Novel phase-change cooling and heating integrated structure for power batteries

Abstract

The invention discloses a novel phase-change cooling and heating integrated structure for power batteries. The novel phase-change cooling and heating integrated structure comprises power battery module fixtures, a temperature sensor and a control unit. Blowup aluminum uniform heating plates are closely arranged in gaps in two sides of each cylindrical power battery, the cylindrical power batteriesare longitudinally arrayed, the shapes of the blowup aluminum uniform heating plates are matched with the outer contours of cylindrical cells, the blowup aluminum uniform heating plates are in clinging contact with curved surfaces of the various cylindrical power batteries, blowup aluminum uniform heating slabs and heat exchange copper flat pipes are sequentially arranged at the tops and the bottoms of power battery modules in an overlaid manner, the corresponding blowup aluminum uniform heating slabs and the corresponding heat exchange copper flat pipes are in heat transfer contact with heatconduction planes at two ends of each blowup aluminum uniform heating plate, and heating films wrap the heat exchange copper flat pipes positioned at the bottoms of the power battery modules. The novel phase-change cooling and heating integrated structure has the advantages that heat can be efficiently dissipated for power battery packs under diversified charge and discharge working conditions, or the power battery packs can be efficiently heated under the various charge and discharge working conditions, the temperatures of the cells can be controlled, temperature difference between the different cells can be effectively reduced, accordingly, the integral power battery packs can work in reasonable temperature ranges, and heat of the cylindrical power battery modules which are densely arranged can be effectively managed.

Description

Technical field [0001] The invention relates to a power battery thermal management system used in an electric vehicle, in particular to a novel phase change cooling and heating integrated structure of a power battery. technical background [0002] With the increasing energy crisis and environmental pollution, the replacement of traditional engine cars by new energy vehicles has become an inevitable trend in the development of the automobile industry in all countries in the world today. More importantly, in the current development of various new energy vehicle technologies and products, electric vehicles have become the main force in future development. The lithium-ion battery is regarded as an ideal power source for electric vehicles due to its excellent performance. During the use of lithium-ion batteries, heat accumulation and temperature rise will accelerate the attenuation of battery life. In addition, the phenomenon of battery charging and over-discharging causes the incon...

AI Technical Summary

Problems solved by technology

However, the current common heat pipes, such as copper water heat pipes and aluminum flat heat pipes, are difficult to be directly applied in cylindrical power battery modules

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