DIY Rapid Build 18650 PowerWall Module project - design & testing
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6 жыл бұрынBuy PCB kits here j35.us/10xPCBkit
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8) Why not use Supercapacitors?
A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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@zachhoy 3 жыл бұрын
I respect how transparent you are in your findings! Even though you sell products, I feel that you are truly a battery enthusiast first.
@mountainman4410 6 жыл бұрын
You give hope to people like myself who just don't have the time or energy to deal with all the complications of building these walls! I can't wait to see these ready for sale!
@wesKEVQJ 2 жыл бұрын
After trying to spot weld 8 packs with 65 batteries each, I am so ready to spend money on traditional battery holders and blank pc boards to solder the holders to. Etching is easy. All the boards are the same you can use a stencil and a marker. Your boards are probably cheaper or the same as making your own so heck yeah. Your accent brings back good memories from the Navy.
@billz4071 Жыл бұрын
Good testing. There is a problem when you use mechanical connections to the batteries. The resistance between the battery and the terminal will go up when you pull more power. Also, the terminals from the battery clip to the circuit board should be more robust. This is where you need "Hard Connected" cells from the batteries to the outputs. Spot welded connections and larger wiring is needed. Regarding the resistor lead for the fuse, it isn't going blow for any reason. That little wire can easily source 10 or more amps through it. Been that route myself already. Battery technology is scary what these cells can produce in power, while balancing the overheating before a massive outbreak of a fire in present. Remember also, water cannot put out a Lithium-Ion fire. All these electric vehicles are subject to MASSIVE destruction when these cells short or catch on fire for other reasons. Great explanations and testing procedures on your behalf for everyone.
@unlost117 6 жыл бұрын
I like the "no bullshit" approach you do explaining the good and the bad in your videos man. Great to see honesty and facts. Keep up the good work.
@tony_25or6to4 6 жыл бұрын
The sound and visual of Jehu sliding the board across the table is driving me nuts. :-)
@kcocgibkcusuoy 6 жыл бұрын
Tony P "So, we have this board here..." *Bats board, bare trace side down, around table like a cat* Whhhyyyyyyy?? 😱😭
@dorhocyn3 6 жыл бұрын
That sound made me very uncomfortable also
@lenawebb-bey3642 5 жыл бұрын
Tony P you are sooooo right. Nails on a chalkboard!! 😂
@markjennings2315 5 жыл бұрын
Theres a lot of us sound aspergers about LOL
@Tony_P 5 жыл бұрын
Triggered me too. Must be a Tony P thing !
@johnneilbibera2227 6 жыл бұрын
This is nice. adding heat shrink tube to the long bolt to make it safer, great stuff!
@jameswyatt1304 5 жыл бұрын
Exactly what I was thinking - simple HST. Also on the balancing pins, but can just one larger tube, rather than individual. The bolts remind me of the buss bars in power supplies for telecom gear, large computers, and such.
@AnthonyPiedra 6 жыл бұрын
I"'m binge watching your videos. I admire your hard work. This is truly an inspirational set of videos -- and you're taking DIY to the next level! Props!
@mick-sk5lw 6 жыл бұрын
that holder is made out of ABS and has a safe working temp upto 80C. i just tested one that i have using my soldering iron and at 100C after leaving the iron on for 5 minutes there were no visible marks. at 110C there was a slight indent that was hard to see but you could feel it when sliding the iron over it. at 120 it was almost instantly indenting.
@JeffKreska 6 жыл бұрын
This has some serious potential. I would love to build a powerwall but I don't have the time to put into it using previous solutions but this, I would do in a heartbeat.
@guillermomarturetfendt9037 6 жыл бұрын
Do not build this!! The system doesnt charge uniformly all batteries! I will fail and explode with time. Trust me, Im an engenieer
@cottsak 6 жыл бұрын
Love where this is going. Might be the solution which gets me into my first DIY 18650 powerwall. Keep it up.
@phizicks 6 жыл бұрын
Thanks Justin on a great idea and product, awesome design skills too. Putting many of these in parallel, it can spread the load easily to 1C.
@RANDOG1951 6 жыл бұрын
Thanks again Oby Juan Canoby - Garcia :>). I'm running 400 watts newly installed on my 1984 Chevy Van G20. Going to increase to 800 watts. Going boondocking in my elderly years. Thanks for your contributions to humanity. Good Job Maynard. Ola
@wanderingbox7971 6 жыл бұрын
RANDOG1951 awesomeness
@DiyintheGhetto 6 жыл бұрын
They might not be able to handle the current like that But for other projects like led flashlights, small power packs for charging stuff abd and whatnot. Its a great idea. Thank you for the share.
