custom LI-ion battery pack charging
custom LI-ion battery pack charging
(OP)
I have a similar project to thread658-127532.
First of all, I should let you know I am looking for a cost effective way of doing this, and I have absolutely no exp. with battery charging and circuit design... But I'm handy, have done IC projects from kits.
I would like to make a custom battery pack from surplus LI-ION batteries wired together to produce a greater voltage and Ah. The batteries are 7.2 volts, 2000 mAh, and I'll probably put them in sieries and parallel to get 21.6v 4000 mAh (6 bateries). Then DC-DC converters to get my desired voltages... 12v and 20v
The batteries are quite cheap ($3 can ea.) and I've seen some universal chargers that could charge the individual batteries, but nothing that could handle the whole pack.
Is there a product I could buy? Could I build my own charger relatively easily?or reverse engineer one?
any help/thoughts would be nice!
First of all, I should let you know I am looking for a cost effective way of doing this, and I have absolutely no exp. with battery charging and circuit design... But I'm handy, have done IC projects from kits.
I would like to make a custom battery pack from surplus LI-ION batteries wired together to produce a greater voltage and Ah. The batteries are 7.2 volts, 2000 mAh, and I'll probably put them in sieries and parallel to get 21.6v 4000 mAh (6 bateries). Then DC-DC converters to get my desired voltages... 12v and 20v
The batteries are quite cheap ($3 can ea.) and I've seen some universal chargers that could charge the individual batteries, but nothing that could handle the whole pack.
Is there a product I could buy? Could I build my own charger relatively easily?or reverse engineer one?
any help/thoughts would be nice!





RE: custom LI-ion battery pack charging
htt
It should do the trick
RE: custom LI-ion battery pack charging
RE: custom LI-ion battery pack charging
Its not as simple as you may think. Safely and reliably charging Li-Ion batteries is a rather large project to be undertaken. There is a lot to consider with Li-Ion battery packs and charging them. Cell balancing, temperture protection, disharge rates/control, shelf life considerations, slight changes in battery chemistries and how to adapt to that, etc... As others have stated this is something to be approached with care. I am familiar with the complexity involved - not first hand, but pretty close. If you have a large scale project, it would be worth it to consider looking at some products/companies that do it successfully and reliably. If you have a smaller project, just be very careful. Let me know if you have a larger scale project as I could put you in touch with some people.
Pete