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What sort of systems are used to cool batteries in the air? Liquid cooled? Air cooled?

I am interested in lithium chemistry batteries in the form of either pouch cells or 18650 batteries inside of boxes placed in the fuselage or wing.

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  • $\begingroup$ What type of batteries are you interested in? $\endgroup$ – selectstriker2 Dec 1 '17 at 18:59
  • $\begingroup$ Lithium chemistry batteries such as Li-Ion or Li-Po $\endgroup$ – Josh Fang Dec 1 '17 at 19:18
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As far as I can tell, current aviation lithium batteries do not use active cooling.

I know the True Blue Power TB17 (Robinson R44 & R66, Bell 505 Jet Ranger X) and TB44 (Cessna Caravan, DHC-6, DHC-8) do not require active cooling.

I haven't seen any easily accessible info on the Saft batteries for the A350.

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From this presentation for the A320 family:

Battery ventilation

Achieved by ambient air being drawn around the batteries and then vented directly outboard via a venturi.

So the ventilation air provides cooling as well, especially when at cruise altitude. Batteries in the avionics bay are further cooled by a separate aircon system. From the same presentation:

enter image description here

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  • $\begingroup$ Does the A320 family uses Li batteries? $\endgroup$ – mins Dec 2 '17 at 16:20
  • $\begingroup$ @mins From what I've found, the A320 family uses NiCd batteries. $\endgroup$ – selectstriker2 Dec 7 '17 at 18:29
  • $\begingroup$ @selectstriker2: I got that info too, so the post doesn't answer the question which is about "lithium chemistry batteries". $\endgroup$ – mins Dec 8 '17 at 1:11
  • $\begingroup$ @mins I can remove it if required. $\endgroup$ – Koyovis Dec 8 '17 at 1:44
  • $\begingroup$ "Ventilation" makes it sound like the primary purpose is preventing buildup of corrosive and/or flammable gaseous chemicals, not cooling? $\endgroup$ – rackandboneman Feb 1 '18 at 9:55

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