UL 1973 test is a standard safety test for battery systems used in stationary, vehicle auxiliary power and light rail (LER) applications. The test standard was developed by Underwriters Laboratories (UL) to ensure the safety and reliability of the battery system under actual conditions of use. Here are some key information and highlights from the UL1973 test:

1. UL1973 test range

UL1973 tests battery systems covering a variety of application scenarios, including but not limited:

• energy storage: such as photovoltaic power station, wind power station, UPS, household energy storage, etc.

• vehicle auxiliary battery (excluding traction battery).

• batteries for light rail or fixed rail electrical energy storage systems.

• is not limited to chemical substances, including various types of batteries, such as sodium ion batteries, flow batteries, etc.

UL 1973:2022 Test Items

• High rate charging test of
• over-drop overload test
  Over discharge test

• Temperature rise test of

• Unbalanced charging test

• Withstand voltage test of

• Grounding continuity test

• Water cooling system failure test of

• Operating voltage measurement test

• Ball Hit Test

• Thermal stress test of

• Pressure release test

• Temperature cycle test

• Moisture resistance test for

• Salt spray test