CN113270696A - 一种钢壳结构圆柱锂电池 - Google Patents

一种钢壳结构圆柱锂电池 Download PDF

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Publication number
CN113270696A
CN113270696A CN202110531110.0A CN202110531110A CN113270696A CN 113270696 A CN113270696 A CN 113270696A CN 202110531110 A CN202110531110 A CN 202110531110A CN 113270696 A CN113270696 A CN 113270696A
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steel shell
welding
welding groove
negative pole
steel
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徐敖奎
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Taixing Ninghui Lithium Battery Co ltd
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Taixing Ninghui Lithium Battery Co ltd
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Priority to CN202110531110.0A priority Critical patent/CN113270696A/zh
Publication of CN113270696A publication Critical patent/CN113270696A/zh
Priority to CN202280024731.2A priority patent/CN117099257A/zh
Priority to PCT/CN2022/074623 priority patent/WO2022242228A1/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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/545—Terminals formed by the casing of 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本发明公开了一种钢壳结构圆柱锂电池，包括一体成型的钢壳和位于钢壳底部的负极汇流片，两者采用焊接的方式进行固定，所述钢壳的底部外圈设置向下沉陷的下沉部，所述下沉部上设置凹陷的焊接槽，所述焊接槽为环形结构，且用于与负极汇流片进行激光点焊。本发明结构简单、设计合理；通过采用下沉陷的环形焊接槽，从而增加了钢壳与的负极汇流片接触面积，增加了导流量，从而适用于中大型电池使用。

Description

一种钢壳结构圆柱锂电池
技术领域
本发明涉及电池技术领域，具体涉及一种钢壳结构圆柱锂电池。
背景技术
现在传统的电池，不管是1865的小电池，还是40140的中电池或63280的大电池，负极片一般采用中心点焊的方式与焊针进行焊接，焊针一般是铜针或氧化铝铜针，或是铜针焊接位有钨钢头，该方式由于接触面积较小，因此导流量也较小，需进行改进。
发明内容
本发明的目的在于针对现有技术的缺陷和不足，提供一种钢壳结构圆柱锂电池。
为实现上述目的，本发明采用的技术方案是：一种钢壳结构圆柱锂电池，其创新点在于：包括一体成型的钢壳和位于钢壳底部的负极汇流片，两者采用焊接的方式进行固定，所述钢壳的底部外圈设置向下沉陷的下沉部，所述下沉部上设置凹陷的焊接槽，所述焊接槽为环形结构，且用于与负极汇流片进行激光点焊。
进一步的，所述负极汇流片的中心设置凸起的电极，用以与钢壳底部电阻焊接，所述电极的两侧设置条形的焊接槽，用于同电芯负极集流体的焊接。
进一步的，所述焊接槽上涂置UV胶。
采用上述结构后，本发明有益效果为：
本发明结构简单、设计合理；通过采用下沉陷的环形焊接槽，从而增加了钢壳与的负极汇流片接触面积，增加了导流量，从而适用于中大型电池使用。
附图说明
图1为本发明的主视图；
图2为图1中A的放大示意图；
图3为本发明中负极汇流片的结构示意图。
附图标记说明：
1钢壳、11下沉部、12焊接槽、2负极汇流片、21电极、22焊接槽。
具体实施方式
下面结合附图对本发明作进一步的说明。
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及具体实施方式，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施方式仅用以解释本发明，并不用于限定本发明。
参看图1-3，一种钢壳结构圆柱锂电池，包括一体成型的钢壳1和位于钢壳底部的负极汇流片2，两者采用焊接的方式进行固定，钢壳1的底部外圈设置向下沉陷的下沉部11，下沉部11上设置凹陷的焊接槽12，焊接槽12为环形结构，且用于与负极汇流片2进行激光点焊。具体的，凹陷的焊接槽12与负极汇流片2进行充分接触，从而增加了接触面积，提高了导电量；本申请的结构同样也适合铝壳结构圆柱锂电池。
本实施例中，负极汇流片2的中心设置凸起的电极21，电极21的两侧设置条形的焊接槽22。电极21用以与钢壳底部电阻焊接，焊接槽22用于同电芯负极集流体的焊接。
本实施例中，焊接槽22上涂置UV胶，用于防锈。
表一为本发明的焊接槽钢壳电池和传统的点焊钢壳电池电池性能对比：
焊接槽钢壳电池 点焊钢壳电池
容量 20.5 20.5
电池交流内阻 1.7mΩ 1.7mΩ
电池直流内阻 3mΩ 5.5mΩ
1C放电温升 5度 5.5度
2C放电温升 10度 13度
5C放电温升 15度 25度
表一
从表一可以看出，本发明的焊接槽钢壳电池具备更小的内阻和良好的放电温度，性能明显优于传统的点焊钢壳电池。
以上所述，仅用以说明本发明的技术方案而非限制，本领域普通技术人员对本发明的技术方案所做的其它修改或者等同替换，只要不脱离本发明技术方案的精神和范围，均应涵盖在本发明的权利要求范围当中。

