WO2020211618A1 - 电池包 - Google Patents

电池包 Download PDF

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Publication number
WO2020211618A1
WO2020211618A1 PCT/CN2020/081741 CN2020081741W WO2020211618A1 WO 2020211618 A1 WO2020211618 A1 WO 2020211618A1 CN 2020081741 W CN2020081741 W CN 2020081741W WO 2020211618 A1 WO2020211618 A1 WO 2020211618A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible electrical
fixing
battery pack
electrical connection
connection member
Prior art date
Application number
PCT/CN2020/081741
Other languages
English (en)
French (fr)
Inventor
王旭
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
Priority to EP20790693.4A priority Critical patent/EP3933957B8/en
Publication of WO2020211618A1 publication Critical patent/WO2020211618A1/zh
Priority to US17/504,487 priority patent/US11677122B2/en

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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
    • H01M50/588—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/543—Terminals
    • 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
    • H01M50/591—Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 pack.
  • the structure of the battery pack is complex, and the flexibility of flexible electrical connectors needs to be used to adapt to different application scenarios and requirements.
  • the present application provides a battery pack to solve the problem of easy deformation of the existing flexible electrical connector.
  • This application provides a battery pack, including:
  • each battery module includes a plurality of electrically connected single cells, and each battery module is provided with an output pole at the connection along the height direction (Z) and the length direction (X);
  • the flexible electrical connector is electrically connected to the output electrode, and the flexible electrical connector is arranged at the end of the battery module along the length direction (X);
  • the fixing member is arranged on the outside of the flexible electrical connector to fix the flexible electrical connector on the battery module.
  • the fixing member is provided on the outside of the flexible electrical connection member in the first height direction (Z1) and the output pole in the length direction (X).
  • the fixing member includes a first fixing portion, the first fixing portion has a cavity, and the cavity can accommodate a part of the flexible electrical connection member.
  • the first fixing part is provided with a hook
  • the battery module is fixed by a cable tie, and the hook is plugged and connected with the cable tie;
  • the end of the battery module along the length direction (X) is provided with an end plate, and the hook is plugged and connected with the end plate.
  • the first fixing portion has a first hooking portion and a second hooking portion, and the first hooking portion is engaged with the second hooking portion.
  • the fixing member further includes a second fixing part connected to the first fixing part;
  • the second fixing part is provided with a first baffle at the bottom of both sides in the width direction (Y), and the first baffle is provided on the outer side of the output pole in the width direction (Y).
  • the ends of the two first baffles along the length direction (X) are connected with second baffles;
  • the first baffle and the second baffle enclose an accommodating cavity, and the accommodating cavity is arranged above the output pole along the length direction (X).
  • the fixing member further includes a third fixing portion, which is connected to the first fixing portion and the second fixing portion respectively;
  • the third fixing part is provided on the outside of the end of the flexible electrical connector in the first height direction (Z1) and the end of the output pole in the length direction (X).
  • the third fixing portion has a curved portion, or
  • the third fixing part has a straight face and a curved face.
  • the first fixing part, the second fixing part and the third fixing part are integrally injection molded.
  • the present application provides a vehicle including the above-mentioned battery pack.
  • a fixing member is provided on the outside of the flexible electrical connection member, so that the fixing member fixes the flexible electrical connection member on the battery module, thereby realizing reliable fixing of the flexible electrical connection member and limiting the deformation of the flexible electrical connection member, thereby The problems of easy deformation of the existing flexible electrical connector and insulation failure caused by deformation are solved.
  • FIG. 1 is a schematic structural diagram of a battery module provided in Embodiment 1 of the application;
  • Figure 2 is an enlarged schematic diagram of A in Figure 1;
  • FIG. 3 is a schematic diagram of the structure of the fixing member, the flexible electrical connection member, the output pole and the output pole seat in FIG. 2;
  • Fig. 4 is a schematic structural diagram of the fixing member in Fig. 3;
  • Fig. 5 is an enlarged schematic diagram of B in Fig. 4;
  • Figure 6 is a schematic structural view of the expanded state of Figure 4.
  • FIG. 7 is a schematic structural diagram of a fixing member provided in Embodiment 2 of the present application.
  • FIG. 8 is a schematic structural diagram of a fixing member provided in Embodiment 3 of the present application.
