| 摘要 |
PROBLEM TO BE SOLVED: To efficiently charge each lithium ion secondary battery while avoiding overcharge in the charge/discharge circuit of the lithium ion secondary battery having a plurality of battery circuit lines connected in parallel, in which a plurality of lithium ion secondary batteries connected in series. SOLUTION: A bypass switch is connected to each lithium ion secondary battery in each battery circuit line, and when each lithium ion secondary battery reaches charge completion voltage, charge current is bypassed with the corresponding bypass switch, and a current limit circuit and a line control switch are connected to each battery circuit line in series to each lithium ion secondary battery contained in each battery circuit line, and when all lithium ion secondary batteries contained in each battery circuit line reach the charge completion voltage, the line control switch of the battery circuit line is turned off. COPYRIGHT: (C)2007,JPO&INPIT |
