Patent ID: 7239147
Filing Date: 2007-07-03
Classification: H01M,Y02E,Y02P

Abstract:
1. A method for manufacturing a secondary battery comprising: making a secondary battery precursor including a pair of electrodes and a separator disposed between the pair of electrode ; and inspecting the secondary battery precursor, wherein the step of inspecting the secondary battery precursor comprises: applying a constant inspection voltage between the pair of electrodes before an electrolyte solution is injected between the pair of electrodes, and measuring a current flowing due to application of the inspection voltage at intervals of 1 ms or less; and determining the precursor to be defective if a current value exceeding a previously set reference current value is detected within a time period corresponding to a time period between an appearance of peak current due to an inrush current and obtaining of a constant current when a voltage is applied to a normal secondary battery precursor, the time period being within 60 milliseconds from starting of the application of the inspection voltage.