  • FIG. 9 is a schematic structural diagram of a fixing member provided in Embodiment 4 of the present application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated
  • the term “multiple” refers to two or more; the terms “connected”, “fixed”, etc. should be understood in a broad sense.
  • “connected” can be a fixed connection, a detachable connection, or an integral Connection, or electrical connection; it can be directly connected or indirectly connected through an intermediate medium.
  • connection can be a fixed connection, a detachable connection, or an integral Connection, or electrical connection; it can be directly connected or indirectly connected through an intermediate medium.
  • the battery pack includes a plurality of battery modules 1 stacked in the width direction (Y), and each battery module 1 includes a plurality of single cells 11 stacked in the length direction (X) direction.
  • the multiple unit batteries 11 in 1 are electrically connected to each other, that is, multiple unit batteries 11 are connected in parallel and/or in series to form the battery module 1.
  • Each single battery 11 is provided with two poles 111 with opposite polarities.
  • an output pole positive pole and an output pole are formed in each battery module 1
  • the negative pole, and the output pole 12 are respectively electrically connected to the output positive pole and the output negative pole ( Figures 1 and 2 only show the case where one output pole 12 is connected to the output positive pole or (or connected to the output negative pole)) to realize each Each single battery 11 is electrically connected to an external device.
  • FIG. 2 is an enlarged schematic diagram of A in FIG. 1.
  • the above-mentioned battery pack also includes a flexible electrical connector 2, which is electrically connected to the output electrode 12.
  • the flexible electrical connector 2 can be electrically connected to the output electrode 12, for example, by ultrasonic welding, or by fixing the ends of the two through screws or bolts, etc.
  • the electrical energy of the single battery 11 is transmitted through the flexible electrical connector 2.
  • the flexible electrical connector 2 may be a flexible circuit board or a flexible wire harness, which is not limited in this application, as long as it can transmit the electric energy of each single battery 11.
  • the flexible electrical connector 2 is provided at the end of the battery module 1 along the length direction (X), and the output pole 12 is provided at the junction of the battery module 1 along the height direction (Z) and along the length direction (X).
  • a fixing member 3 is provided on the outside of the connector 2 to fix the flexible electrical connector 2 on the battery module 1, thereby realizing the reliable fixing of the flexible electrical connector 2, restricting the deformation of the flexible electrical connector 2, and reducing Risk of short circuit.
  • the fixing member 3 is provided on the outside of the flexible electrical connection member 2 along the first height direction (Z1) and the outside of the output pole 12 along the length direction (X) (the first height direction is 2 and 3 shown in the upward-pointing direction), this prevents the flexible electrical connector 2 and the output pole 12 from being affected by external forces and causing them to contact other conductors, which is beneficial to improve the safety of electrical performance.
  • “outside” can be understood as the inner wall of the fixing member 3 is in contact with or not in contact with the outer surface of the flexible electrical connection member 2 and the output pole 12, that is, as long as it can serve to limit the flexible electrical connection member 2 and the output pole 12 to the fixing member The inside of 3 is fine.
  • the fixing member 3 is made of insulating polymer material, wherein the insulating polymer material is preferably PP (polypropylene, polypropylene), PET (Polyethyleneterephthalate, polyester resin) or ABS (acrylonitrile, butadiene, benzene Ethylene terpolymer of three monomers) and other materials.
  • PP polypropylene, polypropylene
  • PET Polyethyleneterephthalate, polyester resin
  • ABS acrylonitrile, butadiene, benzene Ethylene terpolymer of three monomers
  • each battery module 1 along the length direction (X) is respectively provided with an end plate 13, and a cable tie (not shown in the figure) is wrapped around the battery module 1 and the cable tie is configured to One or more battery modules 1 are bundled.
  • a slot for accommodating the cable tie may be provided on the end plate 13.
  • the fixing member 3 is provided with a hook 311, and the hook 311 is configured to be plugged and connected with a cable tie, so that the fixing member 3 is fixed on the end of the battery module 1 along the length direction (X).
  • the fixing member 3 can also be matedly connected with the end plate 13, for example, a plug-in position that can be inserted into the hook 311 is provided on the end plate 13.
  • FIG. 4 is a schematic structural diagram of the fixing member 3 provided in the first embodiment of the application.
  • the fixing member 3 includes a first fixing portion 31.
  • the first fixing portion 31 has a cavity 30 capable of accommodating a part of the flexible electrical connection piece 2, thus realizing the fixing and limiting of the flexible electrical connection piece 2 so as not to Will be deformed by external forces.
