| 摘要 |
PROBLEM TO BE SOLVED: To provide a control system of a power source mounted on a vehicle, is effective in overcurrent protection and power saving. SOLUTION: An output node 20 is connected with a power supply line 11 from a power source 10 to a load electrical equipment. A first power supply control unit 1 limits a current flowing downstream from the output node to the electrical equipment. A second power supply control unit 1 is connected with the upstream between a power source and the output node. An overcurrent or the like generated downstream is limited and controlled by the first power control system. An overcurrent or the like generated upstream is limited by the second power supply control unit. Abnormal information due to an overcurrent or an excessively small current which are detected by the first power supply control unit is sent to also the second power supply control unit, which changes a current threshold every time on the basis of the abnormal information, and executes power cutting, squeezing, etc., at a level lower than the rating current of the power source. By the power supply control on the upstream side, power saving is performed.
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