| 摘要 |
A plurality of battery charging modules C, equal in number to a plurality of batteries B connected in series, are connected in series form a column of battery charging modules 6. Output terminals 7, 8 of this column 6 serve as the connecting terminals for a beginning terminal 2 and an ending terminal 3 of the series-connected column of batteries 1. A connecting point between consecutive batteries B connects to a junction point between consecutive battery charging modules C. This configuration enables the column of battery charging modules 6 to be connected with the column of batteries 1 and results in a set of parallel connections between the battery charging modules C and the corresponding batteries B. This enables current to flow at the same time from the battery charging modules C to each battery B connected in series therewith to charge batteries, and after the battery B with the largest balance of residual capacity is charged fully, the battery with the second largest balance of residual capacity is charged by the corresponding charging module C, and thereafter batteries are charged in the order of importance of residual capacity balance.
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