  • the cavity 30 of the present application plays a role of covering the flexible electrical connector 2. It can be understood that the cavity 30 can also be a semi-enclosed structure, so that the end of the flexible electrical connector 2 in the height direction (Z) The part is fixed on the battery module 1.
  • the hook 311 is provided on the first fixing part 31, optionally arranged in the direction of the first fixing part 31 facing the cable tie, so that when the first fixing part 31 is enclosed into a cavity 30 from the unfolded state, it can be more convenient
  • the buckle 311 is mated with the cable tie.
  • the first fixing portion 31 includes two side plates 314, a front plate 315 and a rear plate 316, wherein the hook 311 is provided on the front plate 315.
  • the cavity 30 has opening and closing positions, and the cavity 30 can be opened or closed by the opening and closing positions.
  • the opening and closing position of the cavity 30 is provided on one of the side plates 314.
  • the side plate 314 includes a first hooking portion 312 and a second hooking portion 313. After the first hooking portion 312 and the second hooking portion 313 are clamped, the first fixing portion 31 is enclosed into a cavity 30.
  • the first hooking portion 312 and the second hooking portion 313 provided in the present application are both hook-shaped structures, so that it is more convenient for the first hooking portion 312 and the second hooking portion 313 to be engaged (the expansion of the first fixing portion 1
  • the status can be seen in Figure 6).
  • the first hooking portion 312 and the second hooking portion 313 may also be other clamping structures, for example, a structure in which a groove and a protrusion cooperate, which is not specifically limited in this application.
  • the number of the above-mentioned card connection structures is not limited to one, and can also be two, which is not specifically limited in this application.
  • the fixing member 3 further includes a second fixing portion 32 connected to the first fixing portion 31.
  • the second fixing portion 32 is provided with a first baffle 321 along the bottom of both sides in the width direction (Y). Abutting on the output pole seat 121 of the single battery 11 (see FIG. 3), the first baffle 321 is provided on the outer side of the output pole 12 in the width direction (Y), so that it can be matched with the output pole seat 121 To achieve isolation protection of the output pole 12.
  • the fixing member 3 since the fixing member 3 is made of insulating material, it can prevent the fixing member 3 from being deformed by force, causing the output electrode 12 to contact other conductors due to the exposure of the output electrode 12, and it also greatly improves the output electrode 12 and The creepage distance of other electrical conductors is in turn beneficial to improve the electrical safety of the output pole 12.
  • FIG. 9 The ends of the two first baffles 321 along the length direction (X) are connected with a second baffle 322, and the first baffle 321 and the second baffle 322 enclose a receiving cavity 323.
  • the accommodating cavity 323 is provided above the output pole 12 along the length direction (X), and the accommodating cavity 323 is better to insulate and protect the output pole 12 than to provide the first baffle 321 on both sides of the width direction (Y). Therefore, it is possible to prevent the output pole 12 from contacting with other conductors or the insulation failure of the output pole 12 due to insufficient electrical clearance.
  • the fixing member 3 further includes a third fixing portion 33 which is connected to the first fixing portion 31 and the second fixing portion 32 respectively.
  • the third fixing portion 33 is provided on the flexible electrical connection member 2 along the first height.
  • the outside of the end in the direction (Z1) and the outside of the end of the output pole 12 in the length direction (X) (that is, the outside of the joint between the two). Due to the limitation of safety conditions, the flexible electrical connector 2 cannot have an insulator for isolation between the end faces of the connection and mating location of the output pole 12, so the flexible electrical connector 2 itself has a larger area of conductor exposed around the connection and mating location.
  • the protection of the fixing part 33 to the connection and mating part can effectively isolate the risk of contact between the position and other conductors.
  • the third fixing portion 33 in FIGS. 7 and 9 only has a curved portion 331, while the third fixing portion 33 in FIGS. 6 and 8 has a curved portion 331 and a straight portion 332.
  • the structure can be designed according to different applications. Due to space constraints, usually the top of the output pole 12 is a rigid electrical conductor, and the flexible electrical connector 2 is easily in contact with it or even wears out, resulting in insulation failure. In this application, the third fixing part 33 is provided for insulation and isolation to further improve flexibility. The electrical connection reliability of the electrical connector 2.
