kWeld - 2000Amps of Battery Spot Welding goodness! ll Assembly & Review
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- เผยแพร่เมื่อ 22 มี.ค. 2020
- Having the ability to make custom battery packs from lithium cells is pretty awesome. I contacted Frank at Keenlab.de and ask if he'd be interested in sponsoring a kWeld kitset, and he did! (thanks Frank). It's a brilliant product that gets my highest recommendation.
Buy your own kWeld kitset from here:
Rest of the world: www.keenlab.de/index.php/prod...
Australasia:
hiketech.com.au/index.php?rou...
kWeld Facebook community: / 1231246293681961
Song used:
Slenderbeats - Sage
Information provided in this video is for educational purposes only.
If you attempt to recreate/replicate anything you’ve seen in this Or any other video, you’re doing so at your own risk.
Schematix - วิทยาศาสตร์และเทคโนโลยี
Excellent presentation ; as an old engineer who's hearing is starting to go, I appreciated your enunciation.
When crimping the lugs to the cable simply crimp slightly until cable is secure enough to not move then open the crimper and rotate the lug one flat. Then continue to finish the crimp. When doing it this way you don't crush the lug between the jaws of the crimper. Removing any part of the lug weakens the crimped section possibly to the point of being able to pull the cable out. Using the correct jaws for the lug/cable combination is important.
For anyone wondering, fuses are separated into "family's" of speeds. The 300 amp fuse is fine for this application because it's not a fast blow fuse. You will generally only find fast blow fuses used in semiconductor protection as well as VFD's
That's some excellent content and production values. That kit looks amazing.
A lovely explanation and review, and an impeccable fashion sense!
Very professionally made circuit ,
Good explaination, commentry
well prepared, clear, comprehendible presentation with excellent video
Very cool bit of kit.... good demo 👍🏻
Just put mine together. Thanks for the great video! I have problems with written directions. I would have been lost without you. Thanks again!
No problem ;)
@@Schematix Mine is arriving soon, I purchased it before seeing this, but after seeing this video I'm confident in what I'm getting. :) PRICEY, but any tool that will last won't be cheap. And high current welds are nothing you want to 3/4 ass, let alone half! I didn't get the cap kit, and I don't have one already... lets see how I do with my 100C lipo pack...
IT VERKS!!!!! :D
I'm buying one. thanks for the review.
I shared this video with my Facebook Group, and they loved it. Very very very detailed video and one of the best explained how-tos on the kweld. I have a Kweld/kcaps with case coming and I know my video will not be as detailed. But I plan to add your video as a reference. Great Work!!!
Thanks for your encouragement! Glad you found it useful
Awesome content. Neat. Underrated channel.
Another excellent presentation... WELL DONE!!! 10/10
Weld done ?
You are the master of construction. Watching your video feels really exciting! Thank you for your dedication.
Great video, thanks for making it.
Robin Ward.
A video is a video. They are all the same.
What you fail to understand is that it is the "presentation" that is of importance.
And the presentation in this video is detailed and professional, with the correct cadence,
without the presenter bench-marking their Super Speed Speech.
Excellent presentation ...
Great construction tutorial, thanks 🙏
Nice presentation, impressive.
i liked the welder to,nice results.
love it how the cables twitch with the high currents
Great video! Thanks for sharing!
great thanks brilliant product!!
big thanks from Paris
Excellent item. I like it
Nice work
Thanks for the video!
Great Video!
That is a super nice kit
Awesome video thanks mate 🙌
excellent video...i have a question in the begining of the video you used a small wire cutter can you tell me who makes it please
Excellent !
Note that you can purchase crimp lugs with the same bolt size but for use with different thicknesses of cable. Get the lugs where the stripped wire completely fills the hole. Then you will get a tidy crimp without the burr. When buying the crimp lugs spend some time first finding which lugs fit which cable for the 3-4 sizes of cable you are likely to use.
EXCELLENT VIDEO !!!!!!~~~~~~
Funny and informative. Subscribed.
