R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 02-16-2002, 05:58 AM   #1
Tech Master
 
Alvin's Avatar
 
Join Date: Aug 2001
Location: Singapore, Jurong East
Posts: 1,654
Default Prepping NiMH for zapping?

Hello,
What's the procedure to discharge/prepare Sanyo 3000 cells before zapping? With NiCADs we can drop 'em on a tray; what's the way for Nimhs, Sanyo 3k's in particular? Thanks!

Regards,
Alvin
Alvin is offline   Reply With Quote
Old 02-16-2002, 08:36 AM   #2
Tech Master
 
ChristopherKee's Avatar
 
Join Date: Feb 2002
Location: Northern Virginia
Posts: 1,005
Trader Rating: 28 (100%+)
Default

If it's a maintenence zap like the DCX3000, just get the cells as close to .6 each as you can. If you go below this even zapping will not save all of them. Hit them with like 50 - 60 and then cycle them after the zapp. Seems Ni-Mh don't responde as well to zapping as Ni-Cd.

Good luck, hope nothing vents...

Christopher
ChristopherKee is offline   Reply With Quote
Old 02-16-2002, 08:45 AM   #3
Tech Master
 
Alvin's Avatar
 
Join Date: Aug 2001
Location: Singapore, Jurong East
Posts: 1,654
Default

Chris, how can I make 'em stay at 0.6V? It can hit the voltage while in the tray but once out, it rises very fast to around 1V.

Thanks!

PS: Been zapping at 25V, very successful for nicads. Guess I should try a higher voltage
Alvin is offline   Reply With Quote
Old 02-17-2002, 10:39 PM   #4
Tech Master
 
ChristopherKee's Avatar
 
Join Date: Feb 2002
Location: Northern Virginia
Posts: 1,005
Trader Rating: 28 (100%+)
Default

Good question, I'm usually more worried about them going under .6v. If you bring them down then zap em it seems to give it some improvement. Not as much as you see on the Ni-Cd's. I wouldn't be concerned if your meter shows them rising before zap.
ChristopherKee is offline   Reply With Quote
Old 02-18-2002, 02:47 AM   #5
Tech Regular
 
Join Date: Aug 2001
Location: Finland
Posts: 250
Send a message via ICQ to JesseT
Default

Now as we have a zapper thread I just might ask a question: How large capacitances or how long zap durations are used in the most common devices? The starting tension seems to be between 30-80V usually.

Last edited by JesseT; 02-20-2002 at 12:16 AM.
JesseT is offline   Reply With Quote
Old 02-18-2002, 03:12 AM   #6
Tech Elite
 
Trips's Avatar
 
Join Date: Aug 2001
Location: 360 Speedway
Posts: 2,251
Trader Rating: 16 (100%+)
Default

The following info came from Big Jim Greenemeyer:

"To maintenance zap a cell, you need about 60-70 volts DC and about a 10Kuf capacitor.

Initial zapping (which you only do once in the cells lifespan) uses about 100 volts and 40-50Kuf capacitors.."

Trips
__________________
MARSHAL!!
Trips is offline   Reply With Quote
Old 02-19-2002, 01:14 PM   #7
Tech Apprentice
 
Join Date: Sep 2001
Location: lakehood, ca. 90715
Posts: 90
Default

i use the dcx3000 and i zap my cells after the bulbs have gone out on my equalizing tray. i was pitting next to pat t (one of the integy drivers), and he told me to discharge your cells completely. the more charge left in the cell, the less effective the zap will be. you can even zap prior to charging w/o any ill effects.
diesel31 is offline   Reply With Quote
Old 02-19-2002, 10:52 PM   #8
Tech Master
 
Alvin's Avatar
 
Join Date: Aug 2001
Location: Singapore, Jurong East
Posts: 1,654
Default

Quote:
Originally posted by Trips
The following info came from Big Jim Greenemeyer:
"To maintenance zap a cell, you need about 60-70 volts DC and about a 10Kuf capacitor.
Thanks trips! I can't wait till i get my allowance
Alvin is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Prepping a Losi XXX-NT for racing - which engine? t0adman Nitro Off-Road 12 08-19-2008 10:44 AM
WTB: Matched 3700 Nimh up to 4700 Nimh smarking1212 R/C Items: Wanted to Buy 5 04-16-2008 10:33 AM
spektrum z590 servo,4200 nimh,3800 nimh and duratrax piranha peak chager nikkon R/C Items: For Sale/Trade 9 02-11-2008 06:19 AM
Race prepping a Revo??? BChiz Monster Trucks 1 06-25-2007 09:47 PM
Prepping new bearings - HELP! Stenchy Electric On-Road 1 02-15-2005 09:04 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 06:28 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