Official Charging Recommendations

[Scorpio3d]

Thank you all I have read tons of stuff on this forum and elsewhere so I am well aware of most all of that. My understanding was that MikeyAO was doing some deep dive battery testing, so I was just curious what he had come up with more than anything.

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[MickeyAO]

Thank you all I have read tons of stuff on this forum and elsewhere so I am well aware of most all of that. My understanding was that MikeyAO was doing some deep dive battery testing, so I was just curious what he had come up with more than anything.

We are doing our standard consortium testing on actual cells from a Lightning (SKE805A). We harvested the cells from a module (so all of you who still think that an individual cell can be replaced are very wrong)

Characterization testing is complete (and I made a comment in a couple of threads about resistance under a specific SOC and the lower thermal stability point of the cell), and calendar life is on going. Printed out the graphs for capacity fade and I would highly recommend to NOT store your vehicle at 80% actual SOC above 55C (the degradation after 8 weeks is amazing).

The thermal stability point made us change our normal testing in that we will test at 25C, 45C, and 10C, with the normal 55C being a no go on cycling.

 

[Scorpio3d]

Thank you!! that is very interesting!(Even if I don’t understand all of it) 55 C is like 131 F! I saw you were in San Antonio I am in the Dallas area. Hopefully we don’t get to 55C or 131F although I wouldn’t bet against it

 

[invertedspear]

I would highly recommend to NOT store your vehicle at 80% actual SOC above 55C

Unplugged, I could see that being a problem here, but plugged in it should actively cool the pack. Regardless, knowing this now, I'll be reducing my upper limit to 75% unless going somewhere. Thank you for the info

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