Patent ID: 9647478
Date: 2017-05-09
CPC Classifications: H02J

Claim:
1. A method for discharging an electrical charge from a first electrical network including a capacitor, the first electrical network being a high-voltage network and connected via a switch to a high-voltage battery into a second electrical network including a power supply having a nominal voltage, the second electrical network being a low-voltage network, the method comprising: connecting the first electrical network to the second electrical network by means of a DC-DC converter having an adjustable output, discharging the capacitor of the first electrical network by means of the DC-DC converter and, simultaneously transferring, via the DC-DC converter, electrical energy into the second electrical network when the switch is opened, setting, for discharging, the output voltage of the DC-DC converter to a first voltage value, which is larger than the nominal voltage, for a predefined first period of time, and subsequently setting the output voltage of the DC-DC converter to a second voltage value, which is larger than the first voltage value, for a predefined second period of time.