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Charging Regimes
There are a number of charging regimes used in industrial and domestic battery
charging equipment. They include: Contant Voltage often called Constant potential, Traction and Constant Current. Constant
potential chargers are used in standby and cycling application, constant current
chargers are used on Nicad or NiMH cells and Traction chargers are used on electric
vehicles such as fork lift trucks.
You can see the difference between all three methods by clicking the links
below to see an animated demo of each regime. Note that each animation
is a very close approximation of actual battery and charger performance.
The animation reflects a typical battery charger instrument panel displaying
DC Volts and DC Amps. By observing the instruments, you can see the relationship
between the battery/charger voltage and the charging current from which the actual
control function can be realised.
The regimes on these pages demonstrate the basic attributes of each charging
method. More complex techniques are sometimes applied, particularly to a constant
current charging system. A typical example is the switch tripping regime.
Each sequence is on a repeating cycle and starts with 21V displayed on the Voltmeter.
Constant Potential Demo:
Constant Current Demo:
Switch Tripping demo
Traction Demo:
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