WO2019184494A1 - Composant de connexion électrique et module de batterie - Google Patents

Composant de connexion électrique et module de batterie Download PDF

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Publication number
WO2019184494A1
WO2019184494A1 PCT/CN2018/124617 CN2018124617W WO2019184494A1 WO 2019184494 A1 WO2019184494 A1 WO 2019184494A1 CN 2018124617 W CN2018124617 W CN 2018124617W WO 2019184494 A1 WO2019184494 A1 WO 2019184494A1
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WO
WIPO (PCT)
Prior art keywords
electrical connection
convex portion
connection assembly
battery module
convex
Prior art date
Application number
PCT/CN2018/124617
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English (en)
Chinese (zh)
Inventor
邹华斌
黄爱芳
王德荣
周灵刚
包聪
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 WO2019184494A1 publication Critical patent/WO2019184494A1/fr

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    • 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
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technologies, and in particular, to an electrical connection assembly and a battery module.
  • the battery system can be divided into a battery pack, a battery module and a single battery according to the system hierarchy from high to low.
  • Most of the battery modules produced by domestic and foreign lithium battery manufacturers are based on single cells.
  • the smallest unit, that is, the first production of a single battery two or more single cells are assembled into a battery module through a series of parallel connection of aluminum bars and other electrical components, and two or more battery modules are connected in series and in parallel through electrical connection components. The way to form a battery pack.
  • the most basic functional requirement is that electrical energy can be input and output, so the safety and reliability of the electrical connection components in the battery system is particularly important.
  • the electrical connection component on the current market is connected with the module output pole of the battery module or the pole of the single battery, especially the vibration impact force is generated by ultrasonic welding, which causes the electrical connection component to be easily cracked.
  • the solder joint between the electrical connection component and the battery post is prone to occur, and when the single cell is charged and discharged, the electrical connection component cannot overcome the deformation of the single cell, and may also be generated. Cracking problem.
  • the embodiment of the present application provides an electrical connection component and a battery module.
  • the electrical connection component is used for a battery module, can effectively absorb vibration impact force, and can adapt to expansion deformation of a single battery, and is not easy to crack.
  • an electrical connection assembly for a battery module, including at least one conductive sheet, the conductive sheet includes a connection region spaced apart in a first direction and connected to each adjacent two a vibration absorption region between the connection regions; the vibration absorption region includes a plurality of convex portions continuously arranged in the first direction and bent by the conductive sheet, the convex direction of the convex portion intersecting the first direction and adjacent to the two convex portions
  • the protruding portion has a convex direction opposite;
  • the convex portion includes a central convex portion located at a central position of the vibration absorbing region and a side convex portion distributed at two sides of the central convex portion, and the opening width of the central convex portion along the first direction is greater than The width of the opening of the side convex portion in the first direction.
  • a battery module in another aspect, includes a plurality of single cells, a module output pole, and the above-mentioned electrical connection component.
  • the plurality of single cells are connected in series or in parallel through electrical connection components, and the module outputs
  • the pole is electrically connected to the unit cell that is the output or input of the battery module through the electrical connection assembly.
  • the electrical connection assembly includes at least one conductive sheet, and the conductive sheet includes a connection region spaced apart in the first direction and connected between each adjacent two connection regions. Damping area.
  • the connection area can be connected to the poles of the unit cells constituting the battery module, so that the unit cells can be connected in series or in parallel, and the module output pole can be used as a battery module through the connection area.
  • the battery cells at the output or input are electrically connected.
