| 摘要 |
PROBLEM TO BE SOLVED: To offer a controller for the battery of a vechile, which can suppress a power consumption and can compute the residual capacity of a battery, securing a precision sufficient for practical use. SOLUTION: This controller has temperature detecting means 12 and 13 that detect the cooling water temperature and the ambient temperature of an engine 2, a storage means 14 which stores the cooling water temperature Twini and the ambient temperatures TAoff detected at ignition off, a voltage measuring means 11 which measures the path opening volatge of a battery 9, and an operation means 6 which operates the estimated water temperature Twx after lappse of a certain time since ignition off, based on the outside air temperature TA detected at ignition on after ignition off. This controller compares the coolling water temperature Tw detected at ignition on with the estimated water temperature Twx, and in case the cooling water temperature Tw is lower than the estimated water temperature Twx, it computes the residual capacity of a battery to the path opening voltage measured at ignition on, and in case the cooling water temperature Tw is higher than the estimated water temperature Twx, it uses the residual capacity of the battery at ignition off or just after it. COPYRIGHT: (C)2005,JPO&NCIPI |
