Battery box thermal management system in consideration of heat recovery and control method thereof

Abstract

The invention discloses a battery box thermal management system in consideration of heat recovery and a control method thereof, and relates to a battery box thermal management system. The system includes a battery box heat dissipation structure module and a control module. The battery box heat dissipation structure module includes a liquid-cooling thermal management device and an air-cooling thermal management device. The liquid-cooling thermal management device includes multiple heat dissipation structure liquid-cooling plates. The air-cooling thermal management device includes a fan with a curved flow deflector. The control method comprises detecting a battery surface temperature; determining a temperature range of the battery surface by a controller; sending instructions to a corresponding execution unit; and preheating or cooling the battery module. The battery box thermal management system and the control method thereof can effectively control the temperature of a power battery, improve the consistency of the temperature of the battery box, and recover the generated heat to provide power for an air-cooling device.

Description

technical field [0001] The invention relates to the technical field of a battery box thermal management system, in particular to an energy-saving and efficient battery box thermal management system considering heat recovery and a control method thereof. Background technique [0002] Exhaust gas from traditional automobiles continues to aggravate environmental pollution. Motor vehicles have become the largest source of air pollutants in many large cities, and resource and environmental problems caused by automobiles have become increasingly severe. It is imminent to solve resource and environmental problems. The development of new energy vehicles is an important solution. It can not only reduce vehicle exhaust emissions, but also reduce the use of non-renewable resources such as petroleum. Electric vehicles have gradually become the research and development focus of many car companies and scientific research institutions. The government has also formulated a series of policie...

AI Technical Summary

Problems solved by technology

The most suitable charging and discharging temperature of the battery is between 20°C and 45°C. At low temperature, the internal resistance of the lithium-ion battery increases, the capacity decreases, and the working efficiency decreases.

If the temperature is too high, the battery will produce electrode degradation and electrolyte decomposition, which will accelerate its aging process

At an ambient temperature of 60°C, the number of discharge cycles of lithium-ion batteries is significantly shortened, and the aging is serious

However, the heat dissipation effect of the existing battery thermal management system is not ideal, and heat recovery is not considered

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