WO2023103395A1 - 一种电池顶盖片及电池 - Google Patents

一种电池顶盖片及电池 Download PDF

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Publication number
WO2023103395A1
WO2023103395A1 PCT/CN2022/107265 CN2022107265W WO2023103395A1 WO 2023103395 A1 WO2023103395 A1 WO 2023103395A1 CN 2022107265 W CN2022107265 W CN 2022107265W WO 2023103395 A1 WO2023103395 A1 WO 2023103395A1
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WO
WIPO (PCT)
Prior art keywords
top cover
battery
cover body
liquid injection
injection hole
Prior art date
Application number
PCT/CN2022/107265
Other languages
English (en)
French (fr)
Inventor
陈贤阳
Original Assignee
湖北亿纬动力有限公司
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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 US18/548,554 priority Critical patent/US20240154283A1/en
Publication of WO2023103395A1 publication Critical patent/WO2023103395A1/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
    • H01M50/60—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
    • 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
    • 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
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • 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
    • H01M50/645—Plugs
    • 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 battery top cover sheet and a battery.
  • the top cover sheet of the battery is provided with a liquid injection hole to facilitate the injection of the electrolyte into the interior of the battery.
  • the liquid injection hole is generally sealed twice: the first seal is completed by the sealing rubber inserted into the liquid injection hole, and the second seal is completed by sealing the aluminum sheet welded on the top cover sheet.
  • most of the current liquid injection holes are cylindrical through holes, and high positioning accuracy is required when installing the sealing aluminum sheet, which makes it difficult to ensure the sealing effect, and the contact area between the top cover sheet and the sealing rubber at the liquid injection hole is small.
  • This application proposes a battery top cover sheet, which is provided with a liquid injection structure with a guiding effect, which facilitates the installation of the sealed aluminum sheet and improves the sealing effect of the liquid injection hole, and the top cover sheet and the sealing rubber
  • the contact area at the liquid injection hole is larger, and the sealing effect is better.
  • the present application also proposes a battery, the liquid injection hole of the battery has better sealing performance, which improves the practical safety of the battery.
  • the present application discloses a battery top cover sheet, which includes a top cover body, and the top cover body is provided with a liquid injection structure, a boss and a process tank, and the liquid injection structure includes a A sinking tank and a liquid injection hole that runs through the top cover body, the boss is located on the lower surface of the top cover body and is arranged around the liquid injection hole, and the process tank is arranged on the lower surface of the top cover body set on and around the boss.
  • the application also discloses a battery, which includes a casing, a battery cell and the battery top cover sheet described above, the upper end of the casing is open, the battery core is arranged in the casing, and the battery top cover A tab snaps onto the upper end of the housing to close the housing.
  • FIG. 1 is a schematic structural view of a battery top cover sheet according to an embodiment of the present application
  • FIG. 2 is a cross-sectional view of a partial structure of a battery top cover sheet according to an embodiment of the present application.
  • Top cover body 11. Injection structure; 111. Sink; 112. Injection hole; 12. Boss; 13. Process tank; 14. Fillet.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components.
  • installation or connection
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components.
  • the battery top cover sheet includes a top cover body 1, and a liquid injection structure 11, a boss 12 and a process tank 13 are arranged on the top cover body 1
  • the liquid injection structure 11 includes a sinker 111 located on the upper surface of the top cover body 1 and a liquid injection hole 112 penetrating through the top cover body 1.
  • the boss 12 is located on the lower surface of the top cover body 1 and is arranged around the liquid injection hole 112.
  • the process The groove 13 is disposed on the lower surface of the top cover body 1 and surrounds the boss 12 .
  • upper surface and lower surface are defined as follows: when the battery top cover sheet is fastened on the battery casing, the surface of the top cover body 1 away from the battery casing is the upper surface, and the upper surface is different from the upper surface. The opposite surface is the lower surface.
  • the additional process tank 13 can ensure the processing accuracy of the liquid injection structure 11 and the boss 12, thereby improving the processing accuracy of the battery top cover sheet.
  • the sinker 111 provided on the upper surface of the top cover body 1 provides a guiding structure for installing the sealing aluminum sheet, which facilitates subsequent welding of the sealing aluminum sheet and the top cover body 1 .
  • Adding the boss 12 on the lower surface of the top cover body 1 increases the thickness of the top cover body 1 at the sealing structure, thereby improving the sealing performance between the sealing rubber and the liquid injection structure 11 and improving the sealing effect.
