Hybrid power system for electric car
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The invention discloses a hybrid power system for an electric car. The hybrid power system comprises a power battery, a supercapacitor, a first DC/DC converter, an engine-generator set, an AC/DC converter, a protective resistor, a second DC/DC converter, a power system bus and a hybrid power system controller. The power system bus is connected with a load. The engine-generator set is connected to the power system bus through the AC/DC converter, the power battery is directly connected to the power system bus, the supercapacitor is connected to the power system bus through the first DC/DC converter, the protective resistor is connected to the power system bus through the second DC/DC converter 7, and the hybrid power system controller outputs drive signals of the AC/DC converter, the first DC/DC converter and the second DC/DC converter to control the engine-generator set, the supercapacitor and the protective resistor. According to the hybrid power system, the service life of the power battery is prolonged.