WO2023213066A1 - 盖板及电池 - Google Patents

盖板及电池 Download PDF

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Publication number
WO2023213066A1
WO2023213066A1 PCT/CN2022/130040 CN2022130040W WO2023213066A1 WO 2023213066 A1 WO2023213066 A1 WO 2023213066A1 CN 2022130040 W CN2022130040 W CN 2022130040W WO 2023213066 A1 WO2023213066 A1 WO 2023213066A1
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WO
WIPO (PCT)
Prior art keywords
housing
end surface
terminal
battery
cover plate
Prior art date
Application number
PCT/CN2022/130040
Other languages
English (en)
French (fr)
Inventor
肖天丽
岳亮亮
李尚益
黄利明
Original Assignee
湖北亿纬动力有限公司
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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
Publication of WO2023213066A1 publication Critical patent/WO2023213066A1/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
    • H01M50/147—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
    • H01M50/147—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
    • H01M50/543—Terminals
    • 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
    • H01M50/56—Cup shaped terminals
    • 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

  • This application relates to the field of battery technology, for example, to a cover plate and a battery.
  • most fully sealed batteries include an upper cover, a lower case and an internal battery core.
  • a sealing ring is generally provided between the upper cover and the lower case for sealing.
  • the manufacturing process of batteries with this structure is complicated and the cost is high. And it is difficult to ensure sealing performance only by relying on sealing rings to achieve sealing.
  • the upper cover in the related art has a plate-like structure, and the operation of electrically connecting the upper cover and the battery core is complicated and time-consuming.
  • This application provides a cover plate that can simplify the installation process between the cover plate and the housing and improve the assembly efficiency.
  • an embodiment of the present application provides a cover plate, which is configured to seal an electric core in a housing, and includes a protruding portion electrically connected to a first electrode of the electric core, and the The outer edge of the raised portion abuts against the inner wall of the housing.
  • the protruding portions are arc-shaped and there are multiple protruding portions, and the plurality of protruding portions are spaced apart along the circumferential direction of the cover plate.
  • the cover plate is provided with an explosion-proof valve.
  • an embodiment of the present application provides a battery, which has the advantages of excellent sealing, simple process, and low cost.
  • an embodiment of the present application provides a battery, including the above-mentioned cover plate, case, battery core and terminal,
  • the first end of the housing has an opening
  • the battery core is installed in the housing
  • the cover is welded to the opening and sealed with the opening
  • the terminal is connected to the second end of the housing.
  • the ends are sealed and insulated, and the first end of the terminal is electrically connected to the second electrode of the battery core, and the second end of the terminal protrudes from the second end surface of the housing.
  • an insulating gasket is further included, and the insulating gasket is disposed between the second electrode of the battery core and the second end surface of the housing, so that the second electrode of the battery core Insulated from the other end of the housing.
  • the cross section of the terminal is an I-shaped structure, and the terminal includes a first horizontal part, a vertical part and a second horizontal part,
  • the first horizontal part is electrically connected to the second electrode of the battery core, the second horizontal part is in contact with and insulated from the other end surface of the housing, and the vertical part passes through the housing.
  • the second end face of the body is sealed and insulated from the second end face of the housing.
  • an outer insulating member is further included, and the outer insulating member is disposed between the second horizontal part and the second end surface of the housing.
  • the outer insulating member is a hollow boss-shaped structure, and the outer insulating member is sleeved outside the vertical portion.
  • an inner insulating member is further included, and the inner insulating member is disposed between the first horizontal part and the second end surface of the housing.
  • the inner insulating member is a hollow boss-shaped structure, and the inner insulating member is sleeved outside the vertical portion.
  • the inner insulating member is sleeved on the outside of the outer insulating member.