  • the sinking tank 111 is in communication with the liquid injection hole 112. During the process of injecting the electrolyte towards the battery, the sinking tank 111 can guide the electrolyte to ensure that the electrolyte can flow into the battery through the liquid injection hole 112 stably. Inside the shell.
  • the width of the boss 12 decreases gradually in the direction away from the top cover body 1 , and the boss 12 and the top cover body 1 are integrally formed.
  • the boss 12 is formed into a tapered shape with a width gradually decreasing in the downward direction, so that the volume of the boss 12 can be reduced, thereby facilitating the connection between the top cover body 1 and other parts of the battery (such as lower plastic parts). software, etc.) installation.
  • the integral formation of the boss 12 and the top cover body 1 can simplify the structure of the entire battery top cover, facilitate the processing of the battery top cover, and reduce the manufacturing cost of the battery top cover.
  • the taper and the shape and size of the cross section of the boss 12 can be selected according to actual needs, and the relevant parameters of the boss 12 are not limited here.
  • the diameter of the liquid injection hole 112 is D
  • the thickness of the top cover body 1 is T1
  • the depth of the sinker 111 is H
  • the depth of the liquid injection hole 112 is T2; wherein: 4 *(H+T2-T1) ⁇ D ⁇ 6*(H+T2-T1). It can be understood that H+T2-T1 is just equal to the height of the boss 12 beyond the lower surface of the top cover body 1. Since the liquid injection hole 112 runs through this part, in the actual processing process, the aperture of the liquid injection hole 112 is too large. Large or too small is not convenient for processing.
  • the diameter of the liquid injection hole 112 is controlled between 4 times and 6 times the height of the boss 12 beyond the lower surface of the top cover body 1, which can facilitate liquid injection.
  • the machining of the hole 112 can also ensure the dimensional accuracy of the liquid injection hole 112 .
  • the diameter of the liquid injection hole 112 can also be selected according to actual needs.
  • the shape of the liquid injection hole 112 is not necessarily a circular hole, and may also be a polygonal hole or an oval hole or other shapes.
  • the thickness of the top cover body 1 is T1
  • the depth of the sinker 111 is H
  • the depth of the liquid injection hole 112 is T2 , wherein: T1 ⁇ T2 ⁇ H.
  • the thickness of the top cover body 1 is greater than the depth of the liquid injection hole 112, which can ensure the strength of the top cover body 1 at the position where the liquid injection hole 112 is opened, and prevent the top cover body 1 from being easily damaged at the position where the liquid injection hole 112 is opened. phenomenon occurs.
  • the depth of the liquid injection hole 112 is greater than the depth of the sinker 111 to ensure normal and fast liquid injection, and reduce the accumulation of electrolyte in the sinker 111 .
  • the diameter of the sinker 111 gradually decreases in a downward direction.
  • the sinker groove 111 is formed as a tapered groove, so as to facilitate the positioning of the sealing aluminum sheet and the sealing effect of the sealing aluminum sheet on the liquid injection hole 112 .
  • the sinking groove 111 is a tapered groove, and the taper of the sinking groove 111 is 110°-111°. It can be understood that the large taper of the sinker groove 111 will increase the processing difficulty and reduce the positioning and sealing effect, and the smaller taper of the sinker groove 111 will increase the difficulty of installing the sealing aluminum sheet.
  • the sinker groove 111 will The taper is set at 110° to 111°, which not only facilitates the processing of the sinker 111, but also facilitates the installation of the sealing aluminum sheet, and improves the positioning and sealing effect.
  • the shape and size of the sinker 111 can be selected according to actual needs, and are not limited to the above limitations.
  • rounded corners 14 are provided at the connection between the sinker 111 and the liquid injection hole 112 . It can be understood that the additional rounded corners 14 can improve the installation accuracy of the sealing rubber and the sealing aluminum sheet, and can also reduce burrs generated during stamping of the top cover body 1 .
  • the radius of the fillet 14 is 0.1 mm-0.5 mm. If the radius of the fillet 14 is too small, it is inconvenient to process, and if it is too large, the sealing effect may be reduced. In this embodiment, the radius of the fillet 14 is controlled between 0.1mm-0.5mm, which can not only facilitate processing, but also improve the sealing effect. Sealing effect. Of course, in other embodiments of the present application, the radius of the fillet 14 can be selected according to actual needs, and is not limited to 0.1 mm-0.5 mm in this embodiment.
