WO2022133862A1 - 电池组及应用所述电池组的用电装置 - Google Patents

电池组及应用所述电池组的用电装置 Download PDF

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Publication number
WO2022133862A1
WO2022133862A1 PCT/CN2020/138857 CN2020138857W WO2022133862A1 WO 2022133862 A1 WO2022133862 A1 WO 2022133862A1 CN 2020138857 W CN2020138857 W CN 2020138857W WO 2022133862 A1 WO2022133862 A1 WO 2022133862A1
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Prior art keywords
main plane
battery pack
cell
battery
adhesive layer
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PCT/CN2020/138857
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English (en)
French (fr)
Inventor
唐徐情
韩翔龙
谈时
陈宇
Original Assignee
宁德新能源科技有限公司
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Application filed by 宁德新能源科技有限公司 filed Critical 宁德新能源科技有限公司
Priority to CN202080097165.9A priority Critical patent/CN115136402B/zh
Priority to PCT/CN2020/138857 priority patent/WO2022133862A1/zh
Publication of WO2022133862A1 publication Critical patent/WO2022133862A1/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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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 batteries, and in particular, to a battery pack and an electrical device using the battery pack.
  • the present application also needs to provide an electrical device using the above-mentioned battery pack.
  • a battery pack of the present application includes a plurality of stacked cell assemblies, wherein the cell assemblies include cells and a bracket for accommodating the cells.
  • the battery cell includes a first main plane, a second main plane opposite to the first main plane, and a peripheral surface connecting the first main plane and the second main plane.
  • the battery core assembly further includes a buffer layer and an adhesive layer, the buffer layer is arranged between the first main plane of the battery core and the second main plane of another adjacent battery core; the adhesive layer Covering the peripheral surface and extending from the peripheral surface to the first main plane and the second main plane, and bonding the support and the battery core.
  • the thickness of the adhesive layer extending from the peripheral surface to the first main plane and the second main plane is respectively a
  • the thickness of the buffer layer is b
  • the thickness of the battery is b.
  • the thickness of the core is c
  • the expansion rate of the battery core is d%
  • the battery pack satisfies the following conditions: a ⁇ b-c*d%.
  • the adhesive layer is spaced from the buffer layer.
  • the width of the adhesive layer extending inward from the peripheral surface is 5 mm to 10 mm.
  • the material of the adhesive layer is selected from at least one of epoxy resin, polyurethane resin and organic silica gel.
  • the viscosity between the adhesive layer and the bracket is greater than 0.6 kgf/in.
  • the viscosity between the buffer layer and the battery core is greater than 0.5 kgf/in.
  • a plurality of buffer layers arranged at intervals are provided on the first main plane or the second main plane.
  • An electrical device of the present application includes the above-mentioned battery pack.
  • the battery pack of the present application through the cooperation of the buffer layer and the adhesive layer, can effectively reduce the movement of the cells in the battery pack when the battery pack is subjected to an external force, and at the same time reduce the impact of the external force on the cells.
  • the adhesive layer extends from the peripheral surface to the first main plane and the second main plane respectively, which increases the bonding area between the adhesive layer and the battery core, and can be used when the battery pack is subjected to external force. The risk of tearing of the casing is reduced, thereby improving the safety and stability of the battery pack.
  • the thickness of the buffer layer is still larger than the thickness of the adhesive layer extending from the peripheral surface to the first main plane and the second main plane, that is, the thickness of the buffer layer is still larger than the thickness of the first main plane arranged on the cell.
  • the thickness of the adhesive layer of the first main plane and the second main plane is beneficial to reduce the risk of direct extrusion and deformation of the battery cells after expansion, and is beneficial to improve the safety and stability of the battery pack.
  • FIG. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application.
  • FIG. 2 is a partially disassembled schematic diagram of a battery pack according to an embodiment of the present application.
  • FIG. 3 is a schematic disassembly diagram of a cell assembly according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a battery cell according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an electrode assembly according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a battery cell according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a battery cell according to another embodiment of the present application.
  • FIG. 8 is a schematic cross-sectional view of a cell according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a battery cell according to another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a stent according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of an electrical device according to an embodiment of the present application.
