WO2020258369A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2020258369A1
WO2020258369A1 PCT/CN2019/095039 CN2019095039W WO2020258369A1 WO 2020258369 A1 WO2020258369 A1 WO 2020258369A1 CN 2019095039 W CN2019095039 W CN 2019095039W WO 2020258369 A1 WO2020258369 A1 WO 2020258369A1
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WO
WIPO (PCT)
Prior art keywords
battery module
boss
plate
heat conducting
conducting plate
Prior art date
Application number
PCT/CN2019/095039
Other languages
English (en)
French (fr)
Inventor
章华
Original Assignee
江苏时代新能源科技有限公司
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 江苏时代新能源科技有限公司 filed Critical 江苏时代新能源科技有限公司
Priority to US16/498,208 priority Critical patent/US20220123387A1/en
Priority to EP19769703.0A priority patent/EP3783686B1/en
Publication of WO2020258369A1 publication Critical patent/WO2020258369A1/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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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 energy storage devices, and in particular to a battery module.
  • the energy storage system of a new energy vehicle is usually realized by a battery module.
  • the existing battery module includes a metal lower shell, which will produce splashes when welding with other parts such as the upper cover, which leads to the failure of other parts. .
  • the weight of the metal lower shell is large, and there are many parts that need to be insulated. Once the insulation function of some parts fails, it will cause quality problems of the battery module.
  • a heat conduction plate is usually provided.
  • the lower housing is welded to the heat conduction plate, the above-mentioned splash problem also exists, and how to achieve a stable connection between the lower housing and the heat conduction plate is currently urgently needed technical problem.
  • the purpose of this application is to provide a battery module to solve the problems in the prior art and realize the stable connection between the lower casing and the heat conducting plate.
  • the present application provides a battery module, which includes a lower casing, a plurality of battery cells stacked in sequence and a heat conducting plate accommodated in the lower casing;
  • a boss is formed on the lower shell
  • a receiving hole is provided on the heat conducting plate
  • the boss is matched with the containing hole, and a part or all of the boss is fixed in the containing hole.
  • the material of the lower shell is an insulating material.
  • the material of the heat conducting plate is metal.
  • the receiving hole is a round hole
  • the boss forms a connecting part and a limiting part
  • the connecting portion is located in the receiving hole, and the limiting portion limits the thermal conductive plate.
  • the receiving hole is a tapered hole
  • the side of the boss away from the battery cell is flush with the side of the heat conducting plate away from the battery cell.
  • the number of the accommodating holes is multiple, and the plurality of accommodating holes are arranged on the edge portion of the heat conducting plate along the length direction of the battery module; and/or the accommodating holes are arranged along the The width direction of the battery module is arranged on the edge part of the heat conducting plate.
  • the lower housing includes a pair of side plates and a pair of end plates, the pair of end plates are respectively fixedly connected to the pair of side plates; the boss is along the length direction of the battery module Arranged on the bottom of the side plate; and/or the bosses are arranged on the bottom of the end plate along the width direction of the battery module.
  • the side plate includes a first plate and a second plate connected in an L shape;
  • the first plate extends along the height direction of the battery module
  • the second plate extends along the width direction of the battery module
  • the boss is arranged on the second board.
  • a thermally conductive structural glue fixed to the lower casing is provided in the lower casing.
  • the battery module further includes an upper cover, and the upper cover and the lower casing together form a receiving cavity for accommodating the plurality of battery cells.
  • the battery module provided by the present application includes a lower casing, a plurality of battery cells stacked in sequence and a heat conducting plate accommodated in the lower casing; a boss is formed on the lower casing; and a receiving hole is provided on the heat conducting plate; The boss is matched with the containing hole, and the boss is fixed in the containing hole by heat fusion. Through the cooperation of the boss and the receiving hole, and then performing hot melting, the hot-melted boss and the receiving hole form a fixed connection, which solves the problem of spatter caused by welding in the prior art and improves the connection between the lower shell and the heat conducting plate. strength.
