1 Scope

1.1 These requirements cover electrical energy storage assemblies (EESAs) such as battery packs and combination battery pack-electrochemical capacitor assemblies and the subassembly/modules that make up these assemblies for use in light electric-powered vehicles (LEVs) as defined in this standard.

1.2 This standard does not evaluate the performance or reliability of these devices.

1.3 This standard does not include requirements for the evaluation of EESAs intended for use in electric vehicles, such as on-road passenger vehicles intended for use on public roadways including highways and heavy duty off road vehicles such as battery powered ride-on industrial trucks, which are covered under the Standard for Batteries for Use in Electric Vehicles, UL 2580 / ULC-S2580.

1.4 This standard does not include requirements for evaluation of EESAs intended for use in light electric rail (LER) applications, which are covered under the Standard for Batteries for Use in Stationary, Vehicle Auxiliary Power and Light Electric Rail (LER) Applications, UL 1973.

Summary of Topics

This new edition of ANSI/CAN/UL/ULC 2271, Standard for Batteries for Use In Light Electric Vehicle (LEV) Applications, dated September 14, 2023 includes the following changes:

– Modification of the normal operation conditions and cycle number during Temperature Test; 5.2, 33.1, and Table 33.1

– Clarification of the scope to better distinguish what is covered under UL/ULC 2271 versus UL/ULC 2580; 1.1, 1.4, 5.2, 6.1, 6.2, 6.14, 6.25, 6.29, 6.32, 6.40, 16.2, 16.3, and 16.8

– Updates to Functional Safety criteria; 6.34, 6.35, 6.36 and Section 15

– Additional guidance on protection of corrosion between dissimilar metals; 5.2, 8.1, 8.2, 8.4, Annex B, B1, and Table B.1

– Addition of requirements for when repurposed batteries are used; 5.2, Section 16, 16.8, Section 46, Annex C, and Table C.1

– Addition of a High Rate Charge Test that evaluates the safety when charging at a rate higher than the specified maximum level, Table 18.1, Section 21, 21.2, Table 21.1, and Section 24

– Addition of the Overload Under Discharge Test to replace the "soft short" in the Short Circuit Test; 6.32, Table 18.1, 21.1, 21.2 and Section 26

– Addition of a Single Cell Failure Design Tolerance Test for large size batteries; Table 18.1 section Table 21.1 and Section 45.

– Replaced reference to UL 60950-1 with UL 62368-1 throughout the Standard.

– Replaced reference to ISO 12405-1 with ISO 6469-1 throughout the Standard.

– Corrections to Manufacturing and Production Line Testing and inclusion of a 100% check on active controls relied upon for safety; 17.2, 17.4.

– Addition of a normal operation limit check in Overcharge and Overdischarge Test; 23.3, 23.6, 27.2 and 27.5

– Addition of a grounding continuity test; Section 14 and Section 32

– Editorial revisions throughout the Standard.