| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply system which removes variations in the SOCs (charging rates) of a plurality of systems of battery units which are connected in parallel and the battery voltages during discharges and completely discharges the battery units of all the systems. SOLUTION: In a configuration, dischargers 31, 32, ..., 3N at every system controlling the current values of discharge currents supplied to a load 2 from each of a plurality of systems of the battery units connected in parallel are connected to each of a plurality of systems of respective battery unit. In the configuration, a control circuit 90 computes the difference between the charging statuses of two systems of mutually adjacent battery units 4i and 4(i+1), such as, the SOCs or the battery voltages regarding each of a plurality of systems of the battery units 41, 42, ..., 4N. In the configuration, the control circuit controls the current values of the discharge currents of two systems of the dischargers 3i and 3(i+1) connected corresponding to two systems of the battery units 4i and 4(i+1) to an equal value, when the difference is a preset charging-status threshold value, such as, an SOC threshold or a battery-voltage threshold or less. COPYRIGHT: (C)2011,JPO&INPIT
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