Actually before soldering I think you should first sand the end of the cell,2 clean the end of the cell, 3 apply flux, and then apply a bit of solder on the end of the cell. That way it would take less time for the tin to stick to the cell and you would not get a cold solder
@mihkus
Жыл бұрын
Hydrochloric acid soldering flux....It doesnt need to be warm to touch before it bonds beyond perfection. All these machines but bro doesnt even know how to solder. Only reason why welding is preferred is because it can be fully automated while soldering requires skill and slightly more knowledge Just need to clean the battery pack afterwards or else it will oxidize because the cell casings are made out of cheap nickel plated A3 steel
@slartybartfarst9737
Жыл бұрын
Been soldering 50 years. Batteries in freezer, massive 120W soldering iron (big weight of copper tip) Just before soldering light rub with 800 grit on cell end, wipe isopropol apply liquid/paste flux, always wipe soldering iron on damp cloth then tin then move directly to cell and feed in solder. Thats the fastest way. but you wont beat spot weld. Interesting test....... Run a soldered cell next to a welded cell under thermal camera with high load see which joint has the lowest resistance.
@Bige4u
6 жыл бұрын
For best results when using the soldering iron(40w)... use 200 grit sandpaper to gently rough up the surface of the battery terminals, use at least 91% isopropyl alcohol to thoroughly clean the surfaces, apply a thin coat of paste flux to the battery terminals, then solder, the process should last less then 3sec for maximum affectiveness.
@janneskebogeyman3320
Жыл бұрын
I was also thinking about slightly sanding up the surface
@BrunoPOWEEER
6 жыл бұрын
Yeaaahh... reeeeally good idea showing both methods on thermal camera!!! As a professional battery maker, I normally spot weld everything but when I have to solder (discharge/charge and balancing wires) I quickly use a "freezing spray" to cool the soldered area down, instantly stopping the heat from spreading. I also use some spot welding techniques that makes the final soldering step a lot easier and with a lot less heat transferred to the cells. When soldering, to avoid these big solder blobs, leave the soldering iron on until you see the solder spreading and sticking to the surface. This is when a powerful soldering iron makes a difference transferring the heat a lot faster, making the surface hot enough to melt the solder but fast enough to minimise the heat spreading along and inside the cell. *for those people looking for a cheap but reasonably good and flexible spot welder, I highly recommend the Sunkko 709a or above. There are some DIY Arduino ones but it's more complicated requiring a bit more experience. Enough blablabla... I absolutely LOOOOVED this video mate, well done!!!
@jpjay1584
6 жыл бұрын
hey!!! long time no see!
@AlbUrzua
6 жыл бұрын
POOOOWEEER!!! :D
@Taran72
5 жыл бұрын
Just one question: If I follow this method I would be heating the cell quickly and then cooling quickly. Wouldn't this thermal excursion affect the battery chemistry as well?
@freelectron2029
5 жыл бұрын
wouldnt a "profesional battery maker" know you dont have to solder balance leads because you can just solder to a nickel tab then spot weld that tab on to the battery.
@freelectron2029
5 жыл бұрын
@dbright yep. obviously some kid who thinks he knows what he is doing but has no clue. the real shame is 41 people liked it. thats 41 people that have beeen lied to and dont know it and are now dumber because of this kids BS
@MarkLoves2Fly
4 жыл бұрын
I'm very happy with my Vruzend kit. I'm skilled at soldering, but didn't want to damage the already cheap cells I'm using. They go together easily, and hold securely. For high vibration areas, like my bike, they have screw-together rods, to keep everything snug, and in contact. Definitely worth the price! Thanks for introducing me to this kit!
@krr711
5 жыл бұрын
I have an electrician for many years and am retired now but there is always something new to learn about the power industry. Thanks for sharing!
