Kjøle batteriet med kupeluft

[Trekkoppbil]

Av og til kan det være vanskelig å finne en kjølig kjeller å parkere i.

Dersom man må lade batteriet i sommervarmen, så er trikset å la AC stå på med ny luft:
http://www.mynissanleaf.com/viewtopic.php?f=38&t=22276

Det snakkes normalt ikke om at Leafen har aktiv kjøling, siden batteriet mangler kjøleveske. Men når man står stille, er det visse muligheter for halvaktiv luftkjøling.

[Electrix]

Dersom batteriet er varmt er vel trikset å IKKE la AC stå på mens bilen står stille da det varmer opp batteriet. Bare les det du linker til. 
Å la vifta kjøre på fullt uten AC kan derimot hjelpe noe.

[Trekkoppbil]

Nå leste jeg en gang til, og alle kommentarer ser ut til å støtte denne teorien om at lufta fra kabinen går ned mot batteriet:

The radiator fans are running. Hot air is blowing out over the front tires.
The cabin blower is running. it is sucking air in at the bottom of the windshield.
The cool air exhausting from the cabin appears to be coming out around the battery shield.

Om vinteren burde da varm luft fra kabinen varme batteriet, og om sommeren burde kald luft fra kabinen kjøle batteriet. Det har nok begrensa effekt, men i visse situasjoner kan det nok hjelpe noe. Dersom man kjører lufta på resirkulering, vil man sjølvsagt ikke få denne effekten.

[Electrix]

I tillegg ser du på side 2 at han har kjørt en test med logging.

I just did some testing and it appears that the waste heat from the AC might actually work against this.
I started a L2 Charge at 15% SOC.
I put the Leaf in standby mode so I could activate the AC, set the Climate Control 72F at full fan power and vent outside air through both top and bottom vents. The outside ambient temperature at this time was 92F. I used LeafSpy to monitor the Leaf from my Office next to it and it was using 1,500 watts the entire time for the AC. I then recorded the T1 through T3 temperatures every 5 minutes with LeafSpy.

11:50AM
93.6 92.4 92.2

11:55AM
94.0 92.8 92.4

12:00PM
94.2 93.2 92.6

12:05PM
94.2 93.6 92.6

12:10PM
94.4 94.0 92.8

12:15PM
94.4 94.4 93.0

12:20PM
94.6 94.8 93.2

12:25PM
94.6 95.2 93.4

12:30PM
94.8 95.8 93.6

12:35PM
95.0 96.2 93.8

12:40PM
95.2 96.4 94.0

12:45PM
95.2 96.8 94.2

12:50PM
95.4 97.0 94.4

As you can see, there was a steady temperature climb for the whole hour. I then shut-down the AC in the Leaf and let it continue charging as it had reached 45% SOC by now. I then recorded the temperatures from this point via LeafSpy.

12:55PM
95.4 97.0 94.4

1:00PM
95.0 96.4 94.4

1:05PM
95.0 96.2 94.4

1:10PM
95.0 96.2 94.2

1:15PM
94.8 96.0 94.0

1:20PM
94.6 95.8 94.0

As you can see, the temperature started to decrease. I finally stopped after 1:20PM because I could already see the pattern. The ambient air temperature was actually up to 94F when I finished.

The AC was actually making the temperature rise and I suspect it is because the Leaf is designed to allow air flow from the front of the vehicle to out the back around the battery pack. With the AC running, the waste heat was being sent around the battery pack. The inside of the Leaf was nice and cold after I ended the AC test and it was using 1,500 watts the entire hour so I know it was doing max cooling allowed the entire time.

So I think any benefit from having the vent AC to cool the battery pack is defeated by the waste Heat produced by the AC since this air also flows around the battery pack.