Manually balancing my 18650 DIY powerwall top bank of cells
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- čas přidán 24. 08. 2024
- Making some balance lead for my batteries - it's the hard way but it worked. So glad I now have Batrium BMS installed and I don't have to do this anymore. It was cheap but time consuming that's for sure.
Paul Kennett • Laptop Powerwall 58 - ...
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Thanks for tuning in as always!
Pete
Maybe you should cover those holes with fine screening to keep the critters out.
Perhaps the clips should be crocodile clips in Australia, alligator clips in the USA and caiman clips in South America!
You are giving us free advice on your blog and we think that that is enough. You might arrange it into a series with numbers so others can follow and go back to a certain issue to see what they may have missed.
Fantastic idea ...
@@HBPowerwall As a new guy here, this would be the best. Neither youw or any of the other CZcamsrs have series or anything. It's just a lot of vlogs and "daily life" videos. Would apreciate shorter but more focused videos on like what is balancing batteries, and why do you do it?
Love it brother. One day when you can would you show us the electrical power meters. I know it's funny but here in USA we just have one electrical power meter for the power we buy.. So would be cool to see how it works for you guys. God Bless Brother.
Thank you for your videos. You are very inspiring to the newbies out there.
Thank you - !
The irony, over 3,000 cells and you have to stop drilling because of a flat battery.
hahaha !
Probably got 18650's in it too hahah
Most of them do nowadays
To HBO and other experienced DIY-ers . Your channel is very educative. I have a 24v,920Ah forklift battery + 12, 3000F Ultracap 2.7V in parallel with the battery. A 3.5KW solar power input expandable to 5.6kW.
Daily sunshine +/- 10.5hrs
I have ample supply to dead laptop batteries.
Question: How and what is the best, fastest and safely way to sort these 18650s wuthout depending on false balancers and checkers from ebay.
I use eBay ones and am happy, many have gone TP4056 for charging and *can't remember the discharging setup* but for the convince I'll take the 4s dischargers
"Cooles T-Shirt "
Thank-You
Hi I've only got a small pack (4S35P) I found bottom Balancing the packs individually down to 3.2v rest 24 hours then bottom again untill all packs are bottom balanced, then as a pack I charge to 4.1 - haven't done too many cycles yet but all cells have stayed level through top to bottom charge.
Sounds like you have an extremely well built balanced pack I'm impressed, i top balance and easily get .3 ish volts different at moderate discharge and much larger at deep discharge. Working on slowly replacing packs and making a more balanced pack. Will take time :)
Around here we call those clips / clamps, alligator clips.
That's the one lol
Yes hi how are you doing?...since I disnt see any videos?...I was wondering if u could do, can do a quick, simple 101 video on how you set up your bus bars to the packs?...& then how you connect the packs Together?... I understand everything except, until you get to the part of setting up the bms... & connecting the packs together... & then balancing them...thats where you lose me... thanks
Happy B-day for Monday :-)
Cheers bud
The Green t-shirt looks great! Mine hasn't arrived yet. :(
Suddenly wished I'd ordered a second one too.
If they are still available i'm going to grab one size smaller. Perhaps if it's worth it to do another run do one with out the logo on the back. Just on the front
Which size did you go for? Once I've got mine I'll do a front side only campaign. Might look for a cheaper service too!
I'll check in the morning. Tshirts are comfortable and seem very well made.
Where did you get them?
My designs are available here: teespring.com/stores/18650-merch, but Peter is doing his own one now so you might like to support him: teespring.com/diy-powerwalls-dot-com
You are the man who can help me;).i made a small power pack with 18650 cells.its a 12v 10ah battery.i do not have a pcb connected.i putted a balance cable though.when i try to balance charge the pack it gives me different voltage for each individual cell.so i get 3,5 for first series than 4,05 for second and 4,1 for third.am i missing something?i have the feeling something is wrong with the charger
Good video. May i know what is nominal voltage ? For samsung 18650
battery, the max is 4.2V, what is the min voltage i can use ? What is
the range of the voltage I should use for normal usage or prolong the
life of the battery ? Can explain more to me or us ?
I operate the cells between 3.6v and 4.0v to try make the last longer. I will change those setting if bad weather is expected to 3.4 - 4.1v
Hope you guys fair better than we did in sa weather wise that is
SA looked like a war zone!