@JohnClulow
6 жыл бұрын
Excellent experiment ! I'm so glad I found the Vruzend kit before proceeding with my project. Use of liquid rosin flux might promote wetting. It looks like your tip was around 330C / 630F which is actually about 50C/100F lower than I've seen recommended. And 3 seconds would also be at the lower end of contact for videos I've seen. So I think your results are best case. That said, the thermal conductivity of A3 steel would be around 40-50 W/mC versus the stuff inside the cell at probably in the 0.1 W/mC range, So, as you said, the case temperature doesn't tell us exactly how much the temperature of the contents is elevated versus heat dissipation to the surrounding air. (Maybe tabs could be soldered on individual cells using an aluminum or copper heat sink ring around the case near the electrode (with the upper surface insulated) to draw heat out of the case more effectively.) At the anode, however, it is far less clear where the heat is going or what the effects may be. But my take away is clearly that spot welding is preferable to soldering and that Vruzend is preferable to both when geometric considerations in the pack are not a determining factor. Nice work!
@jared1228
Жыл бұрын
After prepping your surface you don't even have to touch the cell with the iron. You use the solder to transfer the heat. To do this you put your iron near the battery and allow the solder to "pool up" between the iron and the battery. This method not only keeps the heat minimal it is also very quick and strong enough to hold together through the extreme vibration and shock that you can expect to endure in EV applications.
@SbangFPV
3 ай бұрын
Thank you. I totally second using the melted solder to touch the plate instead.
@SbangFPV
3 ай бұрын
In addition to all of the above. A wet sponge aftera solder joint also helps resist heat transfer
@garrys3273
6 жыл бұрын
For soldering I developed a habit of using a circular motion while making contact. I think it helps with getting the wet look instead of a bead. This work if you're not using a monster tip like Daniel. Something in between. Thanks for another Great video.
@mindaugasvaskevicius1818
6 жыл бұрын
Try using some sanding paper before soldering to roughfen up the surface of the cell, extra flux and a bigger soldering iron. Much beter results
@DieselRamcharger
4 жыл бұрын
soldering lithium batteries is for fucking morons.
@cekpi7
3 жыл бұрын
@@DieselRamcharger Most of guys working in electronics doesn't have welder unless he works very often with batteries, but almost everyone has proper soldering iron. I've been soldering batteries for few years now and not single one failed. I usually do capacity test of whole pack (i don't do huge packs) and there i 0 degradation to capacity. None of the packs failed so far. So i would say unless you are really bad at soldering, it's not that bad. Welding is obviously much better but it requires huge upfront costs (unless you get one of those cheap welders that won't weld properly and can actually damage battery more than you would with soldering iron).
@madisonscott4677
3 жыл бұрын
If you want to deteriorate your battery then do it
@johncarlobernardo866
3 жыл бұрын
Do you work at spotweld company? May you share your resources to your co tech .(standard)
@mindaugasvaskevicius1818
3 жыл бұрын
Spot welding is better, nobody will argue. But if you do not have access to a spot welder, and you must solder, all I'm saying that some rubbing with sanding paper and some proper flux, makes hell of a difference.
@daniellandberg3264
6 жыл бұрын
I really liked the Video, well done and informative. I'm a motorized bike builder. It should be called engineized because mine run on gasoline. I do make all the lighting and charging components from discarded electronics. I tried to solder some li-ion cells together, but the heat made me nervous. I'm now collecting components to build a spot welder just for the purpose of building multi cell battery packs. I wish I would have had some of the NO solder/weld pieces. What a GREAT idea. I'll have to check into those. Thanks for the video, I know I'll wait until I finish my spot welder. Thanks again, Daniel.
@gwgplate2
6 жыл бұрын
Spot on but what’s the resistance between cell and soldered strip and cell and spot welded strip?
@BlueBluby
6 жыл бұрын
3:50 is where the intro ends
@АндрійКурилас
2 жыл бұрын
What worked for me really well is using ice from fridge to quickly cool batteries down. Also, as was already mentioned here, make sure to prepare the surface using sand paper. I doubt there will be any damage to the battery if following those tips.
@reframeyourbody
6 жыл бұрын
Great video! Thank you so much for your project! would you be able to test if the cell capacity changes after soldering?
