WO2019148615A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2019148615A1
WO2019148615A1 PCT/CN2018/080690 CN2018080690W WO2019148615A1 WO 2019148615 A1 WO2019148615 A1 WO 2019148615A1 CN 2018080690 W CN2018080690 W CN 2018080690W WO 2019148615 A1 WO2019148615 A1 WO 2019148615A1
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WO
WIPO (PCT)
Prior art keywords
connecting portion
pole
battery module
connecting piece
electrode
Prior art date
Application number
PCT/CN2018/080690
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English (en)
French (fr)
Inventor
刘杨
陈亮美
李中泽
章华
秦峰
马林
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 WO2019148615A1 publication Critical patent/WO2019148615A1/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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of energy storage devices, and in particular, to a battery module.
  • the power battery is composed of a plurality of single cells, and each of the individual cells is connected by an electrode connection piece, thereby obtaining a larger current value or voltage value.
  • the positive and negative columns of the single cell are usually made of different materials, and the electrode connecting piece is generally made of a conductive material, which makes the electrode connecting piece connect with the pole of the single cell. Since the two are dissimilar materials, the phenomenon of poor soldering often occurs, which adversely affects the product quality of the battery module.
  • the present application provides a battery module to solve the problem of poor soldering between the electrode connecting piece and the pole.
  • the present application provides a battery module including a single battery, the single battery including a first pole and a second pole, and at least one of the first pole and the second pole are disposed a positioning boss, the first pole and the second pole being made of a dissimilar material;
  • An electrode connecting piece the electrode connecting piece includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the second connecting portion, and at least one of the positioning holes is disposed;
  • the first connecting portion is the same material as the first pole and is connected to each other;
  • the second connecting portion is the same material as the second pole and is connected to each other;
  • the positioning hole and the positioning boss are positioned and engaged in a direction perpendicular to a thickness direction of the electrode connecting piece.
  • the first pole or the second pole is provided with the positioning boss, and the first connecting portion or the second connecting portion is provided with the positioning hole.
  • the positioning hole is a through hole, and the positioning hole penetrates the electrode connecting piece along a thickness direction of the electrode connecting piece.
  • an upper surface of the positioning boss is flush with an upper surface of the electrode connecting piece.
  • At least a portion of the second connecting portion is stacked on the first connecting portion along a thickness direction of the electrode connecting piece.
  • the first connecting portion is integrally stacked on the second connecting portion, and the positioning hole penetrates the first connecting portion and the second connecting portion along a thickness direction of the electrode connecting piece .
  • the electrode connecting piece further includes an overhanging flow portion.
  • the overhanging flow portion, the first connecting portion and the second connecting portion are directly connected to the first pole or the second pole;
  • the overhanging flow portion and the positioning hole are respectively disposed on the first connecting portion and the second connecting portion.
  • one end of the overhanging flow portion is flush with an end of the first connecting portion.
  • the positioning hole is an elongated structure and extends along a length direction of the electrode connecting piece.
  • the electrode connecting piece further includes an adjusting portion
  • the adjusting portion protrudes toward or away from the unit cell, and the first connecting portion is connected to the second connecting portion through the adjusting portion.
  • the materials of the first pole and the second pole are respectively corresponding to the materials of the first connecting portion and the second connecting portion, so that the process of connecting the electrode connecting piece and the pole is performed.
  • the connection occurs between the same materials, which can prevent the occurrence of poor soldering, thereby improving the product quality of the battery module.
  • FIG. 1 is a schematic structural diagram of a battery module according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a single battery in a battery module according to an embodiment of the present application
  • FIG. 3 is a schematic structural view of an electrode connecting piece in a battery module according to an embodiment of the present application.
  • FIG. 4 is a cross-sectional view of an electrode tab provided in an embodiment of the present application.
  • FIG. 5 is another schematic structural diagram of an electrode connecting piece in a battery module according to an embodiment of the present application.
  • FIG. 6 is a cross-sectional view of another electrode connecting sheet according to an embodiment of the present application.
  • the embodiment of the present application provides a battery module including a single battery 1 and an electrode connecting piece 2, and the different single cells 1 are connected by an electrode connecting piece 2, thereby A voltage value or a current value that satisfies the demand can be obtained.