It felt like it especially with the statewide blackout I'm guessing there will be a mini baby boom in nine months time lol
I am pray for a new larger shed for you setup. Good luck on that one. Do you ever see signs of mice in the shed or small bugs? If I did that it would be full of bees.
No, one of my good mates is a pest control guy, all my bees (native & honey bees) stay in their hives :) I need larger shed or less Timtams !
Pete, any idea what amount of current is flowing, when you balance the packs by your "Dundee" cable?
Also any idea what the current, between the packs, is when you are balancing the complete packs in the shed?
Don't really but could be a great test ! I'll see what I can do to answer that question for you in the coming weeks.
It should be very small. The voltage difference is very small, so not a lot of potential for high current.
If one of your packs is for some reason slightly weaker/lower voltage than others, does power flow into that pack instead of out to the load? Asking because I'm going to be building a pack and looking at using a 16S10P configuration. Just wondering if the parallel legs need any protection. Thanks for your help!
So all you do is just connect all the packs in parallel and let them balance themselves out?
Yep - that's how I've done it however now I also add a charger it seems to balance much faster
Excellent content, but jeez the timelapse music is set way too high compared to your microphone. Entire video i have to adjust my volume
Yeh, i do it better these days - that was YEARS ago :)
Hey Pete do you remember what size wire you used...and about how long did it take..I've had mine set up for about 6 hours and it hasn't moved..figured it would take a day or so,,,but also thought I'd see some movement by now
Days and days i think it was a comment here that said you add a charger to it speeds up the process
I'll look into that..I do have a few days though, ,ran out of solder to finish the rest of the packs,,but,.thanks for the reply
does soldering the terminals on each cell have negative outcome? negative in terms of capacity reduction or damaging the cell.
it does seem likely according to all reports - i plan on testing that theory as well as i can :)
Is the black t-shirt with green lettering for sale? How much for a 2XL ?
Hello, love the channel and watch as often as I can. I'm trying to do a scaled down version for my garage work shop and have a friend who does computer recycling/resale as a non profit charity and he says he can get me quantities of the weak (no longer usable for laptops) Dell packs but was wanting to know what I should offer him for them (obviously the money goes through his 501-3c charitable) I of course have the proper chargers and equipment for processing the cells and have already done a few that I had around so I am comfortable with that end of the process. Any thoughts would be appreciated. Thanks.
Offer them what they need to get by, I try offer charities just a little more when i have the spare cash - it does depend on so many factors on price tho..
Thanks for Your Videos !! Have you done any calculations like cost per KW for the 18650 batteries? ... and how many 18650s do you have total? Thanks!
I have roughly worked it out, that info will be in the 5000 subscriber video. Tested cells in service 2240 + about 800 more ready to go into the next battery.
Planning to point a domain to something like freeforums ?
+station240 haven't really looked into it
I'm not sure about that side of the world, but if you are (or know) a Linux geek you can stand up a cheap (like $5/mo at digitalocean.com -- if you want a referral code from me I'd be happy to provide one) VPS and run phpBB on Apache or nginx fairly quickly. I set up a gaming forum with a custom header image and several different forum groups in a couple of hours (not counting the design of the header image).
I know this is a old video but I’m trying to build my first powerwall and need some help please
I don't do personal help at all.. but there is heaps of good info out there. Good luck with your project
I've been watching you for sometime now and I have seriously considered jumping in full on. Right now I can purchase new panasonic cells for $3/@3200millamp@ 10amp co @ 80 degree c. I like your build. So to make 14 packs how much would material cost be to replicate your build? Thanks so much for your very informative show. Charles
Dam, I think in the description I have a link to how much it all cost - I've redone mine so many times now it's hard to say price now - that said I would really like to work it out accurately sometime soon..
so ahh.. how are you monitoring the cells? you got charge/temp controls to each cell? i assume them 18650 don't have current overload/discharge/temp circuits built in?
and yeah, new here, havn't watch all videos yet, you may have explained it in another video i have yet seen..
+Maximus Psychosis very manually, over under bank voltage Via charge controller temp 0.1 amp average load 0.6 heaviest possible load. Every aspect is in many other vids. Work in progress for sure.
i see, so can you see the cells in the back of the pack potentially going short circuit and thermally running away?
or does the cells have inbuilt protectors? easy way to tell is if you see a wire bump under the shrink-wrapping and they are usually just under 70mm tall over the unprotected ones of 65mm..
so yeah, if you're not dropping them under 2.5V and not over charging them to 3.5v (and keeping to the low load of 800mA) you should be safe
on the other hand, I'm going have no choice but to copy your setup lol nice a neat, easy to maintain, good stuff!
