WO2023246075A1 - 电池壳体及电池 - Google Patents

电池壳体及电池 Download PDF

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Publication number
WO2023246075A1
WO2023246075A1 PCT/CN2022/143963 CN2022143963W WO2023246075A1 WO 2023246075 A1 WO2023246075 A1 WO 2023246075A1 CN 2022143963 W CN2022143963 W CN 2022143963W WO 2023246075 A1 WO2023246075 A1 WO 2023246075A1
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WIPO (PCT)
Prior art keywords
explosion
groove
battery case
battery
proof
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PCT/CN2022/143963
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English (en)
French (fr)
Inventor
贺孝武
舒宽金
邓振
郑旭
谭余沐
何巍
Original Assignee
湖北亿纬动力有限公司
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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 US18/459,408 priority Critical patent/US20230411740A1/en
Publication of WO2023246075A1 publication Critical patent/WO2023246075A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements

Definitions

  • the pressure relief structure discharges the gas inside the battery case through the pressure relief structure when the battery expands, thereby preventing the battery from exploding.
  • the battery includes a battery case, a battery core and a cover plate. At least one end of the battery case is open, the battery core is accommodated inside the battery case, and the open end of the battery case is blocked by the cover plate.
  • the pressure relief structure is generally provided on the top cover.
  • an explosion-proof valve hole is opened through the top cover, and an explosion-proof disc is designed to block the explosion-proof valve hole.
  • the explosion-proof valve hole and the explosion-proof disc form a pressure relief structure.
  • This arrangement of the pressure relief structure in the related art has the following shortcomings: it requires punching holes in the top cover and additional design of explosion-proof discs, and the explosion-proof discs are made of special materials, which not only requires complicated processes but also high costs.
  • the embodiment of the present application provides a battery case with a simple structure and low cost.
  • Embodiments of the present application provide a battery that is easy to produce and has low cost.
  • a battery case including a case body.
  • the case body is formed by bending and welding a sheet-like plate material.
  • the plate material has a first end and a second end.
  • the case body After bending, the first end and the second end are welded, and the location where the first end and the second end are welded is extruded to form an explosion-proof groove.
  • the welding position of the first end and the second end forms a weld
  • the length of the explosion-proof groove extends along the length direction of the weld
  • the length of the explosion-proof groove is equal to the length of the weld seam.
  • the width of the explosion-proof groove is 0.3-2mm.
  • the explosion-proof groove extends to the first end and/or the second end.
  • the thickness d of the side wall of the shell body is greater than the depth h of the explosion-proof groove, and 0.15 ⁇ d ⁇ 0.7mm, 0.05 ⁇ h ⁇ 0.2mm.
  • the length of the shell body is 100-2500mm.
  • embodiments of the present application provide a battery, including the above-mentioned battery case.
  • the battery short-circuit When the battery short-circuit generates a large amount of gas inside the shell body, the high-pressure gas will break through the explosion-proof groove to relieve the pressure. There is no need to set additional explosion-proof holes and explosion-proof discs on the battery shell, which simplifies The structure of the battery casing is beneficial to reducing costs.
  • Figure 2 is a side view of a battery case from a first perspective according to an embodiment of the present application
  • Figure 4 is an enlarged view of position I in Figure 3;
  • Figure 5 is a side view from a second perspective when the first end and the second end of a battery case are not welded according to the embodiment of the present application;
  • Figure 6 is an enlarged view of II in Figure 5;
  • Figure 7 is a side view from a second perspective after the first end and the second end of a battery case are welded according to the embodiment of the present application;
  • Shell body 11. First end; 12. Second end; 2. Explosion-proof groove; 21. Groove side wall; 22. Groove bottom; 3. Gap.
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral body.
  • It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements.
  • the meanings of the above terms in this application can be understood according to the circumstances.
  • explosion-proof grooves 2 are formed at the two butt ends of the shell body 1.
