welder welding While making this spot welding machine I faced some issues which I fixed and I am 100% sure you will also face the same issues. DIY Portable 12V Battery Energy Storage Spot Welding Machine PCB Circuit Board Welding Equipment Spot Welders Accessories Specifications. Greetings, is the webstore still active in selling the product?..It seems that I cannot send my email inquiries.. Im not sure where youre getting your info, but good topic. With the given current output, its max power is rated at 1.5 KW for the best possible welding performance. The connections are quite clean. You cant use them at 4166A however (2000A max for kWeld), and heres where the problems start: you would need to lower the voltage in order to stay below 2000A, and then they might not anymore store enough enery for more intense welding pulses. Let me play the simulation so that you can easily understand how this circuit actually works. Recently, I purchased this 2nd hand Microwave Oven transformer for around 15 dollars. You could reach 1500A with a 4S but you decided that 1300A was sufficint while not increasing the product price substantially. Hi Frank, welder Altium Designer enables engineers to effortlessly connect with every facet of the electronics design process. Typically this is around 15%, so that number results in 111780J of welding pulse energy, or 2235 pulses of 50J each. Anyways, you can see I am able to perform the welding, the nickel strip is welded to the battery, but looks very dirty and this is because I dont get enough time to press the other electrode and the current starts flowing. Prices include VAT and duties(if applicable). I think I misunderstood you but now got the point. It comes with 6700mAh high-rate rechargeable battery which lets the device work continuously for 18 hours on a full charge. Sunkko also makes higher-end battery spot welders that not only offer standard performance numbers but also additional features which you would expect at the given premium price tag. You can adjust between these using its inbuilt microcomputer which offers high precision and high efficiency by using just the required amount of power. 2S isnt enough voltage for the welder. I shall post my measurements of the LTO battery system on reddits /r/batteries and in this thread. And because this is a premium offering from Sunkko, it also includes their standard 1-year warranty. As you can see, the positive leg of the capacitor is connected with the common leg of relay1 and the other leg of the capacitor is connected with the Gnd of the 12v power supply. What are your thoughts about prismatic Lithium-ion Titanate cells? When the push button is pressed, the relay1 is turned ON and the capacitor starts discharging as it uses its charge to power up the relay2. 2000A is the max of this arrangement, unless you further reduce inductance by shortening leads. Finally, I placed everything inside this box. While you may not have heard about Sunkko in the past, you can certainly consider its battery spot welder if you want something made for heavy-duty usage. This capacitor actually controls the ON time of the Relay2. kCap is 3S2P, which generates approximately 1300 amps. Is the source code available ( I am quite familiar with STM32) ? This includes things like spot welder, foot pedal, battery holder, welding needles, wrenches and screwdrivers, fuse tubes, and nickel platings.

document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Get great content that you love. Regarding current handling: I use to take such datasheets numbers with caution.

You also get a decent work cycle rating of 20 pules within a minute. I replaced these soldering iron bits with these homemade copper electrodes. This is necessary to ensure that the current is low enough when opening the switch. It works best from a power supply in the 12V region. Ltd. is becoming a reference point as it is the trend of the day because very few companies provide end-to-end solutions like us. You cant ballpark via LTspice either, as this is a network with quite a few unkowns >> If I have a known measured capacity, a know voltage before discharge, a known voltage after discharge and an exact discharge time why cant I estimate the current and overall resistance? Yes, that isnt a bad idea. If the weld quality is not sufficiently stable a dual pulse could be used. (https://forum.esk8.news/t/kweld-spot-welder/6926/99). I am using these homemade copper electrodes and I am still happy with the results, for professional welds you can order some good quality electrodes. Before, I am going to explain other things, first a few words about the sponsor of this Spot Welding Machine Project for helping me purchase the required components and tools. The Soldering iron bits are connected and the 220vac on the transformer primary side is connected. While this entry-level battery spot welder is highly powerful for all kinds of spot welding requirements, it, unfortunately, does not mention any current output rating. They have a series resistance of 5m Ohms, so 3 in parallel =1.7 mOhms the kweld adds another 3.3 mOhms a typical weld adds 1m Ohms so a total of 6 mOhms. I am not developing a competitor device I just want to increase the applicability of Kweld. Using this push button we can turn ON and turn OFF the relay1. Other than standard dials and switches, a few models also offer display modules for ensuring that you are running your battery spot welder at the right power output. >> as I described, kWeld does not need that, it produces optimal repeatability because of its energy metering approach. I did find your ESK8 post where you explained the 6.3V overhead and the 1.5V/milliOhm for the batteries. The 2000A limit is due to the need to dump all magnetically stored energy when interrupting the current. Download Simulation: spot welder simulation in proteus. LTO batteries are the future of energy storage and will become a lot cheaper (and better!) That system can even hit the 2000A current limit during calibration and may require sigthly reducing their voltage for that step. Cheap DIY Portable 12V Battery Energy Storage Spot Welding Machine PCB Circuit Board Welding Equipment Spot Welders Accessories Wholesale. But double-pulse operation wouldnt be possible (unless using a second capacitor bank for that), and what to do when the unit needs to interrupt the current due to a fault? Our solutions are highly scalable enabling services to be provided at a time and pace that meets both business requirements and budget.

