WO2024037661A1 - 汇流排组件及电池总成 - Google Patents

汇流排组件及电池总成 Download PDF

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Publication number
WO2024037661A1
WO2024037661A1 PCT/CN2023/122625 CN2023122625W WO2024037661A1 WO 2024037661 A1 WO2024037661 A1 WO 2024037661A1 CN 2023122625 W CN2023122625 W CN 2023122625W WO 2024037661 A1 WO2024037661 A1 WO 2024037661A1
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WO
WIPO (PCT)
Prior art keywords
conductive
battery
assembly according
support
cells
Prior art date
Application number
PCT/CN2023/122625
Other languages
English (en)
French (fr)
Inventor
任朝举
张国江
陆君高
徐宇虹
江吉兵
Original Assignee
惠州亿纬锂能股份有限公司
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 惠州亿纬锂能股份有限公司 filed Critical 惠州亿纬锂能股份有限公司
Publication of WO2024037661A1 publication Critical patent/WO2024037661A1/zh

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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
    • H01M50/50—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
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • 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
    • 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
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • 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
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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 bus assembly and a battery assembly.
  • the busbar in the battery module includes multiple conductive parts.
  • Each conductive part has a positive conductive unit and a negative conductive unit.
  • the conductive parts are electrically connected to two adjacent cells.
  • the positive conductive unit in the conductive part is connected to one of the cells.
  • the positive electrode is connected, and the negative conductive unit is connected to the negative electrode of another cell to connect the two adjacent cells in series.
  • integrated supports or blister parts are generally used as bus carriers to improve the stability of multiple conductive parts.
  • This design has the following defects:
  • the support or blister part In order to prevent the conductive parts from connecting the positive and negative poles of the same battery core, the support or blister part needs to be designed with a groove and hole structure that matches the busbar to insulate other positions of the conductive parts from the battery core. This leads to a complex structure of the support or blister parts, and both the supports and blister parts need to be processed by molds.
  • the mold opening cost is expensive, it is very difficult to modify the mold, and the processing cycle is long;
  • the purpose of this application is to provide a busbar assembly and battery assembly to solve the problems of high processing cost, long cycle time, and risk of battery cell short circuit when using supports or blister parts as busbar carriers.
  • bus assembly including:
  • a conductive component includes a plurality of conductive rows spaced apart along the first direction, the conductive rows include a plurality of conductive parts arranged and connected along the second direction, the conductive parts include connecting parts and conductive units, so The conductive unit is configured to conductively connect two adjacent cells along the first direction;
  • An insulating film covers the conductive component so that a plurality of the conductive rows are connected as one body.
  • the insulating film covers each connection portion in the conductive component, and the insulating film corresponds to each of the conductive rows.
  • the conductive units are all provided with hollow areas so that each conductive unit is exposed.
  • a battery assembly including:
  • a battery core module includes a plurality of battery core components arranged along a second direction, and each of the battery core components includes a plurality of battery cores arranged along a first direction;
  • the conductive bar is configured to connect the cells at corresponding positions in a plurality of the cell assemblies in parallel, and to connect two adjacent cells in the same cell assembly in series.
  • the battery assembly provided by this application uses the above-mentioned busbar assembly, which has low cost and reliable structure.
  • Figure 1 is a top view of the bus assembly provided by the present application.
  • Figure 2 is a top view of the conductive row provided by this application.
  • Figure 3 is a top view of the conductive component provided by the present application.
  • Figure 4 is a top view of the insulating film provided by the present application.
  • Figure 5 is a top view of the semi-finished product provided by this application.
  • Figure 6 is a top view of the insulating film provided by the present application when attached to the semi-finished product
  • FIG. 7 is a schematic structural diagram of the bus assembly provided by this application.
  • Figure 8 is a partial enlarged view of position A in Figure 7;
  • FIG. 9 is a schematic structural diagram of the battery assembly provided by this application.
  • Figure 10 is a schematic structural diagram of the battery assembly provided by this application when the battery module is not assembled;
  • Figure 11 is a schematic structural diagram of the support provided by this application.
  • Figure 12 is the second structural schematic diagram of the support provided by this application.
  • Figure 13 is a partial enlarged view of B in Figure 11;
  • Figure 14 is a schematic structural diagram of the protective cover provided by the present application when it is assembled on the support.
  • Busbar assembly 101. Semi-finished product; 11. Conductive bar; 111. Positive conductive unit; 112. Negative conductive unit; 113. Connection part; 114. Protruding part; 12. Insulating film; 121. Shielding part; 122. Hollow area; 20, bracket; 21, support; 211, first positioning section; 212, second positioning section; 213, fool-proof positioning hole; 214, through hole; 215, chute; 22, fixing piece; 221. Hook; 222, limit slot; 223, slide rail; 23, support part; 24, protective cover; 241, protective seat; 2411, buckle; 242, protective cover; 2421, snap-on arm; 30, output busbar ; 40. Series bus; 50. Flexible circuit board; 60. Battery core module; 61. Tray; 62. Battery core.
  • connection can be a fixed connection, a detachable connection, or an integral body.
  • 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 elements or an interaction between two elements.
  • the term “above” or “below” a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct 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.
  • the bus bar component 10 includes a conductive component and an insulating film 12 .
  • the conductive component includes a plurality of conductive rows 11 spaced apart along the first direction
  • the unit is configured to conductively connect two adjacent battery cores 62 along the first direction X. Wherein, the second direction Y is perpendicular to the first direction X.