  • Electrode assembly 111 case 113 first principal plane 1131 second principal plane 1133 peripheral surface 1135 containment space 1130 top edge 1136
  • peripheral wall 130 accommodating cavity 131 Partition plate 133 Containment Department 135 Electrical device 200
  • an embodiment of the present application provides a battery pack 100 .
  • the battery pack 100 includes a cell module 10 , a fixing member 30 and two end plates 50 arranged opposite to each other.
  • the two end plates 50 are disposed on opposite sides of the cell module 10 , and the fixing member 30 fixes the cell module 10 between the two end plates 50 .
  • the cell module 10 includes a plurality of stacked cell assemblies 101 .
  • each cell assembly 101 includes a cell 11 , a bracket 13 , a buffer layer 15 and an adhesive layer 17 .
  • the battery cell 11 is accommodated in the bracket 13 .
  • the battery cell 11 includes an electrode assembly 111 and a casing 113 .
  • the housing 113 includes a first main plane 1131 , a second main plane 1133 opposite to the first main plane 1131 , and a circumference connecting the first main plane 1131 and the second main plane 1133 . face 1135.
  • the peripheral surface 1135, the first main plane 1131 and the second main plane 1133 surround the receiving space 1130 (as shown in FIG. 8 ) for receiving the electrode assembly 111 .
  • the casing 113 further includes a top sealing edge 1136 , and the top sealing edge 1136 is disposed on the peripheral surface 1135 .
  • a plurality of the cell assemblies 101 are stacked along a direction perpendicular to the first main plane 1131 or the second main plane 1133 .
  • the buffer layer 15 is provided with the first main plane 1131 and the second main plane 1133 , so that when the plurality of cell components 101 are stacked, they are pressed against two adjacent ones. between the cells 11 of the battery cell assembly 101, so as to help reduce the movement of the cells 11 when the battery pack is subjected to external force, and the buffer layer 15 can also be affected by the external force (eg drop, impact) when the battery pack is affected. It protects the battery cell 11 and reduces the impact of external force on the battery cell 11.
  • the external force eg drop, impact
  • the viscosity between the buffer layer 15 and the casing 113 is greater than 0.5 kgf/in.
  • the buffer layer 15 may be, but not limited to, foam.
  • one buffer layer 15 is provided on the first main plane 1131 or the second main plane 1133 of each battery cell 11 .
  • the first main plane 1131 or the second main plane 1133 may be provided with a plurality of the buffer layers 15 arranged at intervals.
  • the first main plane 1131 or Two buffer layers 15 are arranged on the second main plane 1133 side by side and spaced apart.
  • the adhesive layer 17 covers the peripheral surface 1135 of the cell 11 and extends from the peripheral surface 1135 to the first main plane 1131 and the second main plane 1131 respectively. Main plane 1133.
  • the adhesive layer 17 is also bonded to the bracket 13 accommodating the battery cell 11 , thereby fixing the battery core 11 and the bracket 13 , thereby preventing the
  • the battery cells 11 move in the bracket 13, and the adhesive layer 17 can also protect the battery cells 11 when the battery pack is subjected to external force (eg, falling, impact), and reduce the impact of external force on the battery cells. 11 shocks.
  • the adhesive layer 17 extends from the peripheral surface 1135 to the first main plane 1131 and the second main plane 1133 respectively, which increases the bonding area between the adhesive layer 17 and the battery core 11 and can When the battery pack is subjected to external force, the risk of tearing of the casing 113 is reduced.
  • the thickness of the adhesive layer 17 on the first main plane 1131 of the cell 11 and the thickness of the adhesive layer 17 on the second main plane 1133 of the cell 11 The thickness of the adhesive layer 17 is a, the thickness of the buffer layer 15 is b, the thickness of the battery core 11 is c, and the expansion rate of the battery core 11 is d%.
  • the battery The group 100 may also satisfy the following condition: a ⁇ b-c*d%.
  • the thickness of the buffer layer 15 is still larger than the thickness of the adhesive layer 17 disposed on the first main plane 1131 and the second main plane 1133 of the cell 11 respectively, which is beneficial to reduce The risk of directly squeezing and deforming the cells after expansion is beneficial to improve the safety and stability of the battery pack.
  • the adhesive layer 17 is spaced from the buffer layer 15 .
  • the width w of the adhesive layer 17 extending inward from the peripheral surface 1135 is 5 mm ⁇ 10 mm.
