WO2020215931A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2020215931A1
WO2020215931A1 PCT/CN2020/080025 CN2020080025W WO2020215931A1 WO 2020215931 A1 WO2020215931 A1 WO 2020215931A1 CN 2020080025 W CN2020080025 W CN 2020080025W WO 2020215931 A1 WO2020215931 A1 WO 2020215931A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
conductive
battery module
conductive area
adhesive
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PCT/CN2020/080025
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English (en)
French (fr)
Inventor
梁士杰
王鹏
朱贤春
姜利文
Original Assignee
宁德时代新能源科技股份有限公司
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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 WO2020215931A1 publication Critical patent/WO2020215931A1/zh

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • 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 technical field of energy storage devices, in particular to a battery module.
  • the existing battery module includes a battery unit and a signal collection component.
  • the signal collection component is used to collect the voltage and temperature of the battery unit. It includes a first circuit board and a second circuit board. The two circuit boards are electrically connected through a connector. Connected, and the two circuit boards are welded to the connector. However, an aluminum oxide film is formed on the surface of the circuit board, which greatly reduces the reliability of soldering between it and the connector.
  • the present application provides a battery module to solve the problem of low connection reliability when two circuit boards are connected by soldering in the prior art.
  • This application provides a battery module, including: a battery unit; a signal acquisition component, the signal acquisition component is electrically connected to the battery unit, and the signal acquisition component includes a first circuit board, a second circuit board and conductive glue; wherein, the first The circuit board has a first conductive area, the second circuit board has a second conductive area, the first conductive area and the second conductive area are arranged along the first direction, and along the first direction, between the first conductive area and the second conductive area Connect by conductive glue.
  • the conductive adhesive includes a plurality of adhesive strips, and adjacent adhesive strips are not in contact; along the first direction, one end of the adhesive strip is connected to the first conductive area, and the other end is connected to the second conductive area.
  • the conductive adhesive is provided with a plurality of notches or through holes; there are adhesive strips between adjacent notches or through holes. Along the first direction, one end of the adhesive strip is connected to the first conductive area, and the other end is connected to the second The conductive areas are connected.
  • the width of the rubber strip is 1 to 3 mm.
  • the conductive adhesive has conductive anisotropy.
  • the first conductive area includes a plurality of first pads
  • the second conductive area includes a plurality of second pads
  • the adhesive strip is connected to the corresponding first pad and the second pad; There is a first gap between the pads, and/or, there is a second gap between adjacent second pads.
  • the adhesive strip covers at least the first pad and/or the second pad.
  • the first circuit board has a row of first pads.
  • the battery module further includes a reinforcing plate, and the reinforcing plate is connected to the second circuit board by an adhesive, and/or the reinforcing plate is provided with mounting holes, and fasteners are arranged in the mounting holes, and the reinforcing plate is connected to the The first circuit board and the second circuit board are fixedly connected by fasteners.
  • FIG. 1 is a schematic diagram of a partial structure of a battery module provided by this application in a specific embodiment
  • Figure 2 is a partial enlarged view of part I in Figure 1;
  • FIG. 3 is a schematic structural diagram of the first circuit board in FIG. 1 in a specific embodiment
  • Figure 4 is a partial enlarged view of part II in Figure 3;
  • FIG. 5 is a schematic structural diagram of the second circuit board in FIG. 1 in a specific embodiment
  • Figure 6 is a partial enlarged view of part III in Figure 5;
  • FIG. 7 is an exploded view of the first circuit board, the second circuit board and the conductive glue in a specific embodiment
  • Figure 8 is a partial enlarged view of part IV in Figure 7 in the first specific embodiment
  • Figure 9 is a partial enlarged view of part IV in Figure 7 in a second specific embodiment
  • Fig. 10 is a partial enlarged view of part IV in Fig. 7 in a third specific embodiment.
  • Figure 1 is a partial structural diagram of the battery module provided by this application in a specific embodiment
  • Figure 2 is a partial enlarged view of part I in Figure 1
  • Figure 3 is Figure 1
  • Fig. 4 is a partial enlarged view of part II in Fig. 3
  • Fig. 5 is a schematic structural diagram of the second circuit board in Fig. 1 in a specific embodiment
  • Fig. 6 is a partial enlarged view of part III in Fig. 5
  • Fig. 7 is an exploded view of the first circuit board, the second circuit board and the conductive adhesive in a specific embodiment
  • Fig. 8 is part IV in Fig. 7 in the first A partial enlarged view in a specific embodiment
  • Figure 9 is a partial enlarged view of part IV in Figure 7 in a second specific embodiment
  • Figure 10 is a partial enlarged view of part IV in Figure 7 in a third specific embodiment Figure.