  • the insulating film 12 covers the conductive components so that a plurality of spaced conductive rows 11 are connected into one body.
  • the insulating film 12 is provided with a hollow area 122 corresponding to each conductive unit so that the conductive units are exposed for easy connection with the battery core 62 The positive and negative terminals are in contact.
  • a plurality of conductive rows 11 arranged at intervals are connected through an insulating film 12.
  • supports or blister parts for support and fixation. This can eliminate or reduce the use of supports or blister parts, which is beneficial to control of processing. cost, reduce processing difficulty, and improve processing efficiency.
  • the plurality of conductive bars 11 are connected together through the insulating film 12 to form an integrated structure, which can facilitate the assembly of the busbar assembly 10 and improve the assembly efficiency.
  • the conductive bar 11 By covering the portion of the conductive bar 11 that is not in contact with the positive and negative electrodes of the battery core 62 with the insulating film 12 , the conductive bar 11 can be prevented from overlapping the positive and negative electrodes of the same battery core 62 , thereby preventing the battery core 62 from short-circuiting.
  • the insulating film 12 may be made of insulating materials such as polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the conductive unit includes a positive conductive unit 111 and a negative conductive unit 112 located at both ends of the connecting part 113 .
  • the positive conductive unit 111 is configured to be electrically connected to one of the two battery cores 62 adjacent along the first direction X.
  • the positive electrode of the core 62 is connected, and the negative conductive unit 112 is configured to be connected to the negative electrode of the other of the two adjacent battery cores 62 along the first direction X.
  • the dotted lines in FIG. 2 are only to illustrate the connecting portion 113, the positive conductive unit 111 and the negative conductive unit 112 in the conductive member, and are not the structural contour lines in the conductive member.
  • the bus assembly 10 is used in a battery assembly composed of a cylindrical battery core 62 , in which both the positive and negative electrodes are disposed on the same axial end surface of the battery core 62 .
  • the battery assembly includes a battery cell module 60.
  • the battery cell module 60 includes a plurality of battery cell assemblies arranged along the second direction Y, and each battery cell assembly includes a plurality of battery cells 62 arranged along the first direction X.
  • the conductive bar 11 includes four connected conductive parts, and the four conductive parts are respectively connected to the corresponding positions in the four battery modules.
  • the battery cores 62 cooperate, that is, a conductive row 11 connects the battery cores 62 at corresponding positions in the four battery core assemblies in parallel.
  • the positive conductive unit 111 in each conductive member is connected to the positive electrode of the previous cell 62 in the same cell assembly, and the negative conductive unit 112 is connected to the negative electrode of the subsequent cell 62 in the same cell assembly. That is, each conductive member connects two adjacent cells 62 in the same cell assembly in series.
  • the number of conductive members included in the conductive row 11 and the number of the conductive rows 11 can be set according to the number and arrangement of the cells 62 in the battery assembly to be compatible with different models of battery assemblies.
  • the insulating film 12 includes a shielding portion 121 and a hollow area 122.
  • the shielding portion 121 covers and connects the connecting portion 113 of each conductive row 11.
  • the hollow area 122 is directly opposite to the positive conductive unit 111 and the negative conductive unit 112. So that the positive conductive unit 111 and the negative conductive unit 112 are exposed.
  • the front and back sides of the conductive component are covered with an insulating film 12 .
  • the insulating film 12 may cover at least one side surface of the connecting portion 113 facing the battery core 62 .
  • the busbar assembly 10 provided in this embodiment has a simple structure and a simple processing technology, which is beneficial to improving production efficiency and reducing costs.
  • the rolled plate of conductive material can be flattened and then cut into rectangular plates of appropriate size.
  • the rectangular plate is then processed into a semi-finished product 101 as shown in FIG. 5 by stamping.
  • the adjacent conductive rows 11 in the semi-finished product 101 are partially connected to facilitate positioning and fixing with the insulating film 12 .
  • a rectangular insulating layer of the same size is taken, and a hollow area 122 is processed on the insulating layer through a die-cutting process to obtain the insulating film 12 as shown in FIG. 4 .
  • a die-cutting process By die-cutting the profiling structure and wrapping the non-welded areas of the conductive components, multiple conductive rows 11 are connected into one, which not only ensures the insulation effect between the battery core 62 and the conductive row 11, but also reduces the process difficulty. Significantly reduced costs and improved industrialization efficiency.
  • the insulating film 12 is attached to the semi-finished product 101 , and the insulating film 12 and the semi-finished product 101 are fixed through a thermoplastic process. After being fixed, the connection positions of the two adjacent conductive bars 11 are cut off through a stamping and bending process to obtain the busbar assembly 10 as shown in FIG. 1 .
  • a protruding portion 114 is punched out on the connecting portion 113 , and the protruding portion 114 protrudes in a direction away from the battery core 62 .
  • the bus assembly 10 is assembled with the battery module 60, the positive conductive unit 111 on the same conductive member is in contact with the positive electrode of the previous battery cell 62, and the negative conductive unit 112 is in contact with the negative electrode of the subsequent battery core 62.
  • the protruding portion 114 is located between two adjacent battery cores 62 and can buffer the expansion force, tolerance and displacement between the two adjacent battery cores 62 to avoid breakage of the conductive row 11 and improve the durability of the conductive row 11
  • the busbar assembly 10 has high toughness and high reliability.
  • each conductive component is provided with an insulating film 12 correspondingly to be compatible with battery core modules 60 of different specifications.
