Mach1E
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Given all my experience is from ICE, but when talking coolant temps, even with an ICE pumping out insane heat (way more than a BEV), coolant won’t spike in 5 seconds.I wouldn't make any final conclusions until data is available....
5 seconds at high current is plenty of time to trigger internal cell temp sensor. With decent heat transfer, even a second or two more under full power would make a big difference in 1/4 mile.
I think we'd need to see current versus temp over time to tell one way or the other whether current is cut based on cell temp or on a timer.
exterior air temp is not going to change cooling much, so that's not a good test. reducing coolant inlet temp from 58 deg F to 35-40 deg F entering the battery chill plate by running it thru an ice water bath would extract way more heat, and fast enough to make a difference in cell core temp during a drag run is what I'd bet.
considering how cheap this mod would be to test, it seems worth a try rather than a guess.
Now you mentioned an internal cell temp sensor, that’s a different story. But I still don’t see coolant being able to transfer any significant heat in a matter of seconds.
It is admittedly all theory at this point without data. But because Ford actually quoted the “5 seconds” multiple times, it seems like it’s a hard limit that can’t be bypassed without a software change.
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