  • the depth of the process tank 13 is 0.1 mm-0.5 mm. It can be understood that if the depth of the process tank 13 is too large, the strength of the top cover body 1 will be reduced, and if the depth is too small, the processing difficulty will be increased and the processing accuracy will be reduced.
  • the depth of the process tank 13 is controlled at 0.1 mm-0.5 mm. mm, can not only ensure the depth of the top cover body 1, but also reduce the processing difficulty and ensure the processing accuracy, thereby ensuring the processing accuracy of the boss 12 and the sinker groove 111.
  • the depth of the process tank 13 can also be selected according to actual needs, and is not limited to the above limitation.
  • a battery top cover sheet according to a specific embodiment of the present application will be described below with reference to FIGS. 1-2 .
  • the battery top cover sheet includes a top cover body 1, and the top cover body 1 is provided with a liquid injection structure 11, a boss 12, and a process tank 13.
  • the liquid injection hole 112 of the top cover body 1, the boss 12 is located on the lower surface of the top cover body 1 and is arranged around the liquid injection hole 112, and the process tank 13 is arranged on the lower surface of the top cover body 1 and is arranged around the boss 12.
  • the width of the boss 12 gradually decreases in the downward direction, and the diameter of the sinker 111 gradually decreases in the downward direction.
  • the diameter of the liquid injection hole 112 is D
  • the thickness of the top cover body 1 is T1
  • the depth of the sinker 111 is H
  • the depth of the liquid injection hole 112 is T2
  • D 5*(H+T2 -T1)
  • the taper of sinker 111 is 110.5°.
  • the junction of sinking tank 111 and liquid injection hole 112 is provided with rounded corners 14, the radius of rounded corners 14 is 0.3 mm, and the depth of process tank 13 is 0.3 mm.
  • the additional process tank 13 can ensure the processing accuracy of the liquid injection structure 11 and the boss 12, thereby improving the processing accuracy of the battery top cover sheet;
  • the sinking groove 111 added on the upper surface of the top cover body 1 provides a guiding structure for installing the sealing aluminum sheet, which facilitates the subsequent welding of the sealing aluminum sheet and the top cover body 1;
