LiFePO4 Batteries

Battery installed with 5ah FUSE on battery. Working fine. Since the BMS units can fail... and have failed on the Tenergy, it's best to fuse it on the battery.

Right now I'm testing this Tenergy LiFePo4 12.8v10ah unit on my CBA III load device. Set up to discharge at 0.8 amp. Will report tonight on how it does with a graph.

Walt Rogers WX

On Saturday, June 14, 2014 1:15:51 PM UTC-7, WaltWX wrote:
Just bought a Tenergy LiFePO4 12.8V 10ah + Charger from all-battery.com



It has the Battery Management System (BMS) with short circuit, over charge and under discharge protection.



QUESTION: Any recommendations from other glider pilots on whether I should ALSO add a fuse on the battery before installing the connector for my ship?

On Thursday, June 19, 2014 11:38:30 AM UTC-4, WaltWX wrote:
... Since the BMS units can fail... and have failed on the Tenergy, ...

Does the BMS for LiPO4 batteries do anything during discharge in flight?

Does a BMS failure during flight have any bad consequences (other than loss of electrical power)?

Here's the CBA III battery test graphic on the Tenergy LiFePO4 12.8V10ah. It rated at 9.71ah and ran for 11hours on 0.8amp draw from 13.1V to 12.7V. Dropped off in the last hour to 11.5V bringing it to 12 hours of useful life.. I arbitrarily set the cut off at 11.5V in my test:

https://dl.dropbox.com/s/xc4e0furdwn...Tenergy_L1.jpg

Walt Rogers WX