Thumping sound from floor (battery?) when supercharging

[ratsbew]

While supercharging I noticed several (2-4 times) thuds under the car that could be lightly felt in my feet. I was thinking that maybe it was thermal expansion in the sheet metal under the car or in the pack.

Has anyone else noticed this or have an explanation?

 

[augkuo]

Yup I noticed that too - thermal expansuon?

 

[EV Enthusiast]

I've had it happen twice with my 3 sessions of super charging. Car is less than a week old.

 

[MidwestM3P]

I just experienced this also, a couple of thunks while supercharging. Car only a couple weeks old. 37 degrees out right now.

 

[ACA Man]

Yup I noticed that too - thermal expansuon?

I believe so.

 

[Silver_Bullet]

I experienced the same thumping sound while supercharging...

 

[rollo.martins]

This is probably the same issue as discussed here: Banging/clunking sound when driving over mountains in cold weather

 

[surfrasch]

I'm pretty sure my car didn't do this originally since I've had it a month, started noticing it with 48.12.1.

 

[Adrien]

Temperature difference from a warming/cooling battery pack. The aluminum sheetmetal around the pack expands/shrinks more than it's steel around it therefore a sometimes concerning thump can be heard. If you've ever moved the concave of a thin sheet of metal from one side to the other....same sound. Many MANY people have reported this and it's nothing to be concerned about once understood. It's rightfully concerning though.

 

[whippitbadger]

As others have said, yeah it is just the sheet metal expanding. I've experienced it driving a few times, but not as dramatic as it is when supercharging.

It's super annoying, but nothing to be concerned about.