Testing method of thermal resistance of heat-conducting material and testing clamp

Abstract

A testing method for thermal resistance of heat conducting material is disclosed. The testing jig which consist of heating unit and dissipating heat unit is set, the heat conducting material is clipped between the heating unit and dissipating heat unit; the testing jig clipping the heat conducting material is located in the environmental test box, and the parameters of the environmental test box is set to do environmental test; the testing jig tested by the environmental test is heated by the heating unit, the heat is transferred to the dissipating heat unit through the heat conducting material, the temperature of the heating unit and dissipating heat unit is measured; when the temperature is stable, the thermal resistance is calculated by calculating the power consumption of the heating unit and the temperature difference of the heating unit and dissipating heat unit. In the invention the testing jig which consists of the heating unit and dissipating heat unit is provided. The invention can test the reliability of the thermal resistance in different condition and improve the measuring accuracy.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a method for testing the thermal resistance of a heat-conducting material and a testing fixture. Background technique [0002] With the increasing power and miniaturization of electronic devices, the heat dissipation and insulation of electronic devices have brought severe challenges. The treatment design of the thermal interface is extremely important to prolong the life of the heat-generating device and enhance its reliability. [0003] Thermal design When simulating and designing heat dissipation schemes, the performance of thermally conductive materials is often regarded as an invariant, but in fact, thermally conductive materials are basically used in high-temperature states or high-low temperature cycles, and thermally conductive materials are used in high-temperature states for a long time Excessive seepage of silicone oil will cause problems such as drying out and separa...

AI Technical Summary

Problems solved by technology

[0008] 1. Since the thermal resistance test device of the heat-conducting material is a whole that cannot be disassembled, the heating block and the workbench cannot be separated, and the heat-conducting material cannot be put into the environmental test chamber after being fixed on the workbench of the test instrument, resulting in the failure of the test device. It can only be used at room temperature, and the thermal conductive material cannot be tested under various environmental conditions such as temperature and time, so the long-term reliability of the thermal conductive material cannot be evaluated

[0009] 2. Since the test process is carried out under no wind conditions, if the heat of the lower workbench cannot be dissipated in time, the temperature of the workbench will accumulate and rise, resulting in poor test result accuracy

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