WO2024055978A1 - 电池、电池组及用电设备 - Google Patents

电池、电池组及用电设备 Download PDF

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Publication number
WO2024055978A1
WO2024055978A1 PCT/CN2023/118476 CN2023118476W WO2024055978A1 WO 2024055978 A1 WO2024055978 A1 WO 2024055978A1 CN 2023118476 W CN2023118476 W CN 2023118476W WO 2024055978 A1 WO2024055978 A1 WO 2024055978A1
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WO
WIPO (PCT)
Prior art keywords
wall
section
recess
battery
walls
Prior art date
Application number
PCT/CN2023/118476
Other languages
English (en)
French (fr)
Inventor
胡春波
戴亨伟
林秀德
张立鹏
杨伟
陈辉
Original Assignee
欣旺达动力科技股份有限公司
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Application filed by 欣旺达动力科技股份有限公司 filed Critical 欣旺达动力科技股份有限公司
Publication of WO2024055978A1 publication Critical patent/WO2024055978A1/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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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 battery technology, specifically to a battery, a battery pack and electrical equipment.
  • poles are set in the grooves formed by the depressions in the casing. In order to ensure that the battery has good overcurrent capacity and good pole structural strength, it is often necessary to install poles with larger cross-sections.
  • a first aspect of the present application provides a battery, including: a housing, a first outer wall of the housing being recessed inward to form a first recess, the first recess having a first side wall; and an electrode assembly, the electrode assembly Housed in the housing; a pole is disposed on the first side wall of the first recess and is electrically connected to the electrode assembly.
  • the diameter of the pole is d
  • the diameter of the first side wall is d.
  • the height is b, which satisfies: 1/4 ⁇ d/b ⁇ 1; wherein, the height of the first side wall is the size of the first outer wall in the concave direction of the first recessed portion.
  • a second aspect of the application provides a battery pack, including: at least two batteries as described in the first aspect, the at least two batteries are arranged side by side; a bus bar located on the same side as the at least two batteries The second section of the connector is electrically connected.
  • a third aspect of the present application provides an electrical device, which includes the battery pack as described in the second aspect.
  • Figure 1 is a schematic diagram of the dimensions of the first recess and pole in this application.
  • Figure 2 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • Figure 2A is a schematic structural diagram of a housing in an embodiment of the present application.
  • Figure 2B is an enlarged structural view of point A in Figure 2;
  • Figure 3 is a BB-direction cross-sectional view of Figure 2;
  • Figure 4 is an enlarged structural schematic diagram of C in Figure 3;
  • Figure 5 is an exploded view of a battery provided by an embodiment of the present application.
  • Figure 5A is an enlarged structural schematic diagram of D in Figure 5;
  • Figure 6 is a partial structural schematic diagram of the assembly of cells, poles, connectors and gaskets in a battery provided by an embodiment of the present application;
  • Figure 7 is a schematic structural diagram of a battery case provided by an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a connector in a battery provided by an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a gasket in a battery provided by an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a battery provided by another embodiment of the present application.
  • Figure 10A is an enlarged structural schematic diagram of E in Figure 10;
  • Figure 11 is a schematic structural diagram of a battery provided by yet another embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a battery pack provided by an embodiment of the present application.
  • Electrode assembly 111.
  • Battery core 112.
  • the battery in this application includes: a case 120, an electrode assembly 110, and a pole 130.
  • the outer wall of the case 120 is concave inward to form a first recess 121.
  • the first recess 121 has a first side wall 1211; the electrode assembly 110 is accommodated inside the housing 120; the pole 130 is disposed on the first side wall 1211 of the first recess 121 and is electrically connected to the electrode assembly 110.
  • the pole 130 The diameter of is d, the height of the first side wall 1211 is b, the height of the first side wall 1211 is the size of the first outer wall in the concave direction of the first recess (121) (ie, the X direction in the figure), where, 1/ 4 ⁇ d/b ⁇ 1.
  • the outer wall of the housing 120 includes two opposite first walls 1201, two opposite second walls 1202, and two opposite third walls 1203.
  • the two opposite first walls 1201, the opposite The two second walls 1202 and the two third walls 1203 opposite to each other enclose the accommodation cavity 120a.
  • the area of the first wall 1201 is greater than the area of the second wall 1202
  • the area of the first wall 1201 is greater than the area of the third wall 1203 .
