BATTERY STATE DETECTION SYSTEM, AND AUTOMOBILE HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a battery state detection system capable of estimating the remaining capacity of a lead-acid battery. SOLUTION: The battery state detection system 12 comprises a voltage measurement unit 3 for measuring OCV of a lead-acid battery 1 when a vehicle is stopped, and a microcomputer 10 which calculates the remaining capacity of the lead-acid battery 1 by substituting OCV measured by the voltage measurement unit 3 in a formula specifying in advance the relationship between OCV of the lead-acid battery and the remaining capacity. OCV is corrected by the dark current running from the lead-acid battery 1 to the vehicular load when the vehicle is stopped, and SOH and the temperature of the lead-acid battery 1. COPYRIGHT: (C)2010,JPO&INPIT