  • the shell body 1 is welded The position is extruded and trimmed to strengthen the structural strength of the welding position of the shell body 1 and eliminate the bumps formed during the welding process, thereby improving the aesthetics of the shell body 1; in addition, by extruding the explosion-proof groove 2 at the welding position of the shell body 1, weakening The structural strength of the case body 1 at the position of the explosion-proof groove 2.
  • the length of the explosion-proof groove 2 is equal to the length of the weld. In this way, when the explosion-proof groove 2 is formed by extrusion at the position where the first end 11 and the second end 12 are welded, multiple positions of the weld are also extruded. Press trimming to prevent cracks in some untrimmed welds from affecting the sealing of the battery case.
  • the width w of the explosion-proof groove 2 is 0.3-2mm. If the width of the explosion-proof groove 2 is too large, when there is a short circuit inside the battery case, the pressure of the high-pressure gas inside the case body 1 will be too dispersed. It is difficult for high-pressure gas to break through the explosion-proof groove 2 and cause the pressure relief failure of the explosion-proof groove 2.
  • the explosion-proof groove 2 with a too small width is not convenient for extrusion and is not conducive to trimming the weld, and the structural strength of the weld cannot be guaranteed.
  • the explosion-proof groove 2 is extended respectively.
  • the first end 11 and the second end 12 both become part of the groove wall or the groove bottom 22 of the explosion-proof groove 2 .
  • the explosion-proof groove 2 may also be extended only to the first end 11 or the explosion-proof groove 2 may be extended only to the second end 12 .
  • the gap 3 between the first end 11 and the second end 12 before welding is 0.2-1mm.
  • explosion-proof grooves 2 are provided on both the outer and inner walls of the case body 1 , and the explosion-proof groove 2 on the outer wall faces the explosion-proof groove 2 on the inner wall. Since the explosion-proof grooves 2 on the outer side wall and the outer side wall are directly opposite, the outer side wall and the inner side wall of the shell body 1 can be extruded at the same time to form the explosion-proof groove 2. There is no need to process the explosion-proof groove 2 step by step, which is beneficial to reducing the number of batteries.
  • the outer and inner walls of the shell body 1 are trimmed to eliminate the bumps formed by welding the outer and inner walls of the shell body 1 and maintain the shell body. 1 is in a flat state to improve the quality of the battery case.
  • the explosion-proof groove 2 can also be provided only on the outer side wall of the case body 1, or the explosion-proof groove 2 can be provided only on the inner side wall of the case body 1, which is beneficial to increasing the structural style of the battery case. Expand the application range of battery cases.
  • the side wall thickness d of the shell body 1 is greater than the depth h of the explosion-proof groove 2, and 0.15 ⁇ d ⁇ 0.7mm, 0.05 ⁇ h ⁇ 0.2mm, the side wall thickness d of the shell body 1 is limited In the case of , control the depth h of the explosion-proof groove 2 to 0.05-0.2mm, which not only ensures that the explosion-proof groove 2 has the pressure relief capability, but also has sufficient pressure resistance.
  • the plate is rectangular, with the first end 11 and the second end 12 being two opposite ends, and the bent and welded rear shell body 1 is a rectangular parallelepiped structure with both ends open.
  • the explosion-proof groove 2 includes a groove bottom 22 and two groove side walls 21. The two groove side walls 21 are arranged oppositely. The groove bottom 22 is located between the two groove side walls 21. The gap between the groove bottom 22 and the groove side walls 21 is The size of angle ⁇ is 100°-160°.
  • the thickness of the shell body 1 at the position corresponding to the groove side wall 21 gradually decreases from the direction of the notch of the explosion-proof groove 2 toward the direction of the groove bottom 22 Small to prevent the thickness of the shell body 1 from rapidly reducing and causing breakage.
  • the length a of the shell body 1 is 100-2500mm
  • the height b of the shell body 1 is 50-200mm
  • the thickness c of the shell body 1 is 10-50mm.
  • a shell of this size The body 1 is suitable for most types of batteries. In actual design, the size of the shell body 1 can be flexibly changed according to needs.
  • the plate can be an aluminum plate, a plastic plate or a steel plate, etc.
  • the plate can be an aluminum alloy plate.
