Control device for power supply circuit

摘要

In a control device for a power supply circuit in which a plurality of high-voltage battery packs are provided, if any one of safety switch is off, the startup state of a high-voltage circuit is totally prevented, even when a careless mistake such as a careless power-on (ON) operation is made, the circuit is prevented from being started, and also the overall power supply is cut off by turning off (OFF) one safety switch, thereby improving the convenience of work. Voltage sensing units (9-1 to 9-n) that sense internal voltages are provided in battery packs (4-1 to 4-n) to detect a voltage change based on the operation of one or more safety switches (8-1 to 8-n) and maintain all relays (5-1 to 5-n) of the plurality of battery packs (4-1 to 4-n) provided in parallel in an open (OPEN) state.

主权项

1. A control device for a power supply circuit comprising:
a plurality of high-voltage battery packs connected in parallel with each other, comprising:
a plurality of safety switches; anda partial voltage detector, included in each of said battery packs, detecting a partial voltage of a partial circuit including said safety switch; and a plurality of relays capable of cutting off power supply from said battery packs provided and opened based on an operation of said safety switches, wherein when the partial voltage detected by said partial voltage detector does not exceed a predetermined determination voltage for a predetermined time, all of said relays are maintained in an open state.