Build a 1000W Battery Spot Welder Using a Microwave Transformer | Step-by-Step Guide

Ғылым және технология

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Hey! Want to make some kind of large battery pack for a project and don't want to have to purchase one of those expensive Spot welders? Well, you're at the right place! Make a DIY Spot Welding Machine for dirt cheap - next to nothing! Just grab your tools, some scrap parts, a broken microwave oven and let's build!
This 1000-Watt Spot Welding Machine produces an open-circuit voltage as low as 2.2V at 450 Amps, when welding (in short-circuit) the voltage drops to about half of that or even less with a current as high as 900-1200A.
If you enjoyed watching this video or found it informative, please consider leaving a thumbs up, share, comment, and subscription to the channel! :)
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Circuit diagram - Spot Welding Machine: drive.google.com/file/d/1ql00...
Materials/parts needed for this project:
Microwave Oven Transformer (MOT)
Microwave Oven (AC powered) Cooling fan
15A Momentary Push switch - amzn.to/3eaq8IO
15A On/off toggle switch - amzn.to/3T4iApy
10-15A Fuse - amzn.to/3rBIsNX
1M of 4AWG Enameled copper welding wire (a.k.a battery wire) - amzn.to/3CEQhc7
Electrical wire (12-16AWG) - amzn.to/3Ma3L2F
120V 3-wire cable - amzn.to/3MecGzV
3mm exposed solid copper wire (spot welder tips) - amzn.to/3eaCnFd
UPS Inverter Metal cover/case (A plastic or wooden enlosure can do fine)
1x1" Square stick of wood
Retraction spring - amzn.to/3MecUHh
Mini door hinge - amzn.to/3ecwffv
(x2) Shortened bolts - amzn.to/3edoB4A
Zip ties - amzn.to/3EnWs5C
PVC-foam gripped handle
Wooden "Cement Float" Handle
Spray paint - amzn.to/3ynQQEC
Nickel strips for spot welding 18650-type Li-Ion batteries together - amzn.to/3RXgZBf
18650 cells - amzn.to/3QKafro
🪛🔧🔨 Tools and extra supplies I use:
➡️ Soldering Iron Kit - amzn.to/3X6L5Wq
➡️ Hot Glue Gun - amzn.to/3E6trJG
➡️ Drill Machine - amzn.to/3EDe0u8
➡️ Box cutter/Utility knife - amzn.to/3hP9MGI
➡️ X-Acto Hobby Knife - amzn.to/3XbL7ML
➡️ Cutting Matt (Green) - amzn.to/3gil71A
➡️ Needle-nose Pliers - amzn.to/3ECTKc3
➡️ Wire Cutters for Electronics - amzn.to/3ECut1B
➡️ Wire-stripping tool (Automatic) - amzn.to/3hQsMVD
➡️ Screwdriver kit - amzn.to/3V6vgNX
➡️ Heat-shrink Tube Kit - amzn.to/3AksTPE
➡️ Jumper Wire Kit - amzn.to/3UGhMZq
➡️ Breadboard for Prototyping - amzn.to/3GlF4ze
➡️ Perf Boards, Pin headers, and Connectors Kit - amzn.to/3AkySUw
➡️ Superglue - amzn.to/3EE6uis
➡️ Duct Tape - amzn.to/3g5mTU0
➡️ Double-sided Tape - amzn.to/3Edta82
➡️ Kapton Tape (for battery leads) - amzn.to/3X58bNl
Music credits:
CHRIS HAYES MUSIC - CHILL TRAP BEAT | No Copyright Trap
Free Download Link
bit.ly/36SP39M
#spotwelder #diyspotwelder #batteryspotwelder

Пікірлер: 90

  • @pet2226
    @pet2226 Жыл бұрын

    Congrats! you are super young :) and still this project is done on a "pro" DIY way. I like that the background of physics is also understood and you talk about safety issues too. Well done!

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Thank you very much!

