Electric vehicle and charging control system thereof

Abstract

The invention discloses an electric vehicle and a charging control system thereof. The charging control system comprises a power battery, an alternating current charging socket, a direct current charging socket, a bidirectional DC / AC converter, and a driving motor, a stator winding of the driving motor is connected with the alternating current end of the bidirectional DC / AC converter through a motor control circuit, the stator winding is in star connection, and a star connection point is connected with one input port of the direct current charging socket through a direct current control switch; and the charging control system further comprises a controller which is used for obtaining the current working mode of the power system of the electric vehicle and controlling the charging and discharging control circuit, the motor control circuit and the direct current control switch according to the working mode. According to the system, the driving motor, the motor control circuit and the alternating current and direct current control switches are integrated and controlled according to the working mode of the electric vehicle power system, the three charging modes of direct current, single-phase alternating current and three-phase alternating current can be compatible, the integration degree is high, the charging power can be improved, and the charging time can be shortened.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an electric vehicle charging control system and an electric vehicle. Background technique [0002] At present, the bidirectional inverter charging and discharging motor controller (VTOG controller) has the functions of single-phase and three-phase AC charging and driving the motor. When charging, the motor contactor is disconnected, and the AC single-phase or closed AC is selected according to the grid power supply system. The three-phase charging contactor also determines whether the working mode of the DC / AC converter is boosted. When driving, the motor contactor is closed and the AC contactor is disconnected. Its characteristic is that AC charging can adapt to single-phase and three-phase charging; charging and driving share the IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) three-phase inverter bridge, which improves the hardware utilization r...

AI Technical Summary

Problems solved by technology

[0004] 1. The integration level is low, and the reuse rate of hardware (drive motor, DC / AC converter, contactor) is low;

[0005] 2. The charging power is small and the charging time is long. Restricted by the national standard, the AC input power of the single-phase charging port does not exceed 43.47KW (230*63*3 / 1000)

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