Form Energy publishes large-scale fire safety test results for its iron-air battery

Form Energy/Iron-air multi-day battery

Form Energy's iron-air battery cells passed rigorous UL9540A fire-safety testing, including repeated short circuits and seven days of continuous overcharging, with no thermal runaway, fire, dendrite formation or uncontrolled heating. Unlike lithium-ion batteries, the iron-air chemistry is intrinsically stable and requires no fireproof barriers, simplifying installation and lowering system costs.

• Passed UL9540A fire-safety testing with no thermal runaway, fire or dendrites.
• Tested through repeated short circuits and seven days continuous overcharging.
• Intrinsic safety eliminates need for fireproof barriers; lowers installation complexity and cost.
• Iron-air chemistry distinct from lithium-ion; uses iron, water, air with ~80% U.S. sourcing.