  • the embodiment of the present application provides a battery module.
  • the battery module includes a plurality of battery cells 6 stacked on each other along the length direction and has two ends along the length direction.
  • the battery module includes two end plates (not shown in the figure). ), along the two sides in the width direction, the battery module includes two side plates (not shown in the figure), and the end plates and the side plates are fixedly connected to form a receiving space for accommodating the battery unit 6.
  • the battery module also includes a signal acquisition component, which includes a first circuit board 1 and a second circuit board 2, wherein the second circuit board 2 may be a flexible circuit board, and the second circuit board 2 includes The base 22 and the multiple collection terminals extending from the base 22 are electrically connected to the poles of the corresponding battery unit 6 through a connecting piece, so as to realize the collection of the voltage, temperature and other signals of each battery unit 6, thereby Provide a basis for the safety performance of the battery module and the safe driving of the vehicle.
  • the first circuit board 1 of the signal acquisition component can be a printed circuit board and is electrically connected to the second circuit board 2, thereby realizing the transmission of sampled data of the battery unit 6.
  • the first circuit board 1 and the battery unit 6 are There is an insulating member 5 between.
  • the first circuit board 1 has a first conductive area 11, and as shown in FIGS. 5 and 6, the second circuit board 2 has a second conductive area 21, and the second circuit
  • the second conductive area 21 of the board 2 extends downward from the top of the battery module and corresponds to the first conductive area 11.
  • the first direction L herein is defined as the arrangement direction of the first conductive region 11 and the second conductive region 21.
  • the second conductive area 21 of the second circuit board 2 extends from the top down to the end of the battery module
  • the first conductive area 11 and the second conductive area 21 are distributed along the length direction L of the battery module, that is, the first direction is the length direction L of the battery module.
  • the first direction L is not necessarily the length direction of the battery module.
  • the first conductive areas 11 and the second conductive areas 21 are distributed along the width direction W
  • the first direction L is the width direction of the battery module; or, when the first circuit board 1 is located in other positions, the distribution direction of the first conductive area 11 and the second conductive area 21 can also be the direction of the battery module Any direction. Therefore, the present application does not limit the distribution direction (first direction L) of the first conductive region 11 and the second conductive region 21.
  • the first direction L is the length direction L of the battery module as an example.
  • the signal acquisition component further includes a conductive adhesive 3, and the conductive adhesive 3 is passed between the first conductive area 11 and the second conductive area 21 along the first direction where the first conductive area 11 and the second conductive area 21 are distributed. Electric connection.
  • the first circuit board 1 and the second circuit board 2 are directly connected through the conductive glue 3.
  • the conductive glue 3 can not only realize the electrical connection between the first circuit board 1 and the circuit board 2, but also realize one of the two
  • the mechanical connection between the first circuit board 1 and the second circuit board 2 eliminates the need for welding connectors to realize the connection between the first circuit board 1 and the second circuit board 2, thereby avoiding the decrease in the reliability of the electrical connection between the two due to poor welding reliability after welding the connector.
  • the connection method of the two circuit boards in the present application has the advantage that the connection takes up less space, and the connector can be omitted, so that the energy density of the battery module can be improved.
  • the conductive adhesive 3 is an anisotropic conductive film (ACF), which is characterized in that the electrical conduction direction perpendicular to the plane of the conductive adhesive 3 and the resistance characteristic of the insulating plane where the conductive adhesive 3 is located have obvious resistance characteristics Difference. When the difference between the two exceeds a certain ratio, it can be said to have good conductive anisotropy. After the first circuit board 1 and the second circuit board 2 are connected by the anisotropic conductive adhesive, the two circuit boards only It can be conducted in the vertical direction of the two, thereby avoiding creepage inside the first circuit board 1 and the second circuit board 2.
  • ACF anisotropic conductive film
  • the metal conductive particles in the conductive adhesive 3 are likely to be broken down, and after the conductive adhesive 3 breaks down, the conductive adhesive 3 Not only can conduct electricity along its thickness direction, but also along its plane.
  • the conductive glue 3 is used to connect the first circuit board 1 and the second circuit board 2, there is a first conductive area 11 and a second conductive area 21 passing through The conductive adhesive 3 has the risk of creeping along its plane.
