Disgusted by the prices and available features of ‘big’ power banks (like >100Wh big), I decided to make my own. Before I create a death machine, I’d be grateful for some insight if I’m going to do anything bad.
Basics
Expected outputs: 5VDC (+ USB PD) @ 5A, 12VDC @ 4A, direct BMS output
Configuration: 6S5P
to get easy 12V-like output
in total 315 Wh
1,35kg
Voltage: minimal 15V, nominal 22,2V, maximum 25,2V
Thanks for the tip. Unfortunately the cells I’d like to buy (cheap, high-energy, low-current) are out of stock :(
Anyway, the Allegro seller has quite a few acceptable reviews - some cells were 2600-ish instead of 2800mAh.
I think it will be more cost-effective to buy a few more, then check their real capacity and match them together. If it turns out to be really less than expected, I’ll just return them.
Just a hint. For the upgrade to the charger on the motorcycle, I’ve used the internals from some car PD charger. I’ve assumed it might be better than some cheap module. Maybe it would also be good for your use case.
