WO2020037535A1 - 一种微型电池 - Google Patents

一种微型电池 Download PDF

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Publication number
WO2020037535A1
WO2020037535A1 PCT/CN2018/101701 CN2018101701W WO2020037535A1 WO 2020037535 A1 WO2020037535 A1 WO 2020037535A1 CN 2018101701 W CN2018101701 W CN 2018101701W WO 2020037535 A1 WO2020037535 A1 WO 2020037535A1
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WO
WIPO (PCT)
Prior art keywords
end cap
cap body
battery
conductive sheet
sheet
Prior art date
Application number
PCT/CN2018/101701
Other languages
English (en)
French (fr)
Inventor
黄凯
欧阳巍
周超
Original Assignee
珠海微矩实业有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 珠海微矩实业有限公司 filed Critical 珠海微矩实业有限公司
Priority to PCT/CN2018/101701 priority Critical patent/WO2020037535A1/zh
Publication of WO2020037535A1 publication Critical patent/WO2020037535A1/zh

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/172Arrangements of electric connectors penetrating the casing
    • H01M50/174Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/181Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for button or coin cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147Lids or covers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/572Means for preventing undesired use or discharge
    • H01M50/584Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593Spacers; Insulating plates
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the invention relates to the technical field of batteries, and more particularly, to a miniature battery.
  • Micro batteries are one of the important development directions in the current battery field. How to reduce the structural size of the battery and improve its space utilization is a technical problem that needs to be solved urgently.
  • the existing miniature button battery usually includes a lower case with a positive polarity and a top cover with a negative polarity; when the button battery is in use, the negative output interface of the button battery is led out from the top cover, and the positive output interface needs to be from the bottom The shell is drawn out and wound along the shell to the top of the top cover, resulting in reduced space utilization.
  • a button battery is provided.
  • the shell of the button battery includes a conductive end wall, the end wall includes at least one lead-out hole, and a conductive body is disposed in the at least one lead-out hole.
  • the at least one An insulating seal is provided between the hole wall of the lead-out hole and the conductor for insulating the end wall.
  • the positive and negative electrodes of the coin cell are electrically connected to the end wall and a conductor located on the end wall, respectively, and are therefore on the same side of the coin cell.
  • the thickness and size of the structure of the conductor and the insulating sealing body of the button battery are large, and it is not easy to manufacture.
  • the technical problem to be solved by the present invention is to provide an improved micro battery in response to the above defects of the prior art.
  • the technical solution adopted by the present invention to solve its technical problems is to construct a miniature battery, which includes a battery case with an opening at one end and an electrode isolation assembly, the electrode isolation assembly includes at least one positive electrode and at least one negative electrode.
  • the battery further includes a battery end cap for sealingly covering the opening of the battery case.
  • the battery end cap includes an end cap body, a conductive sheet, and an insulation bond disposed between the end cap body and the conductive sheet.
  • the end cap body and the conductive sheet are insulated and bonded to each other through the insulating bonding sheet, the end cap body and the insulating bonding sheet are provided with lead-out holes, and the end cap body and the battery case are installed Cooperate to form an accommodating space, the electrode isolation assembly is disposed in the accommodating space, the end cap body is electrically connected to one of the at least one positive electrode and the at least one negative electrode, and the conductive sheet And another electrical connection with both the at least one positive electrode and the at least one negative electrode.
  • the insulating bonding sheet and the conductive sheet are disposed in the accommodating space.
  • an outer dimension of the insulating bonding sheet is larger than an outer dimension of the conductive sheet.
  • the insulating bonding sheet and the conductive sheet are disposed outside the accommodation space.
  • the battery case is substantially cylindrical with an opening at the top
  • the end cap body covers the opening of the battery case in a flat plate shape
  • the periphery of the end cap body can pass through.
  • the laser welding is hermetically combined with the opening edge of the battery case.
  • the battery case is substantially cylindrical with an opening at the top
  • the end cap body includes a circular top wall and a cylindrical side wall surrounding a periphery of the circular top wall.
  • the end cap body is buckled inside the battery case and sealed by a sealant.
  • the thickness of the end cap body, the insulating bonding sheet, and the conductive sheet are all between 0.02-1 mm.
  • the electrode isolation component is in the form of a spiral winding, and a central axis of the electrode isolation component coincides with a central axis of the accommodation space.
  • a plurality of recesses are formed on the end cap body and a surface on which the conductive sheet and the insulating bonding sheet are combined.
