Lithium ion battery module thermal management system based on phase change material- fin composite structure

Abstract

The present invention discloses a lithium ion battery module thermal management system based on a phase change material- fin composite structure, pertaining to the field of lithium ion battery thermalmanagement systems. The system comprises an aluminum battery box, and a plurality of square ferric phosphate lithium battery modules and heat-dissipation structures are fixed in the aluminum batterybox, wherein the square ferric phosphate lithium battery modules and heat-dissipation structures are alternately arranged. The upper surface of each ferric phosphate lithium battery module is fixed with ferric phosphate lithium battery tabs. Each heat-dissipation structure consists of a pair of substrates and a plurality of heat-dissipation fins, wherein the heat-dissipation fins are arranged between a pair of substrates, and each two adjacent heat-dissipation fins are filled with a phase change material. According to the thermal management system, the disadvantages of the conventional thermalmanagement system, such as small heat transfer area, low phase change material thermal conductivity and low heat transfer efficiency between the phase change materials and the batteries, are overcome; and the heat conduction and the thermal convection of the phase change materials are improved via the fin structures, so that the battery heating rate is lowered, the battery module temperature gradient is reduced, and the safety, the working performance and the durability of the batteries are improved.

Description

Technical field [0001] The invention relates to the field of lithium-ion battery thermal management systems, in particular to a lithium-ion battery module thermal management system based on a phase change material-fin composite structure. Background technique [0002] Under the pressure of greenhouse gas and energy shortages, it is becoming more and more important to promote the electrification of the transportation industry to solve the air pollution caused by petroleum and fossil fuels. Therefore, electric vehicles have also ushered in unprecedented development opportunities. In addition to the advantages of energy saving, environmental protection, pollution-free, and low noise, electric vehicles also have the advantages of quick start and low maintenance costs, and they have great potential in the development of future automobiles. As one of the core components of electric vehicles, power batteries have a huge impact on the range and safety of electric vehicles. Among them, l...

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Problems solved by technology

However, the disadvantage of this invention is that the contact area between the surface of the battery and the phase change material is small, the heat generated by

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