WO2021258452A1 - 一种纽扣电池 - Google Patents

一种纽扣电池 Download PDF

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Publication number
WO2021258452A1
WO2021258452A1 PCT/CN2020/102991 CN2020102991W WO2021258452A1 WO 2021258452 A1 WO2021258452 A1 WO 2021258452A1 CN 2020102991 W CN2020102991 W CN 2020102991W WO 2021258452 A1 WO2021258452 A1 WO 2021258452A1
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WO
WIPO (PCT)
Prior art keywords
shell
housing
button battery
button
battery according
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PCT/CN2020/102991
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English (en)
French (fr)
Inventor
张健
何家勇
徐斌
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技（南京）有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技（南京）有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2021258452A1 publication Critical patent/WO2021258452A1/zh

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Classifications

    • 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
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • 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 invention belongs to the technical field of batteries, and particularly relates to a button battery.
  • the basic structure of a traditional button battery includes a metal upper shell, a metal lower shell, and a sealing ring that insulates and seals the metal upper shell and the metal lower shell.
  • the metal upper shell and the metal lower shell are sealed by a mechanical seal. Since the sealing ring is small and thin, and is provided with an inner folding edge to block the upper shell or the lower shell opening for insulation, there are problems in the assembly process that the assembly is difficult, the yield rate is low, and the damage is easy.
  • the purpose of the present invention is to provide a button battery, which aims to solve the problems of high assembly difficulty, low yield, and easy damage of the existing button battery.
  • a button battery comprising an upper shell and a lower shell that cooperate with each other to form an accommodating cavity, and a battery body accommodated in the accommodating cavity, and the lower shell is electrically connected to the battery body
  • the upper case includes a first case and a second case that are electrically isolated, and the first case is electrically connected to the battery body to form
  • the second casing is welded and fixed to the lower casing, and the upper casing is an integrally formed structure.
  • the lower shell includes a side wall surrounding the accommodating cavity and a flange portion bent from the top of the side wall to a side away from the accommodating cavity. Said folding part is welded and fixed.
  • first housing is made of conductive material
  • second housing is made of non-conductive material
  • first housing and the second housing are both made of conductive materials, and the first housing and the second housing are spaced apart, and the upper housing further includes a connection between the first housing and the second housing.
  • the second housing includes a connecting portion connected to the third housing and arranged in a horizontal direction, and an extension portion bent and extended downward from an end of the connecting portion away from the third housing, so The edge-folding portion is located between the side wall and the extension portion, and the edge-folding portion is fixed to the extension portion by welding.
  • the flange portion is a ring-shaped structure circumferentially arranged along the side wall.
  • the upper shell is formed by integral injection molding.
  • the third housing is provided with a groove corresponding to the connecting portion, and the connecting portion is inserted into the groove.
  • the beneficial effect of the present invention is that the upper shell and the lower shell of the button battery of the present invention are fixed by welding, so that the upper shell and the lower shell can be sealed to isolate the air and moisture inside and outside the battery, and the upper shell
  • the first shell and the second shell are electrically isolated from each other, and play the role of isolating the positive and negative electrodes of the battery.
  • the invention avoids the use of the sealing ring in the related art, thereby reducing the difficulty of assembly, improving the yield, and not easily damaging the product.
  • FIG. 1 is a schematic cross-sectional view of the button battery provided by the first embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the button battery provided by the second embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the structure of the upper shell and the lower shell in FIG. 2.
  • FIG. 1 is a button battery provided by the first embodiment of the present invention.
  • the lower case 1 is electrically connected to the battery body 3 to form one of the positive electrode or the negative electrode of the button battery
  • the upper case 2 includes a first case 21 and a second case 23 that are electrically isolated, and the first case 21 is connected to the battery
  • the body 3 is electrically connected to form the other of the positive electrode or the negative electrode of the button battery
  • the second housing 23 is welded and fixed to the lower housing 1
  • the upper housing 2 is an integral structure.
  • the upper shell 2 and the lower shell 1 of the button battery of this embodiment are fixed by welding, the upper shell 2 and the lower shell 1 can be sealed to isolate the air and moisture inside and outside the battery, and the upper shell 2
  • the first housing 21 and the second housing 23 are electrically isolated from each other, and play a role in isolating the positive and negative electrodes of the battery.
