Phase-change material rod

Abstract

The invention discloses a phase-change material rod and relates to the technical field of power battery box heat management. The phase-change material rod comprises a first casing, a second casing, a thermal conductive silicone piece and a phase-change material. The first and second casings are prepared from heat conduction, electrical isolation and flame retardation materials. The phase-change material rod has a special structure, after assembling, spaces in the two casings form an enclosed space and the enclosed space can be filled with the phase-change material. One surface of the thermal conductive silicone piece is boned to grooves of the first and second casings and the other surface of the thermal conductive silicone piece tightly contacts with the cylindrical surface of a cell. The phase-change material rod has high structural strength, retains good heat conduction and heat storage performances of the phase-change material and solves the problem that the single phase-change material has poor insulating properties and low flame resistance. The phase-change material is not leaked and is safe for use. The phase-change material rod realizes single cell heat management in work under condition of no increasing of a battery box volume, does not reduce battery box volume energy density and improves battery performances.

Description

Technical field [0001] The invention relates to a phase change material rod, in particular to a module that uses phase change heat storage technology and material heat conduction technology to conduct heat conduction on cylindrical batteries, and belongs to the technical field of power battery box thermal management. Background technique [0002] Research on the core technology of electric vehicle batteries has made great progress in recent years. The energy density of battery packs has continued to increase, and the range of electric vehicles has also increased correspondingly, which has driven the rapid development of the new energy industry. For single cells and the entire battery module In terms of thermal management, technology has developed slowly. In recent years, the application of phase change material technology to battery thermal management research has achieved good results. Phase change materials have good heat storage and heat conduction properties. After being inst...

AI Technical Summary

Problems solved by technology

However, since most phase change materials are functional materials, there are deficiencies of low structural strength, poor insulation and low flame retardancy in the matching use of battery packs. In addition, there is a problem that secondary heat dissipation is required after the phase change material absorbs heat and is saturated. , there are certain limitations in the application of functional phase change materials alone in the thermal management of batteries

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