  • Figure 1 is an exploded schematic diagram of a battery module provided by an embodiment of the application
  • FIG. 2 is a top view of the battery module provided by the first embodiment of this application.
  • Figure 3 is a cross-sectional view taken along line A-A in Figure 2;
  • Figure 4 is an enlarged view of B in Figure 3;
  • FIG. 5 is an exploded schematic diagram of the structure of the lower shell and the heat conducting plate of the battery module provided by the first embodiment of this application;
  • Figure 6 is an enlarged view of C in Figure 5;
  • FIG. 7 is a top view of a battery module provided by a second embodiment of this application.
  • Figure 8 is a cross-sectional view taken along the line E-E in Figure 7;
  • Figure 9 is an enlarged view of F in Figure 8.
  • FIG. 10 is an exploded schematic diagram of the structure of the lower shell and the heat conducting plate of the battery module provided by the second embodiment of the application;
  • Fig. 11 is an enlarged view of D in Fig. 10.
  • FIG. 1 is an exploded schematic diagram of the battery module provided by the first embodiment of the application.
  • an embodiment of the present application provides a battery module 1 including a lower casing 11 and a lower casing accommodated in it.
  • a plurality of battery cells 12 sequentially stacked in the body 11.
  • the battery module 1 further includes an upper cover 13, and the upper cover 13 and the lower casing 11 together form a receiving cavity for accommodating the plurality of battery cells 12.
  • the battery cell 12 is provided with an electrode assembly and an electrolyte, and the electrode assembly and the electrolyte react electrochemically to output electrical energy.
  • the heat generated during the reaction needs to be dissipated in time, so the battery module 1 also includes a heat conducting plate 15 for heat dissipation.
  • FIG. 2 is a top view of the battery module provided by the first embodiment of the application
  • FIG. 3 is a cross-sectional view along the line A-A in FIG. 2
  • FIG. 4 is an enlarged view of B in FIG. 3.
  • a boss 111 is formed on the lower housing 11, a receiving hole 151 is provided on the heat conducting plate 15, the boss 111 is matched with the receiving hole 151, and a part or all of the boss 111 is fixed in the receiving hole 151.
  • the battery module provided by the embodiment of the present application is provided with an accommodating hole 151 on the heat conducting plate 15, and a boss 111 is formed on the lower housing 11. Compared with the integral injection molding of the heat conducting plate 15 on the lower housing 11, only partial heating is achieved.
  • the lower casing 11 and the heat conducting plate 15 adopt the above-mentioned split structure, so that the lower casing 11 and the heat conducting plate 15 can be made of different materials.
  • the lower casing 11 can be made of insulating materials to solve the problem of splashing in the welding process of the metal lower casing in the prior art, and can reduce the weight of the battery module 1, and the heat conducting plate 15 is made of a material with better thermal conductivity.
  • a heat conducting plate 15 made of a metal material can be used to dissipate the battery cells 12 to achieve a better heat dissipation effect.
  • the lower housing 11 using insulating materials can also solve the problem of many insulating parts of the metal lower housing and easy insulation failure in the prior art.
  • the boss 111 can be formed in the injection molding process of the lower housing 11, and the receiving hole 151 is formed on the heat conducting plate 15 by machining.
  • the molding process of the boss 111 and the receiving hole 151 is very simple, and the boss 111 and the receiving hole 151
  • the hot melting process is also easy to implement.
  • the battery module 1 may include a pair of side plates 112 and a pair of end plates 113.
  • the side plates 112 and the end plates 113 fix the battery cells 12 to limit the expansion of the battery cells 12.
  • the heat conducting plate 15 may be connected to an end of the side plate 112 and the end plate 113 away from the upper cover 13, that is, the bottom of the side plate 112 and/or the end plate 113. When a plurality of battery cells 12 are accommodated in the lower casing 11, heat can be dissipated through the heat conducting plate 15.