  • it also includes:
  • Positive current collecting plate the positive current collecting plate is arranged between the second electrode of the electric core and the terminal, the first end surface of the positive current collecting plate and the second electrode of the electric core are connected by welding electrodes. Connection, the second end surface of the positive current collecting plate and the terminal are electrically connected by welding;
  • Negative current collector plate the negative current collector disk is arranged between the first electrode of the battery core and the cover plate, and one end surface of the negative electrode current collector plate is welded to the first electrode of the battery core. Electrically connected, the second end surface of the negative electrode current collecting plate and the cover plate are electrically connected by welding.
  • a protective glue is provided at the welding point between the cover plate and the housing.
  • the present application provides a cover plate.
  • a protruding portion at the bottom of the cover plate, it is beneficial to simplify the connection process between the cover plate and the battery core and improve the installation efficiency.
  • the outer edge of the protruding portion By arranging the outer edge of the protruding portion to contact the inner wall of the casing, the installation and positioning of the cover plate and the casing is facilitated.
  • the application also provides a battery, including the above-mentioned cover plate, casing, battery core and terminal.
  • the shell and the cover plate welded and sealed with the shell are the first electrode of the battery, and the terminal is the second electrode of the battery.
  • the internal resistance is lower, which is conducive to extending the above-mentioned Battery life.
  • the sealing performance is better than that in the related art where only a sealing ring is provided for sealing, which is beneficial to improving the sealing performance of the above-mentioned battery.
  • Figure 1 is a schematic structural diagram of a cover provided by an embodiment of the present application.
  • Figure 2 is a cross-sectional view of a battery provided by an embodiment of the present application.
  • Figure 3 is a partial enlarged view of Figure 1 at A;
  • Figure 4 is a partial enlarged view of Figure 1 at B.
  • 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 specific meanings of the above terms in this application can be understood on a case-by-case basis.
  • the term “above” or “below” a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • This embodiment provides a cover plate, which can simplify the installation process between the cover plate and the housing and improve the assembly efficiency.
  • the cover 100 is provided with a protruding portion 110 , and the protruding portion 110 is electrically connected to the first electrode 301 of the battery core 300 , so that the cover 100 and the case 200 are the first electrodes of the battery. Electrode 301.
  • Cell By providing the protruding portion 110, compared with the flat cover 100 in the related art, the connection process between the cover 100 and the first electrode 301 of the cell 300 is simplified. Since the cover 100 is connected to the first electrode 301 of the battery core 300 by welding, the provision of the protruding portion 110 can facilitate the welding operation and improve the assembly efficiency of the battery.
  • the outer edge of the protruding portion 100 is in contact with the inner wall of the casing 200, which plays a role in installation and positioning of the cover 100 and the casing 200, thereby improving the installation efficiency between the cover 100 and the casing 200.
  • the first electrode 301 may be a positive electrode or a negative electrode. In this embodiment, the first electrode 301 is a negative electrode.
  • the cover plate 100 is circular, so the protruding portion 110 can be an arc-shaped structure matching the cover plate 100 .
  • There may be multiple protrusions 110 and the plurality of protrusions 110 are spaced apart along the circumferential direction of the cover 100 .
  • an explosion-proof valve 120 can be provided on the cover 100 .
  • opening the explosion-proof valve 120 can discharge the gas in the housing 200 in a timely manner to avoid causing damage. Serious accidents such as explosions can reduce accident losses.
  • the application also provides a battery, which has the advantages of excellent sealing, simple process, and low cost.
  • the battery includes the above-mentioned cover 100, case 200, battery core 300 and terminal 400.
  • the first end of the casing 200 has an opening, and the battery core 300 is installed in the casing 200 through the opening.
  • the cover plate 100 is welded and sealed to the opening, so that the cover plate 100 and the casing 200 can fully seal the battery core 300 to avoid the outside world.
  • the water enters the inside of the casing 200 and causes the battery core 300 to short-circuit, extending the service life of the battery core 300.
  • the welded seal has better sealing performance, high structural stability, and easy processing.
