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Zinc/air cell

A battery and electrochemical technology, applied in battery electrodes, battery pack components, battery boxes/jackets, etc., can solve problems such as electrolyte leakage, deformed surface of the cathode disk, and wrinkling.

Inactive Publication Date: 2006-06-07
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the cathode disk is designed such that its diameter is much larger than the inner diameter of the cathode casing, deformation and surface wrinkling of the cathode disk will occur
This also causes the electrolyte to leak from the inside of the battery

Method used

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  • Zinc/air cell
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Anode shell and cathode shell wall thickness 4mil (0.102mm)

[0066] Zinc / air cells were fabricated according to the process of the present invention with the following overall dimensions: about 8 mm in diameter and about 4 mm in thickness (Duracell 312 size). The anode can 260 and cathode can 240 of the finished cell had a thin wall thickness of 4 mils (0.102 mm). The anode casing has a folded (double) sidewall comprising an inner portion 263a and an outer portion 263e. The sidewall thickness of insulating seal 270 is 6.5 mil (0.165 mm). The overall diameter of the cathode disk 233 was measured after the cathode disk 233 was inserted and punched into the cathode casing, the anode disk 233 overall diameter being 2.0 mil (0.0508 mm) larger than the inner diameter (d2) of the cathode casing. Before pushing the cathode casing 240 over the anode casing 260 with the insulating seal 270 disposed therebetween, as image 3 The outer diameter (diameter d1 ) of the anode casi...

Embodiment 2

[0069] Anode shell and cathode shell wall thickness 2.5mil (0.0635mm)

[0070] Zinc / air cells were fabricated according to the process of the present invention with the following overall dimensions: about 8 mm in diameter and about 4 mm in thickness (Duracell 312 size). The anode can 260 and cathode can 240 of the finished cell had a thin wall thickness of 2.5 mils (0.0635 mm). The anode casing has a folded (double) sidewall comprising an inner portion 263a and an outer portion 263e. The sidewall thickness of insulating seal 270 is 4.0 mil (0.102 mm). The overall diameter of the cathode disk 233 was measured after the cathode disk 233 was inserted and flushed into the cathode casing, and the overall diameter of the anode disk 233 was 1.5 mil (0.0381 mm) larger than the inner diameter (d2) of the cathode casing. Before pushing the cathode casing 240 over the anode casing 260 with the insulating seal 270 disposed therebetween, as image 3 The outer diameter (diameter d1 ) of...

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Abstract

A zinc / air cell having thin walled cup shaped anode casing and cathode casing. The cell may be a button cell having an anode comprising zinc and a cathode, which may be catalytic, comprising manganese dioxide. The anode and cathode casings have small wall thicknesses, preferably between 2 and 5 mil (0.0508 and 0.127 mm), desirably between about 2 and 3 mil (0.0508 and 0.0762 mm). There is an insulating seal ring covering at least a portion of the anode casing side walls. During cell assembly the cathode casing side wall is pushed over at least a portion of the anode casing side wall with insulating sealing disk therebetween. A tight interference fit is achieved with the outside diameter of the anode casing plus insulating seal thereon being preferably between about 2 and 4.5 mil (0.0508 and 0.114 mm) greater than the inside diameter of the cathode casing. This reduces the tendency of the casing side walls to spring back after crimping.

Description

technical field [0001] The present invention relates to a metal / air battery having a zinc-containing anode and an air cathode. The present invention relates to metal / air batteries and assemblies thereof having an anode comprising zinc and an air cathode comprising manganese dioxide. Background technique [0002] Zinc / air depolarized cells are usually in the form of small button cells which have particular application as batteries for electronic hearing aids including programmable hearing aids. These small batteries typically have a disc-like cylindrical shape with a diameter between about 4-12 mm and a height between about 2-6 mm. Zinc-air batteries can also be fabricated with Zn / MnO equivalent to conventional AAAA, AAA, AA, C, and D sizes 2 Alkaline cells are slightly larger than the cylindrical case size and are manufactured in even larger sizes. [0003] Small zinc / air button cells typically include an anode casing (anode can) and a cathode casing (cathode can). Both ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/04H01M4/24H01M4/36H01M4/42H01M12/06H01M50/184H01M50/186H01M50/193
CPCH01M4/02H01M4/0478H01M4/24H01M4/364H01M4/366H01M4/42H01M12/06H01M2004/027H01M2004/028Y02E60/10H01M50/109H01M50/184H01M50/186H01M50/193
Inventor 基思·巴克尔
Owner THE GILLETTE CO