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Thin film for package of alkaline battery and thin air battery using the same

An air battery and air electrode technology, which is applied to fuel cell-type half-cells and primary cell-type half-cells, battery electrodes, and batteries/batteries that work under specific conditions, etc. Large battery and other problems, to achieve the effect of inhibiting the penetration of water vapor into and out of the battery, preventing self-discharge, and high long-term reliability

Inactive Publication Date: 2007-02-07
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this is that if you simply increase the size of the battery, the battery will not match the space allotted for the battery in small electronic devices

Method used

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  • Thin film for package of alkaline battery and thin air battery using the same
  • Thin film for package of alkaline battery and thin air battery using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] For the sheets 1, 3 and 4 of the casing, modified polypropylene (PPa) with a thickness of 0.02 mm was used as the hydrogen gas permeable material, PEN with a thickness of 0.035 mm was used as the gas barrier material, and a three-layer structure was used. The total thickness of the composition was a sheet of 0.075 mm in which both surfaces of PEN were coated with PPa (thin sheet film (PPa-N), manufactured by Dai Nippon Printing Co., Ltd.).

[0053]The first sheet 1 was stretched to have a depth of 0.6 mm using hot pressing. In the depression, vinylon fiber paper (thickness: 0.1 mm) was placed as an air-permeable paper 5 to cover the air intake hole 2, and spots were bonded with resin to be fixed. On the vinylon fiber paper, a fine porous film of polytetrafluoroethylene (PTFE) (thickness: 0.1mm) as the waterproof membrane 6, an air electrode 7 (thickness: 0.3mm), and polypropylene as the separator 10 are laminated in this order. (PP) fine porous film (thickness: 0.05mm)...

Embodiment 2～14

[0061] The hydrogen gas permeable material, the gas barrier material, and the metal material, the thickness thereof, the composition and the thickness of the casing composed of these materials are shown in Table 1. By uniformly and fully rolling-coating modified polybutadiene whose thickness is substantially negligible on the surface of the gas barrier material sheet as a coating cement, and bonding the hydrogen gas permeable material to it, the hydrogen gas permeable material and the gas barrier Materials bond to each other. A thin air battery was fabricated in the same structure as in Example 1 except for using those described above.

[0062] hydrogen permeable material

Embodiment 15～18

[0064] Acid-modified polypropylene (PPa) having a thickness of 0.02 mm was used as the hydrogen gas permeable material, and a fluorine-containing polymer material was used as the gas barrier material, and the combination of its structure and its thickness are shown in Table 1. The surface of the fluorine-containing polymer material sheet is surface-modified by corona discharge, and the surface of the fluorine-containing polymer material sheet is roll-coated with modified polybutadiene as a coating cement, and the The hydrogen permeable material is bonded to the coating surface such that the hydrogen permeable material is bonded to the fluorine-containing polymer material. A thin air battery was fabricated in the same structure as in Example 1 except for using those described above.

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Abstract

There is provided a thin air battery comprising a power-generating element including air diffusion paper and a water repellent film, the power-generating element sealed in a package composed of first and third sheet layers that cover the air electrode side and negative electrode side of the power-generating element, and a second sheet layer disposed in the peripheral portion between the two sheet layers and joined to the two sheet layers. The sheet layers are each composed of a thin film formed by stacking an alkali resistant polymer film having hydrogen gas permeability and a polymer film having gas barrier properties, and in each of the first and third sheet layers, the polymer film having hydrogen gas permeability is disposed on the internal surface side. According to the present invention, a thin air battery that has high energy density and has excellent long-term reliability is provided.

Description

technical field [0001] The present invention relates to thin air batteries with very high energy density and excellent long-term reliability. The present invention also relates to a film for a casing of an alkaline battery such as an air battery. Background technique [0002] Since the zinc-air battery uses an air electrode that utilizes oxygen in the air as a positive electrode active material, it has been used as an economical power source that can be used for a long time without maintenance, and has been used in various auxiliary navigation, various communications, and telephone equipment superior. Among them, since the button-type zinc-air battery has characteristics such as high energy density, light weight, and economy compared with other batteries having a similar shape, its application range has been expanded, and its main application here is a hearing aid power supply. [0003] However, since the button-type air battery has the dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06H01M2/02H01M2/08H01M4/86H01M50/121H01M50/145
CPCH01M4/8605H01M2/0222H01M12/06H01M2/0255H01M2/0287Y02E60/50Y02E60/128H01M2/0265Y02E60/10H01M50/109H01M50/1385H01M50/124H01M50/121H01M50/145
Inventor 高村侯志岛村治成小柴信晴
Owner PANASONIC CORP
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