Discharge system for electric automobile

Abstract

The invention discloses a discharge system for an electric automobile. The discharge system comprises a power battery, a charging / discharging socket, a two-way DC / DC (direct current / direct current) module, a two-way DC / AC (direct current / alternating current) module, a charging / discharging control module and a controller module, wherein the charging / discharging socket is connected with a power net to realize the grid-connected discharging of the power battery; one end of the charging / discharging control module is connected with the alternating current end of the two-way DC / AC module, and the other end of the charging / discharging control module is connected with the charging / discharging socket; and the controller module is connected with the charging / discharging control module, and the controller module is used for controlling the charging / discharging control module according to the current work model of a power system. According to embodiments of the invention, the grid-connected discharging of the power net can be realized, so that the functions of the electric automobile can be enriched, and the electric automobile can meet the specific work requirement.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a discharge system for electric automobiles. 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. At the same time, due to the limited space of vehicle...

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

Moreover, the current electric vehicles can only realize the charging function, and the function is very single, which cannot meet the needs of some complex scenarios, such as first aid, disaster rescue, etc.

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