Electric automobile and active bleeding system used for electric automobile

Abstract

The invention provides an active bleeding system used for an electric automobile. The active bleeding system comprises a power battery, a bus capacitor, a charging and discharging socket, a bidirectional DC / DC (direct current to direct current) module, a drive control switch, a bidirectional DC / AC (direct current to alternating current) module, a motor control switch, a charging and discharging control module and a controller module, wherein the controller module is connected with the drive control switch, the motor control switch and the charging and discharging control module, and is used for controlling the drive control switch, the motor control switch and the charging and discharging control module according to the current working mode of the active bleeding system. The active bleeding system can be used for carrying out high-power alternating current charging on an electric automobile by using a civil or industrial alternating current power grid, so that a user can charge efficiently and quickly anytime and anywhere, the working voltage range for the battery is wide, and space and cost can be saved. The invention also provides the electric automobile.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an active discharge system for electric vehicles and an electric vehicle with the active discharge 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, high mileage and fast charging technology have become a major issue in the promotion of electric vehicles. problem. [0003] At present, most electric vehicles use large-capacity batteries. Although the battery life of electric vehicles can be improved, the same large-capacity batteries also bring about the problem of long charging time. Although professional DC charging stations can quickly charge batteries, the high cost and large footprint make it difficult to popularize such infrastructure...

AI Technical Summary

Problems solved by technology

[0005] Option (1): If figure 1 and figure 2 As shown, the on-board charging and discharging device in this scheme mainly includes a three-phase power transformer 1', a three-phase bridge circuit 2' composed of six thyristor elements, a constant voltage control device AUR and a constant current control device ACR, but this scheme is seriously wasteful space and cost

[0006] Option (2): If image 3 As shown, the on-board charging and discharging device in this scheme installs two charging sockets 15' and 16' to adapt to single-phase / three-phase charging, which increases the cost; the motor drive circuit includes a filter module composed of inductor L1' and capacitor C1', When the motor is driven, the three-phase current passes through the filter module to generate loss, which is a waste of battery power; the inverter 13' rectifies / inverts the alternating current during charging and discharging in this scheme, and the voltage cannot be adjusted after rectification / inversion, which is applicable The battery operating voltage range is narrow

[0007] To sum up, most of the current AC charging technologies on the market use a single charging technology. This technology has low charging power, long charging time, large hardware size, single function, and is limited by the voltage level of power grids in different regions. shortcoming

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