WO2021195964A1 - 电池组 - Google Patents

电池组 Download PDF

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Publication number
WO2021195964A1
WO2021195964A1 PCT/CN2020/082434 CN2020082434W WO2021195964A1 WO 2021195964 A1 WO2021195964 A1 WO 2021195964A1 CN 2020082434 W CN2020082434 W CN 2020082434W WO 2021195964 A1 WO2021195964 A1 WO 2021195964A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
battery pack
battery
packaging film
wall
Prior art date
Application number
PCT/CN2020/082434
Other languages
English (en)
French (fr)
Inventor
覃磊
李长江
曹国强
唐富忠
Original Assignee
东莞新能安科技有限公司
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 东莞新能安科技有限公司 filed Critical 东莞新能安科技有限公司
Priority to PCT/CN2020/082434 priority Critical patent/WO2021195964A1/zh
Priority to CN202080025810.6A priority patent/CN113728500B/zh
Publication of WO2021195964A1 publication Critical patent/WO2021195964A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H01M50/26—Assemblies sealed to each other in a non-detachable manner
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
    • 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 batteries, in particular to battery packs.
  • the current battery pack design is mainly constructed by fixing the battery cells through a bracket. In this way, when the battery pack is subjected to a mechanical external force (for example, collision, drop, etc.), the battery cell can easily collide with the support, thereby causing the battery cell to rupture.
  • a mechanical external force for example, collision, drop, etc.
  • a battery pack includes a battery cell module.
  • the battery cell module includes a plurality of stacked battery cell components.
  • the battery cell component includes a battery cell and a bracket that houses the battery cell.
  • a core body and a packaging film, the packaging film comprising a packaging film body and a top sealing edge, the packaging film body covering the battery core body, the packaging film body including a top surface, and the top sealing edge is defined by the top The surface extends out, and the battery cell assembly further includes:
  • the connecting body is arranged between the top sealing edge and the bracket.
  • the packaging film body further includes a bottom surface facing away from the top surface and a peripheral surface connected between the top surface and the bottom surface, and the connecting body also covers part of the top surface or/and part of the top surface. State the surface.
  • the connecting member is glue.
  • the battery pack further includes a seal, and the seal is disposed between two adjacent brackets.
  • the bracket includes a peripheral wall
  • the peripheral wall includes two oppositely arranged side walls, a top wall and a bottom wall
  • the two side walls are connected between the top wall and the bottom wall, and are arranged adjacent to each other.
  • the sealing element includes a first subsection, and the first subsection seals a part of the gap on a side close to the top wall.
  • the sealing member further includes a second sub-section, the second sub-section is provided on two side walls of the adjacently arranged bracket; the second sub-section and the first sub-section are connected to each other or Interval settings.
  • the support includes a peripheral wall, the peripheral wall includes two oppositely arranged side walls, a top wall and a bottom wall, the two side walls are connected between the top wall and the bottom wall, and the battery pack It also includes a sealing element, and the sealing element includes a second sub-part, and the second sub-part is arranged on two side walls of the adjacently arranged brackets.
  • the battery cell module further includes a first buffer member, and the first buffer member is disposed between two adjacent battery cell assemblies.
  • the battery cell further includes an adhesive member disposed between the packaging film body and the battery core body.
  • using the connecting body to fix the top sealing edge to the bracket can effectively increase the strength of the top of the battery cell, thereby avoiding the phenomenon of top sealing edge rupture caused by the shaking of the battery cell.
  • the strength of the top sealing edge portion can be further improved, thereby improving the overall mechanical strength and drop resistance of the battery core.
  • FIG. 1 is a schematic diagram of the structure of a battery pack according to an embodiment of the application.
  • Fig. 2 is a partial exploded schematic diagram of the battery pack shown in Fig. 1.
  • Fig. 3 is a partial exploded schematic diagram of the battery pack shown in Fig. 2.
  • FIG. 4A is a schematic diagram of the structure of a battery cell according to an embodiment of the application.
  • Fig. 4B is a schematic diagram of a part of the structure of the battery cell shown in Fig. 4A.
  • Fig. 5 is an exploded schematic diagram of a battery cell assembly according to an embodiment of the application.
  • FIG. 6 is a schematic diagram of a part of the structure of the battery pack shown in FIG. 1.
  • FIG. 7 is a schematic diagram of the structure of a stent according to an embodiment of the application.
