Nubo wrote:Sounds to me like a metal panel "beer-canning" due to pressure change. As I think I previously noted, I'm not sure if there is any provision in the battery case for pressure equalization, or if the case is simply meant to expand and contract. If the former, then perhaps a valve/vent/filter is blocked. If the latter then could just be an accident of geometry or stamping. Or I could speculate that pack attachment bolts (or something bolted TO the pack) need to be re-torqued. I might consider it a minor annoyance but given the electrical smell I'd say have Nissan look into it.
Due to a broken charger in the town I work in (someone backed into the pillar and knocked it over!), I ended up having to drive up to the mountain town of Rossland this afternoon to charge. I got the clunk just before getting into town. I flipped to the battery cell screen of Leaf Spy and nothing odd showed up there; temps all normal, cell voltages too. I parked the car, plugged in and sat in it for 5 minutes, and it clunked again as I was sitting there. I also did not get any 'electrical' smell... so now I'm not sure what to think. Perhaps it is just the battery shell "beer-canning" as you've suggested.
Perhaps it is meant to be vented, but mine is blocked? I have driven on a number of gravel and muddy roads, so possible I've flung up some debris into a vent. I'll put it on the list of things for my dealer to look at when I make the 380 km trek over the mountains in May! (I also need to get the brakes reprogrammed according to a letter from Nissan.)
2014 SL, 166,000km as of Sep 2018, 80% SOH
1 bar lost Aug 31/17 @ 54.5Ahr 83%SOH 79.72%Hx 127,413km
Commuting 142km round-trip; level 2 at home, level 1 at work