  • This embodiment avoids the use of the sealing ring in the related art, thereby reducing the difficulty of assembly, improving the yield, and not easily damaging the product.
  • the lower shell 1 includes a side wall 11 surrounding the accommodating cavity 6 and a folded edge 12 bent from the top of the side wall 11 to a side away from the accommodating cavity 6, a second housing 23 and the folded edge 12 Welding and fixing.
  • the lower shell 1 is welded and fixed to the second shell 23 by the flange portion 12, which not only enhances the firmness of the welding and further enhances the sealing effect, but also avoids the high heat generated during the welding process from damaging the battery body 3.
  • the flange portion 12 is an annular structure arranged along the circumferential direction of the side wall 11, and the annular flange portion 12 arranged in the circumferential direction can increase the contact area with the second housing 23, thereby further strengthening the flange portion 12 and the second housing 23.
  • the welding stability of the second shell 23 ensures the sealing effect.
  • the first housing 21 is made of conductive material
  • the second housing 23 is made of non-conductive material
  • the first housing 21 and the second housing 23 are electrically isolated.
  • the first shell 21 is made of metal materials, such as steel sheets, iron sheets, copper sheets, etc.
  • the second shell 23 is made of plastic materials, or other insulating materials such as insulating rubber products, ceramic products, and the like.
  • the upper shell 2 is formed by integral injection molding, thereby enhancing the structural stability of the upper shell 2.
  • the first housing 21 is electrically connected to the battery body 3 to form the positive electrode of the button battery
  • the lower housing 1 is electrically connected to the battery body 3 to form the negative electrode of the button battery.
  • the battery body 3 includes a positive electrode tab 4 disposed between the battery body 3 and the upper case 2 and a negative electrode tab 5 disposed between the battery body 3 and the lower case 1.
  • One end of the positive electrode tab 4 is connected to the battery body On the top surface of 3, the other end of the positive electrode tab 4 is connected to the first housing 21, one end of the negative electrode tab 5 is connected to the side surface of the battery body 3, and the other end of the negative electrode tab 5 is bent and extended to the bottom surface of the battery body 3 and is connected to the lower housing 1.
  • the bottom wall is connected.
  • the battery body 3 may have a wound composite structure formed by winding a positive electrode sheet and a negative electrode sheet, or a laminated structure in which a positive electrode sheet and a negative electrode sheet are laminated.
  • FIG. 2 and FIG. 3 are schematic diagrams of the button battery provided by the second embodiment of the present invention.
  • the structure of the button battery differs from the first embodiment mainly in that the first housing 21 and the second housing 23 are both made of conductive materials, and the first housing 21 and the second housing 23 are separated from each other.
  • the upper shell 2 further includes a third shell 22 connecting the first shell 21 and the second shell 23, and the third shell 22 is made of insulating material. Since the third housing 22 is arranged between the first housing 21 and the second housing 23, it can function to isolate the first housing 21 and the second housing 23, that is, to isolate the positive and negative electrodes of the battery.
  • the first housing 21 and the second housing 23 are both steel sheets, and the first housing 21, the second housing 23, and the third housing 22 are integrally molded by injection molding.
  • the first housing 21 and the second housing 23 can also be made of other metal materials such as iron sheets and copper sheets, and the third housing 22 can also be made of other insulating materials such as insulating rubber products, ceramic products, etc. .
  • the second housing 23 includes a connecting portion 231 connected to the third housing 22 and arranged in a horizontal direction, and an extension portion 232 bent and extended downward from an end of the connecting portion 231 away from the third housing 22.
  • the size of the upper shell 2 is greater than the size of the lower shell 1, so when the upper shell 2 is mated with the lower shell 1, the connecting portion 231 extends horizontally beyond the edge of the lower shell 1, and the flange portion 12 is located between the side wall 11 and the extension portion 232 In between, the flange portion 12 and the extension portion 232 are welded and fixed.
  • the third housing 22 is provided with a groove 221 corresponding to the connecting portion 231, and the connecting portion 231 is inserted into the groove 221, so that the connection between the connecting portion 231 and the third housing 22 is closer.
  • the upper shell 2 and the lower shell 1 are fixed by welding, so that the upper shell 2 and the lower shell 1 can be sealed to isolate the air inside and outside the battery from Moisture, and the first shell 21 and the second shell 23 of the upper shell 2 are electrically isolated from each other, which plays the role of isolating the positive and negative electrodes of the battery.
  • the invention avoids the use of the sealing ring in the related art, thereby reducing the difficulty of assembly, improving the yield, and not easily damaging the product.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本发明提供了一种纽扣电池，包括相互配合以形成容置腔的上壳和下壳以及收容于所述容置腔内的电池体，所述下壳与所述电池体电连接以形成为所述纽扣电池的正极或负极中的一者，所述上壳包括电隔离的第一壳体和第二壳体，所述第一壳体与所述电池体电连接以形成为所述纽扣电池的正极或负极中的另一者，所述第二壳体与所述下壳焊接固定，所述上壳为一体成型结构。本发明避免了相关技术中密封圈的使用，从而降低了装配难度，提高了良率，并且不易损坏产品。

