WO2022242744A1 - 电池 - Google Patents

电池 Download PDF

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Publication number
WO2022242744A1
WO2022242744A1 PCT/CN2022/094102 CN2022094102W WO2022242744A1 WO 2022242744 A1 WO2022242744 A1 WO 2022242744A1 CN 2022094102 W CN2022094102 W CN 2022094102W WO 2022242744 A1 WO2022242744 A1 WO 2022242744A1
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WO
WIPO (PCT)
Prior art keywords
cover plate
battery according
current collector
annular protrusion
negative electrode
Prior art date
Application number
PCT/CN2022/094102
Other languages
English (en)
French (fr)
Inventor
黄利明
岳亮亮
刘静
徐悦斌
何巍
Original Assignee
湖北亿纬动力有限公司
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 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Priority to EP22804063.0A priority Critical patent/EP4152492A1/en
Priority to US18/013,939 priority patent/US20240072343A1/en
Publication of WO2022242744A1 publication Critical patent/WO2022242744A1/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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells 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
    • H01M50/102—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
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • 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 battery field, for example, to a battery.
  • the cylindrical lithium-ion battery in the related art is equipped with a cover plate, the reliability of the assembly and connection between the cover plate and the shell is poor, and there is a risk of cracking and disengagement under certain conditions such as vibration or pressure. Therefore, , which poses a major safety hazard.
  • the present application provides a battery, the connection strength between the cover plate and the casing of the battery is high, and the airtightness is good.
  • a battery including a shell and a cover plate
  • the shell is a cylindrical tank structure
  • the cover plate is provided with an annular protrusion facing the top surface of the shell
  • the annular protrusion The central axis coincides with the central axis of the cover plate
  • the edge of the top end surface of the cover plate is provided with a first welding platform surface
  • the first welding platform surface is circumferentially arranged around the annular protrusion
  • the outer wall of the annular protrusion and the first welding platform form a stepped surface
  • the annular protrusion enters the interior of the housing from the annular bottom end surface of the housing, the annular bottom end surface of the housing and the The first welding platform is in surface contact and the laser welding connection is made.
  • FIG. 1 is a schematic structural diagram of a cover plate provided by an embodiment of the present application.
  • Fig. 2 is a front view of a cover plate provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • FIG. 4 is a cross-sectional view of part A of FIG. 3 .
  • FIG. 5 is a schematic structural diagram of a cover plate provided by another embodiment of the present application.
  • Fig. 6 is a front view of a cylindrical battery provided by an embodiment of the present application.
  • FIG. 7 is a cross-sectional view of part B in FIG. 6 .
  • Fig. 8 is a top view of a casing provided by an embodiment of the present application.
  • reference signs are: 1, cover plate; 11, annular protrusion; 12, first welding platform surface; 13, second welding platform surface; 14, current collecting area; 15, welding area; 2, shell; 21. Through hole; 3. Rolling core; 4. Negative current collector; 5. Support block; 6. Positive pole; 7. Positive current collector; 8. Insulation seal.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of said features.
  • “plurality” means two or more, unless otherwise clearly and specifically defined.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, directly connected, or indirectly connected through an intermediary, and can be an internal communication between two elements or an interactive relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • a first feature being "on” or “under” a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them.
  • “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
  • “Below”, “below” and “under” the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is less horizontal than the second feature.
  • a battery with a new structure provided by an embodiment of the present application includes a case 2 and a cover plate 1.
  • the core 3 and the negative current collector 4 are connected by laser welding between the annular bottom end surface of the casing 2 and the top surface of the cover plate 1 facing the casing.
  • the diameter of the cover plate 1 is equal to the maximum diameter of the housing 2 .
  • An annular protrusion 11 is provided on the top surface of the cover plate 1 facing the housing 2 , and the central axis of the annular protrusion 11 coincides with the central axis of the cover plate 1 .