The unit handles varying conditions very well as it is right now. Since Mophorn is a popular brand, you also get a 1-year warranty along with it for peace of mind. You have been completed the task of "Browse and add 3 products to cart".Please return to VIP center to receive your points. I have designed this simulation for you guys, so that you can easily understand how this circuit actually works. As for using the welder, most of them allow you to do this by either pushing the welding head upwards or by using an included foot pedal for ease of use. The problem with these bits is that, the bits itself get welded to the nickel strip. *Please Note: These are affiliate links. This warehouse cannot ship to your location. You cant use them at 4166A however (2000A max for kWeld) >> the current when the MOSFETS are switched off is 1700A (well under 2000A) From your documentation I understand that the current limitations is because of UIS rating of the MOSFETs. The reason for both cases is the significantly higher thermal and electrical conducvitiy of these materials in comparison with steel and nickel. As welding power is proportional to current squared, that drops even quicker. Relay1 is also OFF. The MOSFETs cannt handle much more current either, tested max is 2800A but they only survive a few thousand shots at this level. Just send me an email, and I can answer your questions (also much quicker). >> Thanks alot for that, I will. k'$oZoBaG+f,%B\G\/&pj}fY\JY1mZ-d45*&kXH! As it comes with adjustable manual and automatic modes, you can choose the mode according to your requirements. But its impossible without a fully automatic or semi-automatic control system. In this article, I have also explained why not to use the Steel or soldering iron bits as the spot welding electrodes. For the perfect weld you will need to press both the electrodes so that there is a strong contact between the welding surfaces.

I am sure you have fully understood how this circuit works. Is there a reason why my question is censored?