Claims (3)

1.一种钢壳结构圆柱锂电池，其特征在于：包括一体成型的钢壳和位于钢壳底部的负极汇流片，两者采用焊接的方式进行固定，所述钢壳的底部外圈设置向下沉陷的下沉部，所述下沉部上设置凹陷的焊接槽，所述焊接槽为环形结构，且用于与负极汇流片进行激光点焊。
2.根据权利要求1所述的一种钢壳结构圆柱锂电池，其特征在于：所述负极汇流片的中心设置凸起的电极，用以与钢壳底部电阻焊接，所述电极的两侧设置条形的焊接槽，用于同电芯负极集流体的焊接。
3.根据权利要求1所述的一种钢壳结构圆柱锂电池，其特征在于：所述焊接槽上涂置UV胶。
CN202110531110.0A 2021-05-16 2021-05-16 一种钢壳结构圆柱锂电池 Withdrawn CN113270696A (zh)

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CN202280024731.2A CN117099257A (zh) 2021-05-16 2022-01-28 电池
PCT/CN2022/074623 WO2022242228A1 (zh) 2021-05-16 2022-01-28 电池

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113871763A (zh) * 2021-09-27 2021-12-31 远景动力技术(江苏)有限公司 圆柱形电池的壳体、圆柱形电池及圆柱形电池的安装方法
WO2022242228A1 (zh) * 2021-05-16 2022-11-24 深圳市拓邦锂电池有限公司 电池
WO2023050285A1 (zh) * 2021-09-30 2023-04-06 宁德时代新能源科技股份有限公司 电池单体及其制造方法和制造系统、电池以及用电装置
CN116169421A (zh) * 2022-09-09 2023-05-26 湖北亿纬动力有限公司 电池及其装配方法

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CN203071156U (zh) * 2013-02-08 2013-07-17 深圳市沃特玛电池有限公司 一种电池汇流片结构
CN204834764U (zh) * 2015-06-17 2015-12-02 深圳市沃特玛电池有限公司 一种端面焊的圆柱形高倍率锂离子电池
JP6658130B2 (ja) * 2016-03-11 2020-03-04 トヨタ自動車株式会社 電池モジュールの製造方法
CN206619636U (zh) * 2017-03-30 2017-11-07 陕西沃特玛新能源有限公司 一种电池
CN208539026U (zh) * 2018-08-28 2019-02-22 横店集团东磁股份有限公司 一种锂离子电池
CN112349949A (zh) * 2020-12-05 2021-02-09 天津赢慧科技咨询服务有限公司 无极耳焊接的电池及制备方法
CN113270696A (zh) * 2021-05-16 2021-08-17 泰兴市宁辉锂电池有限公司 一种钢壳结构圆柱锂电池

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022242228A1 (zh) * 2021-05-16 2022-11-24 深圳市拓邦锂电池有限公司 电池
CN113871763A (zh) * 2021-09-27 2021-12-31 远景动力技术(江苏)有限公司 圆柱形电池的壳体、圆柱形电池及圆柱形电池的安装方法
CN113871763B (zh) * 2021-09-27 2024-03-01 远景动力技术(江苏)有限公司 圆柱形电池的壳体、圆柱形电池及圆柱形电池的安装方法
WO2023050285A1 (zh) * 2021-09-30 2023-04-06 宁德时代新能源科技股份有限公司 电池单体及其制造方法和制造系统、电池以及用电装置
CN116169421A (zh) * 2022-09-09 2023-05-26 湖北亿纬动力有限公司 电池及其装配方法

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Application publication date: 20210817