| 摘要 |
PROBLEM TO BE SOLVED: To shorten the charging time of a large capacity battery pack having parallel connection structure of secondary batteries without increasing the charging current. SOLUTION: When the output DC voltage of an AC-DC converter 2 is present, a first switch means 6 is turned off to supply the output DC voltage of an AC-DC converter 2 to a DC voltage output terminal 3 and a plurality of secondary batteries 10a, 10b, 10c and 10d of a battery pack 10 are connected in series by second switch means 15a, 15b, 15c, 16a and 16b and the battery pack 10 is charged by a charging circuit 5. When the output DC voltage of the AC-DC converter 2 is not present, the first switch means 6 is turned on to supply the output of the battery pack 10 to the DC voltage output terminal 3 and the plurality of secondary batteries 10a, 10b, 10c and 10d of the battery pack 10 are connected in parallel by the second switch means 15a, 15b, 15c, 16a and 16b. COPYRIGHT: (C)2006,JPO&NCIPI |