  • the battery core 300 is an all-tab wound core.
  • the structure of the battery core 300 can also be other, and can be set according to actual needs.
  • the terminal 400 is connected to the second end of the housing 200, wherein the first end of the terminal 400 is electrically connected to the second electrode 302 of the battery core 300, and the second end of the terminal 400 protrudes from the second end surface of the housing 200, and the protruding portion As the second electrode 302 of the above-mentioned battery.
  • the connection between the terminal 400 and the second end surface of the housing 200 is sealed and insulated.
  • the battery can be An insulating gasket 500 is provided between the second electrode 302 of the core 300 and the second end surface of the case 200.
  • the insulating gasket 500 isolates the second electrode 302 of the core 300 from the second end surface of the case 200. , to ensure the reliability of the above-mentioned battery operation.
  • the shape of the insulating gasket 500 may be annular.
  • the size of the annular insulating gasket 500 is adapted to the second electrode 302 of the battery core 300 .
  • the opening in the middle of the insulating gasket 500 is provided.
  • the shape of the insulating gasket 500 can also be other, and can be set according to actual needs.
  • the cross-sectional shape of the terminal 400 may be I-shaped, and the terminal 400 includes a first horizontal part 410 , a vertical part 420 and a second horizontal part 430 .
  • the first horizontal part 410 is electrically connected to the second electrode 302 of the battery core 300 .
  • the second horizontal portion 430 is in insulating contact with the second end surface of the housing 200 and protrudes from the second end surface of the housing 200.
  • the second horizontal portion 430 serves as the second electrode 302 of the battery.
  • the vertical portion 420 is passed through the second end surface of the housing 200 in a sealed and insulating manner.
  • the cross-sectional shape of the terminal 400 can also be other, such as T-shaped, etc., which can be set according to actual needs.
  • the second electrode 302 of the battery core 300 and the terminal 400 are electrically connected by welding. In other embodiments, the second electrode 302 of the battery core 300 and the terminal 400 can also be electrically connected through other methods, which can be set according to actual needs.
  • an outer insulating member 600 may be provided between the second horizontal part 430 and the second end surface of the housing 200, The outer insulating member 600 has an insulating effect, which can effectively prevent the second horizontal portion 430 of the terminal 400 from contacting the second end surface of the housing 200 to cause a short circuit, thereby improving the reliability of battery operation.
  • the outer insulating member 600 has a hollow boss-shaped structure, and the outer insulating member 600 is sleeved outside the vertical portion 420 of the terminal 400 .
  • the horizontal section of the outer insulating member 600 of the hollow boss-shaped structure is disposed between the second horizontal portion 430 and the second end surface of the housing 200 .
  • the vertical section is disposed between the vertical part 420 of the terminal 400 and the second end of the housing 200, which can not only achieve insulation between the second horizontal part 430 of the terminal 400 and the second end surface of the housing 200, but also can Insulation between the vertical portion 420 of the terminal 400 and the second end of the housing 200 is achieved.
  • the shape of the outer insulating member 600 can also be other, and can be set according to actual needs.
  • the outer insulation member 600 may be made of flexible material.
  • the flexible material has the ability to elastically deform, and can be in close contact with the terminal 400 and the second end surface of the housing 200 through its own deformation. While ensuring the insulation between the terminal 400 and the second end surface of the housing 200, it can improve the insulation of the terminal 400.
  • the sealing performance with the second end surface of the casing 200 further improves the sealing performance of the above-mentioned battery.
  • a gap may be provided between the first horizontal part 410 and the second end surface of the housing 200 .
  • the inner insulating member 700 has an insulating effect, which can effectively prevent the first horizontal portion 410 of the terminal 400 from contacting the second end surface of the housing 200 and cause a short circuit, thereby improving the reliability of the above-mentioned battery operation.
  • the inner insulating member 700 is a hollow boss-shaped structure, and the inner insulating member 700 is sleeved on the outside of the vertical portion 420 of the terminal 400 .
