Fire protection system for electric vehicles

The technology described here addresses this challenge through a duct system structurally integrated into the battery frame. An inlet duct system arranged on the underside of the battery frame and provided with strategically positioned openings distributes water or a suitable liquid extinguishing medium into the cavity of the battery enclosure. In addition, a duct system on the upper side of the battery frame is provided for the defined discharge of heated gases and extinguishing medium. The geometry, positioning, and design of the ducts are combined with fluid-mechanical principles in order to achieve rapid, uniform, and controlled flooding of the battery interior. In the event of an incident, water is fed into the integrated duct system via the lower section of the battery frame. The openings or bores provided there introduce the medium into the cavity structure of the battery enclosure. Flooding from the bottom upward exposes the battery interior to the extinguishing medium within a short period of time. The combination of lower-side supply and upper-side venting makes use of the natural tendency of hot gases to rise and creates a directed flow path through the battery enclosure. This can prevent hot gases from accumulating uncontrollably in cavities or extinguishing water from remaining in the system without a defined drainage path.