WO2022206950A1 - 电池盖板以及电池 - Google Patents

电池盖板以及电池 Download PDF

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Publication number
WO2022206950A1
WO2022206950A1 PCT/CN2022/084797 CN2022084797W WO2022206950A1 WO 2022206950 A1 WO2022206950 A1 WO 2022206950A1 CN 2022084797 W CN2022084797 W CN 2022084797W WO 2022206950 A1 WO2022206950 A1 WO 2022206950A1
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WO
WIPO (PCT)
Prior art keywords
cover plate
battery
hole
cap
cover
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PCT/CN2022/084797
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English (en)
French (fr)
Inventor
杨昆仑
李正冬
陈志勇
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广东微电新能源有限公司
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Application filed by 广东微电新能源有限公司 filed Critical 广东微电新能源有限公司
Publication of WO2022206950A1 publication Critical patent/WO2022206950A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/153—Lids or covers characterised by their shape for button or coin 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure relates to the technical field of batteries, and more particularly, to a battery cover plate and a battery.
  • Lithium-ion batteries have been widely used in various fields such as MP3, mobile phones, and digital cameras. Lithium-ion batteries have the advantages of high voltage, large capacity, long cycle life, and light weight.
  • a liquid injection hole for adding electrolyte is opened on the case cover. After the liquid injection is completed, the liquid injection hole on the case cover needs to be laser sealed and welded to prevent the electrolyte. of leakage.
  • the specific implementation process is to first plug the liquid injection hole with a sealing cover plate, seal the welding part of the sealing cover plate and the liquid injection hole by laser full welding, and form a full welding seam after welding. Therefore, in the prior art, the liquid injection hole is sealed by welding the sealing cover plate and the shell cover plate, and the welding energy when the sealing cover plate and the shell cover plate are welded easily affects the properties of the electrolyte in the shell.
  • the present disclosure provides a novel battery cover plate and a battery.
  • a battery cover includes: a first cover plate, a second cover plate and a cap;
  • a first through hole is formed through the first cover plate along its thickness direction, and the first cover plate is used for connecting with the battery case;
  • the second cover plate is covered on the first through hole, the second cover plate is connected with the first cover plate, and an insulation is provided between the first cover plate and the second cover plate piece;
  • a second through hole is formed through the second cover plate along its thickness direction, and the second through hole serves as a liquid injection hole;
  • the cap When liquid injection is completed through the second through hole, the cap is provided on the second through hole, and the cap is connected to the second cover plate.
  • the cap is a metal part.
  • a groove is provided on the surface of the cap away from the second cover plate.
  • the cover cap is welded to the second cover plate.
  • a concave portion is formed on the second cover plate, and the concave portion is located in the first through hole;
  • a first connecting part is formed at the first end of the concave part, and the first connecting part is connected with the first cover plate; the second end of the concave part is formed There is a second connection part, and the second connection part is connected with the first cover plate.
  • the recessed portion includes a flat portion, a first connecting segment and a second connecting segment;
  • One end of the first connecting segment is connected to the flat portion, the other end of the first connecting segment is connected to the first connecting portion, and a first arc is formed at the connection between the first connecting segment and the flat portion shape;
  • One end of the second connection segment is connected to the plane portion, the other end of the second connection segment is connected to the second connection portion, and a second arc is formed at the connection between the second connection segment and the plane portion shape.
  • the second through hole is formed on the flat portion, and the flat portion supports the cap.
  • a gap is formed between the first cover plate and the recessed portion.
  • the thickness of the battery cover plate ranges from 0.1 mm to 0.3 mm.
  • a battery includes: a battery case and the battery cover according to the first aspect;
  • the first cover plate is welded to the battery case.
  • One technical effect of the present disclosure is to provide a battery cover plate, which includes a first cover plate, a second cover plate and a cap.
  • the second cover plate is provided with a second through hole, and the second through hole is used as a liquid injection hole. After the electrolyte is injected into the battery through the second through hole, it is only necessary to cover the cap on the second through hole, and connect the cap to the second cover plate. After the electrolyte, the casing and the casing cover need to be welded.
