WO2023221383A1 - 壳体组件和电池 - Google Patents

壳体组件和电池 Download PDF

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Publication number
WO2023221383A1
WO2023221383A1 PCT/CN2022/125256 CN2022125256W WO2023221383A1 WO 2023221383 A1 WO2023221383 A1 WO 2023221383A1 CN 2022125256 W CN2022125256 W CN 2022125256W WO 2023221383 A1 WO2023221383 A1 WO 2023221383A1
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WO
WIPO (PCT)
Prior art keywords
riveting
column
shell
pole
mounting hole
Prior art date
Application number
PCT/CN2022/125256
Other languages
English (en)
French (fr)
Inventor
岳亮亮
黄利明
肖天丽
陈文�
李尚益
刘静
徐悦斌
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 EP22818599.7A priority Critical patent/EP4303998A1/en
Priority to US18/088,829 priority patent/US20230378578A1/en
Publication of WO2023221383A1 publication Critical patent/WO2023221383A1/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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells 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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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, for example, to a case assembly and a battery including the case assembly.
  • Electrodes There are two main ways to lead out electrodes on the market. One is to lead out the positive and negative electrodes on the same side, and the other is to lead out the positive and negative electrodes on different sides. These two electrode lead-out methods usually open terminal lead-out holes on the side of the casing. Lead to the positive or negative terminal. In a specific battery structure, there must be strong insulation and sealing between the positive terminal and the steel shell to ensure the reliability of the internal electrical connection of the battery. Therefore, there is an urgent need for a battery with a simple structure and a steel shell structure that meets the requirements of insulation reliability, sealing reliability, and internal electrical connections.
  • This application provides a shell component with a simple structure, low manufacturing difficulty, and good sealing performance.
  • This application provides a battery with good quality and high safety performance.
  • embodiments of the present application provide a housing assembly, including a housing body, a pole and an insulating member.
  • the housing body is provided with a mounting hole
  • the pole penetrates the mounting hole
  • the insulating member Disposed between the shell body and the pole
  • the pole includes a pole body that penetrates the mounting hole
  • the pole body includes a first end and a second end, and the second end Located inside the shell body, the first end is provided with a limiting portion, and the second end is provided with a riveting portion.
  • the limiting portion and the riveting portion are configured to jointly clamp the insulating member and the In the shell body, the end surface of the second end is provided with a groove, and the groove is adjacent to the riveting part.
  • the riveting part includes a plurality of riveting pieces, the plurality of riveting pieces are annularly arranged around the circumference of the column body, and two adjacent riveting pieces are spaced apart.
  • the distance between two adjacent riveting pieces is 1mm-20mm.
  • the groove is provided corresponding to each riveting piece, the groove is arc-shaped, and the arc length of the groove is greater than the width of the riveting piece.
  • a ring of grooves is provided annularly around the center of the column body.
  • the distance between the end surface of the second end and the end surface of the first end is L1
  • the distance between the riveting part and the end surface of the first end is L2, L1>L2.
  • the outer edge of the riveted part is arc-shaped, the diameter of the outer edge of the riveted part is D1, the diameter of the column body is D2, and the ratio of D1 to D2 is 1.5-10.
  • the limiting portion is provided with a protrusion protruding from a side surface of the housing body, and the protrusion is pressed against the insulating member.
  • the protrusion is annular and is arranged around the column body.
  • the insulating component includes a first insulating component and a second insulating component
  • the first insulating component includes a first hollow column and a first insulating sheet
  • the first hollow column is inserted into the mounting hole.
  • the first insulating piece is disposed between the limiting part and the shell body
  • the second insulating component includes a second hollow column and a second insulating piece.
  • the second hollow column is inserted into the mounting hole and connected to the first hollow column to separate the column body and the hole wall of the mounting hole, and the second insulating sheet is provided on the riveting part and between the shell body.
  • the side surfaces of the first hollow column and the side surfaces of the second hollow column at least partially overlap.
  • it includes a pressure ring, the column body penetrates the pressure ring, and the pressure ring is disposed between the insulating member and the riveting part.
  • embodiments of the present application provide a battery, including a battery core and the above-mentioned case assembly.
  • the battery core is disposed in the shell body, and the two electrodes of the battery core are respectively connected to the shell body. electrically connected to the pole.