  • the first buffer part 15 The first buffer part 15
  • the battery pack 100 includes a battery cell module 10, a steel belt 20, and two end plates 30 arranged opposite to each other.
  • the battery cell module 10 includes a plurality of stacked battery cell assemblies 11.
  • each cell assembly 11 includes a cell 12, a connecting body 13 and a bracket 14.
  • the battery cell 12 is housed in the bracket 14.
  • the cell 12 includes a cell body 121 and a packaging film 122.
  • the packaging film 122 includes a packaging film body 1221 and a top sealing edge 1222.
  • the packaging film body 1221 covers the cell body 121.
  • the packaging film body 1221 includes a top surface 1223, a bottom surface 1224 facing away from the top surface 1223, and a peripheral surface 1225 connected between the top surface 1223 and the bottom surface 1224.
  • the top sealing edge 1222 extends from the top surface 1223. Wherein, referring to FIG. 5, the top sealing edge 1222 separates the top surface 1223 into a first surface 1226 and a second surface 1227. That is, the first surface 1226 and the second surface 1227 are located on both sides of the top sealing edge 1222 respectively.
  • the battery cell 12 further includes an adhesive 123.
  • the adhesive 123 is disposed between the packaging film body 1221 and the battery core body 121.
  • a mechanical external force for example, collision, drop, etc.
  • the battery body 121 is not inside the packaging film body 1221 A relative deviation will occur, thereby effectively avoiding the phenomenon that the battery core body 121 breaks through the packaging film body 1221, thereby improving the overall mechanical strength of the battery core 12.
  • the connecting body 13 is provided between the top sealing edge 1222 and the bracket 14.
  • the connecting body 13 also covers part of the top surface 1223 or/and part of the peripheral surface 1225.
  • the battery cell 12 further includes a tab 124.
  • the tab 124 is connected to the cell body 121 and protrudes from the top sealing edge 1222.
  • the connecting body 13 can also cover a part of the tab 124 protruding from the top sealing edge 1222 to protect the tab 124.
  • the bracket 14 includes a peripheral wall 141 and a receiving portion 142 surrounded by the peripheral wall 141.
  • the accommodating portion 142 is used for accommodating the battery cell 12.
  • the peripheral wall 141 has a rectangular ring structure, and includes two oppositely arranged side walls 1411 and two oppositely arranged top walls 1412 and 1413.
  • the two side walls 1411 are connected between the top wall 1412 and the bottom wall 1413 to form the peripheral wall 141 with a rectangular ring structure.
  • the peripheral wall 141 may also be a circular ring structure, a diamond ring structure, a triangular ring structure, or the like.
  • the bracket 14 further includes a heat sink 143.
  • the heat sink 143 is disposed in the receiving portion 142 and connected to the peripheral wall 141 to divide the receiving portion 142 into two receiving portions 1421 arranged opposite to each other. Wherein, the battery cell 12 is accommodated in the first accommodating portion 1421.
  • the battery cell module 10 further includes a first buffer member 15.
  • the first buffer member 15 is disposed between two adjacent battery cell assemblies 11.
  • the arrangement of the first buffer member 15 provides a buffer and expansion space for the battery cell 12.
  • the first buffer member 15 is foam.
  • the steel belt 20 is surrounded on the outer surface of the battery cell module 10 to fix the battery cell module 10.
  • the two end plates 30 are respectively arranged on both sides of the battery cell module 10. Wherein, the two end plates 30 and the battery cell module 10 are fixed by the steel belt 20 together.
  • the steel strip 20 and/or the end plate 30 may be omitted according to actual conditions.
  • the battery pack 100 further includes a second buffer member 40.
  • the second buffer member 40 is disposed between the end plate 30 and the battery cell module 10 (combined with FIG. 1 and FIG. 3).
  • the second buffer member 40 is foam.
  • the battery pack 100 includes a battery cell module 10, a steel belt 20 and two end plates 30 arranged opposite to each other.
  • the battery cell module 10 includes a plurality of battery cell assemblies 11 stacked on top of each other.
  • Each cell assembly 11 includes a cell 12, a connecting body 13 and a bracket 14.
  • the battery core 12 is housed in the bracket 14.
  • the cell 12 includes a cell body 121 and a packaging film 122.
  • the packaging film 122 includes a packaging film body 1221 and a top sealing edge 1222.
