Route AC over battery

[DougWantsALeaf]

How does the ENV-200 route the AC into the battery? Is just over the cover, or does it actually pump it "through" the battery package?

[goldbrick]

Per InsideEv's it's neither. There is a HVAC refrigerant line that enters/exits the battery pack enclosure and it's supposedly mainly used to cool the electronics inside.

"The fan, as well as a tiny radiator, which is plumbed into the vehicle's HVAC system, reside in the front-most section of the battery pack. It does not direct air at the cells/pouches, but rather towards the various electronics/controllers within the pack."

https://insideevs.com/news/322347/heres ... tery-pack/

[goldbrick]

On second thought.....it the HVAC unit inside the pack is truly a radiator rather than an evaporator/condenser then maybe it's simpler than I thought. I don't know what they would circulate through it though since there really isn't any liquid available to the HVAC system beside the refrigerant as far as I know and even for Nissan, routing air through the radiator seems like a dumb idea. Finally, even the fan isn't directed at the battery cells, it is a fairly small enclosed space and I would think any active thermal control would help moderate the cell temperatures as well as any associated electronics.

[DougWantsALeaf]

I wonder if mux knows given his work on the Leaf batteries?

[LeftieBiker]

From what I understand, the cooling system in question may have done what it was designed to do - cool the battery's internal electronics - but it failed at protecting the battery from heat-related degradation. Hyundai supposedly used cold air blown into the pack, and that didn't work especially well either at keeping the cells cool.

[Oilpan4]

Sounds like some one just needs to cut some holes in a leaf battery, run some A/C to it and find out.

[cwerdna]

Sounds like some one just needs to cut some holes in a leaf battery, run some A/C to it and find out.

Probably not a good idea. Leaf packs are sealed, for a reason.

[gncndad]

Sounds like some one just needs to cut some holes in a leaf battery, run some A/C to it and find out.

GREAT IDEA! Get 'er done and report back!

[DougWantsALeaf]

Just watch out for puddles.

[jlv]

Sounds like some one just needs to cut some holes in a leaf battery, run some A/C to it and find out.

Too bad all those really smart engineers at Nissan didn't see this obvious solution.