Process for manufacturing of battery plates
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTsutomu Iwaki, Yoshihiro Kobayashi
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Abstract
Softening and separation of an active material in flat-type pasted positive plates are prevented by a simple process with an inexpensive material so that the life may be comparable with that of clad type positive plates. Finely divided, corrosion inhibitive, thermoplastic resin powder is sprayed or otherwise applied over a pasted positive plate and heated and melted to form thin porous layers over the major surfaces of the positive plate. According to another aspect of the invention, the same resin powder is melted and bonded within the positive plate so that porous layers may be formed within the plate in addition to the porous layers on the major surfaces.
Claims6
A process for manufacture of pasted positive and negative plates for lead acid batteries comprising the steps of
- applying a paste-like active material to a support,
- applying an adhering finely divided, corrosion-inhibitive thermoplastic resin powder over said paste-like active material, and
- heating said corrosion-inhibitive, thermoplastic resin at a temperature in excess of its melting point.
A process for manufacture of pasted positive and negative plates for lead acid storage batteries comprising:
- (a) applying a paste-like active material to a support to form a supported active material;
- (b) applying and adhering to the surface of said supported active material a first finely divided corrosion inhibitive thermoplastic resin powder;
- (c) heating said first finely divided, corrosion inhibitive, thermoplastic resin powder to a temperature above its melting point to form a porous layer having a mesh like structure;
- (d) impregnating said supported active material with a second finely divided, corrosion-inhibitive thermoplastic resin powder, having a particle size smaller than said first finely divided, corrosion inhibitive thermoplastic resin powder, through the pores of the porous layer of thermoplastic resin;
- and
- (e) heating said second finely divided, corrosion-inhibitive, thermoplastic resin powder impregnated in the supportive active material to a temperature above its melting point.
Dependencies are inferred from the claim text.