  • @Technocrafts
    @Technocrafts2 жыл бұрын

    This was the best video! 😍 Am definitely gonna try this project 💯

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks a lot, Abhishek! Best of luck making your own one :D

  • @GrandadsOtherChannel
    @GrandadsOtherChannel2 жыл бұрын

    Very neat job, Max, I have seen many videos on the subject, but you have explained it clearly and taken the time to make it look neat and tidy. Great result 👍👍

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thank you very much for your comment and your time to watch my video! 😊✌

  • @GrandadIsAnOldMan

    @GrandadIsAnOldMan

    2 жыл бұрын

    @@MaxImagination I am so pleased that you have your comment section working properly now. You can see how many people appreciate your work 👍

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    @@GrandadIsAnOldMan Thanks, James 😃 Yeah, it's such a relief that KZread finally did something about it, and that I can finally stay in touch with the viewers again. 😊 Have a good weekend!

  • @BuildCreation
    @BuildCreation2 жыл бұрын

    Awesome Video Max! Really Nice Tutorial! It works too good!

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thank you so much, Kaustubh :))

  • @retsetman9698
    @retsetman96982 жыл бұрын

    Very useful project, actually need one of those. 👍👍

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Go for it! Thank you! :D

  • @MCsCreations
    @MCsCreations2 жыл бұрын

    Fantastic project, Max! 😃 Really well done!!! Stay safe there with your family! 🖖😊

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks a lot, MC! Glad to see you back! Likewise 😊

  • @igord.434
    @igord.4346 ай бұрын

    Cool stuff 👍

  • @RustKnight
    @RustKnight2 жыл бұрын

    Congratulations! I will try to build one myself.

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thank you and good luck with building yours'! Also stay tuned for the upcoming KZread video where this spotwelder will be used in building a battery 🔋 ☺

  • @creative_thinker
    @creative_thinker2 жыл бұрын

    wow it does a fantastic job for such batteries

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks a lot! 😄

  • @kspcreation666
    @kspcreation6662 жыл бұрын

    The spot welder is very useful and the video is well explained . I sure wanna build one spot welder btw video was very helpful and as always Amazing 🔥🔥❤

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    I'm so glad to hear that! Thanks a lot, ksp! Have a good weekend :D

  • @7MinutesCreative
    @7MinutesCreative2 жыл бұрын

    Wwoww Awesome idea Max 👍❤❤

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thank you! :)

  • @rajpatil3758
    @rajpatil37582 жыл бұрын

    Very useful project and nicely explained 👍👍🔥🔥

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thank you! Cheers!

  • @RElectroPulse
    @RElectroPulse2 жыл бұрын

    Nice video Max 🔥🔥👍

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks, Raj! :)

  • @Tillywilly969
    @Tillywilly9692 жыл бұрын

    Hi Max great video. It's so cool

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thank you, Tilly! 😊

  • @maatiraouki5183
    @maatiraouki5183 Жыл бұрын

    C’est excellent merci beaucoup pour l’exercice ❤

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Thank you!

  • @virajpatil7898
    @virajpatil78982 жыл бұрын

    Great Work ...............

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thx, Viraj!

  • @kristoffermulbjerg6848
    @kristoffermulbjerg68482 жыл бұрын

    Nice video

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks, Kristoffer!

  • @hugobose2254
    @hugobose22542 жыл бұрын

    Max As a UK electrician once told me its the AMPS (even at low voltage) that WILL kill you as much as volts, That said its a good build

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Hi, thanks for your comment. Yes I do believe that's true although those amps won't really take any negative effect on you unless there's a sizeable amount of voltage, like at around 30-50Vac is where it may start to get lethal with enough current. This is what a US electrical once said. Cheers, Max

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Plus, anyone using this machine will most likely always be safe as its chassis is linked to earth ground, creating an easier path for hot wire current to flow through rather than a person, as a person has a much higher resistance that the grounded shortcut path.

  • @vallepukumar6564
    @vallepukumar65642 жыл бұрын

    Great spot welding machine for making battery packs 😎😎

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Yes, thank you! :)

  • @Anmobgoccult20
    @Anmobgoccult209 ай бұрын

    Bravo, bravo, tnx. super abs. best video, work and product and abs. respectful from old BG.

