Thermal runaway releases highly flammable gases and oxygen, which can accumulate and cause intense fires or powerful explosions within confined battery enclosures. The dense packing of cells and continuous oxygen generation make conventional fire suppression challenging and less. Energy Storage Solution: Batteries Batteries as an energy storage device have existed for more than a century. With progressive advancements, the capacities have ramped up to a point where battery energy storage can suffice to power a home, a building, a factory, and even to supplement the grid. Many. Application of gas fire extinguishing in, they can also block water from accessing the seat of the fire. So, large amounts of water are needed to effectively combat the heat generated from ESS fi es, and cooling the hottest cts of fire safety in ESS is mitigating risk of thermal runaway. So,the. ISO 3941:2026 introduces Class L, a new fire classification for lithium-ion battery systems that reflects their unique electrochemical behavior.