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The MegaLoDongeX is a product under development that will allow you to use multiple 36v Scooter batteries to build a large back up battery system.
20cell pack - https://jag35.com/collections/lithium-batteries/products/scooter-20-cell-battery-pack'>https://jag35.com/collections/lithium-batteries/products/scooter-20-cell-battery-pack
30cell pack - https://jag35.com/collections/lithium-batteries/products/30-cell-36v-10a-scooter-battery-packs-working'>https://jag35.com/collections/lithium-batteries/products/30-cell-36v-10a-scooter-battery-packs-working

FAQ:
1) Where can learn more about batteries? http://j35.us/DIYlithiumBatteryBook
2) Where can I buy Lithium Batteries https://jag35.com/collections/lithium-batteries
4) Where Can I buy Solar Panels? https://amzn.to/3EqEywK
5) Where can I buy a Battery Management System https://s.click.aliexpress.com/e/_AAgcFQ
6) What parts do you use on your Samba? https://j35.us/eSambaParts
8) Why not use Supercapacitors?
A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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All right, welcome to my mega dongle x, update what the hell is that that's a this product right here, which is a pcb power strip to be able to connect a bunch of these es4 36 volt scooter batteries together to make a big battery right. This is um 187 watt hour batteries, right 20 cells and when you put a bunch of them together like this, then you're building, something like this like it's a four and a half uh kilowatt hour battery right. So this becomes a real sizable battery and what we're gon na do here tonight we're gon na load it at 1c um. That doesn't seem like a lot right, because 1c is basically one capacity so about four kilowatt uh load and that's what these four inverters are here for, so we're gon na connect those and then we're gon na start, putting all that energy from the batteries back into The grid, through these inverters right and so uh, then we're gon na keep an eye on this guy here to see the temperatures and see how it handles that 1c load and then, after that, we'll basically decide if this is good enough to to sell like that Or if we need to put bigger, you know: copper, traces in there or bigger cables and we'll decide that right.

But this is the test that we're going to do and we're going to show you the thermal performance of this unit when it's on continuous four kilowatt use all right. So here we are now we're doing about. Okay, this meter says 106 amps. This meter says 97.

Let me see, let me zero it out: okay, let's zero it out there we go! Maybe we'll get 95 according to that 106. According to that, i don't know which one's gon na be more accurate, but there we go uh. What are we doing here? Yeah, so 4.3 kilowatts right, 4300 watts all right so about 15 to 20 minutes after uh we started this test uh one kilowatt hour passed through the uh pcb here this power strip. The hottest thing that we can see here is those two fuses.

Those are 80 amp, fuses running about 50 amps right now, so about 80 percent of their capacity right and they're hot they're just running around 18, 87, 80 yeah, almost 90 c's 90 degrees celsius. So that is uh. I don't know i'll have to look at the data should see uh, that's normal, but it seems like this fuses run hot uh other than that. The hottest thing after that is gon na be those cables.

Those are six american wire gauge cables, uh and those are running around 60 degrees celsius. Other than that the board it's running, pretty cool, i mean, i think this is at 50, just because of those things those are creating heat but yeah. The board is probably the last thing i have to worry about. I probably could push more power than that, but because those are fused at 160 amps and because this wire here it's around 60, which, by the way that's a 200 um degree wire right.

So nothing's going to happen at 60 degrees. Here, it's uh, you know, there's nothing dangerous uh. It has way much more room to go right. But of course you don't want your wires to be running super hot all time, but this is uh a continuous max test.

So we're running 4 000 watts 100 amps through this one board. Here, if you need it more than that, if you needed six seven kilowatt or something, then i would always suggest just put more batteries. Uh or maybe you could even do less batteries, but you know, use the secondary one of these boards, so i'd say: i'm gon na be able to rate these uh this product at about a hundred amps right or about four kilowatt uh continuous uh load. After that, you can do bursts of higher, but only for a few minutes.

You know until this stuff starts getting hot, then it's got ta be going back to four kilowatts, four kilowatt continuous, all right here we go. We just completed our test. We got this batteries down to 31 volts uh. We were able to get 4.8 almost 4.5 kilowatt hours out of 26 of these, so these are still have a lot of energy more than the uh rated 187 watt hours that are in here right do the math 4.5 um.

Let me see 4.9 kilowatt hours divided by 26 and then you'll get to see which individual one. So there we go. This got hot right as we expected, but the temperatures didn't keep rising. They stayed the same as they were at uh.

You know 20 minutes into the test or whatever um yeah. The hottest parts are obviously going to be the fuses for some reason and then the secondary to these wires. Here the six gauge wires and then this connector here so they get warm. But you know all within spec uh, that's all 200 uh degree wire, and so it's fine.

These boards can also withstand about 200 degrees right before they start breaking down, but they don't get anywhere near around there. They get somewhere around 50 degrees, 60 degrees celsius, right, um and uh yeah. This is that test right there now we're gon na go back and charge this so that these uh batteries again back to on go on service here. So when the lights are blinking um red, that means that they're charging, when their blue is in their discharging.