  • the cover only needs to be connected to the second cover, and no further After the liquid is injected, the welding operation of the shell and the shell cover is carried out, the connection area is much smaller, and the impact on the electrolyte is small.
  • FIG. 1 is a schematic diagram of an internal structure of a battery according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic structural diagram of the battery shown in FIG. 1 .
  • FIG. 3 is a schematic diagram showing the internal structure of a battery according to still another embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of the battery shown in FIG. 3 .
  • the battery cover plate 1 includes: a first cover plate 11 , a second cover plate 12 and a cap 13 .
  • a first through hole 111 is formed through the first cover plate 11 along the thickness direction thereof, and the first cover plate 11 is used for connecting with the battery case 2 .
  • the second cover plate 12 is covered on the first through hole 111 , the second cover plate 12 is connected with the first cover plate 11 and the first cover plate 11 and the second cover plate An insulating member 14 is provided between 12 .
  • a second through hole 121 is formed through the second cover plate 12 along its thickness direction, and the second through hole 121 serves as a liquid injection hole. When liquid injection is completed through the second through hole 121 , the cap 13 is covered on the second through hole 121 , and the cap 13 is connected to the second cover plate 12 .
  • the first cover plate 11 is provided with a first through hole 111 , and the first through hole 111 penetrates along the thickness direction of the first cover plate 11 .
  • the first cover 11 is used to connect with the battery case 2 .
  • the first cover plate 11 is connected to the battery case 2 , the first cover plate 11 and the battery case 2 enclose a cavity, and the cell 3 is accommodated in the cavity.
  • the second cover plate 12 is covered on the first through hole 111 , for example, the radial dimension of the second cover plate 12 is larger than the radial dimension of the first through hole 111 , and the second cover plate 12 is covered on the first through hole 111 , A part of the second cover plate 12 can be connected with the first cover plate 11 .
  • an insulating member 14 is provided between the second cover plate 12 and the first cover plate 11, and the insulating member 14 is used to isolate the second cover plate 12 and the first cover plate 11 to avoid short circuit of the battery caused by direct contact between the second cover plate 12 and the first cover plate 11 .
  • the second cover plate 12 is provided with a second through hole 121 , and the second through hole 121 penetrates along the thickness direction of the second cover plate 12 .
  • the second through holes 121 are used as liquid injection holes, and the second through holes 121 are used to inject electrolyte. Therefore, before injecting the electrolyte into the battery through the second through hole 121, it is necessary to connect the first cover plate 11 to the battery case 2, and then cover the second cover plate 12 on the first through hole 111 and cover the second cover plate 111.
  • the plate 12 is connected to the first cover plate 11 .
  • the second through hole 121 is covered by the cap 13 to avoid the overflow of the electrolyte in the battery case.
  • the casing and the casing cover need to be welded (wherein the welding length of the casing and the casing cover is longer when welding is performed, The generated welding energy is large, and the welding energy easily affects the properties of the electrolyte).
  • the connection area is much smaller, and the influence on the electrolyte is small.
  • the material of the cover cap 13 is the same as that of the second cover plate 12 .
  • the cover cap 13 and the second cover plate 12 are made of metal material.
  • the cover cap 13 and the second cover plate 12 can be used as connection terminals for electrical connection with the tabs 31 of the battery core 3.
  • the cover cap 13 or the second cover plate 12 can be used as the electrode A terminal pulls the current out.
  • the second cover plate 12 is electrically connected to the tabs 31 .
  • the cap 13 is a metal part. Further, as shown in FIG. 3 , a groove 132 is provided on the surface of the cover cap 13 away from the second cover plate 12 .
  • the cap 13 is a stainless steel plate or an aluminum plate or the like.
  • the material of the cap 13 is stainless steel
  • the battery cover 1 when the battery cover 1 is applied to the battery and the internal pressure of the battery is high, the internal pressure of the battery increases and the internal temperature of the battery increases, and the insulating member 14 is located inside the battery. The temperature rises and melts, so that a gap is created between the second cover plate 12 and the first cover plate 11 to facilitate the battery to release pressure.
