R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-07-2002, 03:46 PM   #436
Tech Regular
 
purplepro3's Avatar
 
Join Date: Nov 2001
Location: Northern VA USA
Posts: 320
Default

rcracingfreak: Orion has a digital discharger that costs less than $100. it will discharge 30 amps (4.8v cut-off), 25 amps (5.1v), and 20 amps (5.4v).

Danny: when you say sanyo nimh, this includes older 3000 cells (yellow & green) right??? would you recommed the orion digital discharger i mentioned above??? would the 4.8v [email protected] amps hurt the cells????
purplepro3 is offline   Reply With Quote
Old 03-07-2002, 05:49 PM   #437
Tech Addict
 
D_Ames's Avatar
 
Join Date: Aug 2001
Location: Riverside, CA
Posts: 617
Trader Rating: 1 (100%+)
Send a message via AIM to D_Ames
Default

Thanks Purple...
I actually have a Tekin DIS350 discharger that discharges at 30 amps and is very nice. I just wanted to get a unit that would do it all but none of the new charger/discharger combo's(Integy/Reedy) discharge at 30 amps. The turbo35 is the only one I know of that does it all and its $400 and you still need a power supply.
D_Ames is offline   Reply With Quote
Old 03-07-2002, 08:12 PM   #438
Regional Moderator
 
Addict sa RC's Avatar
 
Join Date: Aug 2001
Location: Quezon City, Philippines
Posts: 557
Default

Integy has a 30amp discharger with a 5.4V cutoff for only ~$50. I have one and its indispensible.
Addict sa RC is offline   Reply With Quote
Old 03-07-2002, 08:21 PM   #439
Tech Regular
 
Aurra Sing's Avatar
 
Join Date: Aug 2001
Location: Santa Clara, CA, USA
Posts: 462
Default Lowest voltage

Hey.

I first used my 3000's successfully 2 weeks ago. I will use them again this weekend. Between the two weeks, I didn't do anything to them. They still had a partial charge from the run before.

I put them on my Millennium Pro (didn't have voltimeter) and read 8.5 volts (first pack) and 8.0 volts (another pack) at the very beginning. Question: How low voltage can the 3000HV's go down to without damaging it?
Aurra Sing is offline   Reply With Quote
Old 03-09-2002, 05:59 PM   #440
Moderator
 
Speedo's Avatar
R/C Tech Charter Subscriber
 
Join Date: Aug 2001
Posts: 3,431
Default

purplepro3- I think you would treat the older sanyo cells like any other nimh, just the HV's are different, I think.
Speedo is offline   Reply With Quote
Old 03-09-2002, 09:38 PM   #441
Tech Fanatic
 
rccarracer's Avatar
 
Join Date: Oct 2001
Location: Sydney, Australia
Posts: 926
Default

Thats my understanding.
rccarracer is offline   Reply With Quote
Old 03-11-2002, 04:25 PM   #442
Tech Addict
 
Join Date: Mar 2002
Posts: 593
Talking Thanks

I have read this whole thread. I learned a lot. I have not raced electric yet, but raced gas for one year and am doing gas and electric with my son this year. I have an XXXt and he has a XXX.

After I read this, I went home and built a "discharger" out of 10 3157 bulbs. They fit into a nice little circle. This is only 10 amps, but it helped me out a lot. I have a Fluke ocilliscope that will plot time Vs Volts with the screen width being full all the time. It shows min, max and average volts along with the graph. With my first try using 3,000 radio shack packs (its my first year ya I know rs is junk) to see how much capicity they had. First Pack: It had been charged for a couple of days: 5.8volts and dropping slowly for the first minute or so. Then it started to come up all the way to 6 volts or so after about the 3 minute mark. It went on for 8 minutes then died at 5.4 volts. Average volts 5.91. Most of these packs did the same thing. I let them cool and charged them at 4.5 amps 20 mv cut off ( that is .020 volts) and tried the same discharge again. WOW with a warm pack, started at 8.5 and went down fast at first then leveled off. 7 minutes, 6.36 average volts! This is nothing like the cells in this thread, but I sure did learn how to treat them!

I had a 1500 pack I thought was shot, so I tried that one too. 10 Amp discharge, 2mins 22 sec. I forget what the Av volts were. I charged it 4.5 amps, .040 volt cut off. and this time 3 mins 56 sec . What a difference. I have been way too kind to my packs

This also helps me understand why I could charge a dead 3,000 Nimh pack for a few minutes, bring it down to 5.4 then charge it. It gets the stuff in the battery going before it gets a full charge.

