| 摘要 |
A charging system supplies a charging current of a constant value (Icc) to a secondary battery, performs a constant-current charging using the charging current until the CCV of the secondary battery reaches a predetermined threshold voltage (Vcc), and repeats a predetermined number of times (N times): —reducing the charging current currently being supplied by a predetermined current reduction amount (&Dgr;Ic), —setting the reduced charging current as a new charging current, and —performing the constant-current charging using the new charging current until the CCV of the secondary battery increases by a predetermined voltage increase amount (&Dgr;Vx), and then stops the supply of the charging current. The current reduction amount (&Dgr;Ic) is set so that the CCV of the secondary battery is larger than the fully-charged voltage (Vfull) of the secondary battery when the charging current currently being supplied is reduced by (&Dgr;Ic). |
