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Separator for storage battery, storage battery, and method of producing storage battery

A storage battery and separator technology, applied in the direction of lead-acid battery, lead-acid battery construction, battery pack components, etc., can solve the problems of reduced electrolyte retention rate, lower battery assembly efficiency, lower porosity, etc.

Inactive Publication Date: 2006-03-22
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the case of using the separator proposed in the above-cited patent document, it is certain that, as can be seen from the above-mentioned conventional separator and storage battery mainly composed of only glass fibers, problems due to assembling the electrodes The problem of lowering the efficiency of battery assembly due to the increase in the pressure required to enter the battery, but the incorporation of tiny hollow bodies in the gaps between the glass fibers that are the main component of the separator can reduce the porosity of the separator, Therefore, the electrolyte retention rate is reduced, that is, the liquid absorption capacity or liquid absorption capacity of the separator is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] "Matsumoto Microsphere F-55" produced by Matsumoto Yushi-Seiyaku Co., Ltd., 95% by weight of glass fibers with an average fiber diameter of 0.7 μm and 5% by weight, was used as a polyacrylonitrile-based resin. The resulting heat-expandable microcapsule powder is dispersed and mixed in water. Then, an acrylamide-based adsorbent is added to the mixture, so that the expandable microcapsules are adsorbed and supported in the glass fibers. Using a general paper machine, the mixture was formed into a sheet, and the sheet was dried at 95° to obtain a separator.

example 2

[0034] 90% by weight of glass fibers having an average fiber diameter of 0.7 μm and 10% by weight of “Matsumoto Microsphere F-55” produced by Matsumoto Yushi-Seiyaku Co., Ltd. were used as the polyacrylonitrile-based resin. The resulting heat-expandable microcapsule powder is dispersed in water and mixed. Then, an acrylamide-based adsorbent is added to the mixture in order to adsorb the expandable microcapsules into the glass fibers and support them in the glass fibers. Using a general paper machine, the mixture was formed into a sheet, and this sheet was dried at 95° to obtain a separator.

example 3

[0036] As the polyacrylonitrile-based resin, 80% by weight of glass fibers having an average fiber diameter of 0.7 μm and 20% by weight of “Matsumoto Microsphere F-55” produced by Matsumoto Yushi-Seiyaku Co., Ltd. The resulting heat-expandable microcapsule powder is dispersed and mixed in water. Then, an acrylamide-based adsorbent is added to the mixture in order to adsorb the expandable microcapsules into the glass fibers and support them in the glass fibers. Using a general paper machine, the mixture was formed into a sheet, and the sheet was dried at 95° to obtain a separator.

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Abstract

The separator for storage battery of the present invention is a separator for storage battery mainly composed of microfibrous glass and an expanded microcapsule which has been kept in shape with its shell rendered water-permeable by expansion is incorporated in the aforesaid microfibrous glass so that an electrolyte can be retained in the gap between the glass fibers and in the expanded microcapsule to provide a high electrolyte retention and allow the aforesaid expanded microcapsule to act as a cushioning material, whereby the separator is provided with an enhanced restoring force under pressure and is thus kept the adhesion to the electrode over an extended period of time, making it possible to attain the enhancement of the storage battery capacity and the prolongation of its life and apply only a low pressure to incorporate the electrode group in the battery case during assembly of storage battery.

Description

technical field [0001] The invention relates to a separator for an accumulator consisting essentially of microfiber glass, an accumulator comprising such a separator and a method for producing an accumulator. Background technique [0002] The separator of a battery such as that of a valve-regulated lead-acid battery needs to act as an insulating material interposed between the positive and negative electrodes to separate the two electrodes from each other and retain the electrolyte. For this reason, batteries are produced from battery separators mainly composed of ultra-fine glass fibers that are excellent in acid resistance, oxidation resistance, and hydrophilicity, and have a thickness of about 0.6 to 2 μm that can increase porosity. average fiber diameter. In a battery including a separator mainly composed of such microfiber glass and having a high electrolyte retention rate, when the electrolyte is injected into the battery case, the friction of the glass fibers against...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/14H01M50/42H01M50/437
CPCH01M2/1653H01M2/1613Y10T29/49108Y02E60/10H01M50/44Y02P70/50H01M50/437H01M50/42
Inventor 柿崎芳信三谷拓生
Owner NIPPON SHEET GLASS CO LTD
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