Vehicle-to-vehicle charging system and control method thereof

Abstract

The invention provides a vehicle-to-vehicle charging system and method. The vehicle-to-vehicle charging system comprises a charging connection device, a charging vehicle and a discharging vehicle provided with a range extender. Power is generated through the range extender carried by the discharging vehicle, three-phase alternating current is converted into direct current through the inverter, the direct current is directly transmitted to the charging vehicle through a direct current charging port and a charging connecting device, and the charging device has advantages of being high in charging speed and charging efficiency and not limited by the electric quantity of a power battery of the discharging vehicle; the charging and discharging vehicles do not need to be additionally provided with other hardware systems, so the technical scheme can be realized on the basis of not additionally increasing the vehicle cost, and the market rescue response capability and the vehicle use experience of customers are greatly improved.

Description

technical field [0001] The invention relates to the technical field of external charging for new energy vehicles, in particular to a vehicle-to-vehicle charging system and control method. Background technique [0002] At present, the energy crisis and environmental degradation have become important factors restricting the development of the global economy. Research on energy-saving and environmentally friendly new energy vehicles is one of the effective means to relieve energy pressure and reduce environmental pollution. New energy vehicles have long been listed as national strategic emerging vehicles. industry. In recent years, my country's new energy vehicles have shown an explosive growth trend. Looking forward to the development vision of the "New Energy Vehicle Industry Development Plan (2021-2035)", by 2025, the sales of new energy vehicles will reach the total sales volume of new vehicles. About 20%. Under the general environment of industrial development, pure electr...

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Problems solved by technology

[0005] For example, the patent application number is 201720999147.5, which is called "a new energy vehicle vehicle-to-vehicle charging system" and the patent application number is 201810260158.0, which is named "a device and method for vehicle-to-vehicle charging". Vehicle-to-vehicle charging solution, but its technical solution has the following disadvantages: 1. Vehicle-to-vehicle rescue, the rescue capability is limited by the power battery power of the discharged vehicle itself, and there is a risk that the rescue vehicle will break down again after charging the broken down vehicle. Rescue scenarios are relatively limited; 2. The existing technical solutions all use DC to AC, AC to DC charging and discharging schemes, which have the problems of low power conversion efficiency and slow charging rate

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