  • the vibration absorption region includes a plurality of convex portions which are continuously disposed in the first direction and are bent by the conductive sheet, and the convex direction of the convex portion intersects with the first direction, and the adjacent two The convex portions have opposite convex directions, and the convex portion includes a central convex portion located at a center position of the vibration absorption region and a side convex portion distributed on both sides of the central convex portion, and the central convex portion is along the first direction
  • the opening width is greater than the opening width of the side protrusions in the first direction, so that the electrical connection assembly can effectively absorb the vibration impact between the electrical connection component and the pole of the unit cell or between the module output poles,
  • the utility model can adapt to the height difference between the single cells, avoid the virtual welding, and can adapt to the expansion deformation of the single battery during charging and discharging, has higher fatigue strength and is not easy to crack.
  • FIG. 1 is a schematic structural view of an electrical connection assembly according to an embodiment of the present application.
  • Figure 2 is a front elevational view of the electrical connector assembly of Figure 1;
  • FIG. 3 is a schematic view showing the connection between the electrical connection component of FIG. 1 and the output pole of the module;
  • Figure 4 is a schematic view showing the connection between the electrical connecting component shown in Figure 1 and a single cell;
  • FIG. 5 is a schematic structural view of an electrical connection assembly according to another embodiment of the present application.
  • FIG. 6 is a schematic structural view of an electrical connection assembly according to still another embodiment of the present application.
  • Figure 7 is a front elevational view of the electrical connector assembly of Figure 6;
  • FIG. 8 is a partial schematic structural view of a battery module according to an embodiment of the present application.
  • FIG. 1 is a schematic structural view of an electrical connection assembly 1 according to an embodiment of the present application
  • FIG. 2 is a front view of the electrical connection assembly 1 shown in FIG.
  • an electrical connection assembly 1 is provided for a battery module, including a conductive sheet 10, and the conductive sheet 10 includes two connection regions 11 spaced apart in a first direction m and connected to two
  • the vibration absorbing region 12 between the connection regions 11 includes three convex portions 121 which are continuously disposed in the first direction m and are bent by the conductive sheets 10 themselves, and each of the convex portions 121 preferably has a cross section.
  • the arc shape, said continuous arrangement means that the three bosses 121 are sequentially connected in the first direction m.
  • the convex direction of the convex portion 121 intersects with the first direction m and the convex directions of the adjacent two convex portions 121 are opposite.
  • the angle a between the protruding direction of the convex portion 121 and the first direction m is preferably 90°, of course, not limited to 90°, and may be other values greater than 0° and less than 90°, convex.
  • the rising portion 121 is a strip-shaped projection formed to extend through the conductive sheet 10 in the width direction n of the conductive sheet 10.
  • FIG. 3 is a schematic diagram showing the connection between the electrical connection component 1 and the module output pole 2 of FIG. 1.
  • FIG. 4 shows the electrical connection component 1 and the single of FIG. A schematic diagram of the connection between the body batteries 3.
  • the electrical connection assembly 1 provided in the embodiment of the present application can be connected to the poles of the unit cells 3 constituting the battery module through the connection region 11 when the battery module is applied to connect the unit cells 3 in series or in parallel. It is also possible to electrically connect the module output pole 2 to the unit cell 3 which is the output or input terminal of the battery module via the connection area 11.
  • connection holes capable of matching the shape of the poles are provided on each of the connection regions 11 so as to be fastened to the corresponding poles, and at the same time in the connection holes.
  • a positioning hole 111 penetrating through the conductive sheet 10 is disposed at the center to facilitate the positioning and welding of the connecting portion 11 and the corresponding pole.