@cedriclynch
4 жыл бұрын
It would be interesting to see a thermal camera view of cells connected by each of these three methods when they are discharged at the maximum permissible continuous rate. I did a test with two Samsung 30Q cells discharged at 15 amps, and by the time they were down to 3 volts the soldered cell was about 10 degrees cooler. The soldered cell gave a voltage 0.2 volt higher during the discharge, the reason being that the nickel tabs on the spot-welded cell had so much resistance that they were dropping 0.1 volt each. At 15 amps this is 3 watts of extra heat transmitted into the cell, and 3W x 12 minutes = 0.6 watt-hours of the cell's approx 10 watt-hours (that is 6% of its capacity) not delivered to the load. At lower currents the difference will not be as large; at higher currents that some cells can give, the difference will be larger. I agree with the comments below about sandpapering the cell before soldering: the solder wets the surface much faster if you do. You can get solder made of 62% tin, 36% lead and 2% silver, that melts at 177 degrees C instead of 183 degrees for 60/40 solder.
@mattmorin8004
6 жыл бұрын
Can you do a re test by first testing the capacities before and after the soldering vs spot welding to compare the capacity loss? Also hit the solder cells with a Dremel tool, use flux, also a temp controlled soldering iron (Hako or equivalent) will reduce the time necessary for a good joint. Great videos Thanks
@bjorn1583
5 жыл бұрын
with the cost of a decent soldering iron you can buy a spot welder, even better make your own spot welder out of a car battery
@Tuber360904
5 жыл бұрын
@@bjorn1583 not true. the blue $8 soldering irons on amazon work just fine, but i agree with the second part.
@JRScience
6 жыл бұрын
I wonder if the heat observed traveling "into" the cell was heat traveling along the exterior metal case of the cell? Especially when you consider how quickly the heat dissipates.
@njfulwider5
5 жыл бұрын
I like to keep my soldering iron at around 420c. I also make it a point to use thin solder wire. That makes it easier to control. Typically i aim for 3 seconds, but it normally solders in 2. Keeping the heat this high helps with the heat distribution on the battery. Great Video and one of my all time favorites!!!
@rafaelrivera9807
6 жыл бұрын
I suggest using flux paste also to reduce the contact time while soldering or sanding the battery surface first
@notamouse5630
5 жыл бұрын
Cool that you did this scientifically. For soldering, the proper way to do this is roughen the surface with fine sandpaper, lots of solder paste using an SMD stencil with a large ground pad rather than wire solder, preheat the bus wire, 1 second or less heat time on very high followed by spraying with isopropyl alcohol to cool and remove flux residue.
@charlesbarker8424
2 жыл бұрын
WoW great advice
@stvrob6320
6 жыл бұрын
Do you think a bit of scuffing and a small amount of rosin flux would allow the solder joint to be done quicker?
@InssiAjaton
6 жыл бұрын
I recall a presentation by Mr Carlson’s Lab, where he demonstrates some good practices of soldering connections. The things I remember are all for shortening the heating time. Start with cleaning the ends of the battery, use some fairly aggressive flux and a high temperature iron tip to prepare the pre-solder. Immediately after cool the cell end with a wet sponge or rag. The heat time can be down to barely more than 1 second. He used wires rather than ribbon in the next step, ends pre-soldered and again the heat time was just about 1 second. With a quick wet sponge coolin the total heat exposure was maybe 4 seconds. I am all in favor of spot welding, but must recognize that the soldering can be acceptable, when done properly.
@gyrotumbler8584
6 жыл бұрын
Mr Carlson's Lab, Best electronics teacher on KZitem
@DieselRamcharger
4 жыл бұрын
you can not solder a lipo safely. period.
@BenBrown-ds1lt
Жыл бұрын
Would using tin-bismuth solder work better as its melting point is 138C'. My concern is that in my application of an e-bike running at 50V and 20amps so 1kW this may be dangerously close and may start to effect the mechanical properties of the solder.
@josephoshagbemi2507
Жыл бұрын
It really true that most DIY lithium ion battery makers use soldering systems because of costs of the spot welders and there are heating damages to the batteries in one way or the other. The cheaper hand spot welders are of not much use as the nickel strips peel off as soon as the welding are done thereby leading to repeated spot welding of the same batteries with defaced ends.I have tried both on a number of occasions and end up unable to determine which method is more effective ! I think the spot welding companies, if they are watching, should find a better means of producing highly effective and yet cheap enough portable hand spot welders for the international markets.Reflective metals generally interfare with infrared camera ability to monitor and detect heat radiations but all the same, your teaching/demonstration is very good in reiterating the importance of not imparting too much of heat into the lithium ion batteries if damages and accidents are to be avoided in the future. Once again, thank you Micah…..(Joseph Oshagbemi ).
