Batteries for Home Backup, 14s 48v (51.8v) LG Server Rack Lithium

Рет қаралды 408,644

3 жыл бұрын

These are used lithium batteries with 2/3 life left in them. I bought them from Battery Hookup. In this video I tear them down, wire in a BMS, and capacity test. I think these batteries are best suited to home backup systems. Where you are on grid and won't be cycling them daily.
Lots of details on how to wire in the BMS.
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My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements.

Пікірлер: 516

@yankey4 3 жыл бұрын

Brother you do one hell of a job teaching. Your videos turn out so well. Thank you for sharing this. Would you mind sharing a link to where I can buy that big soldering iron you have or one close to it. I know I can find one but would like to use your links. Thanks so much brother. God Bless.

@DavidPozEnergy 3 жыл бұрын

Sure Bobby. This is the one I have: amzn.to/39JOzIa It works fine, but I haven't compared it to any other large irons. Does what I want.

@flojotube 3 жыл бұрын

I CONCUR 100% - it’s David who gave me the courage to start harvesting cells from batteryhookup and now I’m sorta frozen in fear with a huge stockpile LOL... I wish he was my neighbor - I NEED HELP... @DavidPoz NO MORE 10% OFF????? WTF’s up with them??? They also have become TERRIBLE with communications... the phone NEVER WORKS and emailing them is fruitless to say the least. I don’t get WHATS happening there..

@alext8828 3 жыл бұрын

@@flojotube Uh oh. Sounds like they're going corporate. David gave them too much business. Now they don't give a shit? Not good. I was looking forward to using them.

@dizzlethe7346 3 жыл бұрын

@@alext8828 Naw not like that at all LOLZ. IDK what tube is talking about... But he still gets the 10% an ya they kind of did go corporate in a sense, They got Flat shipping rates $350 that lowered cost's ( I spent as much on shipping as I did my first pack $1200 lol) They are doing more testing to all cells now, An they give 5% off to all orders w/o YT codes... They did change when you put the code in tho... It is no longer at cart but during check-out.

@JjMn1000 3 жыл бұрын

@chucktrotter9699 3 жыл бұрын

12.5.20 Yes like the long videos. showing more detail on how to set up the Batteries and BMS. Thanks

@DavidPozEnergy 3 жыл бұрын

Thanks for the feedback.

@vincei4252 3 жыл бұрын

Dave you've (an the peeps on the Facebook group) done all the work that I was about to do but got sidetracked by a handful of bad batteries that were sent me. I will say that BatteryHookUps response was top notch. They immediately shipped me 4 replacement batteries without being asked, compensated me for my time and the supplies I had to buy to package the 4 batteries up and ship them back. In BatteryHookUps defense they would not have known that there were issues inside the pack because I was the one that broke the screw locker on all 4 packs that had issues. A minor annoyance that set me back a week or so but has now been resolved - the new batteries were delivered yesterday and going forward when these are in stock again they will open and inspect every pack before shipment. When they are back in stock I will for sure be buying some more. Thanks for the great video as usual!.

@josephdecker0 3 жыл бұрын

i'm pleased with battery hookup and their products. you do a great job advertising for them, and your instructables on battery tech are some of the best out there. keep up the good work!

@golf_n_hockey 3 жыл бұрын

Well done. The fact that you continued to disable to realize you could align the cells in parallel rather than series was way cool. Thinking outside the box!

@martinmiller7623 3 жыл бұрын

Your enthusiasm is thrilling. It pushed me into purchasing one. I plan on using it to increase the capacity of my bluetti ac200. Thanks so much.

@spkay31 3 жыл бұрын

Great video. Excellent teardown and explanation of the BMS installation procedure you used. Really great description of application of a on-grid whole house battery backup system.

@walker27productions 3 жыл бұрын

I love those soldier joints I use them all the time on automotive applications. One tip for people is to make sure all the soldier melts if it doesn't it may end up being a dodgy connection. Also try not to move it too much while it's cooling

@jwrhynejr9608 3 жыл бұрын

Great visual guidance as expected! Awesome detailed information! Thanks again for your expertise & time in doing these videos!

@krystofzajicek 3 жыл бұрын

Congrats on 100K subs. Keep up the great work

@jarrellestes1793 3 жыл бұрын

Grown a lot me and you, used your 10% code on battery hookup THANKS. KEEP helping it helped us all.