  • the beneficial effects of this application are: by arranging an integrated pole and fixing the pole and the shell body by riveting, it can not only simplify the structure of the pole, but also reduce the gaps caused by the assembly of the shell components, and improve the performance of the shell.
  • the sealing of the component; the setting of the insulator can not only achieve the insulation between the pole and the shell body, but also seal the gap between the pole and the shell body to achieve the sealing of the shell assembly; through the second part of the pole
  • the local thickness between the riveted part and the column body can be thinned, so that the riveted part can be bent according to the preset position, and the width of the riveted part can be elastically adjusted through the radial position of the groove. This can facilitate the control of the deformation of the pole during the riveting process and avoid the problem of cracking caused by excessive width of the riveted part, thus reducing the difficulty of riveting.
  • Figure 1 is an exploded schematic diagram of a housing assembly provided by an embodiment of the present application
  • Figure 2 is a partial cross-sectional schematic diagram of a housing assembly provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of a pole provided by an embodiment of the present application.
  • Figure 4 is a schematic bottom view of a pole provided by an embodiment of the present application.
  • Figure 5 is a schematic diagram of a pole before riveting provided by the embodiment of the present application.
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral body; it can be 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 components or an interaction between two components.
  • connection can be a fixed connection, a detachable connection, or an integral body; it can be 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 components or an interaction between two components.
  • this application provides a housing assembly, including a housing body 1, a pole 2 and an insulator 3.
  • the housing body 1 is provided with a mounting hole 101, and the pole 2 penetrates the mounting hole 101.
  • the insulator 3 is arranged between the shell body 1 and the pole 2.
  • the pole 2 includes a pole body 201, which penetrates the mounting hole 101.
  • the pole body 201 includes a first end and a second end, and the first end is located on the shell body 1.
  • the second end is located inside the shell body 1
  • the first end of the column body 201 is provided with a limiting portion 202
  • the second end of the column body 201 is provided with a riveting portion 203
  • the limiting portion 202 and the riveting portion 203 are clamped together
  • the end surfaces of the second end of the insulating member 3 and the shell body 1 are provided with a groove 204
  • the groove 204 is adjacent to the riveting portion 203 .
  • the setting of the insulator 3 can not only realize the insulation between the pole 2 and the shell body 1, but also seal the gap between the pole 2 and the shell body 1 to achieve the sealing of the shell assembly; by installing the pole 2
  • a groove 204 is provided at the second end, which can thin the local thickness between the riveting part 203 and the column body 201, so that the riveting part 203 can be bent according to the preset position, and the width of the riveting part 203 can pass through the groove.
  • the radial position of 204 is elastically adjusted, which can facilitate the control of the deformation of the pole 2 during the riveting process, and avoid the problem of cracking caused by excessive width of the riveting portion 203, thus reducing the difficulty of riveting.
  • the riveting part 203 includes a plurality of riveting pieces 205.
  • the plurality of riveting pieces 205 are annularly arranged around the circumference of the column body 201. Two adjacent riveting pieces 205 are spaced apart.
  • the riveting piece 205 is fan-shaped.
  • the length of a single riveting piece 205 can be appropriately increased so that the pole post 2 can be firmly fixed on the shell body 1 , improve the anti-deformation ability of the pole 2, prevent the pole 2 from accidentally detaching from the shell body 1, and improve the safety performance of the shell assembly.
  • four riveting pieces 205 are provided, the four riveting pieces 205 are of the same size, and the four riveting pieces 205 are evenly arranged around the circumference of the column body 201, so that the pole 2 can be balanced in force. Not prone to deformation.
  • the distance between two adjacent riveting pieces 205 is 1mm-20mm. By limiting the spacing between two adjacent riveting pieces 205, the spacing between the riveting pieces 205 can be avoided from being too large or too small, thereby ensuring the fixing effect between the pole post 2 and the shell body 1.
  • a groove 204 is provided corresponding to each riveting piece 205 .
  • the groove 204 is arc-shaped, and the arc length of the groove 204 is greater than the width of the riveting piece 205 .
  • the groove 204 is in the shape of a circle, and a circle of grooves 204 is provided annularly around the center of the column body 201. At this time, all the grooves 204 are adjacent to form a circle structure, so that The difficulty of forming the groove 204 is reduced, thereby reducing the difficulty of processing the pole 2 and reducing the processing cost of the housing assembly.