  • Adding the boss 12 on the lower surface of the top cover body 1 increases the thickness of the top cover body 1 at the sealing structure, thereby improving the sealing performance of the sealing rubber and the liquid injection structure 11, and improving the sealing effect;
  • rounded corners 14 are provided at the connection between the sinker tank 111 and the liquid injection hole 112, which improves the installation accuracy of the sealing rubber and the sealing aluminum sheet, and can also reduce burrs during stamping of the top cover body 1.
  • the application also discloses a battery, including a casing, a battery cell, and the aforementioned battery top cover sheet, the upper end of the casing is open, the battery cell is arranged in the casing, and the battery top cover sheet is fastened on the upper end of the casing to close the battery. case.
  • the sealing performance of the liquid injection hole 112 of the battery is better, which improves the practical safety of the battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Filling, Topping-Up Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请公开了一种电池顶盖片及电池，该电池顶盖片包括顶盖本体(1)，顶盖本体(1)上设有注液结构(11)、凸台(12)以及工艺槽(13)，注液结构(11)包括位于顶盖本体(1)的上表面的沉槽(111)以及贯穿顶盖本体(1)的注液孔(112)，凸台(12)位于顶盖本体(1)的下表面且环绕注液孔(112)设置，工艺槽(13)设在顶盖本体(1)的下表面上且环绕凸台(12)设置。

Description

一种电池顶盖片及电池
本申请要求在2021年12月7日提交中国专利局、申请号为202123057247.1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，例如涉及一种电池顶盖片及电池。
背景技术
电池的顶盖片作为电池组成部分之一，其上设有注液孔，以便于电解液注入到电池的内部。当电池注液完成后，一般经过两次注液孔密封：第一次密封由插入注液孔内的密封橡胶完成，第二次密封由焊接在顶盖片上密封铝片完成。但是目前的注液孔多为圆柱状通孔，安装密封铝片时需要较高的定位精度，使得密封效果难于保证，并且顶盖片与密封橡胶在注液孔处的接触面积较小。
发明内容
本申请提出一种电池顶盖片，该电池顶盖片上设有具有导向作用的注液结构，方便密封铝片的安装，提升了注液孔的密封效果，且该顶盖片与密封橡胶在注液孔处的接触面积较大，密封效果较好。
本申请还提出一种电池，该电池的注液孔的密封性能较好，提升了电池的实用安全性。
本申请的技术方案如下：
本申请公开了一种电池顶盖片，包括顶盖本体，所述顶盖本体上设有注液结构、凸台以及工艺槽，所述注液结构包括位于所述顶盖本体的上表面的沉槽以及贯穿所述顶盖本体的注液孔，所述凸台位于所述顶盖本体的下表面且环绕所述注液孔设置，所述工艺槽设在所述顶盖本体的下表面上且环绕所述凸台设置。
本申请还公开了一种电池，包括壳体、电芯和前文所述的电池顶盖片，所述壳体的上端敞开设置，所述电芯设在所述壳体内，所述电池顶盖片扣合在所述壳体的上端以封闭所述壳体。
附图说明
图1是本申请实施例的电池顶盖片的结构示意图；
图2是本申请实施例的电池顶盖片的局部结构剖面图。
附图标记：
1、顶盖本体；11、注液结构；111、沉槽；112、注液孔；12、凸台；13、工艺槽；14、圆角。
具体实施方式
，下面结合附图并通过具体实施方式来说明本申请的技术方案。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，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，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征，用于区别描述特征，无顺序之分，无轻重之分。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；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。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。