  • the width of the adhesive layer 17 extending inward from any area of the peripheral surface 1135 is the same, so that the distribution of the interaction force between the adhesive layer 17 and the battery core 11 is more uniform, so that the When the battery pack is subjected to external force, the risk of tearing of the casing 113 is further reduced.
  • the material of the adhesive layer 17 can be selected from at least one of epoxy resin, polyurethane resin and organic silica gel.
  • the viscosity between the adhesive layer 17 and the bracket 13 is greater than 0.6 kgf/in.
  • the material of the adhesive layer 17 may not be limited to the above range.
  • the adhesive layer 17 can be in contact with the buffer layer 15 so as to cover the battery core 11 .
  • the bracket 13 includes an annular peripheral wall 130 and a accommodating cavity 131 surrounded by the peripheral wall 130 .
  • the battery cell 11 is accommodated in the accommodating cavity 131 , and the adhesive layer 17 disposed on the battery core 11 is bonded to the peripheral wall 130 , thereby fixing the battery core 11 to the surrounding wall 130 . into the accommodating cavity 131 .
  • the bracket 13 may further include a partition plate 133 , the partition plate 133 is disposed in the accommodating cavity 131 , and the peripheral edge of the partition plate 133 is connected to the peripheral wall 130 , thereby
  • the accommodating cavity 131 is divided into two accommodating parts 135, wherein the battery cell 11 is accommodated in each accommodating part 135, and the first main plane 1131 or the second main plane 1133 of the battery cell 11 faces
  • the partition plate 133 makes the buffer layer 15 on the first main plane 1131 or the second main plane 1133 facing the partition plate 133 abut against the partition plate 133, so as to facilitate the operation of the battery pack. When the external force is applied, the play of the battery cell 11 is reduced.
  • the separator 133 can be a heat sink, which is beneficial to improve the heat dissipation efficiency of the battery pack.
  • the fixing member 30 may be in a ring-shaped structure, and the fixing member 30 is sleeved on the end plate 50 and the cell module 10 which are stacked in layers to connect the cell module 10 It is fixed between the two end plates 50 .
  • the fixing member 30 may be a steel belt.
  • the fixing member 30 is not limited to a steel band, but can also be made of other materials such as an annular plastic that is not easily broken. In some embodiments, the fixing member 30 may also have other structures, not limited to the annular structure, and it is only necessary to ensure that the cell module 10 is fixed.
  • the end plate 50 can also be omitted as required.
  • the above-mentioned battery pack 100 is applied to an electrical device 200 to provide electrical energy for the electrical device 200 .
  • the electrical device 200 can be, but not limited to, a car, a computer, an electric toy, a drone, and the like.
  • the battery pack 100 of the present application through the cooperation of the buffer layer 15 and the adhesive layer 17 , can effectively reduce the movement of the cells 11 in the battery pack when the battery pack 100 is subjected to an external force, and at the same time reduce the impact of the external force on the battery pack 100 .
  • the adhesive layer 17 extends from the peripheral surface 1135 to the first main plane 1131 and the second main plane 1133 respectively, which increases the bonding area between the adhesive layer 17 and the battery core 11 and can When the battery pack is subjected to external force, the risk of tearing of the casing 113 is reduced.

