Battery management system, it basically balances and monitors the cells. No battery likes being taken past 90% DOD or depth of discharge. That said its not imposible to do so and I have done it myself.
Lipos (good ones anyway) are rated at 2000 cycles at 80% DOD. 3000 cycles at 70% DOD The point with lipos is to never let them get under 80% or you will kill them. Keeping in mind that lipos have a much better voltage curve, at 80% they will still be putting out near full voltage. As with leads the voltage sags dramatically as you draw current from them. Thats why you need a BMS because there really is no way to tell when the batteries are getting to 80% DOD and the bms should kick in and shut them off to prevent damage. Personally I would be using these http://currentevtech.com/Lithium-Batteries/Headway/Headway-40160S-16ah-cell-LiFePO4-p42.html if I was to go lipo. Chris. b On Mar 31, 12:10 am, [email protected] wrote: > In a message dated 3/30/2011 3:14:06 A.M. Eastern Daylight Time, > > [email protected] writes: > > Much better in most ways. Weight, power density, cycle life. > > Cons spendy, need to be very carefully looked after (a BMS is > essential for 2 or more batteries) and discharge rates can be lower > then some Lead acids. > > Chris. b > > BMS? what's that > > Chris, > _Odyssey Slipways_ (http://hometown.aol.com/odysseyslipways/index.html) -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
