Patent ID: 6441619
Filing Date: 2002-08-27
Classification: G01R

Abstract:
A remaining charge detection device for a power storage unit including: a current detection unit which detects the current value of a charging current and a discharging current of a power storage unit; a voltage detection unit which detects the voltage value of a terminal voltage of said power storage unit; and a current accumulation remaining charge calculation means which accumulates the current value detected by said current detection unit to obtain an accumulated charging current and an accumulated discharging current and, based on said accumulated charging current and said accumulated discharging current, calculates a remaining charge of said power storage unit, said remaining charge detection device further comprising:a no-load state detection unit which detects a no-load state of said power storage unit; and a remaining charge for calibration calculation unit which calculates, according to the voltage value detected in the no-load state of said power storage unit, a remaining charge for calibration with respect to said remaining charge of said power storage unit.