Better news! You don't even need a used good fuse to swap. The pyro fuse element can be bought easily & cheaply. Search for PSS-1 Battery Disconnect on e-Bay or wherever works best for you 😀 Same warnings as in description apply-make sure you understand why the fuse blew in the first place!
@philkarn1761
2 ай бұрын
I'm wondering about the two conventional fuses that shunt the pyro fuse. (You removed them, and they're sitting in your round red tray of parts on the right.) My guess is that when the pyro fuse opens, the current is redirected to these two smaller fuses, which immediately blow and quench the arc. This is probably cheaper and easier than trying to quench the arc from the pyrofuse's own conductor. In mine they were each rated to break 100 kA. Fuses of this type are usually filled with a sand, probably silica (silicon dioxide) or magnesium oxide, to promote arc cooling and quenching.
@gauchejim
3 жыл бұрын
brilliant info. The two li-ion batteries, are they rechargeable? If so, any idea where it picks up gets its charge from?
@RaglansElectricBaboon
3 жыл бұрын
No, they are not. I don't know if I mentioned it in the video bit this leads to a potentially dangerous situation in 20 years or so: The pyro fuse will not function and so in an over-current situation you will not be protected. Something to worry about in 2035 if we still have a livable climate....
@RaglansElectricBaboon
3 жыл бұрын
Yes, I mention it here: kzitem.info/news/bejne/zGl40YGfcmNyZ3Y
@thebrain7693
Жыл бұрын
@@RaglansElectricBaboon bunch of ppl are getting warnings for those 2 little Li-Ion batteries on their Teslas now... seems these were pre-programmed into software for replacement after 8yrs?... Did u happen to measure the Voltage to see how good they were? Nice video btw :)
@RaglansElectricBaboon
Жыл бұрын
@@thebrain7693 makes sense that there's a warning pre programmed. I thought I measured the voltage in the video but if its not shown I don't recall it.
@philkarn1761
2 ай бұрын
Those look like lithium metal primary (non-rechargeable) batteries.
@willdashwood82
Жыл бұрын
There is a predefined lifespan of the fuse. I guess about 8 years as all of a sudden, loads of 2016 Model S cars have got the warning on the dash to replace the fuse. It's not covered by the battery warranty apparently. Just quoted £287.28 to replace it but at least it will be replaced with the newer generation that doesn't have a battery and instead draws power from the traction battery through the fuse itself.
@allaboutphones7488
2 жыл бұрын
driver side in the front or rear?????
@stuartgray5877
7 ай бұрын
I am guessing the two large purple components are ultra-capacitors to fire the explosive charge. Extra fault protection in case the system doesn't have the current to blow the fuse.
@philkarn1761
2 ай бұрын
I think they're lithium metal primary (nonrechargeable) batteries. Two in series would give roughly the voltage he sees across the pyro initiator plug when the unit detected an overcurrent. These apparently reach their shelf life after 8-9 years and require an overly expensive fuse replacement.
@stuartgray5877
2 ай бұрын
@@philkarn1761 I would like to know this as I have a 2015 Model S. Is my "Relay" going to "die" soon? I could fix it myself if that was the case.
@stuartgray5877
2 ай бұрын
@@philkarn1761 It looks like you are right based on the warning symbol on the devices. I cant quite get my phone to read the QR code from the video.
@philkarn1761
2 ай бұрын
@@stuartgray5877 I got the warning a few weeks ago on my 2015 S and just had it replaced. Annoyed I had to pay for it.
@Jeroen74
3 жыл бұрын
That protective film on the multimeter's display... how can you stand that being still on lol
@evan010101
Жыл бұрын
And Lo, my 8 year old model S has a warning on the screen that the fuse must be replaced. As the batteries go flat, the set-point reduces and it can cause a false trip. Or possibly no trip at all.
@antoinem01
3 жыл бұрын
Love this
@eduardoig17
2 жыл бұрын
Why do people leave that plastic film over the screen of their multimeter? That creates so much glare
@AS-dn8lv
3 жыл бұрын
When its blown what functions it takes aways?
@RaglansElectricBaboon
3 жыл бұрын
Max 200A from battery without this fuse. Most likely the 2x100A fuses will blow nearly immediately if you try to drive it again. However likely the pyro fuse in the main fusebox will blow too meaning the car will not allow you to try to drive.
@philkarn1761
2 ай бұрын
@@RaglansElectricBaboon if the pyro fuse triggers, the two sand fuses will immediately blow too. I think they’re there just to quench a high current arc.
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