WO2024074083A1 - 电池 - Google Patents

电池 Download PDF

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Publication number
WO2024074083A1
WO2024074083A1 PCT/CN2023/114672 CN2023114672W WO2024074083A1 WO 2024074083 A1 WO2024074083 A1 WO 2024074083A1 CN 2023114672 W CN2023114672 W CN 2023114672W WO 2024074083 A1 WO2024074083 A1 WO 2024074083A1
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WO
WIPO (PCT)
Prior art keywords
half shell
arc
battery cell
pole
shaped
Prior art date
Application number
PCT/CN2023/114672
Other languages
English (en)
French (fr)
Inventor
卫志达
谢继春
Original Assignee
珠海冠宇电池股份有限公司
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 珠海冠宇电池股份有限公司 filed Critical 珠海冠宇电池股份有限公司
Publication of WO2024074083A1 publication Critical patent/WO2024074083A1/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
    • H01M50/107—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
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • 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 battery technology, and in particular to a battery.
  • curved batteries which can be understood as batteries generated using curved pole pieces.
  • the aluminum-plastic film shell prepared by the relevant technology is a cubic structure, which cannot adapt to the curved structure of the curved battery cell. This makes the fixing effect of the curved battery cell in the aluminum-plastic film shell prepared by the relevant technology poor, resulting in poor safety of the curved battery prepared based on the relevant technology.
  • the purpose of the embodiments of the present application is to provide a battery for solving the problem of poor safety of arc-shaped batteries prepared by related technologies.
  • An embodiment of the present application provides a battery, comprising: a first half shell, a second half shell and an arc-shaped battery cell, wherein the first half shell and the second half shell are connected to enclose an arc-shaped storage cavity matching the arc-shaped battery cell, and the arc-shaped battery cell is accommodated in the arc-shaped storage cavity.
  • the first half shell includes a first curved plate opposite to the second half shell
  • the second half shell includes a second curved plate opposite to the first half shell
  • the first curved surface of the curved battery cell close to the first half shell is opposite to the first curved plate
  • the second curved surface of the curved battery cell close to the second half shell is opposite to the second curved plate.
  • the first half shell includes a first annular flange plate
  • the second half shell includes a second annular flange plate
  • the first flange plate and the second flange plate are connected to seal the arc-shaped receiving cavity.
  • the distance between the cut surface of the first arc plate farthest from the second half shell and the plane where the first flange plate is located is greater than or equal to 2 mm.
  • the distance between the cut surface of the second arc plate closest to the first half shell and the plane where the second flange plate is located is greater than or equal to 0.3 mm.
  • the difference between the curvature corresponding to the first curved plate and the curvature corresponding to the second curved plate is greater than or equal to 0 degrees and less than or equal to 10 degrees.
  • a liquid injection hole is provided on the first half shell or the second half shell, and a sealing member is sealed in the liquid injection hole.
  • a pole hole is provided on the first half shell or the second half shell, a conductive member is sealed in the pole hole, and one end of the conductive member penetrates into the pole hole and is electrically connected to a pole lug of the arc-shaped battery cell.
  • a pole hole and a liquid injection hole are provided on the end surface of the first half shell.
  • the conductive member includes a pole and a connecting piece; the pole passes through the pole hole and extends into the arc-shaped receiving cavity, and one end of the pole extending into the arc-shaped receiving cavity is electrically connected to the pole ear of the arc-shaped battery cell through the connecting piece.
  • the conductive member further includes an inner insulating pad and an outer insulating pad, and the pole includes an inner end and an outer end; the first surface of the connecting piece close to the arc-shaped battery cell is respectively in contact with the pole ear and the inner end of the arc-shaped battery cell.
  • the inner insulating gasket is located between the second surface of the connecting plate away from the arc-shaped battery cell and the inner surface of the first half shell where the pole hole is located, or the inner insulating gasket is located between the second surface of the connecting plate away from the arc-shaped battery cell and the inner surface of the second half shell where the pole hole is located.
  • the outer insulating pad is located between the outer surface of the first half shell where the pole hole is located and the outer end, or the outer insulating pad is located between the outer surface of the second half shell where the pole hole is located and the outer end.
  • the orthographic projection of the outer end portion on the outer insulating pad is located in the outer insulating pad
  • the orthographic projection of the inner end portion on the inner insulating pad is located in the inner insulating pad
  • the orthographic projection of the connecting piece on the inner insulating pad is located in the inner insulating pad.
  • the conductive member further includes a transfer plate; a first surface of the transfer plate close to the arc-shaped battery cell abuts against a pole ear of the arc-shaped battery cell, and a second surface of the transfer plate away from the arc-shaped battery cell abuts against a first surface of the connecting plate close to the arc-shaped battery cell.
  • a first avoidance groove is provided at the end of the first half shell of the inner insulating pad close to the pole hole; or a first avoidance groove is provided at the end of the second half shell of the inner insulating pad close to the pole hole.
  • a second avoidance groove is provided at an end of the connecting piece close to the first half shell where the pole hole is located, or a second avoidance groove is provided at an end of the connecting piece close to the second half shell where the pole hole is located.
  • the outer insulating pad includes an insulating tube portion passing through the pole hole and an annular extension portion located at one end of the insulating tube portion away from the arc-shaped battery cell, and along the direction from the inner end to the outer end, the thickness of the insulating tube portion is equal to one of the following thicknesses: the sum of the thickness of the extension portion, the thickness of the inner insulating pad and the thickness of the first half shell where the pole hole is located; the sum of the thickness of the extension portion, the thickness of the inner insulating pad and the thickness of the second half shell where the pole hole is located.
  • the end surface of the first half shell includes a first pressure relief area and a first non-pressure relief area, and the thickness of the first pressure relief area is smaller than the thickness of the first non-pressure relief area.
  • the end surface of the second half shell includes a second pressure relief area and a second non-pressure relief area, and the thickness of the second pressure relief area is smaller than the thickness of the second non-pressure relief area.
