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$493 Aliexpress 45Ah Grade A, YinLong Lithium Titanate (LTO) Cell Testing
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- Опубліковано 13 сер 2024
- LTO pros and cons video: • I was wrong about Lith...
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Update: The BLS store is giving me a full refund for the issues I experienced with their LTO cells.
They said that they made a mistake and the cells were not labeled correctly.
They wanted me to remove the video, and I refused. I told them that this will be a lesson to ensure that it never happens again.
I still do not understand why these problems happen so often with battery distributors. This has happened on numerous occasions w/ multiple suppliers. Hopefully my video will teach the other companies a lesson.
Previously, I did like the BLS store, and I have bought some really nice cells from them in the past.
I am glad that I was ripped off before my viewers were. Who knows how many people they sent these cells to. If you bought these cells, test them and return them if necessary.
~~~~~~~~~~~~~~~~~~~~~~~~~~~
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If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Solar. Low prices and great warranty, and they can take your entire house offgrid with their new Powerwalls: ts.la/william57509
~~~~~~~~~~~~~~~~~~~~~~~~~
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Contact Information:
I am NOT available for personal solar system consult! If you wish to contact me, this is my direct email: williamprowsediysolar@gmail.com
Join the forum at diysolarforum.com/ if you wish to hang out with myself and others and talk about solar
FTC Disclosure Statement and Disclaimers:
Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :)
DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program,
An affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com
Thanks for the reveal. Sounds fishy to me. I think many battery companies do this.
I doubt they would admit that to anyone else...pretty hard for them to defend after all the testing You did.
Thanks for that, so you can ignore I bit of my last post.
You are Epic.
Yes, let them learn from this, I hope you don't have to pull the video down.
I've bought all my 40Ah cells from there, kinda weird that those 45Ah are grade B's and 40Ah are grade A's. I have same capacity tester you used earlier, thanks for the link btw, and got 42Ah out of them
Thanks for the Vid and NOT Taking it down !
Such reviews are Lessons for vendors & customers too.
Any frauds / misrepresentations intentional or not must be put into the open for everyone to know it is happening.
Out of curiosity.
Do the date codes match ?
Production codes printed on the cells ?
Is it possible that they are New Old Stock that have been laying around in a warehouse for a period of time ? Should not be a factor unless something happened in storage, freezing or ?
LTO is favoured for transport applications - like trains and light rail where regenerative braking gives high charge rates. And also the high cycle life is very important. But as you say, these are not requirements for solar.
so I take it on a catamaran with regen capable props this would be the chemistry to use, plus the safety aspect is important too, plastic boats are highly flammable
What about audio
I need help guys but please someone who truly understands it 🙏
8k RMS system in the car going ✅
I have 6x 45ah
Can I simply delete my car AGM battery 🔋 with still running OEM car alternator (120amp )
And just use 6 x45 cell bank instead + BMS
Can someone please tell me the correct way using these cells in my car audio project ❤ thank you 🙏
Will, your info is always so helpful and it takes a lot of the guess work out for us rookies. Much appreciated.
Also, calendar aging seems highly unlikely for these cells as most researchers on calendar aging agree that the cause of calendar aging is the graphite anode which isn't present in a lto battery
Oh good point. I did not think of that difference.
@@WillProwse where did you get that 6s lto bms? ive been looking for weeks. i have 2 bms that arent the right ones
@@WillProwse Hey Will, I know you haven't done anything with LTO batteries for a long time now, but if you want real 45Ah grade A cells, you can get them from an American company called XS Power. They make a lot of extreme car audio batteries, and they used to have lots of Lead Acid batteries, but they have recently started offering rebranded Yinlong LTO cells and they also bought the intellectual property from the largest and best super capacitor company there was. I believe it was Maxwell or something close to that. They made 3000 farad super capacitors, which were very useful for extreme car audio since capacitors can charge and discharge almost instantly, and they can charge and discharge in low temperatures. LTO cells have lots of benefits for car audio too since you don't have to worry about the temperature as much as with Lifepo4. Plus, LTO's charge and discharge very quickly at high C rates. Thats perfect for car audio. Hence why they are being rebranded and sold by XS Power along with the 3,000 farad capacitors. Its a great combination to use the XS Power/ Yinlong LTO cells in combination with 2,000 to 3,000 farads of capacitors. So, if you want to try the 45 amp hour XS Power cells or their capacitors, I can say they are regarded as a top battery brand in the car audio space. Limitless Lithium is another big company that has really expensive high C rate Lithium batteries for extreme car audio. It would be extremely interesting if you did a high C Rate output challenge between the Yinlong cells, proper Grade A 45Ah XS Power LTO cells, Headway 38120HP Cells to represent high output Lifepo4 cells, and maybe 2 AGM Lead Acid batteries in parallel. Pit them all against each other in a showdown and a teardown. See who has the best high output cells in the consumer space. That would be incredibly interesting to me and about 100,000 other people who use Lithium batteries in high power car C audio builds
Hello Will, there is an easy way to tighten the buss bars properly with no danger of damage to cell. first put a nut on the threads flush with the base of the cell, you do not need to put any torque on the nut. Then put a buss bar on, then add a second nut, when you want to tighten the buss bars, you use two wrenches and the inside nut is screwed to the outside (as if you wanted to take it off), and you tighten the outside nut, there will be no tension going into the cell, you are only locking the two nuts into the buss bar. In some cases, you may need thinner nuts.