  • the material of the cap 13 is made of aluminum material
  • the battery cover plate 1 when the battery cover plate 1 is applied to the battery and the internal pressure of the battery is relatively large, the aluminum material is light in weight, and a groove is provided on the surface of the aluminum material. , the internal pressure of the battery causes the aluminum cap 13 to be ruptured through the groove, which is convenient for the battery to be depressurized.
  • the cover cap 13 is welded with the second cover plate 12 .
  • the first cover plate 11 is used to connect with the battery case 2 .
  • the second cover plate 12 is covered on the first through hole 111 of the first cover plate 11
  • the cap 13 is covered on the second through hole 121 . Therefore, the perimeter dimension of the first cover plate 11 is larger than the perimeter dimension of the cap 13 .
  • the electrolyte after the electrolyte is injected into the battery through the liquid injection hole, it is only necessary to weld the cap 13 and the second cover plate 12, and it is not necessary to re-inject the liquid, and then perform the casing and the casing cover plate.
  • the welding area is much smaller, the heat generated is also less, and the impact on the electrolyte is less.
  • a concave portion 122 is formed on the second cover plate 12 , and the concave portion 122 is located in the first through hole 111 ;
  • a first connecting portion 124 is formed at the first end of the recessed portion 122, and the first connecting portion 124 is connected with the first cover plate 11; the recessed portion A second connection portion 125 is formed at the second end of the 122 , and the second connection portion 125 is connected to the first cover plate 11 .
  • the second cover plate 12 is formed by integral molding.
  • the concave portion 122 can be formed directly on the second cover plate 12 after the second cover plate 12 is formed.
  • the concave portion 122 may be formed on the second cover plate 12 by bending or the like.
  • a certain area segment of the second cover plate 12 is integrally recessed relative to other area segments of the second cover plate 12 .
  • the second cover plate 12 covers the first through hole 111 by positioning the concave portion 122 in the first through hole 111 .
  • the first connecting portion 124 is connected to the recessed portion 122 , and at the same time, the first connecting portion 124 is located above the first cover plate 11 , and an insulating member 14 is disposed between the first connecting portion 124 and the first cover plate 11 .
  • the second connecting portion 125 is connected to the recessed portion 122 , and the second connecting portion 125 is located above the first cover plate 11 , and there is an insulating member 14 between the second connecting portion 125 and the first cover plate 11 .
  • a concave portion 122 is formed on the second cover plate 12, and the cap 13 is welded on the concave portion 122.
  • the cap 13 does not protrude from the outer surface of the second cover plate 12, so that the thickness of the battery cover plate 1 is thinner.
  • the battery cover 1 is applied to the battery, which is beneficial to reduce the overall height of the battery.
  • a concave portion 122 is formed on the second cover plate 12, and the cap 13 is welded on the concave portion 122, so that both the concave portion 122 and the cap 13 of the second cover plate 12 are closer to the tab 31, which is convenient for the second cover plate 12
  • the recesses 122 of the plate 12 or the caps 13 are welded to the tabs 31 .
  • the recessed portion 122 includes a flat portion 1221 , a first connecting segment 1222 and a second connecting segment 1223 .
  • One end of the first connecting section 1222 is connected to the plane portion 1221 , the other end of the first connecting section 1222 is connected to the first connecting portion 124 , and the first connecting section 1222 is connected to the plane portion 1221 A first arc-shaped surface 123 is formed there.
  • One end of the second connecting section 1223 is connected to the plane portion 1221 , the other end of the second connecting section 1223 is connected to the second connecting portion 125 , and the second connecting section 1223 is connected to the plane portion 1221 A second arc-shaped surface is formed there.
  • first connecting section 1222 and the plane part 1221 are connected through the first arc surface 123, and the second connecting section 1223 and the plane part 1221 are connected through the second arc surface, so as to prevent the first connecting section 1222 and the second connecting section 1223 from being connected to the plane Right edges and right angles appear at the connection of the parts 1221 , which improves the structural strength of the second cover plate 12 .
  • the second through hole 121 is formed on the plane portion 1221 , and the plane portion 1221 supports the cap 13 .
  • the concave portion 122 is located in the first through hole 111 .
  • the cap 13 is located on the plane portion 1221, which can reduce the overall thickness of the battery cover plate 1 to a certain extent.