  • the structure of the aluminum-plastic film shell is adapted to the structure of the arc-shaped battery cell, so as to facilitate the packaging operation of the arc-shaped battery cell in the aluminum-plastic film shell and improve the fixing effect of the arc-shaped battery cell in the aluminum-plastic film shell, thereby reducing the probability of relative movement between the arc-shaped battery cell and the aluminum-plastic film shell, thereby achieving the technical effect of improving the safety of the arc-shaped battery; and the above setting can also make full use of the space in the aluminum-plastic film shell by the arc-shaped battery cell, so that the arc-shaped battery can maintain a higher energy density.
  • FIG. 1 is an exploded view of a battery provided in an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a first half shell provided in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a second half shell provided in an embodiment of the present application.
  • FIG. 4 is one of the structural schematic diagrams of a battery provided in an embodiment of the present application.
  • FIG. 5 is a second schematic diagram of the structure of a battery provided in an embodiment of the present application.
  • Fig. 6 is a cross-sectional view taken along line A-A in Fig. 5 .
  • FIG. 7 is an enlarged schematic diagram of point B in FIG. 6 .
  • FIG8 is a schematic diagram of a pole provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of an inner insulating pad and a connecting piece provided in an embodiment of the present application.
  • the aluminum-plastic film shell prepared by the related technology is a cubic structure, which cannot adapt to the arc structure of the arc-shaped battery cell. This makes the fixing effect of the arc-shaped battery cell in the aluminum-plastic film shell prepared by the related technology poor. Therefore, in the actual application of the arc-shaped battery, relative movement is likely to occur between the arc-shaped battery cell and the aluminum-plastic film shell, which will increase the probability of problems such as short circuit and fire of the positive and negative electrodes in the battery cell. In other words, the safety of the arc-shaped battery prepared based on the related technology is poor.
  • Figure 1 is a structural schematic diagram of a battery provided in an embodiment of the present application.
  • the battery includes: a first half shell 10, a second half shell 20 and an arc-shaped battery cell 30, the first half shell 10 and the second half shell 20 are connected to enclose and form an arc-shaped storage cavity matching the arc-shaped battery cell 30, and the arc-shaped battery cell 30 is accommodated in the arc-shaped storage cavity.
  • first half shell 10 and the second half shell 20 can both be understood as aluminum-plastic film shells, and the first half shell 10 and the second half shell 20 cover each other to form the aforementioned arc-shaped accommodation cavity.
  • the structure of the aluminum-plastic film shell is adapted to the structure of the arc-shaped battery cell 30, so as to facilitate the packaging operation of the arc-shaped battery cell 30 in the aluminum-plastic film shell and improve the fixing effect of the arc-shaped battery cell 30 in the aluminum-plastic film shell, thereby reducing the probability of relative movement between the arc-shaped battery cell 30 and the aluminum-plastic film shell, thereby achieving the technical effect of improving the safety of the arc-shaped battery; and the above-mentioned setting can also make full use of the space in the aluminum-plastic film shell by the arc-shaped battery cell 30, so that the arc-shaped battery can maintain a higher energy density.
  • the first half shell 10 includes a first curved plate 11 opposite to the second half shell 20
  • the second half shell 20 includes a second curved plate 21 opposite to the first half shell 10 ;
  • the first curved surface of the curved battery cell 30 is opposite to the first curved plate 11
  • the second curved surface of the curved battery cell 30 is opposite to the second curved plate 21 .
  • the first curved plate 11 and the second curved plate 21 provided in the embodiment of the present application can be formed by respectively performing convex stamping and concave stamping on the two aluminum-plastic film half shells of the related art. That is, by the above-mentioned stamping method, the aluminum-plastic film can be formed into an arc-shaped receiving cavity adapted to the structural characteristics of the arc-shaped battery cell 30 while maintaining a relatively low thickness without changing the aluminum-plastic film manufacturing process (that is, after the aforementioned aluminum-plastic film half shells are prepared, an additional stamping process is added). This can effectively improve the manufacturing efficiency of the first half shell 10 and the second half shell 20.
  • the aforementioned arc-shaped battery cell 30 can be understood as a battery cell formed by a plurality of arc-shaped pole pieces in a stacked or wound manner, and the arc-shaped battery cell 30 includes a first arc surface and a second arc surface arranged back to back, the first arc surface is opposite to the first arc plate 11, and the second arc surface is opposite to the second arc plate 21.
  • the first half shell 10 includes an annular first flange plate 12
  • the second half shell 20 includes an annular second flange plate 22, and the first flange plate 12 and the second flange plate 22 are connected to seal the arc-shaped receiving cavity.
  • the maximum distance between the plane where the first arc plate 11 is located and the plane where the first flange plate 12 is located is greater than or equal to 2 mm; and/or the minimum distance between the plane where the second arc plate 21 is located and the plane where the second flange plate 22 is located is greater than or equal to 0.3 mm.
  • the first flange plate 12 and the second flange plate 22 can be understood as being used to increase the contact area between the first half shell 10 and the second half shell 20 so as to facilitate the sealing process between the first half shell 10 and the second half shell 20 .
  • the curvature of the curved surface of the first curved plate 11 adapts to the first curved surface, which can be understood as: the distance between the inner curved surface of the first curved plate 11 and the first curved surface is equal everywhere;
  • the curvature of the curved surface of the second curved plate 21 adapts to the second curved surface, which can be understood as: the distance between the inner curved surface of the second curved plate 21 and the second curved surface is equal everywhere.
  • the difference between the curvature corresponding to the first curved plate 11 and the curvature corresponding to the second curved plate 21 is greater than or equal to 0 degrees and less than or equal to 10 degrees.
  • the arc-shaped battery cell 30 is adapted to the arc-shaped cavity, thereby ensuring that the arc-shaped battery cell 30 can obtain a better fixed position after being placed in the arc-shaped cavity; at the same time, ensuring that the arc-shaped battery formed can have a higher energy density.
  • the curvature corresponding to the first curved plate 11 can be understood as the curvature of the curved surface where the first curved plate 11 is located.
  • the curvature corresponding to the second curved plate 21 can be understood as the curvature of the curved surface where the second curved plate 21 is located.