My 3,000 packs are still increasing capacity and average voltage (for the whole pack). Thanks again everyone for the education.
David Root
David Root is offline   Reply With Quote
Old 03-11-2002, 06:44 PM   #443
Tech Regular
 
rcruv's Avatar
 
Join Date: Jan 2002
Location: Los Angeles
Posts: 375
Default

Thanks for posting your experiment.
I think I'm now convinced that I should pick up a decent discharger and see if my packs get more punch.

rcruv is offline   Reply With Quote
Old 03-12-2002, 12:24 AM   #444
Tech Regular
 
Join Date: Aug 2001
Location: Finland
Posts: 250
Send a message via ICQ to JesseT
Default

Or build your own 30A discharger to save big bucks. If anyone is interested in how to make one, just let me know.
JesseT is offline   Reply With Quote
Old 03-15-2002, 08:37 AM   #445
Tech Elite
 
HarshGuy's Avatar
 
Join Date: Aug 2001
Location: Roseville, CA
Posts: 3,379
Trader Rating: 6 (100%+)
Default

Hey Danny ...one of my SMC packs seems to have "met it's maker", nothing wierd about it I was practicing yesterday cahrged it up worked fine the 1st time, threw my light bulbs with black box cuttoff after running it all fine and dandy the 2nd time I went to use it (prolly about 2 hours later) when I went to charge it says "peak detect to high" or something like that (T35 BTW) ...I start pressed past that only took about a 10 minute charge and it no workee. I tried cycling it this morning, same deal ...I didn't write the numbers down but IR was huge, only about 120 seconds runtime, stuff like that.

...any advice? ...BTW the other 6 packs I have purchased around the same time period (about 6 months ago) are still perfect & no probs.
__________________
http://www.arroyoc.com
http://www.gearchart.com
http://www.weracemountainbikes.com
HarshGuy is offline   Reply With Quote
Old 03-15-2002, 08:57 AM   #446
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

HarshGuy: Sorry to hear one of your packs died. Try and figure out if it's only one cell or the entire pack.

The RC3000HV is a great cell but it's still NiMH technology and maybe the cycle life of the cell isn't as good as nicads.
Danny/SMC is offline   Reply With Quote
Old 03-18-2002, 02:55 PM   #447
Tech Regular
 
quantum's Avatar
 
Join Date: Dec 2001
Posts: 351
Default

hi danny,
did you get the email i sent you two weeks ago?
please let me know!

thanks!



[email protected]
quantum is offline   Reply With Quote
Old 03-19-2002, 09:03 AM   #448
Company Representative
 
Danny/SMC's Avatar
 
Join Date: Oct 2001
Location: Elkton, VA
Posts: 3,097
Trader Rating: 2 (100%+)
Default

Possibly but you might want to send it again. I just have been really busy and sometimes I read emails and plan on responding later and then I forget.
Danny/SMC is offline   Reply With Quote
Old 03-19-2002, 09:10 AM   #449
Tech Rookie
 
Join Date: Mar 2002
Posts: 12
Default

HOW MUCH???
bigbadbullerboy is offline   Reply With Quote
Old 03-19-2002, 01:22 PM   #450
Tech Master
 
ChristopherKee's Avatar
 
Join Date: Feb 2002
Location: Northern Virginia
Posts: 1,005
Trader Rating: 28 (100%+)
Default

Danny -

Is SMC still rematching and rezapping cells? I have 6/6 cell packs of SMC 3000HV's that need to be re-zapped and matched.

I've beat the hell out of these packs and they all have over 50 cycles.

And if so, how much and do I need to clean off the lables and solder before sending them in...

What is the ususal turn around?
ChristopherKee is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
sanyo 3000HV ruftnik Rookie Zone 2 11-09-2003 06:05 PM
New Sanyo 3000HV PMR packs rayhuang R/C Items: For Sale/Trade 0 02-25-2003 11:18 AM
Sanyo 3000HV lilshortyc3 Electric On-Road 4 12-20-2002 02:34 PM
1 New Integy Sanyo 3000HV hohen711 R/C Items: For Sale/Trade 1 09-11-2002 01:31 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 12:35 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net