  • the cover cap 13 is arranged on the plane portion 1221, and a third arc-shaped surface 131 is formed on the surface of the cover cap 13 in contact with the plane portion 1221, so as to avoid a right edge and a right angle at the connection between the cover cap 13 and the plane portion 1221, which affects the connection between the cover cap 13 and the plane portion 1221. Welding strength of the flat portion 1221 .
  • a gap is formed between the first cover plate 11 and the recessed portion 122 .
  • the concave portion 122 is located in the first through hole 111, and the radial dimension of the plane portion 1221 of the concave portion 122 is smaller than the radial dimension of the first through hole 111, A gap is formed between the first cover plate 11 and the recessed portion 122 . Since a gap is formed between the first cover plate 11 and the concave portion 122 , when the internal pressure of the battery increases, it is convenient to release the pressure of the battery.
  • the first connecting segment 1222 and the second connecting segment 1223 are inclined relative to the plane portion 1221 .
  • the outer surface of the first connecting segment 1222 , the outer surface of the second connecting segment 1223 , and the end surface of the first cover plate 11 forming the inner surface of the first through hole 111 are enclosed to form a gap.
  • the thickness of the battery cover plate 1 ranges from 0.1 mm to 0.3 mm. In the embodiment of the present disclosure, due to the structural design of the battery cover plate 1 , the thickness of the battery cover plate 1 is in the range of 0.1 mm-0.3 mm, which reduces the thickness of the battery cover plate 1 . The application of the battery cover 1 to the battery reduces the overall height of the battery.
  • a battery is provided.
  • the battery includes: a battery case 2 and the battery cover 1 as described in the first aspect.
  • the first cover plate 11 is welded to the battery case 2 .
