EV accidents

[RonD]

There was a blonde in a white bikini, thats about the only thing in it as far as experiencing

 

[rusty ol ranger]

So... this is real.

This was a song funded by the Saskatchewan tourism board to encourage people to visit Regina.


Just.... give it a listen.

Thats more ridiculious then this...

 

[sgtsandman]

Thats more ridiculious then this...

Swift is where it's at!

 

[ZMan]

Where are you getting those numbers? Outside of the 150k/8 year warranty, I'm seeing references to Tesla's internal tracking showing a mean of 90% battery life at 200k miles (https://www.motortrend.com/features/how-long-does-a-tesla-battery-last/) and a JD Power reference to 10-20 years (https://www.motortrend.com/features/how-long-does-a-tesla-battery-last/).

Agreed regarding the structural component question - I'm not sure what the current outlook is on replacing the cells when they're installed that way. Doesn't @ZMan do a lot of repair work? I wonder if he's done any training on that situation.

I don't have any training on EVs. I didn't read the entire thead for context, but I do believe Tesla batteries are structural, but they are bolted in. I don't know anything about replacing cells on a Tesla, but my buddy, who is a mechanic, has done a few prius cell replacements, it's actually fairly cheap to do. Also, I am no longer i the collision repair field. I left the big shop I worked for at the beginning of the pandemic, long story short I do custom interiors/upholstery full time now.

 

[sgtsandman]

I have read that individual cells can be changed in at least some battery packs. That might be the better way to go if it can be done. I don’t know if it would be easier but it would be less expensive.

 

[PetroleumJunkie412]

I have read that individual cells can be changed in at least some battery packs. That might be the better way to go if it can be done. I don’t know if it would be easier but it would be less expensive.

Anything 18650 based or similar, this is true. Things like DeWalt batteries when they go bad typically only lose one or two cells. Pretty easy to fix with a voltmeter and Battery spot welder. They can be sourced fairly cheap on ebay, certainly cheaper than replacing three or four batteries

I know the old Tesla batteries were basically a super stack of 18650s. I don't know if they're still that way. I doubt it.

 

[fastpakr]

Anything 18650 based or similar, this is true. Things like DeWalt batteries when they go bad typically only lose one or two cells. Pretty easy to fix with a voltmeter and Battery spot welder. They can be sourced fairly cheap on ebay, certainly cheaper than replacing three or four batteries

I know the old Tesla batteries were basically a super stack of 18650s. I don't know if they're still that way. I doubt it.

I think they switched to a larger cell in the last year or two. Same concept, just based on bigger individual cells.

 

[PetroleumJunkie412]

I think they switched to a larger cell in the last year or two. Same concept, just based on bigger individual cells.

If you ever want to laugh, open up a modern 9-volt. It's basically a stack of 123s inside of a metal case. Funny enough, if you want to supercharge anything that runs on double a's, rip a 9 volt open and Hotwire it's battery stack into whatever you intend to overvolt

 

[fastpakr]

If you ever want to laugh, open up a modern 9-volt. It's basically a stack of 123s inside of a metal case. Funny enough, if you want to supercharge anything that runs on double a's, rip a 9 volt open and Hotwire it's battery stack into whatever you intend to overvolt

On another forum I use, 9 volts are a topic of discussion. There's a whole history of which brands are preferable for certain uses as they have evolved over time - lots of different types of construction. It's a model rocketry group so how they handle high acceleration is a big deal. People keep switching brands depending on how each is built.

 

[fastpakr]

I had to go back and check - looks like Tesla migrated from 18650 to 2170 (similar but slightly bigger) and more recently to the 4680 to reduce the total number of cells per pack. Evidently there are less resistance and heat issues with the 4680.

 

[19Walt93]

I have read that individual cells can be changed in at least some battery packs. That might be the better way to go if it can be done. I don’t know if it would be easier but it would be less expensive.

One of my old techs was working on an electric F150 last month when I was in. He said the battery cost $38,000, and was composed of ten cells at $7000 each. The battery runs from the back of the front wheel opening to the front of the rear wheel opening on that crew cab truck so it's no small job to remove. He said the cells needed to be programmed so they'd all be equal after replacement.

 

[PetroleumJunkie412]

I had to go back and check - looks like Tesla migrated from 18650 to 2170 (similar but slightly bigger) and more recently to the 4680 to reduce the total number of cells per pack. Evidently there are less resistance and heat issues with the 4680.
View attachment 92641

It makes sense.

Still makes me laugh that they're essentially using glorified e cig batteries to power the things lol

 

[sgtsandman]

One of my old techs was working on an electric F150 last month when I was in. He said the battery cost $38,000, and was composed of ten cells at $7000 each. The battery runs from the back of the front wheel opening to the front of the rear wheel opening on that crew cab truck so it's no small job to remove. He said the cells needed to be programmed so they'd all be equal after replacement.

$7,000 is better than $38,000, though not a small amount of money.

I’ve heard of the need to cycle the battery pack in order to get all the cells equalized. I think I’ve heard of it on smaller batteries as well. I wonder if he means that rather than programming? I have heard of cell equalization being a big deal. Things can go bad if it isn’t addressed but all that is above my head being the average wrench monkey.

 

[sgtsandman]

If you ever want to laugh, open up a modern 9-volt. It's basically a stack of 123s inside of a metal case. Funny enough, if you want to supercharge anything that runs on double a's, rip a 9 volt open and Hotwire it's battery stack into whatever you intend to overvolt

Actually, more like slightly under sized AAA batteries. Six of them. 123s are shorter and much fatter.

 

[fastpakr]

It makes sense.

Still makes me laugh that they're essentially using glorified e cig batteries to power the things lol

They're certainly sourced with stricter controls than the e-cig and hoverboard level of manufacturing, but yeah - same basic building blocks. Same deal with the Razor motorcycle my son has - all sorts of individuals and small companies offering custom battery packs for them, but they're pretty much all assembled using 18650's. The issue is just getting a matching set of high quality cells and using a good BMS, spot welder, etc.