If you have to jump thru hoops to buy grade A cells without getting ripped off I'd just skip the entire brand. It's that simple.
I went with LG LTO 12v batteries, China’s middle name is scam!
@@thesurvivalist. You can say that again.
Honestly this is what keeps me on lead acid. I can walk into Canadian Tire and buy lead acid batteries, or I can buy from a solar store. With lithium it's a big gamble if you're getting something good or not as there are not many legit places to buy them from. At least not here in Canada.
@@redsquirrelftw with lead acid you can just create your own. Depending on how you make them you can make them last veeery long
Imagine having the guy doing the video know that is the conclusion and you watch the video only to find that he knew wall along they were grade "b" but had the video labeled grade "a" anyway. Dump the reviewer and the product.
glad to see you finally got a good battery tester. had that one for over a year now works great
looks neat, I need to look into one.
Great feedback. Thx. Definitely an easier way to test. I just ordered one.
I think these cells would be great for campervan and van dwellers that live in their vehicles in winter, especially in cold places like Canada. Also, the safety factor in this specific case is a huge plus compared to other lithium chemistries. Keep up the good work, I am eager to see the cold temperature test!
Thank you, thank you. I have been wanting to order some of these cells but the curiosity vanished after watching your very reliable test.
I will send you a link to another very good video which might be of interest to you...
@@nickush7512 send it to me as well pls
I m so glad that someone like you are testing and exposing fraudulent battery suppliers. Thanks for the info...
Thank you,! This technology is of great interest to me as I winter camp in northern Minnesota.
That's wierd Will, I have the 40ah LTO grade B cells on my electric motorcycle pack and I've capacity checked them but still got the 40ah capacity. I've since swopped to 32650 6ah 3C lifepo4 cells. 332 of them lol. I'm falling in love with lifepo4. I mean if I can get up to 6000 cycles then that's perfect, even after that I'll still have 80% capacity. Also the reason there is so many grade B cells is because the Chinese use the LTO on applications and probably are required to swop them out after a certain time period, this is especially true for medical and public transport applications. Instead of throwing them out they sell it to us. That's my theory. Thanks for the vids!
How is your LFP holding up after 3 years?
@@dahrafs9798 still going strong!
Sounds like a great solution for boats in northern climates, especially where the temps in winter go far below freezing and the boats are kept on the hard with no heating.
Winters in the south get very cold too. Take a look at Antarctica if you want proof.
Then again You don't charge when it's cold.
I'm thinking another possibility is they may be grade A cells rated for either 35 or 40ah but just marketed as 45ah cells
Sounds about right.
Yeah lots of compaanies do that, over-rate their product.
Especially chinese companies....
@@joewamsley8004 copy that.
I've gotten so used to ragging on china and thinking they are dishonest I keep forgetting the incompetence and hubris. Haha. I know a lot of people that went there to help them get plants working. The Chinese just assume they did it right, without validation. It wouldn't surprise me if they thought these were really as specified. I seem to remember a CPU manufacturer pumped a few billion into these great micros 98% failure rate... now they sell the originally 16 core micros as 4-8 core and they still haven't worked through the backlog.
Thank you for your work. We need more people/teachers like you in all industries. Keep it UP!
Let us know in 20 years how they're holding up!