  • the above-mentioned curved portion 331 includes a plurality of creases 331a, and the curved portion 331 with different curvatures can be formed by arranging a plurality of creases 331a, or the third fixing portion 33 with different lengths can be formed by providing a plurality of creases 331a, thereby Suitable for different applications.
  • the design lengths of the straight face 332 in FIGS. 6 and 8 are also different (the straight face 332 in FIG. 8 is longer than the straight face 332 in FIG. 6), so that the third fixing part 33 can be adapted to different applications. Design requirements.
  • the fixing member 3 provided in the above embodiment of the present application is an integral injection molding structure, which can increase the processing efficiency of the fixing member 3 and reduce the processing cost of the fixing member 3.
  • the third fixing portion 33 of the present application may not have multiple creases 331a.
  • the fixing member 3 formed by integral injection molding has a bendable third fixing portion 33, that is, the integral The third fixing portion 33 of the injection molded fixing member 3 has flexibility.
  • the fixing member 3 provided in the present application has the fixed flexible electrical connection member 2 and has the function of insulating and isolating. At the same time, it also has the function of protecting the output electrode 12 from insulating and isolating.
  • the functions of deforming the electrical connector 2 and protecting the output pole 12 are integrated, which reduces the number of parts, improves assembly efficiency, and greatly reduces costs.

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

Abstract

本申请涉及储能器件技术领域，尤其涉及一种电池包。所述电池包包括：多个电池模组，每个所述电池模组均包括多个电连接的单体电池，每个所述电池模组沿高度方向(Z)和沿长度方向(X)的连接处均设有输出极；柔性电连接件，与所述输出极电连接，所述柔性电连接件设于所述电池模组沿长度方向(X)的端部；固定件，设于所述柔性电连接件的外部，以将所述柔性电连接件固定于所述电池模组上。本申请通过在柔性电连接件的外部设置固定件，使固定件将柔性电连接件固定于电池模组上，实现了对柔性电连接件的可靠固定，限制了柔性电连接件的变形，从而解决了现有柔性电连接件易变形的问题。

Description

电池包
相关申请的交叉引用
本申请要求享有于2019年04月19日提交的名称为“电池包”的中国专利申请第201920536836.1号的优先权，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，尤其涉及一种电池包。