  • this embodiment also provides a battery assembly, including a battery module 60 , a bracket 20 , an output bus 30 , a series bus 40 and the above-mentioned bus assembly 10 .
  • the bracket 20 includes two supports 21 oppositely arranged along the first direction
  • the two supports 21 are smaller in size than the plastic bracket, and their upper structure is smaller than the plastic bracket.
  • the insulating film 12 connects multiple conductive rows 11 and can easily adjust the number of conductive rows 11, making the design highly compatible.
  • the output bus 30 and the series bus 40 are supported by the support 21 and the insulation protection of the output bus 30 and the series bus 40 is realized.
  • the insulation protection of the bus assembly 10 is realized by the insulating film 12 to ensure electrical safety.
  • the two battery cells 62 at both ends of each battery cell assembly are defined as end cells.
  • the supports 21 can be fixed on the end cells at both ends of the battery cell assembly.
  • Each support 21 is provided with avoidance holes. The holes can avoid the positive and negative electrodes on the battery cores 62, so that the battery cores 62 at the first and last ends can be connected in series and parallel with other battery cores 62.
  • Each support 21 is provided with an output bus 30 and a series bus 40 .
  • the two output bus bars 30 can respectively serve as the input terminal and the output terminal of the circuit formed by the serial and parallel connection of the battery cells 62 in the battery assembly.
  • some of the end cells on one side form the input end of the battery module 60
  • some of the end cells on the other side form the output end of the battery module 60 .
  • one output bus bar 30 is connected to the positive electrode of the end battery cell at the input end of the battery cell module 60
  • the output bus bar 30 serves as the positive output bus bar;
  • the other output bus bar 30 is connected to the battery cell.
  • the output terminal of the module 60 is connected to the negative terminal of the cell, and the output bus 30 serves as the negative output bus.
  • the series bus 40 is configured to connect the remaining end cells on the corresponding side.
  • the terminal cells at the input end can be connected to the output bus 30 through the negative electrode, and correspondingly, the end cells at the output end can be connected to the output bus 30 through the positive electrode.
  • the bottom surface of the support 21 is provided with a cell profiling groove, and the end cells of each cell assembly can be inserted into the corresponding cell profiling groove to make the support 21 more secure. Stablize.
  • the avoidance hole is provided on the bottom surface of the battery cell profiling groove to facilitate the contact between the positive and negative electrodes of the end battery cells and the corresponding output bus 30 or series bus 40 .
  • the output bus 30 and the series bus 40 are fixed through the support 21 to achieve insulation protection and avoid short circuit of the battery core 62 .
  • a positioning groove is provided on the top surface of the support 21.
  • the positioning groove includes a first positioning section 211 and a second positioning section 212.
  • the first positioning section 211 is connected to the output confluence.
  • the shape and size of the row 30 match, and the output bus 30 is installed in the first positioning section 211;
  • the second positioning section 212 matches the shape and size of the series bus 40, and the series bus 40 is installed in the second positioning section 211.
  • the positioning grooves the positioning accuracy of the output bus 30 and the series bus 40 can be ensured, and misalignment of the output bus 30 and the series bus 40 resulting in a short circuit of the battery core 62 can be avoided.
  • Positioning posts are provided in the positioning groove, and positioning holes are provided on both the output bus bar 30 and the series bus bar 40.
  • the positioning posts can cooperate with the positioning holes to improve the positions of the output bus bar 30 and the series bus bar 40 on the support 21. Precision and fixation effect prevent the output bus 30 and the series bus 40 from being misaligned.
  • the battery assembly also includes a flexible circuit board 50.
  • the flexible circuit board 50 is provided on the support 21.
  • One of the flexible circuit board 50 and the support 21 is provided with a fool-proof positioning hole 213, and the other is provided with a fool-proof positioning post. , the fool-proof positioning post is inserted into the fool-proof positioning hole 213.
  • the battery cell module 60 includes a tray 61 that supports the battery cells 62.
  • the battery cells 62 are fixed on the tray 61 to be integrated into a module.
  • the support 21 is provided with a support part 23.
  • the support part 23 can be fixed to the tray 61 through screws, which is beneficial to ensuring the output bus 30 and the series bus. 40 and the connection reliability of the terminal cells.
  • the support portion 23 can also increase the strength of the support 21, thereby improving the structural strength of the entire battery assembly.
  • the battery assembly In order to obtain the operating status of the battery assembly in time, the battery assembly also includes voltage and temperature acquisition wiring harnesses.
  • the plastic parts have a roughly flat structure and are thin, making it impossible to reliably install the collection wire harness connector, resulting in problems such as difficulty in fixing the collection wire harness connector and poor signal collection reliability.
  • the bracket 20 also includes a fixing part 22 configured to install the collection harness connector.
  • the fixing part 22 can be disassembled and disposed on the support 21 to provide an installation position for the collection wire harness connector. After the collection wire harness connector and the fixing part 22 are installed first, the fixing part 22 can be fixed on the support 21 so that The installation of the acquisition harness connector is not restricted and is easy to assemble.
  • the fixing member 22 and the support 21 are assembled in a sliding manner.
  • the fixing member 22 is provided with a slide rail 223, and the support 21 is provided with a slide groove 215 extending along the first direction.
  • the slide groove 215 penetrates one side end surface of the support 21, and the slide rail 223 can be slid into the slide rail from the side end surface. In slot 215, installation is easy.
  • the width of at least part of the chute 215 gradually decreases from top to bottom, so that the width of the slot of the chute 215 shrinks.
  • the shape of the slide rail 223 is adapted to the slide groove 215 .