  • the edge of the top end surface of the cover plate 1 towards the housing 2 is provided with a first welding platform surface 12, the first welding platform surface 12 is circumferentially arranged around the annular protrusion 11, the outer side wall of the annular protrusion 11 and the first welding platform surface 12 form a step surface.
  • the annular bottom end surface of the shell 2 is in contact with the first welding platform surface 12 and undergoes laser welding, so that the structure is firm and the sealing performance is good.
  • the top end surface of the annular protrusion 11 is provided with a second welding platform surface 13, the end surface of the negative electrode current collector 4 away from the cover plate 1 is connected to the negative electrode of the winding core 3, and the end surface of the negative electrode current collector 4 near the cover plate 1 is connected to the first end surface of the annular protrusion 11.
  • Four support blocks 5 are arranged between the two welding platform surfaces 13, and the four support blocks 5 are evenly distributed circumferentially around the central axis of the cover plate 1.
  • the support blocks 5 are made of conductive materials, and the support blocks 5 are far away from the negative electrode current collector 4. One end is welded to the second welding platform surface 13 .
  • the end of the support block 5 away from the cover plate 1 is integrally provided with the negative electrode current collector 4 .
  • An end of the support block 5 away from the cover plate 1 is welded to the negative current collector 4 .
  • the battery casing in the related art will be grooved to fix the negative electrode current collector inside the casing, but the battery casing provided by this application does not need to be grooved.
  • the ring The top surface of the protrusion is provided with a second welding platform surface, the end surface of the negative electrode current collector away from the cover plate is connected to the negative electrode of the winding core, and a number of holes are arranged between the end surface of the negative electrode current collector close to the cover plate and the second welding platform surface of the annular protrusion.
  • the support block, the support block is made of conductive material, and the end of the support block away from the negative electrode current collector is welded and connected to the surface of the second welding platform.
  • the other end of the support block and the negative electrode collector can be integrated or connected by welding.
  • the cover plate is rigidly connected with the negative current collector through the support block.
  • the stacked positive electrode current collector, winding core and negative electrode current collector are clamped between the support block and the bottom surface of the casing.
  • the outer sidewall of the annular protrusion contacts the inner sidewall of the housing, so the annular protrusion can function as a positioning connection.
  • This application provides a battery with a new structure.
  • the connection strength between the cover plate and the shell of the battery is high, and the airtightness is good, and the shell does not need to be formed by rolling grooves to consume the internal space, so the space utilization rate inside the shell High, and the space utilization ratio inside the casing can be further improved by reducing the height of the support block.
  • the negative electrode current collector simultaneously functions as a sealing terminal and a negative electrode conductive terminal.
  • the outer side wall of the annular protrusion is connected to the inner side wall of the casing by laser welding.
  • the battery further includes a winding core and a negative electrode current collector, and the winding core and the negative electrode current collector are located inside the case.
  • the cover plate includes a current collecting area 14 and a welding area 15, the current collecting area 14 is set to collect the current of the winding core, and the welding area 15 is set to be compatible with the The cover plate is welded.
  • the collecting area 14 is an annular protruding area provided on the top surface of the cover plate towards the casing, the central axis of the collecting area 14 coincides with the central axis of the cover plate, and is arranged to be electrically connected to the negative current collector inside the casing.
  • the welding area 15 is another annular raised area provided on the top surface of the cover plate towards the casing. The central axis of the welding area 15 also coincides with the central axis of the cover plate, and is set to weld and seal the battery.
  • the negative electrode current collector has a planar structure or a three-dimensional structure, for example, a circular planar structure or an irregular three-dimensional structure, and the negative electrode current collector is configured to realize the current collection of the winding core and the electrical connection with the cover plate.
  • the height of the annular protrusion is 0.1mm-3mm.
  • the diameter of the annular protrusion is 0.05mm-0.2mm smaller than the inner diameter of the housing.
  • the inclination angle of the inclined surface where the annular protrusion contacts the housing can be 1°-5°.
