Power battery composite heat management system and method thereof

Abstract

The invention discloses a power battery composite heat management system and a method thereof. The power battery composite heat management system comprises a water tank filled with a circulating fluid, a circulating pump, a sealing cover plate of the water tank, and a battery pack array which is fixedly mounted above the sealing cover plate and is composed of a plurality of battery cells, wherein a temperature equalizing plate and a heat pipe are adhered onto the surface of each battery cell respectively, and cooing sections of the heat pipes pass through the sealing cover plate to be arranged in the circulating fluid in the water tank; a circulating fluid inlet is formed in one side end of the water tank, a circulating fluid outlet is formed in the other side end of the water tank, and a circulating fluid turbulent flow structure is arranged inside the water tank, so that the circulating fluid flows into the circulating fluid outlet from the circulating fluid inlet of the water tank in a curve flowing manner. The system and the method thereof can solve the technical problems such as heat dissipation, battery pack temperature difference reduction, battery preheating and heat cyclic utilization under different working conditions of batteries; and meanwhile, the system is compact and simple in structure and convenient in installation and maintenance, accords with the development tendency of battery heat management systems and electric automobiles, and has good application prospects.

Description

technical field [0001] The invention relates to a power battery protection device, in particular to a power battery composite heat management system and a method thereof. Background technique [0002] As energy issues and environmental pollution issues become more and more prominent, human beings' demand for environmental protection and energy saving is becoming stronger and stronger. Electric vehicles and hybrid vehicles driven by power batteries will surely become the mainstream of the automotive industry. my country has announced a series of favorable policies to promote the research and development of new energy vehicles, and achieved certain results. However, the power battery, the core component of an electric vehicle, generates a large amount of heat during charging and discharging, causing the battery temperature to rise. High temperature causes battery performance to degrade or even explode, and the battery temperature is too low to work in a low temperature enviro...

AI Technical Summary

Problems solved by technology

[0003] At present, the thermal management technologies that have been applied include air cooling and liquid cooling, but both of them have insurmountable deficiencies, such as the low thermal conductivity of air, and the sealing and overweight of liquid cooling.

Although the thermal management technology based on phase change material cooling has certain advantages, the phase change material has poor thermal conductivity and low heat storage rate.

In addition, most current thermal management system designs do not consider the recycling of heat

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