  • the conductive adhesive 3 includes a plurality of separately arranged adhesive strips 31, which are adjacent to each other. There is no contact between them, and along the first direction L, one end of the rubber strip 31 is connected to the first conductive area 11 and the other end is connected to the second conductive area 21.
  • the conductive adhesive 3 is provided with a plurality of notches 32, and there is a rubber strip 31 between adjacent notches 32.
  • one end of the rubber strip 31 is connected to the first conductive area 11
  • the other end is connected to the second conductive area 21.
  • the conductive adhesive 3 is provided with a plurality of through holes 33, and there are adhesive strips 31 between adjacent through holes 33.
  • one end of the adhesive strip 31 is connected to the first conductive adhesive.
  • the area 11 is connected, and the other end is connected to the second conductive area 21.
  • the electrical gap between adjacent adhesive strips 31 can be increased.
  • the larger electrical gap It is possible to reduce the risk of creeping electricity from between adjacent rubber strips 31, improve the safety of the first circuit board 1 and the second circuit board 2, and prevent leakage currents between two adjacent rubber strips 31.
  • the rubber strips 31 are parallel to each other, and there is a third gap 34 between adjacent rubber strips 31.
  • the third gap 34 is a gap of the gap 32. Width.
  • the third gap 34 is the width of the through hole 33.
  • the third gaps between them are equal everywhere, which can reduce the processing difficulty of the conductive adhesive 3, and can prevent creeping between the adjacent rubber strips 31 At the same time, the space occupied by the conductive adhesive 3 is smaller, thereby increasing the energy density of the battery module.
  • the third gap 34 between adjacent rubber strips 31 should not be too small or too large.
  • the third gap 34 is too small and the battery module voltage is high, the high voltage Under the action, the charged particles in the air in the third gap 34 can be excited, causing the adjacent rubber strips 31 to creep; when the third gap 34 is too large, in order to realize the electrical connection between the first circuit board 1 and the second circuit board 2
  • the conductive glue 31, the first conductive region 11 and the second conductive region 21 have a larger area, thereby reducing the energy density of the battery module.
  • the third gap 34 between adjacent rubber strips 31 is preferably 2-5 mm.
  • the third gap 34 may be 3 mm, 4 mm, or the like.
  • the values of the third gaps 34 can be the same or different, that is, the rubber strips 31 can be evenly distributed or unevenly distributed, as long as the creepage between adjacent rubber strips 31 can be prevented.
  • the rubber strips 31 are evenly distributed, that is, the third gaps 34 between adjacent rubber strips 31 are equal, so that the processing difficulty can be reduced.
  • the width of the rubber strip 31 is 1 to 3 mm.
  • the rubber strip 31 has a rectangular parallelepiped structure.
  • the width of the rubber strip 31 should not be too small or too large.
  • the rubber strip 31 The volume is small, and the area connected to the first conductive area 11 and the second conductive area 21 is small, resulting in a decrease in the reliability of the connection between the conductive adhesive 3 and the first circuit board 1 and the second circuit board 2;
  • the width of 31 is too large, the area of the conductive adhesive 3 is larger, thereby increasing the areas of the first circuit board 1, the second circuit board 2 and the conductive adhesive 3, and reducing the energy density of the battery module.
  • the width of the rubber strip 31 is preferably 1 to 3 mm, such as 2 mm, 2.5 mm, etc.
  • the first conductive area 11 of the first circuit board 1 includes a plurality of first pads 111, and there is no contact between adjacent first pads 111, and /Or, as shown in FIGS. 5 and 6, the second conductive region 21 includes a plurality of second pads 211, and there is no contact between adjacent second pads 211.
  • each adhesive strip 31 is connected to the corresponding first pad 111, and/or each adhesive strip 31 is connected to the corresponding second pad 211, and the first gap 112 and/ Or the second gap 212 corresponds to the third gap 34.
  • Providing a gap between the adjacent first pads 111 and/or the second pads 211 can facilitate the cutting of the conductive adhesive 3 and provide a reference for the conductive adhesive 3 during the cutting process, thereby improving the yield of the conductive adhesive 3.
  • the thickness of the first circuit board 1 is greater than the thickness of the second circuit board 2, and the second circuit board 2 ( The rigidity and hardness of the flexible circuit board are small.
  • a gap is only provided in the first conductive area 11 of the first circuit board 1, and no gap is provided in the second conductive area 21 of the second circuit board 2. That is, the first conductive area 11 includes a plurality of first pads 111, and the adjacent first pads 111 are not in contact. Along the first direction L, each first pad 111 and the second conductive area 21 are connected by the conductive glue 3. As shown in Figure 7 and Figure 8.