  • the length of the housing 120 is L
  • the width is W
  • the height is H, L>H>W, or L>W>H.
  • the first recess 121 is provided at the junction of the first wall 1201 and the second wall 1202 . It should be noted that the first recess 121 may also be provided at the interface between the first wall 1201 and the third wall 1203 or at the interface between the second wall 1202 and the third wall 1203 .
  • the first recess 121 also has opposite second side walls 1212 and third side walls 1213.
  • the second side walls 1212 and the third side walls 1213 are respectively connected to the first side wall 1211.
  • the second side walls The average width of 1212 and the third side wall 1213 is c, and the width of the first outer wall where the first recess 121 is not provided is W, which satisfies: 1/3W ⁇ c ⁇ W, where the width direction of the first outer wall is the shell 120 thickness direction Z.
  • W can ensure that there is enough space inside the case to accommodate the tabs without losing too much battery energy density.
  • the width a of the first side wall 1211 is a, where 1/6 ⁇ d/a ⁇ 1/2, and the width a of the first side wall 1211 is the distance from the second side wall 1212 to the third side wall 1213 .
  • the diameter d of the pole 130 ranges from 2 mm ⁇ d ⁇ 20 mm, ensuring that the pole has good structural strength and overcurrent capability.
  • the battery 100 includes: an electrode assembly 110 , a case 120 , a pole 130 and a connector 140 .
  • the electrode assembly 110 includes a battery core 111 and a tab 112.
  • the battery core 111 is a bare battery core in the shape of a rectangular parallelepiped. Both ends of the battery core 111 protrude respectively in the length direction.
  • a pole tab 112 is provided.
  • the pole tab 112 includes a first pole tab 112a and a second pole tab 112b.
  • One of the first pole tab 112a and the second pole tab 112b is a positive pole tab.
  • the other is the negative pole.
  • the number of electrode assemblies 110 is two, which are stacked to form a laminated structure.
  • the two poles on one side of the two electrode assemblies 110 are respectively bent and stacked to form the first pole 112a, and the two poles on the other side are The ears are respectively bent and then stacked to form the second pole ear 112b.
  • the housing 120 has an accommodation cavity 120 a for accommodating the electrode assembly 110 .
  • the housing 120 includes two opposite first walls 1201 , two opposite first walls 1201 , and two opposite first walls 1201 .
  • the second wall 1202, the two opposing third walls 1203, the two opposing first walls 1201, the two opposing second walls 1202, and the two opposing third walls 1203 enclose the accommodation cavity 120a.
  • the length of the first wall 1201 is greater than the length of the second wall 1202.
  • the area of the first wall 1201 is greater than the area of the second wall 1202
  • the area of the first wall 1201 is greater than the area of the third wall 1203 .
  • the length of the housing 120 is L, the width is W, and the height is H, L>H>W, or L>W>H.
  • the intersection of the first wall 1201 and the second wall 1202 is recessed inward to form a first recess 121.
  • the number of the recessed portions 121 is two, corresponding to the pole tabs 112 one-to-one.
  • the two first recessed portions 121 are provided at both ends of the housing 120 in the length direction X.
  • the pole 130 is disposed in the first recess 121, and the pole 130 is electrically connected to the battery core 111 through the tab 112.
  • the pole 130 has a relative The first end 131 and the second end 132 are provided.
  • the number of poles 130 is four, one pole 112 corresponds to two poles 130, and the first end 131 of the pole 130 extends into the housing 120.
  • the inner side of the accommodation cavity 120a is electrically connected to the pole tab 112, and the second end 132 of the pole post 130 is located inside the first recess 121.
  • the number of connectors 140 is two, corresponding to the tabs 112 one by one.
  • the connector 140 includes a first section 141 and a second section 142.
  • the first section 141 is disposed in the first recess 121 and is electrically connected to the pole 130. Specifically, the first section 141 is electrically connected to the second end 132 of the pole 130 , the second section 142 of the connector 140 is electrically connected to the first section 141 , the connector 140 is L-shaped, and the second section 142 of the connector 140 is electrically connected.
  • the section 142 extends to the outside of the first recess 121 and extends in a direction close to the housing 120 and is bent, so that the second section 142 is parallel to the second wall 1202 .
  • first section 141 and the second section 142 can be integrally arranged, the first section 141 is bent to form the second section 142, and the first section 141 and the second section 142 are perpendicular, which means that the first section 141 and the second section 142 are perpendicular to each other.
