A battery module with phase change energy storage cooling

Abstract

The invention relates to a phase-change energy-storing cooling battery module comprising a plurality of electric core modules arranged in series; each electric core module comprises a shell body and a plurality of electric cores arranged in the shell body, four electrical cores form a group and are distributed in an upside-down T-shaped shape, and the center of each group of the electric cores is inserted with a thin-wall expansion aluminum tube in a penetration manner; each thin-wall expansion aluminum tube has a hollow cylindrical structure with one end opening and is filled with a composite material, and an opening tube of each thin-wall expansion aluminum tube is sealed by a plug; the composite material is composed of paraffin and expanded graphite; the paraffin is a PCM material, has relatively high phase-change latent heat per unit mass, has a high melting temperature in a battery operating temperature range and has relatively low cost; but pure paraffin has poor thermal conductivity, so the expanded graphite is added to improve thermal conductivity rate and increase natural convection cooling effects.

Description

technical field [0001] The invention relates to a battery module, in particular to a battery module cooled by a phase change energy storage method. Background technique [0002] Nowadays, the thermal management of battery packs generally adopts forced air cooling or liquid cooling, but this type of system requires some such as fans, pumps, heat exchangers, heaters, pipelines and other accessories, making the structure too large and complicated, and it is also It consumes battery energy and reduces the power density and energy density of the battery. Contents of the invention [0003] Aiming at the above problems, the present invention proposes a phase change energy storage and cooling battery module, which has simple structure, low energy consumption and low cost. [0004] The specific technical scheme is as follows: [0005] A battery module for phase-change energy storage cooling, including several battery modules arranged in series, the battery module includes a housi...

AI Technical Summary

Problems solved by technology

[0002] Nowadays, the thermal management of battery packs generally adopts forced air cooling or liquid cooling, but this type of system requires some such as fans, pumps, heat exchangers, heaters, pipelines and other accessories, making the structure too large and complicated, and it is also Consumes battery energy, reducing the power density and energy density of the battery

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