Campervan DIY battery build HUGE POWER!
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- čas přidán 14. 06. 2024
- Lithium Titanate Oxide battery build
Around 9.5kWh capacity LTO chemistry
The battery pack was designed so I could have started off with 55cells (5kWh) and later expand it by slotting in upto an extra 44 cells at a later date (when I had more coin), I managed to come up with the coin for a full pack for the build.
Batteries seem solid, although I have seen occasional reports of these batteries venting online. I'm not sure if it was from abuse or design/manufacturing flaw. Will keep you updated with performance of these.
** am thinking about doing a group buy from a bulk distributor to get the cells at a discounted rate - let me know if interested**
(Update 28/10/20: I have had problems contacting a supplier that I purchased my batteries from. I managed to get hold of them today. The person I dealt with had left so my emails were going nowhere. If you are interested in a group buy for significant discount get in touch brendonsbuilds@gmail.com I will be going through the details of this with the supplier this week and will be in touch).
Affiliated aliexpress link: unfortunately the ali store I bought mine from has stopped selling these cells I have found a store with good reviews and linked below. (be aware that a lot of Aliexpress stores sell reject or low grade cells). Please let me know if you have any trouble with battery capacity from this seller, and make sure to apply for a refund.
s.click.aliexpress.com/e/_9wWCJp
Another store with good feedback - although they have only been operating 6 months or so. If you purchase from there please test cells and let me know if they are meeting capacity and obviously get a refund if not.
s.click.aliexpress.com/e/_AAoic5
Affiliated link to Internal resistance meter - needed to check cell internal resistance of cells before assembling pack. Will make a video on this.
s.click.aliexpress.com/e/_9fmV80
Part files: goes without saying... this is not a proven or tested battery pack design, little care, no responsibility.
BUSBAR as tested and shown in video made from 4.5mm thick ali machined - but could be laser cut. Clearances are tight so may have to be opened up if laser cut.
drive.google.com/file/d/1ErHT...
BUSBAR - slotted from either side, not built or tested. It has slots from either side so that any cell could be changed without having to pull the pack apart:
drive.google.com/file/d/1R0fM...
BUSBAR brackets, I machined these from Nylon - tho they could be printed (not recommended) have to be aware of creep in plastic on mounting points etc. All cutters are intended to have a 0.5mm corner radius on them to reduce the chance of splitting over time. This design is slightly modified from the video to make the brackets more rugged.
IGS file: drive.google.com/file/d/1GldL...
STL file: drive.google.com/file/d/1JEL3...
Music: Erik Lund - Tokyo Sunset - Jak na to + styl
A man after my own heart. I’ve owned 2 Unimogs, for beekeeping. Built lithium titanate battery banks and have only high school education. We are like brothers who have never met.
Whoa... 2 unimogs! Cheers.
@@brendontait6968 must have big feet and wide hips
This was actually the very first of your videos that I've watched and I have to say your presentations are, without a doubt, the very best I've ever seen. For a high-school dropout, you seem to be rather well educated and articulate and master of an astonishing array of skills. By now, I've watched everything you've filmed and published on CZcams and am eagerly looking forward to your next piece. Thank you.
Hey Bob... thanks so much for the comments and compliment.
"If you ARE stuck in the amp-hour mindset, change it..." 100% THANK YOU!
I agree with you.
I would just design 25% over my needs and call it good with any battery
why? it's a good podcast..
You are not a drop out. You are a craftsman. What craftsmen have done for centuries.
I still dropped out, so technically am! It doesn't concern me in the slightest tho... am glad I did, and should have dropped out sooner! Cheers
Ha!! Starts video with, "yeah, no formal training, just muckin' about" - then builds the best engineered battery pack YT has seen, Then corrects misconceptions about LTO battery chemistry. Definitely subscribed, great video, thanks M8!!
haha, thanks Frank
Just goes to show you that genius doesn't require a diploma.
A Badge and Seals don't always comply with the best Tuna.. Nor Good taste. Sometimes you need to go to the dock where the stuff is pulled from the ocean kudos! Hah!!!
