Technical Paper
Real-Time Deployment Strategies for State of Power Estimation Algorithms
2024-04-09
2024-01-2198
Lithium-ion cells operate under a narrow range of voltage, current, and temperature limits, which requires a battery management system (BMS) to sense, control and balance the battery pack. The state of power (SOP) estimation is a fundamental algorithm of the BMS. It operates as a dynamic safety limit, preventing rapid ageing and optimising power delivery. SOP estimation relies on predictive algorithms to determine charge and discharge power limits sustainable within a specified time frame, ensuring the cell design constraints are not violated. This paper delves into two scenarios for SOP estimation in a high-power lithium-ion battery (LIB) pouch cell. The first scenario investigates a cell operating under voltage constraints at a high State of Charge (SOC), focusing on comparing the power limits with experimental data. This investigation aims to maximise regenerative braking at high SOCs.