Graphene epoxy compound material for electric automobile driving module and preparation method

Abstract

The invention provides a graphene epoxy compound material for an electric automobile driving module and a preparation method. The compound material disclosed by the invention is formed by compoundinggraphene/inorganic powder particle hybrid materials with epoxy resin; the graphene/inorganic powder particle hybrid materials as filler are uniformly dispersed into a basal body of the epoxy resin. Byadopting the graphene/inorganic powder particle hybrid materials as the epoxy resin filler, the advantages of excellent performance such as high graphene strength and good heat conduction performanceof graphene as well as high heat conductivity, low expansion coefficient, high filling property, low stress and the like of inorganic powder particles can be fully developed, the defect of easiness for aggregation of the graphene/inorganic powder particle hybrid materials and the epoxy resin is overcome, enhancement and toughening effects can be achieved, and the application performance of the resin is improved. The compound material prepared by adopting the technical scheme has the special performance such as high heat conductivity, high adhesion strength, small change of curing volume, strong weathering resistance, high temperature resistance, small heat expansion coefficients and the like, and is very suitable for being used as an epoxy material for encapsulation in an overall encapsulation technology of a new-energy automobile motor driving module.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a graphene-epoxy composite material used for electric vehicle drive modules and a preparation method. Background technique [0002] At present, the power film capacitors used in electric vehicles generally need to add an aluminum or plastic casing to ensure strength, but the metal casing needs to consider the insulation problem. Adding a plastic casing increases the volume of the capacitor, thereby increasing the thermal resistance and affecting the performance of the capacitor. Those skilled in the art would like to realize integrated potting by adopting the integral potting technology of shellless film capacitors. To realize this technology, it is first necessary to solve the strength, toughness, curing stress and thermal conductivity of the epoxy material used for potting. [0003] Graphene is a flat film composed of carbon atoms, and the connections between the i...

AI Technical Summary

Problems solved by technology

[0004] Graphene / epoxy resin composites can effectively make up for the shortcomings of a single material. Through methods such as "blending effect" and "learning from each other's strengths and weaknesses", a composite material with both advantages can be obtained; however, due to the size effect, the relationship between graphene and Agglomeration is prone to occur, and the high viscosity of the epoxy matrix can easily lead to uneven dispersion of graphene, and the atomic structure is prone to collapse during use, making the material performance far from the expected effect

As a result, the performance and application of graphene / epoxy composites are limited to a certain extent.

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