From link, "If the weight is not enough, it is very likely to be 35AH or 40AH". Did the batteries weigh as much as they say in the link given, 1260g?
sub
Is riding 45 on battery
Sadly 90% of Ali's sellers are scammers, either they are selling B grade instead of A, or they are lying about actual capacity.
Aliexpress is a basket of crabs.
Thanks for all your test.
Great video as always. I suggest to use a 2nd nut to connect BMS wires etc. to assure full pressure is applied by the 1st nut towards cells and bars. Especially with thin and/ or soft cell connectors.
My Yinlong LTO 40Ah has exact 1,236kg. Measured actual Cap. is 43,6Ah. Since 3 Year in use for Solarenergie.
Twice I accidentally unloaded these cells to 0 volts for several days. Cells are still new, better than 40Ah. Great Cells. I have pay 15 Dollar for each cell in 2018, have 132 pieces.
From where
@@alexyoung8983 OSN-Power. Price is now $40 😞 5 years later
You’re too hard on yourself! You didn’t “mess up,” this was simply a false listing.
@@chasmarischen4459 Not sure whose advice that is, but I always thought a healthy person should calmly look at the facts first before assigning any blame.
What about the fact he knew they were not grade a and still posted a video saying so just so you watch it. Clickbait.
The reason you can most likely just to get grade B is that Grade A normally do not sell in retail pack. Normally if you want to get a Grade A cells you need to contact the battery manufacturer directly, and in China there are many recycle battery and they put it on Online retail sales (as recycle one has greater margin).
But if you are buying so small amount I don't think you can get much response from manufacturer
LTO battery also has very little demand from the customer market, so it makes it even harder to get a good one
Thanks for the video Will. I was board and looking at battery hook up web site and saw the prismatic lto cells. I haven't owned or worked with this kind of chemistry of lithium. I was impressed with the cycle life and that it might out last my life. I'm 49 years old. I wanted to learn more before I bought any of them. That's how I found your video. I noticed that you made it 5 years ago. Have you thought about making a new one with new information that you may have discovered or learned since then? Well I gotta go. Got solar pannel adjusting to do. I love your videos. Keep making more brother.
excellent video and as usual no animals were harmed or injured in the making of this video
Another thought I have on lto cells is even though their energy density is much less than nmc chemistry they can take one heck of a high C rate charge. Eventually I want to build a pack for a 50cc scooter converted to electric that I can go to DC fast charge sites and hopefully fill the pack in under 15 minutes.
Would love to see a video of that conversion!
Hi William, I love to watch your videos. I have dabbled in Hybrid Power Systems for over 10 years. During this video you down play the value of LTO high C rate. And for solar power, I agree. However, on a personal note, I have a Bad Boy Buggy, which is basically a souped up 4x4 Golf Cart. It has 8 each 6V 200A-H Pb Acid batteries in series and pulls 500 Amps. If I could get 100A-H of Li batteries that could handle 500 Amps at a reasonable price, I would switch over. In this case LiFePO4 cannot handle the C rate that I need. LTO is the only way to go. The limiting factor seems to be the BMS. The one you showed is good for 100 Amps. So, just a side note here, LiFePO4 cannot handle all applications. Keep up the good work.
Great video! I'm following and I agree that most people will not have a use for these cells, but they are perfect for the Ice Fishing industry in Northern US / Canada. That is what I am using them for.
The Zenaji Aeon recently added to the Australian Battery Test Centre use these Yinlong. We'll see how long they last.
Could you please explain what Zenaji Aeon is. Thanks 👍
@@AM-us7cz Zenaji is an Australian company making batteries for the home market. Their Aeon line of batteries use Yinlong LTO.
Like these videos especially LTO as an option doing a solar gate and currently it’s freezing out for the last 3 days. Thanks and have a nice day.
I really wish you a happy holiday season Will. You have helped me to help so many women out here in the desert. Like I can not count all the solar installs and other DC power equipment I have put in for these ladies. I never charge but I get a great feeling helping others and gifting others solar panels and solar generators I've gotten on sale or been gifted. I'm really learning a lot on how to repair charging cables and making portable panels to charge Jackery's and other devices like that.
Be careful when connecting cells in parallel like that. Might be ok at 0,1 V with this capacity, but larger cells might already produce high currents.
At work they balance individual modules of forklift batteries to less than 0,1 of a volt, as they produce ridiculous equalising currents at super low voltage differences.
“Testing in freezing cold temperatures “..
That’s what I have been waiting for.