  • the housing includes a cylindrical body and a tank structure located on the top of the housing, and the tank structure is ring-shaped.
  • the battery further includes a positive pole 6 and an insulating seal 8, and the top of the casing is provided with a through hole 21, and the through hole 21 is configured to install the positive pole 6 and the insulating seal 8 , the central axis of the through hole 21 coincides with the central axis of the cover plate.
  • the middle area on the top of the casing is the positive pole 6, and the cylindrical casing is the same-side output structure of the negative electrode area.
  • the battery further includes a positive current collector 7 , the positive current collector 7 is electrically connected to the positive post 6 , and the negative current collector is electrically connected to the cover plate.
  • the annular bottom end surface of the shell cooperates with the annular raised peripheral area of the cover plate, and the sealing connection between the cover plate and the shell is realized by laser welding, and the assembly of the battery is completed.
  • the height of the battery is 80mm-130mm, and the height of the protrusion of the positive pole 6 is 1mm-3mm.
  • the battery may be 46 mm in diameter.

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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)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请涉及一种电池，包括壳体和盖板，壳体为圆柱型的槽体结构，盖板朝向壳体的顶端面设置有环形凸起，环形凸起的中轴线和盖板的中轴线重合，盖板的顶端面的边缘设置有第一焊接平台面，第一焊接平台面绕环形凸起周向设置，环形凸起的外侧壁和第一焊接平台面构成台阶面，环形凸起由壳体的环形底端面进入壳体内部，壳体的环形底端面和第一焊接平台面接触并且激光焊接连接。

Description

电池
本申请要求在2021年5月21日提交中国专利局、申请号为202121100856.8受理的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池领域，例如涉及一种电池。
背景技术
相关技术中的圆柱型锂离子电池设置有盖板的圆柱形锂离子电池，其盖板与壳体组装连接的可靠性差，受到震动或压力等一定条件下时存在开裂、脱开的风险，因此，具有重大安全隐患。
发明内容
本申请提供一种电池，该电池的盖板与壳体的连接强度高，密闭性好。
