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Button cell type electrochemical element and method for producing electrochemical element

A technology of electrochemical components and button batteries, which is used in electrochemical generators, electrical components, battery pack components, etc.

Inactive Publication Date: 2004-09-29
VARTA MICROBATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the element and its method of production are concerned, complex formation processes in an isolated gas environment are not required

Method used

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  • Button cell type electrochemical element and method for producing electrochemical element

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Embodiment Construction

[0010] According to the diagram below figure 1 The main contents of the present invention are explained in detail.

[0011] An example of a lithium ion button battery as an embodiment of the present invention includes a casing 1 and a cathode (cathode) 2, which is preferably LiCoO 2 , LiNiO 2 or LiMn 2 o 4 . Furthermore, an anode 4 preferably made of graphite or carbon is included. In addition there is a cap 5 and a seal 6, eg made of polypropylene. The anode 4 is separated from the cathode 2 by using a diaphragm 3, preferably made of polypropylene or polyethylene.

[0012] In the housing 1 or in the cap 5 there is a reciprocally closable opening 8 through which the gases formed can escape. During formation, the opening 8 is glued or sealed by means of a polypropylene or polyethylene plastic sheet, or by means of a metal or metal / plastic composite sheet 7 . The metal / plastic composite sheet 5 can be, for example, an aluminum composite sheet. The sheet should allow onl...

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Abstract

An electrochemical element in the form of a button cell having at least one lithium-intercalating electrode, wherein the cell cover or the cell cup has an opening which is closed in a sealed manner during the formation process. Once the formation process has been completed, it is opened briefly for gas to escape from the cell, and is then closed in a gastight manner. The cell cover and the cell cup are composed in particular of metal. The opening can be closed by a metal or metal / plastic composite sheet, which is adhesively bonded or welded to the cell cover or to the cell cup.

Description

technical field [0001] The subject of the invention is an electrochemical element in the form of a button cell with at least one embedded lithium electrode and a method for producing the electrochemical element. Background technique [0002] Known electrochemical elements in the form of button cells have various electrodes, for example with a nickel hydroxide positive electrode and a metal hydride negative electrode or with a zinc negative electrode and a silver oxide positive electrode, or are known as lithium-ion cells. All of these button cells consist of a battery case and a battery case hermetically connected by an interposed sealing member. For rechargeable coin cells with at least one embedded lithium electrode, gases are produced during cell formation. These cells are thus formed without argon as an insulating gas and are not finally hermetically sealed until the end of the cell formation process. Contents of the invention [0003] The object of the present inven...

Claims

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Application Information

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IPC IPC(8): H01M2/04H01M2/08H01M2/12H01M6/00H01M2/02H01M10/04H01M10/052H01M10/34H01M10/36
CPCH01M2/0222Y10T29/49114H01M10/0427Y10T29/4911H01M10/052H01M2/08H01M10/342Y02E60/122Y02E60/10H01M50/109Y02P70/50
Inventor K·霍尔A·约阿斯H·瓦纳K·阿卡A·佩尔纳D·伊利克
Owner VARTA MICROBATTERY
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