Transcription of Equivalent-Circuit Cell Models
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Equivalent-Circuit Cell Models
ECE4710/5710: Modeling, Simulation, and Identification ofBattery Dynamics2 1 Equivalent-Circuit Cell : Open-circuit voltage and state of charge We begin our study of battery Models by building up behavioral/phenomenological analogs using common circuit elements. The resulting equivalent circuit Models will be helpful in getting afeel for how cells respond to different usage scenarios, andareadequate for some application design as well. Ultimately, however, we will need a deeper physical understanding ofhow the cells work.
ECE4710/5710, Equivalent-Circuit Cell Models 2–7 The equivalent series resistance R0 for this cell is about 1.5m•, found as the infinite-frequency impedance. The low-frequency impedance is represented by the straight line at 45 , and models lithium diffusion in the solid particles.
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