@neutronpcxt372 6 жыл бұрын
Yeah. These thin steel strips can't carry a lot of current at all. I would not recommend them for big high powerwall operation.
@mr.e-toy6776 6 жыл бұрын
NeutronPCXT The thin pins are for balancing....the main power goes through the posts on the corners
@gregorythomas333 6 жыл бұрын
I think Neutron was talking about the pins on the battery holders being too small for the current load.
@JoeMalovich 6 жыл бұрын
NeutronPCXT if like to see a comparison between these and a soldered or spot welded setup thermal-wise. I have a suspicion they were conducting heat out of the cell. It doesn't make any sense that they would get hot and the tiny fuse wire wouldn't.
@DiyintheGhetto 6 жыл бұрын
I think because of the metal it's acting like a heat sink for the battery. More wider the metal strip it the more it looks like it's expanding. And i think with the fuse wire. Being a Thin piece of wire. Maybe I'm wrong I have no clue Just a guess maybe.
@dantyler6907 2 жыл бұрын
Maybe add microfans for each panel, blowing ACROSS the board. Also, a bit larger fan (same used in other electronic supplies). Finally, venting on the top and bottom of the panel enclosures. Should accommodate lots more heat than massive numbers of these boards can produce. Fans can go a loooooong way!
@joshuabell6835 6 жыл бұрын
Awesome work. Really exciting stuff. Thanks for all you do.
@Spartan2x 6 жыл бұрын
I would love to have a large power wall with theses all spread out so that you can easily just pop any of the cells out. Even if it takes up a entire wall- it would be sweet.
@PetreAdrian 6 жыл бұрын
some individual fuses would be great - like the one for the entire "module" cause with current design if you burn one "track" thats it. this can make them "reusable". But amazing design maybe you can also make them "double layered"so you can position the holders on both side so one board can run 2P config . just need to make on side a little "offset" than the other, do one side and after the other one - price per cell would go lower on assembly. Still great jooob!
@demolitionwilliams7419 3 жыл бұрын
Two years later I'm just now reading this.... Fantastic ideas
@FullSendPrecision 6 жыл бұрын
Brilliant. Looking forward to the rest!
@haulngrassracing 6 жыл бұрын
Epic! Love seeing all the 18650 holder idea's on here and your Facebook group. Kudos Mr. Garcia
@andrewness2153 6 жыл бұрын
Love the video! But I still prefer the Tesla-style battery packs. After all, they both require soldering anyways. Sometime the old methods are the best. Probably easier for people that aren't as keen into batteries and soldering and what not, but I don't think having someone build a large battery out of 18650s is the best idea for those types of people anyways. In my opinion, a good idea for applications where batteries may go bad often, but those applications are usually high amperage and these battery sleds don't seem up to that task. Keep em coming!!
@FilAmGabe 6 жыл бұрын
This is really great Jehu! You have have done a very good thing for the DIY community. I am am excited to give this a try. What do you think the largest you think this can be scaled to? Thank you everyone involved with this project.
@tonysshadow 5 жыл бұрын
REALLY appreciate your trials. All the discussion and chit chat in forums from arm chair experts means diddly squat ....till someone like you dives into the deep end of the pool. Thanks again
@linoge71206 5 жыл бұрын
Watched the mother board thing on you man . Came, watched a few videos, and I love what you do and how you show people how to do it with schematics
@Retinalism 5 жыл бұрын
The quick appearance of high temps at the ends of the batteries is due to the (potentially) poor connectivity of a spring contact arrangement. While it would appear that there's adequate surface area on the battery end and the frame spring contact, nothing could be further from the truth. Moreover, once the spring contacts do heat up they'll warp out of shape, compromising the contact area even more. There is no substitute for properly attached (welded or soldered) wiring when your current profile on each cell is likely to be 2 amps or more. Also, once enough heat is generated in those spring contacts their elasticity will also deteriorate with time. These types of "quick connect" frames are best suited to test equipment applications, but even then, longer duration current flow could still create heat and connectivity issues. There is no substitute for doing this shit properly, especially with these pocket bombs called Li-ion batteries.