  • a liquid injection hole 40 is provided on the first half shell 10 or the second half shell 20, and a sealing member 50 is sealed in the liquid injection hole 40;
  • a pole hole 60 is provided on the first half shell 10 or the second half shell 20, and a conductive member 70 is sealed in the pole hole 60, and one end of the conductive member 70 that penetrates into the pole hole 60 is electrically connected to the pole ear 31 of the arc-shaped battery cell 30.
  • the operation of injecting electrolyte into the arc-shaped receiving cavity can be facilitated by reserving the injection hole 40.
  • the injection hole 40 can be sealed by the sealing member 50 to prevent leakage of the electrolyte and external harmful substances (such as dust, water vapor, etc.) from entering the arc-shaped receiving cavity.
  • the pole hole 60 can cooperate with the conductive member 70 to lead out the pole ear 31 of the arc-shaped battery cell 30 .
  • the injection hole 40 and the pole hole 60 can both be opened in the first half shell 10; or, the injection hole 40 and the pole hole 60 can both be opened in the second half shell 20; or, the injection hole 40 is opened in the first half shell 10, and the pole hole 60 is opened in the second half shell 20; or, the injection hole 40 is opened in the second half shell 20, and the pole hole 60 is opened in the first half shell 10.
  • the injection hole 40 and the pole hole 60 can be opened on the same end surface of the target half shell, or can be opened on different end surfaces of the target half shell respectively.
  • the target half shell can be understood as the first half shell 10 or the second half shell 20.
  • the first half shell 10 is convex in a direction away from the second half shell 20
  • the second half shell 20 is concave inward toward the first half shell 10
  • the pole hole 60 and the injection hole 40 are both arranged on the end surface of the first half shell 10 .
  • the first half shell 10 can be understood as a half shell formed by convex stamping of the aluminum-plastic film half shell
  • the second half shell 20 can be understood as a half shell formed by concave stamping of the aluminum-plastic film half shell. Since the end surface area of the first half shell 10 is larger than the end surface area of the second half shell 20, in a preferred embodiment, the pole hole 60 and the injection hole 40 can be selected to be arranged on the end surface of the first half shell 10 to avoid the smaller end surface area of the second half shell 20 interfering with the arrangement of the pole hole 60 or the injection hole 40.
  • the conductive member 70 includes a pole 71 and a connecting piece 74; the pole 71 passes through the pole hole 60 and extends into the arc-shaped receiving cavity, and one end of the pole 71 extending into the arc-shaped receiving cavity is electrically connected to the pole ear 31 of the arc-shaped battery cell 30 through the connecting piece 74.
  • the conductive member 70 also includes an inner insulating pad 73 and an outer insulating pad 72
  • the pole 71 includes an inner end 712 and an outer end 713
  • the first surface of the connecting piece 74 is respectively in contact with the pole ear 31 of the arc-shaped battery cell 30 and the inner end 712
  • the inner insulating pad 73 is located between the second surface of the connecting piece 74 and the inner surface of the target half shell
  • the outer insulating pad 72 is located between the outer surface of the target half shell and the outer end 713
  • the target half shell is the first half shell 10 or the second half shell 20.
  • the diameter of the inner end portion 712 is larger than the diameter of the column portion 711 , and the diameter of the outer end portion 713 is larger than the diameter of the column portion 711 ;
  • the outer insulating pad 72 abuts against the outer surface of the target half shell
  • the inner insulating pad 73 abuts against the inner surface of the target half shell, and the two work together to separate the pole 71 from the target half shell to avoid short circuit problems caused by mutual contact between the pole 71 and the target half shell.
  • connection piece 74 is provided, on the one hand, to increase the contact surface between the inner end 712 of the pole 71 and the pole lug 31 of the arc-shaped battery cell 30, so as to ensure the stability of the electrical connection between the pole 71 and the pole lug 31 of the arc-shaped battery cell 30; on the other hand, it is provided to cooperate with the inner insulating pad 73 and the outer insulating pad 72, and to fix the pole 71 on the target half shell by riveting.
  • the outer insulating pad 72 includes an insulating tube portion and an annular extension portion located at one end of the insulating tube portion, the insulating tube portion passes through the pole hole 60, and the outer surface of the insulating tube portion abuts against the inner wall of the pole hole 60, the outer surface of the column portion 711 abuts against the inner surface of the insulating tube portion, and the outer end portion 713 of the pole 71 abuts against a side of the extension portion away from the arc-shaped battery cell 30 (that is, the second side of the outer insulating pad 72).
  • the thickness of the insulating tube portion can be limited to the sum of the thickness of the extension portion, the thickness of the target half shell and the thickness of the inner insulating pad 73.
  • a portion of the first surface of the connecting piece 74 contacts the tab 31 of the arc-shaped battery cell 30 , and another portion of the first surface of the connecting piece 74 contacts the inner end 712 of the pole 71 to achieve electrical connection between the pole 71 and the tab 31 of the arc-shaped battery.
  • pole piece forming the arc-shaped battery cell 30 is also arc-shaped, and the curvature of the arc-shaped battery cell 30 is consistent with the curvature of the pole piece forming the arc-shaped battery cell 30, but the portion of the pole ear 31 protruding outward from the pole piece is a plane.
  • the orthographic projection of the outer end portion 713 on the outer insulating pad 72 is located in the outer insulating pad 72
  • the orthographic projection of the inner end portion 712 on the inner insulating pad 73 is located in the inner insulating pad 73
  • the orthographic projection of the connecting piece 74 on the inner insulating pad 73 is located in the inner insulating pad 73.
  • a first avoidance groove 731 is provided at the end of the inner insulating pad 73 close to the first half shell 10 ; and/or a second avoidance groove 741 is provided at the end of the connecting piece 74 close to the first half shell 10 .
  • the first avoidance groove 731 is provided on the inner insulating pad 73, which can be understood as that the arc-shaped area of the arc-shaped receiving cavity can be avoided by cutting the arc-shaped area of the inner insulating pad 73 close to the arc-shaped receiving cavity (that is, the end of the first half shell 10) (the cut portion of the inner insulating pad 73 forms the aforementioned first avoidance groove 731), so that the inner insulating pad 73 can be smoothly placed in the arc-shaped receiving cavity.
