R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 12-23-2007, 01:28 AM   #226
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

For those of you who expect the EnerG cells to have the same reliability as the older generation NiMH cells your wrong. There is no way to make the voltage as high and the IR as low and have the cells not selfdischarge fairly fast.

I can say that the EnerG cells selfdischarge a bit slower than the IB cells and that when they do go below 1 volt they don't lose as much runtime but they do lose some.


I believe we can release a cell that doesn't have the fast selfdischarge issue but this cell would have lower capacity and lower voltage with higher IR. I don't think many of you would like to give up the speed.
Danny/SMC is offline   Reply With Quote
Old 12-23-2007, 01:30 AM   #227
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by Island Losi View Post
oops.....forgot to mention, im running mod. 3.5 motors on a large 800ft long track. so runtime is very improtant.
In mod classes I would discharge the pack down to .90 per cell then put 600 seconds of charge back in the pack when it's cooled down. This amount of charge should be good for 2 weeks.
Danny/SMC is offline   Reply With Quote
Old 12-23-2007, 05:38 AM   #228
Tech Addict
 
Island Losi's Avatar
 
Join Date: Apr 2007
Location: Barbados
Posts: 473
Trader Rating: 3 (100%+)
Default

when u say 600s of charge u mean charging them for 10min, right?
__________________
Yokomo|SpeedPassion|McgooCreative|TeamOrion|FusionPower|Futaba|Spektrum|RP|Trinity|Protoform
Island Losi is offline   Reply With Quote
Old 12-23-2007, 06:12 AM   #229
Tech Rookie
 
Join Date: Feb 2004
Posts: 11
Default

yes.........
ntron1 is offline   Reply With Quote
Old 12-23-2007, 08:22 AM   #230
Tech Champion
 
Still Bill's Avatar
 
Join Date: Jan 2004
Location: Reno, NV
Posts: 7,236
Trader Rating: 12 (100%+)
Default

Thanks Danny for that heads up.

I have been going with 900-950 seconds per your instructions in the old 4200 battery packs. And that has usually been good for a week.

600 seconds...good for up to two weeks...will be welcome.
__________________
Constantly evolving CRC WGT and WGT-R/T...Carpet & Asphalt...All thanks to Team CRC.

And a pair of Associated B6 buggies for turf and clay tracks.
Still Bill is offline   Reply With Quote
Old 12-23-2007, 08:55 AM   #231
Tech Champion
 
Still Bill's Avatar
 
Join Date: Jan 2004
Location: Reno, NV
Posts: 7,236
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by stiltskin View Post
Thanks. Are any of these preferred over the others?
Over the past year and a half, I have gone from using the following for discharging and balancing...
1) GFX and Novak Smart Tray (good performance);
2) GFX and DPD (Fair performance until DPD started giving questionable data)
3) MM CTX-D II (failed upon 2nd use & immediately after return from repair)
4) Deans light bulbs (20A) and Novak Smart Tray II (very good performance)

Anyone want to buy a broken CTX-D II??? Still has the plastic protective film on the screen...LOL.
__________________
Constantly evolving CRC WGT and WGT-R/T...Carpet & Asphalt...All thanks to Team CRC.

And a pair of Associated B6 buggies for turf and clay tracks.
Still Bill is offline   Reply With Quote
Old 12-23-2007, 11:56 AM   #232
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Yes 600 seconds is 10 minutes but after looking at my test sheets I noticed that some cells are getting close to 1 volt after 3 weeks with 1200 seconds.

Actually for 2 weeks to be on the safe side I would go with 900 seconds. I'm not sure if we can say that 1 week equals 400 seconds based on 3 weeks with 1200 seconds as the slefdischarge doesn't seem to be linear.

I'm in the process of testing selfdischarge rates and how long charge actually stays in the cells before they get below 1 volt and get damaged. This test will take some time as I need to let the weeks go by.
Danny/SMC is offline   Reply With Quote
Old 12-23-2007, 12:36 PM   #233
Tech Apprentice
 
Join Date: Dec 2007
Posts: 89
Default

i take care of my nimh batteries in a fashion similiar to the ones posted above.
charge at 7 amp
pulse disharge after race
then tray them down to 0.09v
put back 500mhs
store them till next week race,i run the packs once a week,and i tray to 0.08 before race.
last season i have been using ib 4200,and i found out that:
i will cycle the new packs on gfx...6 amps.....35 amp dicharge.
after 5-6 weeks of race,i will cycle them again on the gfx.
on almost all my packs,the voltage will go up,the ir will be lower and i will lose only like 10 sec run time which is not a big deal.
so the numbers of a used pack for 5-6cycles will have a better numbers then a new pack ,yet the new one on the track will always be faster then theolder one,lap time wise.and this is not 1 or 2 packs,this is a repeated pattern.
any one noticed that or have some info to why?
trackpower is offline   Reply With Quote
Old 12-26-2007, 09:28 AM   #234
Tech Master
 
