Model S Plaid : 137F battery temperature after supercharging ????

[Nabush]

Hi guys,

First time leaving on a long trip with the Plaid.
I have Scan My Tesla on my phone.
I notice the car is running the battery hot all the time in summer while normal driving (no active cooling before 104F and maintains this temperature, sport mode or Plaid mode does not change anything).
While supercharging I could see with horror that the battery was maintaining 137F !!! (58C)

Can other Plaid user tell me if this is normal, a scanmytesla bug reporting battery temperatures ?

This kind of temperatures on Li-Ion batteries would be extremely bad...

Waiting on feedback from you guys....

Thanks

 

[Nabush]

Precision. 95F outside temp and long charging sessions (20% to 90%)

 

[brainhouston]

on my 2016 p100d it reached 54C while supercharging after long drive on hot day
ac was screaming loud but couldn't cool it down till later when charge rate dropped

 

[ucmndd]

This kind of temperatures on Li-Ion batteries would be extremely bad...

Everything is a trade-off.

Prolonged storage or operation at high temperatures is bad from a degradation perspective. On the contrary, DC fast charging is overall better for the cells at a toasty warm temperature to minimize lithium plating so the BMS allows (and even encourages) much higher pack temperatures temporarily.

Continuous active cooling results in an efficiency hit and as we all know, range is king and the #1 concern for most EV buyers.

What is the overall best compromise in your opinion? The batteries would probably prefer that we always keep them at a comfortable 65 Fahrenheit and of course only charge and discharge them very slowly - but that would make for a pretty crappy EV.

 

[karkrazy]

Try supercharging on a cold day when the battery isn’t adequately pre-conditioned; you’re going to hear loud thunks and banging from thermal expansion and it’s normal.

Can’t say if 137 deg is too high or too low, but yes, it does run hot.

 

[Nabush]

I checked Bjorn Nyland vids on YT during his 1000km challenge with the Plaid and battery was at 56.5C with 1C outside temp (winter) on 10-50% charges, so it looks like this is normal for a Plaid...
Super hot but I guess okay for Supercharging... I only supercharge a handfull of times each year so not so concerning I guess....