  • setting the second avoidance groove 741 on the connecting piece 74 can be understood as that by cutting the arc-shaped area of the connecting piece 74 close to the arc-shaped receiving cavity (that is, the end of the first half shell 10) (the cut portion of the connecting piece 74 forms the aforementioned second avoidance groove 741), the arc-shaped area of the arc-shaped receiving cavity can be avoided, so that the connecting piece 74 can be smoothly placed in the arc-shaped receiving cavity.
  • the conductive member 70 further includes a transfer plate; a first surface of the transfer plate close to the arc-shaped battery cell 30 abuts against the pole ear 31 of the arc-shaped battery cell 30 , and a second surface of the transfer plate away from the arc-shaped battery cell 30 abuts against the first surface of the connecting plate 74 close to the arc-shaped battery cell 30 .
  • the pole ears 31 of the arc-shaped battery cell 30 are objects formed by welding and kneading the reserved inner pole ear parts of multiple pole pieces, which will cause the surface flatness of the pole ears 31 of the arc-shaped battery cell 30 to be poor, and it is easy to produce problems such as cold welding when welding with the connecting piece 74.
  • the embodiment of the present application bends the pole ears 31 of the arc-shaped battery cell 30, and welds a "U"-shaped adapter sheet in the concave area formed by the bending of the pole ears 31, so as to avoid the cold welding problem caused by the poor surface flatness of the pole ears 31 of the arc-shaped battery cell 30.
  • the adapter sheet with better flatness is used as the extension part of the pole ears 31 of the arc-shaped battery cell 30, and is welded to the connecting piece 74 to ensure that a stable connection relationship is formed between the pole ears 31 of the arc-shaped battery cell 30 and the connecting piece 74, thereby reducing the probability of poor contact problems of the arc battery due to cold welding, and further reducing the defective rate of the prepared arc battery.
  • the end surface of the first half shell 10 includes a first pressure relief zone and a first non-pressure relief zone, and the thickness of the first pressure relief zone is less than the thickness of the first non-pressure relief zone; and/or, the end surface of the second half shell 20 includes a second pressure relief zone and a second non-pressure relief zone, and the thickness of the second pressure relief zone is less than the thickness of the second non-pressure relief zone.
