Battery Charging Circuit Simulation
Interactive demonstration of current limiting in battery charging circuits
Real-time Calculations
Charging Current:
7.0A
Terminal Voltage:
11.5V
Voltage Drop (Series R):
108.5V
Power (Series R):
759.5W
Power (Battery):
80.5W
Purpose of Series Resistor
A series resistor in a charging circuit controls the current drawn from the external source. Without this resistor, the current flow would be extremely high and dangerous, potentially damaging the battery and circuit components.
Terminal Voltage
Terminal voltage is the actual voltage measured across the battery terminals during charging. It differs from EMF due to internal resistance and the direction of current flow.
Key Formulas
I = (Vsupply - EMF) / (Rseries + rinternal)
Vterminal = Vsupply - (I × Rseries)
Presistor = I² × Rseries
Pbattery = I × Vterminal