  • the horizontal section of the inner insulating member 700 of the hollow boss-shaped structure is disposed between the first horizontal portion 410 and the second end surface of the housing 200 .
  • the vertical section is disposed between the vertical portion 420 of the terminal 400 and the second end of the housing 200, which can not only achieve insulation between the first horizontal portion 410 of the terminal 400 and the second end surface of the housing 200, but also can Insulation between the vertical portion 420 of the terminal 400 and the second end of the housing 200 is achieved.
  • the shape of the inner insulating member 700 can also be other, and can be set according to actual needs.
  • the inner insulating member 700 can also be placed outside the outer insulating member 600 , and the horizontal section of the inner insulating member 700 with a hollow boss-shaped structure is disposed between the first horizontal part 410 and the second end surface of the housing 200 .
  • the vertical section is disposed between the vertical section of the outer insulating member 600 and the second end surface of the housing 200, which is beneficial to improving the insulation performance between the vertical portion 420 of the terminal 400 and the second end of the housing 200.
  • the inner insulation member 700 may be made of flexible material.
  • the flexible material has the ability to elastically deform, and can be in close contact with the terminal 400 and the second end surface of the housing 200 through its own deformation. While ensuring the insulation between the terminal 400 and the second end surface of the housing 200, it can improve the insulation of the terminal 400.
  • the sealing performance with the second end surface of the casing 200 thereby improves the sealing performance of the battery.
  • the battery may further include a positive current collecting plate 800 and a negative current collecting plate 900 .
  • the positive current collecting plate 800 is disposed between the second electrode 302 of the battery core 300 and the terminal 400.
  • the first end surface of the positive electrode current collecting plate 800 and the second electrode 302 of the battery core 300 are electrically connected by welding.
  • the second end surface of the positive current collecting plate 800 and the terminal 400 are electrically connected by welding.
  • the negative current collecting plate 900 is disposed between the first electrode 301 of the battery core 300 and the cover 100.
  • the first end surface of the negative electrode current collecting plate 900 and the first electrode 301 of the battery core 300 are electrically connected by welding.
  • the second end surface of the negative electrode current collecting plate 900 is electrically connected to the cover plate 100 by welding.
  • protective glue can be provided at the welding point between the cover plate 100 and the case 200. On the one hand, it can improve the sealing performance between the cover plate 100 and the case 200; on the other hand, it can improve the sealing performance between the cover plate 100 and the case. 200 of the welding seam is protected to prevent the welding seam from rusting and cracking, and improves the reliability of the connection between the cover plate 100 and the housing 200.
  • the protective glue is ultraviolet rays (UV) glue. UV glue has the advantage of rapid curing, which is beneficial to strengthening the seal between the cover 100 and the housing 200 .
  • the protective glue can also be made of other materials, which can be selected according to actual needs.