Frank Brants , yes, the best argument showing how high school messes up your brain.
If he had a diploma he would be doing the same thing as everyone else!
Was heading to bed, came upon this video and saw "yet another battery build" - can watch later. Then you mentioned LTO and I just had to watch it right away. Really impressive build on a chemistry which isn't very well covered. I was even more impressed as I watched on that you did the tests and they actually came out to be 40+. Wasn't expecting that. Good stuff!
Hey, thanks for staying up! Glad you enjoyed
As an electrician, I appreciate your engineering skills. I do have a couple of suggestions: Best to use copper bus bars. If not, use tin coated aluminium bus bars. Aluminium oxide, which forms very quickly on bare aluminium, is very resistant to electrical current. The star washers you used may save your bus bars from melting by piercing through the oxide coating and providing a decent (not optimal) connection to the un-oxodized aluminium. Tin coated bus bars are protected from oxidation by the tin. The last option would be to sand the connection areas and use a non-oxidizing electrically conductive grease on the aluminium. This grease can be purchased through most electrical supply houses and many hardware stores. I would also use lockwashers on the studs along with nylock nuts (and no thread-lock compound, but anti-seize compound). When aluminum under compression connections is heated, it will ooze out of the connection. Then when the connection cools, it will contract, leaving a small space between the connection that allows oxides to form. Aluminium wire must be re-tightened every 5 years to accommodate this issue. Copper holds a memory of its shape and will expand back to its original shape instead of oozing out of the connection. The lock-washer will provide compressive force to the connection that will expand to prevent loosening over time, a must on all battery connections. Or better than that, use a bellville washer. It is used to make electrical connections. It is very slightly cone shaped and made of spring steel, so it provides the best expansive connection to make up for thermal expansion and contraction. But they are very expensive. I looked at building a similar system for my home, but went with used Tesla batteries for now. I would assemble them like so: Battery cell---Anti seize compound on stud--Stainless steel nylock nut---Stainless steel flat washer---No Ox grease---copper bussbar---No Ox grease---Stainless steel flat washer--bellville or stainless steel lockwasher---anti-seize compound on stud---then finally, a stainless steel nylock nut. I would use the same system for aluminium bus bars. The nut on both sides of the bus bar is to prevent the stud from putting tension on the cell. All my best to you and your system. You are very correct to look at cost per cycle instead of just cost per kw hour capacity. You will pay more up front, but a lot less in the long run.
Thanks for your comprehensive advice. I didn't use copper because it would likely have cost close to as much as the cells and then have many points of dissimilar metal contact. I appreciate ali can be problematic with the oxide layer. Each point of contact was lightly sanded and had a light coating of grease (not conductive - but have previously found non conductive grease works fairly well). Am hoping the relatively low currents through each connection will mean low stress and a lack of issue (optimism at it's finest). If for eg I'm pulling 3kW, it will be pulling around 15A through each cell connection. Cheers, let me know how your tesla system works out for you.
What if he used standard copper pluming pipes 15mm diameter 1mm thick? flatten them with hammer = 23mm wide, 2mm thick, is that good enough? they are affordable , seen many people on YT make DIY Battery Terminals out of them, would it work for his applications? in fact I think maybe he could just retro fit his existing busbar (if this current system allows for 24mm length expansion), he just needs to buy 3-4 pipes at 5m long cost around NZ40 (USD28) each on trademe.co.nz
@@leoncryp8182 While it will work, it is not ideal. Copper pipe often uses a slightly different formula than typical copper bar and sheet stock used for electrical in order to maintain stiffness. The process of hammering out the copper tubing can also cause the copper to crystallize. This is the same as if you bend a copper (or steel) wire back and forth enough, the metal will eventually break due to crystallization. This crystallization also creates a very high resistance in the copper. This is why one is required to use stranded copper wire for flexible connections or power cords. I have seen solid conductor building wire catch fire from being misused as extension cord material. Seems like a lot of work, when you could buy the sheet copper online for not much more. The dangers of getting a battery system wrong can be catastrophic.