  • the packaging film body 1221 covers the cell body 121.
  • the packaging film body 1221 includes a top surface 1223, a bottom surface 1224 facing away from the top surface 1223, and a peripheral surface 1225 connected between the top surface 1223 and the bottom surface 1224.
  • the top sealing edge 1222 extends from the top surface 1223. Wherein, the top sealing edge 1222 separates the top surface 1223 into a first surface 1226 and a second surface 1227.
  • the bracket 14 includes a peripheral wall 141, a receiving portion 142 surrounded by the peripheral wall 141, and a heat sink 143.
  • the peripheral wall 141 is a rectangular ring structure, and includes two oppositely arranged side walls 1411 and two oppositely arranged top walls 1412 and 1413.
  • the two side walls 1411 are connected between the top wall 1412 and the bottom wall 1413 to form the peripheral wall 141 with a rectangular ring structure.
  • the heat sink 143 is disposed in the receiving portion 142 and connected to the peripheral wall 141 to divide the receiving portion 142 into two receiving portions 1421 arranged opposite to each other.
  • the battery core 12 is disposed on the heat sink 143 and received in the receiving portion 1421. In this way, the first surface 1226, the top sealing edge 1222 and the heat sink 143 jointly surround the receiving space 144.
  • the connecting body 13 connects the top wall 1412 and the top sealing edge 1222, and is accommodated in the receiving space 144.
  • the fixing of the top sealing edge 1222 is realized by the arrangement of the connecting body 13, thereby effectively increasing the strength of the top of the battery cell 12 and the overall anti-drop performance of the battery pack 100, thereby avoiding the shaking of the battery cell 12.
  • the connecting body 13 is a silica gel strip.
  • the connecting body 13 connects the top wall 1412 and the top sealing edge 1222 by glue.
  • the steel belt 20 is surrounded on the outer surface of the battery cell module 10 to fix the battery cell module 10.
  • the two end plates 30 are respectively arranged on both sides of the battery cell module 10. Wherein, the two end plates 30 and the battery cell module 10 are fixed by the steel belt 20 together.
  • Embodiment 2 The difference between Embodiment 2 and Embodiment 1 lies in the structure of the connecting body 13.
  • the connecting body 13 connects the top wall 1412 and the top sealing edge 1222, and covers the first surface 1226 and a part of the circumference facing the side wall 1411 ⁇ 1225. In this way, with the help of the connecting body 13 to further cover the first surface 1226 and part of the peripheral surface 1225, the fixing of the top sealing edge 1222 is strengthened, thereby further increasing the strength of the top of the battery cell 12 and the overall battery pack 100 The anti-drop performance.
  • connecting body 13 can be further connected to the connecting body 13 on the adjacent battery cell assembly 11.
  • the connecting body 13 is glue.
  • the connecting body 13 is formed by a glue filling process. Specifically, the steps of the glue filling process are as follows: first, the glue is poured from the receiving space 144 so that the glue covers the first surface 1226 and part of the peripheral surface 1225, and makes the The top sealing edge 1222 is connected to the top wall 1412 of the bracket 14; then, the glue is cured to form the connecting body 13. Wherein, the battery cell 12 is bonded to the heat sink 143 of the bracket 14. In this way, when glue is poured into the receiving space 144, the glue will only flow to the peripheral surface 1225 facing the side wall 1411.
  • Embodiment 3 The difference between Embodiment 3 and Embodiment 2 is that the battery pack 100 in Embodiment 3 further includes a sealing member 16.
  • Embodiment 3 referring to FIG. 2, when a plurality of the battery cell assemblies 11 are stacked, a gap 1414 is formed between the side walls 1411 of the adjacently disposed brackets 14. Among them, due to the existence of the gap 1414, when the connecting body 13 is formed by pouring the glue, the glue easily overflows from the gap 1414, which causes a waste of glue.
  • the sealing member 16 is T-shaped and includes a first part 161 and a second part 162 connected to the first part 161.
  • the first sub-part 161 seals a part of the gap 1414 on the side close to the top wall 1412.
  • the second sub-part 162 is disposed on the two side walls 1411 of the adjacently disposed bracket 14 and faces the battery core 12. Wherein, the second sub-part 162 is substantially parallel to the top wall 1412 of the bracket 14.
  • first subsection 161 and the second subsection 162 are spaced apart.