Description

一种纽扣电池 技术领域
本发明属于电池技术领域，尤其涉及一种纽扣电池。
 背景技术
传统的纽扣电池的基本结构包括金属上壳、金属下壳以及使金属上壳和金属下壳绝缘并起密封作用的密封圈，金属上壳和金属下壳之间通过机械封口的方式进行密封。由于密封圈小且薄，且设有内折边卡在上壳或者下壳口起绝缘作用，因此在装配的过程中存在装配难度大，良率低，易损坏的问题。
 技术问题
本发明的目的在于提供一种纽扣电池，旨在解决现有的纽扣电池装配难度大，良率低，易损坏的问题。
 技术解决方案
本发明的技术方案如下：一种纽扣电池，包括相互配合以形成容置腔的上壳和下壳以及收容于所述容置腔内的电池体，所述下壳与所述电池体电连接以形成为所述纽扣电池的正极或负极中的一者，所述上壳包括电隔离的第一壳体和第二壳体，所述第一壳体与所述电池体电连接以形成为所述纽扣电池的正极或负极中的另一者，所述第二壳体与所述下壳焊接固定，所述上壳为一体成型结构。
进一步地，所述下壳包括围设成所述容置腔的侧壁以及自所述侧壁顶部向远离所述容置腔一侧弯折的折边部，所述第二壳体与所述折边部焊接固定。
进一步地，所述第一壳体由导电材料制成，所述第二壳体由非导电材料制成。
进一步地，所述第一壳体和所述第二壳体均由导电材料制成，且所述第一壳体和所述第二壳体间隔设置，所述上壳还包括连接所述第一壳体和所述第二壳体的第三壳体，所述第三壳体由绝缘材料制成。
进一步地，所述第二壳体包括与所述第三壳体连接且沿水平方向设置的连接部以及自所述连接部远离所述第三壳体一端向下弯折延伸的延伸部，所述折边部位于所述侧壁和所述延伸部之间，所述折边部与所述延伸部焊接固定。
进一步地，所述折边部为沿所述侧壁周向环绕设置的环形结构。
进一步地，所述上壳通过一体注塑成型。
进一步地，所述第三壳体对应所述连接部开设有凹槽，所述连接部插入所述凹槽中。
 有益效果
本发明的有益效果在于：本发明的纽扣电池，其上壳与下壳通过焊接的方式固定，从而能够对上壳和下壳之间进行密封，隔绝电池内外部的空气与水分，而且上壳的第一壳体和第二壳体相互电隔离，起到了隔绝电池正负极的作用。本发明避免了相关技术中密封圈的使用，从而降低了装配难度，提高了良率，并且不易损坏产品。
 附图说明
图1是本发明第一实施例提供的纽扣电池的剖视结构示意图；
图2是本发明第二实施例提供的纽扣电池的剖视结构示意图；
图3是图2中的上壳和下壳的结构示意图。
 本发明的实施方式
下面结合附图和实施方式对本发明作进一步说明。
实施例：
请参阅图1，图1是本发明第一实施例提供的一种纽扣电池，包括相互配合以形成容置腔6的上壳2和下壳1以及收容于容置腔6内的电池体3，下壳1与电池体3电连接以形成为纽扣电池的正极或负极中的一者，上壳2包括电隔离的第一壳体21和第二壳体23，第一壳体21与电池体3电连接以形成为纽扣电池的正极或负极中的另一者，第二壳体23与下壳1焊接固定，上壳2为一体成型结构。
由于本实施例的纽扣电池的上壳2与下壳1通过焊接的方式固定，从而能够对上壳2和下壳1之间进行密封，隔绝电池内外部的空气与水分，并且上壳2的第一壳体21和第二壳体23相互电隔离，起到了隔绝电池正负极的作用。本实施例避免了相关技术中密封圈的使用，从而降低了装配难度，提高了良率，并且不易损坏产品。
具体的，下壳1包括围设成容置腔6的侧壁11以及自侧壁11顶部向远离容置腔6一侧弯折的折边部12，第二壳体23与折边部12焊接固定。下壳1通过折边部12与第二壳体23焊接固定，不仅可以增强焊接的牢固性，进一步增强密封效果，而且可以避免焊接过程中产生的高热量破坏电池体3。优选的，折边部12为沿侧壁11周向设置的环形结构，周向设置的环形折边部12可增大与第二壳体23的接触面积，从而进一步增强折边部12与第二壳体23焊接的稳固性，保证密封效果。
本实施例中，第一壳体21由导电材料制成，第二壳体23由非导电材料制成，第一壳体21和第二壳体23之间形成电隔离。第一壳体21为金属材料，如钢片、铁片、铜片等，第二壳体23为塑料材料，也可以为绝缘胶制品、陶瓷制品等其他绝缘材料。优选的，上壳2通过一体注塑成型，从而增强了上壳2的结构稳定性。
本实施例中，第一壳体21与电池体3电连接以形成为纽扣电池的正极，下壳1与电池体3电连接以形成为纽扣电池的负极。具体的，电池体3包括设置在电池体3和上壳2之间的正极极耳4和设置在电池体3和下壳1之间的负极极耳5，正极极耳4一端连接在电池体3的顶面，正极极耳4另一端连接第一壳体21，负极极耳5一端连接电池体3的侧面，负极极耳5另一端弯折延伸至电池体3的底面并与下壳1的底壁连接。电池体3可以为由正极片和负极片卷绕形成的卷绕复合体结构，也可以为正极片和负极片叠层设置的叠层结构。
请参阅图2和图3，图2和图3为本发明第二实施例提供的纽扣电池的结构示意图。
在本实施中，纽扣电池的结构与第一实施例的区别主要在于，第一壳体21和第二壳体23均由导电材料制成，且第一壳体21和第二壳体23间隔设置，上壳2还包括连接第一壳体21和第二壳体23的第三壳体22，第三壳体22由绝缘材料制成。由于第三壳体22设置在第一壳体21和第二壳体23之间，能够起到隔离第一壳体21和第二壳体23的作用，即隔绝了电池的正负极。可选的，第一壳体21和第二壳体23均为钢片，第一壳体21、第二壳体23以及第三壳体22通过一体注塑成型。在其他可能的实施方式中，第一壳体21和第二壳体23也可以为铁片、铜片等其他金属材料，第三壳体22也可以为绝缘胶制品、陶瓷制品等其他绝缘材料。
另外，请参阅图3，第二壳体23包括与第三壳体22连接且沿水平方向设置的连接部231以及自连接部231远离第三壳体22一端向下弯折延伸的延伸部232，上壳2的尺寸大于下壳1的尺寸，因此当上壳2与下壳1配合时，连接部231水平延伸超出下壳1的边缘，折边部12位于侧壁11和延伸部232之间，折边部12与延伸部232焊接固定。第三壳体22对应连接部231开设有凹槽221，连接部231插入凹槽221中，使得连接部231和第三壳体22的连接更为紧密。
综上所述，本发明实施例提供的纽扣电池，其上壳2与下壳1通过焊接的方式固定，从而能够对上壳2和下壳1之间进行密封，隔绝电池内外部的空气与水分，而且上壳2的第一壳体21和第二壳体23相互电隔离，起到了隔绝电池正负极的作用。本发明避免了相关技术中密封圈的使用，从而降低了装配难度，提高了良率，并且不易损坏产品。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (8)

