As Battery Energy Storage Systems (BESS) deployments surge globally – reaching 45 GW operational capacity in Q2 2023 – a critical question emerges: Can conventional differential protection mechanisms handle the unique fault characteristics of lithium-ion battery arrays? The recent fire incident at a 300MWh California storage facility, reportedly triggered by protection relay miscoordination, underscores the urgency of this inquiry.
Imagine your electric vehicle showing 30% charge remaining, only to die unexpectedly. This daily frustration stems from inaccurate State of Charge (SOC) calibration – the backbone of battery management. With global EV sales projected to hit 17 million units in 2024 (BloombergNEF), why do even premium automakers struggle with ±15% SOC errors?
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