Well done!
hes done a few
Hey Will, sorry to see you got bad results... again - Aliexpress can be so unreliable and I'm sure that many cells get repackaged... Just an FYI, my 40Ah cells that I used in my videos which all tested over 40Ah were $34.50 plus shipping. It can be so difficult to find legitimate suppliers. I did quite a lot of research before I bought mine.
Same cells? If so can you share a link for the supplier?
Please , can you supply us with a link? Or a PM will do also.
Why? Electric busses / public transport. The use case fits and China uses them a lot in the cities.
Too bad you got grade B again. Bought mine in Europe as 40Ah and they test as such.
Not sure where you got the info from that 24v isn't a good fit. I use them with a Victron EasySolar 24/3000/70-50 and that works perfectly fine. Just yesterday I ran them down to 3%, drove to a hookup and charged them within 2 hours with the EasySolar (basically there's a MultiPlus inside next to an MPPT and more).
My high voltage is 28.6 (2.6v per cell) and low is 19.8 (1.8v per cell). The Victron EasySolar / MPPT / MultiPlus inverter work fine. Every 24v load I've put on it works fine too. Never had any device complain about voltages being either too high or too low. 33 cells in 11s3p 40Ah each, total 120Ah in 24v. I get ~3000Wh at +97% efficiency from them, measured over and over again. 1560Wp solar on the roof. Been running this system for almost a year and use them every day (as I live in my van).
It has been freezing here last week. I was not worried and nothing happened. Other van dwellers around me had all kinds of issues with BMSs of LFP systems shutting off, AGM not performing to satisfaction, etc. Me, no problems at all except for no sunshine but that's normal here in winter time.
@@SystemsPlanet send me a message on Instagram or Facebook: @vankensteiner and I'll hook you up
@@SystemsPlanet it was me, still like it
I'm glad you're back on line man!!!!👍😎
As someone heavily involved in the car audio side of LTO cells I haven't personally ever seen 45ah cells.
Only 35,40, and 55ah. I'd assume you have 35ah cells if they're Grade A at all.
Will, you did it again, created a great succinct review of a battery technology. thank you!
Thank you for taking the time and working through proper troubleshooting progressions. It is a bummer they're grade B, and I'm looking forward to some grade A action!
Yo Will! Something seems a bit off with the frame rate / shutter speed maybe.Try bumping your shutter speed up to like 1/60 and adjust ISO to taste / ISO auto.
these would be great in my electric tractor project
They're terrible
Thanks for the share
electric tractor? I'll take "Projects that will never work for $100, Alex"
@@dansmith6990 you know freight trains are electric right?
When you hook the cells up in parallel without matching the voltage between the cells using some form of current limiting couldn’t that have damaged them. They could have dumped huge amounts of current instantaneously to match the cell voltage.
That's exactly what I thought! I would use BMS to balance cells or high power resistors.
They were close enough in voltage that is very unlikely. Also if that had happened we likely would have seen sparks - we didn't. I think the most likely scenario is these companies are selling used cells.
How have to have thicker wires on your capacity tester. The voltage drop will be to high on the wires you now and you will have some heat related power losses that will affect the measurments. If you have 0.1-0.2 Voltage dropp in the wires with 5 apms discharge then you will loss 0.5-1watts, in 8 hours that will take to discharge the battery you will loss 4-8Wh or 2-4 Ah. I think that it will be a good think to check your testing setup.
Love your content! But just a bit of criticism - please don't top balance by bus barring together. The inrush of current in low resistance cells could be momentarily 1000's of amps. Its best to charge the low cells with a conventional charger so the 3C charge limit is respected.
Oh absolutely! But the voltage differential was low, so it was fine to do it this way. Usually I do not do it this way. I have a few videos stating what you just said.
You nailed it by mentioning the fact Lifepo4 is the way to go atm as by the time good Lifepo4 cells have reached end of life, solid state battery’s will be available
Nice, can you do a video on Sodium Ion batteries?
How does the refund process work with Aliexpress... dosn't look like your sending them back, are they just refunding you partially ?
Hi there,
Firstly great video,
Just to share,
YL company itself does not officially sell on any E commerce platforms.
I deal with YL directly( not distributors or resellers) and just got a batch of 45A cells.
Glad you got your refund!
I would like to see something about the use of a solor and wind hybrid system,
Like the pros and cons of that type of system
I still go for lifepo4..im using cylindrical lifepo4 for my solar set up and i love its performance..