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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

一种盖板及电池，盖板包括凸起部，凸起部与电芯的第一电极电连接，凸起部的外边缘与壳体的内壁抵接。电池包括盖板、壳体、电芯以及端子，壳体的第一端具有开口，电芯安装在壳体内，盖板焊接密封于开口，端子与壳体的第二端密封且绝缘地连接，且端子的第一端与电芯的第二电极电连接，端子的第二端突出壳体的第二端端面。

Description

盖板及电池
本申请要求申请日为2022年5月5日、申请号为202221052444.6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，例如涉及一种盖板及电池。
背景技术
相关技术中，大多的全密封电池包括上盖、下壳以及内部电芯，为了使上盖和下壳的连接处密封，一般在上盖和下壳之间设置密封圈进行密封。但是这种结构的电池在制造工艺上较为繁琐，成本较高。且仅靠密封圈来实现密封，很难保证密封性能。且相关技术中的上盖为板状结构，上盖与电芯电连接的操作较为复杂，花费时间较多。
发明内容
本申请提供了一种盖板，能够简化盖板与壳体之间的安装工序，提高装配效率。
第一方面，本申请一实施例提供了一种盖板，设置为将电芯密封在壳体内，包括凸起部，所述凸起部与所述电芯的第一电极电连接，所述凸起部的外边缘与所述壳体的内壁抵接。
在一实施例中，所述凸起部为弧形且设有多个，所述多个凸起部沿所述盖板的周向间隔设置。
在一实施例中，所述盖板上设有防爆阀。
第二方面，本申请一实施例提供一种电池，具有密封优良，工艺简单，成本低廉的优点。
第二方面，本申请一实施例提供了一种电池，包括上述的盖板、壳体、电芯以及端子，
所述壳体的第一端具有开口，所述电芯安装在所述壳体内，所述盖板与所述开口焊接且与所述开口密封设置，所述端子与所述壳体的第二端密封且绝缘地连接，且所述端子的第一端与所述电芯的第二电极电连接，所述端子的第二端突出所述壳体的第二端端面。
在一实施例中，还包括绝缘垫片，所述绝缘垫片设置在所述电芯的第二电极与所述壳体的第二端端面之间，以使所述电芯的第二电极与所壳体的另一端端面绝缘。
在一实施例中，所述端子的横截面为工字型结构，所述端子包括第一水平部、竖直部以及第二水平部，
所述第一水平部与所述电芯的第二电极电连接，所述第二水平部与所述壳体的另一端端面抵接并绝缘设置，所述竖直部穿设于所述壳体的第二端端面内，并与所述壳体的第二端端面密封且绝缘设置。
在一实施例中，还包括外绝缘件，所述外绝缘件设置在所述第二水平部与所述壳体的第二端端面之间。
在一实施例中，所述外绝缘件为中空凸台型结构，所述外绝缘件套设于所述竖直部外。
在一实施例中，还包括内绝缘件，所述内绝缘件设置在所述第一水平部与所述壳体的第二端端面之间。
在一实施例中，所述内绝缘件为中空凸台型结构，所述内绝缘件套设于所述竖直部外部。
在一实施例中，所述内绝缘件套设在所述外绝缘件的外部。
在一实施例中，还包括：
正极集流盘，所述正极集流盘设置在所述电芯的第二电极与所述端子之间，所述正极集流盘的第一端面与所述电芯的第二电极通过焊接电连接，所述正极集流盘的第二端面与所述端子通过焊接电连接；及
负极集流盘，所述负极集流盘设置在所述电芯的第一电极与所述盖板之间，所述负极集流盘的一端面与所述电芯的第一电极通过焊接方式电连接，所述负极集流盘的第二端面与所述盖板通过焊接方式电连接。
在一实施例中，所述盖板与所述壳体的焊接处设有防护胶。
本申请的有益效果：
本申请提供了一种盖板，通过在盖板的底部设置凸起部，有利于简化盖板与电芯之间的连接工序，提高安装效率。通过设置凸起部的外边缘与壳体的内壁抵接，有利于盖板与壳体的安装定位。
本申请还提供一种电池，包括上述的盖板、壳体、电芯以及端子。其中，壳体以及与壳体焊接密封的盖板为电池的第一电极，端子为电池的第二电极，与相关技术中采用不锈钢壳体作为正极相比，内阻更低，有利于延长上述电池的使用寿命。