So maybe this one for some reason stayed um, it's higher voltage than all the other ones. For some reason, that's pretty weird, but we're not charging very very much here. We're charging only uh 1.2 amps right. Let's, let's pick up that to something higher there we go now you see all those lights blinking.

So there we go. We do the about 15 amps and there we go now they're they're blinking red. Here we go, i guess, there's still some blue ones. I wonder why those oh blue and red, or something i think what happens is that these are warm because they just got completely discharged, so maybe they're gon na.

Maybe that's what they're red and blue blinking at the same time right so they're we're getting some that are blinking different things, uh, we'll let there this charge in there and then see if any of them give us problems. So there we go. The testing continues on this guy, but also another one of those things that i saw is like, maybe to put it in there. Maybe this is better where we do second tiers, like that, we put them in boxes, uh we're gon na experiment.

So if you have ideas on how to box these correctly post them in the comments, because i can use all the help that i can get here on this right uh, these were not as easy to box as some of the other uh versions of the scooter Battery so there we go. Thank you for watching this video, we'll see you guys on the next one bye you.

15 thoughts on “MeGaloDongleX PCB handled 100A for one hour – DIY Powerwall”
  1. Avataaar/Circle Created with python_avatars Alternative Space Misc. says:

    I don't know what to say! Commercial Range is from 0ºC to 70ºC ambient temperature, controled environment! no idea what's going on here, this is not a controled environment.

  2. Avataaar/Circle Created with python_avatars Grumpy John TX Redneck RC says:

    Hey Jehu, Where Did You Source That AC to DC 0-50v Variable Amps w/LED Dual Meter From? What About Any Larger Than 20 Amps Output Ones?? Thanks

  3. Avataaar/Circle Created with python_avatars Hanzel Miranda says:

    Jehu the fuses are designed to be the less resistance parts in the circuit to blow up first in case of any problem may be this is the reason why is so hot or I’m wrong? 🤔

  4. Avataaar/Circle Created with python_avatars ruhoer eoijre says:

    Jag, be carefull with them! At least es2/4 extenal packs are not running balasing thru a output! Almost ovechaged come cells over 4.5v!!! Thanks god a catch tem in time and balance them manually!

  5. Avataaar/Circle Created with python_avatars terry leacock says:

    What would a battery look like to build that has a 550 to 850 amp hr capacity pre unit? Because I work using electric forklifts and their acid batteries has that capability or capacity? So I was thinking what would the look like with lithium.

  6. Avataaar/Circle Created with python_avatars Sid Jones - Random Stuff says:

    I would put them vertically. That way you just need a stable bottom plate for them to rest on and 1 or 2 straps across to secure them. 👍

  7. Avataaar/Circle Created with python_avatars hadi anwar says:

    Hi Jehu, do you think an active balancing BMS board can help battery to survive longer? Apart from the battery BMS for charging only. Any thoughts about that?

  8. Avataaar/Circle Created with python_avatars Waylon McCann says:

    What I would do is build a rectangular box that will house the batteries. Cut high temp abs plastic tubes to house the individual cells and load them vertically in the box. Provide spacing so that you can create positive pressure airflow between the cell holders to help reduce heat build up. Either mount the power relay board under or over top of the cell box, directing the hot air flow upward and out of the power unti.

  9. Avataaar/Circle Created with python_avatars Leo Zalewski says:

    In my electric engineering career, rule of thump was if you cannot hold onto the component, things maybe too hot, time to beef up the design. Also what happens when the ambient temp is higher, maybe the magic smoke will be released?

  10. Avataaar/Circle Created with python_avatars David H says:

    You asked for additional suggestions.

    I was thinking that Rubbermaid Wire Shelving in between each layer of batteries, where the shelving can be adjusted in height away from the lower stack of batteries, would give them air to breathe & remain cool, as well as keep a degree of safety where catching on fire would not set the shelf on fire, and finally provide easy inspection points.

    I liked the idea that someone else had, about having a clear plastic box, to see the LED’s through.

    The wire shelves, surrounded by clear plexiglass, shelving attached to the rear of the box, would make a nice observable stackable unit, with a degree of protection between batteries.

  11. Avataaar/Circle Created with python_avatars JRGEngineering says:

    Full clear acrylic box on an HDPE back plate. That way you can glance in and see all the BMS indicators on the packs. Awesome Project Jehu!

  12. Avataaar/Circle Created with python_avatars John Campbell says:

    I think it be easy to change the set up to 72 volt set up that cut the amp in half. And they do make 72volt inverter. Just a thought. Hope it help you.

  13. Avataaar/Circle Created with python_avatars Jose Arrasola says:

    Look very nice 👍 awesome work sir ! My 3.5kw pack is running awesome !!!! The one I won it got here late but better then never !

  14. Avataaar/Circle Created with python_avatars CET675 says:

    I think to make the battery more versatile enough, we or you, can put the batteries in a roller kart (like the bluetti) or the other generator you evaluated a few weeks ago

  15. Avataaar/Circle Created with python_avatars CET675 says:

    In addition, to creating a space for DIY projects/mentoring among all interested.i also think you should take the DIYs behind the contain so everyone can see the amount of research you do before showing us the project. Me thinks

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