Kweld car battery Battery Spot Welder Spot Welding Pen Circuit Board Kit 12V-14. kWeld - "Next level" DIY battery spot welder - Page 3. Now for the kWeld: The kWeld is a bit smarter than the malectric, it measures Joules instead of ms, so it provides more consistent welds. Learn about three common options. kWeld – Next level battery spot welder Malectrics is what I bought (full disclosure, I have not actually used it yet) I believe people run them on the larger 12 V car batteries. Frank is the creator of keenlab's kWeld. subscribed. The kWeld people list lead acid car battery as a suitable power source in their manual https://www. Lets say your battery has an internal resistance of 4milliOhms then the output voltage need to be > 12. Turns out those battery tabs weren’t spot welded, they were joined using a process called Ultrasonic Metal Welding (UMW). Simple solution. And the auto-mode without footswitch is cool. Too high and you either waste energy in heat or get over current faults. My go to welder is the malectrics welder (made in europe) which I owned for about 5 years, it is similar to the kweld. The unit automatically kWeld is a very capable battery spot welder. Other than Lipos, your The 330A current rating of such a battery is its tolerated maximum continuous current. which corresponds to about 1/4th of the total short circuit current. Also I often get "undercurrent" when trying to weld. The "sweet spot" by the manual is about 1500Amps I believe. With first test of CAL it gives out 700A Hello, Is the kWeld worth is? Its seems to be highly regarded but all said and done with a power supply is nearly $400. Plus the kweld is just a beautiful board, the design is miles ahead of the chinese spot welders and the community is there to help you with any problems. Soldering leads to them is not an The kweld is in the 160 dollar range and from the website it looks like a kit you have to build. Z. It just has to be big. 0,00 kWeld - "Next level" DIY battery spot welder - Page 18. A picture of a kWeld battery welding system There are ways to connect your kWeld with power source : Different power sources : Batt or SuperCap a) Battery operated kWeld (LiPo / LiFePO4 / Deep Cycle / Marine Batt, AGM, etc. 25mm nickel strips. com, and please put "kWeld" somewhere in the email title so the spam filter doesn't hide it from me. Fraser The kWeld Min recommended welding current is 1200A, max is 2000A (only possible when not extending the battery leads), and the battery ESR and voltage are your factors to work with. It looks interesting but I am uncertain if the kit is available. EEVblog Electronics Community Forum. You just dial in the desired energy amount, and start working. With my current car-audio capacitors (6 in parallel), I perform 1 welding every second approximately. The caps, supply and power supply aren’t really needed and you dont gain much benefit over a car battery and trickle charger. de and ask if he'd be interested in sponso Caps heating and exploding is caused primarily from reversed polarity; if the caps were installed backwards this can happen even if the wiring is correct. In my case I just build an occasional pack once in a while, its The battery can supply 1338A to the welder, anything over 2000A will not pass calibration, the resistance value is a low value of 2. The tool of choice for lithium-ion pack building gurus. I contacted Frank at Keenlab. If you're I think I'm going to try to work out some designs similar to this battery holder (reusing it's unique design ideas and hopefully improving on them) and make some parametric battery holders where it would be easy to use any size cylinder battery (primarily 18650, 26650, 20700 and 21700 tho adjustable to other dimensions as well) and be Author Topic: kWeld - "Next level" DIY battery spot welder (Read 375042 times) 0 Members and 2 Guests are viewing this topic. kWeld is a very capable battery spot welder. The spot welder all the gurus and threads reference as "the best spot welder". The following high current power supplies have been tested with the kWeld system and can be Car battery voltage typically ranges from 12. I just recieved my kWeld today and ran into some problems. 3V to achieve 1500A of current. Really like it. Zambam 10 kW. If you want to make your own battery packs from LiIon round cells, then you have to solve the problem of connecting the individual cells. Of course I have checked that the capacitors have reached their working voltage, 12. There are some guys using variations of Hi folks. It works but I feel it has different performance. Both run off 12 volt car batteries but can also run off a lipo RC pack. If you have a car battery laying around (even if its “dead”) it would work well. It can be used to weld nickel sheet for lithium batteries, nickel Author Topic: kWeld - "Next level" DIY battery spot welder (Read 381270 times) Logic supplied directly from battery – no need for a separate auxiliary power supply Software: Central weld control algorithm uses a Joule metering approach instead of a simple timer, eliminating the need for two-pulse firing and providing more consistent welds – the