  • the unit cell 1 includes a first pole 11 and a second pole 12, and the first pole 11 and the second pole 12 may be formed of different materials, and the first pole 11 and the first At least one of the two poles 12 may be provided with a positioning boss 100; correspondingly, as shown in FIG.
  • the electrode connecting piece 2 may include a first connecting portion 21 and a second connecting portion 22, the first connection The portion 21 and the second connecting portion 22 are connected to each other, and at least one of the first connecting portion 21 and the second connecting portion 22 is provided with a positioning hole 200; in the process of connecting the different unit cells 1 through the electrode connecting piece 2
  • the first connecting portion 21 of the same material may be connected to the first pole 11; likewise, the second connecting portion 22 of the same material is connected to the second pole 12 and perpendicular to the thickness of the electrode connecting piece 2
  • the precise positioning of the electrode connecting piece 2 can be achieved by means of the positioning boss 100 and the positioning hole 200 which are mutually positioned and matched.
  • the electrode connecting piece 2 may be formed of two different metal materials, and the dissimilar metals may be joined together by a process such as cold pressing or hot pressing to form an electrode connecting piece including the first connecting portion 21 and the second connecting portion 22 . 2;
  • the electrode tab 2 can also be made of other conductive materials.
  • the positioning hole 200 can be formed on the electrode connecting piece 2 by means of punching, milling or drilling. The specific parameters such as the shape and size of the positioning hole 200 can be determined by those skilled in the art according to actual conditions.
  • the first pole 11 and the second pole 12 of the unit cell 1 may be formed of different metal materials, for example, the first pole 11 and the second pole 12 may be respectively made of metal copper and metal. Made of aluminum.
  • the positioning boss 100 can be formed directly during the manufacturing process of the first pole 11 and/or the second pole 12.
  • the positioning hole 200 may be disposed only on the first connecting portion 21 or the second connecting portion 22, or may be provided on the first connecting portion 21 and the second connecting portion 22; likewise, the positioning boss 100 is also .
  • the positioning boss 100 needs to be disposed corresponding to the positioning hole 200 to achieve precise positioning of the electrode connecting piece 2.
  • the first pole 11 and the first connecting portion 21 are connected, and the materials are the same, and at the same time, the second pole 12 is connected to the second connecting portion 22. And the materials of the two are the same, which can prevent the phenomenon of poor soldering when the poles of the unit cell 1 and the electrode connecting piece 2 are connected, thereby improving the product quality of the battery module.
  • the positioning boss 100 may be disposed only on the first pole 11 or the second pole 12, and correspondingly, the positioning hole 200 may be disposed only on the first connecting portion 21 or the second connecting portion 22, so that the setting may be Reduce the amount of labor for the staff.
  • the positioning hole 200 can be processed only on the first connecting portion 21, and correspondingly, only the positioning boss 100 is disposed on the first pole 11 , and when assembling the battery module, only through a set of positioning holes 200
  • the positioning of the boss 100 can achieve precise positioning of the electrode connecting piece 2; at the same time, due to individual differences between different single cells 1, and assembly tolerances, etc., the spacing between adjacent single cells 1 is likely to be different.
  • the positioning hole 200 may be provided as a through hole, and the positioning hole 200 penetrates the electrode tab 2 in the thickness direction of the electrode tab 2 .
  • the positioning hole 200 penetrating the electrode connecting piece 2 in the thickness direction can be processed by means of a drilling machine or a milling machine, so that the worker can directly observe the positioning boss on the pole directly from above the electrode connecting piece 2.
  • the position of 100 so that the positioning work of the electrode connecting piece 2 can be completed more easily; at the same time, in the process of connecting the electrode connecting piece 2 and the pole by welding, the electrode connecting piece 2 can be directly connected from above the electrode connecting piece 2 and Polar column, which can improve the convenience of welding work.
  • the upper surface of the positioning boss 100 may be disposed flush with the upper surface of the electrode connecting piece 2, that is, the upper surface of the positioning boss 100 extending into the positioning hole 200 is flat with the upper surface of the electrode connecting piece 2. Qi, this can further reduce the difficulty of the staff welding work; at the same time, it can also increase the overcurrent area between the electrode connecting piece 2 and the pole to improve the overcurrent capability of the entire battery module.