  • the battery case 2 includes side walls, the side walls are enclosed in the circumferential direction of the battery case 2 , and the side walls are enclosed in a cylindrical shape or the side walls are enclosed in a cubic structure. At least one end of the battery case 2 forms an opening, and the battery cover 1 closes the opening.
  • the battery case 2 includes a side wall and a bottom wall, wherein the side wall and the bottom wall are integrally formed.
  • the end of the battery case 2 opposite to the bottom wall forms an opening, and the battery cover plate 1 closes the opening.
  • the first cover plate 11 and the battery case 2 can be connected by laser welding or resistance welding.
  • the battery case 2 is a single-layer case. This example reduces the thickness of the battery case, thereby reducing the weight of the battery. Batteries are applied to electronic devices, thereby reducing the weight of electronic devices.
  • the battery is a cylindrical battery.
  • the battery can be applied to other electronic devices such as mobile phones, watches, tablet computers, game consoles, or remote controls.

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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)
  • Materials Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

提供了一种电池盖板（1）以及电池。电池盖板（1）包括：第一盖板（11）、第二盖板（12）和盖帽（13）；第一盖板（11）沿其厚度方向贯穿形成第一通孔（111），第一盖板（11）用于与电池壳体（2）连接；第二盖板（12）盖设在第一通孔（111）上，第二盖板（12）与第一盖板（11）连接且第一盖板（11）与第二盖板（12）之间设置有绝缘件（14）；第二盖板（12）沿其厚度方向贯穿形成第二通孔（121），第二通孔（121）作为注液孔；在通过第二通孔（121）完成注液的情况下，盖帽（13）盖设在第二通孔（121）上，盖帽（13）与第二盖板（12）连接。

Description

电池盖板以及电池
本申请要求于2021年04月02日提交中国专利局，申请号为202120688069.3，申请名称为“电池盖板以及电池”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及电池技术领域，更具体地，本公开涉及一种电池盖板以及电池。
背景技术
锂离子电池已经被广泛应用于MP3、手机、数码相机等各种领域，锂离子电池具有电压高、容量大、长循环寿命、质量轻等优点。
传统的锂离子电池结构中，在壳体盖板上开设有用于添加电解液的注液孔，在完成注液后需要将壳体盖板上的注液孔进行激光密封焊接，以防止电解液的泄漏。具体实施过程是先用密封盖板塞住注液孔，将密封盖板和注液孔的焊接部位用激光满焊的方式来密封，焊接完形成满焊焊缝。因此现有技术中是通过将密封盖板与壳体盖板焊接对注液孔进行密封，密封盖板与壳体盖板焊接时的焊接能量容易影响壳内电解液的性质。
发明内容
为了解决上述技术问题，本公开提供了一种新型的电池盖板以及电池。
根据本公开第一方面，提供了一种电池盖板。所述电池盖板包括：第一盖板、第二盖板和盖帽；
所述第一盖板沿其厚度方向贯穿形成第一通孔，所述第一盖板用于与电池壳体连接；
所述第二盖板盖设在所述第一通孔上，所述第二盖板与所述第一盖板连接且所述第一盖板与所述第二盖板之间设置有绝缘件；
所述第二盖板沿其厚度方向贯穿形成第二通孔，所述第二通孔作为注液孔；
