Electric vehicle battery heat dissipation and temperature control system and method based on liquid-gas phase change heat storage

Abstract

The invention discloses an electric vehicle battery heat dissipation and temperature control system and method based on liquid-gas phase change heat storage. The system comprises: a phase change evaporative cooling circulation system, a heating system and a control system. The phase change evaporative cooling circulation system includes a liquid reservoir, an adsorption phase change evaporative cooling device, a communicating pipe, a gas supply pipeline, a one-way valve, a steam drum, a condensing pipeline, an electromagnetic valve, an electric throttle valve, a condenser, a reflux pipeline, and a cooling fan. The heating system includes an adsorption phase change evaporative cooling device and a heater. The control system includes: a controller, a temperature sensor, a heat flux density sensor and a pressure sensor. The system and method provided by the invention have the beneficial effects that: through real-time monitoring of the temperature of the adsorption phase change evaporative cooling device, the heat flux density and the steam drum pressure by the control system, the working temperature and temperature difference of the power battery are effectively controlled, and the thermal reliability and working life of the power battery are improved.

Description

technical field [0001] The present invention relates to the technical field of uniform heat dissipation system for power batteries of electric vehicles, in particular, to a heat dissipation and temperature control system and method for electric vehicle batteries based on liquid-gas phase change heat storage. Background technique [0002] According to statistics, motor vehicle exhaust emissions have become the main source of environmental pollution. In 2016, the number of motor vehicles in the country reached 295 million, and the preliminary calculation of motor vehicle emissions was 44.725 million tons. Motor vehicle exhaust emissions have become the most important source of PM2.5 . Therefore, the development of low-pollution new energy vehicles to replace traditional fuel vehicles has become an important way to solve vehicle exhaust pollution and a new trend in the future development of the automotive industry. Among them, electric vehicles are the mainstream trend in the ...

AI Technical Summary

Problems solved by technology

Compared with the liquid cooling method, the air cooling method has the advantages of simple structure, low cost and high application degree, but its heat transfer coefficient and heat transfer rate are lower than the liquid cooling method

The advantage of the phase change material cooling method is that the phase change potential is large, and the disadvantage is that the thermal conductivity is low, the active temperature control performance is poor, and the design is difficult

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