  • the groove 204 is circular. In other embodiments, the groove 204 may be a rectangular ring.
  • the distance between the end surface of the second end and the end surface of the first end is L1
  • the distance between the riveting part 203 and the end surface of the first end is L2, L1>L2, at this time, the end surface of the second end protrudes At the riveting part 203.
  • the end surface of the second end of the column body 201 is configured to be connected to the electrode sheet of the battery core.
  • the outer edge of the riveted portion 203 is arc-shaped, the diameter of the outer edge of the riveted portion 203 is D1, the diameter of the column body 201 is D2, and the ratio of D1 to D2 is 1.5-10.
  • the width of the riveting part 203 can be adjusted by adjusting the position of the groove 204, that is, adjusting the ratio of D1 and D2 to avoid cracking of the riveting part 203 if the width is too large.
  • a protrusion 206 protrudes from a side of the limiting portion 202 close to the housing body 1 , and the protrusion 206 abuts the insulating member 3 .
  • the protrusion 206 By providing the protrusion 206, the local distance between the limiting portion 202 and the case body 1 can be reduced.
  • the insulating member 3 corresponding to the position of the protrusion 206 has a larger compression amount, which can improve the distance between the pole 2 and the case body 1. The sealing effect between them.
  • protrusions 206 there are multiple protrusions 206 , and the plurality of protrusions 206 are arranged around the circumference of the column body 201 ; in another embodiment, the protrusions 206 are annular, and the protrusions 206 are arranged around the column body 201 .
  • the shape of the protrusion 206 affects the processing difficulty of the pole post 2, thereby affecting the manufacturing cost of the housing assembly.
  • a variety of protrusions 206 with different shapes are provided, and the type of the protrusion 206 can be selected according to actual needs, so that the housing assembly can Meet different sealing standards and achieve a win-win situation of quality and cost.
  • the insulating member 3 includes a first insulating member 301 and a second insulating member 302.
  • the first insulating member 301 includes a first hollow column 3011 and a first insulating sheet 3012.
  • the first hollow column 3011 is inserted into the mounting hole 101.
  • the first insulating sheet 3012 is disposed between the limiting part 202 and the shell body 1 with the hole wall of the spacer column body 201 and the mounting hole 101 inside.
  • the second insulating member 302 includes a second hollow column 3021 and a second insulating sheet 3022.
  • the second hollow column 3021 is inserted into the mounting hole 101 and connected to the first hollow column 3011 to separate the column body 201 from the hole wall of the mounting hole 101 .
  • the second insulating sheet 3022 is disposed between the riveting part 203 and the shell body 1 .
  • the side surfaces of the first hollow column 3011 and the side surfaces of the second hollow column 3021 at least partially overlap.
  • the overlapping first hollow column 3011 and the second hollow column 3021 it is possible to avoid the separation of the first insulator part 301 and the second insulator part 302 under the action of radial force during the riveting process, thus preventing the pole 2 from being separated from the shell.
  • the body 1 is short-circuited; the overlapping first hollow column 3011 and the second hollow column 3021 can avoid air insulation between the pole 2 and the steel shell, thereby avoiding the phenomenon of creepage.
  • the pole 2 may be made of aluminum or aluminum alloy, and the first insulator part 301 and the second insulator part 302 may be made of fusible polytetrafluoroethylene (Perfluoroalkoxy, PFA), polyterephthalene. It is an insulating material with a certain elasticity such as polyethylene glycol terephthalate (PET), polypropylene (PP), fluororubber or rubber.
  • the shell body 1 is made of steel.
  • the housing assembly also includes a pressing ring 4.
  • the pressing ring 4 is arranged inside the housing body 1.
  • the pole body 201 of the pole 2 penetrates the pressing ring 4.
  • the pressing ring 4 is arranged on the second insulator component 302 and the riveting part 203. between.
  • the pressing ring 4 is made of insulating material.
  • the pressing ring 4 can prevent the riveting part 203 of the pole 2 from contacting the shell body 1. Therefore, the setting of the pressing ring 4 can provide double protection.
  • the pressure ring 4 can prevent the pole 2 from contacting the case body 1 and causing a battery short circuit.
  • the inner diameter of the pressure ring 4 ranges from 5mm to 20mm
  • the outer diameter ranges from 7mm to 30mm
  • the thickness ranges from 0.4mm to 1.2mm.
  • This embodiment also provides a battery, including a battery core and the above-mentioned case assembly.