在通过所述第二通孔完成注液的情况下，所述盖帽盖设在所述第二通孔上，所述盖帽与所述第二盖板连接。
可选地，所述盖帽为金属部件。
可选地，所述盖帽远离所述第二盖板的表面上设置有刻槽。
可选地，所述盖帽与所述第二盖板焊接。
可选地，所述第二盖板上形成有凹陷部，所述凹陷部位于所述第一通孔内；
沿所述第二盖板的长度方向，所述凹陷部的第一端形成有第一连接部，所述第一连接部与所述第一盖板连接；所述凹陷部的第二端形成有第二连接部，所述第二连接部与所述第一盖板连接。
可选地，所述凹陷部包括平面部，第一连接段和第二连接段；
所述第一连接段一端与所述平面部连接，所述第一连接段另一端与所述第一连接部连接，所述第一连接段与所述平面部的连接处形成有第一弧形面；
所述第二连接段一端与所述平面部连接，所述第二连接段另一端与所述第二连接部连接，所述第二连接段与所述平面部的连接处形成有第二弧形面。
可选地，所述平面部上开设有所述第二通孔，所述平面部承载所述盖帽。
可选地，沿所述凹陷部的周向方向，所述第一盖板与所述凹陷部之间形成空隙。
可选地，所述电池盖板的厚度范围为0.1mm-0.3mm。
根据本公开第二方面，提供了一种电池。所述电池包括：电池壳体和如第一方面所述的电池盖板；
所述第一盖板与所述电池壳体焊接。
本公开的一个技术效果在于：提供一种电池盖板，电池盖板包括第一盖板、第二盖板和盖帽。第二盖板上开设有第二通孔，第二通孔作为注液孔。在通过第二通孔向电池内注入电解液之后，只需要将盖帽盖设于第二通孔，将盖帽与第二盖板连接，相对于现有技术中在通过注液孔向电池内注入电解液之后，需要将壳体与壳体盖板进行焊接，本公开实施例在通过注液孔向电池内注入电解液之后，只需要将盖帽与第二盖板连接即可，而不需要再注液后，再进行壳体与壳体盖板的焊接操作，连接面积小了很多，对电解液影响较小。
通过以下参照附图对本公开的示例性实施例的详细描述，本公开的其它特征及其优点将会变得清楚。
附图说明
构成说明书的一部分的附图描述了本公开的实施例，并且连同说明书一起用于解释本公开的原理。
图1所示为本公开一实施例的电池的内部结构示意图。
图2所示为图1所示电池的结构示意图。
图3所示为本公开又一实施例的电池的内部结构示意图。
图4所示为图3所示电池的结构示意图。
附图标记说明：
1、电池盖板；11、第一盖板；111、第一通孔；12、第二盖板；121、第二通孔；122、凹陷部；123、第一弧形面；124、第一连接部；125、第二连接部；1221、平面部；1222、第一连接段；1223、第二连接段；13、盖帽；131、第三弧形面；132、刻槽；14、绝缘件；2、电池壳体；3、电芯；31、极耳；
具体实施方式
现在将参照附图来详细描述本公开的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本公开的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术和设备可能不作详细讨论，但在适当情况下，所述技术和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
根据本公开实施例提供一种电池盖板。参照图1-图4所示，所述电池盖板1包括：第一盖板11、第二盖板12和盖帽13。
所述第一盖板11沿其厚度方向贯穿形成第一通孔111，所述第一盖板11用于与电池壳体2连接。所述第二盖板12盖设在所述第一通孔111上，所述第二盖板12与所述第一盖板11连接且所述第一盖板11与所述第二盖板12之间设置有绝缘件14。所述第二盖板12沿其厚度方向贯穿形成第二通孔121，所述第二通孔121作为注液孔。在通过所述第二通孔121完成注液的情况下，所述盖帽13盖设在所述第二通孔121上，所述盖帽13与所述第二盖板12连接。
具体地，第一盖板11上开设有第一通孔111，第一通孔111沿第一盖板11的厚度方向贯通。在电池盖板1应用到电池中，第一盖板11用于与电池壳体2连接。具体地，第一盖板11与电池壳体2连接，第一盖板11和电池壳体2围合形成腔体，腔体内收容有电芯3。
第二盖板12盖设于第一通孔111，例如第二盖板12的径向尺寸大于第一通孔111的径向尺寸，第二盖板12盖设在第一通孔111上，使得第二盖板12的一部分能够与第一盖板11连接。在第二盖板12与第一盖板11连接的情况下，第二盖板12与第一盖板11之间设置有绝缘件14，绝缘件14以隔离第二盖板12和第一盖板11，避免第二盖板12和第一盖板11直接接触造成电池短路。
第二盖板12上开设有第二通孔121，第二通孔121沿第二盖板12的厚度方向贯通。在电池盖板1应用到电池中，第二通孔121作为注液孔，第二通孔121用于注入电解液。因此在通过第二通孔121向电池内注入电解液之前，需要将第一盖板11与电池壳体2连接，再将第二盖板12盖设在第一通孔111上并且第二盖板12与第一盖板11连接。
在通过第二通孔121向电池内注入电解液之后，只需要将盖帽13盖设于第二通孔121，将盖帽13与第二盖板12连接，以实现对第二通孔121密封。