  • no gap is provided in the second conductive area 21 of the second circuit board 2 (flexible circuit board), which not only reduces the difficulty of processing the second circuit board 2, but also helps to improve the second circuit board 2.
  • the purpose of preventing short circuit of the circuit board can also be achieved by only providing a gap between the first pads 111 of the first circuit board 1.
  • the conductive adhesive 3 covers at least the first conductive area 11 and the second conductive area 21, that is, the adhesive strip 31 covers at least the first pad 111 and/or the second pad 211, thereby increasing the conductive adhesive 3 and the connection area between the first circuit board 1 and the second circuit board 2 to improve the reliability of the connection between the first circuit board 1 and the second circuit board 2.
  • the first circuit board 1 in the battery module, along the first direction L, the first circuit board 1 has a row of first pads 111.
  • the first circuit board 1 and the second circuit board 2 are electrically connected through a connector, and the first circuit board 1 and the connector are inserted through pins, and in order to reduce the size of the connector ,
  • the connector is provided with two rows of pins.
  • the first circuit board 1 and the second circuit board 2 are connected by conductive glue 3
  • the first circuit board 1 is provided with a row of first pads 111, and the number of the first pads 111 cannot be excessive. Therefore, the distance between adjacent first pads 111 is reduced.
  • the above-mentioned first gap 112 may be provided between adjacent first pads 111.
  • the second conductive area 21 of the second circuit board 2 is provided with a plurality of second pads 211, and there is a second gap 212 between adjacent second pads 211, and the second solder
  • the disk 211 corresponds to the first pad 111 of the first circuit board 1 one-to-one
  • the second gap 212 corresponds to the first gap 112 one-to-one
  • the first pad 111 and the second pad 211 are electrically connected by the conductive glue 3 .
