Thermal management material, preparation method thereof and application

Abstract

The invention discloses a thermal management material, a preparation method thereof and an application. The method includes the steps: in weight percentage, slowly adding 5-10% of multilayer flake graphene and 2-5% of carbon fibers into 60-80% of molten long-chain alkane, and uniformly stirring mixture to obtain initial phase-change materials; adding 2-5% of flame retardants into the initial phase-change materials to uniformly stir to obtain phase-change materials of compound flame retardants; mixing 5-10% of reinforced resins and 5-10% of oil-absorptive resins to heat to a molten state, adding the phase-change materials of the compound flame retardants, continually stirring for predetermined time, and cooling the mixture to obtain the thermal management material. The thermal management material prepared by the method has high flame resistance, insulation performance, high-thermal storage performance and heat-conducting performance, the thermal management material contacts with the surface of a new-energy power lithium battery, good heat-conducting effect can be achieved, heat storage effect can be also achieved, heat moment rising of a lithium battery pack is solved, thermal runaway risks are reduced, and safety of the battery pack is improved.

Description

technical field [0001] The invention relates to the field of heat management, in particular to a heat management material and its preparation method and application. Background technique [0002] At present, the thermal management of products in various industries is mainly to dissipate the generated heat to the surrounding environment through the good thermal conductivity of inorganic or organic materials. This management method not only cannot effectively suppress the rapid rise in temperature, but also increases the weight of the product. , and expand the volume of the product, which brings greater difficulty to the lightweight design of the product; [0003] Phase change materials (PCMs) are smart materials that can absorb or release heat when a substance undergoes a phase change, but the temperature of the substance itself does not change or changes little. Due to its unique adaptive environment temperature regulation and other functions, it is widely used in energy, m...

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Problems solved by technology

[0006] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a thermal management material and its preparation method and application, aiming at solving the problem of low thermal conductivity and poor thermal conductivity of the existing thermal management materials, which cannot achieve good uniformity of battery packs. Temperature resistance; poor flame retardant performance, easy to burn; poor shape stability and cycle stability of components, easy leakage on the surface of components, etc.

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