Intelligentized multi-loop thermal management system of electric automobile

Abstract

The invention relates to an intelligentized multi-loop thermal management system of an electric automobile. The intelligentized multi-loop thermal management system comprises a power battery pack, a driving motor, a motor controller, a vehicle-mounted electric-charger, a DC / DC transducer, a battery radiator, a battery refrigerator, a motor radiator, a motor water pump, a motor oil pump, an expansion water tank, a PTC heater, a heat exchanger, a motor compressor, a condenser, a liquid storage drying kettle, an evaporator, a electric expansion valve and a heater core body. By interconnection between a direct-through valve, a three-direction valve and a four-way valve, a plurality of heat management controlling circuit is formed. Compare with the existing technology, the intelligentized multi-loop thermal management system forms a plurality of circuits which can meet different cooling or heating requirements. According to the power battery pack of the electric automobile, a electric-driving module and air-condition character and working status of passenger compartments, the circuits are selectively opened or closed, temperature balancing and high-efficiency run of the electric automobile are guaranteed, system energy is saved significantly, endurance mileage of the electric automobile is prolonged, and economy of automobiles is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to an intelligent multi-circuit electric vehicle thermal management system. Background technique [0002] As countries around the world pay more and more attention to environmental pollution and oil and other energy consumption issues, the development prospects of electric vehicles are generally optimistic, and their production and sales are increasing year by year. It is expected to completely replace traditional fuel vehicles in the future. Compared with traditional cars, electric vehicles have no exhaust emissions and are very friendly to the environment. However, there are still some development bottlenecks for electric vehicles at this stage. Their charging time is longer, and their full-charge mileage has no advantage compared with traditional cars. In order to reduce the gap with conventional vehicles in cruising range, electric vehicles are required to ...

AI Technical Summary

Problems solved by technology

Most of the electric vehicles currently on the market do not have significant energy-saving thermal management systems, and the air-conditioning system, power battery pack cooling system, and electric drive module cooling system are either not related to each other, or the correlation is not enough; when the power battery pack When cooling, usually either rely too much on the air conditioner for cooling, or rely on adding a battery radiator in front of the condenser for cooling, which will not only have a negative impact on the performance of the air conditioner and the heat dissipation effect of the electric drive system, but also lead to the efficiency of the front-end module. reduce, and will increase the wind resistance of the vehicle, making the power and economy of the vehicle worse

When the power battery and the passenger compartment need to be heated, they usually rely too much on the PTC heater, resulting in a shorter cruising range of the vehicle

[0003] Chinese patent CN 205768485 U discloses an electric vehicle intelligent thermal management system, which consists of a front heat exchanger, a passenger compartment heat exchanger, a TV, an electric control system, a drive motor water pump, a four-way reversing valve, a compressor, an electromagnetic It is composed of two three-way ball valves, evaporator, water pump, battery handle, heat pipe, and battery heat exchanger, so that the heat energy of the three major thermal management systems of the vehicle's air conditioning system, drive motor electronic control system, and battery pack thermal management system Fully utilize each other, reduce the demand for heat dissipation and heating on battery energy, ensure the temperature balance between each battery cell, prolong the cruising range and the service life of the battery system, but the control loop formed by this system is relatively small, and the system cannot be effectively used. The function of each part in

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