@@GoCoyote Thanks for the insight, buying proper copper sheets sounds like the way to go, what if you had a small project and and some pipe lying around, burn copper with a touch? kind of annealing it or something, would that relax and soften up the crystal structures? seen people do that to bend copper and aluminium, heat then bend slightly, heat again and keep bending, gets very nice smooth bends
@@leoncryp8182 I apologize, but that is beyond the basic knowledge that I have. I often tell people that I have a lot of (hopefully) informed opinions, and hopefully, some facts. One my apprenticeship instructors told us that there is no way that we can memorize all of the information we need to know, as knowledge changes all the time. The thing we need to be able to do is know enough to be able to know that you don't know something, and that there are resources to give us that information.
Wow that Panasonic cell went from zero to spastic in no time. Never seen a reaction like that.
Forbidden beyblade
Thank you for explaining the importance of using watts vs amps for your power bank/ draw etc. It amazes me how many people are stuck on amps when there are many different power systems.
Hey, no problem, yeah I'm amazed too!
The details were very nice, right down to the preferred bolts. Much appreciated.
Mate, there is a reason you have 'no formal training', you are simply self taught better than any university could do. Thankyou for the education you provide.
Cheers mate
bingo... same here... high school dropout, zero college, six figure salary. According to all the debt laden diploma's I should be flipping burgers if I am lucky. If a person wants to learn very little is going to prevent them. I have found my standards for education exceed that or formal education by a significant degree. I am never sending my children to those clowns!
I have no idea why your channel popped up, but I'm so glad it did, one of the beat videos I've seen regarding this kind of stuff. Was such a wonderful video to watch.
Hey Kenneth, I'm glad it popped up too! Appreciate it!
Brendon, the type of guy that challenges the great Will Prowse and shows his calculations! Plus you add the structural components to make it a complete off-the-shelf package. Subbed!
Thanks Jim
@@brendontait6968 Hi, great video, thanks for the clear explanation. I’m researching building a small, lightweight electric driven boat and these batteries look more attractive option than 18650’s for so many reasons. Way heavier than petrol of course but I’m sick of the fumes and noise. I live in Ōhope, BoP, NZ so I’m particularly interested in your supply and shipping costs and challenges. Following your link the shipping costs appear to be quite high. What was your experience? On the loctite front, I use the low strength version (222) for this type of application.
Thanks, yeah I was going to do 18650s for the truck, but after looking on some Facebook pages where I've never seen such a large collection of burned down houses in one place I decided to go a different route. Battery freight to NZ is an absolute punish. I still have some for sale if you want to buy from me, flick me a message on insta
czcams.com/video/iOBSxEqXUQc/video.html
Never realized there where proper fireworks in my old laptops. Thanx!
No stress
you're probably joking, but be aware that the fumes can be highly toxic and caustic to your lungs.
@@w0ttheh3ll Would never intentionally overcharge or expose a battery. Hell, I turn in my prius bad cell for recycling after replacing the bad modules. Thank you for looking out for the less intelligent on the internet though.
My first and only, lithium battery explosion was some 8 or 10 years ago! On a homemade battery pack! It happened during charging! At that moment I had a cat in a transport box, not even a meter away! It came from the vet shortly before the episode. The transport box, literally saved the animal.
Fortunately no physical injuries occur to the cat! But the poor thing was visibly shaken! By having several cells bursting/exploding into flames, in a rather spectacular way! Some parts of the cells hit the ceiling! :-o
Also luckily when it happened I was quite close and could react very fast! Throwing the entire unit to the outer deck and into the snow! Which literally saved the house... In fact I had been most of the morning out. It would have been dramatic to say the least! Old wooden house (rented), with carpet floors and wallpaper! You get the picture! In spite of much washing and scrubbing, the wall always testimony the episode! ;-)
NEVER underestimate the destruction power of a damaged battery!