背景技术
随着动力电池能量密度的不断提高，同时面对不同客户需求多样性，电池包内结构复杂，需要利用柔性电连接件的灵活性适应不同应用场景和需求。
但是由于柔性电连接件的刚性较差，其在受到振动或其他外力作用时很难保持原有设计形状，即可能因受力变形而与其它零部件产生干涉并导致短路的严重后果，甚至会对与之配合的对手件造成不可逆的破坏，从而导致连接失效。
基于以上需求和异常情形，亟待需要设计一种新型电池模组来解决上述问题。
申请内容
本申请提供了一种电池包，以解决现有柔性电连接件易变形的问题。
本申请提供了一种电池包，包括：
多个电池模组，每个电池模组均包括多个电连接的单体电池，每个电池模组沿高度方向(Z)和沿长度方向(X)的连接处均设有输出极；
柔性电连接件，与输出极电连接，柔性电连接件设于电池模组沿长度 方向(X)的端部；
固定件，设于柔性电连接件的外部，以将柔性电连接件固定于电池模组上。
根据本申请的一个方面，固定件设于柔性电连接件沿第一高度方向(Z1)的外部以及输出极沿长度方向(X)的外部。
根据本申请的一个方面，固定件包括第一固定部，第一固定部具有空腔，空腔能够容纳部分柔性电连接件。
根据本申请的一个方面，第一固定部设有卡勾；
电池模组通过扎带固定，卡勾与扎带插接连接；或
电池模组沿长度方向(X)的端部设有端板，卡勾与端板插接连接。
根据本申请的一个方面，第一固定部具有第一勾合部和第二勾合部，第一勾合部与第二勾合部卡接。
根据本申请的一个方面，固定件还包括与第一固定部连接的第二固定部；
第二固定部沿宽度方向(Y)两侧的下方分设有第一挡板，第一挡板设于输出极沿宽度方向(Y)的外侧。
根据本申请的一个方面，两个第一挡板沿长度方向(X)的端部连接有第二挡板；
第一挡板和第二挡板围成一收容腔，收容腔设于输出极沿长度方向(X)的上方。
根据本申请的一个方面，固定件还包括第三固定部，第三固定部分别与第一固定部和第二固定部连接；
第三固定部设于柔性电连接件沿第一高度方向(Z1)的端部的外部以及输出极沿长度方向(X)的端部的外部。
根据本申请的一个方面，第三固定部具有曲面部，或
第三固定部具有直面部和曲面部。
根据本申请的一个方面，第一固定部、第二固定部和第三固定部一体注塑成型。
另一方面，本申请提供了一种车辆，包括上述的电池包。
有益效果：
本申请通过在柔性电连接件的外部设置固定件，使固定件将柔性电连接件固定于电池模组上，实现了对柔性电连接件的可靠固定，限制了柔性电连接件的变形，从而解决了现有柔性电连接件易变形和由变形导致的绝缘失效等问题。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1为本申请实施例一提供的电池模组的结构示意图；
图2为图1中A处的放大示意图；
图3为图2中固定件、柔性电连接件、输出极和输出极座的结构示意图；
图4是图3中固定件的结构示意图；
图5是图4中B处的放大示意图；
图6是图4展开状态的结构示意图；
图7是本申请实施例二提供的固定件的结构示意图；
图8是本申请实施例三提供的固定件的结构示意图；
图9是本申请实施例四提供的固定件的结构示意图。
附图标记：
1-电池模组；
11-单体电池；
111-极柱；
12-输出极；
121-输出极底座；
13-端板；
2-柔性电连接件；
3-固定件；
30-空腔；
31-第一固定部；
311-卡勾；
312-第一勾合部；
313-第二勾合部；
314-侧板；
315-前板；
316-后板；
32-第二固定部；
321-第一挡板；
322-第二挡板；
323-收容腔；
33-连接部；
331-曲面部；
331a-折痕；
332-直面部。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
在本申请的描述中，除非另有明确的规定和限定，术语“第一”、“第二”仅用于描述的目的，而不能理解为指示或暗示相对重要性；除非另有规定或说明，术语“多个”是指两个或两个以上；术语“连接”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接，或电连接；可以是直接相连，也可以通过中 间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
本说明书的描述中，需要理解的是，本申请实施例所描述的“上”、“下”等方位词是以附图所示的角度来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。
如图1所示，其为本申请实施例一提供的一种电池包，电池包可以作为电动装置(例如电动汽车)的电源使用。该电池包包括多个沿宽度方向(Y)层叠堆放的电池模组1，每个电池模组1均包括多个沿长度方向(X)方向叠堆放的单体电池11，在同一电池模组1中的多个单体电池11相互电连接，即多个单体电池11并联和/或串联以形成电池模组1。每个单体电池11均设有两个极性相反的极柱111，多个单体电池11并联和/或串联后，在每个电池模组1中形成一个输出极正极柱和一个输出极负极柱，输出极12分别与输出正极柱和输出负极柱电连接(图1和图2仅示出一个输出极12与输出正极柱或(或与输出负极柱连接)的情况)，以实现每个单体电池11均与外部设备电连接。