相对于现有技术中将密封塞塞进注液孔内对注液孔进行密封，本公开实施例通过盖帽13盖设在第二通孔121，避免了电池壳体内的电解液溢出现象。另一方面相对于现有技术中在通过注液孔向电池内注入电解液之后，需要将壳体与壳体盖板进行焊接(其中壳体与壳体盖板进行焊接时焊接长度较长，产生的焊接能量大，焊接能量容易影响电解液性质)，本公开实施例在通过注液孔向电池内注入电解液之后，只需要将盖帽13与第二盖板12连接即可，而不需要再注液后，再进行壳体与壳体盖板的焊接操作，连接面积小了很多，对电解液影响较小。
在一个可选的实施例中，盖帽13的材质与第二盖板12的材质相同。盖帽13和第二盖板12均选用金属材质，盖帽13和第二盖板12可以作为连接端子用于与电芯3的极耳31电连接，盖帽13或第二盖板12可以作为电极的一个引出端将电流引出。例如参照图1和图3所示，第二盖板12与极耳31电连接。
在一个可选的实施例，参照图1和图3所示，所述盖帽13为金属部件。进一步地，参照图3所示，所述盖帽13远离所述第二盖板12的表面上设置有刻槽132。
例如盖帽13为不锈钢板或者铝制板等。例如在盖帽13的材质选用不锈钢的情况下，在电池盖板1应用到电池中，电池内部压力较大的情况下，电池内部压力增大进而使得电池内部温度升高，绝缘件14在电池内部温度升高后融化，使得第二盖板12与第一盖板11之间产生空隙便于电池进行泄压。
例如在盖帽13的材质选用铝制材料的情况下，在电池盖板1应用到电池中，电池内部压力较大的情况下，因此铝制材料质轻，在铝制材料的表面上设置刻槽，电池内部压力通过刻槽使得铝制的盖帽13产生破裂，便于对电池进行泄压。
在一个可选的实施例，所述盖帽13与所述第二盖板12焊接。
具体地，由于第一盖板11用于与电池壳体2连接。第二盖板12盖设在第一盖板11的第一通孔111上，盖帽13盖设在第二通孔121上。因此第一盖板11的周长尺寸大于盖帽13的周长尺寸。
在本公开实施例在通过注液孔向电池内注入电解液之后，只需要将盖帽13与第二盖板12焊接即可，而不需要再注液后，再进行壳体与壳体盖板的焊接操作，焊接面积小了很多，产生的热量也较少，对电解液影响较小。
在一个可选的实施例，参照图1和图3所示，所述第二盖板12上形成有凹陷部122，所述凹陷部122位于所述第一通孔111内；
沿所述第二盖板12的长度方向，所述凹陷部122的第一端形成有第一连接部124，所述第一连接部124与所述第一盖板11连接；所述凹陷部122的第二端形成有第二连接部125，所述第二连接部125与所述第一盖板11连接。
具体地，第二盖板12采用一体成型方式成型。在第二盖板12成型之后能够直接在第二盖板12上形成有凹陷部122。或者通过弯折等方式在第二盖板12上形成凹陷部122。例第二盖板12的某一区域段相对于第二盖板12的其他区域段整体凹陷。
第二盖板12通过将凹陷部122位于第一通孔111内以盖设第一通孔111。
第一连接部124与凹陷部122连接，同时第一连接部124位于第一盖板11上方，第一连接部124与第一盖板11之间设置有绝缘件14。
第二连接部125与凹陷部122连接，同时第二连接部125位于第一盖板11上方，第二连接部125与第一盖板11之间有绝缘件14。
本例子在第二盖板12上形成有凹陷部122，盖帽13焊接在凹陷部122 上，盖帽13不会突出于第二盖板12的外表面，使得电池盖板1的厚度更薄，在电池盖板1应用到电池中，利于降低电池的整体高度。另一方面，在第二盖板12上形成有凹陷部122，盖帽13焊接在凹陷部122上，使得第二盖板12的凹陷部122和盖帽13均更靠近极耳31，便于第二盖板12的凹陷部122或者盖帽13与极耳31焊接。
进一步地，所述凹陷部122包括平面部1221，第一连接段1222和第二连接段1223。
所述第一连接段1222一端与所述平面部1221连接，所述第一连接段1222另一端与所述第一连接部124连接，所述第一连接段1222与所述平面部1221的连接处形成有第一弧形面123。
所述第二连接段1223一端与所述平面部1221连接，所述第二连接段1223另一端与所述第二连接部125连接，所述第二连接段1223与所述平面部1221的连接处形成有第二弧形面。
例如第一连接段1222与平面部1221通过第一弧形面123连接，第二连接段1223与平面部1221通过第二弧形面连接，避免第一连接段1222和第二连接段1223与平面部1221的连接处出现直棱直角，提高第二盖板12的结构强度。
进一步地，参照图1和图3所示，所述平面部1221上开设有所述第二通孔121，所述平面部1221承载所述盖帽13。
在第二盖板12形成有凹陷部122的情况下，凹陷部122位于第一通孔111内。盖帽13位于平面部1221上，在一定程度上能够降低电池盖板1的整体厚度。
进一步地，盖帽13设置在平面部1221上，盖帽13与平面部1221接触的表面上形成有第三弧形面131，避免盖帽13与平面部1221的连接处出现直棱直角，影响盖帽13与平面部1221的焊接强度。