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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（100）及应用该电池组（100）的用电装置（200），电池组（100）包括多个堆叠设置的电芯组件（101），电芯组件（101）包括电芯（11）及收容电芯（11）的支架（13）。电芯（11）包括第一主平面（1131）、与第一主平面（1131）相背的第二主平面（1133）以及连接第一主平面（1131）和第二主平面（1133）的周面（1135）。电芯组件（101）还包括缓冲层（15）和胶层（17），缓冲层（15）设置于电芯（11）的第一主平面（1131）和相邻的另一电芯（11）的第二主平面（1133）之间；胶层（17）包覆周面（1135）并从周面（1135）延伸至第一主平面（1131）和第二主平面（1133），粘结支架（13）和电芯（11）。

Description

电池组及应用所述电池组的用电装置 技术领域
本申请涉及电池领域，尤其涉及一种电池组及一种应用所述电池组的用电装置。
背景技术
随着消费类电子产品的成熟应用，客户对整机应用风险越来越关注。例如，对电子产品抗跌落的要求越来越高。而电池作为电子产品的重要组成部分，同样对抗跌落具有要求。电池随着电子产品跌落时，容易被收容于电池封装膜内电芯冲开所述封装膜的顶封或侧封，从而影响电池的安全性及使用寿命。
发明内容
鉴于上述情况，本申请有必要提供一种提高电池安全性及稳定性的电池组。
另外，本申请还有必要提供一种应用上述电池组的用电装置。
本申请的一种电池组，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。所述电芯包括第一主平面、与所述第一主平面相背的第二主平面以及连接所述第一主平面和所述第二主平面的周面。所述电芯组件还包括缓冲层和胶层，所述缓冲层设置于所述电芯的第一主平面和相邻的另一所述电芯的第二主平面之间；所述胶层包覆所述周面并从所述周面延伸至所述第一主平面和所述第二主平面，并粘结所述支架粘结和所述电芯。沿所述电芯的厚度方向，从所述周面延伸至所述第一主平面和所述第二主平面的胶层的厚度分别为a，所述缓冲层的厚度为b，所述电芯的厚度为c，所述电芯的膨胀率为d％，所述电池组满足以下条件：a＜b-c﹡d％。
作为本申请的一种方案，所述缓冲层的不可压缩率为e％，所述电池组 进一步地满足以下条件：b﹡(1-e％)＝c﹡d％。
作为本申请的一种方案，所述胶层与所述缓冲层间隔。
作为本申请的一种方案，在所述第一主平面或所述第二主平面上，所述胶层自所述周面向内延伸的宽度为5mm～10mm。
作为本申请的一种方案，所述胶层的材料选自环氧树脂、聚氨酯树脂和有机硅胶中的至少一种。
作为本申请的一种方案，所述胶层与所述支架间的粘性大于0.6kgf/in。
作为本申请的一种方案，所述缓冲层与所述电芯间的粘性大于0.5kgf/in。
作为本申请的一种方案，所述第一主平面或所述第二主平面上设有多个间隔设置的缓冲层。
本申请的一种用电装置，所述用电装置包括如上所述的电池组。
本申请的电池组，其通过缓冲层和胶层的配合，能够在所述电池组受到外力作用时有效地降低电池组中电芯的窜动，同时降低外力作用对所述电芯的冲击。另外，所述胶层从所述周面分别延伸至所述第一主平面和所述第二主平面，增加了胶层与所述电芯的粘结面积，能够在电池组受到外力作用时降低所述壳体撕裂的风险，从而提高所述电池组的安全性和稳定性。且在电芯膨胀压缩后，缓冲层的厚度仍分别大于从周面延伸至第一主平面和第二主平面的胶层的厚度，即，缓冲层的厚度仍分别大于设置于电芯的第一主平面和第二主平面的胶层的厚度，从而有利于降低电芯膨胀后直接相互挤压变形的风险，有利于提高电池组的安全性和稳定性。
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为本申请一实施方式的电池组的部分拆解示意图。
图3为本申请一实施方式的电芯组件的拆解示意图。
图4为本申请一实施方式的电芯的结构示意图。
图5为本申请一实施方式的电极组件的结构示意图。
图6为本申请一实施方式的电芯的结构示意图。
图7为本申请另一实施方式的电芯的结构示意图。
图8为本申请一实施方式的电芯的剖面示意图。
图9为本申请又一实施方式的电芯的结构示意图。
图10为本申请一实施方式的支架的结构示意图。
图11为本申请一实施方式的用电装置的结构示意图。
主要元件符号说明
电池组 100
电芯模组 10
固定件 30