  1. 一种纽扣电池，包括相互配合以形成容置腔的上壳和下壳以及收容于所述容置腔内的电池体，其特征在于：所述下壳与所述电池体电连接以形成为所述纽扣电池的正极或负极中的一者，所述上壳包括电隔离的第一壳体和第二壳体，所述第一壳体与所述电池体电连接以形成为所述纽扣电池的正极或负极中的另一者，所述第二壳体与所述下壳焊接固定，所述上壳为一体成型结构。
  2. 根据权利要求1所述的纽扣电池，其特征在于：所述下壳包括围设成所述容置腔的侧壁以及自所述侧壁顶部向远离所述容置腔一侧弯折的折边部，所述第二壳体与所述折边部焊接固定。
  3. 根据权利要求1所述的纽扣电池，其特征在于：所述第一壳体由导电材料制成，所述第二壳体由非导电材料制成。
  4. 根据权利要求1所述的纽扣电池，其特征在于：所述第一壳体和所述第二壳体均由导电材料制成，且所述第一壳体和所述第二壳体间隔设置，所述上壳还包括连接所述第一壳体和所述第二壳体的第三壳体，所述第三壳体由绝缘材料制成。
  5. 根据权利要求4所述的纽扣电池，其特征在于，所述第二壳体包括与所述第三壳体连接且沿水平方向设置的连接部以及自所述连接部远离所述第三壳体一端向下弯折延伸的延伸部，所述折边部位于所述侧壁和所述延伸部之间，所述折边部与所述延伸部焊接固定。
  6. 根据权利要求2所述的纽扣电池，其特征在于，所述折边部为沿所述侧壁周向环绕设置的环形结构。
  7. 根据权利要求1所述的纽扣电池，其特征在于，所述上壳通过一体注塑成型。
  8. 根据权利要求5所述的纽扣电池，其特征在于，所述第三壳体对应所述连接部开设有凹槽，所述连接部插入所述凹槽中。
PCT/CN2020/102991 2020-06-23 2020-07-20 一种纽扣电池 WO2021258452A1 (zh)

Applications Claiming Priority (2)

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