Power battery pack active air cooling heat radiating system for vehicle and control method thereof

Abstract

The invention discloses a power battery pack active air cooling heat radiating system for a vehicle, which is to realize that the heat radiating system changes with different states of a power battery in real time and the risk of over-high temperature of the battery pack is greatly reduced. The power battery pack active air cooling heat radiating system for the vehicle comprises a passenger compartment air conditioning system, a power battery pack cooling pipeline, an air duct system and a control system, wherein the power battery pack cooling pipeline comprises a No. 2 solenoid valve, a No. 2 electronic expansion valve, a No. 2 evaporator, a No. 2 evaporating pressure regulating valve and a No. 2 one-way valve, which are connected between an outlet of a condenser and an inlet of a liquid storage tank in sequence to form cooling liquid circulation outside the passenger compartment air conditioning system. An inlet of the air duct system is respectively connected with the No. 2 evaporator and an interior passenger compartment; an outlet of the air duct system is connected with a power battery box; and the control system comprises a battery management system, an air conditioning control unit and a heat radiating system control unit, which communicate with a vehicle control unit through CAN buses. The invention further discloses a control method for the power battery pack active air cooling heat radiating system for the vehicle.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an active air-cooled heat dissipation system for a vehicle power battery pack and a control method thereof. Background technique [0002] According to relevant research, the charge and discharge rate, the SOC state of the power battery, and the ambient temperature all have varying degrees of influence on the internal resistance of the power battery, which in turn affects the temperature rise rate. In southern my country, the summer temperature can reach 35 degrees above zero or even higher. Under this condition, the heat dissipation capacity of the battery is poor, so it is necessary to quickly dissipate heat from the battery in order to reach the ideal operating temperature and avoid adverse consequences caused by overheating of the battery pack. Therefore, according to the different working conditions of the power battery, different heat dissipation strategies need to be adopted...

AI Technical Summary

Problems solved by technology

[0006] At present, the heat dissipation system of the power battery can only achieve a fixed heat dissipation effect, and cannot change in real time according to the working state and physical state of the power battery. Once the temperature of the power battery diverges, it cannot be cooled in time, so the heat dissipation effect is poor.

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