Self-adaptive thermal management system for dealing with lithium battery parking thermal runaway

Abstract

The invention provides a self-adaptive thermal management system for dealing with lithium battery parking thermal runaway, a composite separator plate is arranged between lithium battery monomers, the self-adaptive thermal management system comprises a phase change material, the phase change material stores heat during normal work, and the phase change material has poor thermal conductivity, and a metal cavity enhances thermal conductivity; during shutdown thermal runaway, the phase change material around the lithium battery is difficult to meet the heat storage requirement, is melted and transfers heat to the shape memory alloy driving mechanism in the metal cavity, and the shape memory alloy extends and pushes the metal sliding block to move, so that the purpose of isolating the thermal runaway battery is achieved; secondly, during parking, the alarm device cannot be started, and, at the moment, the metal sliding block serves as a heat source of the thermoelectric power generation piece to generate current so as to start the alarm device; finally, the temperature of the battery box is further increased, so that the medium-temperature phase-change material at the top end is melted, and the dry powder extinguishing agent sealed at the top end is released to extinguish fire. According to the invention, early warning, isolation and fire extinguishing are integrated, and the problem of thermal runaway of the lithium battery during parking can be adaptively solved.

Description

technical field [0001] The invention relates to an adaptive thermal management system for coping with lithium battery parking thermal runaway, in particular to an adaptive thermal management system that integrates alarm, isolation and fire extinguishing for coping with lithium battery parking thermal runaway, belonging to lithium battery parking thermal runaway technology field. Background technique [0002] With the continuous development of lithium-ion battery energy density, improving its safety has become the most important step in the development of electric vehicles. Therefore, thermal runaway is a key issue in battery safety research. But at present, many spontaneous combustion incidents have occurred in new energy vehicles, and the energy released by the entire battery pack is amazing. This makes the public full of doubts about the safety of electric vehicles. If the electric vehicle experiences thermal runaway during use, the BMS early warning system in the car c...

AI Technical Summary

Problems solved by technology

However, when the parking heat is out of control, the entire spontaneous combustion process, without any warning, will cause unimaginable consequences to drivers and pedestrians

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