@termite2691
3 жыл бұрын
The components inside never got above 70C even though the camera showed 200C for the solder blob sat on the outside of the case. You know this by how quickly the surface temperature dropped, back below 50C in 5 seconds. 70C would have no affect on the reliability or capacity of the cells. And if this guy had done it properly, sand, flux, powerful iron turned to max, it would have taken less than a second to get a perfect patch of solder limiting internal temperatures more. Yes a welder is better than solder but if you're only doing a few cells occasionally it's a total waste of money.
@mrgcav
3 жыл бұрын
Great video As an Electrical engineer, I do not recommend soldering batteries. What I would like to see is a comparison of resistance in milli-ohms of each method of connection and the voltage drop on the same size battery packs. Can you weld copper bus bars ?
@explod329
Жыл бұрын
Since you claim to be an electrical engineer why do recommend not soldering? Are you saying this from reading comment? Rumors? Personal experience? The reason I ask is I have been soldering on these cells for years. I have done extreme testing with welding vs soldering and I cant seem to create any damage to the IR. I have not seen any capacity difference or long time effect. Please explain why you do NOT recommend.
@ThailandAmazing
6 жыл бұрын
Thanks I had gone to a few sites. Using the camera to see heat transferring into the cell convinced me to do spot weld. I already bought your book on amazon. On the batterys. But not the bike one.
@stevepetker6299
4 жыл бұрын
I liked you video and the idea behind it. While watching a though came into my mind. I understand with whatever method of cell to cell attachment is used effort should be make to not expose the cells to too much heat and heat retention. I was wondering if you in a controlled slow manner dropped the temperature of the cells down around 60 or 50 degrees Fahrenheit would the attachment still achieve the same strength bond while not subjecting the lithium cell to a high a temperature. I do not know if starting with a lower temperature cell would cause any difficulties with the internal chemistry. Have you ever heard of anyone doing this type of starting temperature experiment link you did in this video. Would you consider doing a follow up experiment with this idea? This was great I really appreciated how you went back in post production and added the high temps.
@tbbw
6 жыл бұрын
Seems he should add some flux ontop of the cell first it tends to help getting the solder to bond with the cells when i do it even doh my solder got flux inside of it.
@mikeguitar9769
6 жыл бұрын
Even a corrosion resistant metal grows an oxide layer over time, so I figure it's better to sand that off first with a hard abrasive, then add flux, etc.
@rdkuless
6 жыл бұрын
I am addicted to watching your videos. Thanks for the information. I'm also working on a "solar" ebike charger. it is more complicated than i anticipated and the "locals" really don't know anything about MPPT Boost/Charge controllers to make it happen.. Then they wonder why I shop outside the USA.. (little sarcasm)
@MaximusPanin
Жыл бұрын
It was informative and visual! Thanks!
@imaphxaznative
Жыл бұрын
There seems to be lots of different spot welders. The spot welder @ hft has top & bottom tips that meet @ the working material up to 3/16" thick
@betterthannotgoodmtb
Жыл бұрын
Thank you for this insightful video.
@trei2unu
6 жыл бұрын
Ok it heats up but what are the consequences? Does the capacity of the cell decrease? Could you do a before and after capacity test to see what's the difference ?
@garolittle
6 жыл бұрын
I highly recommend His DYI Lithium Battery book. It is very informative.
@Ra-zor
5 жыл бұрын
LOL you solder these cells in 1 second using acid flux and a 80w iron... Done hundreds of them perfectly.
@rickc2222
4 жыл бұрын
This....
@pseudonymity0000
5 жыл бұрын
I use flux paste directly on the solder site and also scrape the surface where the solder is to meet. A big tip is not necessary, as the main thing is to have a high temp (400 C) to start the wetting quick. once wetting starts it carries along quite easily. I personally prefer a needle tip, as you can get a small area to start wetting within 1 second with ease and then use the broad side of the needle tip to quickly spread it out while feeding solder to the join. But the main point here is the flux paste and high temp really makes a big difference, as It can cut multiple seconds off the time it takes to wet the surface, even if you have flux core. In the wise words of Louis Rossmann, the bigger the gob, the better the job.