With this basic setup, having no automatic transformer disconnection circuit you will have to be very careful and very quick, because if you touch the electrodes for even 2 seconds you could easily damage the lithium Ion batteries and this is something that you really dont want. For using this spot welder, you can either use its included foot pedal or rely on the push-up welding head as per your liking. View cart for details. Cheap DIY Portable 12V Battery Energy Storage Spot Welding Machine PCB Circuit Board Welding Equipment Spot Welders Accessories Wholesale. Thanks for excellent information I was looking for this info for my mission. Copper electrodes for spot welding machine, Nickel plated strip for lithium ion batteries. If they get too hot, they may stop working because of which you have to use special tools for welding them. That wouldnt be the case when using less cells. Now I determine the current by parameter estimation of a LT-spice model which also predicts the current but direct measurement is simpler. Overall this is in the low three digit microOhm region. Although, you do get a 1-year warranty with this spot welder which is always great to have. When I press the first electrode the nickel strip makes a strong contact with the battery surface, now this is the perfect moment and when I press the 2nd electrode, I dont get enough time to press the nickel strip against the battery surface. But with a tremendous advantage that I can influence the initial current greatly by setting the charge voltage of the capacitors. K1 vs 90 for nickel) is the problem. Required fields are marked *. Simple and intiuitive user interface - just adjust the desired weld energy up to 500 Joules with the dial knob; Overcurrent monitoring aborts pulse when triggered, protecting the power switch. The Sunkko 709A battery spot welder offers multiple control options making it a highly versatile and customizable battery spot welder. I used tooth saw and a grinder. Seller assumes all responsibility for this listing. Enjoy Free Shipping Worldwide! I have a basic set-up working that does not do metering, but it would be nice to have simple and direct way of measuring the current. I connected four 12 volts batteries in series to get 48 volts. And while most of them are quite easy to do, the same cannot be said about welding electrical connections with batteries. Paying with Installment (credit card) or Boleto Bancrio is only available for orders with shipping addresses in Brazil. Also note that the absolute max current is 1900A. Our systems typically utilise GSM (global system for mobile communications) and GPS (global positioning system) technology like VTS, GPS vehicle tracking system, tracking systems for vehicle,vehicle tracker, GPS tracker, avls, GSM modem, automatic vehicle location systems, GPRS modem, GSM GPRS modem, GSM module, GPRS module, GSM GPRS module, GSM antenna, GSM GPRS antenna, GPS antenna, GPS tracking, vehicle tracking, vehicle tracking unit, GPS tracking unit, vehicle tracking device, GPS tracking device, tracking device, tracking unit, fleet management systems, fleet tracking, asset tracking, personal tracking, personal tracker, GPS personal tracking systems etc. If you want to practically see everything then watch my video tutorial given below. Next, I used a 16mm wire which was 6 feet long, you can make it 7 feet if you want slightly longer wires, I used this wire as the secondary winding. Diy battery Spot Welding Machine, Homemade Spot Welder with automatic circuit, Before, I am going to explain other things, first a few words about the sponsor of this. Because putting more power in the weld enables to weld >> thats exactly what I am saying the more current the better. (3) These estimates are based on normal circumstances and are not a guarantee of delivery times. But, before I am going to connect the electrodes, first I am going to check this setup. Took 3 weeks for item to be shipped. Another problem with this basic setup is that, you will need the help of some other person to press the nickel strip for you to get a nice surface contact between the battery and the nickel strip. This qualifies as a wholesale order,place an inquiry to receive our best price. >> youd need multiple of them, distributed across the bus bars. we depend on ad revenue to keep creating quality content for you to enjoy for free. I have already shared with you the test results. >> thats possible, please contact me via email and I can create a custom firmware for you. Neverthess I have some questions please regarding the power supply: To help you out in picking the right one, we have explained all the features and details of these various battery spot welders.

Unlike most other battery spot welders, Sunkko also offers a temperature range of 150 to 450 degrees which ensures that you can easily work on all batteries. ?Limited Time Sale Easy Return. For starters, you get a welding thickness range of 0.05 mm to 0.2 mm which is used by most users. Im sorry but may I know the background for these questions? As soon as I touch the 2nd electrode there are sparks but no strong welds. You can also post any questions down there if you have any! Keep in mind that not only the battery ESR has to be overcome, the welder contributes ~ 3milliOhms and a typical weld spot has another 1milliOhm. This YaeCCC 737G battery spot welder comes at the 3rd position of this article because it is the cheapest option present here that manages to offer an excellent value for money. With a 1.0mR resistance it would be slightly better then your ultracapacitor module (1.1mR for a 2P) while having all the advantages of a normal battery bank. So, here is my spot welding machine and now I am going to explain the making and how to fix all the issues. They also have their significant features and details explained above along with a complete buying guide. You are stressing the 2000A boundary but that is when the current is switched off or am I missing something here? The specifiction is based on actual experimentation and long term endurance tests. It doesnt matter if the push button is pressed for a long time, it wont do the welding. The battery pack was too heavy and I also had less control over its management, and moreover the lead acid batteries are not durable and plus you will have to regularly check the electrolyte solution level, because the Lead Acid batteries when dried, the cells will get short circuited and it will damage all the electronics. I have been doing Job in UAE as a site engineer in an Electrical Construction Company. It is possible thanks to the performance numbers of this spot welder which has a welding thickness rating of 0.05 mm to 0.2 mm. Apart from these crude parameters I was also able to estimate internal resistance of my capacitor bank, the resistance of the electrode cables (confirmed with a kelvin measurement with my DMM6500), average fuse resistance, the electrode loop inductance, the input inductance, etc etc, If I put in a model of the SLD8S28A from Little Fuse I can even forecast the TVS peak voltage within 0.5V and the TVS pulse time within 0.5us compared to what I see on my scope. So, for making these series and parallel connections, you have two choices. So for 6 that would be between 91 and 125uOhms but would be nice to know what number you use in the software. To ensure this, it is highly important to use a powerful enough battery spot welder that can properly spot weld all kinds of wires on all kinds of batteries. Slow response from seller. As you can clearly see one wire from the 220Vac supply is directly connected with the transformer primary winding. For the sake of this simulation I selected the capacitor value 1000uF while the actual value is 100uF. With this, you can easily spot weld a lot of batteries before waiting for the work cycle to refresh which is always great.