  • first connecting portion 21 may be stacked on the second connecting portion 22 in the thickness direction of the electrode connecting piece 2, and the first connecting portion 21 and the second connecting portion 22 may be enlarged.
  • the contact area between them thereby increasing the strength of the connection between the two, as well as the flow area and the like.
  • the first connecting portion 21 and the second connecting portion 22 may each be formed of a metal material, and the first connecting portion 21 may be pressed against the second connecting portion 22 by a process such as cold pressing or hot pressing, thereby forming a laminated arrangement.
  • the electrode connecting piece 2 may be provided by stacking a portion of the first connecting portion 21 and a portion of the second connecting portion 22; or the first connecting portion 21 may be integrally stacked on a portion of the second connecting portion 22; or The whole of the connecting portion 21 is stacked on the whole of the second connecting portion 22, and one of those skilled in the art can determine which one of the above three stacking methods is adopted according to actual needs to adapt to different working conditions.
  • the first connecting portion 21 can be integrally stacked on the second connecting portion 22, that is, the two are completely laminated, which facilitates the work of the electrode connecting piece 2 to be completed more quickly and easily by the worker. And the electrode connecting piece 2 including the two metals is easily formed; correspondingly, in order to ensure that the electrode connecting piece 2 and the first pole 11 and the second pole 12 are still the same metal connection, the positioning hole 200 can be made.
  • the first connecting portion 21 and the second connecting portion 22 are penetrated in the thickness direction of the electrode connecting piece 2.
  • the electrode connecting piece 2 provided by the present application may further include an overhanging flow portion 23, and the overhanging flow portion 23, the first connecting portion 21 and the second connecting portion 22 may be combined with the first pole 11 or The second pole 12 is directly connected, and the overhanging portion 23 can be disposed on the first connecting portion 21.
  • the second connecting portion 22 can be provided with a positioning hole 200.
  • the positioning hole 200 can be processed only on the second connecting portion 22; however, since the second connecting portion 22 and the second pole 12 pass between The positioning boss 100 is connected, and the over-flow area is relatively large; and the first connecting portion 21 and the first pole 11 are only over-flowed through the surface contacted by the two, and the overcurrent capability is relatively small, so that By increasing the overcurrent flow portion 23 to improve the overcurrent capability between the first connecting portion 21 and the first pole portion 11, the overhanging flow portion 23 can be integrally formed with the first connecting portion 21 to ensure the overhanging flow.
  • the portion 23 has a reliable connection stability with the first connecting portion 21.
  • one end of the overhanging flow portion 23 may be flush with one end of the first connecting portion 21, which can ensure the overcurrent capability of the side of the first connecting portion 21 on the electrode connecting piece 2, and the electrode connecting piece 2
  • the shape is relatively regular and easy to process.
  • the positioning hole 200 and the positioning boss 100 may each be provided with a strip-like structure, and both extend along the length direction of the electrode connecting piece 2, and at the same time, strip-shaped
  • the positioning hole 200 can also increase the length of the weld between the electrode tab 2 and the first pole 11 or the second pole 12 as much as possible, thereby ensuring the connection reliability between the two.
  • the positioning boss 100 and the positioning hole 200 can be disposed in an elongated structure along the length direction of the electrode connecting piece 2. Extending so that during the soldering process, most of the structures in the electrode connecting piece 2 can be directly connected to the poles to further improve the connection stability between the electrode connecting piece 2 and the pole; at the same time, the elongated structure
  • the positioning boss 100 and the positioning hole 200 can also limit the relative displacement between the electrode connecting piece 2 and the pole to a greater extent to ensure the safe operation of the entire battery module.
  • the specific shape of the long positioning hole 20 may be a rectangle, and the aspect ratio may be between 3:1 and 10:1; of course, the positioning hole 20 may have other shapes, such as a long waist hole, etc. Improvements made by the skilled person in the actual production process according to their own needs are also within the scope of the present application.