本申请采用如下技术方案：一种电池，包括壳体和盖板，壳体为圆柱型的槽体结构，所述盖板朝向所述壳体的顶端面设置有环形凸起，所述环形凸起的中轴线和所述盖板的中轴线重合，所述盖板的顶端面的边缘设置有第一焊接平台面，所述第一焊接平台面绕所述环形凸起周向设置，所述环形凸起的外侧壁和所述第一焊接平台面构成台阶面，所述环形凸起由所述壳体的环形底端面进入所述壳体内部，所述壳体的环形底端面和所述第一焊接平台面接触并且激光焊接连接。
附图说明
图1为本申请一实施例提供的盖板的结构示意图。
图2为本申请一实施例提供的盖板的正视图。
图3为本申请一实施例提供的电池的结构示意图。
图4为图3的局部A的剖视图。
图5为本申请另一实施例提供的盖板的结构示意图。
图6为本申请一实施例提供的圆柱型电池的正视图。
图7为图6的局部B的剖视图。
图8为本申请一实施例提供的壳体的俯视图。
其中，附图标记为：1、盖板；11、环形凸起；12、第一焊接平台面；13、第二焊接平台面；14、集流区域；15、焊接区域；2、壳体；21、通孔；3、卷芯；4、负极集流体；5、支撑块；6、正极柱；7、正极集流体；8、绝缘密封件。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体地限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度小于第二特征。
如图1-4中所示，本申请一实施例提供的一种新型结构的电池，包括壳体2和盖板1，壳体2为圆柱型的槽体结构，壳体2内部设置有卷芯3和负极集流体4，壳体2的环形底端面和盖板1朝向壳体的顶端面激光焊接连接。盖板1的直径等于壳体2的最大直径。
盖板1朝向壳体2的顶端面设置有环形凸起11，环形凸起11的中轴线和盖板1的中轴线重合。盖板1朝向壳体2的顶端面的边缘设置有第一焊接平台面12，第一焊接平台12面绕环形凸起11周向设置，环形凸起11的外侧壁和第一焊接平台面12构成台阶面。盖板1和壳体2连接时，环形凸起11由壳体2的环形底端面进入壳体2内部，并且环形凸起11的外侧壁和壳体2的内侧壁接触。
盖板1和壳体2连接时，壳体2的环形底端面和第一焊接平台面12接触并且进行激光焊接，结构牢固，密封性好。
环形凸起11的顶端面设置第二焊接平台面13，负极集流体4远离盖板1的端面和卷芯3的负极连接，负极集流体4靠近盖板1的端面和环形凸起11的第二焊接平台面13之间设置有四个支撑块5，四个支撑块5绕盖板1的中轴线均匀周向分布，支撑块5采用导电材料制成，支撑块5远离负极集流体4的一端和第二焊接平台面13焊接连接。
支撑块5远离盖板1的一端和负极集流体4一体设置。
支撑块5远离盖板1的一端和负极集流体4焊接连接。
以上所述实施例的多个技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的多个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
相关技术中的电池壳体会进行滚槽成型从而将壳体的内部的负极集流体卡合固定，但本申请提供的电池的壳体不需要进行滚槽成型处理，为了固定负极集流体，将环形凸起的顶端面设置第二焊接平台面，负极集流体远离盖板的端面和卷芯的负极连接，负极集流体靠近盖板的端面和环形凸起的第二焊接平台面之间设置有若干支撑块，支撑块采用导电材料制成，支撑块远离负极集流体的一端和第二焊接平台面焊接连接。支撑块的另一端和负极集流体可以一体设置也可以焊接连接。盖板通过支撑块和负极集流体刚性连接。层叠设置的正极集流体、卷芯和负极集流体夹紧在支撑块和壳体的槽底面之间。
在一实施例中，盖板和壳体连接时，环形凸起的外侧壁和壳体的内侧壁接触，因此环形凸起可以起到定位连接的作用。
本申请提供一种新型结构的电池，该电池的盖板与壳体的连接强度高，密闭性好，并且壳体不需要进行滚槽成型来损耗内部的空间，因此壳体内部的空间利用率高，并且可以通过缩小支撑块的高度进一步提升壳体内部的空间利用率。另一方面，负极集流体同时起到封口端子和负极导电端子的作用。
在一实施例中，环形凸起的外侧壁与壳体的内侧壁激光焊接连接。
在一实施例中，电池还包括卷芯和负极集流体，卷芯和负极集流***于壳体内部。
如图5所示，在一实施例中，盖板包括集流区域14和焊接区域15，所述集流区域14设置为集流所述卷芯的电流，所述焊接区域15设置为与所述盖板进行焊接连接。集流区域14为盖板朝向壳体的顶端面设置的环形凸起区域，集流区域14的中轴线与盖板的中轴线重合，设置为与壳体内部的负极集流体进行电连接。焊接区域15为盖板朝向壳体的顶端面设置的另一环形凸起区域，焊接区域15的中轴线也与盖板的中轴线重合，设置为对电池进行焊接密封。
