UL 9540A
Test Method for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems

DETAILS
Edition Number:4SCC Approved:2019-11-12
Edition Date:2019-11-12DOD Approved: --
Price Code:AANSI Approved: 2019-11-12
Type:ulstd

  • SCOPE

    1 Scope

    1.1 The test methodology in this standard determines the capability of a battery technology to undergo thermal runaway and then evaluates the fire and explosion hazard characteristics of those battery energy storage systems that have demonstrated a capability to undergo 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 ICC IFC, NFPA 1, NFPA 70, IEEE C2, CAN/CSA C22.2 No. 0, and other codes affecting energy storage systems, 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 standard. See Annex 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 7.

    b See Section 8.

    c See Section 9.

    d See Section 10.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
          • 3 Normative References
          • 4 Glossary
        • CONSTRUCTION
          • 5 General
            • 5.1 Cell
            • 5.2 Module
            • 5.3 Battery energy storage system unit
        • PERFORMANCE
          • 6 Cell Level
            • 6.1 Sample
            • 6.2 Determination of thermal runaway methodology
            • 6.3 Cell vent gas composition test
            • 6.4 Cell level test report
          • 7 Module Level
            • 7.1 Sample
            • 7.2 Test method
            • 7.3 Module level test report
          • 8 Unit Level
            • 8.1 Sample
            • 8.2 Test method
            • 8.3 Unit level test report
            • 8.4 Performance
          • 9 Installation Level
            • 9.1 General
            • 9.2 Sample
            • 9.3 Test method 1 – Effectiveness of sprinklers
            • 9.4 Installation level test report – Test method 1 – Effectiveness of sprinklers
            • 9.5 Performance – Test method 1 – Effectiveness of sprinklers
            • 9.6 Test method 2 – Effectiveness of fire protection plan
            • 9.7 Installation level test report – Test method 2 – Effectiveness of fire protection plan
            • 9.8 Performance – Test method 2 – Effectiveness of fire protection plan
    • APPENDIX A