  • the density of aluminum alloy is low, but its strength is relatively high, close to or exceeding high-quality steel. It has good plasticity and is a commonly used raw material for making battery casings.
  • a manufacturing process for the above-mentioned battery case including the following steps:
  • Step S100 Provide a plate with a first end 11 and a second end 12, bend the plate so that the first end 11 and the second end 12 face each other, and weld the joint between the first end 11 and the second end 12. ;
  • Step S200 Extrude and form an explosion-proof groove 2 at the position where the first end 11 and the second end 12 are welded.
  • the explosion-proof groove 2 is formed by extrusion at the welding point of the first end 11 and the second end 12 of the plate.
  • the first end 11 and the second end 12 of the plate are extruded.
  • the welding point of the second end 12 is extruded and trimmed, so that the shell body 1 has the pressure relief capability and at the same time eliminates the bumps on the shell body 1 due to welding, that is, the explosion-proof groove 2 is extruded and the welding on the shell body 1 is trimmed.
  • the positions are performed simultaneously, which saves the processing steps of the battery case and simplifies the structure of the battery case, which is beneficial to improving the processing efficiency of the battery case and saving production costs.
  • the manufacturing process of such a battery case also includes step S300 of annealing the case body 1 .
  • the annealing temperature is 280-350°C
  • the annealing time is 60-120 minutes.
  • the hardness of the extruded shell body 1 is high and it is easy to break.
  • the annealing treatment in this step can release the stress of the shell body 1, restore the ductility and toughness of the shell body 1, avoid the shell body 1 from breaking, and facilitate extension.
  • an extrusion tool is used to extrudate the welded joint between the first end 11 and the second end 12 .
  • the extrusion tool includes a first extrusion block and a second extrusion block.