@funposting8912 5 жыл бұрын
Came to post this. I wonder what the energy losses from these things are at day one, let alone day 100
@cryptonein 5 жыл бұрын
@@funposting8912 So what's the real solution to this?
@alexandervanbrocklin9230 5 жыл бұрын
Scrolled down to post exactly this, I am frightened by these practices.
@odriew5014 5 жыл бұрын
Use some steel wool for a better connection. Better yet use copper wool although it's much more expensive. Just be careful to keep the wool in the right place so it doesn't short anything.
@ngrader 5 жыл бұрын
@ztechlabs Just make sure it's '00' steel wool, for maximum destruction.
@garystinten9339 6 жыл бұрын
A cooling system integrated into the racks would be nice also. Future revision for customization. The futures looking bright
@studiowebselect 6 жыл бұрын
Not ratted for more than 1c so dont need cooling. Its design for power wall not ebike!
@MarkLLawrence 6 жыл бұрын
It wouldn't be too hard to add a simple pc fan 3 or four pin port on that board, then it could cool itself using minimal power.
@boombeachnoob3642 6 жыл бұрын
Gary Stinten power wall module Yay
@jmonsted 6 жыл бұрын
Stick 'em in a rack (or whatever other cabinet) and put a cheap car radiator fan at the top pulling out hot air.
@joshbanks5267 6 жыл бұрын
Another great build, thanks for sharing!
@yeshecan7 3 жыл бұрын
I love your job Jehu...thanks a lot. You learned me to build battery pack simply.
@AveRage_Joe 6 жыл бұрын
Cool Idea!
@alienpoker 5 жыл бұрын
AveRage Joe More like a hot idea. Not optimal design. Too much loss at the clips, spot welds are the only decent solution long term. Look at how battery packs for powertools are built. Much fewer cells, yet they spot weld to avoid losses and excess heat. .
@humanrightsadvocate 6 жыл бұрын
This is a guy you definitely want on your team in a zombie apocalypse.
@CerebralDad 6 жыл бұрын
I'd like to see more of this project - dont give up.
@BriannaFleury 6 жыл бұрын
Nice job, love the modules.
@TheWorcesters 6 жыл бұрын
Interesting and interested. I'll be watching how this goes for you.
@whatthefunction9140 6 жыл бұрын
this seems very practical and easy to use... its bound to fail
@guillermomarturetfendt9037 6 жыл бұрын
The system doesnt charge uniformly all batteries. I will fail and explode with time.
@herbert633 6 жыл бұрын
which is why you use a battery management system which all the 8 pin leads are for, to balance the batteries. this is diy battery packs 101
@guillermomarturetfendt9037 5 жыл бұрын
Herbert 8 pins yeah... But... For how many batteries? That's the thing, it charges 4 batteries with the same cable. Think a little deeper next time.
@johnfitbyfaithnet 4 жыл бұрын
Thank you for sharing this important information listening from Brownwood Texas
@redandgoldfan3869 2 жыл бұрын
this guy's a battery genius, thanks for sharing!
4 жыл бұрын
I nearly jumped out of my skin when I heard that display power on XD "Nokia? Is that you?" XD
@823Labs 6 жыл бұрын
Looking forward to v2 I'll definitely be interested. As always great vid and great concept.
@ProGunNL 6 жыл бұрын
Nice concept! Really liking this idea!
@DailyWalk365 5 жыл бұрын
Just my 2¢, I would consider finding a battery holder that provides more contact with the battery. Typically I see when inserting batteries in holders that the spring clips are rounded slightly as is the battery terminal. What happens when you put two round things to each other, the contact area is greatly reduced. It's like driving current thru a small wire. It will get hot. You might have to solder or weld the tabs on the batteries for better current handling. Loved the video. I like the way you think out a project and not afraid to ask for help. Smart man!
@dejayrezme8617 6 жыл бұрын
122°F = 50°C 90°F = 32°C Thanks for the video! It's interesting to see that it's actually the connectors heating up, not the cells. PS: Or with a different camera angle it's mostly the connectors... So for a serious power wall you really do need to solder. For smaller applications like for a solar powered shed or van for LED lights and ventilation this would be just great. Of course heating up is wasted energy so you really want to avoid it if energy is scarce.
@jehugarcia 6 жыл бұрын
Powerwalls never need to be discharged in 1 hour or less
@dejayrezme8617 6 жыл бұрын
Hmm I wonder if you could use the 18650 holder springs as a fuse wire at the same time? Silly idea of course, but if you'd have these springs using some piano wire.