@tatadune537
3 жыл бұрын
It Helps when you explain how you did it. Thanks
@km4hr
2 жыл бұрын
Is spot welding safe for your eyes? Do you look at it directly? Ordinary arc welding requires a full face shield for safety. Isn't this the same principle, just on a smaller scale?
@vmoutsop
6 жыл бұрын
Great test, huge difference between both tests
@wizzardofwizzards
6 жыл бұрын
I agree with the other comments to clean the battery tips with a low grit sandpaper, or steel wool, and the nickel strip and to use a flux for the solder approach. The solderless caps seem novel so I am going to put a like on this vid. Good job!
@ApostolicCherub
6 жыл бұрын
Hi, I like you video for many reasons. You video is the only one, so far that I've seen, that actually illustrates what is happening to the battery cell, and how far heat penetrates. I also like the video overlay you do with the thermal video. My question is: What video software are you using to produce this video? I love how you overlaid the thermal video and then enlarged. Thanks!
@davidcrane275
6 жыл бұрын
My dad had a spot welder: I'll have to see if I can find it. Great video, loved it.
@advancednutritioninc908
4 жыл бұрын
If you are going to weld batteries make sure it's the kind of spot welder where both tips can come from the same direction - some of the sheet metal spot welders come from top and bottom of the weld not like what you see him doing! If you use a sheet metal spot welder (top/bottom) you can easily BLOW UP and 18650 or any small battery for that matter. because the welding current is induced through the battery to make the weld which will destroy the cell and probably rupture it. just a word of caution! :)
@Michel-Artois
Жыл бұрын
Hi, very late for a comment about your very interesting video! 👍👍 I agree , spot-welding is the best for all common uses ...except for high amps drain (motorcycle etc...). In this case bus-bars are the best but not always possible, so I use copper wire and solder with minimum 80/100w iron for a shortest soldering time : maximal contact , and it's the best solution to drain 100A or more in a few seconds. Be simply sure that all weldings have the same quality to avoid hot points and quick issues on the cells. For the beginners : don't do that if you don't know amps issues.
@TeeeTooo2008
6 жыл бұрын
hi maiky. will you please give us an idea about the mid drive kit? and maybe comparison with hub motors from your point of view.. i would really appreciated..
@OregonDARRYL
3 жыл бұрын
Flux will help a lot. A little smear of flux will flow the solder like butter...
@dbc105
6 жыл бұрын
Good to see those temps. I am using a 4s2p on my Vintage Racing Motorcycle to power the ignition and I wanted to make a couple more batteries to have on hand at the track.
@MySocialExperiments
4 жыл бұрын
Excellent. Thank you.
@paulkennett
6 жыл бұрын
Great to see this comparison. Would you be willing to do one more test? I use recycled laptop cells that I keep in their pairs. So I'm only applying heat to the nickel strip between the pairs. I'd love to see how much effect that has on the amount of heat transferred compared to the two methods you tested here. Within the DIY Powerwall community (not your core audience I understand) we're wanting to attach "Tesla style" fuses to each cell. Are you able to do that with your spot welder? And lastly - soldering is a skill that takes a while to get good at. Watching you solder was a wee bit like watching Jehu test the Vruzend system without any practice. :/
@MrGeri95
3 жыл бұрын
I think it's way more better with an oldschool soldering Gun than a soldering iron! Sanding is neccesary for soldering!
@janbostik
6 жыл бұрын
Try out how much does it actually take to toast the battery :)
@willielump832
3 жыл бұрын
100 degrees is danger zone .
@HandyC
6 жыл бұрын
Now lets see the heat localisation on high amp discharge with all three different methods of connection.......
@kameleont.6509
5 жыл бұрын
I was wondering if adding a small computer fan would help the battery stay cool or is it not necessary
@HillsWorkbench
6 жыл бұрын
Wondering about the current capacity of tabbed cells with a single pair of welds, or even two pairs? The conductivity of soldered VS welded? With the FLIR, would be interested to see if a tab welded with a single pair of welds would heat up under a heavy current draw.
@EbikeSchool
6 жыл бұрын
I already started doing some similar tests and will be posting the results soon.
