WO2018157557A1 - Module de batterie - Google Patents

Module de batterie Download PDF

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Publication number
WO2018157557A1
WO2018157557A1 PCT/CN2017/097055 CN2017097055W WO2018157557A1 WO 2018157557 A1 WO2018157557 A1 WO 2018157557A1 CN 2017097055 W CN2017097055 W CN 2017097055W WO 2018157557 A1 WO2018157557 A1 WO 2018157557A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
battery module
top cover
module according
voltage sampling
Prior art date
Application number
PCT/CN2017/097055
Other languages
English (en)
Chinese (zh)
Inventor
秦峰
游志毅
朱涛声
马林
肖信福
王娟
张捷
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2018157557A1 publication Critical patent/WO2018157557A1/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
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery 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
    • H01M50/20—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
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/276—Inorganic material
    • 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
    • H01M50/291—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 characterised by their shape
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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 utility model belongs to the field of batteries, and more particularly, the utility model relates to a battery module.
  • the soft pack battery is a high-performance battery that can be charged and discharged at a large rate and has a long service life. Therefore, it is widely used in various fields such as new energy vehicles, electric vehicles, and electric tools.
  • Existing soft-packed batteries use aluminum-plastic film to package bare cells, and there are some defects: for example, the insulation withstand voltage cannot meet the demand, and the secondary package on the side of the output ear and the degassed secondary package are not tightly sealed. The problem is easy to cause the battery to leak, which seriously affects the safety of the battery.
  • the grouping and fixing of batteries is the key point and difficulty in the development of battery modules.
  • the current common practice is to use a bracket with a special structure to fix the position of the battery core and then make electrical connections between the batteries.
  • the disadvantage of the method is that the structure of the bracket is complicated, the precision is high, the assembly process is complicated, and the production cost is increased.
  • the packaged aluminum plastic film will rub against the bracket, which will easily cause the aluminum plastic film to rupture, thereby causing damage to the battery.
  • the side of the aluminum-plastic film package is not allowed to bend at the edge of the ear, which causes a large space waste, which reduces the energy density of the battery and limits the softness. Pack battery application.
  • the purpose of the utility model is to overcome the deficiencies of the prior art and provide a battery module with high safety performance and high energy density to replace the existing square-shell electric core module and soft-package battery core module structure to overcome the problem.
  • the core energy density of the shell is low and the safety performance of the soft pack is insufficient.
  • the present invention provides a battery module, including:
  • the battery pack is housed in a battery case, the battery pack includes a plurality of single cells, and the single cells are provided with a tab and an output pole electrically connected to the tab;
  • a top cover that is sealingly connected to the battery case
  • a gap between the battery pack and the battery case is filled with potting glue.
  • the unit cell includes an encapsulating film that seals the tabs of the unit cell and forms an edge seal.
  • the encapsulation film is a plastic film or an electrolyte-resistant insulating material film.
  • the encapsulating film forms a bent edge seal after sealing the tab.
  • the top cover is provided with an explosion-proof valve and a voltage sampling terminal through hole.
  • the voltage sampling terminal through hole corresponds to a voltage sampling terminal disposed on the connecting piece, and when the top cover is sealedly connected with the battery case, the voltage sampling terminal is sealed and installed at the voltage sampling terminal through The voltage sampling terminal through hole is at least partially extended in the hole.
  • the battery case and the top cover are made of a metal material, and the battery case and the top cover are connected by welding.
  • the battery case and the top cover are made of aluminum.
  • the battery module further includes:
  • Insulation pad located between adjacent cells
  • Adapter piece made of conductive material, as the total positive or total negative output in multiple cells
  • the pole is electrically connected to the pole provided on the top cover;
  • each connecting piece is electrically connected to an output of the corresponding single cell, so that the plurality of single cells are connected in series and/or in parallel.