  • the end cap body, the insulating bonding sheet, and the conductive sheet are connected by laser welding.
  • the insulating bonding sheet is made of plastic, rubber, or TPE material.
  • the thicknesses of the end cap body, the insulating bonding sheet, and the conductive sheet are each approximately 0.15 mm.
  • the micro battery is a button battery.
  • an outer dimension of the end cap body is larger than an outer dimension of the insulating bonding sheet, and an outer dimension of the insulating bonding sheet is larger than an outer dimension of the conductive sheet.
  • the center axis of the end cap body, the center axis of the insulating bonding sheet, and the center axis of the conductive sheet all coincide with the center axis of the battery case.
  • the implementation of the micro battery of the present invention has at least the following beneficial effects:
  • the end cap of the micro battery of the present invention adopts an end cap body, an insulating bonding sheet, and a conductive sheet to be stacked and connected in order.
  • the body and the conductive sheet are electrically connected to the positive and negative electrodes of the battery, respectively.
  • the positive and negative output interfaces of the battery are led from the same side of the battery, which further improves the space utilization rate.
  • due to the insulating bonding sheet and the end cover The bonding force between the body and the conductive sheet has a certain strength value.
  • the insulation bonding sheet and the end cap body or the conductive sheet will detach, thereby opening the pressure release and improving the battery safety. Further, by combining the end cap body, the insulating bonding sheet, and the conductive sheet with laser welding, the thickness of the end cap body, the insulating bonding sheet, and the conductive sheet can be made very small, thereby greatly reducing The thickness of the battery end cap.
  • FIG. 1 is a schematic perspective view of a micro battery in some embodiments of the present invention.
  • FIG. 2 is a schematic longitudinal sectional structural diagram of a micro battery in some embodiments of the present invention.
  • FIG. 3 is an enlarged schematic view of A in FIG. 2; FIG.
  • FIG. 4 is a schematic longitudinal sectional structure diagram of a miniature battery in other embodiments of the present invention.
  • FIGS 1-3 show a miniature battery in some embodiments of the present invention.
  • the miniature battery includes a battery case 1 with an opening at one end, an electrode isolation assembly 2, and a battery terminal for sealingly covering the opening of the battery case 1.
  • the electrode isolation assembly 2 includes at least one positive electrode 22 and at least one negative electrode 21, and an insulating separator 23 located between the positive electrode 22 and the negative electrode 21.
  • the electrode isolation assembly 2 may be in the form of a spiral winding or in the form of a laminated sheet.
  • the battery end cap 3 includes an end cap body 31, a conductive sheet 33, and an insulating bonding sheet 32 disposed between the end cap body 31 and the conductive sheet 33.
  • the end cap body 31 and the conductive sheet 33 are insulated and bonded to each other through the insulating bonding sheet 32.
  • the end cap body 31 is installed and matched with the battery case 1 to form an accommodating space 4.
  • the electrode isolation assembly 2 is disposed in the accommodating space 4.
  • the end cap body 31 and the insulating bonding sheet 32 are provided with lead-out holes 34 for lead-out electrodes.
  • the end cap body 31 is electrically connected to one of the at least one positive electrode and the at least one negative electrode
  • the conductive sheet 33 is electrically connected to the other of the at least one positive electrode and the at least one negative electrode.
  • the battery case 1 of the button battery is substantially cylindrical with an opening at the top, and the end cap body 31 is substantially flat and covers the opening of the battery case 1 and the end cap body The peripheral edge of 31 can be sealed with the opening edge of the battery case 1 by laser welding.
  • the positive electrode 22 of the electrode isolation assembly 2 may be connected to the conductive sheet 33 through the lead-out hole 34, and the negative electrode 21 of the electrode isolation assembly 2 is connected to the end cap body 31; the insulating bonding sheet 32 and conductive The sheet 33 may be provided inside the accommodation space 4.
  • the end cap body 31, the insulating bonding sheet 32 and the conductive sheet 33 can be bonded together by means of laser welding.
  • the insulating bonding sheet 32 is made of a plastic material, and the surface of the end cap body 31 and the conductive sheet 33 combined with the insulating bonding sheet 32 are surface-treated in advance to form a plurality of recesses 35. After the laser welding, the insulating bonding sheet 32 A portion of the heat is melted into the recess 35, so that the bonding is more tight.