  • the battery core is arranged in the case body 1, and the two electrodes of the battery core are electrically connected to the case body 1 and the pole 2 respectively. Since the casing component has good sealing and insulation properties, the battery made of this casing component has higher safety performance, because the casing component can better control the movement of the pole 2 during the riveting process. deformation and improve the riveting quality, therefore, the battery made with this case component has better quality.
  • the case body 1 is connected to the negative electrode of the battery core, and the pole post 2 is connected to the positive pole of the battery core. That is, the case body 1 is the negative electrode of the battery, and the pole post 2 is the positive electrode of the battery.

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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)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供一种电池壳体组件和电池。壳体组件包括壳本体、极柱和绝缘件，壳本体上设置有安装孔，极柱贯穿安装孔，柱本体包括第一端和第二端，第二端位于壳本体的内部，第一端设置有限位部，第二端设置有铆接部，限位部和铆接部共同夹紧绝缘件和壳本体，第二端的端面设置有凹槽，凹槽邻近于铆接部。通过设置一体式的极柱，采用铆接的方式固定极柱和壳本体，不仅可以简化极柱的结构，还可以减少壳体组件因组装而产生的间隙，提高壳体组件的密封性；在极柱铆接端设置凹槽，可以减薄铆接部和柱本体之间的局部厚度，使得铆接部可以按照预设的位置进行折弯，这样可以便于规避因铆接翻边长度过大，导致开裂问题的出现，从而降低铆接难度。

Description

壳体组件和电池
本申请要求在2022年05月19日提交中国专利局、申请号为202221264840.5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，例如涉及一种壳体组件，以及包含此壳体组件的电池。
背景技术
市面上电极引出的方式主要有两种，一是正极及负极在同一侧引出，二是正极及负极异侧引出，这两种电极引出方式通常是在壳体的侧面上开设端子引出孔，以引出正极端子或负极端子。在特定的电池结构中，需要使正极端子和钢壳之间必须要具有较强的绝缘性、密封性来保证电池内部电连接的可靠性。因此，亟需一种结构简单且满足绝缘可靠性、密封可靠性以及内部电连接的钢壳结构的电池。
发明内容
本申请提供了一种壳体组件，其结构简单，制造难度低，且密封性能好。
本申请提供了一种电池，其质量好，安全性能高。
第一方面，本申请实施例提供了一种壳体组件，包括壳本体、极柱和绝缘件，所述壳本体上设置有安装孔，所述极柱贯穿所述安装孔，所述绝缘件设置在所述壳本体和所述极柱之间，所述极柱包括柱本体，所述柱本体贯穿所述安装孔，所述柱本体包括第一端和第二端，所述第二端位于所述壳本体的内部，所述第一端设置有限位部，所述第二端设置有铆接部，所述限位部和所述铆接部设置为共同夹紧所述绝缘件和所述壳本体，所述第二端的端面设置有凹槽，所述凹槽邻近于所述铆接部。