  • the adapter piece is two, respectively located at the top of two single cells at both ends of the battery pack, one end is electrically connected to the tab on the single cell, and the other end is fixed. On the insulation mat.
  • the battery module of the present invention encapsulates the battery core through a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed in the battery case by using a potting glue, which has the following advantages:
  • the sealing edge of the battery tab can be bent to save space and increase the energy density of the battery module.
  • FIG. 1 is an exploded perspective view of a battery module of the present invention.
  • FIG. 2 is a schematic structural view of a single battery in the battery module of the present invention.
  • FIG. 3 is a partial assembly view of the battery module of the present invention.
  • FIG. 4 is a partial assembly view of the battery module of the present invention.
  • FIG. 5 is a schematic view showing the assembly of the battery module of the present invention.
  • the battery module of the present invention includes:
  • the battery pack 10 is housed in a battery case 20, and the battery pack 10 includes a plurality of unit cells 12, and the unit cells 12 are provided with tabs (not shown) and an output pole 120 electrically connected to the tabs;
  • the top cover 30 is sealingly connected to the battery case 20;
  • the gap between the battery pack 10 and the battery case 20 is filled with potting glue.
  • the battery case 20 is a hollow structure having an opening made of a metal material.
  • the battery case 20 is an aluminum case, and the aluminum case has an ideal denseness, which can prevent external moisture from entering the case and prevent moisture from affecting the performance of the battery module.
  • the battery pack 10 includes a plurality of battery cells 12 arranged in an adjacent manner, and the battery cells 12 are connected by a connecting piece 142.
  • the arrangement of the battery pack 10 is not particularly limited, and may be a battery pack arranged in series or a battery pack arranged in parallel.
  • the connecting piece 142 is made of a conductive material.
  • the connecting piece 142 is respectively provided with a bent portion on both sides according to the structure and shape of the unit cell 12, and the bent portions on both sides and the output poles on the adjacent two single cells 12 respectively.
  • 120 is electrically connected to enable a plurality of unit cells 12 to be connected in series and/or in parallel.
  • a voltage sampling terminal 144 is disposed on the connecting piece 142 and is fixed on the heat insulating pad 14 between the adjacent two unit cells 12.
  • the edge of the heat insulating pad 14 extends to the edge of the unit cell 12, and the heat transfer between the unit cells 12 can be blocked.
  • the arrangement can prevent the cells 12 from affecting each other due to heat, so that the battery module The heat in it is not easy to exceed the limit.
  • Each of the unit cells 12 includes two electrode electrodes 120 of opposite polarity, and the output electrode 120 is located at the top of the unit cell 12, and is made of a conductive material, respectively, with tabs (not shown) on the unit cell 12 and The connecting piece 142 is electrically connected.
  • the battery module further includes two adapter pieces 140, the adapter piece The 140 is made of a conductive material, and two adapter sheets 140 are respectively located at the top of the two unit cells 12 at both ends of the battery pack 10.
  • One end of the adapter piece 140 is electrically connected to a tab (not shown) on the unit cell 12.
  • the other end is fixed to the heat insulating pad 14 to prevent the transfer piece 140 from moving.
  • the adapter piece 140 is mainly electrically connected to the poles 360 on the top cover 30 as the total positive output or the total negative output of the plurality of unit cells 12 to connect the poles 360 and the unit cells 12 corresponding to the top cover 30.
  • the corresponding tabs are electrically connected.
  • each of the unit cells 12 is sealed with an encapsulation film 124 for accommodating the electrolyte and the bare cells (not shown) of the package unit cells 12, and sealing the monomers.
  • the encapsulation film 124 is a plastic film or an electrolyte-resistant insulating material film.
  • the encapsulation film 124 is packaged by a process similar to a soft package to form a battery structure.
  • the battery is encapsulated by a plastic film or an electrolyte-resistant insulating material film.
  • the thickness of the battery core can be much larger than that of a conventional soft-packed battery cell, and the battery capacity can be improved.
  • the plastic film or the electrolyte-resistant insulating material used in the battery core package is blown by a process such as blow molding, and a sealing film of a specific size and shape is blown with the shape of the battery core, and then packaged and formed by a soft-packing edge-sealing process.
  • the invention solves the problem that the traditional soft-package battery core is not tightly sealed and the insulation withstand voltage cannot meet the requirements.
