Electric vehicle and power supply circuit thereof

According to the electric vehicle and the power supply circuit thereof, a wireless charging and discharging unit and a wired charging and discharging unit in the power supply circuit multiplex a parameter-adjustable circuit, so that the parameter-adjustable circuit can be adjusted in a wired charging and discharging mode and a wireless charging and discharging mode; the wired charging and discharging unit and the wireless charging and discharging unit both adopt parameter-adjustable circuits, so that the conversion of the resonant frequency of the power supply circuit can be realized, and the reuse rate of devices in the power supply circuit is improved. And the control unit in the power supply circuit can adjust the resonance parameter of the parameter adjustable circuit, so that the resonance frequency of the power supply circuit is the same as the preset frequency in the current charging and discharging mode, the dynamic adjustment of the resonance frequency of the power supply circuit is realized, the opt