All right, it's that time to make a video about batteries. A little update on some batteries that I've shown you before. So remember these batteries. These are great.

A nine bar, 36 volts, 15 amp power. These are huge. Half a kilowatt right here, right over half a kilowatt. They come in 60 cells and they have two types of cells.

these purple ones. the M26s also the uh, gray ones which are also M26s, right? Great cells. We've been using these forever because they came in uh, nine. Baht uh, Scooter packs Forever Now for the past five years or so, right? And so there's been like billions of those.

We've sold quite a bit of them. So these packs are a pretty amazing. These are from like the second generation or third generation scooters. Uh, they're pretty good.

They're pretty compact. They're well packaged except for one problem. they don't work. Remember I made the video where I was trying to test them and they don't work.

They have a BMS right here. This is the original BMS It's a great BMS It's got double temperature sensors. It's got good mosfets. It's got a little LED here to let you know the you know, the capacity, the the the status of the thing.

It's all great except for the fact that they're software locked and because these I don't think are as abundant as the first generation I haven't found someone to that has unlocked them right. requires someone with intimate knowledge of coding and stuff. and I you know that? To me that's like Chinese so I don't know how to code I don't know So I would have to hire someone and I just thought, let's wait around and see if someone in the forums uh, takes enough interest in these, right? Well, it turns out the first generation they did, but that's the second generation. No one's done it.

and so either I have to kind of pay out of my pocket to hire someone to do it, or I find a brute force or a simpler way to doing this. and uh, that's the option that I've gone for. Of course, we could always figure out how to do this and I'm not giving up on these. There are a lot of these I Have you know, close to a thousand of these packs in my warehouse? But um, and then I'm supposed to get like another 3 000 pounds of this stuff, right? So another two, three pallets, maybe another 300 of these or something like that.

Um, so these are around they're you know they're they're so maybe yeah, someone will still find that or I'll figure out how to do it. But for now, just because they're sitting in my warehouse and they've been selling people, you guys are buying them I don't know what you guys are doing with them as of right now. Maybe you guys are just taking the BMS and changing it because that's simple to do and that is the what I've decided to do. That is the simplest thing for me, right? You take the BMS it's two screws.

you take all these connectors off. they have connectors and a few. You have to snip a few wires and then what I did is I designed a board and this board right here just uses an off-the-shelf 30 amp uh, 36 volt BMS Right And so this is the first iteration that I did and then I kept messing with it and I thought, no, we got to be able to make this easier to install. Pro Well, it's easier to make to to populate and this and stuff and then easier to install.

and then here is kind of the final one. I'm still there's one more version after this. I've been messing around. Um, it's a lot.

A lot. a little bit, uh, smaller and so it in order to put it in there, it's a lot quicker. This one you kind of fight with it a little bit. Uh.

Also, there's several things that I've done like uh, we're get, we're changing. We're trying to make these so that it doesn't take 10 minutes to build one, but it takes one minute instead, right? And so we're changing these cables. uh to one that it's already has the the things so that you don't have to like, cut them and terminate them and or put these little connectors in here. you know everything starts adding up in time and money and so so.

But also what I want to do is actually make it so that I one day I can sell this with the connectors already solder, everything that you need and anyone with a single screwdriver can take one of these packs apart and then with a single screwdriver, install it, you connect the cables and and so the re. The way I'm doing that is by installing these little Um terminals. screw terminals right so that you don't have to solder. There's a lot of people, a lot of good people out there that just want to use the battery, but they just do not want to learn to solder or get a soldering iron and do it right.

And so yeah, you could just, uh, you know, peel this back out and then put it in there. Uh, and just with a little screwdriver, tighten that screw and you're ready to go. And now you install everything back in there and then you're in business. right? Here is one that I I've already fixed.

or you know, changed the BMS And of course again, this is not the most uh, the best way to fix these, right? They already have a BMS that's likely better than this. You know, off-the-shelf third-party BMS that we can buy here. Uh, but it is locked right now and we don't know. we haven't been able to unlock it.

