Build a 1000W Battery Spot Welder Using a Microwave Transformer | Step-by-Step Guide
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- čas přidán 3. 06. 2024
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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 - Věda a technologie
![Eminem - Houdini [Official Music Video]](http://i.ytimg.com/vi/22tVWwmTie8/mqdefault.jpg)
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!
Thank you very much!
Bravo, bravo, tnx. super abs. best video, work and product and abs. respectful from old BG.
Glad you enjoyed it! Thank you!
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 👍👍
Thank you very much for your comment and your time to watch my video!
😊✌
@@MaxImagination I am so pleased that you have your comment section working properly now. You can see how many people appreciate your work 👍
@@GrandadIsAnOldMan Thanks, James 😃
Yeah, it's such a relief that CZcams finally did something about it, and that I can finally stay in touch with the viewers again. 😊
Have a good weekend!
Fantastic project, Max! 😃
Really well done!!!
Stay safe there with your family! 🖖😊
Thanks a lot, MC! Glad to see you back!
Likewise 😊
This was the best video! 😍
Am definitely gonna try this project 💯
Thanks a lot, Abhishek!
Best of luck making your own one :D
Awesome Video Max!
Really Nice Tutorial! It works too good!
Thank you so much, Kaustubh :))
Very useful project, actually need one of those. 👍👍
Go for it! Thank you! :D
wow it does a fantastic job for such batteries
Thanks a lot! 😄
Congratulations! I will try to build one myself.
Thank you and good luck with building yours'!
Also stay tuned for the upcoming CZcams video where this spotwelder will be used in building a battery 🔋 ☺
Cool stuff 👍
Nice video Max 🔥🔥👍
Thanks, Raj! :)
Hi Max great video. It's so cool
Thank you, Tilly! 😊
Very useful project and nicely explained 👍👍🔥🔥
Thank you! Cheers!
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 🔥🔥❤
I'm so glad to hear that! Thanks a lot, ksp! Have a good weekend :D
Wwoww Awesome idea Max 👍❤❤
Thank you! :)
C’est excellent merci beaucoup pour l’exercice ❤
Thank you!
Great spot welding machine for making battery packs 😎😎
Yes, thank you! :)
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
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
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.
Great Work ...............
Thx, Viraj!
Wow! It' Is Amazing 👏 😍
Thank you! 😊
Great idea 👷👍
Thank you! Cheers!
@maximagination, is there any difference if the copper tips were closer?
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
I wish I could build this
You've got this! 🙌
I’m too little 😂
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
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.
Nice master 👍🙏..
Thank you! Cheers!
Nice video
Thanks, Kristoffer!
Awesome
Cheers 👍
Superb bro 👏😃
Best use of old components 👍
Yes, I guess I happened to make it 95% from recycled parts 😅
Thanks a lot, Sahil, take care!🤜🤛
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?
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
Very good 👌
Thank you! Cheers!
Half the audio is missing
Can you please make another remote control car video?(homemade) Like your vids :D
Will do, one day ☺
Thanks! 👍
@@MaxImagination Thanks, hopefully in the next video! :]
Why not fuse the live wire?
Good point... I forgot I left that out! Will consider adding one.
woow super
Thanks! :)
Feel free to watch a previous video: czcams.com/video/lH7QFKSR4ZQ/video.html
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
I thought that's how they're called tho 🤔
Glad I could give someone a laugh! 😂
@@MaxImagination I didn’t mean any hard feelings I enjoyed your video and had a chuckle please keep making the great content
@@joeymcclaflin5172 No worries... thanks a lot! 🙂
Hey you're the best *& Fast 👍 T V M vetrano from Belgium
Thanks for watching ✌🏻
Wow Superrrrrrr bro
Thanks!
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. ;-)
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
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..
Thanks for pointing this out! You definitely have a point here. I'll fix that! Thanks.
Your welds on the fuse are cold welded. Do some checking please.
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.
Waaa👏
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.
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
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.
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).