Info on Turnigy Accucel 6
11-25-2009, 11:00 AM
#181
RCAccessory has just started selling adapters - these are cell specific not an adapter board type adapter. I believe this would adapt your Hyperion to the Accucel-6. They also show extensions...
http://www.rcaccessory.com/Hyptoalign2s.aspx
http://www.rcaccessory.com/Hyptoalign2s.aspx
12-01-2009, 10:49 PM
#182
Tech Adept
iTrader: (6)
Okay, thanks for the tips. I think I will go the EBay route as well. One more queston on the Hyperon. I have a brand new one for my 1/18th car that is an 1800. The guy at the hobby store said I could charge it at 5A instead of the typical 1C. Something about new technology . . . . . It also said I could go up to 5A right on the box. I mentioned that to the guys at the track and they told me they wouldn't do it. Thoughts?
Another question more related to this thread. I assume I can use the balance plug that fits my SMC 5000. It plugged right in, I haven't had problems to date, and can see what is going on each of the 2 cells.
Another question more related to this thread. I assume I can use the balance plug that fits my SMC 5000. It plugged right in, I haven't had problems to date, and can see what is going on each of the 2 cells.
12-02-2009, 05:26 AM
#183
5A or 5C? 5C would be 5x1.8 = 9amps, 5a is (5/1.8) little less than a 3C charge rate. Either way, if the Hyperion's instructions said 5a, I wouldn't hesitate to follow their recommendation.
Early on when lipo 1st started to get popular in surface RC, those early gen lipos did show a definite loss in cycle life as you increased charge rates from 1C to 2C and higher. These newer gen or new tech lipos reputedly still show a decrease in cycle life, but its far, far smaller and acceptable to the manufacturers as far as a working cycle life. You're always safe at 1C (1.8a), but can charge higher if manufacturer allows - it's done to reduce charge time. All my current lipos are 1C, but my next ones will be capable of higher charge rates and I plan to charge at at least 2C with them.
SMCs use the JST-XH balance conn and thats what the Accucel-6 (or 8) is made for.
Early on when lipo 1st started to get popular in surface RC, those early gen lipos did show a definite loss in cycle life as you increased charge rates from 1C to 2C and higher. These newer gen or new tech lipos reputedly still show a decrease in cycle life, but its far, far smaller and acceptable to the manufacturers as far as a working cycle life. You're always safe at 1C (1.8a), but can charge higher if manufacturer allows - it's done to reduce charge time. All my current lipos are 1C, but my next ones will be capable of higher charge rates and I plan to charge at at least 2C with them.
SMCs use the JST-XH balance conn and thats what the Accucel-6 (or 8) is made for.
12-02-2009, 06:20 AM
#184
My 5000mah 14.8v Hyperion's are marked at up to a 5C charge rate. I don't think there is a charger available that does that yet? 
Mine will do a 2C charge rate right now, that's about as much as I feel safe with currently.
Amain ProTek LiPo's are also rated fro 2C charge rates.
Charging a battery in around 30 minutes is fast enough for me.
Mine will do a 2C charge rate right now, that's about as much as I feel safe with currently.
Amain ProTek LiPo's are also rated fro 2C charge rates.
Charging a battery in around 30 minutes is fast enough for me.
10-29-2010, 03:34 PM
#185
I am newto lipo's just bought a accucell 6 and 2 turnigy 5200 30c batteries. To do a balance charge do you charge at a lower amp or could I just go 5 amps. And do lipos take more of a charge than what there rated at like the older batteries did? And to get it to shut off set the mah to the 5200 or does it have a different way to sence and shut off?
10-29-2010, 04:24 PM
#187
I am newto lipo's just bought a accucell 6 and 2 turnigy 5200 30c batteries. To do a balance charge do you charge at a lower amp or could I just go 5 amps. And do lipos take more of a charge than what there rated at like the older batteries did? And to get it to shut off set the mah to the 5200 or does it have a different way to sence and shut off?
The lipo charge protocol will shut down charging based on voltage unless a mah limit is reached. If your max mah is set high enough, the charger will terminate the CV phase (2nd part of lipo charge) when the voltage falls low enough. The capacity cutoff is intended for NiMhs. I don't use one when charging lipos.
Some lipos are underrated, but what is prob happening is they are just built with slightly larger cells than the label calls out. You won't get very long life if you overdischarge a lipo to the point that you're replaceing more than about 80% of the capacity. If you have a true 5000mah, your cutoff should be set such that you recharge them, about 4000mah is replaced.