@brenthawkins204
6 жыл бұрын
EbikeSchool.com
@bjorn1583
5 жыл бұрын
companies have been spot welding batteries for decades without issue so it cant be a problem or they wouldnt do it
@draventannoy
6 жыл бұрын
Could you do a video about the discarge temp of the most used cells (Samsung 30Q, 25R, Sanyo GA, etc)? Would love to see how these compare!
@EbikeSchool
6 жыл бұрын
Yea that would be interesting. I'll try to do some tests. Thanks for the tip!
@adama1294
6 жыл бұрын
I can see why you don't like soldering the batteries. I also know several methods to make soldering better and faster. Sand the top, apply solder to the iron, not the battery, add additional flux. Also there is a soldering wire that is Sn/Bi that melts at 140C rather than the 183C of leaded solder. A soldering tip at 160 will let a lot less heat into the cell than 200 of Sn/Pb. I have also seen fuse wire being welded to batteries. Combined with copper buss bars, I think you can get the safety of the fuses and the lower resistance of copper to increase the efficiency of your system. Plus its going to be easier than welding strip over strip of nickel wire. Is there going to be a follow up on the capacity / cycle life of both welded and soldered batteries in reference to your mechanical solution? Just finished reading your book, it is a good general overview of what all that you need to build battery banks.
@John_Smith__
5 жыл бұрын
Combat engineer also has a good video about soldering the Cells with Solder iron. But you also need to place Flux on top of the cells surface for a good clean solder. And of course use Low Temp solder tin-lead like you did. That solder melts at about 180C-190C. No need to place the Solder iron at 300. Nice video.
@BobboNaught-YT
11 ай бұрын
Seeing the heat travel down so fast definitely convinced me to spot weld.
@johnpossum556
6 жыл бұрын
5:40 the word you are looking for is filet. A proper solder joint has a clearly observable filet. From some one who took Avionics Soldering at a college that specializes in it.
@johnpossum556
6 жыл бұрын
PS 63/37 rosin core solder will work better and a dab of flux prior will give better results. Love this idea for a vid as I haven't seen it on YT yet.
@sarinsarin7898
Жыл бұрын
Try using a straw to blow cool air onto the battery whilst soldering, preferably in a cool environment. And as others have mentioned, prep the area first with fine grit sandpaper then flux.
@hoyvintagecycles2936
Жыл бұрын
I think its proven that soldering doesnt really hurt the cell if you do high heat for 4 or less seconds. My question would be how the voltage transfer is different between a spot welld and a solder joint. seems like the solder would be better. SPot welds seem to break off more often?
@frankpitochelli6786
3 ай бұрын
If you sanded the battery with some emery paper then used some good flux, the solder would definitely adhere much better and quicker. But, spot welding is definitely the choice when connecting 18650's or any battery.
@thisgeneralmillennial100
6 жыл бұрын
Is it possible that because there wasn't flux and that the cells were not sanded that it didn't well better?
@nattyphysicist
Жыл бұрын
A thermal sink while soldering might be a good idea. Ie, make contact with the surface near the solder point with a fairly massive piece of metal.
@njfulwider5
6 жыл бұрын
Great Video, But A 100-watt soldering iron from what I can tell is better than the 50-75w when soldering cells(bigger tip and more heat). I have built a few battery tab welders with an MOT. Would be interesting to see how hot those get. Just curious, not sure if i missed it in the video, what you had the soldering set at? Also what settings you had the tab welder set at? I had no clue the differences in the heat, great to see you guys do a video on it! Very educational!👍👍👍 Edit-Just seen the iron at 330C with the thermal camera.
@bobmuir5811
6 жыл бұрын
Cool. I wonder how much a cheap spot welder is here in the UK.
@BrunoPOWEEER
6 жыл бұрын
bob muir don't go for the cheapest models, get the Sunkko 709a or superior =]
@metalmogul4691
3 жыл бұрын
Sorry, have tried to use both methods, solder and spot welding. The soldered batteries don’t show immediate damage but after repeated usage then do not seem to last very long. Only difference between the two methods of joining is heat. The heat does indeed cause battery damage. The spot welded batteries last far longer because the spot weld does not transfer very much heat into the battery. Over time concentrated heat joints just kill 18650 Li-ion batteries. Case closed.