  • the difference between the fourth embodiment and the third embodiment is that the sealing member 16 of the fourth embodiment only includes the first part 161.
  • the difference between the fifth embodiment and the third embodiment is that the sealing member 16 of the fifth embodiment only includes the second part 162.
  • Step 1 Put the battery 12 into the bracket 14 correspondingly.
  • Step two stack the brackets 14 with the battery cells 12 one by one. Wherein, when the brackets 14 are stacked, the sealing member 16 is also provided.
  • Step 3 The two end plates 30 are respectively arranged on both sides of the stacked bracket 14, and then the steel band 20 is used to fix them.
  • Step 4 Pouring glue on the top of the cells 12 so that the glue covers the first surface 1226 of each cell 12 and part of the peripheral surface 1225, and the top wall 1412 and the top edge are sealed 1222 is connected, thereby forming the connecting body 13.
  • the connecting body 13 is also connected to the connecting body 13 on the adjacently arranged battery core assembly 11 (refer to FIG. 2).
  • the connecting body 13 adjacent to the end plate 30 is also connected to the end plate 30 (refer to FIG. 3).
  • the connecting body 13 to fix the battery core 12 on the bracket 14 the battery core 12 can also be effectively prevented from being damaged due to the impact of the external force on the bracket 14.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电池组，包括电芯模组。所述电芯模组包括多个堆叠设置的电芯组件。所述电芯组件包括电芯、收容所述电芯的支架及连接体。所述电芯包括电芯本体及包装膜。所述包装膜包括包装膜本体和顶封边。所述包装膜本体包覆所述电芯本体。所述包装膜本体包括顶面，所述顶封边由所述顶面延伸出。所述连接体设于所述顶封边和所述支架之间。本申请中的电池组利用连接体将顶封边固定于支架，加强了电芯顶部的机械强度，从而有效避免出现因电芯晃动等状况所导致的顶封边破裂的现象。

Description

电池组 技术领域
本申请涉及电池领域，具体涉及电池组。
背景技术
目前的电池组设计主要是通过支架固定电芯的方式构成。如此，当电池组受到机械外力(例如：碰撞、跌落等)作用时，电芯极易与支架发生碰撞，从而导致电芯受力破裂。
发明内容
有鉴于此，有必要提供一种电池组，以解决电池组抗跌落性能差的问题。
一种电池组，包括电芯模组，所述电芯模组包括多个堆叠设置的电芯组件，所述电芯组件包括电芯及收容所述电芯的支架，所述电芯包括电芯本体及包装膜，所述包装膜包括包装膜本体和顶封边，所述包装膜本体包覆所述电芯本体，所述包装膜本体包括顶面，所述顶封边由所述顶面延伸出，所述电芯组件还包括：
连接体，设于所述顶封边和所述支架之间。
可选地，所述包装膜本体还包括背对所述顶面的底面及连接于所述顶面和底面之间的周面，所述连接体还覆盖部分所述顶面或/和部分所述周面。
可选地，所述连接件为胶水。
可选地，所述电池组还包括密封件，所述密封件设置于相邻的两支架之间。
可选地，所述支架包括周壁，所述周壁包括两相对设置的侧壁、顶壁和底壁，两所述侧壁连接于所述顶壁和所述底壁之间，相邻设置的支架的侧壁之间具有缝隙，所述密封件密封部分或全部的所述缝隙。