下面参考图1-图2描述本申请实施例的电池顶盖片的具体结构。
本申请公开了一种电池顶盖片，如图1-图2所示，该电池顶盖片包括顶盖本体1，顶盖本体1上设有注液结构11、凸台12以及工艺槽13，注液结构11包括位于顶盖本体1的上表面的沉槽111以及贯穿顶盖本体1的注液孔112，凸台12位于顶盖本体1的下表面且环绕注液孔112设置，工艺槽13设在顶盖本体1的下表面上且环绕凸台12设置。
需要说明的是，前文所述的上表面和下表面的定义如下：当电池顶盖片扣合在电池的壳体上时，顶盖本体1远离电池的壳体的表面为上表面，与上表面相对设置的为下表面。
可以理解的是，增设的工艺槽13能够保证注液结构11以及凸台12的加工精度，从而提升电池顶盖片的加工精度。设在顶盖本体1的上表面的沉槽111为安装密封铝片提供了导向结构，方便了后续的密封铝片与顶盖本体1的焊接。增设在顶盖本体1下表面上的凸台12，增加了顶盖本体1在密封结构处的厚度，从而提升了密封橡胶与注液结构11的密封性，提升了密封效果。此外，沉槽111与注液孔112相连通，在朝向电池注入电解液的过程中，沉槽111能够起到导向电解液的作用，以保证电解液能够稳定地经过注液孔112流入电池的壳体内部。
在一些实施例中，如图2所示，凸台12的宽度在远离顶盖本体1的方向上逐渐减小，且凸台12与顶盖本体1为一体成型件。可以理解的是，凸台12形成为在向下的方向上宽度逐渐减小的锥形，如此设置能够减小凸台12的体积，从而方便顶盖本体1与电池的其他部件(例如下塑胶件等)的安装。此外，凸台12和顶盖本体1一体成型能够简化整个电池顶盖片的结构，方便电池顶盖片加工，降低电池顶盖片的制造成本。
当然，这里需要补充说明的是，在本实施例中，凸台12的锥度和横截面的形状及尺寸可以根据实际需要选择，在此并不对凸台12的相关参数做出限定。
在一些实施例中，如图2所示，注液孔112的直径为D，顶盖本体1的厚 度为T1，沉槽111的深度为H，注液孔112的深度为T2；其中：4*(H+T2-T1)＜D≤6*(H+T2-T1)。可以理解的是，H+T2-T1正好等于凸台12超出顶盖本体1的下表面的高度，由于注液孔112是贯穿这个部分的，在实际加工过程中，注液孔112的孔径过大或者过小都不方便加工，在本实施例中，将注液孔112的直径控制在凸台12超出顶盖本体1的下表面的高度的4倍到6倍之间，能够方便注液孔112的加工并且能够保证注液孔112的尺寸精度。
当然，这里需要额外说明的是，在本申请的其他实施例中，注液孔112的直径还可以根据实际需要选择。此外，注液孔112的形状也不一定为圆孔，还可以是多边形孔或者椭圆形孔等其他形状。
在一些实施例中，如图2所示，顶盖本体1的厚度为T1，沉槽111的深度为H，注液孔112的深度为T2，其中：T1≥T2≥H。可以理解的是，顶盖本体1的厚度大于注液孔112的深度能够确保顶盖本体1在开设注液孔112处的强度，避免顶盖本体1容易在开设注液孔112的位置破损的现象发生。注液孔112的深度大于沉槽111的深度能够确保注液正常且快速的进行，降低沉槽111内积累电解液的现象发生。
在一些实施例中，如图2所示，沉槽111的直径在向下的方向上逐渐减小。可以理解的是，沉槽111形成为锥形槽，从而方便密封铝片的定位以及密封铝片对注液孔112的密封效果。
在一些具体的实施例中，如图2所示，沉槽111为锥形槽，沉槽111的锥度为110°-111°。可以理解的是，沉槽111的锥度过大会提升加工难度，并且降低定位以及密封效果，沉槽111的锥度较小会提升密封铝片的安装难度，在本实施例中，将沉槽111的锥度设置为110°至111°，既能够方便沉槽111的加工，还能够方便密封铝片的安装，提升定位以及密封效果。
当然，在本申请的其他实施例中，沉槽111的形状以及尺寸均可以根据实际需要选择，并不限于上述限定。
在一些实施例中，如图2所示，沉槽111与注液孔112的连接处设有圆角 14。可以理解的是，增设的圆角14可以提高密封橡胶、密封铝片安装准确率，也可以减少顶盖本体1冲压制作时产生毛刺。
在一些具体的实施例中，如图2所示，圆角14的半径为0.1mm-0.5mm。圆角14的半径过小不方便加工，过大又有可能降低密封效果，在本实施例中，将圆角14的半径控制在0.1mm-0.5mm之间，既能够方便加工，又能够提升密封效果。当然，在本申请的其他实施例中，圆角14的半径可以根据实际需要选择，并不限于本实施例的0.1mm-0.5mm。
在一些实施例中，如图2所示，工艺槽13的深度为0.1mm-0.5mm。可以理解的是，工艺槽13的深度过大会降低顶盖本体1的强度，深度过小会提升加工难度并且降低加工精度，在本实施例中，将工艺槽13的深度控制在0.1mm-0.5mm之间，既能够保证顶盖本体1的深度，还能够降低加工难度，确保加工精度，从而保证凸台12以及沉槽111的加工精度。当然，在本申请的其他实施例中，工艺槽13的深度还可以根据实际需要选择，并不限于上述限定。
实施例：
下面参考图1-图2描述本申请一个具体实施例的电池顶盖片。
该电池顶盖片包括顶盖本体1，顶盖本体1上设有注液结构11、凸台12以及工艺槽13，注液结构11包括位于顶盖本体1的上表面的沉槽111以及贯穿顶盖本体1的注液孔112，凸台12位于顶盖本体1的下表面且环绕注液孔112设置，工艺槽13设在顶盖本体1的下表面上且环绕凸台12设置。凸台12的宽度在向下的方向上逐渐减小，沉槽111的直径在向下的方向上逐渐减小。注液孔112的直径为D，顶盖本体1的厚度为T1，沉槽111的深度为H，注液孔112的深度为T2；T1≥T2≥H，且D＝5*(H+T2-T1)，沉槽111的锥度为110.5°。沉槽111与注液孔112的连接处设有圆角14，圆角14的半径为0.3mm，工艺槽13的深度为0.3mm。
