Standards guide

UL 9540A

Battery energy-storage thermal runaway fire propagation

This guide is an engineering orientation, not a substitute for the current official standard text or the requirements of the receiving market. Confirm the applicable edition and scope with the responsible technical or regulatory team.

A test methodology for evaluating thermal runaway fire propagation across progressive battery energy-storage system levels.

Questions to resolve first

  • Which system level is relevant?
  • What fire and building-code question must be answered?
  • Are cell, module or unit data already available?
  • Where can the appropriate physical test be delivered?

How ThermSafe can help

  • Map the requirement to an agreed test scope.
  • Review existing data and identify dependencies.
  • Plan simulation or local physical testing where required.
  • Interpret results for design and validation decisions.
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