| 摘要 |
PROBLEM TO BE SOLVED: To improve power efficiency by enabling the reduction of the number of components and lessening its loss, and also to achieve its cost reduction by enabling its long-time operation. SOLUTION: A battery pack 1 is equipped with an FET Q1 which controls the charge current of a secondary battery B1, an overcharge detecting circuit 11 which detects the overcharge of the secondary battery B1, a charge control circuit 12 which controls the ON/OFF of the FET Q1, according to the detection results, an FET Q2 which controls the discharge current of the secondary battery B1, an overdischarge detecting circuit 13 which detects the overdischarge of the secondary battery B1, a discharge control circuit 14 which controls the duty of the ON/OFF of the FET Q2 and also switches off the FET Q2 when the overdischarge detecting circuit 13 detects its overdischarge, and an LC filter circuit 16. COPYRIGHT: (C)2006,JPO&NCIPI |
