Electric vehicle and power system and motor controller for electric vehicle

Abstract

The invention provides a power system for an electric vehicle. The power system comprises a power battery, a charging / discharging socket, a three-level bidirectional DC / AC module, a motor control switch, a charging / discharging control module and a controller module, wherein a first direct-current end of the three-level bidirectional DC / AC module is connected with one end of the power battery, and a second direct-current end of the three-level bidirectional DC / AC module is connected with the other end of the power battery; and the controller module is respectively connected with the motor control switch and the charging / discharging control module, and is used for controlling the motor control switch and the charging / discharging control module according to a present working mode of the power system. The power system adopts the three-level control, reduces a DC-DC module, can realize high-power charging, reduces the busbar voltage, and is high in efficiency and short in charging time. The invention further provides an electric vehicle and a motor controller.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a power system and a motor controller for the electric vehicle and an electric vehicle with the power system. Background technique [0002] With the development of science and technology, environmentally friendly and energy-saving electric vehicles are playing the role of replacing fuel vehicles. However, the popularization of electric vehicles still faces some problems. Among them, fast, convenient and efficient charging technology has become a major problem in the promotion of electric vehicles. [0003] At present, in the existing electric vehicle charging methods, the AC charging method is generally a low-power charging method such as 3.3KW, 7KW, 30KW, etc., while the high-power charging method is a DC charging method. However, DC charging stations have brought charging time too long, and problems such as high cost and large footprint make the popularization of this...

AI Technical Summary

Problems solved by technology

However, DC charging stations have brought charging time too long, and problems such as high cost and large footprint make the popularization of this infrastructure still face certain difficulties. At the same time, due to the limited space of vehicles, on-board charging The charger is limited by the size and cannot meet the charging power

[0004] Currently on the market, charging devices with DC / DC modules are usually used to charge electric vehicles. However, due to the existence of DC / DC modules, the charging efficiency is low and the charging time is long, so it cannot meet the needs of fast charging of electric vehicles.

Images