  • the first circuit board 1 has a through hole between adjacent first pads 11, and the through hole forms the above-mentioned first gap 112, or the second In a circuit board 1, a gap is provided between adjacent first pads 11, and the gap forms the aforementioned first gap 112.
  • the battery module also includes a reinforcing plate 4, along the first direction L, the second conductive area 21 of the second circuit board 2 is located inside the first circuit board 1 (close to the battery cell 6), the outer side of the first circuit board 1 (the side away from the battery unit 6) is provided with the reinforcing plate 4, and the reinforcing plate 4 and the second circuit board 2 are connected by an adhesive, specifically, The two are connected by structural glue.
  • the reinforcing plate 4 is provided with one or more mounting holes 41, and the reinforcing plate 4 and the first circuit board 1 are fixedly connected in the mounting holes 41 by fasteners, such as bolt connection.
  • the reinforcing plate 4 can be connected to both the first circuit board 1 and the second circuit board 2, so as to realize the connection between the two circuit boards, so as to improve the reliability of the connection between the two and improve the application.

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

Abstract

一种电池模组，包括：电池单元(6)；信号采集组件，信号采集组件与电池单元(6)电连接，且信号采集组件包括第一电路板(1)、第二电路板(2)和导电胶(3)；其中，第一电路板(1)具有第一导电区(11)，第二电路板(2)具有第二导电区(21)，第一导电区(11)与第二导电区(21)沿第一方向(L)布置，且沿第一方向(L)，第一导电区(11)与第二导电区(21)之间通过导电胶(3)连接。

Description

电池模组
相关申请的交叉引用
本申请要求享有于2019年04月26日提交的名称为“一种电池模组”的中国专利申请201920589829.8的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及储能器件技术领域，尤其涉及一种电池模组。
背景技术
现有的电池模组包括电池单元和信号采集部件，该信号采集部件用于采集电池单元的电压、温度等信号，包括第一电路板和第二电路板，两电路板之间通过连接器电连接，且两电路板与连接器之间焊接相连。但是，电路板表面形成氧化铝薄膜，导致其与连接器之间的焊接可靠性大大降低。
发明内容
有鉴于此，本申请提供了一种电池模组，用以解决现有技术中两电路板通过连接器焊接相连时连接可靠性较低的问题。
本申请提供了一种电池模组，包括：电池单元；信号采集组件，信号采集组件与电池单元电连接，且信号采集组件包括第一电路板、第二电路板和导电胶；其中，第一电路板具有第一导电区，第二电路板具有第二导电区，第一导电区与第二导电区沿第一方向布置，且沿第一方向，第一导电区与第二导电区之间通过导电胶连接。
在一实施例中，导电胶包括多个胶条，相邻胶条之间不接触；沿第一方向，胶条的一端与第一导电区相连，另一端与第二导电区相连。
在一实施例中，导电胶设置有多个缺口或通孔；相邻缺口或通孔之间 具有胶条，沿第一方向，胶条的一端与第一导电区相连，另一端与第二导电区相连。
在一实施例中，相邻胶条之间具有第三间隙，第三间隙为2～5mm。优选地，胶条的宽度为1～3mm。
在一实施例中，导电胶具有导电异方性。
在一实施例中，第一导电区包括多个第一焊盘，第二导电区包括多个第二焊盘，胶条与对应的第一焊盘和第二焊盘相连；相邻第一焊盘之间具有第一间隙，和/或，相邻第二焊盘之间具有第二间隙。
在一实施例中，胶条至少覆盖第一焊盘和/或第二焊盘。
在一实施例中，沿第一方向，第一电路板具有一排第一焊盘。
