Bidirectional convection type experiment box for lithium-ion power battery pack

Abstract

The invention relates to a bidirectional convection type experiment box for a lithium ion power battery pack. The test box comprises a square test box body, a test box rear end cover mounted on the rear end surface of the test box body, a fan mounted on the front end surface of the test box body, and an upper end fixing plate and a lower end fixing plate which are respectively fixed with the upperend surface and the lower end surface of the lithium ion battery pack; liquid medium runners are respectively arranged in the upper end fixing plate and the lower end fixing plate, and are inserted into the experiment box body through the sliding chutes. Compared with the prior art, the invention has the advantages of opposite flow of air and liquid, good cooling effect, uniform temperature distribution and the like.

Description

technical field [0001] The invention relates to the field of thermal management of lithium-ion batteries, in particular to a two-way convection experimental box for lithium-ion power battery packs. Background technique [0002] With the massive consumption of traditional fossil fuels and the gradual destruction of the atmospheric environment, new energy vehicles, especially pure electric vehicles, have become the forefront of the development of the transportation industry. Lithium-ion batteries have gained widespread attention in the fields of scientific research and car company R&D due to their high energy density and low self-discharge rate. However, with the large number of commercial and civilian use of pure electric vehicles, spontaneous combustion and explosion accidents caused by overheating cannot be eliminated so far; in winter low-temperature environments and high latitude regions, lithium-ion batteries cannot work normally due to low temperatures, seriously affect...

AI Technical Summary

Problems solved by technology

However, cooling / heating only with air and liquid flowing in one direction will inevitably lead to a temperature gradient along the flow direction, which will cause inconsistencies between lithium-ion battery cells, and the thermal management system with air as the medium is more susceptible to environmental influences; and Phase-change materials cannot achieve ideal temperature rise control under heat-generating conditions such as fast charging. Simply increasing the thickness of phase-change materials attached to the surface of lithium-ion battery cells will greatly increase its volume and mass, seriously increasing Power consumption of pure electric vehicles during driving

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