端板 50
电芯组件 101
电芯 11
支架 13
缓冲层 15
胶层 17
电极组件 111
壳体 113
第一主平面 1131
第二主平面 1133
周面 1135
收容空间 1130
顶封边 1136
周壁 130
容置腔 131
分隔板 133
收容部 135
用电装置 200
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。
请参阅图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、固定件30及两个相背设置的端板50。两个所述端板50设置于所述电芯模组10的相背的两侧，所述固定件30将所述电芯模组10固定于两个所述端板50之间。
请参阅图2，所述电芯模组10包括多个堆叠设置的电芯组件101。
请同时参阅图3，每个电芯组件101包括电芯11、支架13、缓冲层15和胶层17。
所述电芯11收容于所述支架13中。请参阅图4和图5，所述电芯11包括电极组件111和壳体113。所述壳体113包括第一主平面1131、与所述第一主平面1131相背的第二主平面1133、以及连接所述第一主平面1131和所 述第二主平面1133之间的周面1135。所述周面1135与所述第一主平面1131和所述第二主平面1133围设形成收容所述电极组件111的收容空间1130(如图8所示)。请结合图4，所述壳体113还包括顶封边1136，所述顶封边1136设置于所述周面1135上。
请参阅图2，多个所述电芯组件101沿垂直于所述第一主平面1131或所述第二主平面1133的方向堆叠。
请结合图2、图6和图8，所述缓冲层15设置所述第一主平面1131和所述第二主平面1133，以在多个电芯组件101堆叠时，抵持于两相邻的电芯组件101的电芯11之间，从而有利于在电池组受到外力作用时降低电芯11的窜动，并且所述缓冲层15还可在电池组受到外力作用(例如跌落、撞击)时保护电芯11，降低外力作用对电芯11的冲击。
在本实施方式中，优选的，所述缓冲层15与所述壳体113之间的粘性大于0.5kgf/in。
在一些实施方式中，所述缓冲层15可为但不仅限于泡棉。
如图7所示，每个所述电芯11的第一主平面1131或第二主平面1133设有一个所述缓冲层15。在一些实施方式中，所述第一主平面1131或所述第二主平面1133上可设有多个间隔设置的所述缓冲层15，例如图6所示，所述第一主平面1131或所述第二主平面1133上并排且间隔设置两个缓冲层15。
请结合图3、图6和图8，所述胶层17包覆所述电芯11的周面1135，并从所述周面1135分别延伸至所述第一主平面1131和所述第二主平面1133。在所述电芯11收容于所述支架13中时，所述胶层17还与收容所述电芯11的支架13粘结，从而将所述电芯11与所述支架13固定，进而避免电池组受到外力作用时所述电芯11在支架13中窜动，并且所述胶层17还可在电池组受到外力作用(例如跌落、撞击)时保护电芯11，降低外力作用对电芯11的冲击。另外，所述胶层17从所述周面1135分别延伸至所述第一主平面1131和所述第二主平面1133，增加了胶层17与所述电芯11的粘 结面积，能够在电池组受到外力作用时降低所述壳体113撕裂的风险。
请参阅图8，沿所述电芯11的厚度方向，在所述电芯11的第一主平面1131的所述胶层17的厚度以及在所述电芯11的第二主平面1133的所述胶层17的厚度分别为a，所述缓冲层15的厚度为b，所述电芯11的厚度为c，所述电芯11的膨胀率d％，在本实施方式中，所述电池组100还可满足以下条件：a＜b-c﹡d％。在所述电芯11膨胀压缩后，所述缓冲层15的厚度仍分别大于设置于所述电芯11的第一主平面1131和第二主平面1133的胶层17的厚度，从而有利于降低电芯膨胀后直接相互挤压变形的风险，有利于提高电池组的安全性和稳定性。
所述缓冲层15的不可压缩率为e％，所述电池组100还可进一步地满足以下条件：b﹡(1-e％)＝c﹡d％。
在本实施方式中，如图8所示，所述胶层17与所述缓冲层15间隔。优选的，在所述第一主平面1131或所述第二主平面1133上，所述胶层17自所述周面1135向内延伸的宽度w为5mm～10mm。
优选的，所述胶层17自所述周面1135任意区域向内延伸的宽度均相同，从而使得所述胶层17与所述电芯11之间的相互作用力分布的更加均匀，以在电池组受到外力作用时进一步地降低所述壳体113撕裂的风险。
在本实施方式中，所述胶层17的材料可选自环氧树脂、聚氨酯树脂和有机硅胶中的至少一种。优选的，所述胶层17与所述支架13之间的粘性大于0.6kgf/in。在一些实施方式中，所述胶层17的材料可不仅限于上述范围。
