|
Home | Forum | Online Store | Information | LJ Webcam | Gallery | Register | FAQ | Community | Calendar | Today's Posts | Search |
|
Thread Tools | Display Modes |
|
05-07-2013, 03:49 PM | #1 |
Senior Member
Join Date: Mar 2009
Posts: 2,384
|
Am I wrong, or is there something more to these cells than just placing the right combination of them in series and parallel in order to get your required voltage and Ahs? All the cells seem to have a different discharge rate. At our usage, does that even matter?
|
05-07-2013, 03:59 PM | #2 | |
Senior Member
Join Date: Apr 2011
Location: Riverside CA
Posts: 673
|
Quote:
From what I see others have posted a bait tank uses 0.25ah at 6v but if you use 2 cells like this http://www.batteryspace.com/LiFePO4-...3.4-screw.aspx These are capable of 160ah discharge continuously so that bait tank pump pulling 0.25ah is nothing compared to what it can supply. Most high end brand LiFePo4 battery's are around 10C rating so they will supply more than enough current to run out stuff. And that is why my 100ah LifePo4 battery is so use full, I have used it to jump start cars twice since it has 1000ah discharge rate, I just need to make a waterproof case so when I finally put it on the yak I don't risk shocking myself with all that current... Last edited by danjor; 05-07-2013 at 04:10 PM. |
|
05-10-2013, 06:23 AM | #3 | |
Senior Member
Join Date: Jun 2008
Posts: 552
|
Quote:
Greg, your right. LION batteries produce heat as they discharge. The faster the discharge rate, the greater the heat produced (enough to melt right through a plastic kayak (recall the airline issues not that long ago). However, for the most part, placing small batteries in series/parallel hasn't up-ed the discharge rate to a point that would create a problem. |
|
05-10-2013, 04:32 PM | #4 | |
Senior Member
Join Date: Mar 2009
Posts: 2,384
|
Quote:
|
|
05-10-2013, 06:43 PM | #5 | |
Large Member
Join Date: Jul 2012
Location: La Verne, CA
Posts: 1,002
|
Quote:
Pack designers on the other hand adjust the current capability by adjusting the number of cells in parallel. Energy density in this instance stays constant and capacity increases. Heat, fast charge/discharge, and the state you leave your battery at have the most impact on cycle life and irreversible capacity loss. Most battery manufactures ship batteries between 25-50 percent state of charge to maximize battery life and safety. |
|
05-10-2013, 05:09 PM | #6 |
Team Keine Zugehörigkeit
Join Date: Nov 2010
Location: Way out there
Posts: 2,854
|
bad example, heat was not the issue for the airline, the issue was the gases emitted by the batteries not being able to be vented properly as the box containing them was too small. which caused a small less then 1 inch blue flame to be produced.
__________________
Não alimente os trolls------------Don't feed the trolls---------------インタネット荒らしを無視しろ |
|
|