@timberthewolf733 6 жыл бұрын
Awesome! ABS melts at 105+*C so 3d printable plastic battery holders might be viable?
@christiankulmann3325 5 жыл бұрын
Soldering is the best solution... Thank you for your videos.
@karlbartelt3939 6 жыл бұрын
Wow, great work and honest test and review of this new product.
@piripepeno 6 жыл бұрын
bro, fuses are important xD
@jorgechavez9297 4 жыл бұрын
Just seeing this now lol
@TravisWatson 6 жыл бұрын
Wow Justin's got some PCB design chops eh?!
@actstorm 6 жыл бұрын
This will be amazing to see released :)
@The.2.Minute-Man 5 жыл бұрын
Hi Mate from Aussie ... Great vid .. I'm new to the DIY 18650 build's... learning new things every day Thanks
@me4tgr1ndr 5 жыл бұрын
My favorite part was when he skipped the fuses and burned his house down
@p_mouse8676 6 жыл бұрын
Use tooth washers to have much better contact (less resistance).
@helamananders9377 5 жыл бұрын
Thanks for your videos, I am learning a lot from them, Keep up the good work!
@KrowezOnline 6 жыл бұрын
I love this Making it easier for DIY PowerWalls, thank you for all of your efforts and hope to buy these kits from you in the near future. My small goal is a tiny powerwall for my room in my apartment, in place of a UPC for my PC and entertainment centres.
@noncreditgold2661 6 жыл бұрын
Jehu could you tell me were can i buy that pcb? I already have got the rest of the parts here in PR.
@jehugarcia 6 жыл бұрын
I’ll make it available soon, it just needs final revisions
@nelsondisalvatore9812 6 жыл бұрын
I think you are up to something brother. 🙂
@guillermomarturetfendt9037 6 жыл бұрын
Do not build this!! The system doesnt charge uniformly all batteries! I will fail and explode with time. Trust me, Im an engenieer
@tranquilitytravels2994 5 жыл бұрын
Thanks. Really interesting, always learn something new from you!
@PsychTekNic 6 жыл бұрын
damn dude! you one smart electric guy! amazing :)
@emmseehammer 6 жыл бұрын
Jehu, will we be able to just purchase (Aussie thinking of shipping cost) the PCB's and source the rest of the bits ourselves?
@jehugarcia 6 жыл бұрын
Yes this will be fully Open source as well as offering the PCB Fully populated and unpopulated.
@emmseehammer 6 жыл бұрын
Thanks Jehu, Look forward to the official release.
@oluwafemioladunjoye6164 6 жыл бұрын
It will be awesome to be able to buy the PCB board. Some of us are novice like that in Electronics and would just like to buy and use.
@mr.e-toy6776 6 жыл бұрын
That is some great design! I love the simplicity! Keep it up!
@yoyellow1 6 жыл бұрын
That's nice, will the board design also be downloadable? so we can order/make it ourself, since your shops are mostly USA and give high shipping to the EU id like to create the board myself..
@stevenc22 6 жыл бұрын
Why not parallel the 7 cells on the holder and then use the solder in fuse connection to select whether that board is position 1, 2,3, 4 ect in the series stack for balancing purposes. Parallel more cells will help with the draw per holder and allow people to make any voltage pack they want.
@fernandorivera5115 6 жыл бұрын
If you just have 7 cells you can start working any 24v device/inverter with what you have. As you get more cells you just keep adding modules. In a 7p design you have to upgrade in 49 cell increments.
@stevenc22 6 жыл бұрын
Yeah I understand, this is great for a 24v system.
@jmonsted 6 жыл бұрын
For a power wall, adding 49 cells at a time doesn't seem like much of an issue. I mean, i've been toying with ways of scaling by 500-1000 at a time as a minimum.
@cmj20002 6 жыл бұрын
I agree and I don't car for fuse wire, I would use a fuse holder with ATO type fuse that stands out of the side of each. Also you don't need the holders you can use the type that goes on the top and bottom of the cells and use a stud to connect them, that way you don't have to worry about melting plastic.
@cschwehr 6 жыл бұрын
This is a great project Jehu! Thanks for sharing and working on this! Building a big wall with 1c draw would give people a huge amount of runtime depending on the config and allow the batteries to last a really long time... Going to be an awesome setup.
