Patent ID: 11878603
Assignee: NINGBO GEELY AUTOMOBILE RESEARCH & DEV. CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 8:
9. A method for charging and discharging a high-voltage capacitor in a vehicle comprising a high voltage load with a high-voltage capacitor, and a high voltage energy storage, comprising the steps of:
pre-charging the high-voltage capacitor to a predefined voltage value with a bidirectional DC/DC-converter from a low voltage energy storage before the vehicle is started,
connecting the high voltage energy storage to the high voltage load with a switching member when the voltage difference between the input side and the output side of the switching member is below a predefined value,
disconnecting the high voltage energy storage from the high voltage load after the vehicle is stopped, and
discharging the high-voltage capacitor with the bidirectional DC/DC-converter to the low voltage energy storage, and
wherein the predefined voltage value is higher than the voltage of the high-voltage energy storage at one start moment of the vehicle, and wherein the predefined voltage value is lower than the voltage of the high-voltage energy storage at another start moment of the vehicle.