CHARGING SYSTEM, CHARGER, AND BATTERY PACK

摘要

After performing initial current setting processing for setting a current value (I1) exceeding a reference current (Ie) preset as a value of charging current which permits the supply quantity of a charging current (Ic) from a charging current supply section (35) to be flowed without substantially causing deterioration of secondary batteries (141, 142, 143) under such a state as the negative electrode potential of the secondary batteries (141, 142, 143) became substantially 0V, the charging current is varied such that the current value decreases as the terminal voltage (Vt) detected by a voltage detection circuit (15) increases until the terminal voltage (Vt) detected by the voltage detection circuit (15) reaches a final voltage (Vf), i.e. the terminal voltage of a battery pack (14) when the negative electrode potential of the secondary batteries (141, 142, 143) became substantially 0V.