MULTI-LAYER METAL SHEET FOR THIN BATTERY AND MANUFACTURE OF THIN BATTERY USING IT

摘要

PURPOSE:To improve the adhesion between a metal sheet and a film substrate and extend the life of a battery by coating preset chlorinated polypropylene on the metal sheet in sequence into a multi-layer structure. CONSTITUTION:A positive electrode plate and a negative electrode plate are arranged on the same plane of a film substrate to form the positive electrode plate and negative electrode plate of a thin battery formed into a bag shape by heat-sealing outer peripheries of two film substrates to cover an electrode plate group filled with an electrolyte in a gap between the positive electrode plate and the negative electrode plate as current collector metal sheets. The metal sheet is coated with an epoxy resin layer 2 and a layer 3 made of either chlorinated polypropylene containing maleic anhydride skeleton or a mixed composition material of chlorinated polypropylene containing maleic anhydride skeleton and diglycidyl ether on the surface of a metal thin layer 1. The coated layer 3 and the film substrate are heat-pressed at 130-210 deg.C.