R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 10-05-2004, 08:58 AM   #1
Tech Adept
 
Join Date: Jul 2004
Posts: 201
Default Lowest Resistance Wire Connectors?

I was curious to know what everyone thinks is the lowest resistance battery/motor connection.

I currently solder my ESC wires to the battery using Deans bars (bent in an L shape), but i'm getting tired of lugging around my iron. I've heard that as you continually solder and desolder the wires you can add more resistance to the wire since the solder moves up the wire, not to mention the additional unnecessary heat to the batteries or other electrics.

I was considering soldering on a small eyeloop to the battery wires and tapping a small hole on the deans connector so I could screw down the eyeloop. This solution could perhaps provide less resistance, more convenience for battery changes, and less tools to bring to the track (or at least set-up).

Does anyone know if a clean connection (solderless) yet one that is firmly held into place is better than a soldered connection?

Also, Yes I've seen and used both Deans and Plug/Socket style connectors. I use saddle packs so using Deans connectors make the pack kinda gangly.....

Thanks for the reponse.
Electro-MAX RC is offline   Reply With Quote
Old 10-05-2004, 10:39 AM   #2
Tech Elite
 
edseb's Avatar
 
Join Date: Jan 2004
Location: Laguna Niguel, California
Posts: 2,421
Default

Deans have the lowest resistance for connectors, but that's still more than direct soldering.
__________________
RC Car Action Editor and Photographer
Carl Hyndman
edseb is offline   Reply With Quote
Old 10-05-2004, 10:57 AM   #3
Tech Elite
 
kufman's Avatar
 
Join Date: Feb 2004
Location: Elburn, IL
Posts: 3,428
Trader Rating: 6 (100%+)
Default

It is possible to make lower resistance connections without soldering, but it isn't easy. Considering that there are already 12 soldered connections in a battery anyway, two contact connections are not going to make a huge difference. Your loop connection idea is pretty good. You have to keep both surfaces clean and when they are bolted together they need to be tight. The use of Belville (I always though they were bevel) washers may help to keep things tight through heat cycling. Some of the motor connectors used on brushless motors are very good connectors and are better than deans. They are also separate from eachother so you will be able to use them on saddle packs.

Look at this

http://www.schulze-elektronik-gmbh.de/guide/gstv-e.pdf

The connector at the top of that page can be used without the shells. I have seen those plugs soldered directly to the battery terminals.
__________________
Brushes? We don't need no stinking brushes!!!
kufman is offline   Reply With Quote
Old 10-05-2004, 11:03 AM   #4
Tech Regular
 
Join Date: Feb 2004
Location: somewhere in the north of england
Posts: 347
Default

Get some corrally plugs they are the best for low restance connections. Unless you direct solder.
Smoking motor.. is offline   Reply With Quote
Old 10-05-2004, 11:20 AM   #5
Tech Adept
 
Join Date: Jun 2004
Location: Connecticut
Posts: 208
Default


Connector Resistance (ohms)
Tamiya / JST / Kyosho 1.2
Deans 0.55
Powerpole 0.75
Corally / Orion 0.75


http://www.schumacher.clara.net/cooling.htm


A bad direct solder connection will have a higher resistance than any of the connectors shown above
LeadFoot is offline   Reply With Quote
Old 10-05-2004, 07:05 PM   #6
Tech Regular
 
nam_tc3's Avatar
 
Join Date: Feb 2004
Location: Sydney, Australia
Posts: 347
Trader Rating: 1 (100%+)
Default

but shouldn't we also take into consideration that deans plugs require an extra 4 solder joints??

I think those results were measured directly from the connectors themselves rather than including the solder joints needed to use them.....

correct me if im wrong...
nam_tc3 is offline   Reply With Quote
Old 10-05-2004, 08:11 PM   #7
Tech Fanatic
 
Entropy's Avatar
 
Join Date: Feb 2003
Location: Singapore
Posts: 965
Default

I'd like to wager that connector resistance never did cost anyone the World Championship
Entropy is offline   Reply With Quote
Old 10-05-2004, 08:19 PM   #8
Tech Fanatic
 
Charlie O's Avatar
 
Join Date: Dec 2003
Location: Corona, Ca
Posts: 739
Default

I agree, a cold solder joint coming off could cost you the race!
Charlie O is offline   Reply With Quote
Old 10-05-2004, 08:24 PM   #9
Tech Addict
 
BadBoyRC's Avatar
 
Join Date: May 2002
Location: Northern Califiornia | Bay Area
Posts: 532
Trader Rating: 2 (75%+)
Default

Deans are good for regular racers and are convenient,, stick with those.. you have to consider that you can swap batts with your friends too.

for hardcore racing.. hard solder..