可选地，所述密封件包括第一分部，所述第一分部密封靠近所述顶壁一侧的部分所述缝隙。
可选地，所述密封件还包括第二分部，所述第二分部设置于相邻设置的支架的两侧壁上；所述第二分部和所述第一分部相互连接或间隔设置。
可选地，所述支架包括周壁，所述周壁包括两相对设置的侧壁、顶壁和底壁，两所述侧壁连接于所述顶壁和所述底壁之间，所述电池组还包括密封件，所述密封件包括第二分部，所述第二分部设置于相邻设置的支架的两侧壁上。
可选地，所述电芯模组还包括第一缓冲件，所述第一缓冲件设置于相邻的两电芯组件之间。
可选地，所述电芯还包括粘接件，所述粘接件设置于所述包装膜本体和所述电芯本体之间。
综上所述，利用连接体将顶封边固定于支架，可有效增加电芯顶部的强度，从而避免出现因电芯晃动等状况所导致的顶封边破裂的现象。此外，通过连接体进一步覆盖部分所述顶面或/和部分所述周面可进一步提高所述顶封边部分的强度，进而提高所述电芯整体的机械强度及抗跌落性能。
附图说明
图1为本申请一实施方式的电池组的结构示意图。
图2为图1所示电池组的部分分解示意图。
图3为图2所示电池组的部分分解示意图。
图4A为本申请一实施方式的电芯的结构示意图。
图4B为图4A所示电芯的部分结构示意图。
图5为本申请一实施方式的电芯组件的分解示意图。
图6为图1所示电池组的部分结构示意图。
图7为本申请一实施方式的支架的结构示意图。
主要元件符号说明
电池组                      100
电芯模组                    10
电芯组件                    11
电芯                        12
电芯本体                    121
包装膜                      122
包装膜本体                  1221
顶封边                      1222
顶面                        1223
底面                        1224
周面                        1225
第一表面                    1226
第二表面                    1227
粘接件                      123
极耳                        124
连接体                      13
支架                        14
周壁                        141
侧壁                        1411
顶壁                        1412
底壁                        1413
缝隙                        1414
容置部                      142
收容部                      1421
散热片                      143
收容空间                    144
第一缓冲件                  15
密封件                      16
第一分部                    161
第二分部                    162
钢带                         20
端板                         30
第二缓冲件                   40
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅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。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。
下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
参阅图1，本申请实施方式提供了一种电池组100。所述电池组100包括电芯模组10、钢带20及两背对设置的端板30。
参阅图2，所述电芯模组10包括多个堆叠设置的电芯组件11。
请一并参阅图3，每一电芯组件11包括电芯12、连接体13及支架14。
所述电芯12收容于所述支架14。在本实施方式中，参阅图4A和图4B，所述电芯12包括电芯本体121及包装膜122。所述包装膜122包括包装膜本体1221及顶封边1222。所述包装膜本体1221包覆所述电芯本体121。所述包装膜本体1221包括顶面1223、背对所述顶面1223的底面1224及连接于所述顶面1223和所述底面1224之间的周面1225。所述顶封边1222由所述顶面1223延伸出。其中，结合图5，所述顶封边1222将所述顶面1223分隔成第一表面1226 及第二表面1227。即所述第一表面1226和所述第二表面1227分别位于所述顶封边1222的两侧。
