A charging circuit for an electric vehicle (EV) includes: first and second impedance adjustable circuits 301, 302 connected in series; a high-voltage (HV) relay K3; and a controller. The charging circuit prevents an electric shock due to a high voltage without the addition of components. A first end of the first and second impedance circuits is connected to a positive terminal of a power battery B. A second end of the first and second impedance circuits is connected to a negative terminal of the power battery. The first end of the first and second impedance circuits is further connected to a first end of a switch for a HV relay. A second end of the switch for the HV relay is connected to a DC positive pole interface. The second end of the first and second impedance circuits is further connected to a DC negative pole interface. A common end of the first and second impedance circuits is connected to a DC ground interface. The controller adjusts an impedance ratio of the first impedance adjustable circuit to the second impedance adjustable circuit when the switch for the HV relay is switched off, such that a voltage between the DC negative pole interface and the DC ground interface is set to be lower than a preset threshold value.
Charging circuit of electric vehicle and electric vehicle
2024-02-21
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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