@joelhansen7373 3 жыл бұрын

Most detailed video on how to do every step of a battery build I’ve seen! Thank-you!

@DavidPozEnergy 3 жыл бұрын

Thanks

@zaprodk 3 жыл бұрын

I love the cell trays are so nicely built so you can move and rearrange the cells as you like

@briandavis9975 3 жыл бұрын

Great in depth teaching David thank you for taking the time to share it.

@mikeriverajr4447 3 жыл бұрын

just wanna say im a long tine viewer [feels like 2 years] and i love your vids man , keep it up!!!!!!!

@roqm1248 3 жыл бұрын

Great video and congratulations on the 100k milestone!

@petercosta7173 3 жыл бұрын

Great video once again, love watching you explain all this and inspires me to undertake a similar project! Thank you!

@mannymota3442 3 жыл бұрын

Nice, your videos keep getting better and better!

@pvjraju 3 жыл бұрын

I am very much impressed about your practical teaching about BMS.Thank you very much

@WhitlowEntertainmentBureau 3 жыл бұрын

BRAVO SIR!!! keep it up please! We have all been thirsty for this great battery content!

@wb7sff 2 жыл бұрын

Thanks David for the tip on the low temp solder connectors. Had to order some of those.

@marcio-si8xd 2 жыл бұрын

First time someone show the batery test with details. thx you :-)

@ronaksoni2729 3 жыл бұрын

Congratulations on 100k subs 👍❤️

@seabreezy3368 2 жыл бұрын

David, your videos are great. So much information. It is obvious that you are a natural engineer. After watching this, I feel the need to decompress. Off to watch the Naked Gardener.

@sams5803 3 жыл бұрын

100k subs woot-woot David thank you for your content take it all apart yes!

@fisherus 3 жыл бұрын

Congrats on reaching you 1st 100K subscribers! I am sure that the second hundred will come much faster, since you have now become recognized as an authority of both batteries and solar systems. Really a great comprehensive video, David. My question is, "did I see you using a new soldering iron and, if so, what kind is it?

@DavidPozEnergy 3 жыл бұрын

No, I've had that soldering iron over a year. I have used it in several videos. It's just a cheap, but big watts, from amazon.

@ninehundreddollarluxuryyac5958 3 жыл бұрын

Thanks for showing how they can be split in half and/or reconfigured for different voltages and parallel connections. I might split one of the 24 volt modules and restack for 48 volts and half capacity as an ebike battery thats half the weight of the complete rack mount unit.

@larrybell4599 3 жыл бұрын

Awesome video. Thank you for taking the time to explain everything you did.

@invetech1 3 жыл бұрын

You are doing a great job at all of this. Hope you keep up the good work.

@stinson87 3 жыл бұрын

One thing I found with my larger LIFEPO4 pack is even though I purchased them as a matched set, they can still deviate. I run a High current balancer in parallel to my 200A Daly BMS. This makes sure that under high loads I can keep them balanced better to prevent those super low cells. This 200Ah 12v pack is used in an RV that usually sees very low load, but my 2kW/4kW inverter can cause a sag that triggers imbalance protection early, also my truck is equipped with dual 330A alternators to a high current bus, before the balance board was installed, the high current to top off the battery when towing (trailer can get up to 150A through my Anderson aux cable and DC/DC controller) would trigger the BMS to go into imbalance protection, now I have to pull 400A to even see a variance in cells, but the daly only lets me do that for a few seconds.

@freemanshines 3 жыл бұрын

The ending to your intro is one of the cutest things on KZfaq...

@tsp2jxd 3 жыл бұрын

Great video D-Poz. It would be great if you could show how to make that a 24v battery for use in 24v systems.

@patyagecic3075 3 жыл бұрын

Very good video David, keep up your great informational videos !