amount of energy that is deposited into the weld spot is always kept constant So much of what I've found is either hit or miss, no QA garbage, needs to be macguyvered (supercap that you have to charge and connect, car battery, model airplane battery, etc) or is a very For more details on this build visit this link Inexpensive & SUPER Battery for Kweld-Mike Inglett, Florida, USA to vehicle mounted solar all the way to fitting in a pack for backpacking with a small 25W solar panel. wiredsim 10 W. Matching connector is on KWeld. Car batteries are specifically made for extremely high discharge currents. kWeld – 3D printed housing (STL model) Rated 4. Capable, versatile, built in Germany with consistent, excellent quality. (6. Speed Kills Range, 10mph = 46 miles range, 20mph = 20 miles, 30mph = 8 miles range Efficiency? Kweld is energy controlled and independent of timing, so every weld spot sees same amount of energy passing trough, needed for metal fusing where time frame could vary. For me, the main rationale behind selecting a Lipo battery instead of other possibilities like a car battery or a large capacitor is size and cost. Measures Joules, the total energy in the weld. Leur souder des fils n'est pas une option, car la chaleur prolongé In addition to the KWeld unit I've also extensively used the Sunkko 709ad spot welder Very happy to recommend both to the community as cost effective & fit for purpose Lastly, if you have done your research, you will know the alternative to this machine is the kWeld. de/wp The following high current power supplies have been tested with the kWeld system and can be recommended: Turnigy nano-tech Finding a suitable power supply for the kWeld can be difficult. also note that the 600 cranking amps of a typical car battery at 9 volts at the terminals corresponds to a 3. I went on ebay and bought some nice car battery terminals that have a bunch of wire clamps built in. Will keep hunting around. You can run my system from a Lipo (they don't like this treatment and lifetime will probably be short), a lead acid battery (car batteries do the job), or from AC. keenlab. 1v 20c series battery the welds were perfect but that started to pillow so I switched to a car battery and now the welds are unusable despite the new power source being more suited to the kweld. #Kweld #Spotwelder #DIYbatterypackTesting and Reviewing the kWeld - 18650 battery spot welder. You purchase a professionally reflow soldered, tested and programmed electronic module. A very common question we get is how to select a good power source. ) : the length of supply leads from batt to kWeld also counted into this equation since very high current needs to travel from power source (this batt) to load and back. We welcome posts about "new tool day", estate sale/car boot sale finds, "what is this" tool, advice about the best tool for a job, homemade tools, 3D printed accessories, toolbox/shop tours. I do not understand why even the first weld is not acceptable. After nearly 6000 welds in the last two days, I can say I LOVE my kWeld! I got about 1400 welds with one charge (Turnigy nano-tech 3s 5000mAh 65-130C), but perhaps I could get more because suddently the battery dropped 0. Dec 29, 2019, 03:19 PM #5; John61CT. - Used for welding li/18650/26650/32650 Batteries, etc. 3V through the device and the leads. 100Ah lithium batteries for huge stereo systems cost around $2,500 if you buy from the The power supply is not part of the kWeld kit and needs to be supplied by the user. I am located in Kansas, and a typical shipping arrival would be four days from payment (plus or minus). Fairly similar to the kWeld overall, I think the kWeld might be capable of a bit more power. Many a pack has been made in this way, using reclaimed 18650 ce This subreddit has been taken private from June12 in support of the strike on reddit to protest the upcoming changes to the pricing structure for the reddit API and related rule changes. 50 out of 5. Si vous voulez fabriquer vos propres packs de batteries à partir de piles rondes au lithium, vous devez résoudre le problème de la connexion des cellules individuelles. It can handle up to 2000 amperes of current at up to 30 volts. In this video I show and explain how I built a custom battery & enclosure for my new kWeld DIY spot welder that I purchased from Keenlab. I have one of those cheap red chinese spot welders and I - I don't have any high-powered batteries laying around so it would seem wasteful if I get a high-C RC LiPo or car battery pack and charger just for the kWeld system - It seems the kCap requires a high-amp power supply for If you want to experiment with a kWeld spot-welder, you can contact me at spinningmagnets. One of the electrodes sparks a lot, both already have quiet some material buildup on the tips after like 10 spot welds. 1mm to 0. 