  • the end cap body 31, the insulating bonding sheet 32, and the conductive sheet 33 may also be bonded together by means of ultrasonic welding, nano injection molding, or glue bonding.
  • the insulating bonding sheet 32 may also be made of rubber, TPE or other insulating materials.
  • FIG. 4 shows a miniature battery according to another embodiment of the present invention.
  • the miniature battery includes a battery case 1a with an opening at one end, an electrode isolation assembly 2a, and a battery end cap for sealingly covering the opening of the battery case 1a. 3a.
  • the electrode isolation assembly 2a includes at least one positive electrode 22a and at least one negative electrode 21a, and an insulating separator 23a located between the positive electrode 22a and the negative electrode 21a.
  • the electrode isolation assembly 2a may be in the form of a spiral winding or in the form of a laminated sheet.
  • the battery end cap 3a includes an end cap body 31a, a conductive sheet 33a, and an insulating bonding sheet 32a provided between the end cap body 31a and the conductive sheet 33a.
  • the end cap body 31a and the conductive sheet 33a are insulated and bonded to each other through the insulating bonding sheet 32a.
  • the end cover body 31a is installed and matched with the battery case 1a to form an accommodating space 4a.
  • the electrode isolation assembly 2a is disposed in the accommodating space 4a.
  • the end cover body 31a and the insulating bonding piece 32a are provided with lead-out holes 34a for leading out electrodes.
  • the end cap body 31a is electrically connected to one of the at least one positive electrode and the at least one negative electrode
  • the conductive sheet 33a is electrically connected to the other of the at least one positive electrode and the at least one negative electrode.
  • the battery case 1a in the button battery includes a circular bottom wall and a cylindrical side wall surrounding the periphery of the bottom wall.
  • the end cap body 31a includes a circular top wall and a surrounding On the cylindrical side wall of the peripheral edge of the top wall, the end cap body 31a is buckled inside the battery case 1 and is insulated and sealed by a sealant 5a.
  • the positive electrode 22a of the electrode isolation assembly 2a may be connected to the conductive sheet 33a, and the negative electrode 21a may be connected to the end cap body 31a.
  • the insulating bonding sheet 32a and the conductive sheet 33a may also be disposed in the accommodating space. 4a outside.
  • the end cover body 31a, the insulating bonding sheet 32a, and the conductive sheet 33a can be bonded together by laser welding.
  • the insulating bonding sheet 32a is made of a plastic material, and the surface of the end cap body 31a and the conductive sheet 33a combined with the insulating bonding sheet 32a are subjected to surface treatment in advance to form a plurality of recesses. After laser welding, the A part is hot-melted into the recess, thereby making the bonding tighter.
  • the end cap body 31a, the insulating bonding sheet 32a, and the conductive sheet 33a may also be bonded together by means of ultrasonic welding, nano injection molding, or glue bonding.
  • the insulating bonding sheet 32 may also be made of rubber, TPE or other insulating materials.
  • a lead-out hole 34a is formed on the end cap body 31a and the insulating bonding piece 32a;
  • the conductive sheet 33a is bonded to the insulating bonding sheet 32a by laser welding.
  • the electrode isolation assembly 2a is in the form of a spiral winding, and an axis thereof coincides with a central axis of the accommodation space 4a.
  • the insulating bonding sheet 32a and the conductive sheet 33a are both disc-shaped, and the diameter of the end cap body 31a is larger than the diameter of the insulating bonding sheet 32a, and the diameter of the insulating bonding sheet 32a is larger than the diameter of the conductive sheet 33a.
  • the lead-out hole 34a is opened in the middle of the end cover body 31a and the insulation bonding piece 32a. The center axis of the end cover body 31a, the insulation bonding piece 32a, the conductive piece 33a, and the lead-out hole 34a coincides with the center axis of the battery case 1a.
  • the thicknesses of the end cap body 31a, the insulating bonding sheet 32a, and the conductive sheet 33a are all between 0.02 mm and 1 mm, and preferably, the thicknesses are generally about 0.15 mm. It can be understood that, in other embodiments, the insulating bonding sheet 32a and the conductive sheet 33a may have other shapes such as a square sheet, and the lead-out hole 34a may also be opened at other positions of the end cap body 31a and the insulating bonding sheet 32a. The number of 34a is not limited to one, and two or more may be applied.
