A Battery Testing Toolbox for Real-World Operating Conditions

Abstract

Battery energy storage systems are being deployed at a high pace to accommodate the integration of renewable energy. Most systems are targeted to stay operational for a decade. As a result degradation information is crucial for most of the battery storage projects. As ageing depends on the operating conditions of the battery, it is necessary to characterize the battery over time. Although tracking of battery cell degradation is extensively done under lab conditions, the challenge today lies in the online assessment of battery ageing. Classically, the battery must be taken out of operation to perform the characterization. ENGIE Laborelec is studying how on-the-field characterization methods could be used without stopping the battery operation. ​​​​