在一实施例中，电池模组还包括加强板，加强板与第二电路板通过粘结剂相连，和/或，加强板开设有安装孔，安装孔内设有紧固件，加强板与第一电路板、第二电路板通过紧固件固定连接。
附图说明
从下面结合附图对本申请的具体实施方式的描述中可以更好地理解本申请，其中，通过阅读以下参照附图对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显，相同或相似的附图标记表示相同或相似的特征。
图1为本申请所提供电池模组在一种具体实施例中的局部结构示意图；
图2为图1中Ⅰ部分的局部放大图；
图3为图1中第一电路板在一种具体实施例中的结构示意图；
图4为图3中Ⅱ部分的局部放大图；
图5为图1中第二电路板在一种具体实施例中的结构示意图；
图6为图5中Ⅲ部分的局部放大图；
图7为第一电路板、第二电路板与导电胶在一种具体实施例中的爆炸图；
图8为图7中Ⅳ部分在第一种具体实施例中的局部放大图；
图9为图7中Ⅳ部分在第二种具体实施例中的局部放大图；
图10为图7中Ⅳ部分在第三种具体实施例中的局部放大图。
附图标记说明：
1-第一电路板；11-第一导电区；111-第一焊盘；112-第一间隙；
2-第二电路板；21-第二导电区；211-第二焊盘；212-第二间隙；22-基体；
3-导电胶；31-胶条；32-缺口；33-通孔；34-第三间隙；
4-加强板；41-安装孔；5-绝缘件；6-电池单元。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。下面的详细描述中公开了许多具体细节，以便全面理解本申请。但是，对于本领域技术人员来说，很明显的是，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请的更好的理解。本申请决不限于下面所提出的任何具体配置，而是在不脱离本申请的精神的前提下覆盖了元素和部件的任何修改、替换和改进。在附图和下面的描述中，没有示出公知的结构和技术，以便避免对本申请造成不必要的模糊。
请参考附图1～10，其中，图1为本申请所提供电池模组在一种具体实施例中的局部结构示意图；图2为图1中Ⅰ部分的局部放大图；图3为图1中第一电路板在一种具体实施例中的结构示意图；图4为图3中Ⅱ部分的局部放大图；图5为图1中第二电路板在一种具体实施例中的结构示意图；图6为图5中Ⅲ部分的局部放大图；图7为第一电路板、第二电路板与导电胶在一种具体实施例中的爆炸图；图8为图7中Ⅳ部分在第一种具体实施例中的局部放大图；图9为图7中Ⅳ部分在第二种具体实施例中的局部放大图；图10为图7中Ⅳ部分在第三种具体实施例中的局部放大图。
本申请实施例提供一种电池模组，该电池模组包括多个沿长度方向相互堆叠的电池单元6，且沿长度方向的两端，该电池模组包括两端板(图中未示出)，沿宽度方向的两侧，该电池模组包括两侧板(图中未示出)，且该端板和侧板固定连接，从而形成容纳电池单元6的容纳空间。
同时，该电池模组还包括信号采集组件，该信号采集组件包括第一电路板1和第二电路板2，其中，该第二电路板2可为柔性电路板，该第二电路板2包括基体22和从基体22伸出的多个采集端子，各采集端子与对应电池单元6的极柱之间通过连接片电连接，以便实现对各电池单元6的电压、温度等信号的采集，从而为电池模组的安全性能以及车辆的安全行驶提供依据。同时，该信号采集组件的第一电路板1可为印制电路板，并与第二电路板2电连接，从而实现电池单元6采样数据的传输，该第一电路板1与电池单元6之间设置有绝缘件5。
其中，如图3和图4所示，该第一电路板1具有第一导电区11，如图5和图6所示，该第二电路板2具有第二导电区21，且第二电路板2的第二导电区21从电池模组的顶部向下延伸，并与第一导电区11对应，同时，第二电路板2向下延伸后，第二导电区21与第一导电区11沿第一方向L排列。因此，本文中的第一方向L定义为第一导电区11与第二导电区21的排列方向。如图1和图2所示的实施例中，当第一电路板1位于电池模组的端部时，第二电路板2的第二导电区21从顶部向下延伸至电池模组的端部，并与第一导电区11对应，此时，第一导电区11与第二导电区21沿电池模组的长度方向L分布，即第一方向为电池模组的长度方向L。
当然，该第一方向L并非必须为电池模组的长度方向，例如，当第一电路板1位于电池模组的侧部时，第一导电区11与第二导电区21沿宽度方向W分布，此时，第一方向L为电池模组的宽度方向；或者，当第一电路板1位于其他位置时，第一导电区11与第二导电区21的分布方向还可为电池模组的任意方向。因此，本申请对第一导电区11和第二导电区21的分布方向(第一方向L)不作限制。下面各实施例中，以第一方向L为电池模组的长度方向L为例描述。
进一步地，该信号采集组件还包括导电胶3，沿上述第一导电区11和第二导电区21分布的第一方向，该第一导电区11与第二导电区21之间通过导电胶3电连接。
本申请中，第一电路板1和第二电路板2通过导电胶3直接相连，该导电胶3不仅能够实现第一电路板1与电路板2之间的电连接，还能够实 现二者之间的机械连接，使得第一电路板1与第二电路板2之间无需通过焊接连接器实现连接，从而能够避免因焊接连接器后焊接可靠性不高导致的二者电连接可靠性降低，且本申请中的两电路板的连接方式具有连接占用空间较小的优点，并能够省去连接器，从而能够提高电池模组的能量密度。
