Thermal Barriers: Elevating EV Battery Performance

A Solution for Increasing Resistance to Thermal Propagation

As a partner to the automotive industry, Freudenberg combines market-specific know-how with unique materials, technology, and development expertise to create innovative e-mobility solutions. This includes groundbreaking products such as our thermal barriers that slow—or even stop—thermal runaway propagation.

To mitigate the risk of thermal runaway, our engineers have developed thermal barriers.

What is Thermal Runaway and Why Do We Need to Manage It?

In electric vehicles, thermal runaway occurs when the temperature of the battery pack increases uncontrollably, leading to a rapid and dangerous release of heat. In some cases, this causes the battery cells to overheat, catch fire, or even explode.

How Thermal Barriers Elevate EV Battery Performance

Think of the thermal barriers as protective layers designed to prevent or slow the spread of heat within the battery packs of electric vehicles.

These barriers are typically made of materials with high thermal resistance, meaning they are not easily conductive to heat. In fact, they can withstand temperatures as high as 1200°C. Additionally, the materials offer electrical insulation properties. Thermal barriers are strategically placed inside the battery pack to protect components and contain hot gases, flames, and abrasive particles during thermal runaway.

Thermal barriers are available in different forms to improve heat management. 3D Thermal Barriers can be custom-made to fit specific shapes, helping to cover crucial components or serve as dividers within the battery pack. Battery Protective Covers and Mats come in flat shapes that align with the dimensions of battery covers or cases. Moreover, thermal barriers can be specifically engineered to attach directly to the battery cell.

The primary purpose of these thermal barriers is to limit the transfer of heat within the battery pack. By minimizing the chances of heat transfer, the barriers help prevent the phenomenon of thermal runaway from propagating or spreading rapidly throughout the battery pack.

Overall, by incorporating thermal barriers in electric vehicle battery packs, engineers can better manage and control heat generation, minimizing the risk of thermal runaway and enhancing the safety of the vehicle and its occupants.