  • the sealing edge 122 formed after sealing can be bent, and due to the excellent properties of the plastic film, even if the sealing edge 122 formed after sealing is bent, the battery core can be completely sealed. It will not cause the battery to leak, and it can also save space and increase the energy density of the battery module.
  • the top cover 30 is made of a metal material.
  • the top cover 30 is made of aluminum, and the top cover 30 is provided with an explosion-proof valve 32 and a voltage sampling terminal through hole 34.
  • the explosion-proof valve 32 is located in the middle of the top cover 30.
  • the explosion-proof valve 32 on the top cover 30 is first broken, and the pressure relief function is achieved through the explosion-proof valve 32, thereby improving The safety performance of the battery module.
  • the voltage sampling terminal through hole 34 is corresponding to the voltage sampling terminal 144 on the connecting piece 142, and the voltage is The sampling terminal 144 extends through the voltage sampling terminal through hole 34 and at least partially extends out of the voltage sampling terminal through hole 34 as a port for voltage sampling, and is sealed and fixed by an insulating rubber ring and a nut.
  • the gap between the battery pack 10 and the battery case 20 is filled with a potting compound having a suitable thermal conductivity and not reacting with the electrolyte, and the potting compound will be housed in the battery case 20
  • the internal battery pack 10 and all components are fixed as a whole, which can significantly improve the anti-vibration performance of the module. Even if the battery module vibrates during use, it will not cause the electrical connection of the component to be broken and affect the battery module. normal operation.
  • the unit cells 12 in the battery pack 10 can be fixed in a fixed position, and not only the unit cells 12 can be prevented from shaking in the battery case 20, but also the unit cells 12 and the battery case 20 can be prevented.
  • the friction between them causes destruction of the unit cell 12.
  • the sealing edge 122 of the sealing film 124 of the unit cell 12 can be further sealed and filled, and even if the sealing edge 122 is not tightly sealed during the bending process, the sealing can be performed by potting.
  • the glue seals the edge seal 122 to prevent electrolyte leakage of the unit cell 12.
  • the potting compound can fill the gaps in the module, so that the heat transfer between the single cells 12 is more uniform, and can also function as heat conduction and heat dissipation, and the temperature is balanced; since the filled potting glue has the characteristics of fire retarding and flame retardancy. Even if the individual cells 12 are damaged or ignited during use, the normal operation of the other cells 12 in the module will not be affected. Filling with potting glue can also improve the insulation performance between the internal components, improve the waterproof and moisture-proof performance of the battery module, and reduce the damage of the battery module due to the rust and rust caused by long-term use.
  • a plurality of unit cells 12 are arranged side by side to form a battery pack 10, and the battery pack 10 is housed in the battery case 20, and two unit cells 12 at both ends of the battery pack 10 are provided.
  • Two adapter plates 140 as total positive output or total negative output are mounted on the top, and the adapter piece 140 is soldered to the poles 360 on the cover plate 30 for electrical connection;
  • a potting glue having a high thermal conductivity and not reacting with the electrolyte is injected into the battery case 20, and the gap inside the battery case 20 is completely filled by the potting glue, and the battery pack 10, the adapter piece 140, and the connecting piece are inserted. 142.
  • the heat insulating pad 14 and the sealing edge 122 are all sealed and fixed in the battery case 20, so that the battery module becomes a whole;
  • the top cover 30 is soldered to the battery case 20, so that the entire battery module is in a sealed state, wherein the voltage sampling terminal through hole 34 on the top cover 30 is sealingly and fixedly connected with the voltage sampling terminal 144, and the voltage sampling terminal 144 is used as a The port for external voltage sampling extends outside the top cover 30.
  • the poles 360 on the top cover 30 are sealed and fixedly connected by the pole-studded aluminum block 361, and finally the entire battery module is sealed and fixed to obtain the required battery module with high protection level.
  • the battery module of the present invention is sealed with a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed to the battery case by using a potting glue.
  • a plastic film or an electrolyte-resistant insulating material film In combination with the above detailed description of the embodiments of the present invention, the battery module of the present invention is sealed with a plastic film or an electrolyte-resistant insulating material film, and the battery pack is sealed and fixed to the battery case by using a potting glue. In vivo, has the following advantages:
  • the sealing edge of the battery tab can be bent to save space and increase the energy density of the battery module.