Is there anything wrong in my assumptions? But why do you want to influence the current? And it gets charged within 3 hours. What I also do not understand is why kweld cannot benefit from the fact that when a capacitor is discharged also avalanche energy is reduced. Now, this setup is the most basic setup and most of the videos and articles explain this much of the work, which is not sufficient. Use some with at least 5kW pulse ratings. Two arent producing enough voltage, use 3 in series. As for its performance numbers, this spot welder also supports a welding thickness of 0.05 mm to 0.2 mm. Zentek Electronics & Communications Pvt. While the other wire from the 220Vac is connected with the other end of the primary winding through this relay2. When the entire system is powered up, means, when the 220Vac wires are connected and the 12V dc power supply is connected. Another though making the Kweld a real capacitive discharge welder: What would happen if I would connect 3 of these capacitors: https://eu.mouser.com/ProductDetail/KEMET/ALS70A135QT025?qs=AQlKX63v8Runp47hJ6lW9Q%3D%3D charged to 25V to kweld and set the energy to 67 Joules? Now, we also have the following complete buying guide regarding battery spot welders in this listicle for helping you in your buying decision: Since some batteries are quite small and others are large, you also need to change your spot welding size respectively. Hello i need to weld lithium pouch with copper anode and nickel cathode on aluminium bus bar. Leave feedback about your eBay ViewItem experience, 12V 18650 Li-Battery Energy Spot Welder PCB Circuit Board/Auto Spot Welding Pen, - eBay Money Back Guarantee - opens in a new window or tab, cleared payment - opens in a new window or tab, - for PayPal Credit, opens in a new window or tab, Learn more about earning points with eBay Mastercard, - eBay Return policy - opens in a new tab or window, - eBay Money Back Guarantee - opens in a new tab or window.

Gave me an excuse that they had just come back from a holiday. Please ensure you follow all the instructions contained in the message. My two cents: In principle yes, only note that the voltage of 5.4V will be too low to have sufficient weld current. Currently, I am running my own YouTube channel "Electronic Clinic", and managing this Website. Despite having a lower thickness rating, this battery spot welder is still able to offer highly accurate welds thanks to its high welding current output of 50A to 800A. Next, I started off to remove the Secondary winding, seriously this was the only difficult job, as I had to be very careful. Say that is 4000A you will still have not problem. I simulated the circuit with LT-spice and a 1uH inductance and get a little bit of different values but the idea remains the same. This is primarily due to the reason that this welder machine supports a welding thickness range of 0.01 mm to 0.15 mm which is quite lower than others.

The GND of the 12V power supply is also connected with the relay coil. Usually, battery spot welders offer a work cycle of about 20 pulses within a minute. Also understand that kCap has such a large capacity that it can achieve constant current and voltage during the weld. Just send me an email, and I can answer your questions (also much quicker). In that case, you will need to use something like the best battery spot welders present above.

