Power supply device for hybrid car, has supply circuit including power relay, and precharge circuit including another power relay in series with power resistor, where relays are power semiconductor relays

摘要

The device (1) has a supply circuit (4) connecting an electrical energy storage element i.e. battery (2) to an electric network of a hybrid car, and having a power relay (9). A precharge circuit (6) connects the battery to a high-voltage electricity grid, where the precharge circuit includes another power relay (12) in series with a power resistor (8). The power relay of the supply circuit is a relay of a power semiconductor, and the power relay of the precharge circuit is a relay of another power semiconductor.