  • the side plate 112 may include a first plate 111a, and the boss 111 is provided on the first plate 111a. As shown in FIG. 4, the side plate 112 includes a first plate 111a and a second plate 111b connected in an L shape. The first plate 111a extends along the height direction of the battery module 1 (the Z direction in FIG. 1). The second plate 111b extends along the width direction (X direction) of the battery module 1, and the boss 111 is provided on the second plate 111b.
  • the boss 111 and the side plate 111 may be integrally injection molded. In other embodiments, the boss 111 can also be provided on the end plate 112 and integrated with the end plate 112 by injection molding.
  • FIG. 5 is an exploded schematic view of the structure of the lower shell and the heat conducting plate of the battery module provided by the first embodiment of the application
  • FIG. 6 is an enlarged view of C in FIG. 5.
  • the receiving hole 151 is a round hole
  • the front boss 111 is cylindrical, as shown in FIG. 6.
  • the boss 111 after heat fusion forms a connecting portion 111 a and a limiting portion 111 b.
  • the connecting portion 111 a is located in the receiving hole 151, and the limiting portion 111 b limits the thermal conductive plate 15.
  • the above structure can realize the rapid assembly of the heat-conducting plate 15, and the restriction effect of the position-limiting portion 111b will not cause the heat-conducting plate 15 to fall out, so that the connection of the heat-conducting plate 15 and the lower casing 11 is more reliable.
  • the aforementioned accommodating hole 151 and the boss 111 can also have other shapes, as long as the boss 111 passes through the accommodating hole 151 and then heat-melts.
  • FIG. 7 is a top view of the battery module provided by the second embodiment of the application
  • FIG. 8 is a cross-sectional view taken along the line E-E in FIG. 7,
  • FIG. 9 is an enlarged view of F in FIG. 8.
  • the receiving hole 151 is a tapered hole, that is, the hole of the receiving hole 151 on the side far from the battery cell 12 is larger than that on the side close to the battery cell 12 Aperture.
  • the boss 111 before the heat fusion is cylindrical, and the side of the boss 111 after the heat fusion away from the battery cell 12 is flush with the side of the heat conducting plate 15 away from the battery cell 12.
  • FIG. 10 is an exploded schematic diagram of the structure of the lower shell and the heat conducting plate in the battery module provided by the second embodiment of the application
  • FIG. 11 is an enlarged view of D in FIG. 10.
  • FIG. 11 shows the state of the boss 111 after heat fusion.
  • the boss 111 is completely filled in the receiving hole 151, forming a shape similar to a "nail cap".
  • the side of the fused boss 111 away from the battery cell 12 is flush with the side of the heat-conducting plate 15 away from the battery cell 12, which reduces the space occupied by the battery module 1, and has high space utilization, which improves the battery module 1 Energy Density.
  • the material of the lower housing 11 is a polymer material with insulating properties, which is formed by molding methods such as injection molding, extrusion, and compression molding. In this way, the problem of spattering of the metal lower shell during welding in the prior art will not occur, leading to failure of other components, and the quality of the battery module 1 is improved.
  • the shape of the battery cell 12 may be square or cylindrical, which is not limited herein.
  • the material of the upper cover 13 may also be a polymer material with insulating properties, which is formed by molding methods such as injection molding, extrusion, and molding.
  • the material of the heat conducting plate 15 is metal, and its thermal conductivity is higher than the thermal conductivity of the lower casing 11 and the upper cover 13. Specifically, it may be a metal material such as copper and aluminum, which is not further limited here.
  • the heat conducting plate 15 is a rectangular plate. It can be understood that the heat conducting plate 15 may also have other shapes as long as it matches the shape of the lower housing 11.
  • the accommodating holes 151 there are multiple accommodating holes 151, and the plurality of accommodating holes 151 can be arranged along the length direction (Y direction) of the battery module 1 on the edge of the heat conducting plate 15, and the accommodating holes 151 can also be arranged along the battery mold.