  • the side wall of the slide groove 215 exerts an upward contact force on the slide rail 223 to prevent the slide rail 223 from detaching downward from the slide groove 215.
  • at least part of the chute 215 is a dovetail groove.
  • the fixing part 22 is locked with the support 21 after being slid in, so as to improve the fixing effect between the support 21 and the fixing part 22.
  • the slide groove 215 is provided with a snap-in portion
  • the slide rail 223 is provided with a snap-in slot. When the slide rail 223 slides into the slide slot 215, the snap-in portion snaps into the snap-in slot to fix the support 21 and Fastener 22.
  • the fixing member 22 adopts sliding installation and clamping fixation, which can ensure that the fixing member 22 is firmly installed on the support 21, facilitates the installation of the collection harness connector, and ensures the reliability of signal collection.
  • the collection harness connector can be fixed on the fixing member 22 by snapping.
  • the fixing member 22 is provided with a hook 221 , and the hook 221 is configured to engage the collection wire harness connector.
  • the support 21 is also provided with a through hole 214 penetrating along the first direction.
  • the end of the flexible circuit board 50 located on the top surface of the support 21 can extend into the side of the support 21 through the through hole 214 and be fixed. in the fixture 22.
  • a limiting slot 222 is provided on the fixing member 22.
  • the upper end of the limiting slot 222 is open, and at least part of the end of the flexible circuit board 50 protrudes from the through hole 214. can extend into the limiting groove 222 to fix the flexible circuit board 50 .
  • the battery assembly also includes a protective cover 24.
  • the protective cover 24 includes a protective base 241 and a protective cover 242.
  • the protective base 241 is provided on the support 21.
  • the protective base 241 It is configured to fix the end of the output bus 30; the protective cover 242 is covered on the protective base 241, and the end of the output bus 30 is located between the protective base 241 and the protective cover 242 to pass through the protective base 241 and the protective cover 242.
  • Cooperation has a protective effect on the output bus 30 .
  • the protective cover 242 and the protective base 241 are detachably connected to facilitate the disassembly and assembly of the end of the output bus 30 .
  • the protective base 241 is provided with a buckle 2411, and the protective cover 242 is provided with two downwardly extending engaging arms 2421 opposite each other, and the engaging arms 2421 are provided with engaging holes.
