A bidirectional charger 10 for DC charging of electrically driven vehicles has: at least one charging terminal 11 for connecting a vehicle; and at least power electronics unit 12 for providing a defined charging current and a defined charging voltage at the respective charging terminal. When no vehicle is connected to the charging terminal, the power electronics unit of the charging terminal is subjected to a self-test voltage corresponding to at least the maximum charging voltage of the charger at defined time intervals for a defined self-test time period for performing a self-test. A check determines whether a short circuit or defect is formed at the power electronics unit of the charging terminal. When it is established that no short circuit or defect is formed, the charging terminal is enabled for charging a vehicle. When it is established that a short circuit or defect is formed, the charging terminal is blocked for charging a vehicle. The power electronics unit may be subjected to a self-test voltage which is greater than the maximum charging voltage of the charger. When a vehicle is being connected to the charging terminal during performance of a self-test, the self-test may be terminated.
Method and control device for operating a charger for electrically driven vehicles and charger
21.02.2024
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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