The second edition of UL1973 was released on February 7, 2018. It is a safety standard for energy storage battery systems in North America and a dual-country standard for the United States and Canada. The standard mainly covers various battery systems used for stationary, vehicle auxiliary power supplies, LER, photovoltaics, wind energy, backup power supplies, and communication base stations, and includes structural evaluation and test evaluation of energy storage systems, but this standard is only a safety standard. Does not include performance and reliability assessments.
The scope of UL1973 standard covers the following application batteries
1. Energy storage: photovoltaic power stations, wind power stations, UPS, household energy storage, etc.
2. Vehicle auxiliary battery (not including power drive battery)
3. Batteries for light-duty electric rails or fixed electric rail electric energy storage systems, not limited to chemical substances batteries
4. Contains various types of batteries, with unlimited chemical substances, including beta sodium batteries and fluid batteries
5. Electrochemistry
6. Hybrid battery and electrochemical capacitor system
Conventional test items of UL1973 stationary energy storage battery:
1. Overcharge
2. Short Circuit
3. Overdischarge Protection
4. Temperature and Operating Limits Check
5. Imbalanced Charging
6. Dielectric Voltage Withstand
7. Continuity
8. Failure of Cooling/Thermal Stability System
9. Working Voltage Measurements
10. Locked-Rotor Test
11. Input
12. Stain Relief/Push-Back Relief
13, Vibration
14. Shock
15. Crush
16, Static Force
17, Impact
18. Drop Impact (rack mounted module)
19. Wall Mount Fixture/Handle Test
20, Mold Stress
21, Pressure Release
22, Start-to-Discharge
23, Thermal Cycling
24, Resistance to Moisture
25, Salt Fog
26, External Fire Exposure
27, Single Cell Failure Design Tolerance
Information required for UL1973 certification:
1. Battery specifications (including rated voltage capacity, discharge current, discharge cut-off voltage, charging current, charging voltage, maximum charging current, maximum discharge current, maximum charging voltage, maximum operating temperature, overall product size, product weight, etc.)
2. Battery pack specifications (including rated voltage capacity, discharge current, discharge cut-off voltage, charge current, charge voltage, maximum charge current, maximum discharge current, maximum charge voltage, maximum operating temperature, overall product size, product weight, etc.)
3. Photos of the inside and outside of the product
4. Circuit schematic diagram or system block diagram
5. List of key parts/BOM form
6. Detailed schematic circuit diagram
7. Bitmap of circuit board components
8. Assembly drawing or exploded drawing of battery pack structure
9. System security analysis (such as FMEA, FTA, etc.)
10. Dimensions or technical specifications of key components (such as heat sinks, Busbar, metal parts, transformers, main protection Fuse, etc.)
11. Coding of battery pack production date
12. Battery pack label
13. Battery pack instruction manual
14. Other documents required for certification
