Understanding UL 9540A Cell-Level Testing for Energy Storage Systems

As energy storage systems (ESS) continue to scale in power and complexity, safety remains a top priority—starting at the cell level. This white paper explores the critical role of UL 9540A cell-level testing in evaluating thermal runaway behavior, a foundational step in ensuring safe and compliant battery energy storage systems.

You’ll learn how cell-level testing supports risk assessments for fire propagation, helps manufacturers meet regulatory requirements, and contributes to safe ESS designs across applications from stationary storage to electric vehicles.

TÜV SÜD offers expert insights into the test procedures, data evaluation, and compliance pathways associated with UL 9540A, helping you better understand what’s required and how to prepare.

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