I was really taken with the idea of this compact welder for replacing battery packs but as I watched the video it was clear that more and more kit was needed with the cost going up all the time. Not even the case was included. I waited to see if the unit plugs into the mains. It doesn't so more expense and inconvenience with an additional battery or capacitor power pack. I then abandoned the idea of making this unit and will look for something more convenient. The project is not the welder, it is replacing the cells in the battery packs.
nice review once my other 6x welders die kwelds next on my list
Just a tip
Never tin cables that goes into a screw terminal. The tin will crack and the connection will eventually get bad.
And with high current there might be a fire hazard.
yes, i was used to tin everything, but i faced this problem many many times... a real pain...
You talking “tinning” as in tinning with solder? Or talking about the tin wire ferrules he crimped on..??
@@TylrVncnt I meant tinning wires
Hello! Can I use thicker wires for power kweld (35 square mm) and 16square mm for electrodes? Second question: What do you think about adding additional copper bus bars on thi other side of pcb?
hi Andrew , witch solution your advise for max amps , it could be , 12V TO 48V dc batt source , ??, infact need to spot more , thikness sheet metal from ,0.6mm to 1mm, thanks
Great video
Going to pick me one up
Looks like a good product, I'm sold, I gotta get one now, I'm tired of soldering!
I just put mine together. Order extra crimp lugs and read everything carefully. :) It's awesome!
Great video I was just getting worried before you used the ferrules, good Job. Cheers Steve
Why did you change the ends on your cables?
Very nice spot welder for batteries good video brother
When asked "In case of emergency, who should we call?'
The answer is always DOCTOR.
It is an obvious fact that only the Doctor can be of any practical help.
@@andrew_koala2974 lmfao
what do you think for 0,20-0.25mm nickel strips? which one is best kweld or sunkko 737DH?
Those MOSFETs are to the extreme! This product is well worth the cash outlay but I don't see a huge list of refits in my near future. Funny thing is that I have the same tired Makita L-Ion batts :)
Bought the kit like _ages_ ago and have only done some mild setup tests without actually using it for what I bought it for ( replacing the 18650s of my cordless hand blender ).
Trying to figure out how those welding tabs are called to buy them somewhere I watched through some reviews of recently released China alternatives and boi ( Kratos™ ) am I glad I went with the K-Weld.
For Canadian people, is this kit still possible to get a hold of?
Would love one of these. Unfortunately, by the time it makes it to my country, the price ends up being on par with the midrange Sunkko units. Out of the price range for a hobbyist.
Does it work with thin aluminum like aluminum can?
Seems expensive to get one for rebuilding a battery pack. Is there a cheaper way? Do people rent them out? Or can I find someone to weld the batteries for me? Thanks
Very helpful video, thank you!
You can weld copper 0.2mm on the cells?
I recently finished this build, unfortunately I get a ln error "Kweld 2.9, remove short"
i followed each and every step as you outlined but it comes right back to cal and never lets me go past not sure what i did wrong
do you think 5000mah 130c battery is enought to build 120cell battery in one charge?
One mistake shown at 4:26 - the longer input cable is the positive and should be on the fuse with the shorter connected to the buss bar (Page 9 of the assembly guide). The longer electrode (It's not a ton longer) should also be on the positive side.
Can anyone explain why that matters? I noticed the same thing when putting it together - and just assumed that its a way to identify which of the input cables is the positive one if they looked the same...on mine I used black heat shrink to "label" the negative input cable....
would two car batteries in paralel work for enough current ?
Would this work on aluminum?
thanks very much
bought a 250 cca lawn battery for 60 bucks. 500 amp starter solenoid for ten bucks and a set of cables for ten bucks. does the same thing for 80 bucks. does just as good. the spot weld is controled by a diy foot pedal momentary switch......
Nice video. I have refurbished some Makita batteries also with crude method of soldering used laptop cells. I question the economics here: 10 new cells are around 40$. The welder and accessories are several hundred. Plus the time spend. I recently paid 50eur for brand new 4Ah Makita battery. No economical sense, but it's a nice hobby.