@jehugarcia 6 жыл бұрын
Well 1c is one hour, I think that’s what people don’t get, no one wants to build a house battery that last only one hour, powerwalls need to last 12-24 hours that means the load is going to be 1/12th or 1/24th of a 1c
@cschwehr 6 жыл бұрын
What I love is using this system, it can easily be expanded... buy ~560 batteries, add ~560 later, and so on. At 48V (what I've considered) you've already halved the amperage anyways. Thanks for all the great work!
@chrisfullauto6009 4 жыл бұрын
Loved the video, good work.
@TheJunkyardgenius 6 жыл бұрын
I also saw wes that tech guy using 38120S cells that have a screw top which means no soldering. He then used busbars and screwed them down. now I can't find an 18650S with screw tops but I had a thought. lf you weld a small nut on the top and bottom of an 18650 then packs can be made the same and just linked together with busbars and a screw. just making the cell with nuts welded on to them is in itself a very sellable product for the ever expanding diy power wall movement.
@jehugarcia 6 жыл бұрын
Yes I have tried that, but no one wants to glue thousands of little nuts onto cells
@TheJunkyardgenius 6 жыл бұрын
jehugarcia if you can buy a cell let's say 2 dollars each if you get a good deal and in bulk and sell them for 3 dollars with a nut welded on them or a heat proof glue. I think your onto a winner. perhaps your too busy to do this but anyone can as a start up and make a good business out of it while helping drive forward this revolution.
@MB-lh5kw 6 жыл бұрын
I'm very surprised the battery terminals are getting that hot with only 500ma from each battery, the contact resistance must be quite high , can you measure the voltage drop across the battery terminal and batter clip?
@webosm6494 6 жыл бұрын
Wasn't it maximum 4.5A per module (18A total). The batteries on the module are in series so each battery is delivering 4.5A. With that amount of current and temperatures I think the voltage drop is considerable.
@edwardgazi3177 6 жыл бұрын
Just watched a documentary with you in it .I am both impressed and interested in what you do
@JacobLorentzen 6 жыл бұрын
i like the proof of concept and that you share the test and idea
@J3sus1sL0rd1 5 жыл бұрын
Maybe you can try out 21700 battery.
@volkhen0 6 жыл бұрын
I don't want to be negative but I was testing these holders and at 1A the voltage drop at the connectors to the cell was up to 0,2V... these are not too good for good connection. The cell were not new so maybe that was a factor.
@Retinalism 5 жыл бұрын
see my comment (29/10/18), you are right Mariusz, friction contacts are unreliable, lack reliable current carrying capacity, and as your test shows, that 0.2V contact drop is the source of the quickly apparent hot spots (@11:30)......
@Callummullans 2 жыл бұрын
I came here from motherboard I’m really impressed by this and I am definitely going to be looking into this properly thank you for sharing your knowledge 🙏
@njfulwider5 6 жыл бұрын
Nice Holder and crazy merchandise.
@TheViewFromUpHere 6 жыл бұрын
Very clever design. Will you have a link to the PCB files?
@hawkeyes4768 6 жыл бұрын
TBH we need more ideas and faster ways to assemble batteries so anyone can do it and be up and running in just a few hrs
@joepah51 6 жыл бұрын
Dude you're pretty handy with those fine solder irons! Great video.
@davidriley7659 6 жыл бұрын
just had a thought about this. What if, instead of laying the batteries horizontal, you placed electrical tape around the 4 vertical poles and stacked the 18650s in vertically. Once you've worked out your exact pattern and how they stack together, you could design a PCB to match, and a small blob of solder on each "output" could be enough to make adequate contact with the battery. you also would use a multi layer pcb so that the top of the battery bank is the bottom of the next level. I just did a quick calculation that the PCB size of a 7 piece holder can stack 33 18650s vertically if staggered. Although your spacers would be double longer (the width of a battery), your PCB costs would be reduced by 1/5th
@shokovi 6 жыл бұрын
Four to five dollars to connect and house only seven cells is way too much, the assembly is too time-consuming, it provides no thermal management, the common rail that connects all parallel cells is just a breadboard pin that can easily fail and the individual cell fuses are not easily replacable. Why don't we, instead, invest time in designing a simple PCB to fit onto those 4x5 cell holders ?
@jehugarcia 6 жыл бұрын
Let us know when you finish
@CoryTaylor904 6 жыл бұрын
Lol
@jarekf3083 6 жыл бұрын
Those are valid points. This system costs more than batteries, which makes the whole powerpack cost twice. And is also not very efficient (not for EVs like someone said). It could be great for small experiments, but definitely nothing serious.