@RickRowen
5 жыл бұрын
I have both books and they are excellent! This is an informative video, thank you!
@MrGiodude17
4 жыл бұрын
Hi I have a question I have a battery and the cells look fine no sign of damage it’s a brand new pack only 3months only however I left my battery pack out in my in door garden with the humidifier right now to it and when I open up a few nickel strips where the balance cable connect just snapped off but the other is in place
@MrGiodude17
4 жыл бұрын
Is that why is does turn on if a few balance leads are disconnected
@gopikrishnaswargam
6 жыл бұрын
Nice experiments that convey a lot more than some random statements like spot welding is good!
@praveenkumarkatukojwala2075
6 жыл бұрын
Excellent comparison....
@Taran72
5 жыл бұрын
Thank you very much for doing this! I was wondering myself: I have read and watched different videos on this and the best way to see the truth is to experiment! :)
@denislostinlondon199
6 жыл бұрын
My favourite tool for cleaning a surface prior to soldering is a fibreglass pencil. Be careful of the resulting dust, it can be an irritant.
@sagit0007
6 жыл бұрын
Nice video.
@ntulsian
5 жыл бұрын
What about pre-cooling the cells in a fridge for a couple of hours before soldering ? That way the core of the battery will be cooled to about a temp of 40F, preventing the core from rising above normal even with the excess soldering heat.
@stanleymichelim4326
5 жыл бұрын
Neeraj नीरज Tulsian तुलसियान nono no. Bad idea. You will create high temperature differe ce that leads to sudden expansion that increase the risk of explosion, or just triggered one.
@MrSummitville
4 жыл бұрын
@@stanleymichelim4326 Has an explosion actually happened to you? I doubt it. We already have a very high temperature differential ! Chilling the cell does not increase the temperate differential very much, but does COOL the cell.
@BrunoBostick
5 жыл бұрын
nice video, and nice thermal camera
@aae42
6 жыл бұрын
very interesting, i was sort of trying to decide if i could get away with not having a spot welder... maybe reviews of spot welders would be helpful? i see them on amazon for ~150
@syedsajidshoaib9125
4 жыл бұрын
Hi brother Can I give 70v DC power supply to 60v EV controller and 60v BLDC motor
@weleshboatian5159
6 жыл бұрын
Very interesting videos, yes I keep watching and learning. I sure your Book will make me learn a lot more.
@schuylergood4897
6 жыл бұрын
I'm currently trying to make a 10s2p battery pack for my electric skateboard and I was thinking about using Samsung 25r 18650 battery cells but their really expensive to buy (I can't find anyone selling them in packs of 20) so I was wondering if there was a better type of battery cell that's cheaper but still with a decent voltage and amperage Thanks in advance! :)
@ecospider5
6 жыл бұрын
If you search eBay for "10 lg 36v 4.4ah" you will find pre built packs that size. I got a bunch of them and made 13s 10p packs but you might be able to use them unaltered.
@timh2870
6 жыл бұрын
the trouble soldering seems to be a samsung thing. most other cells solder just fine in under 3 seconds. i find that i have to scratch the plating off and use a drop of flux on samsung cells.
@DamianRene
6 жыл бұрын
Great and clear visual battery experiment! As we talk in the sphere there is no doubt that spot welding is one of the best welding method , just don't completely discard iron soldering 18650 cells. The chemistry harming when permanent loss of capacity is involved depends of an equation between temperature and time. So even if the cell surface shows >200°C, the greater inner cell volume reaches much less temperature and during a insignificant duration. When the soldering involves a very high temperature and a very short time (a little more powerful iron and slightly greater tip mass), the harming will be negligible. The thermal imagine image makes it looks very dramatic indeed!, but total volume reaching high temperature is less than it looks. If I have the time I will make a energy test comparison between a spot welded battery vs iron soldering battery with the similar standard iron, 18650 science! :D
@ingmarm8858
6 жыл бұрын
According to one of the gentleman whose name appears on the patent you should not under any circumstances solder these cells.... straight from the horses mouth outranks anyone else's opinion as far as I'm concerned, he convinced me very quickly!
