Charging control device and a charging control method for a secondary battery

When the motor generator coupled to the engine (8) (7) recovering kinetic energy of operation and the vehicle as a power generator as the power, in the initial charging of the battery (1), the program timer (4a) switch circuit ( 23) all closed to (26), regenerative power from the motor generator (7) is charged and the resistance to the capacitor (14) (15), is used for consumption in (16), flows through the battery (1) the charging current at the start of charging suppressed further, opening switch circuit (23) while the closed switch circuit (26), (25) to sequentially open and finally the switch circuit of a capacitor (14) (24) by gradually decreasing the inhibition rate of the charging current to the battery (1), by increasing until the charging current when not inhibited, the kinetic energy It is possible to extend the cycle life of the battery (1) which is charged from the generator to regenerate as raw power.