Arduino cell monitor

[Samd]

Nice work!

 

[circuitsmith]

300 mV is the difference between a depleted and a full battery.

I consider the difference to be more like 800mV: 3.4V(sagging under load)-4.2V

 

[izeman]

300 mV is the difference between a depleted and a full battery.

I consider the difference to be more like 800mV: 3.4V(sagging under load)-4.2V

depends on chemistry i'd say. 3.6 for a fully charged lifepo4 and 3.2 for an empty one. but for rclipo i#m with you. i would even say 1.2v if you talk about sagged voltage under full load.

 

[circuitsmith]

I'm getting ~0.2V sag max with my setup.
~10A per 5,000mah cell, rated for 20C discharge.

 

[dingo117]

Nice work!

Sorry for the worlds longest reply, but thanks! I thought i would pop on this forum again as im planing another build

 

[dingo117]

I guess my ideal cell monitor would have minimal power leeching on any particular cell so all drain is even or just very low. The other thing I would like to see is blutooth ability to andriod or ios for an app to show a cell is low at minimum, ideally seeing voltage of all cells would be great.

Sorry for the super late reply, did you ever get around to making/finding (a not super over priced) such a thing? I have played around with some wireless (2.4ghz) for arduino but mainly for cnc stuff!