On August 11th local time, at the Suncycle engineering and testing center for solar and energy storage services located in Thuringia, Germany, the lithium battery container caught fire again, marking the third time in two months that the fire department had to respond to the scene.

The fire department stated on its Facebook page that one employee suffered minor injuries from smoke and fumes; the German Press Agency (dpa) reported that the injured employee, to prevent the spread of the fire, used a forklift to move the burning storage unit away from the battery container storage area, and according to the fire department, the damage is estimated at 30,000 euros.

After the fire, due to the heavy smoke, the local government issued a warning for residents to keep their windows and doors closed, which lasted until Monday. This was the third fire involving Suncycle's battery energy storage components since June 7th.

On June 7th, a fire occurred in a battery inside an overseas container at the Suncycle engineering and testing center. According to local media reports, it took the fire department more than 4 hours to extinguish the fire. The German federal government's early warning application was activated, and a similar toxic air warning was issued to affected residents. The fire caused a loss of 700,000 euros.

On June 30th, the company's battery container caught fire for the second time. The fire department stated that during the first firefighting action, toxic hydrogen fluoride was produced by the reaction of water with the burning storage device. Therefore, based on the experience of the fire extinguishing on June 7th, the local fire department decided to adopt a strategy of monitored natural burning to avoid using water for direct extinguishing, in order to reduce the generation of toxic gases. About 100 firefighters arrived at the fire scene and it took 12 hours to complete the fire extinguishing. According to the police, the loss caused by the second fire has not been announced yet.

The Suncycle factory in Germany has had continuous fires of energy storage batteries in a short period of time, which has not only caused huge economic losses but also triggered heated discussions among the German public. It is generally believed that there are technical flaws in energy storage batteries. Although lithium batteries have the advantage of high energy density, they also have the risk of being flammable and explosive. These continuous accidents highlight the hidden dangers of lithium batteries in terms of safety.

The safety of energy storage systems is a systemic issue that requires comprehensive consideration and measures from multiple perspectives: strictly control product quality, follow technical specifications for battery production and storage, change battery materials or add flame retardant media, optimize fire safety measures and battery management systems, and actively research and break through battery technology routes with intrinsic safety (such as flow batteries...). Consider from the early stage of product design, throughout the entire product lifecycle, improve the overall safety of energy storage systems, reduce safety risks, and promote the sustainable development of the energy storage industry.

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