  • the clamping arm 2421 is deformed due to force, and the distance between the two clamping arms 2421 increases. until the buckle 2411 extends into the hole, and the protective cover 242 and the protective base 241 are assembled in place.
  • the protective cover 242 and the protective base 241 are fixed in the above manner, which not only facilitates disassembly and assembly, but also provides good protection for the output end of the output bus 30 .

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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)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请属于电池技术领域，公开了一种汇流排组件及电池总成。该汇流排组件包括导电组件和绝缘膜，导电组件包括多个沿第一方向间隔设置的导电排，导电排包括沿第二方向排列且连接的多个导电件，导电件包括连接部以及导电单元，导电单元设置为导电连接沿第一方向相邻的两个电芯；绝缘膜覆盖于导电组件上，以使多个导电排连接呈一体，绝缘膜覆盖导电组件中的每个连接部，且绝缘膜对应每个导电单元均设置有镂空区，以使每个导电单元外露。

Description

汇流排组件及电池总成
本申请要求在2022年11月01日提交中国专利局、申请号为202211352824.6的中国专利申请、在2023年06月30日提交中国专利局、申请号为202321701544.1的中国专利申请的优先权，这些申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，例如涉及一种汇流排组件及电池总成。
 背景技术
电池模组中汇流排包括多个导电件，每个导电件均具有正极导电单元和负极导电单元，导电件电连接相邻的两个电芯，导电件中的正极导电单元与其中一个电芯的正极连接，负极导电单元与另一个电芯的负极连接，以将相邻的两个电芯串联。
相关技术中，一般使用一体式支座或吸塑件作为汇流排的载体，以提高多个导电件的稳定性，这种设计存在以下缺陷：
1、为避免导电件将同一电芯的正极和负极连通，支座或吸塑件需要设计与汇流排相配合的凹槽和孔洞结构，以将导电件的其他位置与电芯之间绝缘，导致支座或吸塑件的结构复杂，而支座和吸塑件都需要使用模具加工，开模成本昂贵，修改模具非常困难，同时需要的加工周期长；
2、由于支座或吸塑件存在加工误差，导致汇流排与支座或吸塑件装配后存在误差，汇流排存在将电芯的正负极搭接导致电芯短路的风险。
 技术问题
本申请的目的在于提供一种汇流排组件及电池总成，以解决使用支座或吸塑件作为汇流排载体时导致加工成本高、周期长、存在电芯短路风险的问题。
 解决方案
为达此目的，本申请采用以下技术方案：
第一方面，本申请实施例提供一种汇流排组件，包括：
导电组件，所述导电组件包括多个沿第一方向间隔设置的导电排，所述导电排包括沿第二方向排列且连接的多个导电件，所述导电件包括连接部以及导电单元，所述导电单元设置为导电连接沿所述第一方向相邻的两个电芯；
绝缘膜，覆盖于所述导电组件上，以使多个所述导电排连接呈一体，所述绝缘膜覆盖所述导电组件中的每个所述连接部，且所述绝缘膜对应每个所述导电单元均设置有镂空区，以使每个所述导电单元外露。
第二方面，本申请实施例提供一种电池总成，包括：
电芯模组，包括沿第二方向排列的多个电芯组件，每个所述电芯组件包括沿第一方向排列的多个电芯；
上述的汇流排组件，所述导电排设置为将多个所述电芯组件中对应位置的所述电芯并联，并将同一所述电芯组件中相邻的两个所述电芯串联。
 有益效果
本申请的有益效果：
本申请提供的汇流排组件中，通过绝缘膜连接多个导电排，并实现绝缘防护，不需设置塑胶件或吹塑件来安装导电排，有利于降低生产成本，且绝缘膜实现的绝缘防护效果好。
本申请提供的电池总成采用上述汇流排组件，成本低，结构可靠。
 附图说明
图1是本申请提供的汇流排组件的俯视图；
图2是本申请提供的导电排的俯视图；
图3是本申请提供的导电组件的俯视图；
图4是本申请提供的绝缘膜的俯视图；
图5是本申请提供的半成品的俯视图；
图6是本申请提供的绝缘膜贴附在半成品上时的俯视图；
图7是本申请提供的汇流排组件的结构示意图；
图8是图7中A处的局部放大图；
图9是本申请提供的电池总成的结构示意图；
图10是本申请提供的电池总成中未装配电芯模组时的结构示意图；
图11是本申请提供的支座的结构示意图一；
图12是本申请提供的支座的结构示意图二；
图13是图11中B处的局部放大图；
图14是本申请提供的保护罩装配于支座上时的结构示意图。
图中：
10、汇流排组件；101、半成品；11、导电排；111、正极导电单元；112、负极导电单元；113、连接部；114、凸起部；12、绝缘膜；121、遮挡部；122、镂空区；20、支架；21、支座；211、第一定位段；212、第二定位段；213、防呆定位孔；214、通孔；215、滑槽；22、固定件；221、卡钩；222、限位槽；223、滑轨；23、支撑部；24、保护罩；241、保护座；2411、卡扣；242、保护盖；2421、卡接臂；30、输出汇流排；40、串联汇流排；50、柔性电路板；60、电芯模组；61、托盘；62、电芯。
 本发明的实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本实施例的描述中，术语“上”、“下”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。