@pedradagarcia9156 3 жыл бұрын

Thanks David this helps me a lot to build my power vault battery

@ArthurDent0042 3 жыл бұрын

Excellent video, as always -- clear and concise. I love seeing the step-by-step tear-down (and re-assembly) -- it takes a lot of the mystery out of these things. And I am envious of your workshop -- nice setup! You answered a lot of questions, raised one or two more. You mentioned these might be good for backup (which is what I'm looking for). I'm guessing they would be stored/maintained at a storage voltage of ~3.7V per cell until needed. In the event of an outage, they'd be put on line (either a manual or automatic transfer switch), and the charging voltage set to full (4.2V per cell). And once the grid is restored, draw down to 3.7V per cell, and then taken off line. This is assuming that Li-Ion batteries lose capacity of stored for long periods fully charged (like the LiPo batteries I use in rc airplanes). Is this a sensible line of reasoning? Thanks for the excellent instruction -- you've been a great help to get me started in this game.

@DavidPozEnergy 3 жыл бұрын

If I was using this as backup, and it will be sitting long periods of time, then we have a dilemma. You are correct, that 3.7v per cell is considered the best long-term storage voltage. But, on the other hand, in the event of a power outage you will want as much stored power as possible. Personally, I'd probably set my charger to 4.0 volts per cell (56.0v) for a good balance. I'm also the type of person to test my equipment, so I'd probably do a full cycle (discharge/charge) every 6 months or so.

@RichCompMan 3 жыл бұрын

Love your channel David keep the Videos Coming!

@kevinwhite9919 3 жыл бұрын

excellent walk through, really appreciate it. answered quite a few of my more procedural questions about how to get this done, and loved the pragmatic eval at the end.

@DavidPozEnergy 3 жыл бұрын

Glad to help

@jensonworldchamp 3 жыл бұрын

Well done David, thanks so much for putting this information out on KZfaq University :)

@gregs7918 3 жыл бұрын

Excellent descriptions as usual!

@paperburn 3 жыл бұрын

Pro tip: when removing rivet nut just use a drill bit the size of the barrel on the washer side and they fall off.

@Jayscjs 3 жыл бұрын

I love your channel, keep up the good work.

@lckoolg622 3 жыл бұрын

Good teaching on how to make a daunting task seem manageable.

@anuraggoel4742 3 жыл бұрын

Very nicely explained everything almost. I loved every bit of it. It was very exciting to see but sadly these whole arrangement is very expensive & as you said it last max up to 2 yrs. if used as daily home usage. Love from India. I am looking forward for many more videos of yours in future. 👍

@caddyzig 3 жыл бұрын

Great video! Thanks for doing such a nice job explaining everything so clearly. Your videos are always really interesting.

@cherylmartin4050 3 жыл бұрын

Hey thanks for showing the testing of the plug. I would think that can be useful for any application of plug. I've been wanting to change out my gauge cluster in my Jeep Wrangler to some independent gauge replacement's. And this information answered my many questions. So thank you!!

@DavidPozEnergy 3 жыл бұрын

Your Welcome.

@panospapadimitriou3498 Жыл бұрын

happy new year... nice video... i think for a storage with some needs 2./3 days a week ..i m going to try lithium used !!! keep up

@FrancescoOliveri 3 жыл бұрын

Awsome. I never got thise because all my batts are 6s and im not planing on going to 7s. This is awsome thanks a lot man.

@bobanderson1727 2 жыл бұрын

Great video! Lot's of good information to digest. Thanks for sharing.

@DavidPozEnergy 2 жыл бұрын

Thanks for watching.

@AveRage_Joe 3 жыл бұрын

The 2s was exactly how I was gonna build packs into empty ups cases for my rack. I was gonna use 18650s tho but didnt have enough lol. Nice video!🤘

@DavidPozEnergy 3 жыл бұрын

That's cool Joe. Thanks for checking out my video.

@timotion7 3 жыл бұрын

This is excellent! I really enjoy your videos! One comment, I wouldn’t use loctite on a conductive threads, since it can act as an insulator. instead I would clean the surface and use conductive grease optionally for long lasting good electrical connection! You are awesome, keep it up !!

@DavidPozEnergy 3 жыл бұрын

Thanks for the comment. I got into the topic of Loctite in another video, might be worth checking out. kzfaq.info/get/bejne/qbaKqq9i38XVqH0.html

@JerryRigEverything 3 жыл бұрын

Cool video! Thanks for the info!

@Mike-kr5dn 3 жыл бұрын

@CARL JOHNSON why would he do that? Leave him be.

@mikebroom1866 2 жыл бұрын

maaaaaaan I wish these were still available. 2 of these would be perfect for my project.

