| 摘要 |
PCT No. PCT/JP97/00170 Sec. 371 Date Sep. 9, 1997 Sec. 102(e) Date Sep. 9, 1997 PCT Filed Jan. 27, 1997 PCT Pub. No. WO97/27659 PCT Pub. Date Jul. 31, 1997According to the invention, the discharge depth representing the ratio of discharged capacity relative to the rated discharge capacity of a battery is divided into a plurality of ranges with each range allocated with the number of charges at which a refresh discharge should be carried out. The discharge depth is obtained as a sum of discharged capacity between one charge and the next. At the time of charging, summing up the count of the number of charges in the corresponding range according to the discharge depth is repeated until the number of charges in any of the ranges reaches the number at which the refresh discharge should be carried out. Then the refresh discharge is carried out either automatically or manually. Since the discharge depth is divided into a plurality of ranges with each range allocated with the number of charges at which the refresh discharge should be carried out and the refresh discharge is carried out when the number of charges in any of the ranges reaches the allocated number, the refresh discharge is carried out at an appropriate timing at which the effect of the refresh discharge is most efficiently used either automatically or manually so that the influence of the memory effect is effectively and efficiently reduced.
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