Patent ID: 6307353
Filing Date: 2001-10-23
Classification: H01M,H02J,Y02B,Y02E

Abstract:
A secondary battery apparatus comprising:a secondary battery;a switch element provided in series in a charge circuit of said secondary battery;a voltage detector for detecting a terminal voltage of said secondary battery;a full charge detector for detecting said secondary battery having reached a fully charged state; anda charge controller for controlling charging of said secondary battery by conducting or blocking said switch element, said charge controller including:a pulse charging starting unit for starting a conducting/blocking operation of said switch element at predetermined intervals to start pulse charging said secondary battery when the terminal voltage exceeds a first set voltage during the charging of said secondary battery;a pulse charging stopping unit for stopping said pulse charging while maintaining said switch element in a conductive state when the terminal voltage has reached a second set voltage during a switch element blocking period of said pulse charging; anda charge stopping unit for blocking said switch element to stop charging subsequent to said pulse charging when said full charge detector detects the fully charged state of said secondary battery during the charging subsequent to said pulse charging.