Best practices for extending the LIFE of the battery?

[MickeyAO]

Long time, no see!!

On here daily, but rarely respond to posts.

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[NW Ontario Ford Lightning]

Top voltage for our packs is around 4.09, not 4.06. You con monitor this through the obd connector.

I would like to know for sure the top voltage of a 100% charged Lightning pack.
I have seen 390 v (which is 4.06v per cell)
if the actual top voltage per cell is 4.09 then 100% is then 392.6v

To reply to post #12 and #13, the actual Vmax for the cells is 4.15 V, plus/minus 0.05 V

If this is right, then the top voltage of the pack is between 393.6v and 403.2v

I have a scanner - I will do my own check, and report back.

The point of my post was to show that "100% charge" as the truck reports it, is quite a bit lower than the full range of the cell voltage curve, and to bring attention to the impact of heat if the truck is parked for long periods at high SOC as this risk seems less well-known.

 

[Firn]

I would like to know for sure the top voltage of a 100% charged Lightning pack.
I have seen 390 v (which is 4.06v per cell)
if the actual top voltage per cell is 4.09 then 100% is then 392.6v


If this is right, then the top voltage of the pack is between 393.6v and 403.2v

I have a scanner - I will do my own check, and report back.

The point of my post was to show that "100% charge" as the truck reports it, is quite a bit lower than the full range of the cell voltage curve, and to bring attention to the impact of heat if the truck is parked for long periods at high SOC as this risk seems less well-known.

Mikey is talking about maximum for the battery technology, 4.15v plus or minus .05 is otherwise considered the maximum safe voltage for NMC chemistry. As he says though the BMS won't charge that high and that isn't our "100%".

If you need to verify yourself then grab your scanner, but I have, and reported cell voltage is 4.08-4.09 at 100% charge.

100% charge is lower than it could be, although I think we might disagree on the "quite a bit" however. And degradation at 4.09, although much better than it would be at 4.15, is still going to be there.

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