METHOD OF DETECTING CHARGED STATE OF SECONDARY BATTERY, AND CHARGED STATE DETECTOR AND EQUIPMENT HAVING THE SAME

摘要

PPROBLEM TO BE SOLVED: To precisely detect a charged state of a secondary battery used by repeating charging/discharging in a vehicle, or the like. PSOLUTION: A detection method of a charged state of a secondary battery detects a charged state (SOC) of the secondary battery according to the charged capacity (CHGCAP) obtained by integrating a charge/discharge current to the secondary battery charged and discharged repeatedly in a vehicle, or the like in time and the discharged capacity (DISCAP). In the detection method, charging efficiency () is obtained from voltage (V) and internal resistance (DC-IR) of the secondary battery and the charged capacity (CHGCAP) is corrected by the charging efficiency (), thus precisely detecting the charged state of the secondary battery. PCOPYRIGHT: (C)2010,JPO&INPIT