Too lazy to carry a soldering iron? Just mooch off a racing buddy.,.
Attached Images
File Type: jpg pinup1bmx2.jpg (34.5 KB, 648 views)
BadBoyRC is offline   Reply With Quote
Old 10-05-2004, 08:50 PM   #10
Tech Regular
 
nam_tc3's Avatar
 
Join Date: Feb 2004
Location: Sydney, Australia
Posts: 347
Trader Rating: 1 (100%+)
Default

just a thought....

V=I*R

deans connector R=0.0009ohms

Voltage(drop @ 30A) = 30A*0.0009ohms = 0.027V

Thats the same difference between a 1.178v pack and a 1.183 pack.....

People pay extra $20 for that same amount of difference when buying cells.......



But then again...i could have worked it out wrong.....

btw, im on both sides here....
nam_tc3 is offline   Reply With Quote
Old 10-05-2004, 09:36 PM   #11
Tech Elite
 
kufman's Avatar
 
Join Date: Feb 2004
Location: Elburn, IL
Posts: 3,428
Trader Rating: 6 (100%+)
Default

From measurements that I have made at work, a good solder joint has about 150 micro ohms of resistance (0.000150). There are 12 joints on the battery itself including the tabs soldered on to the end cells to make solder tabs. That is 0.0018 ohms for just the battery connections. The best connection is made without solder. So to take full advantage of your 1.180 cells you should not use battery bars. Just some food for thought.


FYI the chart found on this page

http://www.schumacher.clara.net/cooling.htm

Should probably have resistance measured in milliohms and not ohms. If it were ohms, deans would melt with 20 amps flowing. 20^2 * 0.55 = 220 Watts!!!
__________________
Brushes? We don't need no stinking brushes!!!
kufman is offline   Reply With Quote
Old 10-05-2004, 09:40 PM   #12
Tech Fanatic
 
pink pac man's Avatar
 
Join Date: Aug 2004
Location: RATED X RACING Canberra,Australia
Posts: 894
Default

i use deans on the motor and corralys on the b82rez and im always in the top 3 and every1 else uses solder conection ............................just use whatevers easyest exept for tamiya connectors or venom connectors
pink pac man is offline   Reply With Quote
Old 10-05-2004, 09:54 PM   #13
Tech Master
 
Join Date: Apr 2004
Location: San Jose California
Posts: 1,251
Default

Trinity R-Minus style connectors are my personal favorite (easy to use with saddle cars too)
The Black Kat is offline   Reply With Quote
Old 10-05-2004, 10:03 PM   #14
Tech Master
 
Speedie's Avatar
 
Join Date: Feb 2003
Location: Wisconsin
Posts: 1,844
Default

Deans connectors are hands down the best. I would rather have 4 good solder joints on my connectors than a solder joint that has been soldered and unsoldered dozens of times. Plus if my pack happens to pull my connector apart. I probably want to stop because something would be wrong. I do solder on my 12th scale tho for weight and room.
__________________
www.victoryhobbies.com Greenbay, Wisconsin
Speedie is offline   Reply With Quote
Old 10-05-2004, 10:29 PM   #15
Tech Regular
 
nam_tc3's Avatar
 
Join Date: Feb 2004
Location: Sydney, Australia
Posts: 347
Trader Rating: 1 (100%+)
Default

Quote:
i use deans on the motor and corralys on the b82rez and im always in the top 3 and every1 else uses solder conection
Not meaning to be rude...... but i dont understand why people make comments like that.......

Hara could use tamiya plugs and kick everyones butt............. but does that mean tamiya plugs are better and are of least resistance??

Quote:
I was curious to know what everyone thinks is the lowest resistance battery/motor connection.
I think that was the main question......
nam_tc3 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
wire and connectors? rcsnow2 Rookie Zone 9 10-16-2007 01:45 PM
Knock Off Deans Connectors And Wire tmaxxking R/C Items: For Sale/Trade 35 09-17-2007 12:01 PM
Cheap place to buy wire and connectors? LosiSuperTruck Electric On-Road 2 08-18-2005 09:54 AM
Electrically&Soldering challenged ISO 3-wire ESC & connectors Q and Tips&Tricks Tom G Electric On-Road 4 06-26-2004 09:37 PM
Lowest CG: V1RR Evo, MTX3, G4, R40? thefuzzclub Nitro On-Road 7 09-03-2003 06:33 AM



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 09:40 PM.


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