在一实施例中，所述铆接部包括多个铆接片，所述多个铆接片环形排布在所述柱本体的周部，相邻两个铆接片之间间隔设置。
在一实施例中，相邻两个所述铆接片之间的距离为1mm-20mm。
在一实施例中，对应每个铆接片设置有所述凹槽，所述凹槽呈弧形，所述凹槽的弧长大于所述铆接片的宽度。
在一实施例中，绕所述柱本体的中心环形设置有一圈凹槽。
在一实施例中，所述第二端的端面和所述第一端的端面之间的距离为L1，所述铆接部和所述第一端的端面之间的距离为L2，L1>L2。
在一实施例中，所述铆接部的外边缘呈弧形，所述铆接部的外边缘的直径为D1，所述柱本体的直径为D2，D1和D2的比值为1.5-10。
在一实施例中，所述限位部靠近所述壳本体的一侧面凸出设置有凸起，所述凸起抵紧所述绝缘件。
在一实施例中，所述凸起有多个，多个凸起环绕所述柱本体的周部设置；或，
所述凸起呈环状，所述凸起环绕所述柱本体设置。
在一实施例中，所述绝缘件包括第一绝缘子件和第二绝缘子件，所述第一绝缘子件包括第一空心柱和第一绝缘片，所述第一空心柱插入所述安装孔内以间隔所述柱本体和所述安装孔的孔壁，所述第一绝缘片设置在限位部和所述壳本体之间，所述第二绝缘子件包括第二空心柱和第二绝缘片，所述第二空心柱插入所述安装孔内并和所述第一空心柱连接，以间隔所述柱本体和所述安装孔的孔壁，所述第二绝缘片设置在所述铆接部和所述壳本体之间。
在一实施例中，所述第一空心柱的侧面和所述第二空心柱的侧面至少部分重叠。
在一实施例中，包括压环，所述柱本体贯穿所述压环，所述压环设置在所述绝缘件和所述铆接部之间。
第二方面，本申请实施例提供了一种电池，包括电芯和上述的壳体组件，所述电芯设置在所述壳本体内，所述电芯的两个电极分别与所述壳本体和所述极柱电连接。
本申请的有益效果为：通过设置一体式的极柱，采用铆接的方式固定极柱和壳本体，不仅可以简化极柱的结构，还可以减少壳体组件因组装而产生的间隙，提高壳体组件的密封性；绝缘件的设置不仅可以实现极柱和壳本体之间的绝缘，还可以封堵极柱和壳本体之间的间隙，实现壳体组件的密封；通过在极柱的第二端设置凹槽，可以减薄铆接部和柱本体之间的局部厚度，使得铆接部可以按照预设的位置进行折弯，并且，铆接部的宽度可以通过凹槽的径向位置进行弹性调整，这样可以便于控制铆接过程中极柱的变形，以及规避铆接部宽度过大，导致开裂的问题出现，从而降低铆接难度。
附图说明
图1为本申请实施例提供的一种壳体组件分解示意图；
图2为本申请实施例提供的一种壳体组件局部剖视示意图；
图3为本申请实施例提供的一种极柱的示意图；
图4为本申请实施例提供的一种极柱的仰视示意图；
图5为本申请实施例提供的一种极柱铆接前的示意图。
图中：
1、壳本体；101、安装孔；2、极柱；201、柱本体；202、限位部；203、铆接部；204、凹槽；205、铆接片；206、凸起；3、绝缘件；301、第一绝缘子件；3011、第一空心柱；3012、第一绝缘片；302、第二绝缘子件；3021、第二空心柱；3022、第二绝缘片；4、压环。
具体实施方式
在本申请的描述中，除非另有规定和限定，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。
如图1和图2所示，本申请提供的一种壳体组件，包括壳本体1、极柱2和绝缘件3，壳本体1上设置有安装孔101，极柱2贯穿安装孔101，绝缘件3设置在壳本体1和极柱2之间，极柱2包括柱本体201，柱本体201贯穿安装孔101，柱本体201包括第一端和第二端，第一端位于壳本体1的外部，第二端位于壳本体1的内部，柱本体201的第一端设置有限位部202，柱本体201的第二端设置有铆接部203，限位部202和铆接部203共同夹紧绝缘件3和壳本体1，第二端的端面设置有凹槽204，凹槽204邻近于铆接部203。通过设置一体式的极柱2，采用铆接的方式固定极柱2和壳本体1，不仅可以简化极柱2的结构，还可以减少壳体组件因组装而产生的间隙，提高壳体组件的密封性；绝缘件3的设置不仅可以实现极柱2和壳本体1之间的绝缘，还可以封堵极柱2和壳本体1之间的间隙，实现壳体组件的密封；通过在极柱2的第二端设置凹槽204，可以减薄铆接部203和柱本体201之间的局部厚度，使得铆接部203可以按照预设的位置进行折弯，并且，铆接部203的宽度可以通过凹槽204的径向位置进行弹性调整，这样可以便于控制铆接过程中极柱2的变形，以及规避铆接部203宽度过大，导致开裂的问题出现，从而降低铆接难度。