本实施例提供了一种汇流排组件10，设置为连接呈多排设置的多个电芯62。如图1-图4所示，汇流排组件10包括导电组件和绝缘膜12。导电组件包括多个沿第一方向X间隔设置的导电排11，每个导电排11包括沿第二方向Y排列且连接的多个导电件，每个导电件包括连接部113以及导电单元，导电单元设置为将沿第一方向X相邻的两个电芯62导电连接。其中，第二方向Y与第一方向X垂直。绝缘膜12覆盖在导电组件上，以使多个间隔设置的导电排11连接成一体，绝缘膜12上对应每个导电单元均设置有镂空区122，以使导电单元外露，以便与电芯62的正极和负极接触。
本实施例中，多个间隔设置的导电排11通过绝缘膜12连接，无需使用支座或吸塑件进行支撑和固定，能够省去或减少使用的支座或吸塑件，有利于控制加工成本，降低加工难度，提高加工效率。多个导电排11通过绝缘膜12连接在一起后成为一体结构，能够方便汇流排组件10的装配，提高装配效率。通过绝缘膜12覆盖导电排11上不与电芯62的正极和负极接触的部分，能够避免导电排11将同一电芯62的正极和负极搭接，从而避免电芯62短路。
可选地，绝缘膜12可以由聚对苯二甲酸乙二醇酯(Polyethylene Terephthalate，PET)等绝缘材料制成。
如图2所示，导电单元包括位于连接部113两端的正极导电单元111和负极导电单元112，正极导电单元111设置为与沿第一方向X相邻的两个电芯62中的其中一个电芯62的正极连接，负极导电单元112设置为与沿第一方向X相邻两个电芯62中另一个电芯62的负极连接。图2中虚线仅是为了示出导电件中的连接部113、正极导电单元111和负极导电单元112，并非导电件中的结构轮廓线。
本实施例中，汇流排组件10用在圆柱型的电芯62组成的电池总成中，圆柱型的电芯62中正极和负极均设置在电芯62的同一轴向端面上。电池总成包括电芯模组60，电芯模组60包括多个沿第二方向Y排列的电芯组件，每个电芯组件包括沿第一方向X排列的多个电芯62。
为方便介绍汇流排组件10与电芯模组60的配合关系，如图3所示，导电排11包括相连接的四个导电件，四个导电件分别与四个电芯组件中对应位置处的电芯62配合，即一个导电排11将四个电芯组件中对应位置处的电芯62并联。每个导电件中的正极导电单元111连接同一电芯组件中前一个电芯62的正极，负极导电单元112连接同一电芯组件中后一个电芯62的负极。即每个导电件串联同一电芯组件中相邻的两个电芯62。
在其他实施例中，导电排11中包括的导电件的数量以及导电排11的数量均可以根据电池总成中电芯62的数量以及排布情况设定，以兼容不同型号的电池总成。
如图4所示，绝缘膜12包括遮挡部121和镂空区122，遮挡部121覆盖并连接每个导电排11的连接部113，镂空区122与正极导电单元111和负极导电单元112正对，以使正极导电单元111和负极导电单元112外露。
为避免电芯62短路，本实施例中导电组件的正面和背面均覆盖有绝缘膜12。一些实施例中，绝缘膜12可以至少覆盖连接部113的朝向电芯62的一侧表面。
本实施例提供的汇流排组件10的结构简单，加工工艺简单，有利于提高生产效率，降低成本。
在制备汇流排组件10时，可以将导电材质的卷板展平后切割成合适大小的矩形板。之后通过冲压方式，将矩形板加工成如图5所示的半成品101，该半成品101中相邻的导电排11部分处于连接状态，以方便与绝缘膜12定位和固定。
同时，取相同大小的矩形绝缘层，通过模切工艺在绝缘层上加工镂空区122，以得到如图4所示的绝缘膜12。通过模切出仿形结构，对导电组件的非焊接区域进行包裹，使多个导电排11连成一体，不仅能够保证电芯62与导电排11之间的绝缘效果，降低了工艺难度，而且大幅度降低了成本，提高了产业化效率。
最后，如图6所示，将绝缘膜12贴附在半成品101上，并通过热塑胶工艺将绝缘膜12与半成品101固定。待固定后，通过冲压折弯工艺，将相邻的两个导电排11的连接位置切断，得到如图1所示的汇流排组件10。
如图7和图8所示，在冲压弯折工艺时，在连接部113上冲压出凸起部114，凸起部114向背离电芯62的方向凸出。当汇流排组件10与电芯模组60装配后，同一个导电件上的正极导电单元111与前一个电芯62的正极抵接，负极导电单元112与后一个电芯62的负极抵接，凸起部114位于相邻两个电芯62之间，能够起到缓冲相邻两个电芯62之间的膨胀力、公差以及位移的作用，避免导电排11断裂，提高了导电排11的韧性，汇流排组件10的可靠性高。
可选地，导电组件设置有多个并沿第二方向Y间隔设置，每个导电组件均对应设置有绝缘膜12，以兼容不同规格的电芯模组60。
如图9和图10所示，本实施例还提供了一种电池总成，包括电芯模组60、支架20、输出汇流排30、串联汇流排40和上述的汇流排组件10。
支架20包括沿第一方向X相对设置的两个支座21，支座21可以为塑胶件或吹塑件，支座21设置为安装输出汇流排30和串联汇流排40。本实施例中，通过两个支座21和绝缘膜12的协同配合，代替了相关技术中一体式的塑料支架，两个支座21相比塑料支架的尺寸小，其上结构相比塑料支架更少，加工方便、成本低；同时，绝缘膜12连接多个导电排11，能够方便调整导电排11的数量，使该设计具有高兼容性。通过支座21支撑输出汇流排30和串联汇流排40，并实现输出汇流排30和串联汇流排40的绝缘防护，通过绝缘膜12实现汇流排组件10的绝缘防护，确保电气安全。
定义每个电芯组件两端的两个电芯62为端部电芯，支座21能固定在电芯组件首尾两端的端部电芯上，每个支座21上均设置有避让孔，避让孔能够避让电芯62上的正极和负极，以方便首尾两端的电芯62与其他电芯62串并联。
每个支座21上均设置有输出汇流排30和串联汇流排40。两个输出汇流排30可以分别作为电池总成中电芯62串并联形成电路的输入端和输出端。多排电芯组件中，一侧的部分端部电芯组成电芯模组60的输入端，另一侧的部分端部电芯组成电芯模组60的输出端。两个输出汇流排30中，一个输出汇流排30与电芯模组60的输入端的端部电芯的正极连接，该输出汇流排30作为正极输出汇流排；另一个输出汇流排30与电芯模组60的输出端的端部电芯的负极连接，该输出汇流排30作为负极输出汇流排。串联汇流排40设置为连接对应侧的其余端部电芯。
