ELECTRICAL CONNECTION SYSTEM FOR CONNECTING BATTERY AND PRINTED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an electrical connection system for connecting a battery and printed circuit with high reliability with respect to manufacturing defects and battery life. SOLUTION: At least one connection part is soldered to the battery. The printed circuit includes a copper layer with a thickness of more than 70μm than is electrically connected to a metal component by soldering without using a filler metal.