  • the width direction (X direction) of the group 1 is arranged on the edge portion of the heat conducting plate 15.
  • the receiving holes 151 can also be arranged on the heat conducting plate along the width direction (X direction) and the length direction (Y direction) of the battery module 1.
  • the accommodating holes 151 are preferably arranged along the length and width directions of the battery module 1 on the edge of the heat conducting plate 15, and more accommodating holes 151 and protrusions on the lower housing 11 can be provided.
  • the platform 111 cooperates with more connection points and greater connection strength, thereby ensuring the overall structural strength of the battery module 1.
  • the boss 111 corresponds to the position of the receiving hole 151, and can be arranged at the bottom of the side plate 111 along the length direction (Y direction) of the battery module 1, or along the width direction of the battery module 1 ( X direction) is arranged at the bottom of the end plate 112, and can also be arranged on the side plate 111 and the end plate 112 along the length direction of the battery module 1 (Y direction) and along the width direction of the battery module 1 (X direction).
  • the above-mentioned bosses 111 are provided at the bottom of each.
  • a structural glue 14 fixed to the lower casing 11 is provided in the lower casing 11, and the structural glue 14 is preferably a thermal conductive structural glue.
  • the structural glue 14 is preferably a thermal conductive structural glue.
  • the accommodating hole 151 of the heat-conducting plate 15 and the boss 111 of the lower housing 11 are matched for heat-fusion, so as to realize a stable connection between the heat-conducting plate 15 and the lower housing 11.
  • the process sequence of applying glue first and then assembling the thermal conductive plate 15 can also prevent the glue from overflowing from the lower shell 11, and the thermal conductive structural glue can help heat transfer and further improve the heat dissipation effect of the battery module 1.

