Fire protection for lithium-ion battery storage systems

siemens fire safety application li-ion battery energy storage protection

Our energy infrastructure is undergoing a radical transformation. An influx of excess energy from renewable sources like wind and solar is causing fluctuations in energy supply and putting grid stability at risk. Energy storage is a key component to balance out supply and demand and absorb the fluctuations. Today, lithium-ion battery storage systems are the most common and effective type and, as a result, installations are growing fast.

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Stationary lithium-ion battery energy storage systems – a manageable fire risk


Lithium-ion storage facilities contain high-energy batteries combined with highly flammable electrolytes. In addition, they are prone to quick ignition and explosion in a worst-case scenario. Such fires can have a significant financial impact on organizations. Rapid detection of electrolyte gas particles and extinguishing are the key to a successful fire protection concept. Since December 2019, Siemens has been offering a VdS-certified fire protection concept for stationary Li-ion battery storage systems. 

What can go wrong?

The main goal is to prevent the propagation of a thermal runaway. But what causes a thermal runaway in the first place and what happens inside a battery cell? This video will give you the answer.

Our Solution

Earliest possible detection with the FDA241 aspirating smoke detector

The FDA241 detects electrolyte vapor early and reliably thanks to its patented dual-wavelength optical detection technology. In accordance with normative requirements, two independent FDA241s are required to trigger the activation of the automated extinguishing system. The FDA241 is the ideal solution for early detection of electrical fires. In addition to controlling the automated extinguishing system, the fire protection system triggers all other necessary control functions.

Safe and sustainable fire suppression and extinguishing with Sinorix N2

Sinorix N2 extinguishing systems prevent electrical fires, stop the propagation of thermal runaways and reliably prevent the spread of secondary fires. A holding time of 30 minutes not only gives the fire brigade time to react, but also prevents any delayed runaway.

*Our tests have shown that the lower the remaining oxygen concentration, the better the protection against the explosive combustion of electrolyte vapor.

Do you want to know more about our protection conecpt for Li-ion battery storage systems?

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Find out more on the Siemens Fire Protection Concept

Li-ion battery storage systems have found their way into a number of applications, not only for grid balancing, but also as reserve power supply. They accelerate the adoption of renewables and provide capacity and flexibility where it is needed. Even though Li-ion energy storage systems present a fire hazard, it is a manageable risk. Would you like to know how you can use these emerging technologies safely while minimizing the risk of fire? Watch the webcast for more information.


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