  • the second segment 142 may be vertical or approximately vertical, for example, the angle between the two may be slightly 10° above or below 90°.
  • the second section 142 is bent to the second wall 1202 to form a battery structure suitable for dual-pass long battery cells. When batteries 100 of this design are stacked to form a battery pack, the first walls 1201 of two adjacent batteries are in contact with each other, so that the second section 142 of the connector 140 is exposed to the second wall 1202 to facilitate electrical connection of the busbars.
  • the second section 142 of the connecting member 140 extends to the outside of the first recess 121 and away from the first recess 121 . Extending in a direction away from the housing 120 (not shown in the figure).
  • the battery 100 provided in this embodiment also includes a gasket 150.
  • the connector 140 is provided on the gasket 150.
  • the number of the gaskets 150 is two.
  • One connector 140 corresponds to one gasket 150.
  • the gasket 150 It includes a body 151. One end of the body 151 is bent to form a bending section 152.
  • the body 151 is disposed in the first recess 121 to support the first section 141 of the connector 140.
  • the bending section 152 extends from one end of the body 151 and is bent to The second wall 1202 and the bent section 152 are disposed between the pole 130 and the second section 142 to support the second section 142.
  • the pole 130 penetrates the body 151 and the first section 141 in sequence.
  • the gasket 150 can be made of insulating material or conductive material.
  • the battery 100 further includes an adapter piece 160.
  • the adapter piece 160 is disposed inside the accommodation cavity 120a.
  • the adapter piece 160 includes a first adapter portion 161 and a second adapter portion 162 connected in sequence.
  • the first adapter part 161 and the second adapter part 162 are perpendicular to each other, so that the adapter piece 160 has an L-shape.
  • the first adapter part 161 is welded and electrically connected to the tab 112 .
  • the inner end of the pole 130 extends into the accommodation cavity 120a (ie, the first end 131 of the pole 130) and is electrically connected to the second adapter part 162.
  • the pole 130 is electrically connected to the pole lug 112 through the adapter piece 160, and the connector 140 passes through The pole post 130 and the adapter piece 160 are electrically connected to the pole tab 112 .
  • a battery 100' provided by another embodiment of the present application is shown in Figure 10 and Figure 10A.
  • Two first recesses 121 are respectively provided at the intersection of two first walls 1201 and two third walls 1203.
  • the two first recesses 121 are provided at At both ends of the housing 120 in the height direction Y, in this embodiment, the second section 142 of the connecting member 140 extends and is bent in a direction close to the housing 120.
  • the second section 142 is bent to the third wall. 1203, the second section 142 is parallel to the third wall 1203, the third wall 1203 is recessed inward to form a second recess 122, and the second section 142 of the connecting member 140 is disposed in the second recess 122.
  • the second section 142 of the connector 140 is bent to the third wall 1203 to form a battery structure suitable for ejecting wide battery cells.
  • the depth of the first recess 121 recessed into the housing 120 matches the thickness of the first section 141 of the connector 140.
  • the depth of the first recess 121 matches the thickness of the first section 141 of the connector 140.
  • the thickness of the sections 141 is equal, so that the surface of the first section 141 is flush with the plane of the first wall 1201, and the depth of the second recess 122 recessed into the housing 120 matches the thickness of the second section 142 of the connector 140.
  • the depth of the second recess 122 is equal to the thickness of the second section 142, so that the surface of the second section 142 is flush with the plane of the third wall 1203.
  • a battery 100" provided by another embodiment of the present application is shown in Figure 11.
  • Two first recesses 121 are respectively provided at the intersection of two first walls 1201 and the same third wall 1203.
  • the two first recesses 121 are along the casing 120 are arranged at intervals in the length direction
  • the second section 142 is parallel to the third wall 1203.
  • the third wall 1203 is recessed inward to form a second recess 122.
  • the second section 142 of the connecting member 140 is disposed in the second recess 122.
  • the depth of the first recess 121 recessed into the housing 120 is the same as the first section 141 of the connector 140 . match the thickness.
  • the depth of the first recess 121 is equal to the thickness of the first section 141, so that the surface of the first section 141 is flush with the plane of the first wall 1201, and the second recess 122 faces the housing.
  • the depth of the internal recess 120 matches the thickness of the second section 142 of the connector 140.
