2017 · 33 citations · 1 references
EngineeringAutomotive EngineeringElectrical EngineeringAutomotive ElectronicsElectric Vehicle EngineeringElectric Vehicle TechnologyBattery DiagnosticsBattery SystemsBattery TechnologyElectric Vehicle ElectronicsState EstimationState Of Charge EstimationBattery Health AssessmentBattery Health MonitoringBattery ManagementResidual Capacity AnalysisResidual Capacity AssessmentResidual Capacity EvaluationState Of Charge MonitoringState-of-health Estimation
The computation and monitoring of three key indices, namely, state of charge (SOC), state of health (SOH), and state of function (SOF) for EV (electrical vehicle) BMS (battery management system) are proposed in this work. Because most of SOC definitions are directly related to nominal capacity, the accuracy of residual capacity is doubtful. Therefore, the SOC is redefined by present maximum capacity to reduce the error of the SOC estimation. The measurement of the proposed SOC demonstrates that the maximum error is 0.334 %. Moreover, this paper also proposes SOF based on SOC and SOH to reveal the driving power of the system.
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