Extended-range electric vehicle and control method thereof

Abstract

The invention discloses an extended-range electric vehicle which comprises a driving system which comprises a motor A serving as a driving motor and wheels coaxially connected with the motor A; the battery system is electrically connected with the motor A; the energy recovery system comprises an electric control clutch, an air compression pump A and a high-pressure gas cylinder; the range extender comprises a micro gas turbine and a generator which are connected with each other; the heat management system comprises a refrigerating system, a heating system, a heat exchange medium circulating system, a refrigerating fan and a heating fan. The invention further discloses a control method of the electric vehicle. Cooling is achieved through the refrigerating machine, the efficiency is high, and the electric quantity of a battery system and the endurance mileage do not need to be considered; heating/refrigerating is achieved through waste heat of the micro gas turbine, meanwhile, the high-pressure gas cylinder serves as an energy balancer, braking energy of the extended-range electric vehicle is recycled, peak load shifting of energy of the whole vehicle is achieved, and the energy utilization rate is increased while environmental protection and energy saving are achieved.

Description

technical field [0001] The invention relates to an extended-range electric vehicle and a control method thereof, belonging to the technical field of vehicles. Background technique [0002] With the deterioration of the global environment and air quality, more and more people realize the importance of environmental protection. Traditional fuel vehicles have low utilization rate of energy, low efficiency, and greater harm to the environment. Therefore, as new energy vehicles, extended-range electric vehicles are becoming more and more popular due to many objective factors. [0003] In the prior art, range-extended electric vehicles mainly involve three situations: the first one uses the internal combustion engine as a range extender, that is, the internal combustion engine is used to drive the generator to generate electricity to charge the battery; the second one uses the free-piston expander-linear power generation The engine is used as a range extender, which uses compress...

AI Technical Summary

Problems solved by technology

However, air cooling has the following disadvantages: 1. Air cooling generally connects the coolant to the air intake grille, and cools the coolant through the intake air of the vehicle during driving, thereby cooling the battery pack. This cooling is greatly increased. It reduces the resistance during the driving process of the vehicle, increases the consumption of electric energy of the vehicle, and the air intake grille will also cool down the battery in winter; 2. When the temperature of the surrounding environment is greater than 40°C, the battery pack cannot be cooled by extracting the ambient air. When the temperature of the surrounding environment is lower than 0°C, the battery pack needs to be heated, so when the electric vehicle is running in high temperature (air temperature greater than 40°C) or low temperature (air temperature is less than 0°C) climate conditions, air cooling cannot Meeting battery pack cooling and heating needs

This reduces the battery capacity and is not conducive to the lightweight of electric vehicles

4. The main component of the coolant of ordinary electric vehicles is mostly water (water has the largest specific heat capacity), and when the temperature of the cooling water is low, it is easy to frost and freeze, which will not only affect the performance of the system, but also affect the driver. safety

This solution cannot make timely and effective use of the excess electric energy output by the generator when the battery is fully charged

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