R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 02-19-2009, 06:34 PM   #1
Tech Master
 
brickshouse's Avatar
 
Join Date: Feb 2009
Posts: 1,246
Trader Rating: 7 (100%+)
Default Li-po batteries

can someone please explain what all the numbers mean about the li po batteries?? 20c 25c 30cetc? 2s 6s? charge rate 1c? and the small set of wires coming out besides the battery leads???: This is all too new for me. Could you also recommend a good semi cheap charger for a 6 cell pack of these???? Do you need a different charger for the higher voltage li po batteries?? What do ya do when there is no leads coming from the batteries??

Last edited by brickshouse; 02-19-2009 at 06:52 PM.
brickshouse is offline   Reply With Quote
Old 02-19-2009, 07:13 PM   #2
Tech Adept
 
TNS Racing's Avatar
 
Join Date: Sep 2008
Location: NorthEast
Posts: 228
Default

check the other 10000000000000000000000000000000000000000000000000 threads that ask the same question
__________________
the true purple and yellow

Team Associated/ Seidel Racing/ Team Scream Racing/ Nike 6.0/ RC Madness
b4.1 novak gtb/ velociti 6.5r
b44.1 lrp sxx tc spec v2/ velociti 5.5r
TNS Racing is offline   Reply With Quote
Old 02-19-2009, 07:16 PM   #3
Tech Fanatic
 
gndprx's Avatar
 
Join Date: Dec 2005
Location: Fort Mill, SC
Posts: 791
Trader Rating: 18 (100%+)
Default

1C = 1 x Battery Capacity. i.e. a 5000mah pack has a 1C of 5A.

So a 1C charge for a 5000mah pack = 5A charge rate. 2C = 10A etc...

The high C value printed on the pack is the discharge rate. The higher the value, the higher discharge capability. 4000mah pack with a 30C discharge rate = 120A. Some packs will print the burst rating, others will print the constant discharge rating. Depends on the manufacturer.

S is the number of cells in Series. 1S is 1 cell. 2S is 2 cells in series (7.4v), 6S = 6 cells in series, etc...

2S2P pack would be 2 series, 2 parallel cells. usually you'll see this in packs with greater than 5000mah capacity. i.e. a typical 8000mah pack will be a 2S2P configuration.

The smaller set of wires with the white connector are for balacing. When you have more than 2 cells in a pack, they require balancing to keep the cells at the same voltage. You don't want the cells to drift or they can be damanged by over charge/discharge if one cell is significantly out of balance.
__________________
Carl Fisher
Team Xtreme RC
The Grove Racing Center
gndprx is offline   Reply With Quote
Old 02-19-2009, 07:17 PM   #4
Tech Fanatic
 
Join Date: Jan 2009
Location: Connecticut
Posts: 775
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by brickshouse View Post
can someone please explain what all the numbers mean about the li po batteries?? 20c 25c 30cetc? 2s 6s? charge rate 1c? and the small set of wires coming out besides the battery leads???: This is all too new for me. Could you also recommend a good semi cheap charger for a 6 cell pack of these???? Do you need a different charger for the higher voltage li po batteries?? What do ya do when there is no leads coming from the batteries??
The "C" rating is the mAh of the battery divided by 1000 multiplied by that # (20C, 30C, etc.) and is the amperage that battery can output, whether it be max or continuous.

Each "S" is a cell,with each cell being 3.7 volts, so 1S is 3.7 volts, 2S is 7.4 volts, etc.

The charge rate is the same thing as output "C"'s, except for how fast, or at what amperage you can charge it.

The small set of wires is for a balancer, I believe, which makes sure all the cells receive the same charge, and that one is not being over- or under-charged.
howtowakeakar is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
KO PROPO EX-10 Helios q's Kenshin Electric On-Road 2225 03-13-2014 02:04 AM
Serpent 960.... M7H Nitro On-Road 3281 11-14-2013 11:23 AM
Team Orion goes Li-poly. Mabuchi540 Electric On-Road 125 09-13-2006 10:20 AM
ROAR On Road Rules Discussion TimPotter Chat Lounge 126 03-21-2006 03:19 PM
Team Entity Racing 1/10th car Team Entity R/C Items: For Sale/Trade 38 04-11-2005 06:53 PM
Privateers dmatter Electric On-Road 78 03-25-2005 09:23 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 08:25 PM.


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