  • the depth of the second recess 122 is equal to the thickness of the second section 142, so that the surface of the second section 142 is in contact with the third wall. 1203 is flush with the plane.
  • the connector 140 is designed to be a first section 141 and a second section 142 connected in sequence.
  • the first section 141 is disposed in the first recess 121 and connected with the first section 141.
  • the poles 130 are electrically connected, and the second section 142 is bent to the second wall 1202 or the third wall 1203, so that when multiple batteries are stacked to form a battery pack, the second section 142 of the connector 140 can be exposed on the side wall of the battery pack. It is convenient for electrical connection with the busbar and effectively reduces the difficulty of assembly.
  • the two first recesses 121 may also be respectively provided at the intersection of the two first walls 1201 and the two third walls 1203 (not shown in the figure), or the two first recesses 121 may be respectively provided at The same first wall 1201 is at the intersection of two third walls 1203 respectively, or the two first recesses 121 are respectively provided at the intersection of the two first walls 1201 and the same third wall 1203 respectively.
  • the first recess 121 may be formed in only one of the first wall 1201, the second wall 1202 and the third wall 1203, the first section 141 of the connecting member 140 is disposed in the first recess 121, and the second The section 142 is exposed on the surface where the first recess 121 is located.
  • the adjacent surfaces of two adjacent batteries without the first recess 121 are brought together so that the second Section 142 is exposed to facilitate electrical connection with the busbar.
  • the first recess 121 is only formed on the first wall 1201.
  • the second wall 1202 or the third wall 1203 of two adjacent batteries can be bonded together so that the second section 142 is exposed.
  • the battery pack 200 provided by the embodiment of the present application includes two busbars 210 and at least two batteries 100. Taking the two batteries 100 as an example, the two batteries 100 are arranged along the The first walls 1201 are arranged side by side in the vertical direction. Specifically, the first wall 1201 of the housing 120 of one battery 100 is in contact with the adjacent first wall 1201 of the housing 120 of another battery 100. The two stacked walls 1201 are arranged side by side.