参照图3和图4，铆接部203包括多个铆接片205，多个铆接片205环形排 布在柱本体201的周部，相邻两个铆接片205之间间隔设置，在本实施例中，铆接片205铆接完成之后，铆接片205呈扇形。通过设置多个铆接片205，可以降低在铆接过程中铆接片205出现开裂的可能性，此时，可以适当增大单个铆接片205的长度，使得极柱2可以牢牢固定在壳本体1上，提高极柱2的抗变形能力，避免极柱2因意外脱离壳本体1，提高壳体组件的安全性能。在本实施例中，铆接片205设置有四个，四个铆接片205大小一致，且四个铆接片205均匀排布在柱本体201的周部，这样可以使得极柱2能够受力平衡，不容易出现变形。
在本实施例中，相邻两个铆接片205之间的距离为1mm-20mm。通过对相邻两个铆接片205之间的间距进行限定可以避免铆接片205之间的间距过大或者过小，从而保证极柱2和壳本体1之间的固定效果。
参照图5，对应每个铆接片205设置有凹槽204，凹槽204呈弧形，凹槽204的弧长大于铆接片205的宽度。通过设置凹槽204的长度大于铆接片205的宽度，铆接过程中，可以尽可能地平衡铆接片205多处的受力，尽可能降低铆接片205和柱本体201之间出现开裂的问题。
参照图4，在本实施例中，凹槽204呈圈状，绕柱本体201的中心环形设置有一圈凹槽204，此时，所有的凹槽204相邻形成一个圈状的结构，这样可以降低凹槽204的成型难度，从而降低极柱2的加工难度，降低壳体组件的加工成本。在本实施例中，凹槽204呈圆形，在其他实施例中，凹槽204可以是呈矩形环。
参照图2，第二端的端面和第一端的端面之间的距离为L1，铆接部203和第一端的端面之间的距离为L2，L1>L2，此时，第二端的端面凸出于铆接部203。在本实施例中，柱本体201的第二端的端面设置为与电芯的电极片连接，通过设置柱本体201的第二端的端面凸出于铆接部203，可以方便柱本体201和电极片之间的连接固定，从而保证极柱2和电芯之间的电连接稳定性。
参照图4，铆接部203的外边缘呈弧形，铆接部203的外边缘的直径为D1，柱本体201的直径为D2，D1和D2的比值为1.5-10。在本实施例中，可以通过调整凹槽204的位置来调整铆接部203的宽度，即调整D1和D2的比值，避免铆接部203的宽度过大出现破裂。
参照图2，限位部202靠近壳本体1的一侧面凸出设置有凸起206，凸起206抵紧绝缘件3。通过设置凸起206，可以减小限位部202和壳本体1的局部间距，此时，与凸起206位置对应的绝缘件3压缩量较大，这样可以提高极柱2和壳本体1之间的密封效果。
一实施例中，凸起206设置有多个，多个凸起206环绕柱本体201的周部设置；另一实施例中，凸起206呈环状，凸起206环绕柱本体201设置。凸起206的形状影响极柱2的加工难度，从而影响壳体组件的制造成本，设置多种形状不同的凸起206，可以根据实际需要来选择凸起206的种类，从而使得壳体组件能够满足不同的密封标准，实现质量和成本的双赢。
参照图1和图2，绝缘件3包括第一绝缘子件301和第二绝缘子件302，第一绝缘子件301包括第一空心柱3011和第一绝缘片3012，第一空心柱3011插入安装孔101内以间隔柱本体201和安装孔101的孔壁，第一绝缘片3012设置在限位部202和壳本体1之间，第二绝缘子件302包括第二空心柱3021和第二绝缘片3022，第二空心柱3021插入安装孔101内并和第一空心柱3011连接，以间隔柱本体201和安装孔101的孔壁，第二绝缘片3022设置在铆接部203和壳本体1之间。通过设置分体式的绝缘件3，可以降低壳体组件的组装难度，从而提高壳体组件的组装效率。
一实施例中，第一空心柱3011的侧面和第二空心柱3021的侧面至少部分重叠。通过设置重叠的第一空心柱3011和第二空心柱3021，可以避免铆接过程中，在径向力的作用下第一绝缘子件301和第二绝缘子件302出现分离，从而避免极柱2和壳本体1短接；重叠的第一空心柱3011和第二空心柱3021可以避免极柱2和钢壳之间出现空气绝缘，从而避免出现爬电现象。
