Cooling device of heat pipe fins for power battery system and mode selecting method

Abstract

The invention relates to a cooling device of heat pipe fins for a power battery system and a mode selecting method. The cooling device of the heat pipe fins for the power battery system comprises a battery box, wherein a plurality of battery module groups are arranged in the battery box in parallel; each battery module group is provided with a heat pipe group in a matched manner; and two ends of each heat pipe group penetrate through the battery box and are connected with cooling fins. The mode selecting method comprises the following steps: establishing equivalent heat resistance models of the heat pipe groups and the cooling fins; establishing a concentrated parameterized ID heat transfer modules for a main heat transfer path after the equivalent heat resistance models are established; establishing a partial differential equation of a heat transfer process of each element; and after determining a convective heat transfer coefficient (h) required for the system, selecting a cooling scheme. The cooling device of the heat pipe fins for the power battery system has the advantages of high cooling efficiency, low complexity of the system and high safety; meanwhile, the expandability is high, the cooling mode can be randomly adjusted according to actual demands of products, and the degree of standardization is high; and IP67 design of the battery box is realized easily, space and cost are saved, and safety of the power battery system is improved.

Description

technical field [0001] The invention belongs to the technical field of methods or devices for directly converting chemical energy into electrical energy, such as battery packs, and particularly relates to a method that can improve the heat dissipation efficiency of a power battery system, improve the heat dissipation effect, and complete different battery modules in different modes Cooling device and mode selection method of heat pipe fins for power battery system with heat dissipation problem. Background technique [0002] In recent years, with the support of the state and favorable conditions such as the market, the power lithium-ion battery industry has developed very rapidly, and its application has been extended to electric buses, electric cars, micro-buses and energy storage. With the large-scale application of power lithium-ion batteries, more and more problems have become increasingly prominent, especially the heat dissipation of power battery systems. [0003] The ...

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Problems solved by technology

[0005] The technical problem solved by the present invention is that in the prior art, the cooling method is basically a single natural cooling, air cooling and liquid cooling, resulting in the inability to take into account the cooling efficiency, high system complexity and safety risks. At the same time, the prior art The cooling method is fixed and has no scalability. There is a problem that only one cooling mode can be fixed for one product, and then an optimized cooling device and mode selection method for heat pipe fins for power battery systems are provided.

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