  • the second sections 142 of the two connectors 140 on the same side of each battery 100 are both exposed to the second wall 1202, the second sections 142 of the two connectors 140 on the same side can be electrically connected to the same bus 210, thereby The superposition and stacking of two or more batteries 100 can be realized to form a battery pack with a higher capacity, thereby improving space utilization and facilitating the assembly of the busbar.
  • embodiments of the present application also provide an electrical device, which includes a battery 100, a battery 100’ or a battery 100′′, or the electrical device includes the battery pack 200.

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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

一种电池、电池组（200）及用电设备，电池包括壳体（120）、电极组件（110）、极柱（130），壳体（120）的第一外壁向内凹陷形成第一凹部（121），第一凹部（121）具有第一侧壁（1211）；电极组件（110）容置于壳体（120）内；极柱（130）设置于第一凹部（121）的第一侧壁（1211）上，且与电极组件（110）电连接，极柱（130）的直径为d，第一侧壁（1211）的高度为b，1/4≤d/b≤1，第一侧壁（1211）的高度为第一外壁在第一凹部（121）凹陷方向上的尺寸。通过设置极柱（130）的直径d与第一侧壁（1211）的高度b的比例关系，可以给极柱（130）提供足够的装配空间，同时避免电池的能量密度因在壳体（120）上设置第一凹部（121）而损失过多。

Description

电池、电池组及用电设备
本申请要求于2022年09月15日提交中国专利局、申请号为202222449609.X、申请名称为“电池、电池组及用电设备”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
本申请涉及电池技术领域，具体涉及一种电池、电池组及用电设备。
背景技术
随着刀片电池的推出，具备高体积空间利用率的长电池越来越受到电芯厂商青睐，这种长电池，极柱设置于壳体凹陷形成的凹槽内。为了保证电池具有较好的过流能力并具有较好的极柱结构强度，往往需要设置具有较大截面的极柱。
技术解决方案
本申请的第一方面提供一种电池，包括：壳体，所述壳体的第一外壁向内凹陷形成第一凹部，所述第一凹部具有第一侧壁；电极组件，所述电极组件容置于所述壳体内；极柱，设置于所述第一凹部的第一侧壁上，且与所述电极组件电连接，所述极柱的直径为d，所述第一侧壁的高度为b，满足：1/4≤d/b≤1；其中，所述第一侧壁的高度为所述第一外壁在所述第一凹部凹陷方向上的尺寸。
本申请的第二方面提供一种电池组，包括：至少两个如第一方面所述的电池，所述至少两个电池并排设置；汇流排，与所述至少两个电池上位于相同侧的连接件的第二段电连接。
本申请的第三方面提供一种用电设备，所述用电设备包括如第二方面所述的电池组。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，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是本申请中第一凹部及极柱尺寸示意图；
图2是本申请一实施例提供的电池的结构示意图；
图2A是本申请一实施例中壳体的结构示意图；
图2B是图2的A处放大结构意图；
图3是图2的B-B向剖视图；
图4是图3的C处放大结构示意图；
图5是本申请一实施例提供的电池的爆炸图；
图5A是图5的D处放大结构示意图；
图6是本申请一实施例提供的电池中电芯、极柱、连接件以及垫片组装的部分结构示意图；
图7是本申请一实施例提供的电池中壳体的结构示意图；
图8是本申请一实施例提供的电池中连接件的结构示意图；
图9是本申请一实施例提供的电池中垫片的结构示意图；
图10是本申请另一实施例提供的电池的结构示意图；
图10A是图10的E处放大结构示意图；
图11是本申请又一实施例提供的电池的结构示意图；
图12是本申请一实施例提供的电池组的结构示意图。
附图标记说明：
100、100’、100”、电池；
