Operation
27
Charging time
Charge time is often of little consequence when the battery is used in a standby operation. An
example of this is when the battery is used to supply the starting system of a diesel generator. During
normal operation, the battery is at full capacity and the battery charger is used to maintain the float
voltage of the battery. The battery is only drained when the generator is called to start. As the
generator has a DC charging alternator fitted, the battery is quickly recharged when the generator is
running. Should the generator stop before the battery is fully recharged, the battery charger continue
sto recharge the battery until it is fully charged.
Typically a battery will charge from flat to 80% capacity in 16hrs when when charged at C/10.
For example charging a 50Ah battery for 16hrs at 5A will charge the battery to 80% of its full capacity.
Remember to take into account any other standing load such as control panel requirements when
calculating how much power is ‘left’ to charge the battery.
6.1.3 BOOST MODE
Boost mode is operated automatically or by activation of the digital input (if configured to perform this
function). This raises the battery charger voltage to the boost voltage setting. It will stay in boost mode
until the current drawn from the charger drops below 75% of the rated output, it will then go into a
timed run-on charge.
The battery charger will go back into boost mode, if the charge voltage is detected to drop below 1.8V
per battery cell.
6.1.4 TEMPERATURE COMPENSATION
If temperature compensation is enabled through configuration, and remote temperature sensor is
connected, the output voltage automatically varies by a configured mV per cell per 1°C deviation from
20°C, within the range of -20°C to 60°C. Increasing temperature give decreasing outputs and
decreasing temperatures give increasing outputs.
The battery temperature will be measured by a temperature sensor (2 wire PT1000 sensor) which will
be placed on the battery
To Next Page
Loading...
