I am trying to restore my 3.2v LiFePO4 260ah prismatic winston cells and I was told 3.2v at .1c charge rate should be ok, but i'm wondering if even less current would work.Are there any chance that enough could be recovered to make a usable pack? Sinopoly 200ah cells
Unfortunately there's lots of testing and research out there that says otherwise.wow thanks for all the replies despite the foreboding results I might expect. Thanks a lot guys! (no really I appreciate it!)
The battery was made with 0v wasnt it? How does a slow discharge to 0v damage it so irreversibly? Doesnt make sense and adds credence to my theory that most people are charging them wrong from 0v.
They likely tested these batteries with devices to quickly drain the current to 0v. this is a slow discharge to 0v, so I still have hope.Unfortunately there's lots of testing and research out there that says otherwise.
One (of many):
"The over-discharge has a huge impact on the utilizable capacity and cycle life of the batteries. In particular, overdischarge may completely damage the battery when the battery voltage drops to 0 V, but the battery does not
ignite, explode or smoke. "
An over-discharge experiment with the 200 Ah
LiFePO4 power battery pack was performed by a threephase asynchronous motor load on the experimental
platform. Batteries #10 through #13 were damaged (the
battery terminal voltage was 0 V), the terminal voltage of
batteries #14 and #15 was approximately 2.71 V, and the
other battery voltages were between 3.08 V to 3.26 V. All
battery voltages are shown in Table 2.
An over-discharge experiment..... [performed] with threephase asynchronous motor load...