@ATW643 3 жыл бұрын

Nice vid David , I learn a lot from you.

@thompsoncrusher7840 3 жыл бұрын

Another awesome video. Always learn so much.

@Shmade0304 7 ай бұрын

Miss the days you did videos like this .., not saying it’s a bad thing but so many turn key batteries now since then .🙌🏽🔋

@jamess1787 3 жыл бұрын

Just woke up from nap, what a nice surprise!

@ThePytercoyote 3 жыл бұрын

Hello David. Wanted to thank you for your videos. I think the time it takes is what it is. 😏. I think it is very informative that way.

@sampathperera200 2 жыл бұрын

great video, really helpful for DIY guys

@MiguelAlejandro1969 3 жыл бұрын

Congratulations for 100k subs.

@lindafoxwood78 3 жыл бұрын

WOW. Great video. Lots of good information. I am looking at buying some LiFEPO4 for my system. I got 2K solar now and only L-16 batteries at 24volts. Works good, but I need a better storage battery.

@jrchurchman13 3 жыл бұрын

These were all recalled, I imagine these were all pulls from that recall and why there's so many of them on the market right now. I wouldn't use them in any large or permanent installations, only for experimentation!

@kennethkirklin6959 3 жыл бұрын

So how do you find out they were recalled.. I bought 8 of these. Pencils out to anout $141/Kwh.

@kennethkirklin6959 3 жыл бұрын

Why not use them in a powerwall. Was gonna use them at a vacation lake house.

@kennethkirklin6959 3 жыл бұрын

Using (8) 60A Daly Bms should keep me in cheap power for a few years. Whats my downside?? Thanks for any info in advance.

@ebenwaterman5858 3 жыл бұрын

Check out the shipping cost. $350 in any qty I think.

@edc1569 3 жыл бұрын

diysolarforum.com/threads/warning-factory-defect-ess-lithium-polymer-battery-packs-from-lg-chem.4349/

@seanstage 2 жыл бұрын

Really good information!! Thank you

@pteepan2708 3 жыл бұрын

thank you for the video and an EXTRA thank you for the last bit when you talk about them in a total off grid system. I think I'll be able to work it out but next time could you put the cost per year. like you said these would last about 2 years in Off Grid so that would be ?????? 7 x? $. only lasting 2 yrs would equal ? $ per year I'm also happy that you often don't OVER HYPE these battery pack videos. it's nice to get somewhat real numbers in a real world situation.

@Dutch_off_grid_homesteading 3 жыл бұрын

heya yes love the longeer and more detailed vlog hope to see a real BIG off grid DIY bilt battery and solar vlog

@user-te6uh6bb8r 3 жыл бұрын

Really clearly helpful video ever~~!! Wanna see more of yours~~~ 👍

@mackfisher4487 3 жыл бұрын

It would be nice to be able to see how it was designed for its server application, particularly how the battery monitoring is configured.

@John-bb4wk 3 жыл бұрын

EXCELLENT VIDEO!! thank you. I need to run it at 24 volts. And after watching this a few more times I think

@stevenbeaumont1698 3 жыл бұрын

I quick tip for you David when you use the heat gun. Bend heat shield attachment round a piece of pipe to make a L shape so you only melt the solder in the connectors / heat shrink.

@chriss2295 3 жыл бұрын

Excellent format. You are a natural teacher. One could fast forward if needed, but you’d miss specific content for this pack.

@zachhoy 3 жыл бұрын

So glad KZfaq led me to you, subbed

@zachhoy 3 жыл бұрын

and congrats on 100k!

@Songomx 3 жыл бұрын

Liked this one... A LOT!!! Thanks...!!!

@guy7gsa 3 жыл бұрын

I liked the longer detailed format.

@hitman1924 3 жыл бұрын

Very well done david

@michaelblackstock6140 3 жыл бұрын

Nice job David.

@alexandergdansk 3 жыл бұрын

Good job, David! :)

@FrancescoOliveri 3 жыл бұрын

I was waiting for this video

@jesusprado6394 3 жыл бұрын

Great video. Thank you for sharing your work. 👍👍. God Bless you.