  • the end surface of the first half shell 10 is thinned by laser or other methods (the thinned area is the aforementioned first pressure relief area, and the area not thinned is the aforementioned first non-pressure relief area), which can When a high pressure condition occurs in the arc-shaped receiving cavity, the high pressure gas in the arc-shaped receiving cavity can be released through the first pressure relief area to avoid explosion of the arc-shaped battery, thereby ensuring the safety of the arc-shaped battery.
  • the end surface of the second half shell 20 is thinned, and the thinned area is the aforementioned second pressure relief zone.
  • the purpose of setting the second pressure relief zone is the same as that of the first pressure relief zone, and will not be repeated to avoid repetition.

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

Abstract

一种电池，包括：第一半壳体、第二半壳体和弧形电芯，所述第一半壳体和所述第二半壳体连接，以围合形成与所述弧形电芯匹配的弧形容置腔，所述弧形电芯容置于所述弧形容置腔内。通过弧形容置腔的设置，使铝塑膜外壳的结构与弧形电芯的结构相适配，以便于弧形电芯在铝塑膜外壳内的封装操作，并提升弧形电芯在铝塑膜外壳内的固定效果，从而降低弧形电芯与铝塑膜外壳之间出现相对移动的概率，进而达到提升弧形电池的安全性的技术效果；并且，上述设置还能使铝塑膜外壳内的空间被弧形电芯充分利用，使得弧形电池能够维持较高的能量密度。

Description

电池 技术领域
本申请涉及电池技术领域，具体涉及一种电池。
发明背景
穿戴式电子产品需要使用弧形电池(可理解为应用弧形极片生成的电池)，目前，相关技术所制备的铝塑膜外壳为立方体结构，无法适配弧形电芯的弧形结构，这使得弧形电芯在相关技术所制备的铝塑膜外壳内的固定效果较差，从而导致基于相关技术所制备的弧形电池的安全性较差。
发明内容
本申请实施例的目的在于提供一种电池，用于解决相关技术所制备的弧形电池存在的安全性较差的问题。
本申请实施例提供一种电池，包括：第一半壳体、第二半壳体和弧形电芯，所述第一半壳体和所述第二半壳体连接，以围合形成与所述弧形电芯匹配的弧形容置腔，所述弧形电芯容置于所述弧形容置腔内。
可选的，所述第一半壳体包括与所述第二半壳体相对的第一弧形板，所述第二半壳体包括与所述第一半壳体相对的第二弧形板；所述弧形电芯的靠近所述第一半壳体的第一弧面与所述第一弧形板相对，所述弧形电芯的靠近所述第二半壳体的第二弧面与所述第二弧形板相对。
可选的，所述第一半壳体包括环形的第一法兰板，所述第二半壳体包括环形的第二法兰板，所述第一法兰板和所述第二法兰板连接，以密封所述弧形容置腔。
可选的，在所述第一半壳体朝背离所述第二半壳体的方向外凸的情况下，沿所述第二半壳体至所述第一半壳体的方向，所述第一弧形板的距离所述第二半壳体最远的切面与所述第一法兰板所在平面之间的距离大于或等于2毫米。
可选的，在所述第二半壳体朝向所述第一半壳体内凹的情况下，沿所述第二半壳体至所述第一半壳体的方向，所述第二弧形板的距离所述第一半壳体最近的切面与所述第二法兰板所在平面之间的距离大于或等于0.3毫米。
可选的，所述第一弧形板对应的弧度与所述第二弧形板对应的弧度之差大于或等于0度，且小于或等于10度。
可选的，所述第一半壳体上或所述第二半壳体上设置有注液孔，所述注液孔内密封设置有密封件。
可选的，所述第一半壳体上或所述第二半壳体上设置有极柱孔，所述极柱孔内密封设置有导电件，所述导电件穿入所述极柱孔的一端与所述弧形电芯的极耳电连接。
可选的，在所述第一半壳体朝背离所述第二半壳体的方向外凸，且所述第二半壳体朝向所述第一半壳体内凹的情况下，所述第一半壳体的端面上设置有极柱孔以及注液孔。
可选的，所述导电件包括极柱和连接片；所述极柱穿过所述极柱孔并伸入所述弧形容置腔内，所述极柱伸入所述弧形容置腔内的一端通过所述连接片与所述弧形电芯的极耳电连接。
可选的，所述导电件还包括内绝缘垫和外绝缘垫，所述极柱包括内端部和外端部；所述连接片的靠近所述弧形电芯的第一面分别与所述弧形电芯的极耳和所述内端部抵接。
可选的，所述内绝缘垫位于所述连接片的远离所述弧形电芯的第二面与所述极柱孔所在的所述第一半壳体的内表面之间，或者，所述内绝缘垫位于所述连接片的远离所述弧形电芯的第二面与所述极柱孔所在的所述第二半壳体的内表面之间。
可选的，所述外绝缘垫位于所述极柱孔所在的所述第一半壳体的外表面与所述外端部之间，或者，所述外绝缘垫位于所述极柱孔所在的所述第二半壳体的外表面与所述外端部之间。
可选的，所述外端部在所述外绝缘垫上的正投影位于所述外绝缘垫中，所述内端部在所述内绝缘垫上的正投影位于所述内绝缘垫中，所述连接片在所述内绝缘垫上的正投影位于所述内绝缘垫中。
可选的，所述导电件还包括转接片；所述转接片的靠近所述弧形电芯的第一面与所述弧形电芯的极耳抵接，所述转接片的远离所述弧形电芯的第二面与所述连接片的靠近所述弧形电芯的第一面抵接。
可选的，所述内绝缘垫的靠近所述极柱孔所在的所述第一半壳体的端部设置有第一避让槽；或者，所述内绝缘垫的靠近所述极柱孔所在的所述第二半壳体的端部设置有第一避让槽。
可选的，所述连接片的靠近所述极柱孔所在的所述第一半壳体的端部设置有第二避让槽，或者，所述连接片的靠近所述极柱孔所在的所述第二半壳体的端部设置有第二避让槽。
可选的，所述外绝缘垫包括穿过所述极柱孔的绝缘管部以及位于所述绝缘管部的远离所述弧形电芯的一端的环形的外延部，沿所述内端部至所述外端部的方向，所述绝缘管部的厚度等于下述厚度中的一个：所述外延部的厚度、所述内绝缘垫的厚度以及所述极柱孔所在的所述第一半壳体的厚度之和；所述外延部的厚度、所述内绝缘垫的厚度以及所述极柱孔所在的所述第二半壳体的厚度之和。