通过设置盖板与壳体之间为焊接密封，与相关技术中仅设置密封圈进行密封相比，密封性能更加优良，有利于提高上述电池的密封性能。
附图说明
图1是本申请一实施例提供的盖板的结构示意图；
图2是本申请一实施例提供的电池的剖视图；
图3是图1在A处的局部放大图；
图4是图1在B处的局部放大图。
图中：
100、盖板；110、凸起部；120、防爆阀；200、壳体；300、电芯；301、第一电极；302、第二电极；400、端子；410、第一水平部；420、竖直部；430、第二水平部；500、绝缘垫片；600、外绝缘件；700、内绝缘件；800、正极集流盘；900、负极集流盘。
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。
在本实施例的描述中，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。
本实施例提供一种盖板，能够简化盖板与壳体之间的安装工序，提高装配效率。
示例性地，如图1所示，盖板100上设有凸起部110，凸起部110与电芯300的第一电极301电连接，使得盖板100以及壳体200为电池的第一电极301。电芯 通过设置凸起部110，与相关技术中的平板式盖板100相比，简化了盖板100与电芯300的第一电极301的连接工艺。由于通过焊接的方式将盖板100与电芯300的第一电极301相连，因此凸起部110的设置能够便于焊接操作，提高电池的装配效率。凸起部100的外边缘与壳体200的内壁抵接，起到对盖板100与壳体200的安装定位作用，提高盖板100与壳体200之间的安装效率。第一电极301可以为正极或者负极，在本实施例中，第一电极301为负极。
在本实施例中，盖板100为圆形，因此，凸起部110可以为与盖板100相匹配的弧形结构。凸起部110可以设有多个，多个凸起部110沿盖板100的周向间隔设置。
示例性地，继续参见图1，可以在盖板100上设置一个防爆阀120，当电芯300出现热失控等现象时，打开防爆阀120能够将壳体200内的气体及时排放出去，避免造成爆炸等严重事故，降低事故的损失。
本申请还提供一种电池，具有密封优良，工艺简单，成本低廉的优点。
示例性地，如图1-4所示，该电池包括上述的盖板100、壳体200、电芯300以及端子400。其中，壳体200的第一端具有开口，电芯300通过开口安装在壳体200内，盖板100焊接密封于开口，使得盖板100和壳体200可以对电芯300全密封，避免外界的水进入壳体200内部而导致电芯300短路，延长电芯300的使用寿命。且与相关技术通过密封圈密封盖板100和壳体200相比，焊接密封的密封性能更加优良，且结构稳定性高，加工方便。在本实施例中，电芯300为全极耳卷芯。在其它实施例中，电芯300的结构也可以为其它，根据实际需要设置即可。端子400连接于壳体200的第二端，其中，端子400的第一端与电芯300的第二电极302电连接，端子400的第二端突出壳体200的第二端端面，突出部分作为上述电池的第二电极302。端子400与壳体200的第二端端面的相连处密封且绝缘。
示例性地，如图2所示，由于壳体200为上述电池的第一电极301，为了避免电芯300的第二电极302与壳体200的第二端端面接触而导致短路，可以在电芯300的第二电极302与壳体200的第二端端面之间设置绝缘垫片500，通过绝缘垫片500将电芯300的第二电极302和壳体200的第二端端面之间隔离，保证上述电池工作的可靠性。
在一个实施例中，绝缘垫片500的形状可以为圆环形，圆环形的绝缘垫片500的尺寸与电芯300的第二电极302相适配，绝缘垫片500中间的开孔设置为避让端子400。在其它实施例中，绝缘垫片500的形状也可以为其它，根据实际需要设置即可。
示例性地，继续参见图2，在一实施例中，端子400的横截面形状可以为工字型，端子400包括第一水平部410、竖直部420以及第二水平部430。其中，第一水平部410与电芯300的第二电极302电连接。第二水平部430与壳体200的第二端端面绝缘抵接，且突出壳体200的第二端端面，第二水平部430作为上述电 池的第二电极302。竖直部420密封绝缘地穿设于壳体200的第二端端面。在其它实施例中，端子400的横截面形状也可以为其它，如T型等，根据实际需要设置即可。
