| 摘要 |
PURPOSE:To avoid overcharging of a battery by detecting the rise rate of the battery voltage upon elapse of a predetermined time after start of charging and then correcting the second phase charging voltage based thereon. CONSTITUTION:A controller 17 comprises an input interface 18 inputted with signals from various sensors, a MOR 19, a RAM 20, a CPU 21 performing calculations based on the input signals, programs and data, and an output interface 22 for delivering the calculation results in the form of control signals to the outside. The controller 17 stores a control program including a formula provided with coefficients for correcting the charging time depending on the rise rate of the voltage and the second phase charging time is corrected based on the battery voltage rise. Since the charging time is corrected depending on the residual capacity of the battery decided based on the battery voltage rise rate, the charging time can be shortened for a shallow discharge battery and thereby the overcharging can be avoided. |