其他实施例中，输入端的端部电芯可以通过负极与输出汇流排30连接，对应地，输出端的端部电芯可以通过正极与输出汇流排30连接。
为提高支座21的固定效果，支座21的底面设置有电芯仿形槽，每个电芯组件的端部电芯均能插入对应的电芯仿形槽内，以使支座21更稳定。
避让孔设置在电芯仿形槽的底面，以方便端部电芯的正极和负极与对应的输出汇流排30或串联汇流排40接触。
本实施例中，通过支座21来固定输出汇流排30和串联汇流排40，能够实现绝缘保护，避免电芯62短路。
为了避免电芯62短路，如图11和图12所示，支座21的顶面设置有定位槽，定位槽包括第一定位段211和第二定位段212，第一定位段211与输出汇流排30的形状及大小相适配，输出汇流排30安装于第一定位段211内；第二定位段212与串联汇流排40的形状及大小相适配，串联汇流排40安装于第二定位段212内。通过设置定位槽，能够保证输出汇流排30和串联汇流排40的定位精度，能够避免输出汇流排30和串联汇流排40错位而导致电芯62短路。
定位槽内设置有定位柱，输出汇流排30和串联汇流排40上均设置有定位孔，定位柱能够与定位孔配合，以提高输出汇流排30和串联汇流排40在支座21上的位置精度和固定效果，避免输出汇流排30和串联汇流排40错位。
电池总成还包括柔性电路板50，柔性电路板50设置在支座21上，柔性电路板50和支座21二者中的一个设置有防呆定位孔213，另一个设置有防呆定位柱，防呆定位柱插入防呆定位孔213内。通过设置防呆定位孔213和防呆定位柱，既能保证柔性电路板50的安装精度，又能预防柔性电路板50的安装位置错乱，能够降低装配难度。
为提高电池总成的模块化程度，电芯模组60包括承托电芯62的托盘61，电芯62固定在托盘61上，以集成为模组。为提高汇流排组件10与电芯模组60之间配合稳定性，支座21上设置有支撑部23，支撑部23可以通过螺钉与托盘61固定，有利于保证输出汇流排30和串联汇流排40与端部电芯的连接可靠性。支撑部23还能够提高支座21的强度，使整个电池总成的结构强度得到提升。
为了及时获取电池总成的运行状态，电池总成还包括电压和温度采集线束。塑胶件大致呈平板结构，厚度较薄，无法可靠安装采集线束连接器，导致采集线束连接器存在固定困难，信号采集可靠性差的问题。
支架20还包括固定件22，固定件22设置为安装采集线束连接器。固定件22可拆装设置在支座21上，以为采集线束连接器提供安装位置，且可以先将采集线束连接器与固定件22安装后，再将固定件22固定在支座21上，使采集线束连接器的安装不受限，装配方便。
本实施例中，如图13所示，固定件22与支座21采用滑动方式装配。固定件22上设置有滑轨223，支座21上设置有沿第一方向延伸的滑槽215，滑槽215贯穿支座21的一侧端面，滑轨223能够由该侧端面滑动装入滑槽215内，安装方便。
至少部分滑槽215的宽度由上至下逐渐减小，以使滑槽215的槽口宽度收缩。滑轨223的形状与滑槽215相适配。当滑轨223滑入滑槽215内后，滑槽215的侧壁会对滑轨223施加向上的抵接力，避免滑轨223向下与滑槽215脱离。可选地，至少部分滑槽215为燕尾槽。
为避免固定件22与支座21脱离，固定件22在滑动装入后与支座21卡接，以提高支座21与固定件22的固定效果。示例性地，滑槽215内设置有卡接部，滑轨223上设置有卡槽，当滑轨223滑入滑槽215内后，卡接部卡入卡槽内，以固定支座21和固定件22。
本实施例中，固定件22采用滑动安装配合卡接固定，能够保证固定件22稳固安装在支座21上，方便安装采集线束连接器，保证信号采集的可靠性。
可选地，采集线束连接器可以通过卡接固定在固定件22上。如图13所示，固定件22上设置有卡钩221，卡钩221设置为卡接采集线束连接器。
支座21上还设置有沿第一方向贯穿的通孔214，位于支座21顶面的柔性电路板50的端部能够穿过该通孔214伸入到支座21的侧部，并固定在固定件22内。
为提高柔性电路板50端部在固定件22上的固定效果，固定件22上设置有限位槽222，限位槽222的上端开口，由通孔214伸出的柔性电路板50的至少部分端部能够伸入到限位槽222内，以起到固定柔性电路板50的作用。
为了保护输出汇流排30的端部，如图14所示，电池总成还包括保护罩24，保护罩24包括保护座241和保护盖242，保护座241设置在支座21上，保护座241设置为固定输出汇流排30的端部；保护盖242罩设在保护座241上，输出汇流排30的端部位于保护座241和保护盖242之间，以通过保护座241和保护盖242的配合对输出汇流排30起到保护作用。
保护盖242与保护座241可拆装连接，以方便拆装输出汇流排30的端部。保护座241上设置有卡扣2411，保护盖242上相对设置有两个向下延伸的卡接臂2421，卡接臂2421上设置有卡孔。在保护盖242与保护座241装配的情况下，将保护盖242由上向下罩设在保护座241上的过程中，卡接臂2421受力变形，两个卡接臂2421之间距离增大，直至卡扣2411伸入卡孔，保护盖242与保护座241装配到位。保护盖242和保护座241采用上述方式固定，不仅能够方便拆装，而且能够对输出汇流排30的输出端进行很好的保护。

Claims (24)

  1. 一种汇流排组件，包括：
    导电组件，所述导电组件包括多个沿第一方向间隔设置的导电排（11），所述导电排（11）包括沿第二方向排列且连接的多个导电件，所述导电件包括连接部（113）以及导电单元，所述导电单元设置为导电连接沿所述第一方向相邻的两个电芯（62）；
    绝缘膜（12），覆盖于所述导电组件上，以使多个所述导电排（11）连接呈一体，所述绝缘膜（12）覆盖所述导电组件中的每个所述连接部（113），且所述绝缘膜（12）对应每个所述导电单元均设置有镂空区（122），以使每个所述导电单元外露。
  2. 根据权利要求1所述的汇流排组件，其中，所述导电单元包括分别位于所述连接部（113）两端的正极导电单元（111）和负极导电单元（112），所述正极导电单元（111）设置为与沿所述第一方向相邻的两个所述电芯（62）中的其中一个所述电芯（62）的正极连接，所述负极导电单元（112）设置为与沿所述第一方向相邻的两个所述电芯（62）中另一个所述电芯（62）的负极连接；所述绝缘膜（12）对应每个所述正极导电单元（111）和所述负极导电单元（112）均设置有所述镂空区（122），以使每个所述正极导电单元（111）和所述负极导电单元（112）外露。
