INSPECTION METHOD AND INSPECTION DEVICE FOR SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for detecting a defect of a secondary battery, capable of accurately distinguishing internal short-circuiting or potential short-circuiting, without damaging an electrode of a normal battery. SOLUTION: The inspection method comprises determining failure of an electrode, if current made to flow in a circuit when applying voltage to the electrode is larger than the current made to flow when applying voltage to a normal electrode. The voltage to be applied to the electrode is an AC voltage having a voltage amplitude in a range where partial discharge does not occur in a normal electrode. COPYRIGHT: (C)2005,JPO&NCIPI