Climate Control usage effect on battery cooling..

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FloridaSun

FloridaSun

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I did a little test this evening.. I was driving home from Orlando and I stopped at a 50kw charger to get a little FREE charge and to check battery cooling and how AC or FAN use while charging affect battery cooling.
So, no matter if you just turn on the fan or fan and AC, it WILL reduce your battery cooling. Temperatures in Fahrenheit..
cooling.webp
 
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As I mentioned on FB and what you have proven, is that there is a limited refrigerant-based cooling resource and sharing has its downside. On your data, no-doubt the thermal transfer due to the temp diff between ~100F to ~73F is not enough different from ~100F to ~69F to make a difference to the charge rate, based on the linear SoC increase.
Not only is there moderate thermal mass involved with the battery but the cooling tubes seem to be some thermal 'distance' from the actual cells. This is where Tesla seems to have an edge, with cylindrical cells surrounded closely by cooling channels.
 
KiwiME said:
As I mentioned on FB and what you have proven, is that there is a limited refrigerant-based cooling resource and sharing has its downside. On your data, no-doubt the thermal transfer due to the temp diff between ~100F to ~73F is not enough different from ~100F to ~69F to make a difference to the charge rate, based on the linear SoC increase.
Not only is there moderate thermal mass involved with the battery but the cooling tubes seem to be some thermal 'distance' from the actual cells. This is where Tesla seems to have an edge, with cylindrical cells surrounded closely by cooling channels.
Click to expand...
Actually, I did previous tests, checking battery inlet temperature when charging and if I don't have AC or fan on, the inlet temperature drops to 64 F - 66 F, 17C to 18C and stays there to the end of the session. When AC or fan were on, it seems that the system was unable to get below 21 C. So, there is a 3C+ difference in cooling efficiency with the climate control running.. I want to get a very long life out of my battery, so I will avoid having the car on at all while charging.
 
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