Device for detecting heat dissipation performance of phase change material, and method for detecting heat dissipation performance of graphene-paraffin composite material

Abstract

The invention discloses a device for detecting the heat dissipation performance of a phase change material. The device comprises a heat insulating plate, a sheet heating film, a phase change material cube module and thermocouples, so that the heat insulating plate and the phase change material cube module form a wrapping structure on the sheet heating film, and the temperature of the phase change material cube module is detected through the thermocouples. The invention also discloses a method for detecting the heat dissipation performance of a graphene-paraffin composite material. The device for detecting the heat dissipation performance of the phase change material is adopted, one side with a graphene-paraffin sample is upturned, a connecting circuit applies constant heat power to the heating film, the temperature change of every thermocouple is detected and recorded at regular intervals, and statistic analysis of data is carried out to analyze the temperature change curve of the graphene-paraffin composite at a given power. The heat dissipation effects of the graphene-paraffin composite material with different ratios can be conveniently and accurately detected, and the heat dissipation performances of graphene-paraffin composite material with different ratios can be serially compared and analyzed.

Description

technical field [0001] The invention relates to a detection device and method for the thermal physical properties of a heat-conducting material, in particular to a detection device and method for the heat dissipation performance of a thermal management material, which is applied to the thermal management material of electronic devices and its application technical field. Background technique [0002] At present, battery thermal management is mainly realized by heat dissipation of materials and phase change energy storage. As a phase change material, paraffin wax has a large phase change latent heat. When the temperature rises, it can absorb a large amount of heat through phase change, thereby maintaining relatively stable temperature. Compared with other phase change materials, paraffin wax also has the advantages of stable chemical properties, no separation and corrosion, low vapor pressure, and low price; the effect of different phase change materials for thermal managemen...

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Problems solved by technology

Although the simulation is convenient and simple, it is difficult for the calculation results to be completely consistent with the actual situation, and often needs to be verified by experiments. The simulation results can only serve as a reference for the experiment;

[0005] 3. Wrap the simulated heat source with thermal management material, and then apply power; this structure simulates the heat generation of the power supply through the heating resistance, wraps the heat source with the phase change material, and then turns on the power supply to detect and compare the phase change under different power The thermal management performance of the material; this structure is relatively simple, but requires a custom paraffin storage model, and requires more materials, and the process is cumbersome

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