  • the electrode tab 2 in the battery module may further include an adjusting portion 24 , and the first connecting portion 21 may pass through the adjusting portion 24
  • the second connecting portion 22 is connected, and the adjusting portion 24 can be protruded toward or away from the unit cell 1 in such a manner that the electrode connecting piece 2 further has a function of adjusting the height difference between the different unit cells 1.
  • the adjusting portion 24 can be formed on the electrode connecting piece 2 by bending or punching, and the adjusting portion 24 can be an arc structure.
  • the curved adjusting portion 24 can pass through the curved portion.
  • the spacing between the unit cells 1 is adjusted, and the adjusting portion 24 can be protruded toward the unit cell 1 in such a manner as to reduce the battery mode occupied by the electrode tab 2 in the thickness direction thereof.
  • the installation space in the group can further increase the energy density of the battery module, and those skilled in the art can determine the size of the adjustment portion 24 according to the actual situation.
  • the adjusting portion 24 can also protrude away from the unit cell 1. By moving the adjusting portion 24 away from the unit cell 1, it can be ensured that the electrode connecting piece 2 is not connected to the pole. Contact or connection with any other part of the unit cell 1 can further improve the safety of the battery module.

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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

本申请涉及储能器件技术领域，尤其涉及一种电池模组。该电池模组包括单体电池和电极连接片，所述单体电池包括第一极柱和第二极柱，所述第一极柱和所述第二极柱中至少一者上设置有定位凸台，所述第一极柱与所述第二极柱由异种材料制成；所述电极连接片包括第一连接部和第二连接部，所述第一连接部与所述第二连接部连接，且至少一者上设置有定位孔；其中：所述第一连接部与所述第一极柱的材料相同，且互相连接；所述第二连接部与所述第二极柱的材料相同，且互相连接；在垂直于所述电极连接片厚度方向的方向上，所述定位孔和所述定位凸台定位配合。本申请所提供的电池模组中电极连接片与单体电池之间不易出现焊接不良现象，因而其品质较好。

Description

电池模组 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