@jamest.5001 3 жыл бұрын

I like to use 20ga for balance leads, or atleast 22ga, the silicone insulation on 20ga is a bit thick for the pin yourself connectors, but 22ga works well,

@greenftechn 2 жыл бұрын

I recommend a multi-tool for some of that cabinet retrofitting, over the grinder and jigsaw.

@tadgyro Жыл бұрын

Awesome video. It would be great if you could show how to make that a 24v battery for use in 24v systems.

@shingiriraimashiki5350 2 жыл бұрын

Thank for sharing this lecture

@1981dasimpson 3 жыл бұрын

i would of cut the neg bus bar to join the bms to so both stock terminals at front are used and all bms connections are internal

@titusjames4912 3 жыл бұрын

I love your intro. It's short and cute.

@ShaneS071 Жыл бұрын

if you look at the discharge curve it is a perfect U shape on both halves of the battery

@j.r.3215 3 жыл бұрын

Like the longer videos...It seems as the packs don't work as well as the cells do...keep up the good videos.

@andycanfixit 3 жыл бұрын

Paralleling multiple packs is what I did with my bank I built from the A123 36 volt packs I got from them. Currently have 10 packs with each cell group in parallel, and I converted them to 16s 48 volt packs by breaking apart a few packs from 12s to 4s and then adding those 4s packs to the complete 12S packs. Built out I have a 100ah 48 volt 16s pack and they are good for several thousand cycles. Just ordered some more of them and will expand my pack to 16 in parallel. By doing so all the groups are very even, none are drawing any sort of high c rates for charge or discharge and they are performing amazing compared to the BYD packs. If I were to do it all over again I would have never bought the BYD packs, I have 2 of those and while one of the two was in quite good shape, the other one is a mess of varying weak cells. I've had to add additional cells to each of its cell groups to balance it out and get it closer to the first pack. Setting up the A123 packs was more time consuming but it's performance is just so much better.

@davidrobertson1980 3 жыл бұрын

David you're awesome!

@robertkinney5826 3 жыл бұрын

Not boring if having never seen before.

@doglabdogtraining-gus.8873 2 жыл бұрын

Great video again

@Tazmann14 3 жыл бұрын

Super kanał. Jesteś gość. Pozdrawiam z Polski.

@josephkrestan3093 3 жыл бұрын

Great information, I’m going to look up some of your videos. I’m a new guy trying to build a 7s 24volt battery pack that I will be able to use. Eventually I want to build a home power wall, and be able to remove a battery pack and use the one pack as a power source while traveling. Is this going to work?

@miodice3 3 жыл бұрын

It'd finally hit me that you may be the "Tim the tool man" of our generation

@martinmiller7623 2 жыл бұрын

Lol I'm 65 watch that generation gap stuff it may cut both ways.

@tonypearson3392 2 жыл бұрын

Great video!!

@tadgyro Жыл бұрын

Awesome video. video. It would be great if you could show how to make that a 24v battery for use in 24v systems.

@winstonfoto6505 3 жыл бұрын

Brilliant video!

@tedz74 3 жыл бұрын

Great video David! Thanks for tearing this module down for us. Did you determine if the balance board (BMU) was active when not plugged into the higher level system? Also, since you scrapped the BMU could you salvage the mating connectors fron the circuit board and solder those to the new BMS, thus avoiding having to tear into the factory wiring?

@DavidPozEnergy 3 жыл бұрын

No, I never did test to see if the BMU was active while it sat there. I've spoken with computer guys who install this type of system and they tell me "no". But I can't confirm it one way or the other. Could you salvage the connectors? Sure, I guess. But then I'd still have some jumper wires coming off to go to the JST connector, which is the one on the BMS. So I guess I don't see the point. But to each their own.

@denverpecan 3 жыл бұрын

David, Your videos are always so complete and clear. A question you may be able to give me some guidance on--I am completely off-grid and currently use 2 ea propane 5,000 watt portable generators giving power at 30 amps and either/or 120 or 240 v ac single phase. My goal is to purchase some thing like in this video but I need to have an inverter (I think) to transform voltage to allow use of pumps and motors at above conditions. My use is nominal 8 hr/day at 50% of capacity (wattage) and 10 hr/dy. Until I can get solar I plan on having making the battery source transportable about a half mile where I can access power to recharge from the grid. Your comments are appreciated--thank you.