1 Scope

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.

1.4 Figure 1.1Schematic of Test Sequence

^a See Section 6.

^b See Section 7.

^c See Section 8.

^d See Section 9.

Summary of Topics

This Fourth Edition of ANSI/CAN/UL 9450A, Standard for Safety for Test Method for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems, has been issued to reflect the latest ANSI and SCC approval dates, and to incorporate the proposals dated March 29, 2019 and August 16, 2019.