kWeld - 2000Amps of Battery Spot Welding goodness! ll Assembly & Review 

Very professionally made circuit , Good explaination, commentry

Weld done ?

Thanks for your encouragement! Glad you found it useful

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

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 ...

I just put mine together. Order extra crimp lugs and read everything carefully. :) It's awesome!

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

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.

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

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....

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.

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 RU-vid channel: ru-vid.com/show-UCHdQgHkYvGcrX2Jh09NvXug

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.

ten littleindians You wouldn't be able to resist that as you are such an infantile child and not a full box of chocolates.

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

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

if they can untwist in a crimp, your crimping tool should go straight into the bin

@@drkastenbrot Best answer this century.

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.

PLA should be more than adequate.

you can buy a laser cut case from their website 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.

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

Naoufel Melayh SHEET not SHEAT. The welder, as all welders operate on DC. I cannot be more direct than that.

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.

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.

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)

I saw in a different video that it does, yes.

Yes, it sure can. I've welded 0.3 to 0.3 without breaking a sweat!

@@Schematix thanks for reply i have made an order last night cant wait to try finish my 134.4v ebike battery lol.

I have both a Sequre SQ-SW2 and a kWeld, and the difference is night and day, i cannot get my Sequre to do a nickel-copper sandwich at max, and the kWeld does it effortlessly with 0.15mm nickel strip and 0.1mm copper at only 60J, and it's spotwelded so well that i literally bent the bottom of an old cell (and tore pieces out of the strips) when i ripped the strip off with pliers with the Sequre at 99ms (max) it couldnt even get it to really stick to the cell the kWeld can go to 500J so.. yeah i'm happy with my investment for sure I use a Gens-Ace bashing series 8000mAh 3S1P 100C LiPo, i get over 1200A per weld which is sorta on the meh side but more than good enough, i believe it may infact help as the less current pulse takes longer and gives more time to the material to heat up

I think that was just from his hands moving around

Tylr Vncnt 11:57 - no hand movement. So is it a magnetic effect?

So is it a magnetic effect?

@@gavinward5448 Yes. I have a floor mounted pedal operated spot welder in the shed rated to 10,200 Amps, I use a light to illuminate and if it’s it’s too close it gives a good jerk.

@@gavinward5448 ...Yes. The classic physics experiment is to connect a slack loop of thin wire to an appropriate battery or power supply. When current flows, the wire tries to form a circle to maximize the loop area. Multiple insulated wires carrying current in the SAME direction will crowd closer together.