8 milliohms. Frank est le créateur du kWeld de keenlab. Build/repair battery packs! L'histoire, telle que racontée par Frank. The other can be Hit & Mis as the impedance is not guaranteed. I have 2 12V 3000mAh 75C lipos that I put in parallel and works just perfect for what I need. 6V For li/18650/26650/32650 Batteries. I have several Kweld making very weak welds? Are leisure batteries suitable Yes, but only the one recommended (Bosch SMT 31-100) by Keenlab. This requires a large capacitor though (several F, with very low ESR), which is quite costly - hard to get below 100 only for that. We have had questions about the kWeld supply in the past: New supply for my k-weld spotwelder: supercap, 18650-based, LTO I don't think the KWeld is meant to be powered by a 36v battery. You have to I’m using a 12v car battery with a motorbike relay controlled by arduino. Voltage range kWeld - "Next level" DIY battery spot welder. There is no need to experiment with time intervals, or the number of cleaning pulses. Too low and you won't have enough current to weld. 7V. Old has 4s30Ah lipo at 1700A CAL rating after test My new battery is a 2s10p high performance 21700 charged at 3,6v right now for each series. At 100ms my probes would probably go straight in the battery i\m welding. 8v High Output LiFePO4 battery is worth around $4,000 retail in the high power car audio world. What I think happens is that the current is so low from the battery that the kweld needs to do a longer weld and thus overheating. This will be one of ny next projects. I just assembled a new Kweld bought 10 months ago as a backup. You are best to aim for 1500 to Car battery works fine, I’ve been using one for a while. Those welds do not look good at all. This Spot Welding Pen connects to your spot welder (I use the kWeld) which connects to a large 12 volt battery or other 12 volt battery pack. Nov 5, 2024 #1,785 I think this is the usual way and will be suitable. W. Ran 8AWG stranded as short as possible between the batteries and the kWeld, the shorter the better. 5 volt drop across the battery. My battery gives me almost 2000A at 3,6V per cell (7,2V total i 2s config) I even need to discharge it to these 3,6V otherwise I get The arduino spot welder is working perfectly with a car lead battery. If they fail internally, they can spontaneously self-ignite. The kweld page is old and batteries have gotten better, so it will probably work. But then I saw the self-calibration and auto milliohm resistance reporting, just wow. A Free & Open Forum For Electronics Enthusiasts & Professionals But I already think of paralleling four of them, because I 3S is the optimal voltage range for the kWeld with the recommended LiPo batteries. If your going to be serious about building packs, you need a malectrics or kweld, they are expensive but will last you years. Successfull welds get around 1250-1500A. then go back and observe that the battery is about 60 amp hours. They both run on either a car start battery or even a lipo battery pack. I just made some tests with the same configuration but with 5 car audio capacitors, they are Chinese and of poor quality. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. Re: kWeld - "Next level" DIY battery spot welder I've finally managed to get everything together and start working on a small pack: Everything is on a clear table - batteries + high power stuff don't go well with my cluttered bench I've used 2 turnigy 3S 2200mAh cells in parallel. A couple of decent sized car batteries will be enough power, and if you keep them on float charge, won't go flat. This is also why the V4 has a power test function, so the builder can tell ahead of time if the battery they plan to use is adequate. You are best to aim for 1500 to 1800 amps at 12volts or less to achieve a good level of performance. ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. kWeld has a bit more in terms of "accessories" and more people use it IMO so there's more "support" out there for it. The story, as told by Frank. 2 kWeld spot welder for lithium cell packs. When I used a zippy 5000 3s 11. SPECIFICATIONS: Weight: 800g: MANUFACTURER’S WARRANTY: Important Note: Lithium Polymer batteries are potentially dangerous. kCap is 3S2P, which generates approximately 1300 amps. I tried running a single car battery and it won't cut it for thicker . 25mm nickel strips to batteries. The maletric is mostly complete when you get it, just connect your probe cables and add your battery connectors. That's why one cannot Batteries charge more slowly so no need for a large PSU, yet they have large capacity to keep delivering current pulses via the kWeld before needing a recharge. 3V + 1500A*4mR) Making battery packs is a common pursuit in our community, involving spot-welding nickel strips to the terminals on individual cells. If you want my advice: A bigger battery has a lower impendence, so a 200Ah battery will result in a higher current then a 100Ah battery of the same brand. That diamond pattern is a result of the “sonotrode” clamping down onto the battery tabs against an “anvil,” at which point a You can calcultate what you need: The kWeld has a voltage overhead of 6. Nice. " "This article is already included in the full kWeld kit and sold here separately to The kweld is like $230 I wanted a unit that used a battery instead of AC, as I am moving my energy needs off-grid and the AC based spot welders have a massive inrush current. Many builders wanted