在本实施例中，极柱2的材质可以是铝或铝合金，第一绝缘子件301和第二绝缘子件302的材质可以是可熔性聚四氟乙烯(Perfluoroalkoxy，PFA)、聚对苯二甲酸乙二醇酯(polyethylene glycol terephthalate，PET)、聚丙烯(polypropylene，PP)、氟橡胶或者是橡胶等具有一定弹性的绝缘材料，壳本体1的材质为钢。
参照图2，壳体组件还包括压环4，压环4设置在壳本体1的内侧，极柱2的柱本体201贯穿压环4，压环4设置在第二绝缘子件302和铆接部203之间。在本实施例中，压环4采用绝缘材料制成，在铆接过程中，压环4可以防止极柱2的铆接部203与壳本体1接触，因此，压环4的设置可以进行双重防护，若是第二绝缘子件302出现移位，压环4可以避免极柱2与壳本体1接触导致电池短路。在本实施例中，压环4的内径范围为5mm-20mm，外径范围为7mm-30mm，厚度范围为0.4mm-1.2mm。
本实施例还提供了一种电池，包括电芯和上述的壳体组件，电芯设置在壳本体1内，电芯的两个电极分别与壳本体1和极柱2电连接。由于壳体组件具有较好的密封性和绝缘性，因此，采用此壳体组件制成的电池安全性能较高，由于壳体组件在铆接过程中可以较好的控制铆接过程中极柱2的变形，提高铆 接质量，因此，采用此壳体组件制成的电池具有较好的质量。
在本实施例中，壳本体1与电芯的负极相连，极柱2和电芯的正极相连，即壳本体1为电池的负极，极柱2为电池的正极。
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。

Claims (13)

  1. 一种壳体组件，包括壳本体、极柱和绝缘件，所述壳本体上设置有安装孔，所述极柱贯穿所述安装孔，所述绝缘件设置在所述壳本体和所述极柱之间，所述极柱包括柱本体，所述柱本体贯穿所述安装孔，所述柱本体包括第一端和第二端，所述第二端位于所述壳本体的内部，所述第一端设置有限位部，所述第二端设置有铆接部，所述限位部和所述铆接部设置为共同夹紧所述绝缘件和所述壳本体，所述第二端的端面设置有凹槽，所述凹槽邻近于所述铆接部。
  2. 根据权利要求1所述的壳体组件，其中，所述铆接部包括多个铆接片，所述多个铆接片环形排布在所述柱本体的周部，相邻两个铆接片之间间隔设置。
  3. 根据权利要求2所述的壳体组件，其中，相邻两个铆接片之间的距离为1mm-20mm。
  4. 根据权利要求2所述的壳体组件，其中，对应每个铆接片设置有所述凹槽，所述凹槽呈弧形，所述凹槽的弧长大于所述铆接片的宽度。
  5. 根据权利要求2所述的壳体组件，其中，绕所述柱本体的中心环形设置有一圈凹槽。
  6. 根据权利要求1所述的壳体组件，其中，所述第二端的端面和所述第一端的端面之间的距离为L1，所述铆接部和所述第一端的端面之间的距离为L2，L1>L2。
  7. 根据权利要求2所述的壳体组件，所述铆接部的外边缘呈弧形，所述铆接部的外边缘的直径为D1，所述柱本体的直径为D2，D1和D2的比值为1.5-10。
  8. 根据权利要求1所述的壳体组件，其中，所述限位部靠近所述壳本体的一侧面凸出设置有凸起，所述凸起抵紧所述绝缘件。
  9. 根据权利要求8所述的壳体组件，其中，所述凸起有多个，多个凸起环绕所述柱本体的周部设置；或，
    所述凸起呈环状，所述凸起环绕所述柱本体设置。
  10. 根据权利要求1所述的壳体组件，其中，所述绝缘件包括第一绝缘子件和第二绝缘子件，所述第一绝缘子件包括第一空心柱和第一绝缘片，所述第一空心柱插入所述安装孔内以间隔所述柱本体和所述安装孔的孔壁，所述第一绝缘片设置在所述限位部和所述壳本体之间，所述第二绝缘子件包括第二空心柱和第二绝缘片，所述第二空心柱插入所述安装孔内并和所述第一空心柱连接，以间隔所述柱本体和所述安装孔的孔壁，所述第二绝缘片设置在所述铆接部和所述壳本体之间。
  11. 根据权利要求10所述的壳体组件，其中，所述第一空心柱的侧面和所 述第二空心柱的侧面至少部分重叠。
  12. 根据权利要求1所述的壳体组件，还包括压环，所述柱本体贯穿所述压环，所述压环设置在所述绝缘件和所述铆接部之间。
  13. 一种电池，包括电芯和如权利要求1-12任一项所述的壳体组件所述电芯设置在所述壳本体内，所述电芯的两个电极分别与所述壳本体和所述极柱电连接。
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