110、电极组件，111、电芯，112、极耳，112a、第一极耳，112b、第二极耳；
120、壳体，120a、容纳腔，1201、第一壁，1202、第二壁，1203、第三壁，121、第一凹部，1211、第一侧壁，1212、第二侧壁，1213、第三侧壁，122、第二凹部；
130、极柱，131、第一端，132、第二端，140、连接件，141、第一段，142、第二段，150、垫片，151、本体，152、弯折段，160、转接片，161、第一转接部，162、第二转接部；
200、电池组，210、汇流排。
本申请的实施方式
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。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。
参考图1，本申请中的电池包括：壳体120、电极组件110、极柱130，壳体120的外壁向内凹形成第一凹部121，第一凹部121具有第一侧壁1211；电极组件110容置于壳体120的内部；极柱130设置于第一凹部121的第一侧壁1211上，且与电极组件110电连接，极柱130 的直径为d，第一侧壁1211的高度为b，第一侧壁1211的高度为第一外壁在第一凹部(121)凹陷方向(即图中X方向)上的尺寸，其中，1/4≤d/b≤1。通过设置极柱直径d与第一凹部121相应凹陷方向尺寸b的比例关系，可以给极柱提供足够的装配空间并且能够避免电池能量密度因在壳体120上设置第一凹部121而损失过多。
具体地，壳体120的外壁包括相对设置的两个第一壁1201、相对设置的两个第二壁1202、相对设置的两个第三壁1203，相对设置的两个第一壁1201、相对设置的两个第二壁1202、相对设置的两个第三壁1203围合形成容纳腔120a。在一种实施方式中，第一壁1201的面积大于第二壁1202的面积，第一壁1201的面积大于第三壁1203的面积。壳体120的长度为L、宽度为W、高度为H，L＞H＞W，也可以是L＞W＞H。
在图1所示的实施例中，第一凹部121设置在第一壁1201与第二壁1202的交界处。需要说明的是，第一凹部121也可以设置在第一壁1201与第三壁1203的交界处或者设置在第二壁1202与第三壁1203的交界处。
在其他实施方式中，第一凹部121还具有相对的第二侧壁1212和第三侧壁1213，第二侧壁1212和第三侧壁1213分别与第一侧壁1211连接，第二侧壁1212和第三侧壁1213的平均宽度为c，第一外壁未设置第一凹部121处的宽度为W，满足：1/3W≤c＜W，其中，第一外壁的宽度方向为壳体120的厚度方向Z。通过设置第二侧壁1212和第三侧壁1213的平均宽度c小于第一外壁未设置第一凹部121处的宽度W而大于1/3倍的第一外壁未设置第一凹部121处的宽度W，能够保证壳体内部具有足够的空间以容纳极耳，又不至于损失多过的电池能量密度。
较佳地，第一侧壁1211的宽度为a，其中，1/6≤d/a≤1/2，第一侧壁1211的宽度a为第二侧壁1212到第三侧壁1213的距离。通过设置第一凹部的第一侧壁1211的宽度a与极柱130直径d的比值范围，能够保证给极柱提供足够的装配空间的情况下，不至于损失过多的电池能量密度。
具体地，极柱130的直径d范围为2mm≤d≤20mm，保证极柱具有较好的结构强度以及过流能力。
本申请一实施例中，参照图2～图9，电池100包括：电极组件110、壳体120、极柱130和连接件140。
参照图3、图4以及图6，电极组件110包括电芯111和极耳112，本实施例中，电芯111为裸电芯，形状为长方体，电芯111的长度方向两端分别凸出设置一极耳112，极耳112包括第一极耳112a和第二极耳112b，第一极耳112a和第二极耳112b中的一个为正极极耳， 另一个为负极极耳。本实施例中电极组件110的数量为两个，层叠设置形成叠片式结构，两电极组件110上位于一侧的两极耳分别弯折后层叠形成第一极耳112a，位于另一侧的两极耳分别弯折后层叠形成第二极耳112b。
参照图2～图5以及图7，壳体120具有用以容纳电极组件110的容纳腔120a，在本实施例中，壳体120包括相对设置的两个第一壁1201、相对设置的两个第二壁1202、相对设置的两个第三壁1203，相对设置的两个第一壁1201、相对设置的两个第二壁1202、相对设置的两个第三壁1203围合形成容纳腔120a。在一种实施方式中，第一壁1201的长度大于第二壁1202的长度。第一壁1201的面积大于第二壁1202的面积，第一壁1201的面积大于第三壁1203的面积。壳体120的长度为L、宽度为W、高度为H，L＞H＞W，也可以是L＞W＞H。
本实施例中，参照图1、图2、图2A、图2B、图4和图5、图5a，第一壁1201与第二壁1202的交接处向内凹陷形成第一凹部121，第一凹部121的数量为两个，与极耳112一一对应，两第一凹部121设置于壳体120的长度方向X的两端。
参照图1～图5、图5a以及图7，极柱130设置于第一凹部121内，极柱130通过极耳112与电芯111电连接，具体地，参照图3，极柱130具有相对设置的第一端131和第二端132，在本实施例中，极柱130的数量为四个，一极耳112对应两极柱130，极柱130的第一端131伸入壳体120的容纳腔120a内侧并与极耳112电连接，极柱130的第二端132位于第一凹部121内侧。