本实施例的电池顶盖片的特点如下：
第一：增设的工艺槽13能够保证注液结构11以及凸台12的加工精度，从 而提升电池顶盖片的加工精度；
第二、增设在顶盖本体1的上表面的沉槽111为安装密封铝片提供了导向结构，方便了后续的密封铝片与顶盖本体1的焊接；
第三：增设在顶盖本体1的下表面的凸台12，增加了顶盖本体1在密封结构处的厚度，从而提升了密封橡胶与注液结构11的密封性，提升了密封效果；
第四：沉槽111与注液孔112的连接处设有圆角14，提高了密封橡胶、密封铝片安装准确率，也可以减少顶盖本体1冲压制作时产生毛刺。
本申请还公开了一种电池，包括壳体、电芯和前文的电池顶盖片，壳体的上端敞开设置，电芯设在壳体内，电池顶盖片扣合在壳体的上端以封闭壳体。
本申请的电池，由于具有前文所述的电池顶盖片，该电池的注液孔112的密封性能较好，提升了电池的实用安全性。
在本说明书的描述中，参考术语“有些实施例”、“其他实施例”、等的描述意指结合该实施例或示例描述的具体特征、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。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。

Claims (18)

  1. 一种电池顶盖片，包括顶盖本体(1)，所述顶盖本体(1)上设有注液结构(11)、凸台(12)以及工艺槽(13)，所述注液结构(11)包括位于所述顶盖本体(1)的上表面的沉槽(111)以及贯穿所述顶盖本体(1)的注液孔(112)，所述凸台(12)位于所述顶盖本体(1)的下表面且环绕所述注液孔(112)设置，所述工艺槽(13)设在所述顶盖本体(1)的下表面上且环绕所述凸台(12)设置。
  2. 根据权利要求1所述的电池顶盖片，其中，所述凸台(12)的宽度在远离所述顶盖本体(1)的方向上逐渐减小，且所述凸台(12)与所述顶盖本体(1)为一体成型件。
  3. 根据权利要求1所述的电池顶盖片，其中，所述注液孔(112)的直径为D，所述顶盖本体(1)的厚度为T1，所述沉槽(111)的深度为H，所述注液孔(112)的深度为T2；其中：4*(H+T2-T1)＜D≤6*(H+T2-T1)。
  4. 根据权利要求1所述的电池顶盖片，其中，所述顶盖本体(1)的厚度为T1，所述沉槽(111)的深度为H，所述注液孔(112)的深度为T2，其中：T1≥T2≥H。
  5. 根据权利要求1所述的电池顶盖片，其中，所述沉槽(111)的直径在向下的方向上逐渐减小。
  6. 根据权利要求5所述的电池顶盖片，其中，所述沉槽(111)为锥形槽，所述沉槽(111)的锥度为110°-111°。
  7. 根据权利要求1所述的电池顶盖片，其中，所述沉槽(111)与所述注液孔(112)的连接处设有圆角(14)。
  8. 根据权利要求7所述的电池顶盖片，其中，所述圆角(14)的半径为0.1mm-0.5mm。
  9. 根据权利要求1所述的电池顶盖片，其中，所述工艺槽(13)的深度为0.1mm-0.5mm。
  10. 一种电池，包括壳体、电芯和电池顶盖片，所述壳体的上端敞开设置，所述电芯设在所述壳体内，所述电池顶盖片扣合在所述壳体的上端以封闭所述壳体；
    其中，所述电池顶盖片包括顶盖本体(1)，所述顶盖本体(1)上设有注液结构(11)、凸台(12)以及工艺槽(13)，所述注液结构(11)包括位于所述顶盖本体(1)的上表面的沉槽(111)以及贯穿所述顶盖本体(1)的注液孔(112)，所述凸台(12)位于所述顶盖本体(1)的下表面且环绕所述注液孔(112)设置，所述工艺槽(13)设在所述顶盖本体(1)的下表面上且环绕所述凸台(12)设置。
  11. 根据权利要求10所述的电池，其中，所述凸台(12)的宽度在远离所述顶盖本体(1)的方向上逐渐减小，且所述凸台(12)与所述顶盖本体(1)为一体成型件。
  12. 根据权利要求10所述的电池，其中，所述注液孔(112)的直径为D，所述顶盖本体(1)的厚度为T1，所述沉槽(111)的深度为H，所述注液孔(112)的深度为T2；其中：4*(H+T2-T1)＜D≤6*(H+T2-T1)。
  13. 根据权利要求10所述的电池，其中，所述顶盖本体(1)的厚度为T1，所述沉槽(111)的深度为H，所述注液孔(112)的深度为T2，其中：T1≥T2≥H。
  14. 根据权利要求10所述的电池，其中，所述沉槽(111)的直径在向下的方向上逐渐减小。
  15. 根据权利要求14所述的电池，其中，所述沉槽(111)为锥形槽，所述沉槽(111)的锥度为110°-111°。
  16. 根据权利要求10所述的电池，其中，所述沉槽(111)与所述注液孔(112)的连接处设有圆角(14)。
  17. 根据权利要求16所述的电池，其中，所述圆角(14)的半径为0.1mm-0.5mm。
  18. 根据权利要求10所述的电池，其中，所述工艺槽(13)的深度为0.1mm-0.5mm。
PCT/CN2022/107265 2021-12-07 2022-07-22 一种电池顶盖片及电池 WO2023103395A1 (zh)

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