Battery heat-insulation flame-retardant explosion-proof system

Abstract

The invention discloses a battery heat-insulation flame-retardant explosion-proof system, and relates to the technical field of battery heat management. The system comprises a matrix layer and an excitation material pipeline, wherein the matrix layer wraps a battery cell and is made of a foaming material, and the excitation material pipeline is arranged outside the matrix layer; and an excitation material used for exciting the foaming material to enable the foaming material to be subjected to phase change curing is stored in the excitation material pipeline, and the excitation material can automatically flow out of the excitation material pipeline under the action of a high temperature. The foaming material matrix layer is wrapped outside the battery, and heat transfer to adjacent batteries is reduced by utilizing the heat insulation property of the foaming material so that other batteries are prevented from being affected; meanwhile, by utilizing the heat absorption expansion performance of the foaming material, the temperature of the battery is reduced, gaps among the batteries are further extruded, and flame propagation is blocked; and the active protection mode integrating cooling, isolation, flame retardance and explosion prevention is effectively achieved, safety and high efficiency are achieved, the risks of battery thermal runaway and battery reburning caused by a linkage effect are reduced to a certain degree, and accidents are prevented from further expanding.

Description

technical field [0001] The invention relates to the technical field of battery heat management, in particular to a battery heat insulation, flame retardant and explosion-proof system. Background technique [0002] In recent years, new energy vehicles and related technologies at home and abroad have been greatly developed, and batteries, as energy storage devices for electric vehicles, have also been widely used. As the core technology of new energy vehicles, battery drive technology provides new ideas for the development and utilization of new energy for human beings. [0003] However, the wide application of batteries has also brought new potential safety hazards, and domestic and foreign power battery fires and explosion accidents have occurred from time to time. According to incomplete statistics, since 2016, there have been more than 200 domestic new energy vehicle fire accidents, and more than half of the accidents originated from batteries. The continuous occurrence o...

AI Technical Summary

Problems solved by technology

The main defects are: 1. In terms of battery safety protection, the traditional protection idea provides passive protection for the normal heating of the battery, that is, air cooling is adopted when the battery does not experience thermal runaway.

This protection idea does not consider controlling the thermal runaway scenario with huge heat generation; 2. Affected by the structure of the battery, the existing technology cannot inject fire extinguishing agent into the battery, which makes battery fire control difficult and the possibility of re-ignition is high; 3. Commercially available There are many types of batteries, and the replacement of batteries is accelerated. The corresponding fire and explosion protection systems need to be adapted in time

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