Fire Containment Covers for HV and Traction Batteries

High-voltage batteries differ not only in length, width and height. Their geometry, connections, mounting points, transport racks, fixtures and the operational processes surrounding the battery system can also vary considerably.

Fingerhuth therefore consistently relies on customer-specific manufacturing for fire containment covers for HV and traction batteries. There are no predefined standard sizes that the battery system has to fit into.

The engineering process can be based on battery dimensions, technical drawings, CAD data, sample components or defined installation spaces. Based on this information, we develop a textile construction tailored to the battery system and the intended operational process.

The position and number of handles, document pockets and other design details can also be adapted to the specific application. The result is not a universal cover, but a fire containment cover engineered for the individual battery and process requirements.

The protective performance of a fire containment cover begins with selecting a material capable of withstanding the high temperatures as well as the mechanical and electrical requirements encountered in industrial battery processes.

For our HV and traction battery covers, we use high-temperature-resistant HR glass fabric. The base fabric is coated on both sides with a flame-retardant silicone coating.

The material composite is designed for continuous temperatures up to 1,000 °C. Short-term thermal peak loads of up to 1,200 °C are possible.

When handling high-voltage batteries, the electrical properties of the material are important in addition to its thermal resistance. The material used has therefore also been tested for dielectric strength up to 2,000 V. The material construction thus addresses not only high thermal loads but also the specific requirements of industrial high-voltage battery applications.

The silicone coating also improves surface resistance and supports robust handling of the cover throughout industrial production, logistics and storage processes.

During a thermal battery event, extremely high temperatures, flames, sparks and hot battery particles can develop within a very short period of time. In production and logistics areas in particular, other batteries, vehicles, equipment or combustible materials may be located in the immediate vicinity.

The fire containment cover encloses the battery system and forms a high-temperature-resistant textile barrier between the battery and its surroundings.

The purpose of the design is not to extinguish a battery fire by enclosing it within a sealed cover. Instead, the cover is designed to limit the spatial spread of flames, sparks and hot particles, thereby providing additional protection for adjacent areas.

It can therefore form part of an operational safety and emergency concept and provide an additional protective layer, particularly during temporary storage, battery handling, testing processes or when dealing with abnormal or potentially damaged battery systems.

A fire containment cover must provide more than thermal protection. In everyday industrial use, simple and reproducible handling is also essential for reliably integrating a protective system into existing operational processes.

Our standard design therefore includes integrated handling handles. They facilitate placing, positioning and removing the cover around the respective battery system.

The number and position of the handles can be adapted according to the dimensions, geometry, weight of the cover and intended handling process.

This is particularly relevant for larger traction batteries, where the cover may be handled by several people or as part of a defined operational procedure.