Foreign. Let's talk about batteries today. We're gonna talk about a mystery battery. I Like these: I Like the mystery stuff, this is some kind of battery.

We don't know what it is. never seen it before. Uh, we don't know anything about. All we know is that it's supposed to be out of a truck like a semi truck.

And they came in big giant boxes, right? So there's with a bunch of these modules. So the cool thing is, they seem to be cylindrical and they have coolant A coolant Loop through them, right? So I think they probably could push quite a bit of power. They come into these little modules right here and if you count, well, one two, three, four five six and it looks like it's got another six on this side. One, two, three, four five six.

So it seems to be a 12s module. Let's take this cap off. Here we go. Okay, so there we go.

This is the top of the modules. It's got its own. BMS Inside, Look at that. a truck battery module is using BMS Uh, using Pcbs on the terminals on the terminals.

Check that out. Okay, so it's I think it's using regular bus bars. Oh I think I could probably take this off. So I think what's happening here.

it's that. it's using. uh, this just for the BMS stuff, right? And check it out. It seems to have their own little fuses.

It's a fusible Link in there connecting the board into the cell terminal. and then it's got little bus bars. But look, these, those bars are kind of small, so probably a hundred maybe two is that is that capable of carrying 200 amps? I don't think it is, but I would say probably 100 amp 12s. Let's look at the voltage here and then we can see if these are what chemistry it is.

Okay, so three point so they seem to be Lithium-ion batteries. You know it makes sense. You know to have lithium one phosphate would be too big. sometimes trucks would use that.

So the overall 3.8 right? every cell. So this one right now it's at 45. which is slightly above nominal. So I think this is a 44.4 nominal voltage right? 12s another 12s module.

It would have been great if it was a 13s or a 14s because then that would have been 48. But right now 44 and this one seems to be above Uh All Above Nominal slightly 3.8 right? So it's kind of on the chart side. now. what kind of cells are? The only thing that we have here is this: data Manufacturers is 11 6 2013 so these are all 2013 10 years old now.

Other than that, nothing. let's take this bottom part off. so check this out. Here is the cooling system.

It's a serpentine style system that goes through and touches every single cell right? So this is uh, you know, very similar to what Tesla Uh Started using in 2011 2010 with their first cars, but this one is made out of uh seems to be made out of some kind of plastic. See this. this is a kind of see-through plastic there where Tesla used aluminum or or aluminum. so still we're now able to see what kind of cells these are.

but these are cylindrical cells. um lithium ion cells. Check it out and the cover is this stuff is super nice. Look at this.

it's got like this epoxy thing here like it's like a little. it's like a seal and it's nice and soft. it's like rubbery. yeah you see it over here so that's just I think to apply pressure to the cells in there but this whole thing just Clips in.

oh my god let's clip it back on here so it'll stop leaking all this coolant all over the place. hopefully I'm gonna put it the right way. all right. So whatever you do, do not take the bottom part off because this is compress those seals on the bottom there I realize what they're for.

they're just there to put pressure and so it's really tough I had to use like clamps and I struggled with this for like 30 minutes trying to put this this bottom part together. so don't take it off, you got to see what's inside there. Um, unless you want to redo this package, repackage it in a different way I would say just don't don't do it I'd say don't do it just you know, leave it as is. let's take this thing off I Want to see? Maybe the cells say something? or maybe we can redo this board so that we can get our own, uh, our own board in here because obviously he's got a proprietary BMS right? so we won't be able to use that.

Let's take it apart. Oh all right so this is pretty cool. I was really afraid that when I was taking the screws off of here that the little bus Bars were gonna swing around and touch the other one short out and those other stuff. but the way that they work around that so that that doesn't happen is they put this like this is uh, a plastic that is double-sided uh and then it's they're just taped in there so that way they don't move around because they have to put that in there and it also has guide pins that the board over here also has this plate up here.

and also for the uh for this board has guide guy plate so that it centers in there and you can't move it around. This is pretty good engineering. It helps whoever's putting this together. Uh, not, make a mistake or make less mistakes right? So this is cool again.

12s not that useful but you know you could use it with Victron inverters right? So this could be just a 44 volt? Uh, you know, uh, little power pack or power wall or whatever. Now let's look at how much energy it's in here. So this came in big boxes and they didn't have any labels. or they had some labels that were very hard to read.

And the one thing that we could make out was that it says that each one of those boxes was 14 kilowatt hours. and uh, once we took these apart, then there was eight modules inside of that. So 14 kilowatt hours divided into eight? Or by eight? Then that's 17.50 right? So less than two kilowatts here? So these are, Oh yeah, they're not. They're kind of big for for less than two kilowatts, right? Are they? Yeah, they are kind of big.

Um, again, we're talking about 10 years ago technology, right? This is where lithium ion was 10 years ago. Uh, so that's 1750 Watt hours per module. That means, uh, if you divide that by the 12 cells that you have there, each cell is about 145.8 Watt hours. Then you divide that into the nominals voltage of the cell, which is 3.7 volts right? Then it yields about 39.5 or 39.5 So so these are probably like 40 amp hour cells when they were new.

So about one point. Yeah. one 1.7 kilowatt hour module right here. Uh, I guess I'm gonna put this together and then test it.

see where they're at now 10 years of 10 years past their their manufactured date, right? and I don't know what kind of life this battery had. Maybe maybe they put 100 000 miles on it on whatever it was on. or maybe they didn't Maybe they put 5000 miles in it and then they sat there in a warehouse somewhere and then inside the battery took the battery out and it said it's been 10 years. So I don't know where this battery's been for 10 years so let's test it.

Foreign laughs. Thank you.