Join Date: Nov 2007
Posts: 1,001
Trader Rating: 27 (100%+)
Default

So have you guys tried these batteries yet? What do you think.
C_Money is offline   Reply With Quote
Old 12-26-2007, 02:53 PM   #235
Tech Fanatic
 
Join Date: Feb 2005
Location: SRS, AZ
Posts: 962
Trader Rating: 17 (100%+)
Send a message via AIM to TMR CHASSIS
Default

Quote:
Originally Posted by C_Money View Post
So have you guys tried these batteries yet? What do you think.
I have 2 packs and they have over 20 cycles on them now and nothing but great #'s on and off the track.

Raymond
TMR CHASSIS is offline   Reply With Quote
Old 12-26-2007, 05:43 PM   #236
Tech Elite
 
wallyedmonds's Avatar
 
Join Date: Jul 2006
Location: Brampton ont canada
Posts: 3,662
Default

havent run them yet but iv gone through them on my GFX
4 cells
with my ib cells the ave discharge V is about 4.70,on these Ener-G cells it's well close to 5.00 V
dont know if this is good or not but im sure they will work good on the track.
discharge at 35 A
to E i use a ctx-d
wallyedmonds is offline   Reply With Quote
Old 12-26-2007, 08:51 PM   #237
Tech Apprentice
 
Join Date: Dec 2007
Posts: 89
Default

Quote:
Originally Posted by wallyedmonds View Post
havent run them yet but iv gone through them on my GFX
4 cells
with my ib cells the ave discharge V is about 4.70,on these Ener-G cells it's well close to 5.00 V
dont know if this is good or not but im sure they will work good on the track.
discharge at 35 A
to E i use a ctx-d
wow thats a lot of average voltage diffrence.
was the run time close in the 2 packs?
trackpower is offline   Reply With Quote
Old 12-26-2007, 09:36 PM   #238
Tech Master
 
Verndog's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jun 2007
Location: PPDBillet.com USA
Posts: 1,845
Trader Rating: 16 (100%+)
Default

Quote:
Originally Posted by MOTHER FOCAR View Post
verndog he is not talking about exploding batteries? where in his post do you see mention of exploding cells? errrrrrrrrrr

he is asking if the new energ cells will self discharge on there own in your battery box and lose 45 seconds of run time in 2 weeks like the IB and EP cells do!
Really...so where in his post does it say that???....errrrrrrrrr.

Not in his post, nor the post he responded to thats where.

Most people are well aware of the fact that the low IR and high voltage cells are going to self discharge at higher rates then their predecessors, so the obvious choice for what "issues" means is cell failure...not discharge...errrrrrrrr
__________________
--->Dial-a-Grip for TC6
Kevin -- PPDBillet---TC6---Exoray 008
---Team Hoarders---
Verndog is offline   Reply With Quote
Old 12-27-2007, 02:24 PM   #239
Tech Elite
 
wallyedmonds's Avatar
 
Join Date: Jul 2006
Location: Brampton ont canada
Posts: 3,662
Default

Quote:
Originally Posted by trackpower View Post
wow thats a lot of average voltage diffrence.
was the run time close in the 2 packs?
yes but dont remember what the times where did not really care about that to much.
wallyedmonds is offline   Reply With Quote
Old 12-27-2007, 02:40 PM   #240
Tech Elite
 
Join Date: Nov 2004
Location: Kansas City
Posts: 2,446
Trader Rating: 13 (100%+)
Send a message via AIM to David Alberico Send a message via Yahoo to David Alberico
Default

Would the Tekin Battery nurse be a good tool for these cells?
David Alberico is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
SMC ener-G 4600 crabboy Australia For Sale/Trade 2 07-14-2008 03:17 AM
Brand new Ener-G 4600 6 cell packs John Tag R/C Items: For Sale/Trade 3 04-17-2008 05:18 AM
BRAND NEW XPRESS 4600 ENER-G 6 CELL PACKS Sigearhead R/C Items: For Sale/Trade 3 02-09-2008 03:43 AM
Ener-G 4600 6 cell packs John Tag R/C Items: For Sale/Trade 27 02-06-2008 03:35 PM
Ener-G 4600 6 cell pack John Tag R/C Items: For Sale/Trade 1 12-27-2007 03:32 PM



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 08:03 PM.


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