So until that happens, this is I think the only way right now that I can come up. so I can fix them. So we've ordered a bunch of Bms's We've ordered a bunch of boards right now. Some of my guys are taking some of these apart and we will make some of these in-house but I'm also.

you know, like all my projects, these are all going to be open source so you'll be able to buy the board already so that you can take it apart and do the thing. Or you can also just buy the bare board so that you can buy all the components yourself and then do uh, you know, uh, populated. And why would anybody want to do that? Because then that's the cheapest way, right? If every time I touch one of these things, then I'd have to add a bunch of money in a bunch of cost to it because I have to pay guys right here in California which is really expensive, labor is expensive and I want to pay my guys you know, decent wages I don't want to be running a you know, a sweat shop here and so that's why I offered the whole range you know, done ready to go right which is going to add you know, considerable more cost to this battery or but all the way from that to do you get all the parts exactly from where I get them and so I'm completely out of the loop there. and so you don't have to pay me anything right? You just order all the parts yourself and then you you do a little bit of work and then you save some money, you get these batteries at the cheapest possible way and so that's that's what we're doing here.

So today, what I'm gonna do is I'm gonna test a couple of these within the inverter so you can see how they uh, perform with the new uh, you know install BMS that we have in here. All right. So here's our setup. It's just a grid tie inverter.

It's gonna load it up with about 30 amps I think so it's gonna max out that little BMS there. Uh, we'll see how it handles. maybe it'll just blow up. Ooh okay.

26.8 00 Watts We started with uh, 20 amp hours. So that's a 15 amp hour battery. We'll see where we end right. we'll check capacity, and then we'll put the thermal camera to see how that little BMS is.

Uh, handling the load here. 26 Almost 27 amps out of 30.? Yeah, we're right there. Like you know, almost 90 percent of its capacity. All right.

So we can see how the temperature climbs in there. Let's see: 39 . uh, those two hot points ride on the uh on the battery there. those are where those cables are at.

So that's the exit points. 40c. Yeah, 26.7 amps All right. Thank you laughs.

Okay, so here's what we got. Uh, we were like within three amp hours to go I think it was eight. Yeah, so within three amp hours. So what was that? 12? Yeah, somewhere around 12 amp hours, the BMS cut off and now there's zero voltage in here.

and so this kind of cut off. Um, so we don't know if it's because one of the cell groups maybe got too low. We could check that right now, but the BMS stepped in, so that's a good thing. Um, before it got too low, there was still like around 32 volts, Which is, uh, the cell should be all be above three volts at that point, right? But we can check right now and see if that is the case.

How hot is that battery battery itself? Oh, 66. You see that those are hot cells. So 3.4 on the first group, 3.4 on the second group, 3.4 on the third group, 3.4 on the 4.46 on the fifth, three point 6, 3.45 on the seventh, three point four, five on the 8th, 3.45 on the 9th, and 3.45 on the 10th. No.

so all the cells are within spec. I Think either the BMS got too hot or the cells got too hot and the BMS decided to shut it down. but it decided to shut down. Okay, so the way this Bms's work to wake them up now, you just put power back into the charging port and then charge it up a little bit and then the BMS will function again.

So I think this BMS is a good choice here. It worked okay. should be able to put full power. You should be able to get about 27 amps continuous off of this battery.

Uh, and the mosfets will stay within uh spec because uh I looked them up and they they could go up to 150. uh, degrees? Celsius and they only got to about a hundred and seven or something like that. So yeah, I think maybe you have a little bit more room, but then you're asking for trouble if you're trying to run this continuous at Peak right? These are cheap Chinese electronics right? So if you run them I Peak you know they will fail. So yeah, I would recommend.

You know, running these at 20 amps all day I Think they'll be fine. the cells will stay cool, but BMS will stay cool enough for you to run. Uh, last forever now. Next video I'll show you how to use these.

uh for some stuff maybe like, uh, maybe a really cheap E-bike will extend it and I think you can get something like 40 miles with this battery on on a like little cheap E-bike um, and also the regular stuff like adding uh, more capacity to like popular uh devices you know, like home storage devices, power packs, and stuff. So stay tuned for that video. But for now, it looks like we found one way to fix these and it's not going to be too painful. Will be make all these available fixed already and then the parts so that you can do it yourself.

Okay, we'll see you guys on the next video. Bye All right. So here is the final Upgraded BMS This one is a third party 30 amps uh and it's got a charge and discharge Port Just like the original one and all you have to do is just connect solder two cables in here. the main positive and then the main negative right here and then connect this pin.

Uh, there's two versions of these batteries. One has two of these pins and then this one has just the one. but after that this battery's ready to go. If you check power in here, voltage in here, there's voltage and then you can charge through the regular um through the regular connector here.

Also.