Mad Professor
Senior Member
Good day all.
I am looking at designing and building a picaxe based battery cell charger / capacity tester.
I have a bunch of 2.00volt wet cell nicad's, and 3.7volt lipo cell's.
For the charging side I would wish to charge the cells with the constant current then constant voltage (CC/CV), with adjustable current and voltage set points.
For the capacity tester side, I would wish to be able to discharge the cell via constant current, and once again adjustable current and voltage cut off points.
The 1st design I had in my head was going to be a small portable unit with an LCD for the menu etc, but the more I have thought about it, I have then been thinking it would be better to turn it into more of a bench unit, with serial output so that I can fully log the charging and discharging the bettery cells.
So I am going to need help and advice with most of the project, I don't want to be shown eveything I need, But I would like to be point the right way.
The 1st thing I have to look into is all the hardware that I will need to be able to do this.
So I know I will need to monitor both the voltage and current when charging or discharging the bettery cells.
Any advice or tips to help this project get started would be grate.
And if anyone has example circuit's for something like this that would also be grate.
Thanks for your time.
Best Regards.
I am looking at designing and building a picaxe based battery cell charger / capacity tester.
I have a bunch of 2.00volt wet cell nicad's, and 3.7volt lipo cell's.
For the charging side I would wish to charge the cells with the constant current then constant voltage (CC/CV), with adjustable current and voltage set points.
For the capacity tester side, I would wish to be able to discharge the cell via constant current, and once again adjustable current and voltage cut off points.
The 1st design I had in my head was going to be a small portable unit with an LCD for the menu etc, but the more I have thought about it, I have then been thinking it would be better to turn it into more of a bench unit, with serial output so that I can fully log the charging and discharging the bettery cells.
So I am going to need help and advice with most of the project, I don't want to be shown eveything I need, But I would like to be point the right way.
The 1st thing I have to look into is all the hardware that I will need to be able to do this.
So I know I will need to monitor both the voltage and current when charging or discharging the bettery cells.
Any advice or tips to help this project get started would be grate.
And if anyone has example circuit's for something like this that would also be grate.
Thanks for your time.
Best Regards.