Today’s applications requires you to have a global presence and you are looking for a excellent performance battery with IEC 62133 evaluations but did you know that UL 2054 certified batteries which are standard of safety for household and commercial applications, can assist you by providing a more competitive performance?

Confidence in Reliability

By using a battery tested and certified to UL 2054, you can gain insight and confidence that your battery pack should operate safely during normal and fault conditions for the full life cycle of your product. It also allows the use of the UL Mark on your certified product.

The Value of the UL Mark

UL represents integrity and trust for product safety and quality worldwide, building on its mission of working for a safer world since 1894. UL’s 30+ year history with batteries is globally known and the UL Mark is widely accepted as the benchmark in safety.

Bridging the Gap

UL certification of a battery offers a way to bridge the gap between IEC 62133 and UL 2054 by performing a pre-assessment program to UL 2054 during a formal IEC 62133 evaluation. Utilizing the undamaged packs from your IEC 62133 evaluations, UL runs a sampling of UL 2054 tests focused on the ones that are typically compliance concerns and provide you the results on how your battery packs performed. This increases confidence in the ability of a UL 2054 certified battery.

Tests done during a UL 2054 Certification:

Short-Circuit Test: Tests are to be done at 20 ± 5°C (68 ± 9°F), and at 55 ± 2°C (131 ± 4°F). The lithium cells are to reach equilibrium at 20 ± 5°C (68 ± 9°F) or 55 ± 2°C (131 ± 4°F) as applicable, before the terminals are connected. The lithium batteries shall not explode or catch fire. The temperature of the exterior cell or battery casing shall not exceed 150°C (302°F) for lithium chemistries.

Abnormal Charging Test: The lithium battery is to be initially charged using a constant current charging mode with a current limit of three times the highest current I_c, particularized by the battery manufacturer until the maximum specified charger output voltage is reached. Charging duration is the time required to reach the manufacturer’s specified end-of-charge condition plus seven additional hours.

The batteries shall not explode or catch fire. For lithium battery pack samples, tests shall not result in chemical leaks caused by cracking, rupturing, or bursting of the internal cell casing.

Abusive Overcharge and Forced Discharge Test: Lithium batteries are to be subjected to a continuous charging current at ten times the C5 amp rate, using a supply voltage satisfactory to maintain the ten times C5 amp rate throughout the duration of the test. During the trial, the temperature is to be marked on the internal cell casing of each sample. Also the positive and negative terminals of the sample are to be connected with copper wire with a resistance load of 80 ± 20 m ohms. The battery is to discharge until a fire or explosion is obtained, or until it has reached a completely discharged state and the cell case temperature has returned to ±10°C (±18°F) of ambient temperature.

Mechanical Test and Impact Test: A lithium battery is to be crushed between two flat surfaces. The force for the crushing is to be applied by a hydraulic ram or a similar force device. The flat surfaces are to be brought in contact with the cells, and the crushing is to be continued until an applied force of 13 ± 1.0 KN (3000 ± 224 pounds) is reached. Once the highest force has been obtained, it is to be released. Also A test sample lithium battery is to be placed on a flat surface. A 15.8 mm (518 inches) diameter bar is to be located across the center of the sample. A 9.1 ±0.46 kg (20 ±1 pound) weight is to be dropped from a height of 610 ±25 mm (24 ±1 inch) onto the sample;

Vibration Test: A lithium battery is to be constrained to simple harmonic motion with amplitude of 0.8 mm (0.03 inch) [1.6 mm (0.06 inch) total maximum excursion].The recurrence is to be varied at the rate of 1 hertz per minute between 10 and 55 hertz and return in not less than 90 nor more than 100 minutes.

Drop Impact Test: Three samples are to be dropped from a height of 1 m (3.28 ft), so it strikes a concrete surface. Each sample is to be dropped three times. The samples shall not explode or catch fire.

The sample shall be examined 6 hours after testing and shall not vent or leak and the integrity of the protective devices shall be maintained.

Fire Exposure Test: Each test sample cell or battery is to be placed on a screen that covers a 102 mm (4 inches) diameter hole in the center of a platform table. The screen is to be constructed of a steel wire mesh having 20 openings per inch (25.4 mm) and a wire diameter of 0.43 mm.

The screen is to be mounted 38 mm (1-1/2 inch) above a burner. The fuel and airflow rates are to be set to provide a bright blue flame that causes the supporting screen to glow a bright red. The sample is to be heated and shall remain on the screen until it explodes, or the cell or battery has ignited and burned out. It is not required to secure the sample in place unless it is at risk of falling off the screen before the test is completed. When required, the sample shall be secured to the screen with a single wire tied around the sample.

So if you are looking for a battery with not only long cycle life, uninterrupted discharging performance, fast charging capability, higher energy density, but also if you need a lithium battery which will give you worry free operation, and less stress regarding the safety, EverExceed lithium iron phosphate batteries are the best choice for you, because EverExceed LFP batteries are UL 2054 certified and they guarantees you absolutely NO FIRE, NO EXPLOSION!