在一个可选的实施例，参照图1和图3所示，沿所述凹陷部122的周向方向，所述第一盖板11与所述凹陷部122之间形成空隙。
具体地，在第二盖板12形成凹陷部122的情况下，凹陷部122位于第一通孔111内，凹陷部122的平面部1221的径向尺寸小于第一通孔111 的径向尺寸，第一盖板11与凹陷部122之间形成空隙。由于第一盖板11与凹陷部122之间形成空隙，在电池内部压力增大的情况下，便于对电池进行泄压。
例如参照图1和图3所示，第一连接段1222和第二连接段1223相对于平面部1221倾斜设置。第一连接段1222外表面、第二连接段1223外表面、和第一盖板11形成第一通孔111内表面的端面围合形成空隙。在电池内部压力增大的情况下，便于对电池进行泄压。
在一个可选的实施例，所述电池盖板1的厚度范围为0.1mm-0.3mm。在本公开实施例中，由于电池盖板1结构的设计，使得电池盖板1的厚度范围在0.1mm-0.3mm，降低了电池盖板1的厚度。在电池盖板1应用到电池中，降低了电池的整体高度。
根据本公开第二方面，提供了一种电池。所述电池包括：电池壳体2和如第一方面所述的电池盖板1。
所述第一盖板11与所述电池壳体2焊接。
例如所述电池壳体2包括侧壁，侧壁围合在电池壳体2的周向方向上，侧壁围合呈圆柱筒状或者侧壁围合呈立方体结构。所述电池壳体2至少一端形成开口，电池盖板1闭合所述开口。
在一个具体的实施例中，所述电池壳体2包括侧壁和底壁，其中侧壁和底壁一体成型。所述电池壳体2与底壁相对的一端形成开口，电池盖板1闭合所述开口。
第一盖板11与电池壳体2可以采用激光焊接或者电阻焊接连接。
在一个可选的实施例，所述电池壳体2为单层壳体。本例子降低了电池壳体的厚度，进而降低了电池的重量。电池应用到电子设备中，进而降低了电子设备的重量。
所述电池为圆柱形电池。例如所述电池可以应用到手机、手表、平板电脑、游戏机、或者遥控器等其他电子设备中。
虽然已经通过示例对本公开的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上示例仅是为了进行说明，而不是为了限制本公开的范围。本领域的技术人员应该理解，可在不脱离本公开的范围 和精神的情况下，对以上实施例进行修改。本公开的范围由所附权利要求来限定。

Claims (10)

  1. 一种电池盖板，其特征在于，包括：第一盖板、第二盖板和盖帽；
    所述第一盖板沿其厚度方向贯穿形成第一通孔，所述第一盖板用于与电池壳体连接；
    所述第二盖板盖设在所述第一通孔上，所述第二盖板与所述第一盖板连接且所述第一盖板与所述第二盖板之间设置有绝缘件；
    所述第二盖板沿其厚度方向贯穿形成第二通孔，所述第二通孔作为注液孔；
    在通过所述第二通孔完成注液的情况下，所述盖帽盖设在所述第二通孔上，所述盖帽与所述第二盖板连接。
  2. 根据权利要求1所述电池盖板，其特征在于，所述盖帽为金属部件。
  3. 根据权利要求1或2所述电池盖板，其特征在于，所述盖帽远离所述第二盖板的表面上设置有刻槽。
  4. 根据权利要求1所述电池盖板，其特征在于，所述盖帽与所述第二盖板焊接。
  5. 根据权利要求1所述电池盖板，其特征在于，所述第二盖板上形成有凹陷部，所述凹陷部位于所述第一通孔内；
    沿所述第二盖板的长度方向，所述凹陷部的第一端形成有第一连接部，所述第一连接部与所述第一盖板连接；所述凹陷部的第二端形成有第二连接部，所述第二连接部与所述第一盖板连接。
  6. 根据权利要求5所述电池盖板，其特征在于，所述凹陷部包括平面部，第一连接段和第二连接段；
    所述第一连接段一端与所述平面部连接，所述第一连接段另一端与所 述第一连接部连接，所述第一连接段与所述平面部的连接处形成有第一弧形面；
    所述第二连接段一端与所述平面部连接，所述第二连接段另一端与所述第二连接部连接，所述第二连接段与所述平面部的连接处形成有第二弧形面。
  7. 根据权利要求6所述电池盖板，其特征在于，所述平面部上开设有所述第二通孔，所述平面部承载所述盖帽。
  8. 根据权利要求5所述电池盖板，其特征在于，沿所述凹陷部的周向方向，所述第一盖板与所述凹陷部之间形成空隙。
  9. 根据权利要求1所述电池盖板，其特征在于，所述电池盖板的厚度范围为0.1mm-0.3mm。
  10. 一种电池，其特征在于，包括：电池壳体和如权利要求1-9任一项所述的电池盖板；
    所述第一盖板与所述电池壳体焊接。
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CN113809444A (zh) * 2021-09-17 2021-12-17 珠海冠宇电池股份有限公司 一种电池

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