连接件140的数量为两个，与极耳112一一对应，连接件140包括第一段141和第二段142，第一段141设置于第一凹部121内并与极柱130电连接，具体地，第一段141与极柱130的第二端132电连接，连接件140的第二段142与第一段141电连接，连接件140的形状为L型，连接件140的第二段142延伸至第一凹部121外侧并向靠近壳体120的方向延伸、弯折，使得第二段142平行于第二壁1202。
在其他实施方式中，第一段141和第二段142可以一体设置，第一段141弯折形成第二段142，第一段141和第二段142垂直，指的是第一段141与第二段142可以是垂直的关系也可以是近似垂直，例如二者夹角在90°上下略有10°左右的浮动。第二段142弯折至第二壁1202，形成与双通长电芯相适配的电池结构。此种设计形式的电池100，在层叠形成电池组时，相邻两电池的第一壁1201贴合，使得连接件140的第二段142裸露于第二壁1202，以便于汇流排电连接。
另外，在其他实施方式中，连接件140的第二段142延伸至第一凹部121外侧并向远 离壳体120的方向延伸(图中未示出)。
另外，本实施例提供的电池100还包括垫片150，连接件140设置于垫片150上，垫片150的数量为两个，一连接件140对应一垫片150，具体地，垫片150包括本体151，本体151的一端弯折形成弯折段152，本体151设置于第一凹部121内以支撑连接件140的第一段141，弯折段152自本体151的一端延伸并弯折至第二壁1202，弯折段152设置于极柱130与第二段142之间以支撑第二段142，极柱130依次贯穿本体151和第一段141。其中，垫片150可以为绝缘材质，也可以为导电材质。
此外，参照图3，所述电池100还包括转接片160，转接片160设置于容纳腔120a内侧，转接片160包括依次连接的第一转接部161和第二转接部162，第一转接部161和第二转接部162相互垂直，使得转接片160具备L型形状，第一转接部161与极耳112焊接并电连接。极柱130伸入容纳腔120a内侧端(即极柱130的第一端131)与第二转接部162电连接，极柱130通过转接片160与极耳112电连接，连接件140通过极柱130和转接片160与极耳112电连接。
本申请另一实施例提供的电池100’如图10和图10A所示，两第一凹部121分别设置于两第一壁1201与两第三壁1203的交接处，两第一凹部121设置于壳体120的高度方向Y的两端，在本实施例中，连接件140的第二段142向接近壳体120的方向延伸、弯折，具体地，第二段142弯折至第三壁1203，第二段142与第三壁1203平行，第三壁1203向内凹陷形成有第二凹部122，连接件140的第二段142设置于第二凹部122内。这种连接件140的第二段142弯折至第三壁1203的形式，形成与顶出宽电芯相适配的电池结构。
其中，参照图10和图10A，第一凹部121向壳体120内部凹陷的深度与连接件140的第一段141的厚度相匹配，在本实施例中，第一凹部121的深度与第一段141的厚度相等，使得第一段141的表面与第一壁1201所在平面平齐，第二凹部122向壳体120内部凹陷的深度与连接件140的第二段142的厚度相匹配，在本实施例中，第二凹部122的深度与第二段142的厚度相等，使得第二段142表面与第三壁1203所在平面平齐。
本申请又一实施例提供的电池100”如图11所示，两第一凹部121分别设置于两个第一壁1201与同一第三壁1203的交接处，两第一凹部121沿壳体120的长度方向X间隔排布，在本实施例中，连接件140的第二段142向接近壳体120的方向延伸、弯折，具体地，第二段142弯折至第三壁1203，第二段142与第三壁1203平行，第三壁1203向内凹陷形成有第二凹部122，连接件140的第二段142设置于第二凹部122内。
其中，参照图11，第一凹部121向壳体120内部凹陷的深度与连接件140的第一段141 的厚度相匹配，在本实施例中，第一凹部121的深度与第一段141的厚度相等，使得第一段141的表面与第一壁1201所在平面平齐，第二凹部122向壳体120内部凹陷的深度与连接件140的第二段142的厚度相匹配，在本实施例中，第二凹部122的深度与第二段142的厚度相等，使得第二段142表面与第三壁1203所在平面平齐。
本申请实施例提供的电池100、电池100’或电池100”，通过将连接件140设计成依次连接的第一段141和第二段142，第一段141设置于第一凹部121内并与极柱130电连接，第二段142弯折至第二壁1202或第三壁1203上，使得多个电池叠置组成电池组时，连接件140的第二段142可以裸露在电池组侧壁上，便于与汇流排电连接，有效降低装配难度。
在另外的实施例中，两第一凹部121也可以分别设置于两个第一壁1201与两个第三壁1203的交接处(图中未示出)，或者两第一凹部121分别设置于同一个第一壁1201分别与两个第三壁1203的交接处，或者两第一凹部121分别设置于两第一壁1201分别与同一个第三壁1203的交接处。
在其他实现方式中，第一凹部121可仅形成于第一壁1201、第二壁1202和第三壁1203中的一个，连接件140的第一段141设置于第一凹部121内，第二段142裸露于第一凹部121所在面，而此种设计形式的电池100，在层叠形成电池组时，将相邻两电池未开设第一凹部121且相邻的面贴合，以使得第二段142裸露，便于与汇流排电连接。例如第一凹部121仅形成于第一壁1201，在层叠形成电池组时，可将相邻两电池的第二壁1202或第三壁1203贴合，使得第二段142裸露。
