The invention provides a high-voltage direct-current charging circuit and method for an electric vehicle. The charging circuit comprises a power supply; a motor controller which comprises a first phase, a second phase and a third phase; a motor which comprises a first winding, a second winding and a third winding; a switch element K1 in which one end of is connected between the first winding and the first phase in parallel, and the other end is externally connected to a direct current charging seat; and an interface capacitor C2 in which one end is connected with the switch element K1, and the other end of the interface capacitor C2 is connected to the charging circuit. When a direct-current charging seat outputs low-voltage direct current to the charging circuit, the switching element K1 is closed, the first phase is disconnected, and the second phase and the third phase are closed, so that the second phase and the third phase serve as switching bridge arms of a booster circuit of the charging circuit, and the low-voltage direct current is boosted to high-voltage direct current. After the technical scheme is adopted, a driving inverter is used as a DC-DC circuit of the power conversion circuit, so that the 400V direct-current quick charging pile can be directly applied to direct-current quick charging of an electric automobile with an 800V high-voltage bus system.
本发明提供了一种电动汽车高压直流充电电路及充电方法,充电电路包括电源;电机控制器,包括第一相、第二相、第三相;电机,包括第一绕组、第二绕组及第三绕组;开关元件K1,一端并接在第一绕组和第一相间,另一端外连至一直流充电座;接口电容C2,一端与开关元件K1连接,另一端连接在充电电路上;当直流充电座向充电电路输出低压直流电时,开关元件K1闭合,第一相断开,第二相、第三相闭合,使得第二相、第三相用作为充电电路的升压电路的开关桥臂,对低压直流电升压至高压直流电。采用上述技术方案后,使用驱动逆变器作为功率变换电路的DCDC电路,使400V直流快速充电桩可直接应用于具有800V高压母线系统的电动汽车直流快速充电。
High-voltage direct-current charging circuit and method for electric vehicle
一种电动汽车高压直流充电电路及充电方法
2021-12-10
Patent
Electronic Resource
Chinese
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