Battery thermal management system based on pulsating heat pipe and phase change material coupling

Abstract

A battery thermal management system based on pulsating heat pipe and phase change material coupling utilizes high latent heat of a phase change material to improve heat storage capacity, adopts the pulsating heat pipe to improve heat conductivity of the phase change material, and improves heat transfer rate and temperature uniformity of a power battery. A battery accommodating groove and a heat pipe fixing groove are adopted to prevent the battery and the pulsating heat pipe from vibrating and shifting, so that the safety is improved; heat conduction interface material layers are arranged on the contact surfaces of the heat exchange grooves, the single batteries and the pulsating heat pipe walls, so that the heat transfer efficiency is improved; a heat management control system is adopted, natural wind formed by the vehicle speed in the vehicle running process is introduced into the system under most working conditions, heat dissipation is conducted in a passive cooling mode, the heat transfer efficiency is high, and the energy saving performance is high; and when the temperature of the battery is in a high-temperature working condition, the active cooling equipment is started through the thermal management control system for heat dissipation, and when the temperature of the battery is in a low-temperature working condition, the PTC heating device is started for heating, so that the performance reliability of the battery is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to a battery thermal management system based on the coupling of a pulsating heat pipe and a phase change material, and belongs to the technical field of battery thermal management. Background technique [0002] In order to achieve my country's strategic goal of carbon neutrality, the country vigorously develops electric vehicles and promotes zero-emission transportation. The performance and quality of an electric vehicle largely depend on the performance of its power battery, especially the reliability and cycle life of the battery. [0003] The temperature of the power battery itself and the uniformity of the internal temperature have a great impact on the reliability and life of the battery. During the daily charge and discharge process, the battery needs to be kept in an appropriate temperature range to prevent thermal runaway; in addition, during the operation of the vehicle , Due to the vibration and shock of the road surfac...

AI Technical Summary

Problems solved by technology

[0003] The temperature of the power battery itself and the uniformity of the internal temperature have a great impact on the reliability and life of the battery. During the daily charge and discharge process, the battery needs to be kept in an appropriate temperature range to prevent thermal runaway; in addition, during the operation of the vehicle Due to the vibration and shock of the road surface, the start-stop or acceleration of the vehicle and the shock during the operation of the pulsating heat pipe, the displacement of the single battery may be caused, and in severe cases, the battery may collide and cause a safety accident

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