INSPECTION METHOD OF ELECTRODE PLATE FOR SECONDARY BATTERY, AND INSPECTION METHOD OF ELECTRODE GROUP FOR SECONDARY BATTERY

摘要

PPROBLEM TO BE SOLVED: To solve problems wherein, although a porous and electrically insulating heat-resistant layer is formed on an electrode plate in order to secure safety of a lithium secondary battery recently, only stabilization of a film thickness by production conditions and inspection of an outer appearance are conducted to secure an electrical insulation property of the heat-resistant layer. PSOLUTION: In the inspection method of the electrode plate for a secondary battery, a porous insulating layer 3 formed on the electrode plate 1 is inspected, wherein a current flowing in accordance with application of a voltage for inspection is measured while applying a voltage on the porous insulating layer 3, and defect resulting in internal short circuit of the electrode plate 1 is determined by comparing with a previously set current. PCOPYRIGHT: (C)2010,JPO&INPIT