How to Prevent a Thermal Runaway Reaction?

A thermal runaway is an unstoppable reaction that occurs within milliseconds inside of an electric vehicle battery pack. The challenge about thermal runaway is that it cannot be extinguished easily, this is because the electrolyte in the battery acts as fuel and the cathode of the battery provides oxygen for the situation to worsen.

Once the thermal runaway is started, it can only be localized, minimized, and prevented from reaching the other components in an electric car. That’s why you will find a range of Mica insulation products such as Mica compression pads, Mica battery pack insulation, and thermal spacers used to provide thermal and electrical insulation for the automotive battery industry.



Preventing Thermal Runaway in Electric Vehicles

Compression pads are used to mitigate thermal runaway in electric vehicle batteries. Compression pads maintain enough pressure on the battery pack that includes a stack of cells making up a module to ensure secure electrical and thermal connections; while allowing the package itself to expand and change shape. Compression pads work on the principle of compression force deflection (CFD), where the spring-like characteristics of the foam deflect and return energy to diffuse it across a range of compression amounts.

Thermal runaway can reach temperatures up to 400°C. Therefore, it is very important that the compression pads are made of materials that can bear extremely high temperatures and do not deform when subjected to extreme pressure or compression loads.     


Why Mica for Automotive Insulation?

Mica minerals are used as the preferred choice of material to manufacture a range of thermal and electrical insulation products and components for the automotive industry. Common products include gasket and washer products, heat shield insulation, flame retardant barriers, and component-specific heat shields.

If you are looking for a reliable partner to produce components for automotive insulation, Axim Mica is the leading supplier and manufacturer of Mica-based insulation products.      


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