R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 01-08-2005, 07:52 AM   #1
Tech Apprentice
 
Join Date: Oct 2004
Location: Orlando, FL
Posts: 76
Send a message via AIM to T-Money86mcss
Default Square cells instead of cylindrical

Why can't battery companies make us square cells instead of the cylinder-shaped ones that would fit better in the cars. I am not really sure how batteries are assembled and if this would be a problem, but it seems like it should be possible. Can you imagine how much nicer/easier they could fit in cars, and how much easier it would be to assemble packs if cells were rectangular!?
T-Money86mcss is offline   Reply With Quote
Old 01-08-2005, 08:13 AM   #2
Tech Fanatic
 
Chill Will's Avatar
 
Join Date: Oct 2003
Location: The Dirty South
Posts: 804
Default

It would also lower the center of gravity.
Chill Will is offline   Reply With Quote
Old 01-08-2005, 08:42 AM   #3
Tech Master
 
Rod M's Avatar
R/C Tech Elite Subscriber
 
Join Date: May 2003
Location: Sydney, Australia
Posts: 1,545
Trader Rating: 4 (100%+)
Default

I think this will happen once we move to Lipo or Ion technology,
Rod M is offline   Reply With Quote
Old 01-08-2005, 05:29 PM   #4
Tech Elite
 
Mr. Shookie's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2004
Location: The Wilderness
Posts: 4,711
Trader Rating: 9 (100%+)
Send a message via AIM to Mr. Shookie Send a message via MSN to Mr. Shookie
Default

Mutilplex and Hitec are working together to purduce a brick style Li-po pack that fits the dimentions of the current rc cars as to make CG the best it can be. They should have more info in the coming months. I bet at RCX they will have a release date (just what I am thinking). I think this is where we are heading anyway. From what I have read about Li-po it is becoming easier to charge them with the newer chargers i.e. Turbo's and Commanders and even the newer integy high end chargers are having the features nessasary to charge Li-po but they aren;t advertising it because they don't want the liability if the Li-po pack ruptures and causes injury. Give it another year and Ni-mh will become ni-cd's. Also the Multiplex/Hitec packs are going ot have the safty features to keep people from hurting them selves because of there own stupidity. Look at RC aircraft, been flying Li-po for some time now.....HHHHHHHHHHHHMMMMMMMMMM
Just my two cents.
Take Care & GOD Bless
Stephen <><
__________________
All who love the LORD JESUS I praise with you.1 Cor 10:31
Team HOLY Rollers (Team Manager)
The Church is a Hospital for Sinners not a Museum for Saints.
RcTech Feedback <>< RC Tech Subcriber #92
Mr. Shookie is offline   Reply With Quote
Old 01-08-2005, 05:45 PM   #5
Tech Master
 
DerekB's Avatar
 
Join Date: Nov 2001
Location: Southern California
Posts: 1,421
Default Re: Square cells instead of cylindrical

Quote:
Originally posted by T-Money86mcss
Why can't battery companies make us square cells instead of the cylinder-shaped ones that would fit better in the cars. I am not really sure how batteries are assembled and if this would be a problem, but it seems like it should be possible. Can you imagine how much nicer/easier they could fit in cars, and how much easier it would be to assemble packs if cells were rectangular!?
Tubes are radial and would have the same thickness of material from the core out. This is why most batteries are round.
__________________
Velocity RC Magazine
www.vrcmag.com
DerekB is offline   Reply With Quote
Old 01-08-2005, 05:50 PM   #6
Tech Champion
 
JDM_DOHC_SiR's Avatar
 
Join Date: Aug 2002
Location: Chula Vista, CA
Posts: 9,070
Trader Rating: 31 (100%+)
Didn`t