Cheers
@@crpth1 Improper charging setup on cells without protection circuit?
I find coming back and watching the machining in this video to be therapeutic. Excited for your build!
Have you decided to find a different battery load tester?
Hey Levi... hope you guys are well. Yeah I find watching the machine hypnotic, maybe I'll put some more in my videos. Thanks... yeah I have a few update videos to catch up on, but have been away for a decent trip in the truck and absolutely love it!
Yeah, but it took two more purchases to find one that kinda worked!
@@brendontait6968 - what did you end up with? I’ve been trying to decide one for testing 18660’s and other small cells
18650s? I use the Opus BT-C3100 for smaller cells. Works well, they can crap out with heavy use. (I've put around 1,000 cells through one) else I've linked the current larger one that I use on my cold testing video.
Your home insurance company watching this video like 👀.
You are doing great work. Thank you for uploading these videos, I am learning new things.. Cheers!
Your analysis is the most complete and logical I have come across. Thank you, well done!
Thanks!
Outstanding video! Love that you dropped out of Hugh school and have still managed to educate yourself so well ;)
Got 1 minute in and knew I liked this guy... haven’t watched the whole
Video yet but something tells me
I’m gonna taking this advice.
Some people, just have a flair for cutting through the bs.
Hard to find these days!
Cheers dude
Thanks Jacob... but this battery is kinda new to me so don't trust everything I say!
That was a great episode Brendon, thanks very much for sharing your research:D looking forward to more!
Thanks Vik, I enjoy doing things differently to how most people do. Not everything is going to work, but it's a good learning experience.
Lots of good info, much appreciated.
Especially the proper value of batteries as rated by power and cycle life.
Thanks - will deff try to get as much info into future videos as I can
Holy crap, this guy is amazing! Workmanship and skills are out of this world. Much respect to you, Mr. Tait. Subscribed.
Thanks so much Amo
Can't wait to see what you've got to show us! Thank you very much for making this content.! I'd really like the solar power solution content you've mentioned. It's a jungle out there. You are really good at explaining things, i understand it with my electronics education from highschool. Thanks please keep them coming!
Cheers lorenzo
Good job Brendon! Thanks for taking the effort to make this video, it was helpful. I am pondering a battery design for my boat to replace the generator. New Hampshire, USA.
Glad it was helpful!
I thought I knew something about campervan batteries ... Until I watched this video. Brendon you set the bar high. Thanks for sharing this knowledge
Just scratching the surface, I'll go into more detail on diff batteries in future vids. Glad you took something from the vid =)
Awesome LTO build, very informative with excellent mechanical considerations for battery cell, thanks for the info on RTE, I was a little concerned and hesitant after watching others!
Thanks David
I saw the thumbnail and heavily considered ignoring it "just another electrical video of more of the same". I was dead wrong. You sir, are exceptional! I'm also an autodidact and everything I know, I've taught myself so I can relate with you and also, you have my respect. Those are some amazing fabricating/machining/electrical/planning skills you got there mate! Glad I clicked on this video, looking forward to seeing more content from you :) Edit: That battery array turned out absolutely beautifully.
Hey Andres, thanks so much for the compliment. Cheers
Awesome video! I'm still years away from my LMTV build and this is great information!
Make a start - I'm just piecing it together bit at a time. Have no idea what will work and what won't yet
This is one of the best and well-thought battery packs I have seen.
Thanks for that!
Both your practical and technical knowledge are impressive and more importantly to us all, Appreciated! Lost my Bro this year (60 years old), who was accepted to college at 15 and electrical and mechanical wiz. He was my go to for all things related (and truly would appreciated your knowledge and approach), we walked through more of this the past years plus, and appreciate those who (like you) post such information and support such a personal loss of go to knowledge. Thanks! Subscribing.
Cheers David. Sorry to hear about your bro 😞
Really glad you showed that battery test fire!!
That was awesome ... I had no idea it had that energy
Perfect length very good watch lots of reasonable information. Thank you for the great insight!
