The Growing Threat of Lithium-Ion Battery Fires in South African Workplaces

Lithium-ion batteries have quietly become one of the most common potential hazards in the modern workplace. From laptops and smartphones to e-bikes, power tools, and electric forklifts, these compact energy sources are everywhere — and so are the fires they can cause when things go wrong. Unlike conventional fires, a lithium-ion battery fire involves a phenomenon known as thermal runaway: a self-sustaining chain reaction in which heat causes the battery cells to generate more heat, which in turn causes more cells to fail. Once it starts, it is extremely difficult to stop with traditional extinguishing agents. The scale of the problem is growing. South Africa's rapid adoption of solar energy systems, electric vehicles, and industrial battery storage means the number of large lithium-ion installations in commercial and industrial settings is increasing every year. Insurance companies are already adjusting their risk assessments accordingly. What Makes These Fires So Dangerous? A battery fire typically starts when a cell is physically damaged, overcharged, or exposed to excessive heat. The battery releases flammable gases — primarily hydrogen fluoride — that can ignite explosively. Water, the most widely used fire suppressant, can accelerate the reaction by causing steam explosions or conducting electricity in ways that damage surrounding equipment. Conventional fire extinguishers rated for Class A, B, or C fires are largely ineffective. Metal fire powder leaves an oxidising residue that corrodes nearby equipment. CO₂ and foam agents do not address the thermal runaway at the cell level. What Actually Works PyroBubbles® — inert borosilicate glass granules — have emerged as the most effective solution for lithium-ion battery fires in both industrial and commercial contexts. Their unique combination of properties addresses all four mechanisms of fire suppression simultaneously: They cover the burning material and cut off oxygen supply. Their porous microstructure absorbs the flammable gases being released by the battery. Their high specific heat capacity draws thermal energy away from the reacting cells, reducing peak temperatures and slowing or stopping the chain reaction. And their low thermal conductivity insulates adjacent cells from the heat being generated. Practical Recommendations for Workplaces Businesses that operate or store lithium-ion battery systems should conduct a formal fire risk assessment that specifically addresses battery chemistry. Storage areas should be assessed for adequate ventilation and segregation. Staff responsible for charging stations, battery rooms, or EV fleet operations should be trained in the specific hazards involved. For battery storage and transport, fire-rated cases such as the BSK-1 — which uses PyroBubbles® as both cushioning and an integrated suppression medium — provide a practical first line of defence. For larger fixed installations, PyroBubbles® can be deployed via silo systems with automatic release. If you manage a facility where lithium-ion batteries are stored, charged, or in regular use, speak to the Pyro Brand team about a fire risk assessment tailored to your environment.