NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PURPOSE:To provide a nonaqueous electrolyte secondary battery excellent in safety and in a current characteristic by maintaining high energy density and further eliminating firing and explosion even at the time of internal short- circuiting. CONSTITUTION:A separator 2, consisting of a porous polyethylene film of 20 to 30mum film thickness, 200 to 1000sec/100cc air ventilating degree (by ASTMD 726) and a 0.02 to 0.05mum mean hole diameter, holding a nonaqueous electrolyte impregnated, is interposed between a negative pole 1 consisting of carbon material and a positive pole 3 containing LiCoO2 and stored in a steel-made case 10 by winding the total unit in a volute shape.