Panasonic come up with some odd shaped 3700 cells last year?? I remember seeing a post last year about them..??
-Dave
__________________
Ȼ4.5 Centro+α ◊ TRF 501ӽ ◊ TRF 502ӽs ◊ TRF 503 ◊ TRF 511 ◊ TRF 201ӽr ◊ TRF 211ӽ
B5m ◊ T5m ◊SC5m ◊ B64deez nutz
Speedway PAL ◊ SDRC ◊ Shop UFO ◊ SMC
JDM_DOHC_SiR is offline   Reply With Quote
Old 01-08-2005, 06:18 PM   #7
Tech Addict
 
Simon K's Avatar
 
Join Date: Aug 2001
Location: Wellington, New Zealand
Posts: 573
Default Re: Didn`t

Quote:
Originally posted by JDM_DOHC_SiR
Panasonic come up with some odd shaped 3700 cells last year?? I remember seeing a post last year about them..??
-Dave
I remember that...are they technically "Sub C" sized if they are square?
Simon K is offline   Reply With Quote
Old 01-08-2005, 06:28 PM   #8
Registered User
 
ritchie's Avatar
 
Join Date: Oct 2001
Posts: 2,044
Default

someone did or does make that type of battery. we used them in our hpi minis. so i would think just making them larger with more mh wouldn't be that big a deal.
ritchie is offline   Reply With Quote
Old 01-08-2005, 09:00 PM   #9
Tech Master
 
Tek Nickal's Avatar
 
Join Date: Jan 2004
Location: Earth
Posts: 1,301
Default

They could just add material to make it square. It doesn't seem hard.
Tek Nickal is offline   Reply With Quote
Old 01-08-2005, 09:49 PM   #10
Registered User
 
Join Date: Jun 2004
Location: ROAR HAD ME BANNED FROM RC TECH.
Posts: 2,025
Trader Rating: 2 (100%+)
Default

It would require creating a whole new group size of battery, as they would no longer be Sub-C in size. It would limit the cells to pretty much a specific group (RC racing) which would make the price of them totally sky rocket as RC is not the only application of the sub-c cell.

Many consumer markets use the sub-c cell, which helps keep the price "down" to what it is now. But squared cells would be larger, heavier, and require more material to build. Because of the technology the cells would not be flatter and keep the same amp hour rating. You'd basically have a big round core inside a larger metal case. Waste of material, added weight, etc, etc.

Also it would be much harder to insulate a rectangle cell. You couldn't shrink wrap it, the edges/corners would wear through pretty quick which could easily lead to short circuits. You'd have to insulate the batteries and encase them in something more durable, like plastic ... so at that point you might as well just make a square case for your entire pack.

I think cylinder shaped cells lend themselves to RC as they are pretty well. They index into the chassis keeping them from sliding around, and pack assembly is not hard. However I do think it would be pretty nice if we had packs that were 1/4" x 3" x 4-5" and still held 3-4 AH .. but slim NIMH packs like that typically only hold 700-1200 mAH.
Desolas is offline   Reply With Quote
Old 01-09-2005, 03:27 AM   #11
Tech Master
 
raving-monkey's Avatar
 
Join Date: Apr 2004
Location: yorkshire, england.
Posts: 1,818
Send a message via MSN to raving-monkey
Default

panasonic came out with some 3500's last year, i think they were on the shelves for about a month, if that.

but they were round at end end for about 4mm then they went square. they would be fine in cars like tc3, tc4, cgm etc where the batteries sit in a "tub" but where they are clamped down on a flat deck chassis they would be useless.
raving-monkey is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
F/S - 4 cells 6 cells IB4200 Batteries for TC or Trans Am Solara R/C Items: For Sale/Trade 5 08-11-2008 09:38 AM
2 packs Power push 3600 intel. cells,4 cells whynot R/C Items: For Sale/Trade 0 05-31-2005 09:01 PM
XRAY T1FK - RC12L3 - Serpent 710 - Surge Batteries (4-cells & 6-cells) and more XrayRacer R/C Items: For Sale/Trade 24 03-31-2005 03:19 PM
Shottky diode, what kind? Cylindrical... mxs Electric On-Road 5 08-26-2004 08:22 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 01:11 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