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PSL Projects : Dynamic Battery Modeling for System Study
Objective:
Modeling Standing Point:
Battery
Model Main Characteristics: Battery
Model Library:
Develop a set of battery models for battery-powered system simulations
Battery Type:
Li-Ion battery
Li-SO2 battery
Li-MnO2 battery
Zinc-Air battery
Alkaline battery
Generic battery
Focus on system-level simulations rather than exploring battery internal
physical processes or battery designs
Accurately capture the major relevant properties such as electric and thermal
characteristics
Avoid detailed calculations of internal electrochemical processes to save
computational cost
Nonlinear equilibrium potential
Rate dependence
Temperature dependence
Transient response
Thermal effects
Valid for both charging and discharging processes (secondary battery)
Battery Models in VTB
Model Example Li-Ion Battery:
Steady State Study
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The rate dependence of the battery voltage at currents of (from top to bottom) 0.28 A, 0.7 A, 1.0 A, 1.4 A and 2.8 A at a constant temperature of 23oC |
Battery voltage vs. SOD, at temperatures of (top to bottom) 45oC, 34oC, 23oC, 10oC, 0oC, -10oC and -20oC. The discharge rate is 0.7 A |
Transient Response Study
CDMA2 discharge test for a single cell of Sony US18650 Battery
Battery Dynamic Test (DST) for a single cell of Sony US18650 Battery
VTB schematic view of the circuit for simulating the battery charging characteristic
Battery model charging process validation
Model Example Li-SO2 Battery:
Friendly user interface of the Li-SO2 battery (Saft BA5590) model
Battery terminal voltages vs. discharging time, at
discharging currents (top to bottom) 1A, 2A, 4A, 6A, and 8A
Battery capacity vs. discharge current, at temperatures of (top to bottom) 328K, 293K, 273K, 253K, 243 K and 233K
Model Example Generic Battery:
The generic battery model can be easily modified to present any user defined battery by simply inputting the battery performance data though the model user interface without involving any model programming details.
Generic battery model with great flexibility
