| 摘要 |
After the initial current set processing is performed, by which a feed amount of a charge current Ic by a charge current feed portion 35 is set to a first current value I1 exceeding a reference current value Ie preset as a current value of the charge current at which the charge current is flown without causing substantially any deterioration in secondary batteries 141, 142, and 143 while negative electrode potential of the secondary batteries 141, 142, and 143 has dropped to substantially 0 V, the charge current is changed in such a manner that the current value keeps decreasing with an increase of a terminal voltage Vt detected by a voltage detection portion 15 until the terminal voltage Vt detected by the voltage detection portion 15 reaches an end voltage Vf, which is the terminal voltage across a set battery 14 when the negative electrode potentials of the secondary batteries 141, 142, and 143 have dropped to substantially 0 V. |