在本实施例中，电芯300的第二电极302与端子400之间通过焊接的方式电连接。在其它实施例中，电芯300的第二电极302与端子400之间也可以通过其他方式电连接，根据实际需要设置即可。
示例性地，为了避免第二水平部430与壳体200的第二端端面接触而导致短路，可以在第二水平部430与壳体200的第二端端面之间设置一个外绝缘件600，外绝缘件600具有绝缘作用，能够有效避免端子400的第二水平部430与壳体200的第二端端面接触而短路，提高电池工作的可靠性。
在一实施例中，外绝缘件600为中空凸台型结构，外绝缘件600套设在端子400的竖直部420外部。在一实施例中，中空凸台型结构的外绝缘件600的水平段设置在第二水平部430与壳体200的第二端端面之间。竖直段设置在端子400的竖直部420与壳体200的第二端之间，既能实现端子400的第二水平部430与壳体200的第二端端面之间的绝缘，也能实现端子400的竖直部420与壳体200的第二端之间的绝缘。在其它实施例中，外绝缘件600的形状也可以为其它，根据实际需要设置即可。
示例性地，外绝缘件600可以采用柔性材料制成。柔性材料具有弹性变形能力，能够通过自身形变与端子400以及壳体200的第二端端面紧密接触，在保证端子400与壳体200的第二端端面之间的绝缘的同时，能够提高端子400与壳体200的第二端端面之间的密封性能，进而提高上述电池的密封性能。
示例性地，继续参见图2，为了避免第一水平部410与壳体200的第二端端面接触而导致短路，可以在第一水平部410与壳体200的第二端端面之间设置一个内绝缘件700，内绝缘件700具有绝缘作用，能够有效避免端子400的第一水平部410与壳体200的第二端端面接触而短路，提高上述电池工作的可靠性。
在一实施例中，内绝缘件700为中空凸台型结构，内绝缘件700套设在端子400的竖直部420的外部。在一实施例中，中空凸台型结构的内绝缘件700的水平段设置在第一水平部410与壳体200的第二端端面之间。竖直段设置在端子400的竖直部420与壳体200的第二端之间，既能实现端子400的第一水平部410与壳体200的第二端端面之间的绝缘，也能实现端子400的竖直部420与壳体200的第二端之间的绝缘。在其它实施例中，内绝缘件700的形状也可以为其它，根据实际需要设置即可。
示例性地，内绝缘件700还可以套设在外绝缘件600的外部，中空凸台型结构的内绝缘件700的水平段设置在第一水平部410与壳体200的第二端端面之间。竖直段设置在外绝缘件600的竖直段与壳体200的第二端端面之间，有利于提高端子400的竖直部420与壳体200的第二端之间的绝缘性能。
示例性地，内绝缘件700可以采用柔性材料制成。柔性材料具有弹性变形 能力，能够通过自身形变与端子400以及壳体200的第二端端面紧密接触，在保证端子400与壳体200的第二端端面之间的绝缘的同时，能够提高端子400与壳体200的第二端端面之间的密封性能，进而提高电池的密封性能。
示例性地，电池还可以包括正极集流盘800和负极集流盘900。其中，正极集流盘800设置在电芯300的第二电极302与端子400之间，示例性地，正极集流盘800的第一端面与电芯300的第二电极302通过焊接电连接，正极集流盘800的第二端面与端子400通过焊接来电连接。负极集流盘900设置在电芯300的第一电极301与盖板100之间，在一实施例中，负极集流盘900的第一端面与电芯300的第一电极301通过焊接电连接，负极集流盘900的第二端面与盖板100通过焊接的方式电连接。通过设置正极集流盘800和负极集流盘900，能够提高电芯300与端子400和盖板100的电连接强度，保证电池工作的可靠性。
示例性地，可以在盖板100和壳体200的焊接处设置防护胶，一方面，能够提高盖板100与壳体200之间的密封性能；另一方面，能够对盖板100和壳体200的焊缝进行防护，避免焊缝锈蚀开裂，提高盖板100与壳体200之间连接的可靠性。在本实施例中，防护胶为无影胶(Ultraviolet Rays,UV)胶,UV胶具有快速固化的优点，有利于加固盖板100与壳体200之间的密封。在其他实施例中，防护胶也可以为其他材料，根据实际需要选择即可。