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

Abstract

本申请涉及储能器件领域，尤其涉及一种电池模组，包括下壳体、容置于所述下壳体中的依次堆叠的多个电池单体以及导热板；所述下壳体上形成有凸台；所述导热板上设置有容纳孔；所述凸台与所述容纳孔相配合，且凸台热熔固定在容纳孔内。本申请通过凸台与容纳孔的配合，再进行热熔，热熔后的凸台与容纳孔形成固定连接，解决了现有技术中焊接引起的飞溅问题，同时提高了下壳体与导热板的连接强度。

Description

电池模组
本申请要求于2019年6月28日提交中国专利局、申请号为201920997463.8、发明名称为“电池模组”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及储能器件领域，尤其涉及一种电池模组。
背景技术
新能源汽车的储能***通常是由电池模组实现的，现有的电池模组包括金属下壳体，在与上盖等其他部件焊接时会产生飞溅，由此导致了其他部件的功能失效。另外，金属下壳体的重量大，而且需要绝缘的部位较多，一旦有些部位绝缘功能失效，会导致电池模组的质量问题。
为了给电池模组散热，通常设置有导热板，下壳体在与导热板焊接时，同样存在上述的飞溅问题，而且如何能够实现下壳体与导热板之间稳定的连接是目前亟待解决的技术问题。
申请内容
本申请的目的在于提供一种电池模组，以解决现有技术中的问题，实现下壳体与导热板的稳定连接。
本申请提供了一种电池模组，其中，包括下壳体、容置于所述下壳体中的依次堆叠的多个电池单体以及导热板；
所述下壳体上形成有凸台；
所述导热板上设置有容纳孔；
所述凸台与所述容纳孔相配合，且所述凸台的一部分或全部固定在所述容纳孔内。
优选地，所述下壳体的材质为绝缘材料。
优选地，所述导热板的材质为金属。
优选地，所述容纳孔为圆孔；
所述凸台形成连接部和限位部；
所述连接部位于所述容纳孔内，所述限位部对所述导热板限位。
优选地，所述容纳孔为锥形孔；
所述凸台远离所述电池单体的一面与所述导热板远离所述电池单体的一面平齐。
优选地，所述容纳孔的数量是多个，多个所述容纳孔沿着所述电池模组的长度方向排布在所述导热板的边缘部分；和/或所述容纳孔沿着所述电池模组的宽度方向排布在所述导热板的边缘部分。
优选地，所述下壳体包括一对侧板和一对端板，所述一对端板分别与所述一对侧板固定连接；所述凸台沿着所述电池模组的长度方向排布在所述侧板的底部；和/或所述凸台沿着所述电池模组的宽度方向排布在所述端板的底部。
优选地，所述侧板包括呈L形连接的第一板和第二板；
所述第一板沿所述电池模组的高度方向延伸；
所述第二板沿所述电池模组的宽度方向延伸；
所述凸台设置于所述第二板。
优选地，所述下壳体内设置有固定于所述下壳体的导热结构胶。
优选地，所述电池模组还包括上盖，所述上盖与所述下壳体共同形成容置所述多个电池单体的容纳腔。
申请提供的技术方案可以达到以下有益效果：
本申请提供的电池模组，包括下壳体、容置于下壳体中的依次堆叠的多个电池单体以及导热板；下壳体上形成有凸台；导热板上设置有容纳孔；凸台与容纳孔相配合，且凸台热熔固定在容纳孔内。通过凸台与容纳孔的配合，再进行热熔，热熔后的凸台与容纳孔形成固定连接，解决了现有技术中焊接引起的飞溅问题，同时提高了下壳体与导热板的连接强度。
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
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例所提供的电池模组的分解示意图；
图2为本申请第一种实施例所提供的电池模组的俯视图；
图3为图2中的A-A向剖视图；
图4为图3中的B处放大图；
图5为本申请第一种实施例所提供的电池模组中下壳体与导热板相配合的结构分解示意图；
图6为图5中的C处放大图；
图7为本申请第二种实施例所提供的电池模组的俯视图；
图8为图7中的E-E向剖视图；
图9为图8中的F处放大图；
图10为本申请第二种实施例所提供的电池模组中下壳体与导热板相配合的结构分解示意图；
图11为图10中的D处放大图。
附图标记：
1-电池模组；
11-下壳体；
111-凸台；
111a-连接部；
111b-限位部；