  3. 根据权利要求1或2所述的汇流排组件，其中，所述绝缘膜（12）至少覆盖所述连接部（113）朝向所述电芯（62）的一侧表面。
  4. 根据权利要求1或2所述的汇流排组件，其中，所述连接部（113）向背离所述电芯（62）的方向凸出以形成凸起部（114）。
  5. 根据权利要求4所述的汇流排组件，其中，所述凸起部（114）位于其所在的所述导电件连接的相邻两个所述电芯（62）之间。
  6. 根据权利要求1或2所述的汇流排组件，其中，所述导电组件设置有多个并沿所述第二方向间隔设置，每个所述导电组件均对应设置有所述绝缘膜（12）。
  7. 根据权利要求1或2所述的汇流排组件，其中，所述绝缘膜（12）与所述导电组件通过热塑胶工艺固定。
  8. 一种电池总成，包括：
    电芯模组（60），包括沿第二方向排列的多个电芯组件，每个所述电芯组件包括沿第一方向排列的多个电芯（62）；
    如权利要求1-7中任一项所述的汇流排组件，所述导电排（11）设置为将多个所述电芯组件中对应位置的所述电芯（62）并联，并将同一所述电芯组件中相邻的两个所述电芯（62）串联。
  9. 根据权利要求8所述的电池总成，其中，位于所述电芯组件两端的两个所述电芯（62）为端部电芯，位于所述电芯模组（60）一端的至少部分所述端部电芯为输入端电芯，位于所述电芯模组（60）另一端的至少部分所述端部电芯为输出端电芯；
    所述电池总成还包括：
    两个输出汇流排（30），所述汇流排组件设置于两个所述输出汇流排（30）之间，两个所述输出汇流排（30）中的其中一个与所述输入端电芯连接，以将多个所述输入端电芯并联；另一个与所述输出端电芯连接，以将多个所述输出端电芯并联。
  10. 根据权利要求9所述的电池总成，所述电池总成还包括：
    沿第一方向相对设置的两个支座（21），所述支座（21）能固定在所述端部电芯上，所述支座（21）上设置有避让对应所述端部电芯上正极和负极的避让孔，所述汇流排组件设置于两个所述支座（21）之间，所述输出汇流排（30）设置在所述支座（21）上。
  11. 根据权利要求10所述的电池总成，其中，所述支座（21）的底面设置有电芯仿形槽，所述端部电芯能插入所述电芯仿形槽内，所述避让孔设置于所述电芯仿形槽的底面。
  12. 根据权利要求10所述的电池总成，其特征在于，所述电池总成还包括：
    串联汇流排（40），每个所述支座（21）上均设置有所述串联汇流排（40），所述串联汇流排（40）设置为电连接所述电芯模组（60）中未与所述输出汇流排（30）连接的所述端部电芯。
  13. 根据权利要求12所述的电池总成，其中，所述支座（21）的顶面设置有定位槽，所述输出汇流排（30）和所述串联汇流排（40）均设置于所述定位槽内。
  14. 根据权利要求13所述的电池总成，其中，所述定位槽包括第一定位段（211）和第二定位段（212），所述第一定位段（211）的形状及大小与所述输出汇流排（30）的形状及大小相适配，所述输出汇流排（30）设置于所述第一定位段（211）内；
    所述第二定位段（212）的形状及大小与所述串联汇流排（40）的形状及大小相适配，所述串联汇流排（40）设置于所述第二定位段（212）内。
  15. 根据权利要求13所述的电池总成，其中，所述定位槽内对应所述输出汇流排（30）和所述串联汇流排（40）均设置有定位柱，所述输出汇流排（30）和所述串联汇流排（40）均设置有能与所述定位柱配合的定位孔。
  16. 根据权利要求10-15中任一项所述的电池总成，所述电池总成还包括柔性电路板（50），所述柔性电路板（50）设置在所述支座（21）上，所述柔性电路板（50）和所述支座（21）二者中的一个设置有防呆定位孔（213），另一个设置有防呆定位柱，所述防呆定位柱插入所述防呆定位孔（213）内。
  17. 根据权利要求16所述的电池总成，其特征在于，所述电池总成还包括固定件（22），所述固定件（22）可拆装装配于所述支座（21）上，所述固定件（22）设置为安装采集线束连接器。
  18. 根据权利要求17所述的电池总成，其中，所述支座（21）上设置有滑槽（215），所述滑槽（215）沿第一方向贯穿所述支座（21）的端面，所述固定件（22）上设置有滑轨（223），所述滑轨（223）能滑动安装于所述滑槽（215）内。
  19. 根据权利要求17所述的电池总成，其中，所述固定件（22）与所述支座（21）卡接固定。
  20. 根据权利要求17所述的电池总成，其中，所述固定件（22）设置于所述支座（21）的侧面，所述支座（21）上设置有沿所述第一方向贯穿的通孔（214），位于所述支座（21）顶面的所述柔性电路板（50）穿过所述通孔（214）设置，并固定于所述固定件（22）内。
  21. 根据权利要求20所述的电池总成，其中，所述固定件（22）上设置有一端开口的限位槽（222），从所述通孔（214）伸出的所述柔性电路板（50）的至少部分端部插入所述限位槽（222）内。
  22. 根据权利要求10-15中任一项所述的电池总成，其特征在于，所述电池总成还包括：
    保护座（241），设置于所述支座（21）上，所述保护座（241）设置为固定所述输出汇流排（30）的端部；
    保护盖（242），可拆装设置于所述保护座（241）上。
  23. 根据权利要求22所述的电池总成，其中，所述保护盖（242）的相对两侧设置有向下延伸的卡接臂（2421），所述卡接臂（2421）上设置有卡孔，所述保护座（241）上设置有卡扣（2411），所述卡扣（2411）与对应的所述卡接臂（2421）上的所述卡孔卡接配合。
  24. 根据权利要求10-15中任一项所述的电池总成，所述电芯模组（60）还包括承托所述电芯（62）的托盘（61），所述支座（21）上设置有支撑部（23），所述支撑部（23）与所述托盘（61）固定。
PCT/CN2023/122625 2022-11-01 2023-09-28 汇流排组件及电池总成 WO2024037661A1 (zh)

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