Claims (13)

  1. 一种盖板，设置为将电芯密封在壳体内，所述盖板包括凸起部(110)，所述凸起部(110)与所述电芯(300)的第一电极(301)电连接，所述凸起部(110)的外边缘与所述壳体(200)的内壁抵接。
  2. 根据权利要求1所述的盖板，其中，所述凸起部(110)为弧形且设有多个，所述多个凸起部(110)沿所述盖板(100)的周向间隔设置。
  3. 根据权利要求1所述的盖板，其中，所述盖板(100)上设有防爆阀(120)。
  4. 一种电池，包括根据权利1-3任一项所述的盖板(100)、壳体(200)、电芯(300)以及端子(400)，
    所述壳体(200)的第一端具有开口，所述电芯(300)安装在所述壳体(200)内，所述盖板(100)与所述开口焊接且与所述开口密封设置，所述端子(400)与所述壳体(200)的第二端密封且绝缘地连接，且所述端子(400)的第一端与所述电芯(300)的第二电极(302)电连接，所述端子(400)的第二端突出所述壳体(200)的第二端端面。
  5. 根据权利要求4所述的电池，还包括绝缘垫片(500)，所述绝缘垫片(500)设置在所述电芯(300)的第二电极(302)与所述壳体(200)的第二端的端面之间，以使所述电芯(300)的第二电极(302)与所壳体(200)的第二端的端面绝缘。
  6. 根据权利要求4所述的电池，其中，所述端子(400)的横截面为工字型结构，所述端子(400)包括第一水平部(410)、竖直部(420)以及第二水平部(430)，
    所述第一水平部(410)与所述电芯(300)的第二电极(302)电连接，所述第二水平部(430)与所述壳体(200)的第二端端面抵接并相互绝缘，所述竖直部(420)穿设于所述壳体(200)的第二端端面内，并与所述壳体(200)的第二端端面密封且相互绝缘。
  7. 根据权利要求6所述的电池，还包括外绝缘件(600)，所述外绝缘件(600)设置在所述第二水平部(430)与所述壳体(200)的第二端端面之间。
  8. 根据权利要求7所述的电池，其中，所述外绝缘件(600)为中空凸台型结构，所述外绝缘件(600)套设于所述竖直部(420)外。
  9. 根据权利要求7所述的电池，还包括内绝缘件(700)，所述内绝缘件(700)设置在所述第一水平部(410)与所述壳体(200)的第二端端面之间。
  10. 根据权利要求9所述的电池，其中，所述内绝缘件(700)为中空凸台型结构，所述内绝缘件(700)套设于所述竖直部(420)外部。
  11. 根据权利要求10所述的电池，其中，所述内绝缘件(700)套设在所述外绝缘件(600)外部。
  12. 根据权利要求4-11任一项所述的电池，还包括：
    正极集流盘(800)，所述正极集流盘(800)设置在所述电芯(300)的第二电极(302)与所述端子(400)之间，所述正极集流盘(800)的第一端面与所述电芯(300)的第二电极(302)通过焊接电连接，所述正极集流盘(800)的第二端面与所述端子(400)通过焊接电连接；及
    负极集流盘(900)，所述负极集流盘(900)设置在所述电芯(300)的第一电极(301)与所述盖板(100)之间，所述负极集流盘(900)的第一端面与所述电芯(300)的第一电极(301)通过焊接方式电连接，所述负极集流盘(900)的第二端面与所述盖板(100)通过焊接方式电连接。
  13. 根据权利要求4-11任一项所述的电池，其中，所述盖板(100)与所述壳体(200)的焊接处设有防护胶。
PCT/CN2022/130040 2022-05-05 2022-11-04 盖板及电池 WO2023213066A1 (zh)

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