  • the battery end cap 3a can also be used as a safety pressure relief valve. As shown in FIG. 4, as the diameters of the end cap body 31 a, the insulating bonding sheet 32 a, and the conductive sheet 33 a gradually decrease, both ends of the battery end cap 3 a have a certain stepped structure, which is further affected by the internal pressure of the coin cell battery. There is a certain pressure difference between the end cap body 31a, the insulating bonding sheet 32a, and the conductive sheet 33a.
  • the insulating bonding sheet 32a and the end cap body 31a or the conductive sheet 33a will disengage. On, to achieve the opening pressure relief, thereby minimizing the degree of battery safety hazards and improving battery safety.
  • the battery end cap of the present invention can be applied to a button battery, and can also be applied to batteries of other shapes such as a square battery, a cylindrical battery, and a shaped battery.
  • the battery end cap is sequentially stacked by laser welding with the end cap body, the insulating bonding sheet and the conductive sheet, and the thickness of the end cap body, the insulating bonding sheet and the conductive sheet can be about 0.15 mm, respectively, thereby greatly The thickness of the battery end cap is reduced, which is especially suitable for the field of micro batteries.
  • the bonding force between the insulating bonding sheet, the end cap body and the conductive sheet has a certain strength value, when the internal pressure of the battery reaches a certain value, The insulation bonding sheet is detached from the end cap body or the conductive sheet, thereby opening the pressure release and improving the safety of the battery; in addition, the positive and negative electrodes of the micro battery of the present invention are separately connected to the end cap body and the conductive body constituting the battery end cap. The chip is electrically connected, so when the micro battery is in use, the positive and negative output interfaces of the battery are led from the same side of the battery, thereby further improving the space utilization rate.