请参阅图2，其为图1中A处的放大示意图。上述电池包还包括柔性电连接件2，柔性电连接件2与输出极12电连接，例如可以是通过超声波焊接，还可以是通过螺钉或螺栓将二者的端部固定连接等，以将各单体电池11的电能通过柔性电连接件2进行输送。柔性电连接件2可以是柔性电路板，还可以是柔性线束，在此本申请不对其进行限定，只要能起到传输各单体电池11的电能即可。柔性电连接件2设于电池模组1沿长度方向(X)的端部，输出极12设于电池模组1沿高度方向(Z)和沿长度方向(X)的连接处，在柔性电连接件2的外部设置固定件3，以将柔性电连接件2固定于电池模组1上，从而实现了对柔性电连接件2的可靠固定，限制了柔性电连接件2的变形，降低了短路的风险。
进一步地，请参阅图2和图3，固定件3设于柔性电连接件2沿第一 高度方向(Z1)的外部以及输出极12沿长度方向(X)的外部(第一高度方向即为图2和图3所示的向上指向的方向)，如此防止了柔性电连接件2和输出极12可能受外力影响而导致二者与其它导电体接触，有利于提高电性能安全性。其中，“外部”可以理解为固定件3的内壁与柔性电连接件2和输出极12的外表面接触或未接触，即只要能起到将柔性电连接件2和输出极12限定在固定件3的内侧即可。
具体地，固定件3由包括绝缘高分子材料制成，其中，绝缘高分子材料优选为PP(polypropylene、聚丙烯)、PET(Polyethyleneterephthalate，涤纶树脂)或ABS(是丙烯腈、丁二烯、苯乙烯三种单体的三元共聚物)等材料。这是因为柔性电连接件2的外部套设有热缩管，热缩管通常采用PVC(Polyvinylchloride，聚氯乙烯)材料制成，上述三种绝缘材料的耐磨性能比PVC的耐磨性能好，如此有利于防止柔性电连接件2与其它导电体产生磨损而导致绝缘失效。
进一步地，每个电池模组1沿长度方向(X)的端部分别设有端板13，电池模组1的周身上缠绕有扎带(图中未示出)，扎带被配置为将一个或多个电池模组1进行捆扎，为增加捆扎效果，可以在端板13上设置收容扎带的卡槽。具体地，固定件3设有卡勾311，卡勾311被配置为与扎带插接连接，如此将固定件3固设于电池模组1沿长度方向(X)的端部上。相比于常规的焊接方式，本申请利用卡勾311插接于扎带的方式更加方便，且卡勾311的设计结构也更为简单。可以理解的是，固定件3还可以与端板13配合连接，例如在端板13上设置能够供卡勾311插接的插接位。
进一步地，请参阅图4，其为本申请实施例一提供的固定件3的结构示意图。固定件3包括第一固定部31，第一固定部31具有空腔30，空腔30能够容纳部分柔性电连接件2，如此实现了对柔性电连接件2的固定和限位，使其不会受外力而发生变形。本申请的空腔30对柔性电连接件2起到包覆的作用，可以理解的是，空腔30也可以为半包围的结构，如此将柔性电连接件2沿高度方向(Z)的端部固定于电池模组1上。此外，卡勾311设于第一固定部31上，可选的设于第一固定部31朝向扎带的方 向，如此当第一固定部31由展开状态围成空腔30后，可以更方便卡扣311与扎带的插接配合。
进一步地，第一固定部31包括两个侧板314、一个前板315和一个后板316，其中卡勾311设于前板315上。空腔30具有开合处，可以由开合处打开或关闭空腔30。空腔30的开合处设于其中一个侧板314上。请参阅图5，侧板314包括第一勾合部312和第二勾合部313，第一勾合部312与第二勾合部313卡接后，使第一固定部31围成空腔30。本申请提供的第一勾合部312和第二勾合部313均为勾状结构，如此更加方便第一勾合部312和第二勾合部313的卡接(第一固定部1的展开状态可参见图6)。可以理解的是，第一勾合部312和第二勾合部313也可以是其它卡接结构，例如可以是凹槽与凸起配合的结构，对此本申请不进行具体限定。同时，上述卡接结构数量也不限于一个，也可以是两个，对此本申请不进行具体限定。
进一步地，固定件3还包括与第一固定部31连接的第二固定部32，第二固定部32沿宽度方向(Y)两侧的下方分设有第一挡板321，第一挡板321抵接于单体电池11的输出极座121上(可参阅图3)，第一挡板321设于输出极12沿宽度方向(Y)的外侧，如此可通过与输出极座121的位置配合实现对输出极12的隔离保护。此外，由于固定件3采用绝缘材料制成，如此可防止固定件3在受力变形时，因露出输出极12而导致输出极12与其它导电体接触，同时也极大提高了输出极12与其它导电体的爬电距离，进而有利于提高输出极12的电性能安全性。