随着科技的进步，动力电池作为一种清洁的可持续能源被广泛使用。我们知道，动力电池是由多个单体电池组成的，且各个单体电池之间通过电极连接片连接，从而得到更大的电流值或电压值。但是，单体电池的正负极柱通常是由不同材料制作的，而电极连接片一般是由一种导电材料制作的，这使得在电极连接片与单体电池的极柱连接的过程中，由于二者为异种材料，往往会出现焊接不良的现象，这对电池模组的产品品质产生不利影响。
发明内容
本申请提供了一种电池模组，以解决电极连接片与极柱之间易出现焊接不良的现象。
本申请提供了一种电池模组，包括单体电池，所述单体电池包括第一极柱和第二极柱，所述第一极柱和所述第二极柱中至少一者上设置有定位凸台，所述第一极柱与所述第二极柱由异种材料制成；
电极连接片，所述电极连接片包括第一连接部和第二连接部，所述第一连接部与所述第二连接部连接，且至少一者上设置有定位孔；
其中：
所述第一连接部与所述第一极柱的材料相同，且互相连接；
所述第二连接部与所述第二极柱的材料相同，且互相连接；
在垂直于所述电极连接片厚度方向的方向上，所述定位孔和所述定位凸台定位配合。
可选的，所述第一极柱或所述第二极柱上设置有所述定位凸台，所述 第一连接部或所述第二连接部上设置有所述定位孔。
可选的，所述定位孔为贯穿孔，沿所述电极连接片的厚度方向，所述定位孔贯穿所述电极连接片。
可选的，所述定位凸台的上表面与所述电极连接片的上表面平齐。
可选的，沿所述电极连接片的厚度方向，所述第二连接部的至少一部分叠设于所述第一连接部上。
可选的，所述第一连接部整体叠设于所述第二连接部上，沿所述电极连接片的厚度方向，所述定位孔贯穿所述第一连接部和所述第二连接部。
可选的，所述电极连接片还包括外伸过流部，
所述外伸过流部、所述第一连接部和所述第二连接部与所述第一极柱或所述第二极柱直接连接；
所述外伸过流部与所述定位孔分别设置于所述第一连接部和所述第二连接部上。
可选的，所述外伸过流部的一端与所述第一连接部的一端平齐。
可选的，所述定位孔为长条状结构，且沿所述电极连接片的长度方向延伸。
可选的，所述电极连接片还包括调节部，
所述调节部向靠近或远离所述单体电池方向凸出，所述第一连接部通过所述调节部与所述第二连接部连接。
本申请提供的技术方案可以达到以下有益效果：
本申请所提供的电池模组中，第一极柱和第二极柱的制作材料，分别与第一连接部和第二连接部的制作材料对应，使得在连接电极连接片和极柱的过程中，使连接发生在同种材料之间，这可以防止出现焊接不良的现象，进而可以提升电池模组的产品品质。
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为本申请实施例所提供的电池模组的结构示意图；
图2为本申请实施例所提供的电池模组中单体电池的结构示意图；
图3为本申请实施例所提供的电池模组中电极连接片的结构示意图；
图4为本申请实施例所提供的电极连接片的截面图；
图5本申请实施例所提供的电池模组中电极连接片的另一种结构示意图；
图6为本申请实施例所提供的另一种电极连接片的截面图。
附图标记：
1-单体电池；
11-第一极柱；
12-第二极柱；
100-定位凸台；
2-电极连接片；
21-第一连接部；
22-第二连接部；
23-外伸过流部；
24-调节部；
200-定位孔。
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
下面通过具体的实施例并结合附图对本申请做进一步的详细描述。
如图1-6所示，本申请实施例提供了一种电池模组，该电池模组包括单体电池1和电极连接片2，不同单体电池1之间通过电极连接片2连接，从而可以得到满足需求的电压值或电流值。如图2所示，单体电池1中包括第一极柱11和第二极柱12，第一极柱11和第二极柱12可以由不同的材料形成，且第一极柱11和第二极柱12中的至少一者上可以设置有定位凸台100；对应的，如图3-6所示，电极连接片2可以包括第一连接部21和第二连接部22，第一连接部21与第二连接部22互相连接，且第一连接 部21和第二连接部22中的至少一者上设置有定位孔200；在通过电极连接片2连接不同单体电池1的过程中，可以使同种材料的第一连接部21与第一极柱11连接；同样的，使材料相同的第二连接部22与第二极柱12连接，且在垂直于电极连接片2厚度方向的方向上，借助相互定位配合的定位凸台100和定位孔200，可以实现电极连接片2的精准定位。