Certainly not if your goal is just to fix one battery pack. But its a tool you now have in your inventory for similar work. I spent quite a bit of time making up cables - and making up an enclosure. I'm retired and this is just a hobby - but I can see other folks making another call...my son-in-law will be happy to inherit this when I pass....🙂.
@@romanykemp9042 That is how I feel. I plan to give all my high quality tools to my sons (God willing). This way they won't have to buy them and will have excellent tools on hand.
What do you reckon of all the aliexpress battery powered ones out there? Seems like all this diy stuff is now a thing of the past no?
That "burr" as you call it on the lug is because you are using the wrong size lug for the cable, or the wrong size die on the crimper, or both. As Steakbrotchen said, tinning flex before putting into a screw terminal has been specifically "outlawed" for want of a better word, for well over 13 years. Ferrules are always the best solution. This is due to cold flow, a property where the solder compresses over time and the connection becomes loose.
Would you recommend this as a good starter spot welder and or main spot welder?
Depends on what you are planning to do with it. I'm in the process of reviving 4 V-lock batteries (professional video-batteries) that come with 16 cells each and have been pronounced dead by the BMS inside. With all the welds I need to do and the price of a new battery, I consider it a good choice, especially concerning the reviews you find about the Chinese stuff that either isn't up to the job or breaks down fast after purchase.
So for me, after experiments with a 200.000 uF capacitor unit, which were scary, unreliable and had a very hard time welding 0,3 mm strip, the Kweld seems like an excellent choice, especially when I read how many people just weld away with this thing with ease.
Considering the price and the items you need besides the Kweld itself (the kit is already expensive at close to 200 euro's (including shipping, cables supplied loose) (yes... the price excludes VAT, not very nice to NOT mention that on the website) (EDIT: mentioning VAT was either added on the website or I (unlikely) missed it, it's there now) I can really relate that people aren't completely happy about spending close to 300 euro in total for this thing. But besides my V-lock batteries, I have had more occasions in the past where I was like 'If I could only spotweld...' so the Kweld will be used after I complete my v-lock batteries (this all said that I can circumvent the BMS-software in those things...)
The guy that made this thing has his own TH-cam channel: th-cam.com/channels/HdQgHkYvGcrX2Jh09NvXug.html
Seems like 3D printer also required for casing... Is it... Its again extra cost, is that 3D printer can use any other purpose or only for this spot welder...? Lets say if I want Drive belt pulley can I use the same 3D printer or for that so we need another printer...?
Please reply
kmurali krishna
The solution is so simple you have not thought of it yet.
Outsource the manufacture of a suitable case.
Another option is to GOTO AliExpress and you will discover
thousands of manufacturers and suppliers of Electronic project
cases at reasonable prices and you will find that there are many
suitable choices that can be adapted for the purpose.
hello mister
cheers from athens greece
i want to open a ebike actory here have you a idea about a similar product that may look here in europe??
very useful video, can you share your caps concept it will be very useful if you can do that
I would be appreciate if you make video on how to fix simple electric fishing with simple tools and components
Just take my money!
Did you need any support material when printing the top half of the case?
Yes it definitely needs support material for the lid
@@Schematix Did you put the support material in or did your 3D printer do it automatically?
@@harryhino2267 I use Cura software. You can choose from several options of support material. I chose "Touching buildplate"
@@Schematix Thanks mate. I'll have a scratch around. Keep up the good work with the vids. I like your style; simple, easy to listen to and no hooting and hollaring.
hi. please could you tell me what type of filament to use in the 3d print as i don't have this facility . i need to ask a friend to print mor me.? but he said there are so many to pick from so ?? witch one is good and why. please
PLA should be more than adequate.
you can buy a laser cut case from their website as well
"mother on speed dial" hehehe Nice. "kkkeeeeeeyyyORNTACT!"
How I can preaches it my what's up number 7000367984
mother on speed dial, a condom and make sure you filter any oxygen supply through a cigarette
Lol Ave reference
does this use magnets as i am not allowed to be near magnets, I no the old spot welders used magnets.
I notice on there website its 159,00 € which is $17439.12, They put a comma should it be a period, How much would it be for the spotwelder in USD dollars.