Abstract

本发明涉及一种微型电池,其包括一端设有开口的电池壳体以及电极隔离组件,所述电极隔离组件包括至少一个正极和至少一个负极,该微型电池还包括用于密封盖住所述电池壳体开口的电池端盖,所述电池端盖包括端盖本体、导电片、以及设置在所述端盖本体与所述导电片之间的绝缘结合片,所述端盖本体和所述导电片通过所述绝缘结合片相互绝缘结合,所述端盖本体和所述绝缘结合片上设有引出孔,所述端盖本体与所述电池壳体安装配合形成一容置空间,所述电极隔离组件设置在所述容置空间内,所述端盖本体与所述至少一个正极和所述至少一个负极二者之一电性连接,所述导电片与所述至少一个正极和所述至少一个负极二者之另一电性连接。

Description

一种微型电池 技术领域
本发明涉及电池技术领域,更具体地说,涉及一种微型电池。
背景技术
微型电池是目前电池领域的重要发展方向之一,如何减小电池的结构尺寸、提高其空间利用率是目前亟需解决的技术问题。一般地,现有的微型纽扣电池通常包括具有正极性的下壳和具有负极性的顶盖;该纽扣电池在使用时,纽扣电池的负输出接口从顶盖引出,正输出接口则需要从下壳引出并沿着壳体绕至顶盖的上方,导致空间利用率降低。
在中国专利申请第201710901425.3号提供了一种纽扣电池,该纽扣电池的壳体包括可导电的端壁,该端壁包括至少一个引出孔,该至少一个引出孔内设有导电体,该至少一个引出孔的孔壁与该导电体之间设置有用于与该端壁绝缘的绝缘密封体。该纽扣电池的正、负极分别与该端壁以及位于该端壁上的导电体电性连接,因而都在该纽扣电池的同一侧。但是该纽扣电池的导电体和绝缘密封体结构的厚度尺寸较大,且不易加工制作。
技术问题
本发明要解决的技术问题在于,针对现有技术的上述缺陷,提供一种改进的微型电池。
技术解决方案
本发明解决其技术问题所采用的技术方案是:构造一种微型电池,其包括一端设有开口的电池壳体以及电极隔离组件,所述电极隔离组件包括至少一个正极和至少一个负极,该微型电池还包括用于密封盖住所述电池壳体开口的电池端盖,所述电池端盖包括端盖本体、导电片、以及设置在所述端盖本体与所述导电片之间的绝缘结合片,所述端盖本体和所述导电片通过所述绝缘结合片相互绝缘结合,所述端盖本体和所述绝缘结合片上设有引出孔,所述端盖本体与所述电池壳体安装配合形成一容置空间,所述电极隔离组件设置在所述容置空间内,所述端盖本体与所述至少一个正极和所述至少一个负极二者之一电性连接,所述导电片与所述至少一个正极和所述至少一个负极二者之另一电性连接。
在一些实施例中,所述绝缘结合片和所述导电片设置在所述容置空间内。
在一些实施例中,所述绝缘结合片的外形尺寸大于所述导电片的外形尺寸。
在一些实施例中,所述绝缘结合片和所述导电片设置在所述容置空间外。
在一些实施例中,所述电池壳体大致呈顶部设有开口的圆筒状,所述端盖本体呈平板状覆盖在所述电池壳体的开口上,所述端盖本体的周缘可通过激光焊接的方式与所述电池壳体的开口边缘密封地结合在一起。
在一些实施例中,所述电池壳体大致呈顶部设有开口的圆筒状,所述端盖本体包括圆形顶壁、以及围绕在该圆形顶壁周缘的圆筒状侧壁,所述端盖本体倒扣在所述电池壳体内并通过密封胶密封结合。
在一些实施例中,所述端盖本体、所述绝缘结合片、以及所述导电片的厚度分别都在0.02-1mm之间。
在一些实施例中,所述电极隔离组件采用螺旋绕组的形式,所述电极隔离组件的中轴线与所述容置空间的中轴线重合。
在一些实施例中,所述端盖本体以及所述导电片与所述绝缘结合片相结合的表面上形成有多个凹部。
在一些实施例中,所述端盖本体、所述绝缘结合片、以及所述导电片之间通过激光焊接结合连接。
在一些实施例中,所述绝缘结合片采用塑料、橡胶、或者TPE材料制成。
在一些实施例中,所述端盖本体、所述绝缘结合片、以及所述导电片的厚度大致都分别为0.15mm。
在一些实施例中,所述微型电池为纽扣电池。
在一些实施例中,所述端盖本体的外形尺寸大于所述绝缘结合片的外形尺寸,所述绝缘结合片的外形尺寸大于所述导电片的外形尺寸。
在一些实施例中,所述端盖本体的中轴线、所述绝缘结合片的中轴线、以及所述导电片的中轴线都与所述电池壳体的中轴线重合。
有益效果