可选的，所述第一半壳体的端面包括第一泄压区和第一非泄压区，所述第一泄压区的厚度小于所述第一非泄压区的厚度。
可选的，所述第二半壳体的端面包括第二泄压区和第二非泄压区，所述第二泄压区的厚度小于所述第二非泄压区的厚度。
上述技术方案具有如下优点或有益效果：在本申请实施例中，通过弧形容置腔的设置，使铝塑膜外壳的结构与弧形电芯的结构相适配，以便于弧形电芯在铝塑膜外壳内的封装操作，并提升弧形电芯在铝塑膜外壳内的固定效果，从而降低弧形电芯与铝塑膜外壳之间出现相对移动的概率，进而达到提升弧形电池的安全性的技术效果；并且，上述设置还能使铝塑膜外壳内的空间被弧形电芯充分利用，使得弧形电池能够维持较高的能量密度。
附图简要说明
图1是本申请实施例提供的一种电池的爆炸图。
图2是本申请实施例提供的一种第一半壳体的示意图。
图3是本申请实施例提供的一种第二半壳体的示意图。
图4是本申请实施例提供的一种电池的结构示意图之一。
图5是本申请实施例提供的一种电池的结构示意图之二。
图6是图5中A-A处的剖面图。
图7是图6中B处的放大示意图。
图8是本申请实施例提供的一种极柱的示意图。
图9是本申请实施例提供的一种内绝缘垫和连接片的示意图。
附图说明：10、第一半壳体；11、第一弧形板；12、第一法兰板；20、第二半壳体；21、第二弧形板；22、第二法兰板；30、弧形电芯；31、极耳；40、注液孔；50、密封件；60、极柱孔；70、导电件；71、极柱；711、柱部；712、内端部；713、外端部；72、外绝缘垫；73、内绝缘垫；731、第一避让槽；74、连接片；741、第二避让槽。
实施本发明的方式
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。
目前，相关技术所制备的铝塑膜外壳为立方体结构，无法适配弧形电芯的弧形结构，这使得弧形电芯在相关技术所制备的铝塑膜外壳内的固定效果较差，因此，在弧形电池的实际应用过程中，弧形电芯与铝塑膜外壳之间易出现相对移动，这会导致电芯内正负极短路起火等问题的出现概率增加，也就是说，基于相关技术所制备的弧形电池的安全性较差。
请参阅图1，图1是本申请实施例提供的一种电池的结构示意图，如图1所示，所述电池包括：第一半壳体10、第二半壳体20和弧形电芯30，所述第一半壳体10和所述第二半壳体20连接，以围合形成与所述弧形电芯30匹配的弧形容置腔，所述弧形电芯30容置于所述弧形容置腔内。
示例性的，第一半壳体10和第二半壳体20均可理解为铝塑膜壳体，第一半壳体10和第二半壳体20相互盖合，即形成前述弧形容置腔。
如上，通过弧形容置腔的设置，使铝塑膜外壳的结构与弧形电芯30的结构相适配，以便于弧形电芯30在铝塑膜外壳内的封装操作，并提升弧形电芯30在铝塑膜外壳内的固定效果，从而降低弧形电芯30与铝塑膜外壳之间出现相对移动的概率，进而达到提升弧形电池的安全性的技术效果；并且，上述设置还能使铝塑膜外壳内的空间被弧形电芯30充分利用，使得弧形电池能够维持较高的能量密度。
可选的，如图2和3所示，所述第一半壳体10包括与所述第二半壳体20相对的第一弧形板11，所述第二半壳体20包括与所述第一半壳体10相对的第二弧形板21；
所述弧形电芯30的第一弧面与所述第一弧形板11相对，所述弧形电芯30的第二弧面与所述第二弧形板21相对。
通过对相关技术的两个铝塑膜半壳体分别进行凸面冲压和凹面冲压，能够形成本申请实施例所提供的第一弧形板11和第二弧形板21，即通过上述冲压的方式，可以在不改变铝塑膜制造工艺的情况下，(即，在制备得到前述铝塑膜半壳体之后，额外增设一道冲压工序)，使铝塑膜在维持较低厚度的前提下，能形成适配弧形电芯30结构特点的弧形容置腔，这能有效提高第一半壳体10和第二半壳体20的制作效率。
需要指出的是，前述弧形电芯30可理解为多个弧形极片以叠片方式或卷绕方式形成的电芯，所述弧形电芯30包括相背设置的第一弧面和第二弧面，所述第一弧面与第一弧形板11相对，所述第二弧面与所述第二弧形板21相对。
可选的，所述第一半壳体10包括环形的第一法兰板12，所述第二半壳体20包括环形的第二法兰板22，所述第一法兰板12和所述第二法兰板22连接，以密封所述弧形容置腔。
进一步的，所述第一弧形板11所在平面与所述第一法兰板12所在平面之间的最大距离大于或等于2毫米；和/或，所述第二弧形板21所在平面与所述第二法兰板22所在平面之间的最小距离大于或等于0.3毫米。
前述第一法兰板12和第二法兰板22可理解为：用于增大第一半壳体10和第二半壳体20之间的接触面积，以便于第一半壳体10和第二半壳体20进行密封处理。
如图4和图5所示，通过限定所述第一弧形板11所在平面与所述第一法兰板12所在平面之间的最大距离(即图5中参数a所指示距离)大于或等于2毫米，能够确保第一弧形板11的弧面具备足够适配第一弧面的弧度；同理，通过限定所述第二弧形板21所在平面与所述第二法兰板22所在平面之间的最小距离(即图5中参数b所指示距离)大于或等于0.3毫米，能够确保第二弧形板21的弧面具备足够适配第二弧面的弧度。
第一弧形板11的弧面的弧度适配第一弧面可理解为：第一弧形板11的内弧面与所述第一弧面之间的间距处处相等；第二弧形板21的弧面的弧度适配第二弧面可理解为：第二弧形板21的内弧面与所述第二弧面之间的间距处处相等。
可选的，所述第一弧形板11对应的弧度与所述第二弧形板21对应的弧度之差大于或等于0度，且小于或等于10度。
如上所述，通过将所述第一弧形板11对应的弧度与所述第二弧形板21对应的弧度之差限制在0度至10度的范围内，能够避免第一弧形板11对应的弧度与所述第二弧形板21对应的弧度相差过大而导致无法与弧形电芯30的两个弧面相 适配的情况，从而确保弧形电芯30在放置于弧形容置腔以后，能获得较好的固定限位；同时确保所形成的弧形电池能具备较高的能量密度。
第一弧形板11对应的弧度可理解为第一弧形板11所在弧面的弧度，同理，第二弧形板21对应的弧度可理解为第二弧形板21所在弧面的弧度。
可选的，如图1和4所示，所述第一半壳体10上或所述第二半壳体20上设置有注液孔40，所述注液孔40内密封设置有密封件50；所述第一半壳体10上或所述第二半壳体20上设置有极柱孔60，所述极柱孔60内密封设置有导电件70，所述导电件70穿入所述极柱孔60的一端与所述弧形电芯30的极耳31电连接。