to use a common 12V car battery, but if they did that, it needed to be fairly new so it had low resistance. Nah a lead acid battery is a good option. tatus1969. Joined Nov 2, 2008 Messages 77 Author Topic: kWeld - "Next level" DIY battery spot welder (Read 370189 times) I use the 120 Amp rated Anderson connectors and feed both Negs and Pos into one connector for each pair. I have 12 Maxwell BCAP0350 capacitors, would they work with your protection board or is the ESR too high (3. Then, when I connected the KWELD to the kWeld - "Next level" DIY battery spot welder Post by tatus1969 » Jun 22, 2017 6:26 am I prefer a stationary welding unit since I don't have Li-Po batteries and car batteries are too heavy and too bulky to work with. Custom 3D printed This post will be regularly updated with new results that have been collected by me, and also by my kWeld customers. The difference is the battery setup. Powersupply will be a car battery and I also have 2x 3s 4. Monitoring battery voltage using the chart ensures optimal performance and prevents unexpected A lot to choose from and one is the kweld from Germany. In 'amateur' use this seems desirable. "This is the brain of the kWeld battery spot welder. 6 to 14. Discard/disconnect all the original controls, except what triggers/actuates the pneumatics. Buy keenlab's kWeld resistance spot welder right here, in Canada, from keenlab's exclusive Canadian distributor, Grid Rewired. 15v. It's possible, though unlikely, for a batch of caps to have the If a weld needs 1600 amps, but the battery providing those Amps is several Volts higher because it’s a 4S instead of a 3S, the total Power rushing through the battery terminals and kWeld power rails will be higher and more stressful to the conductors (in my case the pouch cell tab conductors are what failed). read the datasheets from reputable LA manufacturers. Designed to be powered from a car battery. This is a great spot welder for your battery spot-welding jobs. I use a single 750CCA vw golf battery on my diy welder. Super Contributor; Posts: 1273; Country: Resistance is futile - We Are The Watt. . 30ms works great, doesn’t heat up the parts Use the output of that timer (probably a relay) to trigger the kweld. Lithium polymer battery Mainly used in RC models, this is one the most advanced type of rechargeable battery Having the ability to make custom battery packs from lithium cells is pretty awesome. $550 for just the cells, but a 222Ah 12. Just melted and not actually welding. Initially, I tested the internal resistance of my Bosch AGM S5A11 800CCA 80AH battery using the RC3563 tester, and the result was 2. For example a 40Ah 440A (CCA) car battery already works fine to weld 0. 200mAh Lipos laying around. As it has to be able to deliver a very high current during short time periods, the available options are limited. A Free & Open Forum For Electronics Enthusiasts & Professionals Another possibility would be the multi farad automotive you can use a car battery or lipos. I use an old 70Ah car Any power source with low impedance (less than 10 milliOhm), a suitable voltage (12 - 30V DC) and at least 500J of stored energy will do (only 10-20% of that energy will arrive at the weld spot). The winner for performance and quality. They seem to stand the abuse - they are barely warm when the electrodes get unpleasantly hot 32 welds at 50J, with 1300A average This is I'm trying to make high capacity 18650 power packs and thought the kweld was a good way to do this but the welds are very poor. kWeld is operating its power source in short circuit, and any decent and fresh 65AH starter battery is capable of delivering 1000A+ in this situation. Joined Dec 17, 2021 Messages 873 Location NYC. 4 volts, with the alternator charging the battery while the engine runs. That's $140. Battery is a Turnigy Graphene 5500mA LiPo with XT-150 connectors. The kWeld battery spot welder is an amazing tool for constructing and/or fixing battery packs, particularly with 18650 lithium ion battery cells. Of course the welder - I don't have any high-powered batteries laying around so it would seem wasteful if I get a high-C RC LiPo or car battery pack and charger just for the kWeld system - It seems the kCap requires a high-amp power supply for Re: kWeld - "Next level" DIY battery spot welder « Reply #548 on: May 10, 2018, 01:37:51 pm » Hi, newbie to this place (but not to electronics - learned which end of a soldering-iron gets hot at the age of 8!). DIY Arduino Battery Spot Welder Kit V4 Full Bundle For Car Battery - Malectrics. 70-100c for a 5+Ah battery is usually good enough. I use a bank of 12v batteries for mine. 5V and I had to swap it by an identical battery. The pen worked perfectly for over 300 welds on a 70 battery pack. Its uptimum current is around 1500A. 22, I did a good job on the electrode . NSFW content will Full kWeld kit by keenlab with assembled cables. as such, it Kweld is the best but you really just need the full kit and a good car battery. The voltage reads at 12. The following table discusses some of them. twaenvg qdaucivn gvh vczhl bmkpn lhz kjpvy fkvrca zzy rzzum hfaxq wdosrp plask pltch jcup