10-29-2010, 07:08 PM
#188
so any tips on setting up charger setting wise? I have 5200 30 c 7.4 volt. How close do the cells have to be one battery has a 3.88v and the other cell is 4.18 will they equal more after a few cycles?
10-29-2010, 07:20 PM
#189
With this charger, there's not a lot to it, set capacity either off or at ~120% of label capacity (6200mah - though I prefer off) and charge at 5amps. That's as close as you can get unless you have the late on that goes to 6amps. If it does, set at 5.2amps for a 1C charge.
Those cells should be closer than that, no more than half that difference. Did your lipo start with a low cell? To help get the cells in balance, you go th e other way and charge at low rate, like 1amp - the idea is to give the balancer time to get them equalized. You do balance charge?
The best thing you could do is charge the low cell directly by itself and bring it up to full voltage. This is not straightforward and you either have a special charger that does it this way, or you wire thru the balance connector and charge the low cell that way. It takes making a connector and ID'ing which 2 pins on the balance connector are the low cell.
Those cells should be closer than that, no more than half that difference. Did your lipo start with a low cell? To help get the cells in balance, you go th e other way and charge at low rate, like 1amp - the idea is to give the balancer time to get them equalized. You do balance charge?
The best thing you could do is charge the low cell directly by itself and bring it up to full voltage. This is not straightforward and you either have a special charger that does it this way, or you wire thru the balance connector and charge the low cell that way. It takes making a connector and ID'ing which 2 pins on the balance connector are the low cell.
10-29-2010, 07:27 PM
#190
I just got batteries in mail today got the cheap battery checker and show the same difference as the charger. Once I replaced the ends with a deans I put it on the charger in balance mode and those were the readings. I turned off the mah limit off and now have it running at 1amp in balance mode.
10-29-2010, 07:43 PM
#191
OK, cool, if they behave like they should, you should see the cell voltage get closer together. It may be as simple as just this one slow balance charge. The way your post read it sounded like this lipo had seen some use....
Actually with them being new, I'd be worried about the high voltage cell, they should have arrived with ~3.7-3.8v/cell. If this charge doesn't look like its doing any good, discharge it (drop the high cell down to ~3.8v) and then put it back to charging.
Actually with them being new, I'd be worried about the high voltage cell, they should have arrived with ~3.7-3.8v/cell. If this charge doesn't look like its doing any good, discharge it (drop the high cell down to ~3.8v) and then put it back to charging.
10-29-2010, 08:17 PM
#192
they are brand new. What charger and adapter would I need to equalize them as one cell at a time. will try a discharge if they don't look any better. what should the discharge cut off be?
10-29-2010, 08:22 PM
#193
This is the one I have - only the balance wires plug in and then the charger charges the lipo cells individually. It has a cig lighter plug in I just cut off and replaced with bullets so I can plug it into my PS.
http://www.hobbycity.com/hobbycity/s...idProduct=2055
Accucel-6 has a 5watt discharge limit so it'll be extremely slow.....aim for the lower voltage cell not going below ~3.5v while on discharge, the resting voltage shouldn't go below 3.7v/cell, take whatever that gives you with the higher cell.
http://www.hobbycity.com/hobbycity/s...idProduct=2055
Accucel-6 has a 5watt discharge limit so it'll be extremely slow.....aim for the lower voltage cell not going below ~3.5v while on discharge, the resting voltage shouldn't go below 3.7v/cell, take whatever that gives you with the higher cell.
10-30-2010, 04:16 PM
#194
Well kind of good news after setting to 1 amp charge my 2 cells are much closer the high one 4.2 has stayed the same and the low one is now 4.11 so a difference of .09 where it once was .30 . so low and slow worked. Can I discharge it down to 3.8 and do another one maybe at 1.5 or 2 amps to get them closer or stay with the 1 amp for another cycle?
10-30-2010, 04:38 PM
#195
Thats sounds like a plan. Watch the cell voltage at the higher charge rate, if they seem to be drifiting farther apart, I'd go back to 1amp.
If it doesn't show improvement on this next cycle, I run it and let it dishcarge that way at higher rates and then see where imbalance is after charging. 0.09 is a lot better than it was, but they should be closer that they are, about half of that would be good.
If it doesn't show improvement on this next cycle, I run it and let it dishcarge that way at higher rates and then see where imbalance is after charging. 0.09 is a lot better than it was, but they should be closer that they are, about half of that would be good.