@haroldlopez2406 5 жыл бұрын
@@jarekf3083 Very True - the interconnect parts also rely on the (likely steel) riser hardware to carry the load out, which is significantly more resistive than copper. The amount of power wasted in heat on that design makes it worthless for more than 1 or 2 boards. There's tons of profit in those prices as well, so someone is making bank on this junk.
@horstebreedow8608 4 жыл бұрын
@@jehugarcia what a stupid comment. Why all Mexicans are so afraid of actual discussion.
@paulkennett 6 жыл бұрын
Nice tidy setup. I like it. :) Cheers, Paul
@rickjohnangeles5555 4 жыл бұрын
i love your works it inspire to build my own little solar powered using 18650 cells thank you for the guide and information you provide as for now im saving up for the solar panel ,bms and charge controller i made my own diy portable usb chargers
@glenngoodale1709 6 жыл бұрын
Its a great idea. Thank you for the share.
@sorryociffer 6 жыл бұрын
I would like to see a similar system for 38120 batteries!
@tabelq 6 жыл бұрын
sorryociffer Yes , and 26650.
@sorryociffer 6 жыл бұрын
Steve Abelquist if it was available in 38120, I'd buy some right now!
@fernandorivera5115 6 жыл бұрын
Sign me up for at least 100 modules. This is great for begginers and keeps the fabrication cost/time really low.
@juanjorx7 6 жыл бұрын
same if we buy them in bulk that will be great.
@Liquid_Economy 6 жыл бұрын
Great idea!
@jerry73j 6 жыл бұрын
Where can I buy some modules
@guillermomarturetfendt9037 6 жыл бұрын
Do not build this!! The system doesnt charge uniformly all batteries! I will fail and explode with time. Trust me, Im an engenieer.
@fernandorivera5115 6 жыл бұрын
This board is a prototype and will be upgraded in the near future. As for unbalanced charging, thats what the 8 pin plug is for...the balancer. As an engineer you should have written a helpful reply not that "Don't use this" remark. As a fellow engineer I exhort you to do better.
@NaumanBandey 5 жыл бұрын
Love your videos! keep up the good work bro.
@phyrexiacl 6 жыл бұрын
Great idea! The holder are not for strong use contact, but they can fit great in this projects
@garystinten9339 6 жыл бұрын
21700 racks would be nice.
@MADBONE0 6 жыл бұрын
Gary Stinten I second this!
@simonkete4809 6 жыл бұрын
probably need a place for thermal couple
@petercoutu4726 6 жыл бұрын
You can also look into getting thermo-set plastic holders for the cells. It would probably be a little more difficult to find but could possibly solve the meltdown problem.
@racia4095 6 жыл бұрын
I say you are headed in the right direction. A challenge I would hope you can address is choosing the right BMS that's affordable.
@ShadwMan 3 жыл бұрын
Is it bad that every time that I watch this video I scream at my computer because Jehu is tapping and scratching the PCB with the metal tweezers?
@majorredbeard 3 жыл бұрын
No, it's not bad. All I could think during that segment is "You are using tweezers like someone would use their finger, or something more delicate!"
@emmseehammer 6 жыл бұрын
I'm confused. Jehu, you inserted all the batteries with positives to the top and negatives the bottom - I would have thought that was paralleling the cells? Is the series-ing done on the PCB traces? To me this looks like a 28P pack. Love the design and implementation and would definitely build my powerwall with these as this design makes it so easy to swap out cells.
@rogerthebarista9732 6 жыл бұрын
There are no connections within the battery holders, so yes, the series connections are made on the pcb. It's a good idea because you are very unlikely to put a cell in the wrong way...
@andrewness2153 6 жыл бұрын
^ what he said. It looks like with this particular PCB, the board takes care of the series connections. If it was made in a way where you need to alternate battery orientation in the battery sleds, I could defiantly see myself making a mistake at some point and installing a battery backwards. In my mind, positive up and negative down just clicks, so that's how I would do it. Obviously you can do it any way you want as long as you know what your doing and weld the plans into your brain :)
@kendobo2376 6 жыл бұрын
Thanks for the great info and channel!
@barranness 5 жыл бұрын
bro, if you were an instructor like at a local college or tech school, i would definitely take your class. your awesome.
