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

Charging Technique

Charging Technique

Old 07-19-2004, 10:47 AM
  #1  
Tech Initiate
Thread Starter
 
Join Date: Dec 2003
Location: Denver, Co
Posts: 25
Default Charging Technique

I am back into Electric from a long time away so. I have some brand spanikin new smc 3300 batts and a pulsar charger. I have heard that charging the 3300s at 8 amps is good for high voltage but a little worried about heat charging at this rate. Should I charge the cells at 5amps an then re peak at 8amps. THANKS!
twelve_sparx is offline  
Old 07-19-2004, 10:49 AM
  #2  
Tech Rookie
 
Join Date: Sep 2003
Location: Los Angeles, CA
Posts: 16
Default

I've been told to not charge nimh batteries at more than 3 amps. Nimh batteries should not get hot.
TC3xRacer is offline  
Old 07-19-2004, 11:36 AM
  #3  
Tech Regular
iTrader: (9)
 
losixxx's Avatar
 
Join Date: May 2004
Location: omaha Ne
Posts: 299
Trader Rating: 9 (100%+)
Default

not over 3 amps??????????????????

I CHARGE MINE AT 7 AMPS
losixxx is offline  
Old 07-19-2004, 11:55 AM
  #4  
Regional Moderator
 
UnderDaHill's Avatar
 
Join Date: Feb 2004
Location: Omaha, NE
Posts: 975
Default

Surge Battery Matching has a good FAQ about charging GP3300 ni-mh batteries.

http://www.surgebatterymatching.com/FAQs.htm
UnderDaHill is offline  
Old 07-19-2004, 11:59 AM
  #5  
J-P
Tech Regular
 
J-P's Avatar
 
Join Date: Mar 2004
Location: London U.K.
Posts: 291
Default

the higher you charge them the better they may go in the short term, you will shorten the life of them, i've been told to charge at 5/6 amps and peak them at 7 amps,

but people will always have different ways of chargingbut this works for me,

my $0.02 worth

J-P
J-P is offline  
Old 07-19-2004, 12:21 PM
  #6  
Tech Regular
 
SlobbaTech's Avatar
 
Join Date: Jun 2003
Posts: 423
Default

I just charge them at 5.0amps with .05 peak detect then if pack isn't very warm or has sa for more then 15minutes I'll repeak before the race.
SlobbaTech is offline  
Old 07-19-2004, 12:35 PM
  #7  
Tech Adept
 
Join Date: Jun 2004
Location: SoCal, USA
Posts: 221
Lightbulb

I charge my 3300 5 amps then when your race starts to begin I bump my batteries like 7-8 amps for like 30 to 45 secs. So it will have some punch during the race. and make sure you dont over heat the cells!
TCRacerPro is offline  
Old 07-19-2004, 12:40 PM
  #8  
Tech Elite
 
PitCrew's Avatar
 
Join Date: Sep 2003
Location: Seattle Indoor Raceway
Posts: 2,129
Default

For stock, charge at 6 amps.
For mod, charge at 5 amps.

Use .05 delta for average room temp. If you are outdoors and its hot (80+f), go with .03 If its very cold, go .07

It is important for the pack to be "WARM" but not "HOT". The cells being warm decreases the IR because the chemical reaction happens quicker inside of the cell, releasing more energy over a shorter period of time (car goes faster)

7 amps will give a slight increase in voltage, and as long as you don't overcharge, it "MAY" not significantly reduce the life of the pack, but I don't like to chance my money like that.

If your going to do high amperage charge, set you delta peak at its minimum. At that rate, they can go from warm to way too hot in a hurry.
PitCrew is offline  
Old 07-19-2004, 02:08 PM
  #9  
Tech Initiate
Thread Starter
 
Join Date: Dec 2003
Location: Denver, Co
Posts: 25
Default

NICE! thanks guys very helpfull!
twelve_sparx is offline  
Old 07-19-2004, 05:10 PM
  #10  
Tech Adept
 
MrEs's Avatar
 
Join Date: Sep 2003
Location: Melbourme, Australia
Posts: 170
Default

i charge at 6 for club meets, 6.5 for big race events,
MrEs is offline  
Old 07-19-2004, 05:31 PM
  #11  
Tech Master
 
UCHEATULOSE's Avatar
 
Join Date: Dec 2002
Location: birth place of oval! daytona beach!
Posts: 1,083
Default

you bought a new SMC pack yet you failed to go to there web site for charging and caring info? WOW! 6 amps for stock and 19 turn 5 amps for bashing and mod racing..danny (smc) likes to get the batts around 140 deg before hitting the track! use the net to your advantage grasshopper!
UCHEATULOSE is offline  
Old 07-19-2004, 05:48 PM
  #12  
Tech Elite
 
speedxl's Avatar
 
Join Date: Jun 2003
Location: Portland Oregon.
Posts: 3,894
Default

katfish why didnt you tell them you charge at 10 amps!
speedxl is offline  
Old 07-19-2004, 05:49 PM
  #13  
Tech Elite
iTrader: (1)
 
JusBox's Avatar
 
Join Date: Sep 2003
Location: Central VA
Posts: 2,170
Trader Rating: 1 (100%+)
Default

Originally posted by TC3xRacer
I've been told to not charge nimh batteries at more than 3 amps. Nimh batteries should not get hot.
you were told wrong. follow the directions your battery matcher gives.
JusBox is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.