具体的，电极连接片2可以由两种不同的金属材料形成，可以通过冷压或热压等工艺将异种金属结合到一起，形成包括第一连接部21和第二连接部22的电极连接片2；当然，电极连接片2也可以由其他导电材料制成。可以通过冲压、铣削或钻加工等方式在电极连接片2上形成定位孔200，本领域技术人员可以根据实际情况确定定位孔200的形状以及尺寸大小等具体参数。考虑加工效率以及成本因素，单体电池1的第一极柱11和第二极柱12可以分别由不同金属材料形成，如第一极柱11和第二极柱12可以分别由金属铜和金属铝制成。定位凸台100可以在第一极柱11和/或第二极柱12的制造过程中直接形成。定位孔200可以仅设置在第一连接部21或第二连接部22上，也可以在第一连接部21和第二连接部22上均设置定位孔200；同样的，定位凸台100也是如此。但是，定位凸台100需要与定位孔200对应设置，以实现对电极连接片2的精准定位。
上述可知，本申请所提供的电池模组中，第一极柱11和第一连接部21相连接，且二者材料相同，与此同时，第二极柱12与第二连接部22相连接，且二者的材料相同，这可以防止在连接单体电池1的极柱与电极连接片2时出现焊接不良的现象，进而可以提升电池模组的产品质量。
进一步的，可以仅在第一极柱11或第二极柱12上设置定位凸台100，相应的，可以仅在第一连接部21或第二连接部22上设置定位孔200，如此设置可以降低工作人员的劳动量。
具体的，可以仅在第一连接部21上加工定位孔200，相应的，仅在第一极柱11上设置定位凸台100，在组装电池模组时，由于仅通过一组定位孔200与定位凸台100，即可实现对电极连接片2的精准定位；同时，由于不同单体电池1之间的个体差异，以及装配公差等因素，容易造成相邻单体电池1之间的间距不同，而通过仅在电极连接片2的一侧设置定位孔200，可以有效地防止电极连接片2同时与两个极柱上的定位凸台100配 合时难度较大的问题。
为了便于工作人员将电极连接片2快速地安装到极柱的指定位置处，可以将定位孔200设置成贯穿孔，沿电极连接片2的厚度方向，定位孔200贯穿电极连接片2。
具体的，可以借助钻床或铣床等设备，加工出沿前述厚度方向贯穿电极连接片2的定位孔200，如此设置，使得工作人员可以直接从电极连接片2的上方观察到极柱上定位凸台100的位置，从而可以更容易地完成电极连接片2的定位工作；同时，在通过焊接连接电极连接片2和极柱的过程中，可以从电极连接片2的上方直接连接电极连接片2和极柱，这可以提升焊接工作的便利性。
更具体的，可以设置定位凸台100的上表面与电极连接片2的上表面平齐，即，使伸入定位孔200中的定位凸台100的上表面与电极连接片2的上表面平齐，这可以进一步降低工作人员焊接工作的难度；同时，还可以提升电极连接片2与极柱之间的过流面积，以提升整个电池模组的过流能力。
可选的，在电极连接片2的厚度方向，第一连接部21的至少一部分可以叠设在第二连接部22上，如此设置，可以增大第一连接部21与第二连接部22之间的接触面积，从而提升二者之间的连接强度，以及过流面积等。
具体的，第一连接部21和第二连接部22可以均由金属材料形成，可以采用冷压或热压等工艺将第一连接部21压在第二连接部22上，从而形成叠层设置的电极连接片2，可以将第一连接部21的一部分和第二连接部22的一部分堆叠设置；也可以使第一连接部21整体叠设在第二连接部22的一部分上；或者第一连接部21的整体叠设在第二连接部22的整体上，本领域技术人员可以根据实际需求确定采取上述三种叠层设置方法中的哪种，以适应不同工况。
一种优选的具体实施例是，第一连接部21可以整体叠设在第二连接部22上，即二者完全层叠，这有利于工作人员可以更快速简便地完成电极连接片2的加工工作，且容易形成包括两种金属的电极连接片2；相应的，为了保证电极连接片2与第一极柱11和第二极柱12之间仍均为同种 金属连接，可以使定位孔200沿电极连接片2的厚度方向贯穿第一连接部21和第二连接部22。
可选的，本申请所提供的电极连接片2还可以包括外伸过流部23，外伸过流部23、第一连接部21和第二连接部22均可以与第一极柱11或第二极柱12直接连接，外伸过流部23可以设置在第一连接部21上，相对应的，第二连接部22上可以设置有定位孔200。
显然的，由于仅加工一个定位孔200可以减少工人劳动量，因而可以仅在第二连接部22上加工且形成定位孔200；但是，由于第二连接部22与第二极柱12之间通过定位凸台100连接，其过流面积相对较大；而第一连接部21与第一极柱11之间则仅通过二者相接触的表面过流，其过流能力相对较小，因而可以通过增加外伸过流部23来提升第一连接部21与第一极柱11之间的过流能力，外伸过流部23可以与第一连接部21一体成型，以保证外伸过流部23与第一连接部21之间具有可靠的连接稳定性。
更具体的，外伸过流部23的一端可以与第一连接部21的一端平齐，这可以保证电极连接片2上第一连接部21所在侧的过流能力，且使电极连接片2的形状相对规整，便于加工。
