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Capacity estimation of lithium-ion batteries using invariance property in open circuit voltage relationship
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DOI：10.1016/j.conengprac.2026.107097.png)
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Abstract
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• The Capacity of lithium-ion batteries is estimated via an aging-invariant property of the relationship between the open circuit voltage and the state of charge (OCV-SOC). • The OCV-SOC curves are shown to be nearly invariant across battery aging when the SOC is calculated with the calibrated capacity. • Validation using OCV test data and dynamic discharge data exhibits high accuracy of the developed approach for capacity estimation.
Keywords:
Lithium-ion battery
Electric vehicles
Capacity estimation
Open circuit voltage
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