BATTERY AND LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a battery which can increase a weight energy density value by lightening battery weight without decreasing strength of a collector. SOLUTION: A positive electrode collector constitutional unit 6 is formed by a resin-made film 6a of polyethylene terephthalate formed with a positive electrode collector (conductive thin film) 6b composed of a aluminum evaporation layer in both surfaces. A negative electrode collector constitutional unit 8 is formed by a resin-made film 8a of polyethylene terephthalate formed with a negative electrode collector (conductive thin film) 8b composed of a copper evaporation layer in both surfaces.