112-侧板；
112a-第一板；
112b-第二板；
113-端板；
12-电池单体；
13-上盖；
14-结构胶；
15-导热板；
151-容纳孔。
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
下面将结合附图对本申请的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
图1为本申请第一种实施例所提供的电池模组的分解示意图，如图1所示，本申请实施例提供了一种电池模组1，包括下壳体11和容置于下壳体11中的依次堆叠的多个电池单体12。电池模组1还包括上盖13，上盖13与下壳体11共同形成容纳该多个电池单体12的容纳腔。
电池单体12内设置有电极组件和电解液，电极组件与电解液发生电化学反应，从而输出电能。反应过程中产生的热量需要及时的散发，因此电池模组1还包括导热板15来进行散热。
图2为本申请第一种实施例所提供的电池模组的俯视图，图3为图2中的A-A向剖视图，图4为图3中的B处放大图。
下壳体11上形成有凸台111，导热板15上设置有容纳孔151，凸台111与容纳孔151相配合，且凸台111的一部分或全部固定在容纳孔151内。这样能够解决现有技术中由于焊接导致的飞溅问题，还能提高下壳体11与导热板15的连接强度。本申请实施例提供的电池模组在导热板15上设置容纳孔151，在下壳体11上形成凸台111，相比于导热板15整体注塑在下壳体11而言，仅有局部受热，而不是整个导热板15的整体大面积受热，因此对导热板15不会发生高温变质等问题，也不会发生较大的变形，导致其平面度下降。因为，一旦导热板15的平面度下降，会影响电池模组1与外界的接触效果，进而影响电池模组1的散热。
下壳体11与导热板15采用上述的分体式结构，这样就可以设置下壳体 11与导热板15为不同的材质。其中，下壳体11可以采用绝缘材料以解决现有技术中金属下壳体在焊接过程中的飞溅问题，而且能够实现电池模组1的减重，导热板15则采用导热性能较好的材质，例如可以采用金属材质的导热板15对电池单体12进行散热，以起到较佳的散热效果。另外，采用绝缘材料的下壳体11还能解决现有技术中金属下壳体绝缘部位多、容易绝缘失效的问题。
可以在下壳体11的注塑成型过程中形成凸台111，通过机械加工在导热板15上形成容纳孔151，凸台111和容纳孔151的成型工艺均十分简易，而且凸台111与容纳孔151的热熔过程也易于实现。
具体而言，电池模组1可以包括一对侧板112和一对端板113，侧板112和端板113对电池单体12进行固定，以对电池单体12的膨胀进行限制。导热板15可以连接在侧板112和端板113远离上盖13的一端，即侧板112和/或端板113的底部。当多个电池单体12容置于下壳体11内时，能够通过导热板15进行散热。
侧板112可以包括第一板111a，上述凸台111设置于第一板111a。也可以如图4所示，侧板112包括呈L形连接的第一板111a和第二板111b，第一板111a沿电池模组1的高度方向(图1中的Z向)延伸，第二板111b沿电池模组1的宽度方向(X向)延伸，上述凸台111设置在第二板111b上。在一种实施例中，凸台111可以与侧板111一体注塑成型。在其他的实施例中，凸台111也可以设置在端板112上，与端板112一体注塑成型。
图5为本申请第一种实施例所提供的电池模组中下壳体与导热板相配合的结构分解示意图，图6为图5中的C处放大图。
作为一种具体的实现方式，容纳孔151为圆孔，热熔前凸台111为圆柱状，如图6所示。热熔后的凸台111形成连接部111a和限位部111b，参照图4，连接部111a位于容纳孔151内，限位部111b对导热板15限位。
上述结构能够实现导热板15的快速组装，而且限位部111b的限位作用也不会使导热板15脱出，使导热板15与下壳体11的连接更可靠。
当然，上述的容纳孔151和凸台111也可以是其他形状，只要能够满足凸台111从容纳孔151中穿过后热熔即可。
图7为本申请第二种实施例所提供的电池模组的俯视图，图8为图7中 的E-E向剖视图，图9为图8中的F处放大图。
作为一种具体的实现方式，如图7至图9所示，容纳孔151为锥形孔，即，容纳孔151远离电池单体12的一侧的孔径大于靠近电池单体12的一侧的孔径。热熔前凸台111为圆柱状，热熔后的凸台111远离电池单体12的一面与导热板15远离电池单体12的一面平齐。
图10为本申请第二种实施例所提供的电池模组中下壳体与导热板相配合的结构分解示意图，图11为图10中的D处放大图。