  • @MaxImagination

    @MaxImagination

    9 ай бұрын

    Glad you enjoyed it! Thank you!

  • @yezok01
    @yezok014 ай бұрын

    Half the audio is missing

  • @arineva6862
    @arineva686210 ай бұрын

    CAUTION sorry but one big safety thing.. wires that leads to pedal has unprotected male connectors on welders side of circuit so if that connector accindentally unfastens there is exposed live wire that could be accindentally touched..

  • @MaxImagination

    @MaxImagination

    10 ай бұрын

    Thanks for pointing this out! You definitely have a point here. I'll fix that! Thanks.

  • @vdsmade
    @vdsmade Жыл бұрын

    Great idea 👷👍

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Thank you! Cheers!

  • @alishchapagai3599
    @alishchapagai35992 жыл бұрын

    Wow! It' Is Amazing 👏 😍

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thank you! 😊

  • @HanaYumusaki
    @HanaYumusaki2 жыл бұрын

    @maximagination, is there any difference if the copper tips were closer?

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Not much of a difference, as long as there's a 1mm+ gap in between. It can all depend on the width of the nickel strips you're welding. Cheers, Max

  • @ShowMaker
    @ShowMaker2 жыл бұрын

    woow super

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks! :) Feel free to watch a previous video: kzread.info/dash/bejne/nnxrs6iEg7WairQ.html

  • @rubenhayastan4854
    @rubenhayastan4854 Жыл бұрын

    Hello. I want to note that there are traces of burning the tape, which means overheating of the battery. And 1 more transformer is not enough to weld ribbons more than 0.1 mm. So, you need at least 2 transformers. To create a full-fledged apparatus, it is cheaper to buy an old transformer-type welding machine and rewind the winding.I mean, a welding machine for welding with electrodes

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Hello there, thanks for your comment. You are wrong on the first point you stated, the batteries did not overheat nor did they get hot. On your second point, you make more sense, the transmormer is in fact not powerful enough on its own to create clean and long lasting welds. This after all is a DIY project, living it up to the same standards as factory-made devices would be costly and hard to replicate.

  • @TheArachnoBot
    @TheArachnoBot Жыл бұрын

    Why not fuse the live wire?

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Good point... I forgot I left that out! Will consider adding one.

  • @rezanassiry7408
    @rezanassiry7408 Жыл бұрын

    Very good 👌

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Thank you! Cheers!

  • @dvnoytekvlog6634
    @dvnoytekvlog6634 Жыл бұрын

    Nice master 👍🙏..

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Thank you! Cheers!

  • @glasgowbusker
    @glasgowbusker2 жыл бұрын

    Hey Max, me again. Loving the circuit diagram at 7m48s - simple and detailed. At this point I realise your input is a USA 110V AC power supply. I wanted to ask your advice for doing the project for a UK 240V AC supply - my head's not in the right place for doing the maths today😄. Your transformer has 100 turns on the primary and 2 turns secondary - for a UK power supply, the input voltage is effectively doubled, what (if any) changes do I need to make to that secondary coil? Obviously I'll be using a transformer salvaged from a UK 240V microwave, so I'm assuming I can just do the same 2 turns - but I'm second guessing myself. Is this initial assumption correct?

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Hi, Michael. Thanks for your comment. The number of turns on your primary winding for a UK 240 mains power supply should be around 220 and the same 2 turns on the secondary (low voltage output). Cheers, Max

  • @joeymcclaflin5172
    @joeymcclaflin5172 Жыл бұрын

    I’m not being mean just got a good laugh about the square bar of wood again not mean I’ve heard boards called lots of things but that was a first and I promise I’m using it on job sites from now on

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    I thought that's how they're called tho 🤔 Glad I could give someone a laugh! 😂

  • @joeymcclaflin5172

    @joeymcclaflin5172

    Жыл бұрын

    @@MaxImagination I didn’t mean any hard feelings I enjoyed your video and had a chuckle please keep making the great content

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    @@joeymcclaflin5172 No worries... thanks a lot! 🙂

  • @Orgqnic-ut2sy
    @Orgqnic-ut2sy2 жыл бұрын

    Awesome

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Cheers 👍

  • @Mr.GeniusCreation
    @Mr.GeniusCreation2 жыл бұрын

    Superb bro 👏😃 Best use of old components 👍

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Yes, I guess I happened to make it 95% from recycled parts 😅 Thanks a lot, Sahil, take care!🤜🤛

  • @technicalchutta8276
    @technicalchutta82762 жыл бұрын

    Wow Superrrrrrr bro

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks!

