R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 08-05-2006, 10:11 PM   #61
Tech Elite
 
PitCrew's Avatar
 
Join Date: Sep 2003
Location: Seattle Indoor Raceway
Posts: 2,129
Default

I agree that the concept of the ICC is very sound.

However, the volume of cells being matched and the increase in quality in manufacturing techniques has led to much more consistent cells. The main consideration from the charging end is capacity AND possibly more important to acheiving a fully charged pack of individual cells is Internal Resistance.
Cells with higher internal resistance will take longer to charge. But you will find in packs that are matched and labeled, that not only the runtime and average voltage are very close, but the IR is very close as well. It would be pretty hard to have cells matched by the prior two characteristics, but have widely varying IR numbers.

Therefore, if proper care is taken to equalize the cells prior to charging, then it is very likely that most cells in the pack are going to acheive a full charge without any one cell being overcharged. Not to say it can't and doesn't happen.

As packs are used, the individual cells will begin to depart and varying rates from their performance levels when matched. When this happens, then the ICC method would be more beneficial to the life of the pack. But, unfortunately at this point, the fact that certain cells have fallen off in performance indicates that those cells are losing runtime and their IR is increasing. One bad cell in a pack will make the whole pack run like crap.

It may unfortunately be time to get a new pack at this point. It all depends the particular level which you wish to be competitive. At the highest level, it is in your best interest to have packs that are more fresh..
PitCrew is offline   Reply With Quote
Old 08-05-2006, 10:34 PM   #62
Tech Elite
 
ottoman's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: wisconsin
Posts: 2,761
Trader Rating: 13 (100%+)
Default

I agree that only time will tell if the ICC works better or not. I have noticed a few "slightly" used ICC chargers on the for sale thread by the owners of EA Motorsports and Team Kwick and another I cant recall at the moment. Seems they bought and tested and put them up for sale .
I had this same conversation with the owner of a top end charger manufactuer... I wont give his name because I didn't ask him if our conversation was to be kept private... he told me that this concept has been around since the early RC days. He also told me that he did extensive testing using 6 separate (calibrated) chargers to charge each cell individually. They then discharged the packs and compared them to earlier numbers from a single charger charge... then they redid the tests in the reverse order. He said that the packs peaked with in a few seconds of each other with either method. They also ran them in cars with out telling the driver what method each pack was charged with. The results showed no improvement in discharge performance or track performance. Also he noted the chances of a false peak was greater on the individual cell charging method. I don't think he did any long term pack testing to see how the packs reacted over time... but he might have as I was only interested in the short term performance advantage that MIGHT be available with this method.
I will be watching closely to see how this works out in the next 6 months
ottoman is offline   Reply With Quote
Old 08-05-2006, 10:46 PM   #63
Tech Adept
 
butrflynlambie's Avatar
 
Join Date: May 2006
Posts: 192
Trader Rating: 3 (100%+)
Default High End Chargers

I purchased a GFX as I see many people at my track with real old models and they still swear by them. Yes, no temperature gauge for this charger that I am aware.

The GFX doesn't currently support the lipo like the ICE, but the competition site has an upgrade option coming soon for for this addition. Anyone know how much there are thinking of charging for the update?

Though I must agree the ICE is a way better selection for the money.

I believe the CDR is very well liked by the few individuals that I have seen with it.

I remembered the item being far more expense than the item listed here. Currently listed with a free cell tray.
389.00
http://www.towerhobbies.com/products.../futm4170.html

I was holding off for a while as I thought novak was to put out a new line of chargers, when they stopped selling the millenium. They came out with the ionic but I was expecting a new line or something competitive with the ICE.

Anyone know if novak intends to market a higher end charger?

Thanks for the info on the spintec. Can't wait to see this at the track?
butrflynlambie is offline   Reply With Quote
Old 08-06-2006, 12:45 AM   #64
Tech Fanatic
 
CHRIS CHAVEZ's Avatar
 
Join Date: Jan 2006
Location: Weekend Warrior
Posts: 962
Default

I vote for PROTECH!!!
__________________
"Dirt is for growing Potatoes"
TQ RC Racing
CHRIS CHAVEZ is offline   Reply With Quote
Old 08-06-2006, 02:00 AM   #65
Tech Champion
 
danjoy25's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2003
Posts: 5,149
Trader Rating: 37 (100%+)
Default

Im leaning towards the ICC after reading abit more about it. My reasons are:

1) Main charger (individual charging is a bonus)
2) external to charge stick packs when running a 2nd class like I do. (mini or 1/12)
3) also an equaliser which functions similar to a teamwave or CTX-D to an extent.
4) Motor run in is a bonus + having the free access to software upgrades is a bonus. You do have to spend on buying the cable but its a one off.

