UL 9540A:2018 Test Method for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems.
1.1 The test methodology in this document evaluates the fire characteristics of a battery energy storage system that undergoes thermal runaway.
1.2 The data generated will be used to determine the fire and explosion protection required for an installation of a battery energy storage system intended for installation, operation and maintenance in accordance with the International Fire Code (IFC), the Fire Code, NFPA 1, the National Electrical Code, NFPA 70, the National Electrical Safety Code (NESC), IEEE C2, other energy storage system codes, and the manufacturer’s installation instructions.
1.3 Fire protection requirements not related to battery energy storage system equipment are covered by appropriate installation codes.
1.4 See Figure 1.1 for a schematic of the test sequence in this document. See Appendix A which explains:
a) The purpose of the tests included in this Test Method;
b) Explanation of individual tests; and
c) Interpretation and application of the results.
2 Units of Measurement
2.1 Values stated without parentheses are the requirement. Values in parentheses are a soft conversion.
3.1 Any undated reference to a code or standard appearing in the requirements of this Test Method shall
be interpreted as referring to the latest edition of that code or standard.
3.2 The following model codes or standards are referenced in this Test Method.
American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE)
Designation and Safety Classification of Refrigerants
Standard Test Method for Concentration Limits of Flammability of Chemicals (Vapors and Gases)
Determination of Maximum Explosion Pressure and the Maximum Rate of Pressure Rise of Gases and
Institute of Electrical and Electronics Engineers (IEEE)
National Electrical Safety Code (NESC)
International Code Council (ICC)
International Fire Code (IFC)
National Fire Protection Association (NFPA) Codes and Standards
Standard on Explosion Protection by Deflagration Venting
National Electrical Code
Standard on Types of Building Construction.UL 9540A pdf download.