R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 10-15-2003, 06:57 PM   #1
Tech Adept
 
Join Date: Mar 2003
Location: Melbourne, Australia
Posts: 143
Unhappy LRP Competition Charger Problem?

Hi all,

I recently acquired a LRP Pulsar Competition Charger and experiencing what I believe to be problems with it. The problem is that it won't stop charging even though it displays the mah greater than the what the battery is rated at (for example it would display 3200mah output for a battery rated at 2300 mah at it would be still charging)

I am using Linear mode of charging with a 12V battery 17ah & Delta peak is set 30.
I am charging, non-empty:
- 1 cell 1.2v C Cell Battery rated 2300mah NiMH (set at 0.3a charging)
- 6 cell GP 3300 mah NiMH (set at 0.5a charging)
- 5 cell 730mah NiMH receiver pack. (set at 0.1a charging)

Am I doing something wrong?

Thanks for your input guys

Sami
ttektek is offline   Reply With Quote
Old 10-15-2003, 08:13 PM   #2
Tech Elite
 
popsracer's Avatar
 
Join Date: Oct 2002
Location: "Hot, Sunny Southern California"
Posts: 3,120
Default LRP Competition Charger Problem?

ttektek;

The Charger detects the Peak voltage of a pack to determine when a pack is fully charged.
So no matter what the rated mAh of a pack, the Charger will not stop until the voltage is at maximum (peak).
popsracer is offline   Reply With Quote
Old 10-16-2003, 06:08 AM   #3
Tech Elite
 
Cole Trickle's Avatar
 
Join Date: Sep 2001
Location: Denmark / Europe
Posts: 2,571
Default Re: LRP Competition Charger Problem?

Quote:
Originally posted by ttektek
I am charging, non-empty:
- 1 cell 1.2v C Cell Battery rated 2300mah NiMH (set at 0.3a charging)
- 6 cell GP 3300 mah NiMH (set at 0.5a charging)
- 5 cell 730mah NiMH receiver pack. (set at 0.1a charging)
Your charging rates are really low - 0,5 amps on a six cell 3300 ?

At such low amps, my capacity meter even wont work - it's another charger though. At such low rates, the delta peak become very small, so it might be a problem to even detect it.

0,5 amps on a six cell GP3300 - dont you mean 5,0 amps?
__________________
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250
Cole Trickle is offline   Reply With Quote
Old 10-16-2003, 07:07 AM   #4
Tech Adept
 
Join Date: Mar 2003
Location: Melbourne, Australia
Posts: 143
Default

Thanks for replies,

Cole, I have always been told to charge at 10% of the amp rating of a battery to keep working as long as possible.

Am I charging at a too low amps? Is the a general rule with charging with these professional chargers? Is there a info sheet? Or can you tell what settings i should have for the 3 types of batteries I am charging.

Thanks

Sami
ttektek is offline   Reply With Quote
Old 10-16-2003, 07:45 AM   #5
Tech Master
 
berger's Avatar
R/C Tech Charter Subscriber
 
Join Date: Aug 2003
Location: Bathurst, Australia
Posts: 1,149
Trader Rating: 1 (100%+)
Default

There was a data sheet provided with mine, and it says for sanyo rc2400s to charge at 6.0A with a delta peak of 80Mv. And for 3300 Gp 5.0A with a 10Mv delta peak. Charging at that speed will take hours to charge!
berger is offline   Reply With Quote
Old 10-16-2003, 12:20 PM   #6
Tech Elite
 
Cole Trickle's Avatar
 
Join Date: Sep 2001
Location: Denmark / Europe
Posts: 2,571
Default

The higher the charge rate is, the better the charger should be.

So in many consumer products (shavers, toothbrushes etc.), the charge rate is quite low, thus they can produce the charger cheaper !

But... you got an high end charger And your batteries are made for these high rates

So you can safely charge your batteries at much higher rates ( if your power supply supports it )

This will both save a lot of time AND makes your car way faster. The higher amps, the more punch you'll get out of your car (at least to some extend).

I'll say: Charge your GP's at at least 5 amps. On this site, Promatch (who match batteries for living) have som recommendations. Promatch

Your TX pack: Divide the capacity by 2, so 3-400 mAmps. If you're in a hurry, go to 0,73 amps.

The single cell: It'll depend on brand and purpose, but with the same rules as for the TX pack, you'll be on the safe side.
__________________
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250
Cole Trickle is offline   Reply With Quote
Old 10-16-2003, 08:30 PM   #7
Tech Elite
 
lee82gx's Avatar
 
Join Date: Nov 2002
Location: Land Of peace , Malaysia
Posts: 2,304
Trader Rating: 1 (100%+)
Default

u wont peak as usual charging at 0.3A's
if this is what u want to hear,it is OK to reach 3200 for 2300 at 0.3A's
at such low charge rates,ur cells are mostly turning the current into heat,hence the longer time it takes to fully charge it.
lee82gx is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Turbo 35 GFX Charger & Pulsar 2 Competition Charger ZeroCool101 R/C Items: For Sale/Trade 6 02-20-2008 07:57 AM
Sphere Competition Problem or8ital Electric On-Road 16 07-03-2006 02:11 PM
LRP Pulsar Competition Charger Problem! 190mph Electric On-Road 5 11-10-2005 07:58 AM
LRP pulsar competition problem raceblast Electric On-Road 12 12-28-2004 10:11 AM
Quantum Competition 2 ESC Problem Stonzy Australian Racing 27 06-17-2004 06:13 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 04:16 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