Absolutely could do that but then again ( insert NASA Samsung quotes here) One cell ( single 18650 ) already has dead shorted, if you flick back through my videos and the cell fuse broke and it was a non issue. No cells are protected they are used cells from laptop batteries. Voltages are between 3.4v & 3.9v cycled daily
yeah, fuses are better then nothing (just about to watch your rant on this),
getting a 4 cell controller will set you back about $6(off the top of my noggin) each (or one with thermal cutout for about $12 each, but they only have 1 thermal resistor to work with) and you have just a small hand full of cells per rack, about 40/rack? so that 10 each x 7 racks by 4 sectors? that's about $1680 for "piece of mind protection" from china though ebay?
these cells do scare me, but with the cells you've used, nothing's gone catastrophic yet?
also, needed to replace any yet? I have read they have about 100 to 300 cycles
No fire (yet) and there is a line up 1000+ long that have said i'll burn my house down - To those please take a seat and watch the show..
I currently have 5 spare packs that take less than 5 min to swap out if I see high or low's that I don't like. The voltage gets checked 3-5 times a day. In the first 10 hours of full time use i sat next to it with a thermal camera. Doesn't stop bad things from happening but (nasa /samsung)........
This thing is still evolving and will continue to grow and improve as funds/knowledge allows.
Do you balance all the individual batteries before putting them in to the cells?
No, each 80 cell ... cell will self-balance then i manually balance as in this video
so would saying that "batteries in parallel will self balance, and you manually balance the cells going in series" be right?
yes 80p packs self balance then parallel up the 14 packs once balanced then they are a balanced 80p14s bank
I realise that you knew what you were signing up for but will this ever be a set and forget deal ? Or will there always be ongoing maintenance
Constant, well till the project progresses - I believe that'll with time it will be come safer and more stable. For a project like this complacency will be your undoing fingers crossed I can find a balance between paranoia and economics. Time will tell.
Hi y resersh 1 bms for my rv on 7s 40p, 1500 mah . How Many a gave ampères please . Its my dirt projet
Gudday sir pet! Just wanna ask.how long that used 18650 will last? And whats d minimum mah needed when building the powerwall? Tnx!
Impossilbe to say as you don't know the life the cell has had up to when you get it.. so it's a huge guessing game. Personally these days i don't use under 2300man
@@HBPowerwall im plan to build mine.but its just a small setups..so 1800mah will do for a start.tnx!
Music is quite stressful.
Turn off your speakers?
Whats the price for a real balancer (BMS) circuit for a setup like this ? so it will manage the balance by itself ?
had priced some for the 24v setup and it was like $700 for a professional grade ones. My main this is appearance I don't want it to look like a mess of wires. Simple and clean. If I had a larger shed I've considered the option of a false wall to hide all the cabling. There is a lot to this question and even more to try get my head around. I'm happy to just check it several times a day for now.
One could make a balancer for each cell, just a load which will turn on when the cell is over 4.15V, turn off when its under again.
One could, but not this one...lol
hehe :D If I had the time I would make some for you ;D awesome project btw
You could automate it. You'd just need a few contactors. :)
Nice tshirt
Paul Kennett sorted them - don't know if they are still available.
What is the Windows PC in the sched for?
+Benjamin Henrion I can hook all the inverters and stuff into it and remote in to them.
The only thing I saw I didn't like was windows.
Some people don't like holdens but drive jeeps.. each to their own ...
You balanced them all up to 4.1 V?
Yes
Then take it back to 4.0 volts max
Hi, which function has the computer in your setup?
Computer displays all the data from PIP inverter, SMA inverter, PCM60X & BVM700 energy meter. I can connect to that computer from any device to control my setup and log all required data.
Why is it every youtuber thinks they have to blast music.
I'm sure EVERY youtuber is an exaggeration maybe some, or a small subset of tubers but certainly not every one.. just saying
Gharial clips in India
Remember diversity!
nice shirt, video with music this time... Nice
WTF MUSIC WAY TO LOUD MAN!
JUST THE WAY I LIKE IT TURNS OUT!
hb send me a link to where i could have this done
it's all about doing it your self :)
heya just jion your FB groep unther the name paul willems