  • @rosariovettrano4995
    @rosariovettrano4995 Жыл бұрын

    Hey you're the best *& Fast 👍 T V M vetrano from Belgium

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    Thanks for watching ✌🏻

  • @astr0yt344
    @astr0yt3442 жыл бұрын

    I wish I could build this

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    You've got this! 🙌

  • @astr0yt344

    @astr0yt344

    2 жыл бұрын

    I’m too little 😂

  • @StateofMichigan-26thState
    @StateofMichigan-26thState2 жыл бұрын

    Can you please make another remote control car video?(homemade) Like your vids :D

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Will do, one day ☺ Thanks! 👍

  • @StateofMichigan-26thState

    @StateofMichigan-26thState

    2 жыл бұрын

    @@MaxImagination Thanks, hopefully in the next video! :]

  • @citizengkar7824
    @citizengkar78242 жыл бұрын

    Nice work. The way you;re sweating, on the intro, looks like you were slaving over a hot stove ;-) Or did you just steal your mother's microwave transformer. ;-)

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Thanks for watching! Well, it was getting quite hot inside with my mom's microwave running, so I found the solution by pinching the transformer for something... better 👈😉 Cheers, Max

  • @HeLaNoR
    @HeLaNoR2 жыл бұрын

    Your welds on the fuse are cold welded. Do some checking please.

  • @MaxImagination

    @MaxImagination

    Жыл бұрын

    I think that is due to the tips being from copper. Would you recommend the right metal my fuse should be made out of or where would I get those? Thanks.

  • @TechnicalidEas07
    @TechnicalidEas072 жыл бұрын

    Waaa👏

  • @glasgowbusker
    @glasgowbusker2 жыл бұрын

    Nice video Max! Although I wanted to point out your lethal error at the beginning of the video where you point out that the transformer produces a "lethal voltage in their original state but we will be rewinding this secondary coil to produce a really low voltage .. high amount of current" What you have actually done is take a (relatively) safe high voltage transformer and produced a deadly high amp transformer! It is not the voltage that is lethal to the human body, but current (amps)! Of course, V=IR means that they are related, but if you think of electricity as a river then you get the idea pretty quickly. Imagine voltage being the flow of the water in the river and the amperage as the volume of water. You could have a very fast high voltage stream that poses little threat to an adult, whilst a virtually static but a deep slow moving, even static river that could drown you.

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    Hi Michael. Thanks for your consideration. However, I hate to break it to you, but you must've understood it back to front... Any high voltage especially in the thousands of volts with the tiniest bit of current in the tens of miliamps range is enough to kill a person. With high current flow and almost no Electric pressure (volts) such a 2V, it won't even hurt an insect! Think of voltage as electric potential, if there's little to no potential (using height metaphorically in this example) a heavy human who jumps off of a 2ft ledge won't hurt themselves as much as if they were to jump off a lethal 200ft cliff even weighing less. Think about that. Voltage and current work in respect to each other making amplitude in voltage the main characteristic for electric shock, and current being the amplifier of that shock. I hope this makes sense. - Max

  • @MaxImagination

    @MaxImagination

    2 жыл бұрын

    By the way, looking at my demonstration, I was actually grounded while touching the pins, and didn't get a tingle let alone a jolt from the device.

  • @glasgowbusker

    @glasgowbusker

    2 жыл бұрын

    Final thought - a typical police taser weapon for incapacitating suspects, is 50,000 volts. But the current is extremely low. Food for thought. Sorry to bang my little drum so loudly - it's my autism at work, honest! - but safety is important (can't fault you on your safety, btw, but the viewers may not be so considerate of theirs).

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