Quote:
Originally posted by mothman
So metalman, are you suggesting that using CC/Cv with the PCM is better than pulse charger for LiPo? As I said earlier, Im concern about the life of the LiPo. Cant afford to buy $200-300 batts anymore..
And one more question about balancer, what type of balancer are you using? Can you suggest the best one for Polyquest LiPo?
Im also going to buy LVC but not sure which one is good. I was looking at the Kokam's (http://www2.towerhobbies.com/cgi-bin...?&I=LXJDJ0&P=7) and this (http://rcworldofplanes.net/prodView.asp?idproduct=49). Which one should I get? Is there any other accesories that I have to buy before I can use this LiPo system?
Sorry for all these questions but I really need some advice..
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Quote:
Originally posted by mothman
Thanks fearanloathing. just realized about the the KOkam's LVC is only for 4S. Seems like I have no option other than this one (http://rcworldofplanes.net/prodView.asp?idproduct=49). Has anybody try using this LVC? How does it performs? Or is there any other better LVC??
I dont really know about balancing. But I think the PCM unit that I bought can acts as a balancer while charging. Not sure though can someone confirm this?
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Balancers won't work well with the 109, as they limit the voltage to 4.20v (+/- .05v, depending onthe balancer). The PCM guard isn't actually a balancer at all, it just cuts the charge if a cell gets to 4.35v (which is too high).
I personally don't use a balancer (yet). I monitor my LiPos with a volt meter on the taps, and if a cell gets higher than the rest, then I will charge each cell individually. If I do get a balancer, it will be one that I make. This one would limit the max voltage to a user-settable voltage, and if the imbalance in a pack is too great, then it will cut the charge. The Thunder Power balancers (with the appropriate connector) would work well with Polyquest packs.
As far as LVC devices go, you have a lot of choices. I would never get anything that cuts off any lower than 3v per cell, and the FMA one cuts at 2.6-2.7v. The Li-Saver would work, but I have heard of a recent issue with it causing glitching. Right now, I am making LVC devices for 2s-4s Lipo (and possible 5s), that will cut at about 2.95v/cell, but will pulse the motor at about 3.05v/cell. The pulsing is noticable, as the car will sort of stutter. This means that the battery is done, it's time to take it in. If you are interested, let me know. I am asking $15 shipped to the U.S.