Landscapes

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

Abstract

La présente invention concerne un module de batterie, comprenant : un boîtier de batterie (20) ; un bloc-batterie (10) installé dans le boîtier de batterie (20), le bloc-batterie (10) comprenant une pluralité de cellules de batterie (12), et les cellules de batterie (12) étant pourvues de languettes et d'électrodes de sortie (120) électriquement connectées aux languettes ; et un couvercle supérieur (30) relié de manière étanche au boîtier de batterie (20), un espace entre le bloc-batterie (10) et le boîtier de batterie (20) étant rempli d'un agent d'étanchéité verseur. Selon le module de batterie, par le remplissage de l'espace entre le bloc-batterie (10) et le boîtier de batterie (20) d'un agent d'étanchéité verseur, la sécurité et la densité d'énergie du module de batterie peuvent être considérablement améliorées.
PCT/CN2017/097055 2017-02-28 2017-08-11 Module de batterie WO2018157557A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201720184914.7U CN206490119U (zh) 2017-02-28 2017-02-28 电池模组
CN201720184914.7 2017-02-28

Publications (1)

Publication Number Publication Date
WO2018157557A1 true WO2018157557A1 (fr) 2018-09-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/097055 WO2018157557A1 (fr) 2017-02-28 2017-08-11 Module de batterie

Country Status (2)

Country Link
CN (1) CN206490119U (fr)
WO (1) WO2018157557A1 (fr)

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CN109273653A (zh) * 2018-10-22 2019-01-25 中兴高能技术有限责任公司 一种电池模组用汇流排
CN109713373A (zh) * 2018-12-29 2019-05-03 东莞市金源电池科技有限公司 一种防止软包锂电芯二封边上角位破损的专用设备及制作工艺
CN110581308A (zh) * 2019-09-27 2019-12-17 福建飞毛腿动力科技有限公司 半灌胶防水电池的结构和实现方法
CN110911626A (zh) * 2018-09-14 2020-03-24 宁德时代新能源科技股份有限公司 电池模组及电池包
CN111952525A (zh) * 2020-08-20 2020-11-17 华霆（合肥）动力技术有限公司 同侧集流装置、电池模组和电动车
CN113328159A (zh) * 2020-02-12 2021-08-31 比亚迪股份有限公司 电池、电池模组、电池包及电动车
CN114412326A (zh) * 2022-01-20 2022-04-29 优曼蓝盾(北京)门业有限公司 一种防火门及其制备方法
US20220200092A1 (en) * 2020-06-18 2022-06-23 Dongguan Poweramp Technology Limited Battery pack and electric vehicle
CN114824668A (zh) * 2022-03-31 2022-07-29 东风汽车集团股份有限公司 一种串并联切换装置、电池包和车辆
CN116097517A (zh) * 2021-07-30 2023-05-09 宁德时代新能源科技股份有限公司 电池、用电设备和电池的制备方法
WO2024103931A1 (fr) * 2022-11-15 2024-05-23 珠海冠宇电池股份有限公司 Batterie et dispositif électronique

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CN207425958U (zh) * 2017-09-30 2018-05-29 宁德时代新能源科技股份有限公司 电池模组
WO2019183937A1 (fr) * 2018-03-30 2019-10-03 深圳市大疆创新科技有限公司 Ensemble batterie et véhicule aérien sans pilote le comprenant
CN110391368A (zh) * 2018-04-20 2019-10-29 宁德时代新能源科技股份有限公司 二次电池、其装配方法和电池模组
CN110492033A (zh) * 2019-08-17 2019-11-22 蔡广益 一种真空电池装置
CN112542644B (zh) * 2019-09-19 2022-10-14 东莞新能源科技有限公司 电池包
WO2021253334A1 (fr) * 2020-06-18 2021-12-23 东莞新能安科技有限公司 Bloc-batterie possédant une structure de décompression
CN114361738A (zh) * 2020-09-29 2022-04-15 宁德新能源科技有限公司 一种电化学装置及包含该电化学装置的电子装置
CN114552098B (zh) * 2020-11-24 2024-05-07 比亚迪股份有限公司 电池壳及其制备方法
JP7371659B2 (ja) * 2021-03-31 2023-10-31 トヨタ自動車株式会社 蓄電装置

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CN201084764Y (zh) * 2007-07-30 2008-07-09 比亚迪股份有限公司 一种软包装电池
CN101383428A (zh) * 2008-10-21 2009-03-11 天津力神电池股份有限公司 单电极锂离子电池的制作方法
CN205609583U (zh) * 2016-04-22 2016-09-28 宁德时代新能源科技股份有限公司 电池模组
CN105810867A (zh) * 2016-05-10 2016-07-27 国防科学技术大学 固态聚合物锂电池组及其制备方法
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110911626A (zh) * 2018-09-14 2020-03-24 宁德时代新能源科技股份有限公司 电池模组及电池包
CN109273653A (zh) * 2018-10-22 2019-01-25 中兴高能技术有限责任公司 一种电池模组用汇流排
CN109713373A (zh) * 2018-12-29 2019-05-03 东莞市金源电池科技有限公司 一种防止软包锂电芯二封边上角位破损的专用设备及制作工艺
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