Failure Event - US, AZ, Surprise - 19 Apr 2019
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Overview
Event Details
| |
|---|---|
| Location: | US, AZ, Surprise |
| Capacity (MW): | 2 |
| Capacity (MWh): | 2 |
| Battery Module: | LG Chem [NMC] |
| Integrator: | AES/Fluence |
| Application: | Volt Reg., PQ, Solar int. |
| Installation: | Substation |
| Enclosure Type: | Prefab |
| Event Date: | 19 April 2019 |
| System Age (yr): | 2.1 |
| Extent of Damage: | Explosion |
| State During Accident: | |
| Description: | The cause was found to be an internal cell defect, which initiated a cascading thermal runaway event. Alarms and the clean agent fire suppression system activated but was not capable of preventing or stopping cascading thermal runaway in a BESS. Three hours after thermal runaway was intiated, firefighters opened a door to the battery container, agitating accumulated flammable gases and allowing the gases to contact a heat source or spark. Minutes later, an explosion occurred, injuring several firefighters. |
| Source: | APS Investigation Report |
| Additional Resources: | |
- Note: Missing values in this table reflect unknowns.
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