在一实施例中，负极集流体为平面结构或立体结构，例如可以为圆形平面结构或不规则立体结构，负极集流体设置为实现卷芯集流以及与盖板的电连接。
在一实施例中，环形凸起的高度为0.1mm-3mm。
在一实施例中，环形凸起的直径比壳体的内径小0.05mm-0.2mm。环形凸起与壳体之间存在装配关系，这样设置便于转配和焊接融化物流动。环形凸起与壳体接触的倾斜面的倾斜角度可以为1°-5°。
在一实施例中，
Figure PCTCN2022094102-appb-000001
在一实施例中，壳体包括圆柱型筒身和位于壳体顶部的槽体结构，槽体结构为环形。
如图6-8所示，在一实施例中，电池还包括正极柱6和绝缘密封件8，壳体的顶部设有通孔21，通孔21设置为安装正极柱6和绝缘密封件8，通孔21的中轴线与盖板的中轴线重合。 这样壳体顶部中间区域为正极柱6，圆柱型壳体为负极区域的同侧输出结构。
在一实施例中，电池还包括正极集流体7，正极集流体7与正极柱6电连接，负极集流体与盖板电连接。壳体环形底端面与盖板环形凸起的周边区域配合，通过激光焊接实现盖板与壳体的密封连接，完成电池的组装。
在一实施例中，所述电池的高度为80mm-130mm，所述正极柱6凸起的高度为1mm-3mm。
在一实施例中，电池的直径可以为46mm。

Claims (15)

  1. 一种电池，包括壳体和盖板，所述壳体为圆柱型的槽体结构，所述盖板朝向所述壳体的顶端面设置有环形凸起，所述环形凸起的中轴线和所述盖板的中轴线重合，所述盖板的顶端面的边缘设置有第一焊接平台面，所述第一焊接平台面绕所述环形凸起周向设置，所述环形凸起的外侧壁和所述第一焊接平台面构成台阶面，所述环形凸起由所述壳体的环形底端面进入所述壳体内部，所述壳体的环形底端面和所述第一焊接平台面接触并且激光焊接连接。
  2. 根据权利要求1所述的电池，其中，所述环形凸起的外侧壁和所述壳体的内侧壁接触。
  3. 根据权利要求2所述的电池，其中，所述环形凸起的外侧壁与所述壳体的内侧壁激光焊接连接。
  4. 根据权利要求1所述的电池，其中，所述环形凸起的顶端面设置第二焊接平台面；
    所述电池还包括卷芯和负极集流体，所述卷芯和所述负极集流***于所述壳体内部；
    所述负极集流体远离所述盖板的端面和所述卷芯的负极连接，所述负极集流体靠近所述盖板的端面和所述第二焊接平台面之间设置有支撑块，所述支撑块远离所述负极集流体的一端和所述第二焊接平台面焊接连接。
  5. 根据权利要求4所述的电池，其中，所述支撑块远离所述盖板的一端和所述负极集流体一体设置。
  6. 根据权利要求4所述的电池，其中，所述支撑块远离所述盖板的一端和所述负极集流体焊接连接。
  7. 根据权利要求4所述的电池，其中，所述盖板包括集流区域和焊接区域，所述集流区域设置为集流所述卷芯的电流，所述焊接区域设置为与所述盖板进行焊接连接。
  8. 根据权利要求7所述的电池，所述负极集流体为平面结构或立体结构。
  9. 根据权利要求1所述的电池，其中，所述环形凸起的高度为0.1mm-3mm。
  10. 根据权利要求1所述的电池，其中，所述环形凸起的直径比所述壳体的内径小0.05mm-0.2mm。
  11. 根据权利要求1所述的电池，其中，
    Figure PCTCN2022094102-appb-100001
  12. 根据权利要求1所述的电池，其中，所述壳体包括圆柱型筒身和位于所述壳体顶部的槽体结构，所述槽体结构为环形。
  13. 根据权利要求4所述的电池，还包括正极柱和绝缘密封件，所述壳体的顶部设有通孔，所述通孔设置为安装所述正极柱和所述绝缘密封件，所述通孔的中轴线与所述盖板的中轴线重合。
  14. 根据权利要求13所述的电池，还包括正极集流体，所述正极集流体与所述正极柱电连接，所述负极集流体与所述盖板电连接。
  15. 根据权利要求12所述电池，其中，所述电池的高度为80mm-130mm，所述正极柱凸起的高度为1mm-3mm。
PCT/CN2022/094102 2021-05-21 2022-05-20 电池 WO2022242744A1 (zh)

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