Thank You!
where can you get the housing?
do they sell this in the USA? if so where?
What about the case? The kit does not include the case, is it assumed that we own a 3D printer?
11:47 why does weld cables jerk when you weld? does electrons have physical kinetic energy like water hose?
When current passes through a wire, it creates a magnetic field. Normally the magnetic force isn't strong enough to be visually noticed. However in this application with hundreds of amps flow through the cable, the magnetic field is strong enough the cables repel/attract each other. Pretty crazy aye
You think its possible to spot weld 0.2mm thick copper strip? Thank you for your time!
james hallet
Why would you wish to spot-weld copper strip, and what is the application of
the copper strip?
COMMENT REFERENCE: james hallet.2020102570424
hi guys need the complete set mounted of kweld , is the output current dc or ac , need dc current to weld and spot some aluminum , sheat parts ,thanks
Naoufel Melayh
SHEET not SHEAT.
The welder, as all welders operate on DC.
I cannot be more direct than that.
Why does the cable jerks when welding?
167€ kweld+139€ for a capacitor pack + 70€ for a power supply +16€ for a software update tool and finally you have to swap the wires with thicker ones and print yourself a case. Doesn't seem a cheaper version than most of the AC stations out there.
kosio86
That's the price of doing business.
When you only need a 'Hobby Tool' buy that inexpensive item and be satisfied.
When one needs or wants professional, reliable and long-lasting, well-engineered
equipment one has to be prepared to make the investment.
You then have to think about how you can make use of the expensive equipment
purchase to recover your investment.
@@andrew_koala2974 I guess a professional will buy a professional system and not a diy kit tho...
@@robinm.790 It depends. 2k euros for a professional system, low end. This is a viable option for starters.
Yeah, better to buy a real welding tool with everything integrated inside the box. Instead of this.
That thing should be great for exploding small resistors with a bang.
ten littleindians
You wouldn't be able to resist that as you are such an infantile child
and not a full box of chocolates.
I'm totall novice, how come you can hold both tips with bare fingers? what am I not seeing here.
I need it
Would you like to review Sequre SQ-SW1 spot Welder?
Note: Never twist wires before crimping. They'll potetionally untwist and thus loosen up and slip out of the ferrule.
if they can untwist in a crimp, your crimping tool should go straight into the bin
@@drkastenbrot Best answer this century.
Thanks great
So you gave 159 euros only for the pcb, the pods and the pedal and without the power source. I believe on this level of money you spent, there are way better alternatives. Regardless of all these, your presentation was perfect. I subscribe :P
11:43 man.. look at the cables. is that the reason they limiting the length of the cable?
522Amps is not a mosfet rating but a body diode, realistically mosfet is rated at 240Amps with proper heatsinking...
One of Makita batteries has just gone faulty - I doubt it had done a third of the work yours did before their problems.
it always out of stock when I look it up
got a Sunkko and it worked out OK, sort of
would have much preferred a kWeld
Keep checking the website. I wanted to order it as well when it was out, something like a week later, they had them in stock again. I guess it's a very popular item (with reason)
Need to make it easier to get in USA!
so, you need power source as well?
Yes, two car batteries in parallel should do the trick. The key is getting close to that 1500A mark and keeping the leads to the power source as short as possible.
Can you spot weld LEDs
I suggest one spot weld then Twist , That's my opinion
3:15 So all the current goes through the zinc plated washers, why?
I think it's tin plated copper, could be wrong
@@TheAviation101 Nope, that's standard zinc plated hardware..
@@JustinAlexanderBell You are right, it's zinc plated steel with the kit. You can buy silver plated copper and tin plated copper washers though
@@TheAviation101 Yeah, or he can assemble the stack correctly.
@@JustinAlexanderBell It is assembled correctly, kid.
Why can’t these devices be purchased completed and ready to use?
Cable shrinking p*rn! Great vid!
Why look at the fet body diode current rating?
Nice spot welder nice price unfortunately can not welding 0.2mm copper and nickel strip at once.