Modeling and Simulation of Vehicular Power Systems - webfiles its ...
Modeling and Simulation of Vehicular Power Systems - webfiles its ...
Modeling and Simulation of Vehicular Power Systems - webfiles its ...
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5.6 Parameters measurement5.6.1 Open circuit voltageIn order to measure the open circuit voltage in different state <strong>of</strong> charges <strong>and</strong>temperatures, a constant current is drawn from a fully charged battery in time intervals.After each time interval the open circuit voltage <strong>of</strong> the battery is measured according tothe state <strong>of</strong> charge <strong>of</strong> the battery, shown in figure 5-6 .Once the open circuit voltage getsto a minimum value as given by the manufacturer [26] the battery is totally discharged<strong>and</strong> state <strong>of</strong> charge is zero. Doing some tests on one cell <strong>of</strong> 6 A.h Lithium-ion batteries atthe HVDC research center the battery open circuit voltage versus state <strong>of</strong> charge wasmeasured. The measurement results are shown in figure 5-7. The test was done in threetemperatures <strong>and</strong> with a low current.Figure 5-7 Test procedure for measurement <strong>of</strong> open circuit voltage32
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