Protection Circuit and Balancing charge

[Umibuta]

I have been looking for a Protection Circuit for a 11.1V battery pack but I have not come a cross any that says it will balance charge (e.g this one). Do all protection circuits for packs come with balancing capability?

Thanks

 

[VidPro]

there they call the POST balance function Equilibrium , and they have them there. but it is indeed equilibrium and that is not the same as balance charging, but it will "work". they drain off to get the cells re-matched in voltage.

with a balance connection put on the protection you show right there, and a charger that does balance charge , you have the ability to view the voltages of every cell item outside of the "pack" which IMO is far superior. just depends where you want to go today. i prefer less junk going on on inside the pack, that has any possibility for failure, and your not suppsed to DEPEND on protection to be doing the charge stopping anyways, which can still occur when things get WAY off.

without a charger that connects to each cell or parelell set individually (when possible) the charger does not KNOW for a fact what is going on with 3 batteries through 2 wires, so its still blind. with a balance charger and discharge function, you can actually test for discharge too, better to check the state of the cells all the way around.
balance chargers no longer cost an arm and a leg, and a cheap balance charger is better than a cheap Universal li-ion THING,

http://www.batteryspace.com/pcmwith...lgaugefor111vli-ionbatterypackat10alimit.aspx
the "equalibrium " equivelent at the same location.

 

[Umibuta]

Double post

 

[Umibuta]

Thanks Vidpro,

I will actually be using the battery pack in an enclosure which I will not open to charge. And I do not want too many leads sticking out of the box. The circuit you linked is exactly what I was looking for, thanks. I will charge battery using the Accucel 8150 charger. I am not very familiar with Li-ion, can you advise if this is the way to connect? Your circuit shows 11.1V, is it alright to use 3S2P, do the number of batteries matter?

Cheers