Lithium Batteries UL1642 vs. UL2054: What's the Difference?

UL certification for lithium batteries generally falls into two categories: ul1642and ul2054.

UL1642: For Lithium Battery Cells

UL1642 is a safety standard developed by Underwriters Laboratories Inc. (commonly referred to as UL), first issued in October 1985. It is one of the most widely recognized international standards for evaluating the safety and reliability of lithium battery cellsunder various fault conditions.

Key Test Items for UL1642 Include:

1. Room temperature short-circuit test

2. 55°C short-circuit test

3. Overcharge test

4. Crush test

5. Impact test (heavy object)

6. Mechanical shock test

7. Vibration test

8. Thermal abuse (oven) test

9. Temperature cycling test

10. Altitude simulation test

11. Projectile test

UL2054: For Lithium Battery Packs

UL2054 applies to lithium battery packs, including both primary (non-rechargeable) and secondary (rechargeable) types used as power sources in products. These battery packs may consist of one or more electrochemical cells connected in series or parallel to convert chemical energy into electrical energy.

Key Test Items for UL2054 Include:

Electrical Tests:

1. Short-circuit test

2. Overcharge test

3. Abusive overcharge test

4. Over-discharge test

5. Limited power source test

Mechanical Tests:

1. Crush test

2. Impact test

3. Acceleration test

4. Vibration test

Additional Tests:

1. Battery pack enclosure test

2. Drop impact test

3. 250N force static pressure test

4. Mold stress-relief test

5. Fire exposure test

6. Projectile test

7. Environmental testing

8. High-temperature test

9. Temperature cycling test

UL Listing Mark Categories

UL certification marks are divided into three main categories based on the target market:

1. UL Listing Mark:

 The most commonly used mark. Found on a wide range of products including electrical appliances, computing equipment, ovens and heaters, fuses, power boards, smoke and carbon monoxide detectors, fire extinguishers and sprinkler systems, personal flotation devices (like life jackets and lifebuoys), bulletproof glass, and thousands of other products.

2. C-UL Listing Mark:

 Indicates compliance with Canadian safety standards. Seen on products such as electrical and computing equipment, vending machines, home security alarm systems, lighting fixtures, and more.

3. C-UL US Listing Mark:

 Indicates compliance with both U.S. and Canadian safety requirements.

Validity of UL Certificates

UL certificates do not have an expiration date. They are maintained through regular factory inspections and certificate maintenance fees. Factory audits are conducted quarterly, and audit records are required for ongoing certification.