其中，该导电胶3为异方性导电胶膜(Anisotropic Conductive Film，ACF)，其特点在于：垂直于导电胶3平面的电气导通方向与导电胶3所在的绝缘平面的电阻特性具有明显的差异性，当二者的差异超过一定比值后，即可称为具有良好的导电异方性，通过该异方性导电胶连接第一电路板1与第二电路板2后，两电路板只能沿二者的垂直方向导通，从而避免第一电路板1和第二电路板2内部发生爬电。
当电池模组的电压较高，例如大于500V时，在该高电压的作用下，导电胶3中的金属导电粒子容易存在被击穿的风险，而该导电胶3击穿后，导致导电胶3不仅能够沿其厚度方向导电，还能够沿其平面导电，当该导电胶3用于连接第一电路板1和第二电路板2时，存在第一导电区11与第二导电区21通过导电胶3沿其平面爬电的风险。
为了防止第一电路板1与第二电路板2在高压下发生爬电，如图8所示的实施例中，该导电胶3包括多个分体设置的胶条31，相邻31胶条之间不接触，且沿第一方向L，胶条31的一端与第一导电区11相连，另一端与第二导电区21相连。
如图9所示的实施例中，该导电胶3设置有多个缺口32，且相邻缺口32之间具有胶条31，沿第一方向L，胶条31的一端与第一导电区11相连，另一端与第二导电区21相连。
如图10所示的实施例中，该导电胶3设置有多个通孔33，且相邻通孔33之间具有胶条31，沿第一方向L，胶条31的一端与第一导电区11相连，另一端与第二导电区21相连。
因此，本申请中，通过将导电胶3设置为包括多个胶条31的结构，能够提高相邻胶条31之间的电气间隙，当电池模组电压较高时，该较大的电气间隙能够降低从相邻胶条31之间爬电的风险，提高第一电路板1和第二 电路板2的安全性，并能够防止相邻两胶条31之间形成漏电流。
如图8所示的实施例中，各胶条31相互平行，且相邻胶条31之间具有第三间隙34，在图9所示的实施例中，该第三间隙34为缺口32的宽度，在图10所示的实施例中，该第三间隙34为通孔33的宽度。
本实施例中，当相邻胶条31相互平行时，二者之间各处的第三间隙相等，能够降低导电胶3的加工难度，且能够在实现防止相邻胶条31之间爬电的同时，使得该导电胶3所占据的空间较小，从而提高电池模组的能量密度。
其中，该导电胶3中，相邻胶条31之间的第三间隙34不宜过小，也不宜过大，当该第三间隙34过小、电池模组电压较高时，在该高电压作用下，能够激发第三间隙34内空气中的带电粒子，导致相邻胶条31爬电；当该第三间隙34过大时，为了实现第一电路板1与第二电路板2的电连接，该导电胶31、第一导电区11和第二导电区21的面积较大，从而降低电池模组的能量密度。
因此，本实施例中，相邻胶条31之间的第三间隙34优选为2～5mm，例如，该第三间隙34可为3mm、4mm等。且本实施例中，各第三间隙34的数值可相同，也可不同，即各胶条31可均匀分布，也可不均匀分布，只要能够防止相邻胶条31之间发生爬电即可。图8～10所示的实施例中，各胶条31均匀分布，即相邻胶条31之间的第三间隙34相等，从而能够降低加工难度。
同时，如图8～10所示，胶条31的宽度为1～3mm。
本实施例中，该胶条31为长方体结构，沿电池模组的宽度方向W，该胶条31的宽度不应过小也不应过大，当胶条31的宽度过小时，胶条31的体积较小，与第一导电区11和第二导电区21连接的面积较小，导致导电胶3与第一电路板1、第二电路板2之间的连接可靠性降低；当胶条31的宽度过大时，该导电胶3的面积较大，从而增大第一电路板1、第二电路板2和导电胶3的面积，减小电池模组的能量密度。
因此，本实施例中，胶条31的宽度优选为1～3mm，例如2mm，2.5mm等。
以上各实施例中，如图3和图4所示，该第一电路板1的第一导电区11包括多个第一焊盘111，且相邻第一焊盘111之间不接触，和/或，如图5和图6所示，该第二导电区21包括多个第二焊盘211，相邻第二焊盘211之间不接触。
当各第一焊盘111相互平行时，相邻第一焊盘111之间具有第一间隙112，相应地，当各第二焊盘211相互平行时，相邻第二焊盘211之间具有第二间隙212，沿第一方向L，各胶条31与对应的第一焊盘111相连，和/或，各胶条31与对应的第二焊盘211相连，且第一间隙112和/或第二间隙212与第三间隙34对应。
本实施例中，加工时，首先将第一导电区11和第二导电区21粘贴于导电胶3的两侧，然后切割该导电胶3，以形成上述胶条31，本实施例中，通过在相邻第一焊盘111和/或第二焊盘211之间设置间隙，能够便于导电胶3的切割，在切割过程中可为导电胶3提供参照，从而提高导电胶3的成品率。
具体地，由于第一电路板1为印制电路板，第二电路板2为柔性电路板，因此，第一电路板1的厚度大于第二电路板2的厚度，且第二电路板2(柔性电路板)的刚度和硬度较小。本实施例中，仅在第一电路板1的第一导电区11设置间隙，第二电路板2的第二导电区21不设置间隙。即第一导电区11包括多个第一焊盘111，且相邻第一焊盘111不接触，沿第一方向L，各第一焊盘111与第二导电区21通过导电胶3连接，如图7和图8所示。
因此，本实施例中，在第二电路板2(柔性电路板)的第二导电区21不设置间隙，不仅能够降低第二电路板2的加工难度，还有助于提高第二电路板2的完整性，且仅在第一电路板1的第一焊盘111之间设置间隙也能够实现防止电路板短路的目的。