实施本发明的微型电池至少具有以下有益效果:本发明的微型电池,电池端盖采用端盖本体、绝缘结合片、以及导电片依次叠置结合连接,电池端盖的厚度尺寸较小,端盖本体和导电片分别与电池的正、负极电性连接,在使用时,电池的正、负输出接口都从电池的同一侧引出,进一步提高了空间利用率;另外,由于绝缘结合片和端盖本体以及导电片之间的结合力具有一定的强度值,当电池内部压力达到一定值后,绝缘结合片与端盖本体或导电片之间会脱开,从而开启泄压,提高了电池安全性;进一步地,通过将端盖本体、绝缘结合片、以及导电片之间采用激光焊接的方式结合,端盖本体、绝缘结合片以及导电片的厚度都可以做到很小,从而大大减小了电池端盖的厚度尺寸。
附图说明
下面将结合附图及实施例对本发明作进一步说明,附图中:
图1是本发明一些实施例中的微型电池的立体结构示意图;
图2是本发明一些实施例中的微型电池的纵向剖面结构示意图;
图3是图2的A处放大示意图;
图4是本发明另一些实施例中的微型电池的纵向剖面结构示意图。
本发明的实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解,现对照附图详细说明本发明的具体实施方式。
图1-3所示为本发明一些实施例中的微型电池,该微型电池包括一端设有开口的电池壳体1、电极隔离组件2、以及用于密封盖住电池壳体1开口的电池端盖3。电极隔离组件2包括至少一个正极22和至少一个负极21以及位于正极22和负极21之间的绝缘隔离体23。电极隔离组件2可以采用螺旋绕组的形式,也可以采用叠片的形式。电池端盖3包括端盖本体31、导电片33、以及设置在端盖本体31与导电片33之间的绝缘结合片32,端盖本体31和导电片33通过绝缘结合片32相互绝缘结合,端盖本体31与电池壳体1安装配合形成一容置空间4,电极隔离组件2设置在该容置空间4内,端盖本体31和绝缘结合片32上设有用于引出电极的引出孔34,端盖本体31与所述至少一个正极和所述至少一个负极二者之一电性连接,导电片33与所述至少一个正极和所述至少一个负极二者之另一电性连接。
具体地,以纽扣电池为例,该纽扣电池的电池壳体1大致呈顶部设有开口的圆筒状,端盖本体31大致呈平板状覆盖安装在电池壳体1的开口处,端盖本体31的周缘可通过激光焊接的方式与电池壳体1的开口边缘密封地结合在一起。
端盖本体31、绝缘结合片32以及导电片33从下到上依次叠置,端盖本体31和电池壳体1安装配合形成一容置空间4,绝缘结合片32以及导电片33位于容置空间4的外部。端盖本体31和绝缘结合片32上设有引出孔34,电极隔离组件2的负极21通过引出孔34与导电片33连接,电极隔离组件2的正极22与端盖本体31连接。可以理解地,在其他实施例中,也可以是电极隔离组件2的正极22通过引出孔34与导电片33连接,电极隔离组件2的负极21与端盖本体31连接;绝缘结合片32以及导电片33也可以设置在容置空间4的内部。
端盖本体31、绝缘结合片32以及导电片33之间可通过激光焊接的方式结合在一起。优选地,绝缘结合片32采用塑料材料制成,端盖本体31以及导电片33与绝缘结合片32相结合的表面预先经过表面处理形成有多个凹部35,经过激光焊接后,绝缘结合片32的一部分热熔到该凹部35中,从而使得结合更紧密。在其他实施例中,端盖本体31、绝缘结合片32以及导电片33之间也可以通过超声焊接、纳米注塑、或者胶水粘接等方式结合在一起。在另一些实施例中,绝缘结合片32也可以采用橡胶、TPE类或者其他绝缘类材料制成。
上述电池端盖3在制造时,可采用如下步骤:
提供端盖本体31、绝缘结合片32、以及导电片33;
在端盖本体31以及绝缘结合片32上形成引出孔34;
在端盖本体31以及导电片33待与绝缘结合片32结合的表面上分别进行表面处理形成多个凹部35;
将绝缘结合片32通过激光焊接结合在端盖本体31上;
将导电片33通过激光焊接结合在绝缘结合片32上。
由于塑料和金属之间的结合力具有一定的强度值,当内部压力超过这个强度值后,塑料和金属会脱开,因此,该电池端盖3还可以当作安全泄压阀使用。如图2所示,该纽扣电池在引出孔34处,导电片33与绝缘结合片32之间具有由纽扣电池内部的压力形成的压力差,当纽扣电池内部的压力达到一定值后,导电片33与绝缘结合片32会脱开,实现开启泄压,从而最大程度降低电池安全危害程度,提高电池安全性。
电极隔离组件2采用螺旋绕组的形式,且其中轴线与容置空间4的中轴线重合。端盖本体31、绝缘结合片32、导电片33均为圆片状,且端盖本体31的直径大于绝缘结合片32的直径,绝缘结合片32的直径大于导电片33的直径。引出孔34开设在端盖本体31和绝缘结合片32的中部,端盖本体31、绝缘结合片32、导电片33、以及引出孔34的中轴线都与电池壳体1的中轴线重合。端盖本体31、绝缘结合片32以及导电片33的厚度尺寸分别都在0.02mm-1mm之间,优选地,其厚度大致都在0.15mm左右。可以理解地,在其他实施例中,绝缘结合片32以及导电片33也可以为方片状等其他形状,引出孔34也可以开设在端盖本体31和绝缘结合片32上的其他位置,引出孔34的个数也不局限于一个,两个或两个以上也可以适用。
