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What could happen if the car is jack stand supported on the battery pack?

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Does the OP mean that the car has been sitting on jack stands under each of the proper jacking points, or jack stands further along the underside of the car? If the jack stands were under the jack points, and using something to ensure the contact point was only the jack points, then surely that would all be okay? The problem would be in jacking the car back up to switch out the last jack stand on the way up, and the first jack stand on the way down...
 
Does the OP mean that the car has been sitting on jack stands under each of the proper jacking points, or jack stands further along the underside of the car? If the jack stands were under the jack points, and using something to ensure the contact point was only the jack points, then surely that would all be okay? The problem would be in jacking the car back up to switch out the last jack stand on the way up, and the first jack stand on the way down...

He specifically says the car is sitting on jack stands but that the jack stands are on the battery pack. It does sound like he may have thought this was the only way to get the car up, putting the jack on jack point and then placing the jack stand somewhere else. You would usually jack up the car from another spot (not the battery pack!) on the car so you have the jack point available to place the jack stand there. But Tesla's are a bit different than a standard ICE car. So if you need to keep the jack point free to place a jack stand, there are several threads that discuss this including this one here:

Inexpensive method to put the Model 3 on 4 Jack Stands
 
Who in the world put a Model 3 on jackstands - supported by the battery....for an extended period of time?

Better question....why?

The OP said "stands" That's plural.

hmmm...what in the world happened?

I'm thinking he jacked the car up using a floor jack using the jack point, and didn't know how to put the jack stand in the same spot to jack up the other side, so he placed it somewhere on the battery. Definitely not something you want to do...
 
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Oldschool496

Member
Sep 27, 2017
707
416
Florida
Isn’t there a titanium plate covering the battery pack?

Titanium plate(For sure in a Model S, others not so sure) is in the very front where impact from things in the road might make initial contact with the first part of the battery if your moving forward. The rest of the battery is housed in aluminum I think. At no point should you use the battery as a point for jacking and worse yet rest it on anything.
 

ZOMGVTEK

Member
May 19, 2015
559
442
'Merica
Jacking the car up by the battery can potentially crush cells inside the pack, causing thermal runaway and a fire that’s quite challenging to stop. This isn’t likely on the 3, but it’s very much possible. It’s a heavy car, making the whole battery tolerate the extreme point loading you can get jacking it up by the pack is very impractical. It is likely to damage the pack and presumably would require total replacement out of caution, so you definitely want to avoid it.

I believe S was the only model to have a ‘titanium’ plate. But this is very much a hack to help smooth over a problem, and it was in front of the battery to try and reduce the likelihood of punctures and fires after a few incidents on road. There’s nothing that special about titanium that makes it terribly well suited for this task, I suspect it was done to sound cooler to help smooth over the fire concerns. The cost is so outrageously high for titanium compared to something like 7075 aluminum for a trivial gain in specific strength, it’s foolish to use it in an application like this on a clean sheet design.
 

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