| 摘要 |
PROBLEM TO BE SOLVED: To charge all cells substantially up to a full charging voltage in a well-balanced state without depending upon cell voltages.SOLUTION: A charging control circuit which controls charging to a plurality of batteries when charging to both ends of a battery circuit including a plurality of batteries connected in series is carried out by a charger includes, a plurality of switching elements connected to the plurality of batteries in parallel respectively; and charging control means of reducing a charging current to each battery, and the charging control means converts a voltage of each battery into a plurality of conversion battery voltages based upon a predetermined reference voltage on the basis of a voltage across both ends of each battery, generates offset battery voltages by adding a predetermined offset voltage to the plurality of conversion battery voltages, and compares the plurality of conversion battery voltages with the offset battery voltage, so that when each conversion battery voltage is higher than the offset battery voltage, a switching element connected to the corresponding battery in parallel is turned on to reduce the charging current to the corresponding battery. |
