Efficient Extinguishing of Li-Battery Storage Fires

February 20, 2017 by Jeff Shepard

DryCloud is a development and patent belonging to Envites Energy. Using especially a neutralizer and dry foam, EV (electric vehicle) Li-Ion batteries for electric mobility can be quickly extinguished. Furthermore, possible hazardous substance emissions are neutralized and propagation, a feared subsequent reaction, can also be specifically suppressed.

“The system is also environmentally friendly; it makes significant savings on resources and prevents the occurrence of environmental hazards” says Tim Schäfer from Envites Energy. “This is extremely important for lithium batteries due to their high fire loads, hazardous heat emissions, jet flames and massive, corrosive and re-ignitable smoke development,” he adds.

The DryCloud fire protection system is also suited for stationary storage systems and other constructions. In particular, special and modular solutions are already available for storage and transportation. DryCloud is a scalable system solution which fulfills high standards and certifications: It is a resource-efficient, fast-acting solution, (cost reductions in system and consumption (saves substantial amounts of water). Hardly any discharge liquid, no entry into the ground water or wastewater system (cf. in Germany, Wasserhaushaltsgesetz (German Water Resources Act - WHG)

Optionally available with use of a neutralizer against aggressive media (HF) or a cost-effective and fluorine-free, highly-efficient foaming extinguishing agent which is highly expansive (preferably 400:1 or 1000:1 foaming action). Extremely high penetration, cooling, covering, extinguishing effects, embedding of waste gases, heat or smoke etc. The system is certified, durable and is supported by a global market leader (components).

Within an extremely short time, fire sites can be flooded and three-dimensional fires efficiently suppressed, with comparably high savings on water consumption, stockpiling and minimization of damage, but in particular a hazard reduction for people, animals and the environment (in particular fire service personnel, emergency service personnel).

It provides quick and prolonged control of temporarily burning fires with flammable substances, also at high temperatures. Conventional equipment with many years of deployment experience can be used.

It has a strong smothering effect, with cooling and exclusion of oxidizing media (shielded by medium, embedded in the medium) high impact capability (can) strongly hinder or stop the propagation effect according to the current state of knowledge and the test results at the e-lab, ZSW Ulm.

Low costs in comparison to lightweight foam, sprinklers, water, mist, protection gas and other conventional solutions.

Joint project: SPEISI – Safety and reliability of photovoltaic systems with storage systems under particular consideration of fire risks and extinguishing strategies. This project by the Germen Federal Ministry of Economics (Bundeswirtschaftsministerium) has the objective of investigating the safety of stationary storage systems for numerous different application purposes. In the process, possible weaknesses – for example, application rules, handling, installation and operation – are analyzed.

Further key points of the project are the investigation of handling storage systems in emergencies for emergency and rescue personnel, and the development of criteria for the determination of photovoltaic (PV) storage system performances. The objective of this work step is to analyze evaluation criteria which permit an assessment of performance behavior with regard to the reliability of the systems in long-term operation. The verification was successfully implemented for the efficiency of DryCloud.