Overview：

UL 2054 Ed.3 was released on November 17, 2021. As a member of the UL standard, MCM participated in the review of the standard, and made reasonable suggestions for the modification which was adopted afterwards.

Revised Content：

The changes made to the standards are mainly involved with five aspects, which are paraphrased as followings:

• Addition of section 6.3: General requirements for the structure of wires and terminals:

l The wire should be insulated, and should meet the requirements of UL 758 while considering whether the possible temperature and voltage encountered in the battery pack is acceptable.

l Wiring heads and terminals should be mechanically reinforced, and electrical contact should be provided, and there should be no tension on the connections and terminals. The lead should be safe, and kept far away from sharp edges and other parts that might harm the wire insulator.

• Miscellaneous revisions are made throughout the Standard; Sections 2 – 5, 6.1.2 – 6.1.4, 6.5.1, 8.1, 8.2, 11.10, 12.13, 13.3, 14.7, 15.2, 16.6, Section 23 title, 24.1, Appendix A.
• Clarification of requirements for adhesive labels; Section 29, 30.1, 30.2
• addition of the requirements and methods of Mark Durability Test
• Made Limited Power Source Test an optional requirement; 7.1
• Clarified the external resistance in the test in 11.11.

The Short Circuit Test was stipulated to use copper wire to short circuit positive and negative anodes on section 9.11 of original standard, now was revised as using 80±20mΩ external resistors.

Special Notice：

The expression: T_max+T_amb+T_ma was demonstrated wrongly in section 16.8 and 17.8 of the standard, while the correct expression should be T_max+T_amb-T_{ma ,} referring to the original standard.