Composition, high-efficiency flame-retardant phase change thermal management composite material which is prepared from composition and preparation method of composition and high-efficiency flame-retardant phase change thermal management composite material

Abstract

The invention relates to a composition, a high-efficiency flame-retardant phase change thermal management composite material which is prepared from the composition and a preparation method of the composition and high-efficiency flame-retardant phase change thermal management composite material. The composition comprises, by weight, 25-90% of an alkane phase change material with a phase transitiontemperature of 20-60 DEG C, 5-15% of thermally conductive filler, 5-25% of one or more of the following flame retardants including aluminum hypophosphite, an ammonium polyphosphate-pentaerythritol composite and a phosphorus-nitrogen nanocomposite flame retardant, 0-30% of a resin-based material, 0-2% of an antioxidant and 0-3% of glass fiber. The composite material has excellent mechanical properties, high thermal conductivity, a high encapsulation rate for phase change materials and no leakage after phase change is performed, the temperature of a battery pack can be regulated effectively, andthe temperature of the battery pack can be controlled within an optimal working temperature range, so that the service life and reliability of the battery pack are improved; and a highest level of V-0 in the UL 94 standard is achieved, excellent flame retardant performance is achieved, and the safety of the battery pack is improved.

Description

technical field [0001] The invention relates to the technical field of phase-change materials, in particular to a composition, a high-efficiency flame-retardant phase-change thermal management composite material prepared by using the composition and a preparation method thereof. Background technique [0002] Under the current dual pressure of energy shortage and environmental pollution, the development of new energy vehicles is the general trend. As the power source of electric vehicles, the power battery has a vital impact on the performance of the vehicle. However, the battery is accompanied by heat generation during the charging and discharging process. If the generated heat is not effectively removed, the heat accumulated inside the battery will increase the temperature of the battery core, resulting in accelerated deterioration of the battery module and reduced service life. Sometimes the battery module may even have safety-related events such as fire or explosion, so ...

AI Technical Summary

Problems solved by technology

However, paraffin phase change materials are flammable, and polyolefin polymers, which are often used as support materials for shaped phase change materials, are also flammable, and can release a large amount of toxic gases during the fire process, with high heat and high temperature. , there is a high risk of fire, these shortcomings seriously hinder the large-scale application of phase change thermal management composites in the field of thermal management

[0006] The Chinese patent application with the application number 201621231244.1 discloses "a heat management system for power batteries based on shape-fixed phase change materials". Solve the problem of flammability and high fire hazard of phase change materials

[0007] The Chinese patent application with application number 201110191570.X discloses "Phase Change Composite Material, Its Preparation Method and Application". Although this patent prepares a fire-resistant and flame-retardant phase change material, the flame retardant added in the patent is The compound system of chlorinated paraffin and brominated flame retardant, although the flame retardant effect of brominated flame retardant is better, but it also brings serious consequences when it is flame retardant: the material added with brominated flame retardant When ignited by an open flame or ignited by high temperature, a large amount of toxic gases such as hydrogen halide and dioxin will be released, and hydrogen halide gas can absorb moisture in the air to form hydrogenated acid, which is highly corrosive and can cause secondary damage

[0008] The Chinese patent application with the application number 200810196742.0 discloses "a flame retardant shape-fixed phase change material and its preparation method". Tested, tested the amount of heat release and burning time, but did not test its flame retardancy according to the current international UL 94 vertical burning rating, nor did it test its mechanical properties

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