为了提升电极连接片2与单体电池1之间的连接强度，定位孔200与定位凸台100可以均设置成长条状结构，且均沿电极连接片2的长度方向延伸，同时，长条状的定位孔200还可以尽量增大电极连接片2与第一极柱11或第二极柱12之间焊缝的长度，从而保证二者之间的连接可靠性。
具体的，由于不同单体电池1之间的电极连接片2通常为近似长方形的结构，因而可以设置定位凸台100与定位孔200均为长条状结构，且沿电极连接片2的长度方向延伸，从而在焊接过程中，可以使电极连接片2中大部分结构可以直接与极柱相连接，以进一步提升电极连接片2与极柱之间的连接稳定性；同时，长条状结构的定位凸台100和定位孔200还可以更大程度地限制电极连接片2与极柱之间的相对位移，以保证整个电池模组安全正常工作。长条状定位孔20的具体形状可以为长方形，其长宽比可以为3:1～10:1之间；当然，定位孔20还可以为其他形状，如长腰孔等，对此，本领域技术人员在实际生产过程中根据自身需求所做的改进方案也在本申请的保护范围之内。
为了进一步提升电极连接片2调节单体电池1之间间距的能力，本申请所提供的电池模组中的电极连接片2还可以包括调节部24，第一连接部21可以通过调节部24与第二连接部22连接，且调节部24可以向靠近或远离单体电池1的方向凸出，如此设置，使得电极连接片2还具备了调节不同单体电池1间高度差的功能。
具体的，可以通过折弯或冲压的方式等在电极连接片2上形成调节部24，调节部24可以为弧形结构，在电池模组的工作过程中，弧形的调节部24可以通过弯折自身的方式，调节单体电池1之间的间距，且调节部24可以向靠近单体电池1的方向凸出，如此设置，可以减少电极连接片2在其厚度方向上所占的电池模组内的安装空间，进而可以提升电池模组的能量密度，本领域技术人员可以根据实际情况确定调节部24凸出的尺寸。同样的，在某些情况下，调节部24也可以向远离单体电池1的方向凸出，通过使调节部24远离单体电池1，可以保证电极连接片2除了与极柱连接外，不与单体电池1上其他任意部位接触或连接，进而可以提升电池模组的安全性。
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 (10)

  1. 一种电池模组，其特征在于，包括：
    单体电池，所述单体电池包括第一极柱和第二极柱，所述第一极柱和所述第二极柱中至少一者上设置有定位凸台，所述第一极柱与所述第二极柱由异种材料制成；
    电极连接片，所述电极连接片包括第一连接部和第二连接部，所述第一连接部与所述第二连接部连接，且至少一者上设置有定位孔；
    其中：
    所述第一连接部与所述第一极柱的材料相同，且互相连接；
    所述第二连接部与所述第二极柱的材料相同，且互相连接；
    所述定位孔和所述定位凸台定位配合。
  2. 根据权利要求1所述的电池模组，其特征在于，所述第一极柱或所述第二极柱上设置有所述定位凸台，所述第一连接部或所述第二连接部上设置有所述定位孔。
  3. 根据权利要求1所述的电池模组，其特征在于，所述定位孔为贯穿孔，沿所述电极连接片的厚度方向，所述定位孔贯穿所述电极连接片。
  4. 根据权利要求3所述的电池模组，其特征在于，所述定位凸台的上表面与所述电极连接片的上表面平齐。
  5. 根据权利要求3所述的电池模组，其特征在于，沿所述电极连接片的厚度方向，所述第二连接部的至少一部分叠设于所述第一连接部上。
  6. 根据权利要求5所述的电池模组，其特征在于，所述第一连接部整体叠设于所述第二连接部上，沿所述电极连接片的厚度方向，所述定位孔贯穿所述第一连接部和所述第二连接部。
  7. 根据权利要求1所述的电池模组，其特征在于，所述电极连接片还包括外伸过流部，
    所述外伸过流部、所述第一连接部和所述第二连接部与所述第一极柱或所述第二极柱直接连接；
    所述外伸过流部与所述定位孔分别设置于所述第一连接部和所述第二连接部上。
  8. 根据权利要求7所述的电池模组，其特征在于，所述外伸过流部的一端与所述第一连接部的一端平齐。
  9. 根据权利要求1所述的电池模组，其特征在于，所述定位孔为长条状结构，且沿所述电极连接片的长度方向延伸。
  10. 根据权利要求1所述的电池模组，其特征在于，所述电极连接片还包括调节部，
    所述调节部向靠近或远离所述单体电池方向凸出，所述第一连接部通过所述调节部与所述第二连接部连接。
PCT/CN2018/080690 2018-01-31 2018-03-27 电池模组 WO2019148615A1 (zh)

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