同时，以上各实施例中，导电胶3至少覆盖第一导电区11和第二导电区21，即胶条31至少覆盖第一焊盘111和/或第二焊盘211，从而增大导电胶3与第一电路板1和第二电路板2之间的连接面积，以提高第一电路板1与第二电路板2之间的连接可靠性。
另一方面，如图1和图2所示，该电池模组中，沿第一方向L，第一电路板1具有一排第一焊盘111。
现有技术中，第一电路板1与第二电路板2之间通过连接器电连接，且该第一电路板1与连接器之间通过插针插接，且为了减小连接器的尺寸，该连接器设置有两排插针。本实施例中，当第一电路板1与第二电路板2之间通过导电胶3连接时，第一电路板1设置有一排第一焊盘111，该第一焊盘111的数量不能过少，因此，相邻第一焊盘111之间的距离减小，为了防止相邻第一焊盘111短路，可通过在相邻第一焊盘111之间设置上述第一间隙112。
在另一种具体实施例中，第二电路板2的第二导电区21设置有多个第二焊盘211，相邻第二焊盘211之间具有第二间隙212，且该第二焊盘211与第一电路板1的第一焊盘111一一对应，第二间隙212与第一间隙112一一对应，第一焊盘111与第二焊盘211之间通过导电胶3电连接。
具体地，与导电胶3类似，如图4所示，该第一电路板1中，相邻第一焊盘11之间具有通孔，该通孔形成上述第一间隙112，或者，该第一电路板1中，相邻第一焊盘11之间设置有缺口，该缺口形成上述第一间隙112。
或者，如图5和图6所示，该第二电路板2中，相邻第二焊盘211之间具有通孔，该通孔形成上述第二间隙212，或者，该第二电路板2中，相邻第二焊盘21之间设置有缺口，该缺口形成上述第二间隙212。
另外，如图1和图2所示，该电池模组还包括加强板4，沿第一方向L，第二电路板2的第二导电区21位于第一电路板1的内侧(靠近电池单元6的一侧)，该第一电路板1的外侧(远离电池单元6的一侧)设置有该加强板4，且该加强板4与第二电路板2通过粘结剂相连，具体地，二者通过结构胶相连。同时，该加强板4开设有一个或多个安装孔41，该加强板4与第一电路板1在该安装孔41内通过紧固件固定连接，例如螺栓连接。
本实施例中，该加强板4能够与第一电路板1和第二电路板2均连接，从而能够实现两电路板之间的连接，以便提高二者之间的连接可靠性，提高本申请中两电路板通过导电胶3连接后的强度和可靠性。
本领域技术人员应能理解，上述实施例均是示例性而非限制性的。在不同实施例中出现的不同技术特征可以进行组合，以取得有益效果。本领域技术人员在研究附图、说明书及权利要求书的基础上，应能理解并实现所揭示的实施例的其他变化的实施例。在权利要求书中，术语“包括”并不排除其他装置或步骤；物品没有使用数量词修饰时旨在包括一个/种或多个/种物品，并可以与“一个/种或多个/种物品”互换使用”；术语“第一”、“第二”用于标示名称而非用于表示任何特定的顺序。权利要求中的任何附图标记均不应被理解为对保护范围的限制。权利要求中出现的多个部分的功能可以由一个单独的硬件或软件模块来实现。某些技术特征出现在不同的从属权利要求中并不意味着不能将这些技术特征进行组合以取得有益效果。

Claims (10)

  1. 一种电池模组，包括：
    电池单元；
    信号采集组件，所述信号采集组件与所述电池单元电连接，且所述信号采集组件包括第一电路板、第二电路板和导电胶；
    其中，所述第一电路板具有第一导电区，所述第二电路板具有第二导电区，所述第一导电区与所述第二导电区沿第一方向布置，且沿所述第一方向，所述第一导电区与所述第二导电区之间通过所述导电胶连接。
  2. 根据权利要求1所述的电池模组，其中，所述导电胶包括多个胶条，相邻所述胶条之间不接触；沿所述第一方向，所述胶条的一端与所述第一导电区相连，另一端与所述第二导电区相连。
  3. 根据权利要求1所述的电池模组，其中，所述导电胶设置有多个缺口或通孔；相邻所述缺口或所述通孔之间具有胶条，沿所述第一方向，所述胶条的一端与所述第一导电区相连，另一端与所述第二导电区相连。
  4. 根据权利要求2或3所述的电池模组，其中，相邻所述胶条之间具有第三间隙，所述第三间隙为2～5mm。
  5. 根据权利要求2或3所述的电池模组，其中，所述胶条的宽度为1～3mm。
  6. 根据权利要求1～5任一项所述的电池模组，其中，所述导电胶具有导电异方性。
  7. 根据权利要求2至6任一项所述的电池模组，其中，所述第一导电区包括多个第一焊盘，所述第二导电区包括多个第二焊盘，所述胶条与对应的所述第一焊盘和所述第二焊盘相连；
    相邻所述第一焊盘之间具有第一间隙，和/或，相邻所述第二焊盘之间具有第二间隙。
  8. 根据权利要求7所述的电池模组，其中，所述胶条至少覆盖所述第一焊盘和/或所述第二焊盘。
  9. 根据权利要求7或8所述的电池模组，其中，沿所述第一方向，所述第一电路板具有一排所述第一焊盘。
  10. 根据权利要求1～9任一项所述的电池模组，其中，所述电池模组还包括加强板，所述加强板与所述第二电路板通过粘结剂相连，和/或，所述加强板开设有安装孔，所述安装孔内设有紧固件，所述加强板与所述第一电路板、所述第二电路板通过紧固件固定连接。
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