@AaronGoodrich77 6 жыл бұрын
@Jehu, have you considered using thermal grizzly gallium based conductive thermal interface material? I have a feeling that you can better every single set of efficiencies @ connection points and solder points to increase transfer "rate" of electricity to heat ratios. I am no scientist nor claim to be anything more than a guy who figured stuff out by trial and error. (A tinkerer) If you need clarification later feel free to drop questions here below. I would like you to reference how CPU chips are transferring heat when they are overclocked (such as in my ballpark). Then once you realize by sealing the metals together like solder(sp?) does... but not having to do so, you get a drop of 20c by using the thermal grizzly TIM (thermal interface material). So in my case by focusing on the amount of wattage/transfer rate my All in One liquid CPU cooler by Corsair (H105) and by using the right type of fans in the mix. (I use static pressure fans with a focus on the exiting fans to be a "air flow" type fan. (Bias to Corsair and Noctua fans only.) I can control the amount of heat dissipated at the cycle of cooling in the radiator. This enables me to perform faster heat dissipation at the radiator level of the all in one cooler. I read a little on thermal dynamics because of interest. Static pressure around whatever is producing heat also is helpful if it's moved at a proper CFM/Pressure rate. I could see power walls future state including some tech/computer based thinking when designing.
@totalchaos1976 5 жыл бұрын
gallium=galvanic corrosion check make sure your not going to have a problem . you don't want the metals in the batteries or terminals breaking down. you wont know there's a problem until it blows up in your face .. update 18650 casings is made of aluminum, gallium loves to eat this alloy .
@wearemilesfromnowhere4630 6 жыл бұрын
ABS plastic is typically good til 150°f. I had the same experience with these cell holders. Kills the efficiency.
@hyraxist 4 жыл бұрын
Thanks for inspiring all of us. Keep it up.
@zodiacfml 6 жыл бұрын
I had a good guess for failure on those plastics. Typing that, I realized that there are more problems with the plastic holders even if you avoid the excessive heat. The plastics will surely get weak overtime and will cause the terminals to loosen which has a set of problems. As mentioned by one comment, they are great for portable applications. I don't have a a proper solution yet but a frame made from aluminum came to mind.
@InboundG 4 жыл бұрын
Is no one going to pay attention to the fact that he did not actually use the resistor lol
@stevenx3m 4 жыл бұрын
He used its lead instead of a fuse. Bad idea when playing with lithium batteries.
@TheJunkyardgenius 6 жыл бұрын
Great jehu. its still going to be a bit of soldering. We need something totally idiot proof that just clips together or mechano like and just uses nuts and bolts. extremely simple! A child can put together. those holders, design a new version of them that just snap or bolt together. There is the market for this product.
@soldermecold7456 5 жыл бұрын
The amount and type of soldering on this job is novice level... I was doing this type of soldering while I was a child. Soldering is easy to learn, cheap to get started, and an excellent skill to have as a DIYer. Personally I enjoy soldering, and the amount on this project is light, fun, and stress free. Give it a try, and don't forget the flux.
@thenegotiator9701 5 жыл бұрын
Solder Me Cold exactly it doesnt take a lot to learn it
@tripzero0 6 жыл бұрын
You could also include cutouts with pads similar to the fuse holder so that people can turn it into a 4S or other configuration. I mod'd my pack with a wire from the 4th positive pad back to return positive line to make a 4S configuration. I also attached holders to back so that it's got 8 cells total.
@mghuertas 6 жыл бұрын
Awsome the power from 28 batteries thanks for sharing
@shadyworld1 6 жыл бұрын
Are there "Silicon" Frame !? Kitchen Silicon resistant to heat + safer than plastic ! At least Silicon bedding at the positive and negative ends
@garystinten9339 6 жыл бұрын
It gets hot here and that seems rather hot. Perhaps a non conductive metal with rails might be a better idea for a rack.. to dissapate heat better.
@noahhounshel104 6 жыл бұрын
>Non Conductive >Metal You can have one, not both.
@nic12344 6 жыл бұрын
Gary Stinten If you find a non conductive metal, you will receive a Nobel Prize!
@niniliumify 6 жыл бұрын
Great Design
@zerocks88 6 жыл бұрын
I really love the idea of this and how manageable it makes a DIY powerwall for post production stuff, being able to just swap in batteries is an excellent idea! I would love to do something like this but I don't see it happening because it is still quite labour and time intensive and if I end up fucking something up it could cause havoc somewhere down the line thanks for the video though it was good
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