The way I see it is if your planning on having 2 chargers and a top end equaliser/discharge tray then you cannot go pass the ICC.
__________________
Awesomatix A800 & A800X/ Mugen MTX-5 / 3 Racing F113 / Kyosho RB5 / Kyosho Mini-Z
danjoy25 is offline   Reply With Quote
Old 08-06-2006, 06:17 AM   #66
Tech Elite
 
Join Date: Sep 2001
Posts: 3,117
Trader Rating: 69 (100%+)
Default

what about lipo chargers? any feedback on what is the best charger out there? plane/heli guys may have more info on this

duratrax ice? orion carbon advantage? any other high end chargers?
marvi is offline   Reply With Quote
Old 08-06-2006, 07:28 AM   #67
Tech Addict
 
Join Date: Jun 2003
Location: Olympia Fields, IL
Posts: 601
Trader Rating: 4 (100%+)
Default

Hyperion EOS 7i . Very good Lipo chargers, and it charges nimh up to 7 or 8 amps with adjustable delta peak. Cost is around $145.
PhatPat is offline   Reply With Quote
Old 08-06-2006, 09:20 AM   #68
Suspended
 
Join Date: Mar 2003
Location: Back That Thang Up!
Posts: 3,468
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by marvi
what about lipo chargers? any feedback on what is the best charger out there? plane/heli guys may have more info on this

duratrax ice? orion carbon advantage? any other high end chargers?
Astro Flight 109D

I had it and it works great.

around $130
403forbidden is offline   Reply With Quote
Old 08-06-2006, 12:21 PM   #69
Tech Champion
 
Join Date: Jun 2004
Location: St Louis
Posts: 7,868
Trader Rating: 198 (100%+)
Default

As one that has an ICC. We do not have true mathced packs. I have some packs from SMC, Full Throttle, and Brood. All with very good numbers and all numbers are at the same or 1-2 off each other. With the ICC they do not peak with in seconds of each other like some posted about. They do vary from cell to cell when they hit their peak voltage. So each cell does have its own charge curve.

I also have a CTX-D and on the discharge side of things. I see the same thing. Not all cells have the same discharge curve. When I discharge each cell by itself at 30 amps the cells are all very close. But when the same pack is ran on the track. The cells can be farther apart. It is reall interesting
__________________
Please become an organ donor.
www.donatelife.net
Custom decals and Sno-Tee'z, T-Shirts by Sno Camel
dodgeguy is offline   Reply With Quote
Old 08-06-2006, 03:02 PM   #70
Tech Elite
 
PitCrew's Avatar
 
Join Date: Sep 2003
Location: Seattle Indoor Raceway
Posts: 2,129
Default

Quote:
Originally Posted by dodgeguy
As one that has an ICC. We do not have true mathced packs. I have some packs from SMC, Full Throttle, and Brood. All with very good numbers and all numbers are at the same or 1-2 off each other. With the ICC they do not peak with in seconds of each other like some posted about. They do vary from cell to cell when they hit their peak voltage. So each cell does have its own charge curve.

I also have a CTX-D and on the discharge side of things. I see the same thing. Not all cells have the same discharge curve. When I discharge each cell by itself at 30 amps the cells are all very close. But when the same pack is ran on the track. The cells can be farther apart. It is reall interesting
It all has to do with IR. Cells with lower internal resistance will discharge faster on the track when very high loads are placed on them, upwards of 50 amps or more.
PitCrew is offline   Reply With Quote
Old 08-06-2006, 03:32 PM   #71
Tech Addict
 
mistercrash's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2002
Location: Guelph, Canada eh!
Posts: 721
Trader Rating: 5 (100%+)
Default

Anyone use the MRC SuperBrain 989? If so, what do you like and dislike about it?
__________________
No brain, no headaches.
mistercrash is offline   Reply With Quote
Old 08-06-2006, 08:51 PM   #72
Tech Addict
 
mistercrash's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2002
Location: Guelph, Canada eh!
Posts: 721
Trader Rating: 5 (100%+)
Default

Nevermind I think it's not released yet.
__________________
No brain, no headaches.
mistercrash is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hudy 1/8'th scale setup station pay today ships TODAY!! (MARYLAND) A Robinson. R/C Items: For Sale/Trade 2 05-27-2010 08:33 PM
Hudy 1/8'th scale setup station pay today ships TODAY!! (MARYLAND) A Robinson. R/C Items: For Sale/Trade 4 02-27-2008 05:17 PM
High end charger FS Jochim_18 R/C Items: For Sale/Trade 0 12-06-2006 07:50 PM
High end charger Tek Nickal R/C Items: Wanted to Buy 3 04-08-2004 09:06 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:49 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net