Vehicle charging and emergency power supply system based on electric vehicle and control method thereof

Abstract

The present invention discloses a vehicle charging and emergency power supply system based on an electric vehicle and a control method thereof. The vehicle charging and emergency power supply system comprises a power battery and a charging loop, and furthermore comprises the components of: a control unit, an emergency signal triggering module, a socket current detecting module, a battery electric-amount acquiring module, a discharging loop, a first relay, a second relay, a third relay and a fourth relay; wherein the emergency signal triggering module, the socket current detecting module, the battery electric-amount acquiring module, the discharging loop, the first relay, the second relay, the third relay and the fourth relay are respectively connected with the control unit. The control unit is furthermore connected with the charging loop. The power battery is connected with the input end of the discharging loop through the third relay. The output end of the discharging loop is connected with an electric vehicle socket through the first relay. The electric vehicle socket is connected with the input end of the charging loop through the second relay. The output end of the charging loop is connected with the power battery through the fourth relay. The control unit controls action of the first relay, the second relay, the third relay and the fourth relay and operation states of the charging loop and the discharging loop according to an acquired signal. The vehicle charging and emergency power supply system based on the electric vehicle and the control method thereof have functions of: widening use function of the electric vehicle, and improving applicability of the electric vehicle.

Description

Technical field [0001] The invention belongs to power electronics technology, and particularly relates to an electric vehicle-based on-board charging and emergency power supply system and control method. Background technique [0002] With the approaching global energy crisis, energy-saving and environmentally-friendly new energy electric vehicles have gradually entered people's lives and become a trend in future life. The power battery of electric vehicles can be charged in vehicle-mounted and off-vehicle charging modes. The vehicle-mounted charging equipment moves with the car and is flexible in use. It can be charged in any place with city electricity, which greatly facilitates people's electric The demand for car charging. [0003] The traditional on-board charger converts city electricity into direct current to charge the power battery. The function is relatively single, which makes the functions of electric vehicles have certain limitations. Summary of the invention [0004] ...

AI Technical Summary

Problems solved by technology

[0003] The traditional on-board charger converts the mains electricity into direct current to charge the power battery. The function is relatively single, which makes the functions of electric vehicles have certain limitations.

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