UL 1973, 3rd Edition, February 25, 2022-UL standard storage for safe batteries for stationary and power-assisted power applications or for applications such as UPS. These systems shall be installed in accordance with NFPA 70, C22.1 or other applicable installation specifications.
These requirements also cover battery systems defined in this standard for light electric rail (LER) applications and fixed rail applications such as rail substations. These systems can be installed in railcars or in sheltered fixed locations, such as rail substations. These battery systems can utilize the regenerative braking of the train as a source of energy for recharging and are intended to be directly or indirectly connected to railway power lines. These battery systems are designed to balance the load during peak hours, act as an energy storage device during regenerative braking of the train, and act as an emergency power source to move the train to the nearest station during power outages.
These requirements also apply to batteries used in vehicle auxiliary power supply (VAP) systems, which are used in recreational vehicles and other vehicles to provide power for various applications such as lighting and appliances. These batteries are not used for traction power in the vehicle, because the traction power battery will be evaluated according to the UL/ULC 2580 and UL/ULC 2271 to be suitable for the intended power application.
Appendix B of this standard includes requirements specific to the sodium-beta technique. Appendix C of this standard includes requirements specific to flowing electrolyte technology. Annex H of this standard includes specific requirements for vented and valve-regulated lead-acid and nickel-cadmium batteries. Annex I to this standard includes specific requirements for mechanically charged metal-air batteries.
This standard evaluates the ability of a battery system to safely withstand simulated abuse conditions. This standard evaluates the system according to the charging and discharging parameters specified by the manufacturer.
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