Thanks
Very interesting video, I like that you considered things like expansion etc. I'll be watching for more information especially on charging regimes and bms system.
Thanks, coming soon!
That was a great explanation regarding the LTO battery chemistry. Very informative and fun to watch. I’ve been thinking of ways of making a similar battery pack (48V 22S) but using the LiShen LTO batteries. Your design was so simple, compact, symmetrical and used minimal parts. Excellent work!!
Thanks for that Jamaree
Well done brother and a brilliant build I'm super intrigued with this lithium chemistry and the way you went into detail on the cost, durability, life expectancy was well explained thank you
I'm still learning and plan on building my own battery I also have a bus conversion with a 24 volt charging system and have also gone back and forth about 24 volt over 48 volt and with all said it is more cost effective to go with 48 volt because I've heard nothing bad about 48 volt systems and tons of DYI builders say I wish I would have gone with 48 volts that's good enough for me.
Anyway thank you for a great video and look forward to more on your builds.
You read my mind; background and qualifications! Yes. Thank you.
wow, very cool. I'm subscribing to keep up with the results of this.
I've been looking at incorporating this into my home backup instead of 12v lead acid. Cool use!
I loved the CNC machining, one of the best youtube videos I have watched, very well done, thanks
Glad you enjoyed it
I have only watched to 6:35 so far but I love how You have allready told me You have no prior qualifications and also demonstrated how your design is based on in depth understanding of physical and chemical properties of the subject matter. I feel like the World missed out when it did not give you a engineering grade and a research job! Wełl done M8.
Thanks... don't forget to watch the rest
I love how after punching the hole in that battery, he didnt talk about nearly shitting his pants.
Very informative Brendon thank you. Trying to work out what to use in an offgrid battery for a house in the UK. Never really come across LTO before as most people I talk to are trying to sell me something and LiFePO4 is an easier sell/profit for them selling to people who aren't curious as to choices availible and long term efficeincy and cost.. If possible I prefer to either build whatever I can or at least fully understand how it works, so your video is just perfect. Simple explaination, easy to check up on what you are saying, so thank you. Education is what I do and I enjoyed being educated by your video.. Cheers
Dude, what a pack, awsome, and one of the best, informative, educational and presented videos ever!! Very many thanks.... hitting the "all" bell was a no brainer...
Thanks Nick
Holy shit. You're frigging awesome. I'm in WLG, was just about to hit the buy now on Trademe for a 200AH Lithium. Problem for me is the safety, I've had experience of LiPo's catching fire in RC car builds... I'll email tonight.
these are insanely safe !
Woah!! well now I have to go find batteries to puncture! That was amazing LOL
you might as well stand next to a huge firecracker
but you shouldn't
Thanks for your hard work to build,test and prove use of this battery is possible. I will seriously consider making up a system for my home as the cost is far less than a Tesla unit and longer life. Kudos to you.
Thanks Kim, It was a big risk as I had previously not had experience with these cells. Am happy with how it is working
This guy has good info...BETTER than the electricians I've seen.
Common Sense > Traditional Schooling
As someone who studied engineering in university, I am genuinely impressed with your knowledge of engineering principles (expansion/contraction, bending moments, and so on).
Cause he just dropped out of school, not stupid. Society is so misleading.
@@jasongrinnell1986 Most people who drop out don't have the time or energy to educate themselves to this degree, so it's still pretty surprising and interesting.
Worth praising Mr. Tait for.
@@jasongrinnell1986 if my comment made it seem that I am of the opinion that drop outs are stupid, nothing is further from the truth. I dropped out of high school myself, because I was bored with high school classes and frustrated at the slow pace. I simply studied the prerequisites for structural engineering independently and wrote the entrance exam for mature student status. Also, intelligence is, in part, irrelevant in this case as one would still need to spend the time and energy to gain a reasonable comprehension of the aforementioned engineering principles.
@@waiqiao6875 always depends on that persons passion
Thanks Eric
Excellent rundown, and great project. Thank you for letting us in on the process
No worries!
Wow, I really love that build.
