FLAT TYPE NONAQUEOUS ELECTROLYTE BATTERY

摘要

PURPOSE:To improve sealing ability to increase storage life of a battery by forming a sealing member with a base body obtained by containing a specified amount of inorganic filler in polyolefin resin and a polyolefin resin containing carboxyl group. CONSTITUTION:A unit cell comprising a negative electrode 2 of lithium, a separator 3, and a positive electrode 4 mainly comprising manganese dioxide is placed between a negative current collector 1 and a positive current collector 6 both made of a stainless steel foil, and they are sealed to form a flat type nonaqueous electrolyte battery. A sealing member is formed by joining a base body 8 obtained by containing 3vol% or more insulating inorganic filler such as powder or flake of glass and talc in polyolefin resin and a layer 8' of polyolefin resin containing carboxyl group. When the sealing member is melt- bonded to the current collectors 1 and 6, the deformation of current collectors is prevented and sealing ability is improved to increase storage life of the battery.