Using Arduino nano for phonebatterie charge controller  

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Vesa
 Vesa
(@vesa)
New Member
Joined: 3 months ago
Posts: 3
2019-09-10 10:10 pm  

I got  few new 3.7V phonebatteries (for Samsung I9100) and they would be nice power supplies for some of my projects with 3.3V Pro Mini's. Problem is that I don't have a charger for them.

I have old 5V phonechargers (1.5 - 2 amps) but as far as I know it's not a good practise to charge Li-ion batteries without a controller. I was wondering if I can turn a Arduino Nano, a optocoupler and a phone charger to a tablecharger for those batteries.

Any advice for that? Or will it just blow them all up and burn the house?

 

 


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casey
(@casey)
Trusted Member
Joined: 3 months ago
Posts: 87
2019-09-10 10:34 pm  
Posted by: @vesa

Any advice for that? Or will it just blow them all up and burn the house?

Not sure of the solution but get it right.  I once attached a charger to a 12 volt battery (probably NiCad) and it blew up like a balloon!  Houses have burnt down due to cheap imported battery driven products.  So use a charger that detects a full charge and turns itself off. Not sure if this is controlled by a voltage reading or a drop in the amount of current flowing into the battery.  I think they sometimes use a temperature sensor in some batteries packs that turns off the charger if the battery get too hot.

 


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