在一些实施方式中，如图9所示，所述胶层17可与所述缓冲层15相接，从而配合包覆所述电芯11。
请参阅图10，所述支架13包括呈环状的周壁130和由所述周壁130围成的容置腔131。同时结合图2，所述电芯11收容于所述容置腔131中，设置于所述电芯11上的胶层17与所述周壁130粘结，从而将所述电芯11固定于所述容置腔131内。
在一些实施方式中，所述支架13还可包括分隔板133，所述分隔板133 设置于所述容置腔131内，且所述分隔板133的周缘连接所述周壁130，从而将所述容置腔131分隔成两个收容部135，其中，所述电芯11收容于每个收容部135中，且所述电芯11的第一主平面1131或第二主平面1133朝向所述分隔板133，使得朝向所述分隔板133的所述第一主平面1131或第二主平面1133上的缓冲层15抵持于所述分隔板133，从而有利于在电池组受到外力作用时降低电芯11的窜动。
在一些实施方式中，所述分隔板133可为散热片，进而有利于提高电池组的散热效率。
请参阅图2，所述固定件30可呈环状结构，所述固定件30套设于层叠设置的所述端板50和所述电芯模组10上以将所述电芯模组10固定于两个所述端板50之间。在本实施方式中，所述固定件30可为钢带。
在一些实施方式中，所述固定件30不仅限于钢带，也可为不易断裂环状塑胶等其他材质。在一些实施方式中，所述固定件30也可为其他结构而不仅限于环状结构，仅需保证将所述电芯模组10固定即可。
在一些实施方式中，所述端板50也可根据需要省略。
请参阅图11，上述电池组100应用于用电装置200中，为所述用电装置200提供电能。所述用电装置200可为但不仅限于汽车、电脑、电动玩具、无人机等。
本申请的电池组100，其通过缓冲层15和胶层17的配合，能够在所述电池组100受到外力作用时有效地降低电池组中电芯11的窜动，同时降低外力作用对所述电芯11的冲击。另外，所述胶层17从所述周面1135分别延伸至所述第一主平面1131和所述第二主平面1133，增加了胶层17与所述电芯11的粘结面积，能够在电池组受到外力作用时降低所述壳体113撕裂的风险。
另外，对于本领域的普通技术人员来说，可以根据本申请的技术构思做出其它各种相应的改变与变形，而所有这些改变与变形都应属于本申请的保护范围。

Claims (9)

  1. 一种电池组，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，所述电芯包括第一主平面、与所述第一主平面相背的第二主平面以及连接所述第一主平面和所述第二主平面的周面，其特征在于，所述电芯组件还包括：
    缓冲层，设置于所述电芯的第一主平面和相邻的另一所述电芯的第二主平面之间；
    胶层，包覆所述电芯的周面并从所述周面延伸至所述第一主平面和所述第二主平面，并粘结所述支架和所述电芯；
    其中，沿所述电芯的厚度方向，从所述周面延伸至所述第一主平面和所述第二主平面的胶层的厚度为a，所述缓冲层的厚度为b，所述电芯的厚度为c，所述电芯的膨胀率为d％，所述电池组满足以下条件：
    a＜b-c﹡d％。
  2. 如权利要求1所述的电池组，其特征在于，所述缓冲层的不可压缩率为e％，所述电池组进一步地满足以下条件：
    b﹡(1-e％)＝c﹡d％。
  3. 如权利要求1所述的电池组，其特征在于，所述胶层与所述缓冲层间隔。
  4. 如权利要求1所述的电池组，其特征在于，在所述第一主平面或所述第二主平面上，所述胶层自所述周面向内延伸的宽度为5-10mm。
  5. 如权利要求1所述的电池组，其特征在于，所述胶层的材料选自环氧树脂、聚氨酯树脂和有机硅胶中的至少一种。
  6. 如权利要求1所述的电池组，其特征在于，所述胶层与所述支架间的粘性大于0.6kgf/in。
  7. 如权利要求1所述的电池组，其特征在于，所述缓冲层与所述电芯间的粘性大于0.5kgf/in。
  8. 如权利要求1所述的电池组，其特征在于，所述第一主平面或所述第二主平面上设有多个间隔设置的缓冲层。
  9. 一种用电装置，其特征在于，所述用电装置包括如权利要求1-8任意一项所述的电池组和负载，所述电池组用于向所述负载供电。
PCT/CN2020/138857 2020-12-24 2020-12-24 电池组及应用所述电池组的用电装置 WO2022133862A1 (zh)

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