-05-21 2020-11-24 比亚迪股份有限公司 动力电池包和车辆
CN214688995U (zh) * 2021-01-07 2021-11-12 比亚迪股份有限公司 电池包及车辆
WO2021253976A1 (fr) * 2020-06-19 2021-12-23 比亚迪股份有限公司 Véhicule et bloc-batterie associé
CN114284594A (zh) * 2020-09-17 2022-04-05 比亚迪股份有限公司 一种电池及电池包
CN114759290A (zh) * 2022-04-26 2022-07-15 湖北亿纬动力有限公司 一种电池模组及电池包

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111987248A (zh) * 2019-05-21 2020-11-24 比亚迪股份有限公司 动力电池包和车辆
CN111653701A (zh) * 2020-04-28 2020-09-11 南京创源动力科技有限公司 一种灌封式动力电池系统
WO2021253976A1 (fr) * 2020-06-19 2021-12-23 比亚迪股份有限公司 Véhicule et bloc-batterie associé
CN114284594A (zh) * 2020-09-17 2022-04-05 比亚迪股份有限公司 一种电池及电池包
CN214688995U (zh) * 2021-01-07 2021-11-12 比亚迪股份有限公司 电池包及车辆
CN114759290A (zh) * 2022-04-26 2022-07-15 湖北亿纬动力有限公司 一种电池模组及电池包

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