Your Take on these LiFePo4's

2 replies [Last post]
engr_scotty
engr_scotty's picture
Offline
Joined: 07/01/2008
Points: 68

Hi,

I saw these on ebay:

http://cgi.ebay.com/LiFePO4-12V-10Ah-SafeCell-Pack-EBike-RC-Charging_W0QQitemZ180267994406QQcmdZViewItem?hash=item180267994406&_...

I realize they are only 10AH -- which is enough for my application (barely)-- but they have the advantage of being able to be hand-assembled, are easily expanded in the future (easy to go from 36V to 48V, for example) and have a decent-C rate (15A continuous, 100A max).

Do you see any disadvantage in this approach?

Thanks,
Scotty

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
dogman
dogman's picture
Offline
Joined: 04/29/2008
Points: 830
Re: Your Take on these LiFePo4's

Just that you need to come up with your own bms. Some folks are working on it, but I haven't seen one readily avaliable that does the kind of discharge rate this battery does. You can run em without bms, but will need to really watch the discharge carefully so you don't toast cells. With lifepo4, that can be about a block of riding between ok and oops I ruined a cell or two. So to be really safe, you will need to get charged pretty frequently, but this battery is, I belive, able to really fast charge.

The other disadvantage is the cost. If you have a under 1000 watt bike, just get a Ping 20ah for a lot less money.

__________________

Be the pack leader.
36 volt sla schwinn beach cruiser
36 volt lifepo4 mongoose mtb
24 volt sla + nicad EV Global

dogman
dogman's picture
Offline
Joined: 04/29/2008
Points: 830
Re: Your Take on these LiFePo4's

Reading more thouroughly, they say they can provide a bms and charger. Cool. Funny they don't mention how much, or post em on ebay though. I think we'll all be running cells with this kind of performance someday.

__________________

Be the pack leader.
36 volt sla schwinn beach cruiser
36 volt lifepo4 mongoose mtb
24 volt sla + nicad EV Global

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
e-Moto G3 Volt Silicon Electric Scooter Commute and get around town on the G3 Volt Electric Scooter from E-Moto.
Customize This