如图1所示，在弧形电芯30放置于弧形容置腔以后，通过预留注液孔40，可便于电解液注入弧形容置腔的操作。待电解液注入完成以后，可通过密封件50对注液孔40进行封闭，以避免电解液的泄露以及外部有害物质(例如灰尘、水气等)进入弧形容置腔内。
极柱孔60能够配合导电件70对弧形电芯30的极耳31进行引出。
需要说明的是，实际应用中，可以将注液孔40和极柱孔60可以均开设于第一半壳体10；或者，将注液孔40和极柱孔60可以均开设于第二半壳体20上；或者，将注液孔40开设于第一半壳体10上，而将极柱孔60开设于第二半壳体20上；或者，将注液孔40开设于第二半壳体20上，而将极柱孔60开设于第一半壳体10上。
在注液孔40和极柱孔60均开设于目标半壳体的情况下，注液孔40和极柱孔60可以开设于目标半壳体的同一端面上，也可以分别开设于目标半壳体的不同端面上，目标半壳体可理解为第一半壳体10或第二半壳体20。
可选的，所述第一半壳体10朝背离所述第二半壳体20的方向外凸，所述第二半壳体20朝向所述第一半壳体10内凹，所述极柱孔60以及所述注液孔40均设置于所述第一半壳体10的端面上。
在本申请中，第一半壳体10可理解为对铝塑膜半壳体进行凸面冲压后形成的半壳体，第二半壳体20可理解为对铝塑膜半壳体进行凹面冲压后形成的半壳体，由于第一半壳体10的端面面积大于第二半壳体20的端面面积，因此，在一优选实施方式中，可选择将极柱孔60以及注液孔40均设置第一半壳体10的端面上，以避免第二半壳体20的较小的端面面积对极柱孔60或注液孔40的设置造成干扰。
可选的，如图1、4和7所示，所述导电件70包括极柱71和连接片74；所述极柱71穿过所述极柱孔60并伸入所述弧形容置腔内，所述极柱71伸入所述弧形容置腔内的一端通过所述连接片74与所述弧形电芯30的极耳31电连接。
进一步的，如图4、7和8所示，所述导电件70还包括内绝缘垫73和外绝缘垫72，所述极柱71包括内端部712和外端部713；所述连接片74的第一面分别与所述弧形电芯30的极耳31和所述内端部712抵接，所述内绝缘垫73位于所述连接片74的第二面与目标半壳体的内表面之间，所述外绝缘垫72位于所述目标半壳体的外表面与所述外端部713之间，所述目标半壳体为所述第一半壳体10或所述第二半壳体20。
所述内端部712的直径大于所述柱部711的直径，所述外端部713的直径大于所述柱部711的直径；
如图6和图7所示，外绝缘垫72与目标半壳体的外表面相抵，内绝缘垫73与目标半壳体的内表面相抵，两者共同配合，以对极柱71与目标半壳体进行分隔，避免极柱71和目标半壳体因相互接触而产生的短路问题。
连接片74的设置，一方面是为了增大极柱71的内端部712与弧形电芯30的极耳31之间的接触面，以确保极柱71与弧形电芯30的极耳31之间电连接的稳定性；另一方面是为了配合内绝缘垫73以及外绝缘垫72，通过铆接的方式，实现极柱71在目标半壳体上的固定。
示例性的，如图1、7和图8所示，外绝缘垫72包括绝缘管部以及位于所述绝缘管部一端的环形的外延部，所述绝缘管部穿过所述极柱孔60，且绝缘管部的外表面与所述极柱孔60的内壁相抵，所述柱部711的外表面与所述绝缘管部的内表面相抵，所述极柱71的外端部713与所述外延部远离所述弧形电芯30的一面(也即外绝缘垫72的第二面)抵接。
需要指出的是，在确保极柱71在目标半壳体上的固定效果的前提下，为使弧形电池具备较高的能量密度，也即对弧形电池内的有限空间进行充分应用，以使弧形电芯30在弧形容置腔内获得较充裕的放置空间，可限定绝缘管部的厚度为所述外延部的厚度、所述目标半壳体的厚度以及所述内绝缘垫73的厚度之和。
连接片74的第一面的一部分区域与弧形电芯30的极耳31相接触，连接片74的第一面的另一部分区域与极柱71的内端部712相接触，以实现极柱71与弧形电池的极耳31之间的电连接。
需要说明的是，形成弧形电芯30的极片也为弧形，且弧形电芯30的弧度和形成弧形电芯30的极片的弧度保持一致，但所述极片向外探出的极耳31的部分为平面。
可选的，所述外端部713在所述外绝缘垫72上的正投影位于所述外绝缘垫72中，所述内端部712在所述内绝缘垫73上的正投影位于所述内绝缘垫73中，所述连接片74在所述内绝缘垫73上的正投影位于所述内绝缘垫73中。
通过上述设置，能够确保通过外绝缘垫72，将极柱71的外端部713与目标半壳体的外表面进行充分分隔，同时确保通过内绝缘垫73，将极柱71的内端部712以及连接片74与目标半壳体的内表面进行充分分隔，从而避免极柱71和目标半壳体因相互接触而产生的短路问题。
可选的，如图7和9所示，所述内绝缘垫73的靠近所述第一半壳体10的端部设置有第一避让槽731；和/或，所述连接片74的靠近所述第一半壳体10的端部设置有第二避让槽741。
在内绝缘垫73上设置第一避让槽731可理解为，通过对内绝缘垫73靠近弧形容置腔的弧形区域(也即第一半壳体10的端部)进行削减(内绝缘垫73经过削减的部分即形成前述第一避让槽731)，能够避让弧形容置腔的弧形区域，使内绝缘垫73得以顺利放置于弧形容置腔内。
同理，在连接片74上设置第二避让槽741可理解为，通过对连接片74靠近弧形容置腔的弧形区域(也即第一半壳体10的端部)进行削减(连接片74经过削减的部分即形成前述第二避让槽741)，能够避让弧形容置腔的弧形区域，使连接片74得以顺利放置于弧形容置腔内。
可选的，所述导电件70还包括转接片；所述转接片的靠近所述弧形电芯30的第一面与所述弧形电芯30的极耳31抵接，所述转接片的远离所述弧形电芯30的第二面与所述连接片74的靠近所述弧形电芯30的第一面抵接。
如上所述，在弧形电芯30为多极耳的情况下，弧形电芯30的极耳31为多个极片的预留的内极耳部分经焊接揉压形成的物体，这会导致弧形电芯30的极耳31的表面平整度较差，在与连接片74进行焊接时易产虚焊等问题，而本申请实施例通过对弧形电芯30的极耳31进行弯折，并在极耳31弯折所形成的凹区焊接“U”型的转接片，可规避弧形电芯30的极耳31因表面平整度较差带来的虚焊问题，即利用平整度较优的转接片作为弧形电芯30的极耳31的外延部分，与连接片74进行焊接处理，以确保弧形电芯30的极耳31和连接片74之间得以形成稳固的连接关系，从而降低弧形电池因虚焊而产生接触不良问题的概率，进而降低所制备得到的弧形电池的次品率。
