Patent ID: 6495989
Filing Date: 2002-12-17
Classification: G01R,H02J,Y02E

Abstract:
A battery control apparatus, comprising:charge detecting means for detecting change of charge of a battery based on current of the battery; first residual charge amount detecting means coupled to said charge detecting means for detecting a first residual charge amount of said battery by compensating a predetermined reference residual charge amount based on the detected result of said change of charge of the battery; second residual charge amount detecting means for detecting a second residual charge amount of said battery based on a terminal voltage of said battery; and reference residual charge amount updating means for updating said reference residual charge amount by detected result of said second residual charge amount of said battery, wherein said second residual charge amount of said battery is detected at a predetermined timing; whereby said predetermined timing is a predetermined duration that the battery current is zero or almost zero.