An electric vehicle intelligent vehicle thermal management system and method thereof

Abstract

The invention discloses an electric vehicle intelligent complete heat management system and a method thereof. The electric vehicle intelligent complete heat management system comprises a vehicle head heat exchanger, a passenger compartment heat exchanger, a motor, an electric control system, a motor water pump, a four-way reversing valve, a compressor, an electromagnetic valve, two three-way ball valves, an evaporator, a water pump, a battery pack, a heat tube, and a battery heat exchanger. According to the electric vehicle intelligent complete heat management system, the heat of three heat management systems, namely an air conditioner system, a motor electric control system and a battery pack heat management system, of the complete vehicle can be fully mutually utilized, thereby reducing the requirement of heat dissipation and heating on energy of the batteries; temperature balance of each battery monomer can be ensured; the motor electric control system is subjected to heat dissipation by utilizing a liquid cooling manner and is coupled with a condenser, so that energy consumption of the whole heat management system is reduced by fully utilizing an outside cold source; and on the premise of ensuring the driving and riding comfortableness, the driving range is prolonged as longer as possible, the service life of the battery system is prolonged, and the use costs of an electric vehicle battery system are reduced.

Description

technical field [0001] The invention belongs to the field of heat management of electric vehicles, and in particular relates to an intelligent electric vehicle heat management system and a method thereof, which are suitable for the heat management of the whole electric vehicle during driving. technical background [0002] Electric vehicles use battery packs as the power source and motors to drive the wheels. Compared with traditional vehicles, electric vehicles have much less impact on the environment and have good development prospects. However, at present, many technologies of electric vehicles are not yet mature, especially the current low battery capacity cannot meet the cruising range, so many manufacturers have sacrificed driving comfort in order to extend the cruising range as much as possible. The heat dissipation (heating) requirements of electric vehicles cannot be met during high-power operation, resulting in insufficient heat dissipation (heating) of the battery,...

AI Technical Summary

Problems solved by technology

The battery pack, especially the lithium battery pack, is more sensitive to the temperature of the working environment. When the temperature is high, the aging speed of the battery material will be accelerated, and the cycle life will rapidly decay; when the temperature is low, the charge and discharge capacity of the battery will decrease. The battery will be subject to irreversible capacity attenuation; although the temperature range of the motor and motor drive thermal management system is relatively large, the service life of the motor rotor will be greatly shortened if the temperature is too high, especially under high-power conditions. It is necessary to carry out forced heat dissipation; and the operation of the air conditioning system directly affects the comfort of drivers and passengers, which in turn affects the public's willingness to purchase

Not getting the power to run the compressor from the internal combustion engine would drain a lot of battery power

[0005] At present, most of the passenger cabin and battery pack heating systems are PTC electric heating, which has low power conversion efficiency and serious waste of power

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