ZHUVATAR store spot welder is suitable for people who want a budget-friendly and still need a model with decent performance. Enjoy Free Shipping Worldwide! What I also do not understand is why kweld cannot benefit from the fact that when a capacitor is discharged also avalanche energy is reduced. You cant ballpark via LTspice either, as this is a network with quite a few unkowns. This transformer is designed for 220Vac and 50Hz. This device uses a contact resistance between spot welder and substrate contact point which bond the points perfectly. Good communication with seller, they where able to resolve issue I had. I want my transformer to turn ON for a few milliseconds and then it should be able to turn OFF by itself. If you Buy It Now, you'll only be purchasing this item. Apart from spot welding, this battery spot welder also supports battery testing and battery charging making it a great all-in-one station for working on batteries. is it possible to use a standard 12V car battery instead of the 3S Lipo? Maybe you can explain to me where this estimate would fail and where the electrons would go? Route it your way through any angle, tune for delay, Push, Slide, and Walkaround faster than ever. With higher temperatures, you can easily work with most batteries and solder metals. One easy way to check this is to look at the welding current offered by your machine. 0.1V per 1000A seems low use of the dynamic range of the AD converter. I have done all the soldering. My board have UIRFS8409. It is also equipped with safety features so when the temperature of the welder reaches higher, it automatically stops working to avoid the damage. You can see this spot welding machines is doing great. We have been able to survive in the market for the last 12 years as we have always strived to maintain and improve the technology by which we are identified by our customers. kWeld does the rest then with its energy metering. If the battery is pretty good and the internal resistance is very low, and then there may be large current overload. Get a 10% discount for your first order! You can use a digital multimeter to check the winding; if you hear the beep sound then it means the primary winding is good. 20-45ah Lead-acid battery with good performance and small internal resistance, 2. Id say none of the other MOSFET based DIY spot welders can kWeld has the highest current rating among all of them. U1v)^'m~y4[3?wl%IJ1ogL!.0 d9.

Altium Designer is the worlds most trusted PCB design system. This first test was quite easy, I simply connected the 220Vac supply, and I slightly touched the two ends of the secondary winding and I could see sparks. Microwave Oven transformer is the best choice for building a homemade spot welding machine.

The MCU and its internal ADC are fast enough to track the current at this speed.

But you can use these steel bits for welding metal parts together. DIY Portable Battery Storage Spot Welding Machine PCB Circuit Board Welding Equipment Spot Welders for 18650 26650 12V, - Can be welding 18650/26650/32650 lipo battery, it is portable, stable and reliable, 1. I like that idea, and this would be possible with kWeld in general. Imho I do not see the benefit of the solution compared to a Lipo or kCap unless you can get them at a bargain. However, the unit would need to know the capacitance, and would also need to control the charge voltage. In that case, you need special tools due to which we are here with the best battery spot welders that have been chosen as per these factors: Surely these factors can come in quite handy while picking the best battery spot welder for you. My 2, Anyways, you can see I am able to perform the welding, the nickel strip is welded to the battery, but looks very dirty and this is because I dont get enough time to press the other electrode and the current starts flowing.

Talking about its supported batteries, this battery spot welder can be used along with 18650 and 14500 batteries which are the two most common types out there. Sunkkos 788H battery spot welder comes at the 2nd position of this listicle as this welder offers similar results to a standard battery spot welder. !D0H$Du}k';UR @ffbVWWWWUW/l>xoKg9UpP6Xpq^Z7Zy=qxaPZ>]%(fIyDKv6O7/p77'JG\0lmm?fj_]\}8i={Tk'v-`~6.8asbk foU[_W'k5u!F\tvg>YK}R/bV? Are there possibilities to do e.g. I will be ordering some new cables and electrodes very soon. You can start with a 50uF capacitor; keep increasing the value until you get the desired output. 2.5kA if I reduce the loop area because that drastically reduces induction. However, this is only possible when your battery spot welder also supports variable welding sizes or thickness ratings. The 3S vs 4S for the kCap was primarily an economic choice I assume then? So, If you touch the soldering iron for a long time, there are high chances of battery damage and moreover with the soldering, you will never get neat and clean connections, if you are not a pro. Fb23\w-248\Yl]q%q@iox5ef2Y There is also another set of winding, which is the secondary winding and I dont need this winding. This isnt the same as controlling/influencing the current like you asked. Mini Land, Mini Golf Hiranandani Gardens,near Powai Plaza Cts No6,,powai Opposite Hiranandani Garden Hiranandani, Powai Mumbai - 400076, Maharashtra, India, Spot Welding Board DIY Welder PCB Circuit Module, DIY Portable 12V Battery Energy Storage Spot Welding Machine, Mini Land, Mini Golf Hiranandani Gardens,near Powai Plaza Cts No6,,powai Opposite Hiranandani Garden. variations of resistance can be due to pressure changes that is why you see often a spring mechanism

While cutting the secondary winding be very careful and dont cut the primary winding otherwise your transformer will be just useless. And since this is combined with a high welding current output of 50A to 800A, you can use this battery spot welder for highly detailed circuits with ease. Therefore, it is always a great idea to check the included warranty of your battery spot welder before buying one. I have the impression it should be possible but I didnt read anything on that, so I prefer to ask. Just make sure to stay below 2000A all the time, thats its limit. But I admit your mosfets and driver must be able to do this. So, the Soldering iron bits or steel bits should not be used for the battery spot welding.