  • the vibration absorbing region 12 includes three convex portions 121 which are continuously disposed in the first direction m and are bent by the conductive sheet 10, and the protruding direction of the convex portion 121 is The angle between the first directions m is 90°, and the convex directions of the adjacent two protrusions 121 are opposite, so that the electrical connection assembly 1 can effectively absorb the electrical connection between the electrical connection assembly 1 and the poles of the unit cells 3. Or the vibration impact force during welding with the module output pole 2, the electrical connection component 1 and the module output pole 2 are usually connected by ultrasonic lap welding.
  • the direction of the ultrasonic welding vibration impact force is the x direction, and the force F in the x direction passes through the three convex portions 121 in sequence, and the three convex portions 121 are contracted and deformed in the x direction, so that a part of the vibration impact force can be absorbed, and The maximum fatigue damage value of the welding to the electrical connection component 1 is greatly reduced, and the electrical connection component 1 is effectively prevented from being cracked.
  • each convex portion 121 of the vibration absorbing region 12 can be effectively absorbed from the single cell 3.
  • the expansion force in the x direction prevents the electrical connection assembly 1 from cracking.
  • the convex space of each convex portion 121 can be utilized to absorb the height difference in the y direction between the unit cells 3 connected to the electrical connection assembly 1, and the electrical connection assembly 1 and the laser penetration welding are ensured tightly. Fit to prevent the occurrence of solder joint problems and ensure the reliability of electrical connections.
  • the convex portions 121 of the vibration absorbing region 12 are continuously disposed to have better vibration absorbing capability, and at the same time, it is possible to avoid stress concentration when the electrical connection assembly 1 is stressed, and to better avoid cracking of the electrical connection assembly 1.
  • the vibration absorption zone 12 and the connection zone 11 are connected by a circular arc transition zone 13.
  • the number of the protrusions 121 is three, but is not limited to three, and may be four or more. Of course, the number of the protrusions 121 is preferably an odd number, as in this embodiment. The three, so that the vibration absorption zone 12 as a whole has a symmetrical structure.
  • the raised portion 121 includes a central raised portion 121a at a central position of the vibration absorbing region 12 and a side raised portion 121b symmetrically distributed on both sides of the central raised portion 121a.
  • the vibration absorbing region 12 preferably adopts an odd number of convex portions 121, that is, a symmetrical structure thereof, which can make the electrical connection assembly 1 more uniformly subjected to the welding force and the expansion force, and further avoid the cracking of the electrical connection assembly 1.
  • the opening width of the central convex portion 121a in the first direction m is larger than the opening width of the side convex portion 121b in the first direction m, and the vibration absorbing capability of the vibration absorbing region 12 can be effectively improved.
  • the convex height of the central convex portion 121a is larger than the convex height of the side convex portion 121b.
  • the vibration absorbing region 12 has the above configuration, and the vibration absorbing capability of the vibration absorbing region 12 can be further improved.
  • the convex height of the central convex portion 121a may also be equal to the convex height of the side convex portion 121b.
  • the processing is convenient on the basis of satisfying the vibration absorption requirement, the occupied space of the entire electrical connection assembly can be reduced, and the electrical connection assembly 1 is less prone to cracking.
  • the width of the vibration absorbing region 12 along the first direction m that is, the sum of the opening widths of the respective convex portions 121 is more than twice the convex height of the central convex portion 121a.
  • the vibration absorbing effect of the vibration absorbing region 12 can be improved, but also the thinning rate requirement of the electrical connection assembly 1 when bending the vibration absorbing region 12 can be satisfied, and the space requirement for application to the battery module can be satisfied. Improve the energy density of the battery module.
  • the opening width of the central convex portion 121a in the first direction m is larger than the opening width of the side convex portion 121b in the first direction m, and/or, the convex height of the central convex portion 121a is larger than the side convex portion 121b