具体地，以电池100为例，参照图12，本申请实施例提供的电池组200包括两个汇流排210和至少两个电池100，以两个电池100为例，两个电池100沿着与第一壁1201垂直的方向并排排布，具体地，一电池100的壳体120的第一壁1201与另一电池100的壳体120的相邻的第一壁1201相贴合，层叠的两个电池100的位于相同侧的两个连接件140的第二段142由于均裸露于第二壁1202，使得相同侧的两连接件140的第二段142可与同一汇流排210电连接，从而实现两个或两个以上的电池100的叠加、堆叠形成更高容量的电池组，提高空间利用率，便于汇流排的组装。
另外，本申请实施例还提供一种用电设备，所述用电设备包括电池100、电池100’或电池100”，或者，所述用电设备包括所述电池组200。
以上对本申请实施例所提供的一种电池、电池组以及用电设备进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想， 在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (16)

  1. 一种电池，其中，包括：
    壳体，所述壳体的第一外壁向内凹陷形成第一凹部，所述第一凹部具有第一侧壁；
    电极组件，所述电极组件容置于所述壳体内；
    极柱，设置于所述第一凹部的第一侧壁上，且与所述电极组件电连接，所述极柱的直径为d，所述第一侧壁的高度为b，满足：1/4≤d/b≤1；所述第一侧壁的高度为所述第一外壁在所述第一凹部凹陷方向上的尺寸。
  2. 如权利要求1所述的电池，其中，所述第一凹部还具有相对的第二侧壁和第三侧壁，所述第二侧壁和所述第三侧壁分别与所述第一侧壁连接，所述第二侧壁和所述第三侧壁的平均宽度为c，所述第一外壁的宽度为W，满足：1/3W≤c＜W，其中，所述第一外壁的宽度方向为所述壳体的厚度方向。
  3. 如权利要求1所述的电池，其中，所述第一侧壁的宽度为a，1/6≤d/a≤1/2。
  4. 如权利要求1-3任一项所述的电池，其中，所述极柱的直径d范围为2mm≤d≤20mm。
  5. 如权利要求1所述的电池，其中，所述电池还包括连接件，所述连接件一端设置于所述第一凹部与所述极柱电连接，所述连接件的另一端从所述第一凹部伸出。
  6. 如权利要求5所述的电池，其中，所述连接件包括第一段、第二段，所述第一段设置于所述第一凹部的第一侧壁，所述第一段与所述极柱电连接，所述第二段与所述第一段电连接后从所述第一凹部伸出；所述第二段从所述第一凹部伸出后向靠近所述壳体的方向延伸，所述壳体上与所述第二段对应的部分向内凹陷形成第二凹部，所述第二段容置于所述第二凹部。
  7. 如权利要求6所述的电池，其中，所述连接件的第一段与第二段一体设置。
  8. 如权利要求6所述的电池，其中，所述连接件的第一段与第二段相互垂直。
  9. 如权利要求5所述的电池，其中，所述壳体包括相对设置的两个第一壁、相对设置的两个第二壁、相对设置的两个第三壁，所述相对设置的两个第一壁、相对设置的两个第二壁、相对设置的两个第三壁合围形成容纳腔，所述电极组件容置于所述容纳腔；
    所述第一壁的表面积大于所述第二壁的表面积，所述第一壁的表面积大于所述第三壁的表面积，所述第一外壁为所述第二壁。
  10. 如权利要求5所述的电池，其中，所述壳体包括相对设置的两个第一壁、相对设置的两个第二壁、相对设置的两个第三壁，所述相对设置的两个第一壁、相对设置的两个第 二壁、相对设置的两个第三壁合围形成容纳腔，所述电极组件容置于所述容纳腔；
    所述第一壁的表面积大于所述第二壁的表面积，所述第一壁的表面积大于所述第三壁的表面积，所述第一外壁为所述第三壁。
  11. 如权利要求6-10中任一项所述的电池，其中，所述第一凹部的数量为二，沿所述壳体长度方向布置。
  12. 如权利要求6-10中任一项所述的电池，其中，所述第一凹部的数量为二，沿所述壳体高度方向布置。
  13. 如权利要求6-10中任一项所述的电池，其中，所述第二凹部的数量为二，沿所述壳体长度方向布置。
  14. 如权利要求6-10中任一项所述的电池，其中，所述第二凹部的数量为二，沿所述壳体高度方向布置。
  15. 一种电池组，其中，包括：
    至少两个如权利要求5～14任一项所述的电池，所述至少两个电池并排设置；
    汇流排，与所述至少两个电池上位于相同侧的连接件的第二段电连接。
  16. 一种用电设备，其中，所述用电设备包括如权利要求15所述的电池组。
PCT/CN2023/118476 2022-09-15 2023-09-13 电池、电池组及用电设备 WO2024055978A1 (zh)

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CN107681099A (zh) * 2016-08-01 2018-02-09 周锡卫 一种竖式蓄电池卧式连接结构的铅酸蓄电池
CN214589168U (zh) * 2021-05-14 2021-11-02 中航锂电科技有限公司 电池及电池组
CN114039172A (zh) * 2021-11-12 2022-02-11 欣旺达电动汽车电池有限公司 单体电池及电池包
CN218498203U (zh) * 2022-09-15 2023-02-17 欣旺达电动汽车电池有限公司 电池、电池组及用电设备

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