另一实施例，请参阅图9，两个第一挡板321沿长度方向(X)的端部连接有第二挡板322，第一挡板321和第二挡板322围成一收容腔323，收容腔323设于输出极12沿长度方向(X)的上方，设置该收容腔323相比仅在宽度方向(Y)两侧设置第一挡板321更能对输出极12进行绝缘保护，从而避免输出极12与其它导电体接触或因电气间隙不足等原因而导致输出极12的绝缘失效等故障。
进一步地，固定件3还包括第三固定部33，第三固定部33分别与第一固定部31和第二固定部32连接，第三固定部33设于柔性电连接件2沿 第一高度方向(Z1)的端部的外部以及输出极12沿长度方向(X)的端部的外部(即二者连接配合处的外部)。由于安全条件限制，柔性电连接件2在与输出极12连接配合处的端面间不能有绝缘体进行隔离，故柔性电连接件2本身在连接配合处的四周露出导电体面积较大，通过第三固定部33对连接配合处的保护可有效隔绝该位置与其它导电体产生接触的风险。
具体地，图7和图9中的第三固定部33仅具有曲面部331，而图6和图8中的第三固定部33具有曲面部331和直面部332，第三固定部33的具体结构可根据不同应用场合进行设计。由于空间限制，通常输出极12的上方为刚性导电体，柔性电连接件2极易与其产生接触甚至出现磨损，从而导致绝缘失效，本申请通过设置第三固定部33进行绝缘隔离能进一步提高柔性电连接件2的电连接可靠性。特别地，上述曲面部331包括多个折痕331a，通过设置多个折痕331a形成具有不同曲率的曲面部331，或者可以通过设置多个折痕331a形成不同长度的第三固定部33，从而适合不同的应用场合。此外，图6和图8的直面部332的设计长度也不同(图8中的直面部332比图6中的直面部332的长度长)，如此也能实现第三固定部33适应不同应用场合的设计要求。
具体地，本申请上述实施例提供的固定件3为一体注塑成型结构，如此可增加固定件3的加工效率和降低固定件3的加工成本。需要指出的是，本申请的第三固定部33也可不具有多个折痕331a，而是通过一体注塑所形成的固定件3本身就具有可弯曲的第三固定部33，也就是说，一体注塑出的固定件3的第三固定部33具有柔性。
综上所述，本申请提供的固定件3具有固定柔性电连接件2并起到绝缘隔离作用，同时还具有保护输出极12绝缘隔离的作用，相比常用绝缘结构而言，将固定限制柔性电连接件2变形和保护输出极12功能进行了集成，减少了零部件数量，提高装配效率，极大降低了成本。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (11)

  1. 一种电池包，包括：
    多个电池模组，每个所述电池模组均包括多个电连接的单体电池，每个所述电池模组沿高度方向(Z)和沿长度方向(X)的连接处均设有输出极；
    柔性电连接件，与所述输出极电连接，所述柔性电连接件设于所述电池模组沿长度方向(X)的端部；
    固定件，设于所述柔性电连接件的外部，以将所述柔性电连接件固定于所述电池模组上。
  2. 根据权利要求1所述的电池包，其中，所述固定件设于所述柔性电连接件沿第一高度方向(Z1)的外部以及所述输出极沿长度方向(X)的外部。
  3. 根据权利要求1所述的电池包，其中，所述固定件包括第一固定部，所述第一固定部具有空腔，所述空腔能够容纳部分所述柔性电连接件。
  4. 根据权利要求3所述的电池包，其中，所述第一固定部设有卡勾；
    所述电池模组通过扎带固定，所述卡勾与所述扎带插接连接；或
    所述电池模组沿长度方向(X)的端部设有端板，所述卡勾与所述端板插接连接。
  5. 根据权利要求3所述的电池包，其中，所述第一固定部具有第一勾合部和第二勾合部，所述第一勾合部与所述第二勾合部卡接。
  6. 根据权利要求3所述的电池包，其中，所述固定件还包括与所述第一固定部连接的第二固定部；
    所述第二固定部沿宽度方向(Y)两侧的下方分设有第一挡板，所述第一挡板设于所述输出极沿宽度方向(Y)的外侧。
  7. 根据权利要求6所述的电池包，其中，两个所述第一挡板沿长度方向(X)的端部连接有第二挡板；
    所述第一挡板和所述第二挡板围成一收容腔，所述收容腔设于所述输出极沿长度方向(X)的上方。
  8. 根据权利要求6或7所述的电池包，其中，所述固定件还包括第三固定部，所述第三固定部分别与所述第一固定部和所述第二固定部连接；
    所述第三固定部设于所述柔性电连接件沿第一高度方向(Z1)的端部的外部以及所述输出极沿长度方向(X)的端部的外部。
  9. 根据权利要求8所述的电池包，其中，所述第三固定部具有曲面部，或
    所述第三固定部具有直面部和曲面部。
  10. 根据权利要求8或9所述的电池包，其中，所述第一固定部、所述第二固定部和所述第三固定部一体注塑成型。
  11. 一种车辆，包括权利要求1-10任一项所述的电池包。
PCT/CN2020/081741 2019-04-19 2020-03-27 电池包 WO2020211618A1 (zh)

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