  • the protruding direction of the central convex portion 121a is limited due to space requirements, and in order to prevent the electrical connection assembly 1 from being connected to the corresponding single battery unit 3
  • the foolproof mark 14 in this embodiment is a notch provided on the connecting area 11, so as to be recognized by the operator, or correspondingly The positioning plate cooperates to properly connect the electrical connection assembly 1 to the battery module.
  • the foolproof mark 14 is not limited to the form of a notch.
  • the convex portion, the concave portion, the character, or the like provided on the connecting portion 11 may be used. In combination, as long as the auxiliary operator can be satisfied, the electrical connection component 1 can be prevented from being reversed.
  • the electrical connection assembly 1 of the embodiment shown in FIG. 1 includes only two connection areas 11 and one vibration absorption area 12.
  • the electrical connection assembly 1 of the embodiment of the present application is not limited to the form shown in FIG. FIG. 5 shows a schematic structural view of an electrical connection assembly 1 of another embodiment of the present application.
  • This embodiment is basically the same as the embodiment of the embodiment shown in FIG. 1 , except that the present embodiment includes four connection regions 11 spaced along the first direction m, and each of the four connection regions 11 is adjacent.
  • the two connection areas 11 are connected by a vibration absorption area 12, and the electrical connection component 1 in this embodiment can be simultaneously connected to the poles of the four single cells 3, in different forms of the single battery 3 satisfying the battery module.
  • connection regions 11 and the number of the vibration absorption regions 12 are not limited to those shown in FIGS. 1 and 5, and may be changed according to the series or parallel requirements of the unit cells 3 of the battery module.
  • the electrical connection components 1 shown in the above embodiments all include a conductive sheet 10.
  • a conductive sheet 10 in order to meet the overcurrent requirement when the electrical connection component 1 is applied to the battery module, it is not limited to including only one layer of the conductive sheet 10. In some optional embodiments, two conductive sheets 10 may be included. Please refer to FIG. 6 and FIG. 7 together.
  • FIG. 6 shows a schematic structural view of an electrical connection assembly 1 according to still another embodiment of the present application.
  • the two conductive sheets 10 are disposed, and the two conductive sheets 10 are stacked in the protruding direction of the convex portion 121, which can increase the over-flow requirement of the electrical connection assembly 1 and also have a corresponding vibration absorption effect.
  • the two conductive sheets 10 are of a unitary structure, and can be formed by bending the same conductive sheet.
  • the vibration absorbing regions 12 of the two conductive sheets 10 are fitted to each other, that is, the vibration absorbing regions 12 of the two conductive sheets 10.
  • the protruding directions of the protruding portions 121 are identical to each other and are fastened together, thereby better improving the vibration absorbing capability between the two conductive sheets 10 while saving the space occupied by the electrical connection assembly 1.
  • the electrical connection component 1 shown in FIG. 6 and FIG. 7 is only an example for satisfying the over-flow requirement, and is not limited to including two conductive sheets 10. In specific implementation, three or more layers may be used according to the over-flow requirement.
  • the width of the conductive sheet 10 and the conductive sheet 10 are not particularly limited, and the width of each of the conductive sheets 10 may be equal or unequal as long as the over flow rate requirement and the vibration absorption requirement can be satisfied.
  • FIG. 8 is a partial structural diagram of a battery module according to an embodiment of the present application.
  • the embodiment of the present application further provides a battery module including a plurality of single cells 3, a module output pole 2, and the electrical connection assembly 1 of the above embodiments.
  • the plurality of single cells 3 are connected in series or in parallel through the electrical connection assembly 1.
  • the module output pole 2 is electrically connected to the unit battery 3 as the output or input end of the battery module through the electrical connection assembly 1.
  • the battery module provided by the embodiment of the present invention has the vibration-absorbing capability, is not easy to be damaged, has stable input or output power, has a long service life, and has good safety performance. Easy to promote.