(4) We are not responsible for the failures or delays in delivery resulting from any force majeure event, such as natural disaster, bad weather, war, customs issues, and any other event beyond our direct control. So, thats why I decided to make my own 48 volts battery pack using the Lithium Ion battery cells. If you'd like to get the additional items you've selected to qualify for this offer. the protection diodes.

https://www.keenlab.de/index.php/product-category/kspot-welder-kit/, https://www.keenlab.de/wp-content/uploads/2018/07/kWeld-assembly-manual-r5.0.pdf, https://www.keenlab.de/wp-content/uploads/2018/07/kWeld-operation-manual-r3.0.pdf, https://www.keenlab.de/wp-content/uploads/2019/01/190128_kweld_release_r2_9.zip, https://www.keenlab.de/index.php/product/kweld-firmware-update-tool/, https://endless-sphere.com/forums/viewtopic.php?f=14&t=89039, http://www.eevblog.com/forum/projects/guesses-on-what-i-am-attempting-here/, https://www.keenlab.de/index.php/portfolio-item/kweld/, http://www.eevblog.com/forum/projects/guesses-on-what-i-am-attempting-here, https://www.youtube.com/watch?v=WdDi1haA71Q, https://secondlifestorage.com/t-Easy-to-3d-print-K-Weld-electrode-housing-files, https://hobbyking.com/en_us/turnigy-alpha-6500mah-2s2p-140c-premium-hardcase-lipo-battery-pack-roar-approved.html?queryID=aad608d5bcc29a4bf0dc869778304ff1&objectID=85619&indexName=hbk_live_magento_en_us_products, https://hobbyking.com/en_us/turnigy-rapid-5500mah-3s2p-140c-hardcase-lipo-battery-pack-w-xt60-connector-roar-approved.html?queryID=e0df7c14aa1cf962e2b939ea725b97c5&objectID=85637&indexName=hbk_live_magento_en_us_products, https://hobbyking.com/en_us/turnigy-rapid-5500mah-4s2p-140c-hardcase-lipo-battery-pack-w-xt60-connector-roar-approved.html?queryID=966cb393bfebd5f79ec0e2b38147345c&objectID=85640&indexName=hbk_live_magento_en_us_products, https://eu.mouser.com/ProductDetail/KEMET/ALS70A135QT025?qs=AQlKX63v8Runp47hJ6lW9Q%3D%3D, https://shop.gwl.eu/LTO-technology/Cylindrical-Lithium-Titanate-Oxid-Battery-Cell-LTO-2-3V-30AH.html#tab3, https://forum.esk8.news/t/kweld-spot-welder/6926/99, https://www.global.toshiba/ww/products-solutions/battery/scib.html, Turnigy nano-tech 3S/5000mAh/130C Lithium Polymer battery (, Turnigy graphene 3S/6000mAh/65C Lithium Polymer battery (, Extremely rugged MOSFET-based power switch and mechanical current bus design, Power switch internal resistance: 120Ohm, Undervoltage lockout for power switch transistors, Input voltage, output voltage, switch current, and logic supply voltage measurement, Logic supplied directly from main power source - no need for a separate auxiliary power supply, Screw terminal for external trigger switch, Logic supply holdup capacitor during pulse firing, 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, Ability to detect a failed weld, and acoustic feedback to the user, Calibration procedure to cancel out electrode lead losses, Manual mode, triggered from external switch, Automatic mode, accompanied with a warning sound and triggered with an, Audible feedback of weld process completion, Numeric feedback from an executed weld, assisting the user to achieve best results: pulse count, deposited energy amount, required pulse time for this energy, measured current flow, measured ohmic resistance of weld spot.

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