进一步地，参图4A和图4B，所述电芯12还包括粘接件123。所述粘接件123设置于所述包装膜本体1221和所述电芯本体121之间。如此，当所述电池组100受到机械外力(例如：碰撞、跌落等)的作用时，由于所述粘接件123的设置，使得所述电芯本体121在所述包装膜本体1221的内部不会发生相对偏移，从而有效避免出现所述电芯本体121冲破包装膜本体1221的现象，进而提高了所述电芯12整体的机械强度。
一实施方式中，参图5，所述连接体13设于所述顶封边1222和所述支架14之间。
进一步地，在本实施方式中，参图3和图4A，所述连接体13还覆盖部分所述顶面1223或/和部分所述周面1225。
参图4A和图4B，所述电芯12还包括极耳124。所述极耳124连接所述电芯本体121，并由所述顶封边1222内伸出。其中，所述连接体13还可包覆部分伸出所述顶封边1222的极耳124，以保护所述极耳124。
参图7，所述支架14包括周壁141及由所述周壁141围成的容置部142。所述容置部142用于收容所述电芯12。
在本实施方式中，参图7，所述周壁141为矩形环状结构，包括两相对设置的侧壁1411及两相对设置的顶壁1412和底壁1413。两所述侧壁1411连接于所述顶壁1412和所述底壁1413之间，以形成具矩形环状结构的所述周壁141。
在其他实施方式中，所述周壁141还可以是圆形环状结构、菱形环状结构、三角形环状结构等。
参图7，所述支架14还包括散热片143。所述散热片143设置于所述容置部142内，并连接所述周壁141，以将所述容置部142分隔成两背对设置的收容部1421。其中，所述电芯12收容于第一收容部1421。
进一步地，参图2，所述电芯模组10还包括第一缓冲件15。所述第一缓冲件15设置于相邻的两电芯组件11之间。所述第一缓冲件15的设置为所述电芯12提供缓冲和膨胀的空间。其中，一实施方式中，所述第一缓冲件15为泡棉。
参图1，所述钢带20围设于所述电芯模组10的外表面，以固定所述电芯模组10。
两所述端板30分别设置于所述电芯模组10两侧。其中，两所述端板30和所述电芯模组10一起由所述钢带20进行固定。
在其他实施方式中，所述钢带20和/或所述端板30可依实际情况省略。
进一步地，参图3，所述电池组100还包括第二缓冲件40。所述第二缓冲件40设置于所述端板30和所述电芯模组10之间(结合图1和图3)。一实施方式中，所述第二缓冲件40为泡棉。
下面通过实施例对本申请的电池组100进行具体说明。
实施例1
参图1、图4A、图4B和图5，所述电池组100包括电芯模组10、钢带20及两背对设置的端板30。所述电芯模组10包括多个堆叠设置的电芯组件11。每一电芯组件11包括电芯12、连接体13及支架14。
参图4A和图4B，所述电芯12收容于所述支架14内。在实施例1中，所述电芯12包括电芯本体121及包装膜122。所述包装膜122包括包装膜本体1221及顶封边1222。所述包装膜本体1221包覆所述电芯本体121。所述包装膜本体1221包括顶面1223、背对所述顶面1223的底面1224及连接于所述顶面1223和所述底面1224之间的周面1225。所述顶封边1222由所述顶面1223延伸出。其中，所述顶封边1222将所述顶面1223分隔成第一表面1226及第二表面1227。
参图7，所述支架14包括周壁141、由所述周壁141围成的容置部142及散热片143。
在实施例1中，所述周壁141为矩形环状结构，包括两相对设置的侧壁1411及两相对设置的顶壁1412和底壁1413。两所述侧壁1411连接于所述顶壁1412和所述底壁1413之间，以形成具矩形环状结构的所述周壁141。
所述散热片143设置于所述容置部142内，并连接所述周壁141，以将所述容置部142分隔成两个背对设置的收容部1421。所述电芯12设置于所述散热片143，并收容于所述收容部1421。如此，所述第一表面1226、所述顶封边1222及所述散热片143共同围绕形成收容空间144。
参图5，所述连接体13连接所述顶壁1412和所述顶封边1222，并容置于所述收容空间144。如此，通过所述连接体13的设置实现了对所述顶封边1222的固定，从而有效增加电芯12顶部的强度及电池组100整体的抗跌性能，进而避免出现因电芯12晃动等状况所导致的顶封边1222破裂的现象。在实施例1中，所述连接体13为硅胶条。所述连接体13通过粘胶连接所述顶壁1412和所述顶封边1222。
参图1，所述钢带20围设于所述电芯模组10的外表面，以固定所述电芯模组10。
两所述端板30分别设置于所述电芯模组10两侧。其中，两所述端板30和所述电芯模组10一起由所述钢带20进行固定。
实施例2
实施例2与实施例1的区别在于连接体13的结构。
在实施例2中，参图3和图4A，所述连接体13连接所述顶壁1412和所述顶封边1222，并覆盖所述第一表面1226及朝向所述侧壁1411的部分周面1225。如此，借助所述连接体13进一步覆盖所述第一表面1226及部分所述周面1225，加强了对所述顶封边1222的固定，从而进一步增加电芯12顶部的强度及电池组100整体的抗跌性能。