@DamianRene
6 жыл бұрын
I'm agree, is not a professional way to do it. The most vulnerable elements are both current interrupt device and positive temperature coeficient membrane near the anode lead, both are vulnerable to rise the cell IR permanently under high temperatures, but those are luckily enough separated to the anode disc, making soldering the anode relatively safe. For other considerations, 18650 cells are elements designed to work on high temperatures, if you know how to solder them, using high quality cells, the consideration could be not more than a slightly loss of capacity. I never solder cells, and I think is the worst way to connect them (not worse than contact systems) but I couldn't deny is a way to do it if you know what are you doing
@kumprakos
6 жыл бұрын
Damian Rene
@johnmccarthy1010
6 жыл бұрын
Hi, would be good to see how hot it gets using the smaller soldering iron. Also, when you show the thermal image and it get's hot, how do you correlate that to potential damage. The heat may only be locally affecting the battery but may not hurt the perfomance later. Would be good to show some performance check.
@zaenalabidin1492
2 жыл бұрын
We must know what is inside the battery cells (solid, liquid, chemistry, etc.) and think about their reaction when being heated on that temp. Personally, I believe applying that heat will shorten the lifetime of the battery cells, PCMIIW. Maybe that's one of the reasons the manufacturers using spot welding instead of soldering?
@melvinbelcher7606
3 жыл бұрын
After watching your video, money is the only thing that is holding me back
@jamest.5001
6 жыл бұрын
I could maybe use a book. for some ideas. they are many ways to build packs. I'd like to see how it is recommend they be built.
@vanhulagen
5 жыл бұрын
id like to see this were you put the solder on the end of the iron and thin put it on the battery
@Scootersnmore
4 жыл бұрын
Cool video thx for sharing . I thinking Flux would of helped you think ? maybe light scuffing of the cell metal that is to be tinned? Love the spot welding machine what metal strip was that you spot welded with ? Thx
@cmj20002
6 жыл бұрын
It is really hard to solder to the negative terminal, due to the size of it and it spreads the heat out the length of the terminal and that goes the length of the battery. I had too many break off and I had to open the pack up to fix it. Once I purchased a spot welder I have never had an issue again. Spot welding is the way to go.
@adventureswithsteve2981
5 жыл бұрын
Prep Cell contacts first , sand terminals and add flux to them and also flux your solder tip
@peace5655
4 ай бұрын
Good demo!
@sreekumarUSA
6 жыл бұрын
Very informative and educational video. Thank you. Please let me know from where you bought battery polarity stickers, which is seen on your previous videos. I would really appreciate your response, on this enquiry. Thanks in advance.
@merlinthompson3509
6 жыл бұрын
What are the circuit requirements for powering the spot welder? Can you use that in a home workshop?
@mikelemon5109
6 жыл бұрын
When soldering those kind of thing you want a soldering iron of atleas 100W and apply some flux paste on where you want to solder sins chrome or what there those terminal are made out of don't like solder sticking to it very well. BTW what thermal camera is it and where did you buy it from?
@neutronpcxt372
6 жыл бұрын
Probably a Flir camera. You can get one for your smartphone for 250-300$.
@mikelemon5109
6 жыл бұрын
NeutronPCXT doesnt look like the smartphone flir and the next step would also look bad and cost around 2000$ but this one looks good enough for what I need so I was just wondering
@webslinger2011
6 жыл бұрын
Flux paste helps dissapate heat. But I wait till it cools down before I do solder on it again.
@informing_
3 жыл бұрын
The red mini spot welder is BEST, it's just 20$ and you can use it with any car or solar battery!
@fpv4metoo693
6 жыл бұрын
Thanks Micah for another fantastic video. Have you ever shown your ebike? I’d certainly like to see what the bike of someone who sells books on the subject ... Not that you NEED validation , curious.
@Samuel-km5yf
6 жыл бұрын
Awesome video! Is it too late to win that DIY battery book??? I’ve recently become fascinated by Li-Ion batteries and would absolutely love that book!
@RelentlessHomesteading
5 жыл бұрын
Yes that was a good demo - and making your own eBike is a great project. I'd still prefer my www.flx.bike though. I'm using the cell welding for a different project - Thanks for the video.
@alexsiniov
6 жыл бұрын
Have u tried flux paste? It makes solder stick and spread much faster
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