Simple Charger with cutoff

396

08:47:44

Acid Battery Charger with automatic cut off using LM 393 comparator and relay. 

adjust the variable resistor to set the limit of the acid battery minus .1v so when the  acid battery will be charge at 12v. example, your acid battery is 6v, adjust the variable resistor to 5.9v.

published 8 years ago

BillyT

8 years ago

The circuit is basically correct, the theory on batteries and battery charging needs a bit of a brush up. A 12V lead acid battery when charged and not connected to anything floats along at 13.2V. A constant voltage battery float charger for a lead acid battery is set to13.8V. A multimode battery charger, charges a lead acid battery to 14.2V then drops back to a trickle charge, (ideally of 1mA per amp hour of battery capacity). A 6 Volt battery is approximately half, and a 24Volt battery twice these voltages the trickle charge rates remain the same.

cdane

8 years ago

Thank you for your thoughts about battery theories BillyT. Could you help me out to this? To make this circuit work when charging acid battery is to set the charger to 14.2v and the comparative is set to 13.2v to trigger the relay?

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