|Jan 17, 2007, 12:13 AM|
Joined Dec 2006
Min safe voltage for 7.4V lipos?
Whats the minimum safe voltage you can drop a 7.4V lipo down to? Specifically I'm looking at the Stormlauncher and XPV lipos. Will they handle 5V and charge again with no issues? Thanks for the info.
|Jan 17, 2007, 07:47 AM|
You can run them down to 2.7V per cell (5.4V for a two cell) but you really should not. The deeper(lower) you discharge them then few number of cycles they will last.
If you use this link and take a few minutes to study post you should develop a better understanding.
|Jan 18, 2007, 08:14 AM|
At 3.2V V per celll under load the cell is approx. 95% depleted.. 1300*80%= appro. 1000 mAh and that amount apacity had been used when the test packs were at 10.5V (3.5V per celll under load).
In fact if you look at the Graph closely at 10.5V (3S pack) 1100 mAh had been discharged so in fact the pack was 84% discharged at this stage.
With 12C cont. and greater LiPolys any cut off below 3.2V per cell is really very risky.
How to read a CBA Graph
|Jan 18, 2007, 12:50 PM|
Joined Aug 2004
I too have a hard time understanding what hal woo is talking about. I may be putting words in his mouth (if so I hope he corrects me) but I think what he means by voltage clamp is a charging circuit that has a fixed voltage but a current limiting circuit to prevent over current when charging a fully discharge battery. If so this is usually know as a "Limited Current/ Constant Voltage" device.
|Category||Thread||Thread Starter||Forum||Replies||Last Post|
|For Sale||NIP E-POWER 20C 2s 540mah 7.4v Lipos||punkindrublik||Aircraft - Electric - Batteries & Chargers (FS/W)||0||Jun 18, 2007 02:52 PM|
|Discussion||Safe voltage for GWS edf motor?||Fallout||Power Systems||7||May 05, 2007 12:10 PM|
|Off Site||NEW ELECTRIC POWER 20-30C 2S 7.4v Lipos - E-Power||punkindrublik||Aircraft - Electric - Batteries & Chargers (FS/W)||3||Aug 03, 2006 03:04 PM|
|MM Flashback on 2S (7.4V) lipos and Himaxx 2025||markusj||Parkflyers||4||Nov 30, 2005 03:59 PM|
|ESC for 7.4V Li-ion battery||hty||Batteries and Chargers||1||Apr 26, 2004 03:31 AM|