The novel thermal shield product developed by Microvent for battery pack thermal management system (BTMS) makes full use of superior thermal conductivity and insulation materials to greatly improve the thermal management efficiency of battery packs and meet customer requirements for performance, efficiency, reliability and durability.

As the main energy storage device of electric vehicles, battery pack is a key equipment of electric vehicles. The rise of temperature in battery pack will seriously affect the operation, cycle life and charging acceptability of electrochemical system of battery pack, battery pack power, safety and reliability. The temperature imbalance between each unit in the battery pack will eventually affect the consistency of battery performance and the accuracy of battery state of charge (SOC) estimation, which will affect the system control and life of electric vehicles. Therefore, the thermal management of battery packs has become a bottleneck problem affecting the survival and development of the new energy vehicle industry. In order to improve the performance of the vehicle and make the battery pack play the best performance and life, it is necessary to optimize the structure of the battery pack and design advanced battery pack thermal management system (BTMS).

SiO2 aerogel and e-PTFE composite material, a novel thermal shield product developed by the company for battery pack thermal management system (BTMS), is a composite material formed by precise coating of SiO2 aerogel on the surface of expanded polytetrafluorethylene (e-PTFE) film using a special process. The composite material has the comprehensive performance requirements of heat insulation, heat preservation, energy saving, sound insulation, flame retardant, sealing, insulation, corrosion resistance, environmental aging resistance, lightweight, hydrophobic, oil hydrophobic, high water pressure immersion resistance and no deterioration. SiO2 aerogel and e-PTFE film composite can fully meet the performance requirements of thermal insulation materials for battery pack thermal management system (BTMS).

Through EPTFE's waterproof and breathable material properties and high resistance, it is applied to automotive new energy battery parts, high pressure resistance, environmental resistance, with overvoltage protection and other functions, and mass production is applied to VW models to achieve balanced pressure, convection and heat dissipation of high-tech products.