图4所示为本发明另一些实施例中的微型电池,该微型电池包括一端设有开口的电池壳体1a、电极隔离组件2a、以及用于密封盖住电池壳体1a开口的电池端盖3a。电极隔离组件2a包括至少一个正极22a和至少一个负极21a以及位于正极22a和负极21a之间的绝缘隔离体23a。电极隔离组件2a可以采用螺旋绕组的形式,也可以采用叠片的形式。电池端盖3a包括端盖本体31a、导电片33a、以及设置在端盖本体31a与导电片33a之间的绝缘结合片32a,端盖本体31a和导电片33a通过绝缘结合片32a相互绝缘结合,端盖本体31a与电池壳体1a安装配合形成一容置空间4a,电极隔离组件2a设置在该容置空间4a内,端盖本体31a和绝缘结合片32a上设有用于引出电极的引出孔34a,端盖本体31a与所述至少一个正极和所述至少一个负极二者之一电性连接,导电片33a与所述至少一个正极和所述至少一个负极二者之另一电性连接。
具体地,以纽扣电池为例,该纽扣电池中的电池壳体1a包括圆形底壁、以及围绕在该底壁周缘的圆筒状侧壁,端盖本体31a包括圆形顶壁、以及围绕在该顶壁周缘的圆筒状侧壁,端盖本体31a倒扣在电池壳体1内并通过密封胶5a绝缘密封结合。
组成电池端盖3a的端盖本体31a、绝缘结合片32a以及导电片33a从上到下依次叠置,端盖本体31a和电池壳体1a安装配合形成一容置空间4a,绝缘结合片32a以及导电片33a位于容置空间4a的内部。电极隔离组件2a的正极22a与端盖本体31a连接,负极21a与导电片33a连接。端盖本体31a和绝缘结合片32a上设有引出孔34a,以便于将电极从导电片33a上引出以供使用。可以理解地,在其他实施例中,也可以是电极隔离组件2a的正极22a与导电片33a连接,负极21a与端盖本体31a连接;绝缘结合片32a以及导电片33a也可以设置在容置空间4a的外部。
端盖本体31a、绝缘结合片32a以及导电片33a之间可通过激光焊接的方式结合在一起。优选地,绝缘结合片32a采用塑料材料制成,端盖本体31a以及导电片33a与绝缘结合片32a相结合的表面预先经过表面处理形成有多个凹部,经过激光焊接后,绝缘结合片32a的一部分热熔到该凹部中,从而使得结合更紧密。在其他实施例中,端盖本体31a、绝缘结合片32a以及导电片33a之间也可以通过超声焊接、纳米注塑、或者胶水粘接等方式结合在一起。在另一些实施例中,绝缘结合片32也可以采用橡胶、TPE类或者其他绝缘类材料制成。
上述电池端盖3a在制造时,可采用如下步骤:
提供端盖本体31a、绝缘结合片32a、以及导电片33a;
在端盖本体31a以及绝缘结合片32a上形成引出孔34a;
在端盖本体31a以及导电片33a待与绝缘结合片32a结合的表面上分别进行表面处理形成多个凹部;
将绝缘结合片32a通过激光焊接结合在端盖本体31a上;
将导电片33a通过激光焊接结合在绝缘结合片32a上。
电极隔离组件2a采用螺旋绕组的形式,且其中轴线与容置空间4a的中轴线重合。绝缘结合片32a、导电片33a均为圆片状,且端盖本体31a的直径大于绝缘结合片32a的直径,绝缘结合片32a的直径大于导电片33a的直径。引出孔34a开设在端盖本体31a和绝缘结合片32a的中部,端盖本体31a、绝缘结合片32a、导电片33a、以及引出孔34a的中轴线与电池壳体1a的中轴线重合。端盖本体31a、绝缘结合片32a以及导电片33a的厚度尺寸分别都在0.02mm-1mm之间,优选地,其厚度大致都在0.15mm左右。可以理解地,在其他实施例中,绝缘结合片32a以及导电片33a也可以为方片状等其他形状,引出孔34a也可以开设在端盖本体31a和绝缘结合片32a的其他位置,引出孔34a的个数也不限于一个,两个或两个以上也可以适用。
由于塑料和金属之间的结合力具有一定的强度值,当内部压力超过这个强度值后,塑料和金属会脱开,因此,该电池端盖3a还可以当作安全泄压阀使用。如图4所示,由于端盖本体31a、绝缘结合片32a、导电片33a的直径尺寸逐渐减小,该电池端盖3a的两端具有一定的阶梯结构,进而在纽扣电池内部压力的作用下,端盖本体31a、绝缘结合片32a、导电片33a之间形成有一定的压力差,当纽扣电池内部压力达到一定值后,绝缘结合片32a与端盖本体31a或导电片33a之间会脱开,实现开启泄压,从而最大程度降低电池安全危害程度,提高电池安全性。