Awesome construction. No BS just telling it as it is. Your honesty is so refreshing. Naturally I'm subscribing. Well done.
I appreciate that!
Great video thank you, every day is a school day 🤙🏼
thanks for that excellent video bro....you're THE MAN when it comes to self built battery packs
Thanks Donald!
There may be no letters after your name but you are very smart and common sense you cant buy. This is truly one of the best no nonsense videos I have seen, extremely logical, and very well explained. Thanks so much I am definitely going to replicate your build. You are also a joy to listen to, looking forward to watching your other videos. Keep it going.
Cheers Adrian
The information in this channel is giving me an addiction. #invaluable.
So glad to hear this... thanks!
For a highschool drop out you are doing some kick ass engineering!
Thanks - a lot more to come!
Schooling has zero to do with intelligence.
@@markfisher8943 considering Einstein's third gr teacher said he was too slow to be in her class. His mum kept that stupid letter from him and taught him herself.✌️
Love your channel and presentation (and the warnings during 'testing' phase) ;-) Not difficult to see you are above average intellect and not afraid to go after what you believe in. Thanks for sharing!
Thanks Sam
@@brendontait6968 bro are u still in new Zealand?
Yup yup
Keep up the killer work man this video was amazing! Thank you!
Cheers Brandon
Great build. I have few of these cells and wondered about how I can package them together and you gave me some few great tips! In general in automotive application, LTOs are not so popular in most builds since kWh per Kg in power density is where these are far behind compared to other Lithium chemistries. I worked with these in City Buses where they may have a short range like 50-80km but have dual charging port to pump in as much amperage (8-10c) in for 5-10 minutes and go another 50-80km - it was pretty sweet to see them work. LTO (Altairnano/Yinlong) is an odd duck that has some interesting applications. They do degrade about 1% a year and also wants to be charged with high amps if you want to them to perform well. Share more about your experience with BMS and other related things. Thanks for sharing. Subscribed!
thanks!
we can provide yinlong lto battery for you if you need
That was great! It reminded me of a 4th of July "Ground Bloom Flower."
Exactly
Sounded like one too. And it was constructed like one with how the hole made was just off center to the tube shape of the thing. Guaranteed that there was a lot more energy in that spray than there is in one of those cauliflower things. I did not know that they got that angry.
Now THAT was worth the price of admission. Thanks very much for sharing your knowledge!!
Cheers Owen
That was incredibly detailed and I am very appreciative thank you very much
very informative, Thank you!
thanks for the comment
Holy Sh^T Someone is finally doing it! People have been waiting for this for a lonnnng time!
thanks! am into unique builds, learn so much more than just copying what everyone else does
@@brendontait6968 A commendable attitude. Although sometimes other people have just worked out good solutions worth copying.
Thanks for being straight forward and to the point and adding no fluff.
Cheers Scott
Cool camper! Been watching you/LTO tech almost 2 years!
that puncture test was impresssive!!
Right?!
what a powerhouse !
Awesome video Brendon. Well presented.
Thank you for sharing some great content! Very informative..you sir, have the mind of an engineer! Wishing you peace and prosperity from Boston...
Thanks for covering this. It would be interesting to build a 48 volt pack
Might just do that
I really like how you ended the presentation, telling us what you would have done differently. When I saw the RED thread lock, I cringed because of my own experience with the stuff. I have bolts break before it releases. I was thinking to protect from loosening due to vibration, Blue thread lock would do fine.
Another issue is the use of aluminum because it does form an insulating oxide layer, but this can be avoided with the use of dielectric grease to minimize the available oxygen.
This is one of the best videos on this subject that I've seen, good information, elegant design... I also recommend reading the description, which contains some complementary information and file links.
Thanks other brother. I need to get off my butt and make more!
I love your qualifications 👊
I feel to measure the power then compliance voltage plays a massive part on the measurement accuracy, that's why some measurements at low voltage with say a current shunt & moving iron ammeter in the same circuit might give different readings due to compliance voltage & connection lead resistance, chart recorder to measure terminal voltage & current across a dc shunt with a fancy constant current load would be the answer there are proper units out there but expensive !