进一步地，所述连接体13还可进一步连接相邻设置的电芯组件11上的连接体13。
在实施例2中，所述连接体13为胶水。所述连接体13通过灌胶工艺形成。具体地，所述灌胶工艺的步骤为：首先，将所述胶水由所述收容空间144灌入，以使所述胶水覆盖所述第一表面1226及部分所述周面1225，并使所述顶封边1222和所述支架14的顶壁1412连接；接着，固化胶水，以形成所述连接体13。其中，所述电芯12粘接于所述支架14的散热片143上，如此，当胶水由所述收容空间144灌入时，胶水只会流向朝向所述侧壁1411的周面1225。
实施例3
实施例3与实施例2的区别在于，实施例3中的电池组100还包括密封件16。
在实施例3中，参图2，当多个所述电芯组件11堆叠设置时，相邻设置的支架14的侧壁1411之间形成缝隙1414。其中，由于缝隙1414的存在，在灌胶形成所述连接体13时，胶水极易从缝隙1414溢出而造成胶水的浪费。
在实施例3中，结合图2和图7，所述密封件16呈T型，包括第一分部161及连接所述第一分部161的第二分部162。所述第一分部161密封靠近所述顶壁1412一侧的部分缝隙1414。所述第二分部162设置于相邻设置的支架14的两侧壁1411上，并朝向所述电芯12。其中，所述第二分部162与所述支架14的顶壁1412大致平行。如此，当对堆叠设置的电芯组件11进行灌胶时，所述第一分部161的设置可避免胶水从缝隙1414中溢出而造成浪费；所述第二分部162的设置可阻止胶水无限制向底壁1413方向流动，从而有效避免胶水的浪费。
在其他实施方式中，所述第一分部161和所述第二分部162间隔设置。
实施例4
实施例4与实施例3的区别在于，实施例4的密封件16仅包括第一分部161。
实施例5
实施例5与实施例3的区别在于，实施例5的密封件16仅包括第二分部162。
下面将简述实施例2中的电池组100的装配步骤，具体如下：
步骤一，将电芯12对应装入支架14中。
步骤二，将装有电芯12的支架14依次堆叠设置。其中，在堆叠设置支架14时，一并设置密封件16。
步骤三，将两所述端板30分别设置于堆叠设置的支架14的两侧，再利用钢带20将其固定。
步骤四，于所述电芯12的顶部进行灌胶，以使得胶水覆盖每一电芯12的第一表面1226及部分所述周面1225，并使所述顶壁1412和所述顶封边1222连接，从而形成所述连接体13。其中，借助胶水的粘性，所述连接体13还一并连接相邻设置的电芯组件11上的连接体13(参图2)。此外，邻近所述端板30的连接体13还连接所述端板30(参图3)。其中，借助所述连接体13将电芯12固定于所述支架14上，还可有效避免电芯12因外力作用撞击支架14而损坏的问题。
以上实施例仅用以说明本申请的技术方案而非限制，尽管参照较佳实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换，而不脱离本申请技术方案的精神和实质。

Claims (10)

  1. 一种电池组，包括电芯模组，所述电芯模组包括多个堆叠设置的电芯组件，所述电芯组件包括电芯及收容所述电芯的支架，所述电芯包括电芯本体及包装膜，所述包装膜包括包装膜本体和顶封边，所述包装膜本体包覆所述电芯本体，所述包装膜本体包括顶面，所述顶封边由所述顶面延伸出，其特征在于，所述电芯组件还包括：
    连接体，设于所述顶封边和所述支架之间。
  2. 如权利要求1所述的电池组，其特征在于，所述包装膜本体还包括背对所述顶面的底面及连接于所述顶面和底面之间的周面，所述连接体还覆盖部分所述顶面或/和部分所述周面。
  3. 如权利要求1或2所述的电池组，其特征在于，所述连接件为胶水。
  4. 如权利要求3所述的电池组，其特征在于，所述电池组还包括密封件，所述密封件设置于相邻的两支架之间。
  5. 如权利要求4所述的电池组，其特征在于，所述支架包括周壁，所述周壁包括两相对设置的侧壁、顶壁和底壁，两所述侧壁连接于所述顶壁和所述底壁之间，相邻设置的支架的侧壁之间具有缝隙，所述密封件密封部分或全部的所述缝隙。
  6. 如权利要求5所述的电池组，其特征在于，所述密封件包括第一分部，所述第一分部密封靠近所述顶壁一侧的部分所述缝隙。
  7. 如权利要求6所述的电池组，其特征在于，所述密封件还包括第二分部，所述第二分部设置于相邻设置的支架的两侧壁上；所述第二分部和所述第一分部相互连接或间隔设置。
  8. 如权利要求3所述的电池组，其特征在于，所述支架包括周壁，所述周壁包括两相对设置的侧壁、顶壁和底壁，两所述侧壁连接于所述顶壁和所述底壁之间，所述电池组还包括密封件，所述密封件包括第二分部，所述第二分部设置于相邻设置的支架的两侧壁上。
  9. 如权利要求1或2所述的电池组，其特征在于，所述电芯模组还包括第一缓冲件，所述第一缓冲件设置于相邻的两电芯组件之间。
  10. 如权利要求1或2中所述的电池组，其特征在于，所述电芯还 包括粘接件，所述粘接件设置于所述包装膜本体和所述电芯本体之间。
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