UL 1974
Standard for Evaluation for Repurposing Batteries

DETAILS
Edition Number:1SCC Approved:2018-10-25
Edition Date:2018-10-25DOD Approved: --
Price Code:AANSI Approved: 2018-10-25
Type:ulstd

  • SCOPE

    1 Scope

    1.1 This standard covers the sorting and grading process of battery packs, modules and cells and electrochemical capacitors that were originally configured and used for other purposes, such as electric vehicle propulsion, and that are intended for a repurposed use application, such as for use in energy storage systems and other applications for battery packs, modules, cells and electrochemical capacitors.

    1.2 This standard also covers application specific requirements for repurposed battery packs/systems and battery packs/systems utilizing repurposed modules, cells and other components.

    1.3 This standard does not cover the process for remanufactured batteries, which are also referred to as refurbished or rebuilt batteries.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
    • UL Preface
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Normative References
          • 6 Glossary
        • CONSTRUCTION
          • 7 General
          • 8 Materials
          • 9 Enclosures
          • 10 Wiring and Connections
          • 11 Electrical Spacings and Insulation Levels
          • 12 Controls
          • 13 Coolant and Other Critical Systems
          • 14 Cells and Electrochemical Capacitors
        • QUALITY CONTROL AND SAFETY OF FACILITIES FOR REPURPOSING
          • 15 Quality Control
          • 16 Safety of Facilities for Repurposing
        • EXAMINATION OF INCOMING SAMPLES
          • 17 General
          • 18 Procedures for Examination and Sorting of Used Batteries and Their Components
            • 18.1 General
            • 18.2 Information gathering and review as part of the initial sorting procedures
            • 18.3 Initial and subsequent rejection procedures
            • 18.4 Visual inspection of incoming samples
            • 18.5 Gathering and analysis of BMS data
            • 18.6 Disassembly and examination
            • 18.7 Storage condition tracking
            • 18.8 Grading of batteries for repurposing
        • PERFORMANCE
          • 19 Testing for the Sorting and Grading Process
            • 19.1 General
            • 19.2 Incoming open circuit voltage (OCV) measurements
            • 19.3 Incoming high voltage isolation check
            • 19.4 Capacity check
            • 19.5 Internal resistance check
            • 19.6 Check of BMS controls and protection components
            • 19.7 Discharge/charge cycle test (monitoring of temperature, voltage and current of cells and modules)
            • 19.8 Self discharge
            • 19.9 Cell performance and safety characterization
          • 20 Testing of Assembled Repurposed Batteries
          • 21 Disposal of Damaged and Rejected Parts Procedures
        • PACKING AND SHIPMENT
          • 22 General
        • MARKINGS
          • 23 General
          • 24 Nameplate Markings
          • 25 Other Markings
        • INSTRUCTIONS
          • 26 General
    • APPENDIX A (INFORMATIVE)
    • APPENDIX B (INFORMATIVE) SAFETY MARKING TRANSLATIONS
    • APPENDIX C (INFORMATIVE) CELL AND MODULE PERFORMANCE AND SAFETY CHARACTERIZATION