Compliance voltage is very important when trying to measure power or one can make mistakes say from a CT transformer using thin long leads to a moving iron meter,
Yes very impressive metalwork, cost a massive amount of £$,
I would have that sort of power in a brick shed, not in the bedroom for sure, always worried about fire risk, I rather have a purpose built brick shed or metal container,
Those batteries are really like a super capacitor.
Really nice engineering 👌
That looked awesome the battery dieing
Amazing video and I love your theory/test/check approach. Those batteries sound great too!
Thx
Awesome qualification!! I love it. Seriously. No college or university can teach common sense and street knowledge.
haha, cheers
First build I've seen where dude goes all in on yin cells
must have won the lottery before starting this project ;-)
@@marcelbron6128 He said $55 each x 99 = $5,445. That's high, but not unreasonable for a large RV battery pack.
A very nice video! What kind of BMS are you using with these cells?
I'm just using a shitty chinese BMS in a couple of weeks I'll do a video of BMS wiring and will cover it there.
Thanks
@@brendontait6968 look into the 6s qnbbms coupled with an isdt battgo for voltage monitoring. The 2 work great together.
Yay, someone who knows what they are talking about....even tho you suggest you dont. You know ur stuff Brendon. Your electrical terms are all good wrt power, energy, capacity etc etc. Nice to see another vid on this technology with lots of info. I like your video on this. Well done man.
I appreciate that! I know a little about electrical stuff (possibly more than some other youtubers) but that is a pretty low bar to reach. I want to help people learn as much as possible, but at the same time I want to be realistic about my experience and ability because without doubt I'll make some errors along the way.
to all
The passion for knowledge and the acquisition of such knowledge, has never been owned by universities or any other educational institute. The passion to achieve is almost totally driven from within. I designed my first radio's and signal generator at 10 years old, because I had an insatiable curiosity to do so at that young age
Thank your for this interesting video. I’ve got a question, I totally understand the safety matters,but what about weights? your build seems amazing but quite heavyweight, I’m wondering if it is good solution for my max 3.5T van built...
Hey, no problem.. weight doesn't matter that much for me since my truck is 12T. I guess my build is likely around 130kg. My build is based around longevity, reliability, safety and ruggedness. In your situation with weight as one of your primary restrictions I'd personally look at another chemistry. Keep an eye out, will be doing other battery builds that might better suit you.
Thank you very much for your answer. I'll looking forward your next videos then (you just won a subscriber / notification bell) :)
I was expecting a DIY build, but wow! You have ALL the best equipment and the brains to make it work. Can I just bring my project to you and write a check? :)
Thanks Michael, I didn't use red locktite - I used an equiv to blue, but am still unsure. Have updated link. Thanks
@@brendontait6968 - Michael? I think you responded to the wrong comment. 😎
Sorry Erin... I noticed something on my computer getting messed up after I commented on a few comments. I should have refreshed the page before I replied. Thanks for the comment btw. Unfortunately I'm quite time poor at the moment!
@@brendontait6968 absolutely not a problem, it’s all good!
Just found your channel, subscribed. This video was a great effort. I like your style. Hope to see you building battery packs for customers soon.
Thanks for the sub!
Now I'm aware of these batteries. It was my first knowledge of these. Be Well, J.Q.
Glad you picked up some knowledge
Haha first I was amazed by the engineering that went in to your bank so clever, then I was thinking ooh camper van on the beach this guy is brave, then I saw it was a Unimog and hit Subscribe!!!
Haha, thanks! Unimogs deff have their appeal. To coin a phrase tho... owning a Unimog is a bit like having an erection and a migraine at the same time!
@@brendontait6968 Don't know where to put your hand ? Hold your forehead or ... ?
.....your hard-on ???
@@brendontait6968 well that phrase can be wrapped up into one word, viagra!
@@brendontait6968 Okay, I'm going to write that one down!
