#Arduino li ion battery monitor how to#

For this purpose we have used two LM317 ICs, one is used to control the voltage and the other is used to limit the current. The main objective of our 12V power supply circuit is to control the voltage and current for the battery so that it can be charged in the best possible way. The complete schematics of this Battery Charger Circuit are shown below: This circuit will provide a Regulated DC Power Supply from the AC mains and will work as AC-DC Adapter I have previously created a Variable Power Supply with High current and voltage output. This Lead Acid Battery charger circuit can also be used to charge your mobile phones, after adjusting the voltage and current according to mobile phone, using the POT. The current can be adjusted based on the present Ah rating of the battery. Keeping this in consideration this, small homemade charger will be able to provide you variable voltage and variable current. Current greater than this may harm the battery resulting in reduced battery life. So for a 7 Ah battery the charging current should be around 0.7 Amps. The charging current of a battery is recommended to be 1/10th of the Ah rating of the battery. Now after complete discharge the battery percentage should be around 10.5, this is the time for us to charge our batteries. The Ah (Ampere hours) of each battery may vary based on the required capacity, a 7 Ah battery for example will be able to provide 1 Amps for a duration of 7 hours (1 Amps *7 hours = 7 Ah). Most of the lead acid batteries in the market are 12V batteries. Let's start by understanding few basic things about a Lead Acid Battery so that we can build our charger more efficiently. This project will save yourself from investing in a battery charger and help you to extend your battery life.

#Arduino li ion battery monitor how to#

Most of our electronics projects are powered by a Lead Acid battery, in this project let us discuss how to recharge this lead acid Battery with a help of a simple circuit that can be easily understood and built from home.