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

Abstract

La présente invention se rapporte à un composant de connexion électrique et à un module de batterie. Le composant de connexion électrique est destiné à être utilisé dans le module de batterie et comprend au moins une plaque électroconductrice. La plaque électroconductrice comprend des zones de connexion réparties à un intervalle dans une première direction et des zones d'absorption des chocs reliées entre chaque paire de zones de connexion adjacentes. Les zones d'absorption des chocs comprennent de multiples parties en saillie disposées de manière consécutive dans la première direction et formées par pliage de la plaque électroconductrice. La direction de saillie des parties en saillie est opposée à la direction de saillie de deux parties en saillie inclinées et adjacentes l'une à l'autre dans la première direction. Du composant de connexion électrique et du module de batterie fournis dans les modes de réalisation de la présente invention, le composant de connexion électrique est capable d'absorber de manière efficace la force d'impact d'une vibration, adaptable à une distension coûteuse d'une batterie unique, et non sujette à la fracturation, ce qui permet au module de batterie d'entrer ou de sortir de manière stable de l'énergie électrique.
PCT/CN2018/124617 2018-03-30 2018-12-28 Composant de connexion électrique et module de batterie WO2019184494A1 (fr)

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CN201820467595.5 2018-03-30
CN201820467595.5U CN207967151U (zh) 2018-03-30 2018-03-30 电连接组件及电池模组

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CN112332040A (zh) * 2020-08-31 2021-02-05 宁德时代新能源科技股份有限公司 电池单体、电池组、用电装置及电池单体的制造方法
CN114122631A (zh) * 2021-11-27 2022-03-01 东莞市万连实业有限公司 一种新型电芯电极转接片的制备方法
CN115836438A (zh) * 2021-01-29 2023-03-21 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备、电池单体的制造方法及设备

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CN207967151U (zh) * 2018-03-30 2018-10-12 宁德时代新能源科技股份有限公司 电连接组件及电池模组
JP7184606B2 (ja) * 2018-11-20 2022-12-06 日本メクトロン株式会社 支持部材及びバッテリモジュール
CN109546067B (zh) * 2018-12-14 2022-03-29 蜂巢能源科技有限公司 汇流排连接结构、模组、电池包和车辆
CN111341990B (zh) * 2018-12-18 2023-08-29 太普动力新能源(常熟)股份有限公司 电池模组
CN110350137A (zh) * 2019-06-27 2019-10-18 恒大新能源科技集团有限公司 一种电池模组引出结构及其制备方法、电池模组和电池包
CN212587615U (zh) * 2020-07-24 2021-02-23 比亚迪股份有限公司 一种电芯组件以及电池
CN217158548U (zh) * 2022-01-25 2022-08-09 湖北亿纬动力有限公司 一种电池连接片、电池模组及电池包
CN115548346B (zh) * 2022-09-23 2024-02-20 厦门海辰储能科技股份有限公司 集流组件及电池

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101652880A (zh) * 2007-02-09 2010-02-17 江森自控帅福得先进能源动力系统有限责任公司 用于电池的汇流排
CN204333293U (zh) * 2014-12-23 2015-05-13 上海比亚迪有限公司 一种电池连接片、电池组、电池包和电动汽车
CN206313023U (zh) * 2016-10-26 2017-07-07 深圳市科达利实业股份有限公司 一种电池互连的软连接件
CN206610860U (zh) * 2017-03-10 2017-11-03 浙江谷神能源科技股份有限公司 一种锂离子电池保险连接片
CN207967151U (zh) * 2018-03-30 2018-10-12 宁德时代新能源科技股份有限公司 电连接组件及电池模组

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101652880A (zh) * 2007-02-09 2010-02-17 江森自控帅福得先进能源动力系统有限责任公司 用于电池的汇流排
CN204333293U (zh) * 2014-12-23 2015-05-13 上海比亚迪有限公司 一种电池连接片、电池组、电池包和电动汽车
CN206313023U (zh) * 2016-10-26 2017-07-07 深圳市科达利实业股份有限公司 一种电池互连的软连接件
CN206610860U (zh) * 2017-03-10 2017-11-03 浙江谷神能源科技股份有限公司 一种锂离子电池保险连接片
CN207967151U (zh) * 2018-03-30 2018-10-12 宁德时代新能源科技股份有限公司 电连接组件及电池模组

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112332040A (zh) * 2020-08-31 2021-02-05 宁德时代新能源科技股份有限公司 电池单体、电池组、用电装置及电池单体的制造方法
CN115836438A (zh) * 2021-01-29 2023-03-21 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备、电池单体的制造方法及设备
CN114122631A (zh) * 2021-11-27 2022-03-01 东莞市万连实业有限公司 一种新型电芯电极转接片的制备方法
CN114122631B (zh) * 2021-11-27 2024-01-26 东莞市万连实业有限公司 一种电芯电极转接片的制备方法

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