Cheers mate ! 🇳🇵
Cheers, Brendon. Really enjoyed that. Contemplating my sailboat repower and your informative, well-presented vid has helped me in that journey. Thank you!
Cheers, no problem
Guy's an absolute Friggin genius with out question !
Yes I totally agree with everything stated in this video. And I pulled the same capacity results you got on my LTO part 2 video. The toshiba cells were incredible.
The reason I still prefer LiFePO4 over LTO is due to cost mainly. LTO is amazing! But crazy expensive if you want grade A cells. The data sheets I found for my video must have been for higher c rates. Sorry about that. I like LTO more now, but man that pack you built is massive! How much did that cost you? holy cow! Yeah, ying long and toshiba seem to have the good stuff.
But I must ask, why are you building such a massive battery with large discharge and charge capabilities? Why not use LiFePO4? I would love to hear your reasoning.
Good to see you interacting with others DIY battery guys will… i take it as a sign of humble & mission oriented - so in a good way let’s have a new test and sure the overall shouldn’t be costly like other types of batteries
Cheers Will. If you recall I was the annoying internet dude who challenged you in the comment thread at the time. I've since had the chance to actually test my own bank (24v 240AH) and it delivered exactly the same result Brendon obtained.
I still think the confusion arose over poorly translated technical terms like 'discharge efficiency', which on the face of it is a meaningless term as there is no way to measure how many electrons are in the battery at the start of a discharge cycle. The only parameter that can be realistically measured is round trip coulombic efficiency, which is probably over 99%. Energy efficiency is different parameter again, and this is in the typical 95% range for all lithium chemistries. This largely relates to the slight difference between the terminal voltage on charge and discharge (at the same SoC).
That plus the very high C rate you tested at only confounded matters more. Still it did compel me to think this issue through a lot more and I'm pleased we all learned something.
@DIY Solar Power with Will Prowse
He said he got them for around $50 apiece, so x99 cells, just shy of 5k
@@ianpobanz12 $5k for 9 to 10kw that's worth it .$1k more than AGM with double usable power , plus big bounce 20,000 cycles , clear winner and safety.
SO big hahaha
wow, I didn't expect that to happen.
You built a gorgeous pack there. Very nice; a work of art. :)
Thanks 👍
Awesome build Brendon and some good tech info. with 2 LTO's I could run my Ham radio portable all week-lol.
Job Done- Well Done, Barnie.
Cheers Barnie
Thanks Brendon! Learning more and more about these. Was going to ask, do you happen to have a link to the supplier you purchased from?
Sorry, the aliexpress supplier I bought from seems no longer available. However... I have bought a second set of batteries from a bulk supplier and they have all tested great. I will be offering a group buy on these in a week or two with a much cheaper price than I paid for them.
@@brendontait6968 Would you happen to have a contact, im not able to buy in the near future, saving up for a while to buy a set later.
@@mirsidorov5112 brendonsbuilds@gmail.com
You can heat locative up with a soldering iron or some other heat source to make it pliable sos not to do damage to your batteries, neutral cure silicon is a good soft threadlocker , great post cheers for the info and your time :).
See this is what happens when you don't go to school.
You can do critical thinking on another level and get better results.
I also only did 10 years of basic education in Hungary and was running circles around Mechanical Engineers in the USA. They just can't think out of the box.
Good video, mate!!!
Thanks Veggie
I miss home ... listening to you was cool... waiting patiently in Europe to come back 💓🤙🏼
Thx... tho a lot of people say they can't understand a word that I'm saying! Gotta say NZ is a good place to be in the world at the moment.
10:10 Im with you on that burner phone for the chinese software, got some for a BMS for my electric bike and it wanted access to make phone calls and if you denied it access it wouldnt run so stuck on an old phone.
Super important post IMO, due to the CCP. The chinese people are good people but the chinese communist party is evil.
@@GoZipper You worded that perfectly. The Chinese people are good people, but in China, they are burdened by the yoke of the CCP. It is sad.