sla sealed lead acid battery charger

340

05:22:24

A seal lead/ ( 12v) acid battery charger.  Red LED lights on charging.
A discharged battery will take at least 180 mah. As the battery charges, using a constant voltage the current diminishes to 110mah or below as the battery reaches full charge (Green LED lit). A compariter is used to sense 2 currents across the 110 mOhm resistor. 
110mah to switch off charging and 180 mah or above is charging. The switch simulates the switching threshold, via the 75 ohm and 110 ohm resistors.. 
Note, this circuit works,  but in this simulator I had to add the diode on the output of the comparator, otherwise an error occurred. 

published 12 years ago

GenusCanisLupus

11 years ago

Is the switch supposed to represent the battery

Lucan01

10 years ago

This circuit is confusing, especially where to connect the battery yo.

creeek

9 years ago

OK, the battery is actually where the 2 switchable resistors are. The 75 and 110 ohm. The resistors are there to simulate when the battery is charging and charged. (when current drops to 110mA or less.

kumhare_amit

8 years ago

can you please draw a circuit to charge 4v lead acid battery from 220v ac power supply.

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