参照图9和图11，图11示出的是热熔后凸台111的状态，这时，凸台111完全填充在容纳孔151内，形成一个类似于“钉帽”的形状。热熔后的凸台111远离电池单体12的一面与导热板15远离电池单体12的一面平齐，减少了电池模组1的占据空间，空间利用率高，提高了电池模组1的能量密度。
上文已提及，优选地，上述下壳体11的材质是具有绝缘性能的高分子材料，通过注塑、挤出和模压等成型方式形成。这样，不会产生现有技术中金属下壳体在焊接时产生飞溅，导致其他部件失效的问题，提高了电池模组1的质量。
电池单体12的外形可以是为方形或圆柱形，在此不作限定。
上盖13的材质也可以是是具有绝缘性能的高分子材料，通过注塑、挤出和模压等成型方式形成。
导热板15的材质为金属，其导热率高于下壳体11和上盖13的导热率。具体可以是铜、铝等金属材质，在此不作进一步限定。
进一步地，导热板15为矩形板。可以理解的是，导热板15也可以是其他的形状，只要与下壳体11的形状配合即可。
进一步地，容纳孔151的数量是多个，多个容纳孔151可以沿着电池模组1的长度方向(Y向)排布在导热板15的边缘部分，容纳孔151也可以沿着电池模组1的宽度方向(X向)排布在导热板15的边缘部分，容纳孔151还可以沿着电池模组1的宽度方向(X向)和长度方向(Y向)均排布在导热板15的边缘部分。本实施例中，容纳孔151优选地沿着电池模组1的长度方向和宽度方向在导热板15的边缘部分均有排布，能够设置更多的容纳孔151与下壳体11上的凸台111配合，连接点更多，连接强度也更大，从而保证了 电池模组1的整体结构强度。
相应地，凸台111与容纳孔151的位置相对应，可以沿着电池模组1的长度方向(Y向)排布在侧板111的底部，也可以沿着电池模组1的宽度方向(X向)排布在在端板112的底部，还可以沿着电池模组1的长度方向(Y向)和沿着电池模组1的宽度方向(X向)在侧板111和端板112的底部均设置上述凸台111。
优选地，下壳体11内设置有固定于下壳体11的结构胶14，结构胶14优选为导热结构胶。组装电池模组1时，先将下壳体11、电池单体12和上盖13组装，再进行涂胶，这样能够对涂胶操作实时监控，保证了涂胶效果。涂胶后，再将导热板15的容纳孔151与下壳体11的凸台111配合进行热熔，实现导热板15与下壳体11的稳定连接。先涂胶后组装导热板15的工艺顺序，还能够防止胶从下壳体11中溢出，而且导热结构胶能够有助于热量的传递，进一步提高电池模组1的散热效果。
以上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，包括下壳体、容置于所述下壳体中的依次堆叠的多个电池单体以及导热板；
    所述下壳体上形成有凸台；
    所述导热板上设置有容纳孔；
    所述凸台与所述容纳孔相配合，且所述凸台的一部分或全部固定在所述容纳孔内。
  2. 根据权利要求1所述的电池模组，其特征在于，所述下壳体的材质为绝缘材料。
  3. 根据权利要求1所述的电池模组，其特征在于，所述导热板的材质为金属。
  4. 根据权利要求1所述的电池模组，其特征在于，所述容纳孔为圆孔；所述凸台形成连接部和限位部；
    所述连接部位于所述容纳孔内，所述限位部对所述导热板限位。
  5. 根据权利要求1所述的电池模组，其特征在于，所述容纳孔为锥形孔；所述凸台远离所述电池单体的一面与所述导热板远离所述电池单体的一面平齐。
  6. 根据权利要求1所述的电池模组，其特征在于，所述容纳孔的数量是多个，多个所述容纳孔沿着所述电池模组的长度方向排布在所述导热板的边缘部分；和/或所述容纳孔沿着所述电池模组的宽度方向排布在所述导热板的边缘部分。
  7. 根据权利要求6所述的电池模组，其特征在于，所述下壳体包括一对侧板和一对端板，所述一对端板分别与所述一对侧板固定连接；所述凸台沿着所述电池模组的长度方向排布在所述侧板的底部；和/或所述凸台沿着所述电池模组的宽度方向排布在所述端板的底部。
  8. 根据权利要求7所述的电池模组，其特征在于，所述侧板包括呈L形连接的第一板和第二板；
    所述第一板沿所述电池模组的高度方向延伸；
    所述第二板沿所述电池模组的宽度方向延伸；
    所述凸台设置于所述第二板。
  9. 根据权利要求1所述的电池模组，其特征在于，所述下壳体内设置有固定于所述下壳体的导热结构胶。
  10. 根据权利要求1所述的电池模组，其特征在于，所述电池模组还包括上盖，所述上盖与所述下壳体共同形成容置所述多个电池单体的容纳腔。
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