  • the first extrusion block and the second extrusion block are moved to the outside and inside of the shell body 1 respectively.
  • the first extrusion block and the second extrusion block are The extrusion blocks are respectively in contact with the welding points of the first end 11 and the second end 12, clamping the first extrusion block and the second extrusion block to each other, and simultaneously extruding the outer and inner walls of the shell body 1 to form Explosion-proof groove 2.
  • a battery which includes a battery case having any of the above structures.
  • the battery is easy to produce and has low cost.

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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)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本申请提供电池壳体及电池。电池壳体包括壳本体，壳本体由片状的板材弯折焊接成型，板材具有第一端和第二端，壳本体折弯后，第一端与第二端焊接，第一端和第二端焊接的位置挤压形成防爆凹槽。

Description

电池壳体及电池
本申请要求在2022年06月21日提交中国专利局、申请号为202221564467.5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
本申请涉及电池技术领域，例如涉及电池壳体及包含此种电池壳体的电池。
背景技术
众所周知，锂离子电池在使用过程中有一定概率发生内部短路或外部短路，造成电池壳内部温度升高并产生大量气体，容易引起电池膨胀爆炸，对安全使用存在重大威胁，因此需要在电池上设置泄压结构，在电池膨胀时通过泄压结构将电池壳内部的气体排出，从而防止电池爆炸。电池包括电池壳、电芯和盖板，电池壳至少一端开口，电芯容纳在电池壳内部，通过盖板封堵电池壳的开口端。相关技术中，一般是将泄压结构设置在顶盖，示例性的，顶盖上贯穿开设防爆阀孔，另外设计防爆片封堵防爆阀孔，防爆阀孔和防爆片组成泄压结构，然而相关技术中泄压结构的此种设置方式存在以下不足：需要在顶盖上冲孔以及额外设计防爆片，且防爆片为特殊材料，不仅工艺繁多而且成本高。
发明内容
本申请实施例提供了一种电池壳体，其结构简单，且成本低。
本申请实施例提供了一种电池，其易于生产，且成本低。
第一方面，本申请实施例提供了一种电池壳体，包括壳本体，所述壳本体由片状的板材弯折焊接成型，所述板材具有第一端和第二端，所述壳本体折弯后，所述第一端与所述第二端焊接，所述第一端和所述第二端焊接的位置挤压形成防爆凹槽。
在一实施例中，所述第一端与所述第二端的焊接位置形成焊缝，所述防爆凹槽的长度沿着所述焊缝的长度方向延伸。
在一实施例中，所述防爆凹槽的长度等于所述焊缝的长度。
在一实施例中，所述防爆凹槽的宽度为0.3-2mm。
在一实施例中，所述防爆凹槽延伸至所述第一端和/或所述第二端。
在一实施例中，所述壳本体的外侧壁和内侧壁均设置有所述防爆凹槽，且 所述外侧壁上的所述防爆凹槽与所述内侧壁上的所述防爆凹槽正对。
在一实施例中，所述壳本体的侧壁厚度d大于所述防爆凹槽的深度h，且0.15≤d≤0.7mm，0.05≤h≤0.2mm。
在一实施例中，所述防爆凹槽包括槽底和两个槽侧壁，所述两个槽侧壁相对设置，所述槽底位于所述两个槽侧壁之间，所述槽底与所述槽侧壁之间的夹角大小为100°-160°。
在一实施例中，所述壳本体的长度为100-2500mm。
第二方面，本申请实施例提供了一种电池，包括上述的电池壳体。
本申请的有益效果为：在板材对接的位置焊接完成后，在焊接位置会存在凸点，本申请中在壳本体对接的两端挤压形成防爆凹槽，通过挤压防爆凹槽，对壳本体的焊接位置挤压修整，以加强壳本体焊接位置的结构强度以及消除焊接过程形成的凸点，提高壳本体的美观度；此外，直接在壳本体的焊接位置挤压防爆凹槽，以减小壳本体在该位置的厚度，电池短路在壳本体内部产生大量气体时，高压气体会冲破防爆凹槽从而进行泄压，不需要再额外在电池壳体上设置防爆孔和防爆片，简化了电池壳体的结构，以及有利于降低成本。
附图说明