可以理解地,本发明的电池端盖可以应用在纽扣电池上,也可以应用在方形电池、柱状电池、异形电池等其他形状的电池上。本发明的微型电池,电池端盖采用端盖本体、绝缘结合片以及导电片依次叠置激光焊接结合,端盖本体、绝缘结合片以及导电片的厚度分别都可以做到0.15mm左右,从而大大减小了电池端盖的厚度尺寸,其尤其适用于微型电池领域,且由于绝缘结合片和端盖本体以及导电片之间的结合力具有一定的强度值,当电池内部压力达到一定值后,绝缘结合片与端盖本体或导电片之间会脱开,从而开启泄压,提高了电池安全性;另外,本发明的微型电池的正、负极分别与组成电池端盖的端盖本体以及导电片电性连接,因此该微型电池在使用时,电池的正、负输出接口都从电池的同一侧引出,从而进一步提高了空间利用率。
可以理解地,上述各技术特征可以任意组合使用而不受限制。
以上实施例仅表达了本发明的优选实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制;应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,可以对上述技术特点进行自由组合,还可以做出若干变形和改进,这些都属于本发明的保护范围;因此,凡跟本发明权利要求范围所做的等同变换与修饰,均应属于本发明权利要求的涵盖范围。

Claims (15)

  1. 一种微型电池,包括一端设有开口的电池壳体以及电极隔离组件,所述电极隔离组件包括至少一个正极和至少一个负极,其特征在于,还包括用于密封盖住所述电池壳体开口的电池端盖,所述电池端盖包括端盖本体、导电片、以及设置在所述端盖本体与所述导电片之间的绝缘结合片,所述端盖本体和所述导电片通过所述绝缘结合片相互绝缘结合,所述端盖本体和所述绝缘结合片上设有引出孔,所述端盖本体与所述电池壳体安装配合形成一容置空间,所述电极隔离组件设置在所述容置空间内,所述端盖本体与所述至少一个正极和所述至少一个负极二者之一电性连接,所述导电片与所述至少一个正极和所述至少一个负极二者之另一电性连接。
  2. 根据权利要求1所述的微型电池,其特征在于,所述绝缘结合片和所述导电片设置在所述容置空间内。
  3. 根据权利要求2所述的微型电池,其特征在于,所述绝缘结合片的外形尺寸大于所述导电片的外形尺寸。
  4. 根据权利要求1所述的微型电池,其特征在于,所述绝缘结合片和所述导电片设置在所述容置空间外。
  5. 根据权利要求1所述的微型电池,其特征在于,所述电池壳体大致呈顶部设有开口的圆筒状,所述端盖本体呈平板状覆盖在所述电池壳体的开口上,所述端盖本体的周缘可通过激光焊接的方式与所述电池壳体的开口边缘密封地结合在一起。
  6. 根据权利要求1所述的微型电池,其特征在于,所述电池壳体大致呈顶部设有开口的圆筒状,所述端盖本体包括圆形顶壁、以及围绕在该圆形顶壁周缘的圆筒状侧壁,所述端盖本体倒扣在所述电池壳体内并通过密封胶密封结合。
  7. 根据权利要求1所述的微型电池,其特征在于,所述端盖本体、所述绝缘结合片、以及所述导电片的厚度分别都在0.02-1mm之间。
  8. 根据权利要求1所述的微型电池,其特征在于,所述电极隔离组件采用螺旋绕组的形式,所述电极隔离组件的中轴线与所述容置空间的中轴线重合。
  9. 根据权利要求1-8任一项所述的微型电池,其特征在于,所述端盖本体以及所述导电片与所述绝缘结合片相结合的表面上形成有多个凹部。
  10. 根据权利要求9所述的微型电池,其特征在于,所述端盖本体、所述绝缘结合片、以及所述导电片之间通过激光焊接结合连接。
  11. 根据权利要求1所述的微型电池,其特征在于,所述绝缘结合片采用塑料、橡胶、或者TPE材料制成。
  12. 根据权利要求1所述的微型电池,其特征在于,所述端盖本体、所述绝缘结合片、以及所述导电片的厚度大致都分别为0.15mm。
  13. 根据权利要求1所述的微型电池,其特征在于,所述微型电池为纽扣电池。
  14. 根据权利要求1所述的微型电池,其特征在于,所述端盖本体的外形尺寸大于所述绝缘结合片的外形尺寸,所述绝缘结合片的外形尺寸大于所述导电片的外形尺寸。
  15. 根据权利要求1所述的微型电池,其特征在于,所述端盖本体的中轴线、所述绝缘结合片的中轴线、以及所述导电片的中轴线都与所述电池壳体的中轴线重合。
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JP7359849B2 (ja) 2020-07-14 2023-10-11 寧徳新能源科技有限公司 電池およびそれを備えた電気機器
EP4156386A4 (en) * 2020-12-04 2024-01-24 Zhuhai Cosmx Battery Co Ltd BUTTON BATTERY AND ELECTRONIC DEVICE
CN113426627A (zh) * 2021-06-18 2021-09-24 深圳思谋信息科技有限公司 点胶装置

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