Following the recommendations of the technical committees for Preventive Fire and Hazard Protection and for Operations, Extinguishing Agents and Environmental Protection of the German fire departments within AGBF Bund, the following procedure was officially recommended in January 2021.
The initial firefighting measures are the same as for a normal car fire: cooling with water and, if necessary, with extinguishing agent additives such as firefighting foam or wetting agent.
It is important to always consult the latest rescue data sheets.
In general, modern vehicles show increased smoke and heat release.
If an electric vehicle is involved, the high-voltage battery should be checked with a thermal imaging camera.
Water remains the efficient extinguishing agent for firefighting.
If a temperature well above the ambient temperature is measured when checking the high-voltage energy storage in the electric vehicle, combined with a steady rise in temperature, current recommendations call for cooling the housing of the high-voltage energy storage with water.
Quarantining is explicitly not a task of the fire department. In its latest technical recommendation, the German Social Accident Insurance (DGUV) advises using this method only in absolutely exceptional cases, as disposing of the extinguishing water places a major logistical burden on fire departments. Preventive wet quarantine in particular must be avoided.
The HV battery in the EV must be cooled and monitored with the thermal imaging camera until the vehicle can be handed over to the operator or a suitable towing service.
Extinguishing success is achieved solely through the cooling effect of the water.
Source:
https://www.agbf.de/downloads-fachausschuss-vorbeugender-brand-und-gefahrenschutz/category/28-fa-vbg-oeffentlich-empfehlungen?download=356:2021-01-fachempfehlung-elektrofahrzeuge