图1为本申请实施例提供的一种电池壳体的立体结构示意图；
图2为本申请实施例提供的一种电池壳体第一视角的侧视图；
图3为本申请实施例提供的一种电池壳体的俯视图；
图4为图3中I处的放大图；
图5为本申请实施例提供的一种电池壳体的第一端与第二端未焊接时第二视角的侧视图；
图6为图5中II处的放大图；
图7为本申请实施例提供的一种电池壳体的第一端与第二端焊接后的第二视角的侧视图；
图8为图7中III处的放大图。
图中：
1、壳本体；11、第一端；12、第二端；2、防爆凹槽；21、槽侧壁；22、槽底；3、间隙。
具体实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；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，可以根据情况理解上述术语在本申请中的含义。
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”可以包括第一特征和第二特征直接接触，也可以包括第一特征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下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
于本文的描述中，术语“上”、“下”、“左”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，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”仅仅用于在描述上加以区分，并没有特殊的含义。
在本说明书的描述中，参考术语“一实施例”、“示例”等的描述意指结合该实施例或示例描述的特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。
此外，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，多个实施例中的技术方案也可以适当组合，形成本领域技术人员可以理解的其他实施方式。
如图1至8所示，本申请提供一种电池壳体，包括壳本体1，壳本体1由片状的板材弯折焊接成型，板材具有第一端11和第二端12，壳本体1折弯后第一端11与第二端12焊接，第一端11和第二端12焊接的位置挤压形成防爆凹槽2。
在板材对接的位置焊接完成后，在焊接位置会存在凸点，本申请中在壳本体1对接的两端挤压形成防爆凹槽2，通过挤压防爆凹槽2，对壳本体1的焊接位置挤压修整，以加强壳本体1焊接位置的结构强度以及消除焊接过程形成的凸点，提高壳本体1的美观度；此外，通过在壳本体1的焊接位置挤压防爆凹槽2，削弱 壳本体1在防爆凹槽2位置的结构强度，当电池短路在壳本体1内部产生大量气体时，高压气体可以冲破防爆凹槽2从而进行泄压，不需要额外在电池壳体上设置防爆孔和防爆片，简化了电池壳体的结构，以及有利于降低成本。
本实施例中，片状的板材呈矩形，其中板材具有相对设置的第一端11和第二端12，将板材弯折，通过焊接连接第一端11和第二端12。在其他的实施例中，板材的结构并不限于是矩形结构，还可以呈三角形，当板材呈三角形时，第一端11与第二端12为相邻的两端，或者板材呈多边形，当板材呈多边形时，第一端11与第二端12可以相邻也可以不相邻。
示例性的，第一端11与第二端12的焊接位置形成焊缝，防爆凹槽2的长度沿着焊缝的长度方向延伸，具有一定长度的防爆凹槽2，有利于电池壳体的泄压，保证电池的安全性。
示例性的，防爆凹槽2的长度等于焊缝的长度，这样在第一端11和第二端12焊接的位置挤压形成防爆凹槽2的时候，也对焊缝多个位置进行了挤压修整，防止部分焊缝未修整出现裂缝而影响电池壳体的密封性。
本实施例中，参照图8，防爆凹槽2的宽度w为0.3-2mm，宽度太大的防爆凹槽2，在电池壳体内部短路时，壳本体1内部的高压气体的压力太分散，高压气体不易冲破防爆凹槽2而导致防爆凹槽2泄压失效，宽度太小的防爆凹槽2不便于挤压，并且也不利于修整焊缝，无法保证焊缝的结构强度。
挤压防爆凹槽2的过程中，为了使板材的第一端11和第二端12均被挤压以保证第一端11和第二端12焊接位置的结构强度，防爆凹槽2分别延伸至第一端11和第二端12，第一端11和第二端12均成为防爆凹槽2的部分槽壁或槽底22。
在其他的实施例中，也可以将防爆凹槽2仅延伸至第一端11或将防爆凹槽2仅延伸至第二端12。
本实施例中，参照图5和图6，在焊接之前第一端11与第二端12之间的间隙3为0.2-1mm。
一实施例中的电池壳体，壳本体1的外侧壁和内侧壁均设置有防爆凹槽2，且外侧壁上的防爆凹槽2与内侧壁上的防爆凹槽2正对。由于外侧壁和外侧壁上的防爆凹槽2是正对的，壳本体1的外侧壁和内侧壁可以同时挤压形成防爆凹槽2，不需要分步加工形成防爆凹槽2，有利于减少电池壳体的加工步骤，此外挤压形成防爆凹槽2的过程中均对壳本体1的外侧壁和内侧壁进行修整，消除壳本体1的外侧壁和内侧壁焊接形成的凸点，保持壳本体1的处于平整状态，提高电池壳体的质量。在其他的实施例中，也可以仅在壳本体1的外侧壁设置防爆凹槽2，或，仅在壳本体1的内侧壁上设置防爆凹槽2，有利于增加电池壳体的结构样式，扩 大电池壳体应用范围。