可选的，所述第一半壳体10的端面包括第一泄压区和第一非泄压区，所述第一泄压区的厚度小于所述第一非泄压区的厚度；和/或，所述第二半壳体20的端面包括第二泄压区和第二非泄压区，所述第二泄压区的厚度小于所述第二非泄压区的厚度。
如上，通过激光等方式对第一半壳体10上的端面进行减薄处理(减薄处理的区域即为前述第一泄压区，未经过减薄处理的区域即前述第一非泄压区)，能 够在弧形容置腔出现高压状况时，经由该第一泄压区对弧形容置腔的高压气体进行释放，以避免弧形电池出现爆炸，以此来保障弧形电池的使用安全。
同理，对第二半壳体20上的端面进行减薄处理，减薄处理的区域即为前述第二泄压区，第二泄压区的设置目的与第一泄压区的设置目的相同，为避免重复，便不再赘述。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (20)

  1. 一种电池，其特征在于，包括：第一半壳体、第二半壳体和弧形电芯，所述第一半壳体和所述第二半壳体连接，以围合形成与所述弧形电芯匹配的弧形容置腔，所述弧形电芯容置于所述弧形容置腔内。
  2. 根据权利要求1所述的电池，其特征在于，所述第一半壳体包括与所述第二半壳体相对的第一弧形板，所述第二半壳体包括与所述第一半壳体相对的第二弧形板；
    所述弧形电芯的靠近所述第一半壳体的第一弧面与所述第一弧形板相对，所述弧形电芯的靠近所述第二半壳体的第二弧面与所述第二弧形板相对。
  3. 根据权利要求2所述的电池，其特征在于，所述第一半壳体包括环形的第一法兰板，所述第二半壳体包括环形的第二法兰板，所述第一法兰板和所述第二法兰板连接，以密封所述弧形容置腔。
  4. 根据权利要求3所述的电池，其特征在于，在所述第一半壳体朝背离所述第二半壳体的方向外凸的情况下，沿所述第二半壳体至所述第一半壳体的方向，所述第一弧形板的距离所述第二半壳体最远的切面与所述第一法兰板所在平面之间的距离大于或等于2毫米。
  5. 根据权利要求3或4所述的电池，其特征在于，在所述第二半壳体朝向所述第一半壳体内凹的情况下，沿所述第二半壳体至所述第一半壳体的方向，所述第二弧形板的距离所述第一半壳体最近的切面与所述第二法兰板所在平面之间的距离大于或等于0.3毫米。
  6. 根据权利要求2至5中任一项所述的电池，其特征在于，所述第一弧形板对应的弧度与所述第二弧形板对应的弧度之差大于或等于0度，且小于或等于10度。
  7. 根据权利要求1至6中任一项所述的电池，其特征在于：
    所述第一半壳体上或所述第二半壳体上设置有注液孔，所述注液孔内密封设置有密封件。
  8. 根据权利要求1至7中任一项所述的电池，其特征在于：
    所述第一半壳体上或所述第二半壳体上设置有极柱孔，所述极柱孔内密封设置有导电件，所述导电件穿入所述极柱孔的一端与所述弧形电芯的极耳电连接。
  9. 根据权利要求1至6中任一项所述的电池，其特征在于，在所述第一半壳体朝背离所述第二半壳体的方向外凸，且所述第二半壳体朝向所述第一半壳体内凹的情况下，所述第一半壳体的端面上设置有极柱孔以及注液孔。
  10. 根据权利要求8所述的电池，其特征在于，所述导电件包括极柱和连接 片；
    所述极柱穿过所述极柱孔并伸入所述弧形容置腔内，所述极柱伸入所述弧形容置腔内的一端通过所述连接片与所述弧形电芯的极耳电连接。
  11. 根据权利要求10所述的电池，其特征在于，所述导电件还包括内绝缘垫和外绝缘垫，所述极柱包括内端部和外端部；
    所述连接片的靠近所述弧形电芯的第一面分别与所述弧形电芯的极耳和所述内端部抵接。
  12. 根据权利要求11所述的电池，其特征在于，所述内绝缘垫位于所述连接片的远离所述弧形电芯的第二面与所述极柱孔所在的所述第一半壳体的内表面之间，
    或者，所述内绝缘垫位于所述连接片的远离所述弧形电芯的第二面与所述极柱孔所在的所述第二半壳体的内表面之间。
  13. 根据权利要求11或12所述的电池，其特征在于，所述外绝缘垫位于所述极柱孔所在的所述第一半壳体的外表面与所述外端部之间，
    或者，所述外绝缘垫位于所述极柱孔所在的所述第二半壳体的外表面与所述外端部之间。
  14. 根据权利要求11至13中任一项所述的电池，其特征在于，所述外端部在所述外绝缘垫上的正投影位于所述外绝缘垫中，所述内端部在所述内绝缘垫上的正投影位于所述内绝缘垫中，所述连接片在所述内绝缘垫上的正投影位于所述内绝缘垫中。
  15. 根据权利要求10至14中任一项所述的电池，其特征在于，所述导电件还包括转接片；
    所述转接片的靠近所述弧形电芯的第一面与所述弧形电芯的极耳抵接，所述转接片的远离所述弧形电芯的第二面与所述连接片的靠近所述弧形电芯的第一面抵接。
  16. 根据权利要求11至14中任一项所述的电池，其特征在于，所述内绝缘垫的靠近所述极柱孔所在的所述第一半壳体的端部设置有第一避让槽；
    或者，所述内绝缘垫的靠近所述极柱孔所在的所述第二半壳体的端部设置有第一避让槽。
  17. 根据权利要求11至14、16中任一项所述的电池，其特征在于，所述连接片的靠近所述极柱孔所在的所述第一半壳体的端部设置有第二避让槽，
    或者，所述连接片的靠近所述极柱孔所在的所述第二半壳体的端部设置有第二避让槽。
  18. 根据权利要求11至14、16、17中任一项所述的电池，其特征在于，所 述外绝缘垫包括穿过所述极柱孔的绝缘管部以及位于所述绝缘管部的远离所述弧形电芯的一端的环形的外延部，
    沿所述内端部至所述外端部的方向，所述绝缘管部的厚度等于下述厚度中的一个：
    所述外延部的厚度、所述内绝缘垫的厚度以及所述极柱孔所在的所述第一半壳体的厚度之和；
    所述外延部的厚度、所述内绝缘垫的厚度以及所述极柱孔所在的所述第二半壳体的厚度之和。
  19. 根据权利要求1至18中任一项所述的电池，其特征在于，所述第一半壳体的端面包括第一泄压区和第一非泄压区，所述第一泄压区的厚度小于所述第一非泄压区的厚度。
  20. 根据权利要求1至19中任一项所述的电池，其特征在于，所述第二半壳体的端面包括第二泄压区和第二非泄压区，所述第二泄压区的厚度小于所述第二非泄压区的厚度。
PCT/CN2023/114672 2022-10-08 2023-08-24 电池 WO2024074083A1 (zh)

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