示例性的，参照图8，壳本体1的侧壁厚度d大于防爆凹槽2的深度h，且0.15≤d≤0.7mm，0.05≤h≤0.2mm，在壳本体1的侧壁厚度d有限的情况下，控制防爆凹槽2的深度h为0.05-0.2mm，在保证防爆凹槽2具有泄压能力的基础，也具有足够的耐压能力。
本实施例中，参照图1、图7和图8，板材呈矩形，第一端11与第二端12为相对的两端，折弯焊接后壳本体1整体为两端开口的长方体结构。防爆凹槽2包括槽底22和两个槽侧壁21，两个槽侧壁21相对设置，槽底22位于两个槽侧壁21之间，槽底22与槽侧壁21之间的夹角α大小为100°-160°。由于槽底与槽侧壁21之间的夹角α大小为100°-160°，壳本体1在对应槽侧壁21的位置厚度由防爆凹槽2的槽口方向朝向槽底22方向逐渐减小，避免壳本体1的厚度急剧减小而引起断裂。
示例性的，参照图1至图3，壳本体1的长度方a为100-2500mm，壳本体1的高度b为50-200mm，壳本体1的厚度c为10-50mm，此种尺寸的壳本体1适用于大多数型号的电池，在实际设计时，可根据需要灵活改变壳本体1的尺寸大小。
板材可以为铝板、塑料板或钢板等，板材可采用铝合金板，铝合金密度低，但强度比较高，接近或超过优质钢，塑性好，是电池壳体常用的制作原料。
在一实施例中，提供一种上述电池壳体的制作工艺，包括以下步骤：
步骤S100、提供板材，板材具有第一端11和第二端12，将板材弯折，使第一端11与第二端12正对，在第一端11和第二端12的对接处焊接；
步骤S200、在第一端11和第二端12焊接的位置挤压形成防爆凹槽2。
此种电池壳体的制作工艺，由于在板材的第一端11和第二端12的焊接处挤压形成防爆凹槽2，在挤压形成防爆凹槽2的过程同时对第一端11和第二端12的焊接处进行挤压修整，使壳本体1具有泄压能力的同时，消除壳本体1上由于焊接而出现凸点，即挤压防爆凹槽2和修整壳本体1上的焊接位置是同步进行，节约了电池壳体的加工工序，且简化电池壳体的结构，有利于提高电池壳体的加工效率，节约生产成本。
示例性的，此种电池壳体的制作工艺还包括步骤S300、对壳本体1进行退火处理。示例性的，退火处理的温度为280-350℃，退火处理的时间为60-120min。挤压后的壳本体1硬度大容易断裂，挤压壳本体1后通过本步骤的退火处理使壳本体1释放应力，恢复壳本体1的延展性和韧性，避免壳本体1断裂，有利于延长壳本体1的使用寿命。
加工时，利用挤压工具对第一端11与第二端12的焊接处进行挤压。其中， 挤压工具包括第一挤压块和第二挤压块，将第一挤压块和第二挤压块分别移动至壳本体1的外部和内部，将第一挤压块和第二挤压块分别抵接在第一端11与第二端12的焊接处，将第一挤压块和第二挤压块相互夹紧，在壳本体1的外侧壁和内侧壁同时挤压形成防爆凹槽2。
在一实施例中，提供一种电池，包括上述任一种结构的电池壳体，该电池中易于生产，且成本低。

Claims (10)

  1. 一种电池壳体，包括壳本体，所述壳本体由片状的板材弯折焊接成型，所述板材具有第一端和第二端，所述壳本体折弯后，所述第一端与所述第二端焊接，所述第一端和所述第二端焊接的位置挤压形成防爆凹槽。
  2. 根据权利要求1所述的电池壳体，其中，所述第一端与所述第二端的焊接位置形成焊缝，所述防爆凹槽的长度沿着所述焊缝的长度方向延伸。
  3. 根据权利要求2所述的电池壳体，其中，所述防爆凹槽的长度等于所述焊缝的长度。
  4. 根据权利要求1至3任一项所述的电池壳体，其中，所述防爆凹槽的宽度为0.3-2mm。
  5. 根据权利要求1至3任一项所述的电池壳体，其中，所述防爆凹槽延伸至所述第一端和所述第二端中的至少之一。
  6. 根据权利要求1至3任一项所述的电池壳体，其中，所述壳本体的外侧壁和内侧壁均设置有所述防爆凹槽，且所述外侧壁上的所述防爆凹槽与所述内侧壁上的所述防爆凹槽正对。
  7. 根据权利要求1至3任一项所述的电池壳体，其中，所述壳本体的侧壁厚度d大于所述防爆凹槽的深度h，且0.15≤d≤0.7mm，0.05≤h≤0.2mm。
  8. 根据权利要求1至3任一项所述的电池壳体，其中，所述防爆凹槽包括槽底和两个槽侧壁，所述两个槽侧壁相对设置，所述槽底位于所述两个槽侧壁之间，所述槽底与所述槽侧壁之间的夹角大小为100°-160°。
  9. 根据权利要求1至3任一项所述的电池壳体，其中，所述壳本体的长度为100-2500mm。
  10. 一种电池，包括权利要求1至9任一项所述的电池壳体。
PCT/CN2022/143963 2022-06-21 2022-12-30 电池壳体及电池 WO2023246075A1 (zh)

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