Just a hypothesis, maybe if you empty the battery in a longer period of time, only then can you get the full capacity, like what happens in a car. Quiet driving enables you to cover a longer distance with the same amount of fuel, unlike sports driving. what do you think?
If I buy 6 YINLONG batteries and join them in series to get about 15 volts with an S6 balancer, if I put a charger that gives 15 volts and 160 amps could I charge this kind of lithium battery??
hi, i work with battery suppliers from china for about 5 years and if talking about LTO cells - there is lots of interesting stuff hapening with such cells in china and it's very tricky to get exactly what you need, first 45ah Yinlongs cells i got about a year ago and on 2C test (my single cell tester only can handle up to 80A current) i got around 46.1-46.4ah and they aint cost that much in china mainland, the price is around 30-35$+shipping, quality depends only from suppliers good faith, because if we`r talking about Yinlong products - there`is no A grade available on the market and never been, only B and C grades. The only A grade cells i could get is that one i bought from Yinlong directly, but that is comlicated even for wholesale byers ;)
You didn't mess up. It was a learning experience. Battery companies are very misleading and that won't change any time soon unless people learn how to catch them.
DUDE, YOU ARE SO ON TARGET. HOST THREE MORE YT CHANNELS, PERSONAL, DIY BATTERY, ANYTHING YOU LIKE. YOU ARE THE KEY, TRIPLE YOUR WEB PRESENCE. TRUST ME.
Hi Will, I managed to overcharge my LiFePo4 cells to 4.1v during top balancing. How should I proceed? Should I put them in series and pull a load to get them to 3.6v and then install BMS? Are the cells now damaged? I appreciate any advice and thank you for all your informative videos.
They stabilized at 3.8v which is a bit high, anyone else have any input?
Just pull them down to safe range, and that's the best you can do. Worst case I would expect some capacity loss, but they should be ok.
It can be useful for solar power as PEAKER storsge when the sun only shines (peak) for 1-2hrd hours a day. at maxium (10 c) you can store 5KWhr of energy in 10mins.provided you have a lot of solar panels. At that rate you could charge your entire battery bank in no time and use it for the whole day.
that used to be a lot cheaper but they cost that much now because they are widely used in car audio which drove the prices up wildly. and High C rates are needed for car audio.. so they are super popular in car audio right now
I think the cells are fine because Yinlong makes 40 Ah cells. I think the seller overstated the Ah to make a sale. The batteries may have been re-marked to say 45 Ah but they are likely 40 Ah. Check the Yinlong website.
I checked the website and the 45 Ah are slightly heavier 1.25 vs 1.22 kg. Maybe you could weigh the cells.
I have only seen 40hr and 35hr Yinlog cells. I have a 120ah bank and I could not be happier. I am using them in a car audio application, but don't knock them yet.
Well done Will. Us beginners appreciate you knowledge
What about using a 6s battery for a starting battery in a car? With the alternator voltage well below the max voltage of the cell, using a 6s without a bms seems like a decent alternative. At least as a project. Am I missing something that would not make them ideal for that? I can forsee having to check the balance occasionally, but the voltage range they would "live" in would not put them in danger.
Yes! I planned to mention that in my notes. That would be a great application for this chemistry. Your logic with voltage of charging system of ice vehicle is true. It works great
@@WillProwse and I would imagine that cold weather would not affect the cranking amps as much as it does lead acid (from mn so the cold is a big deal) looking forward to the freezing temp discharge tests when you get grade a cells
I've had them for a year without balancer, no problems so far. Now I increased charging voltage to 15.6V, we will see how it goes 😃
@@JoniK1 you will be fine at 2.6v per cell. And there is so little energy above 2.5v per cell that there is no need to go higher. In facr I would never recommend charging over 2.6 per cell. The only thing that can hurt these is overcharging.
I just bought a "40Ah" 5s pack to try in a car (the idea being to avoid a battery heater for winter, and reduce weight compared to a Pb battery). The voltage is a little low, but the reduced voltage sag under cranking should make it at least no worse than lead acid. With OEM sized lead acid, I find you get ~12.4V at best with a full battery, ignition + lights switched on, and less if the battery isn't brand new. As long as the open circuit voltage is over 11V, I think 40Ah LTO should be able to crank most engines out there.
Though the highest you're supposed to charge an LTO cell is 2.85V (14.25V in a 5S), research literature seems to suggest permanent damage only occurs above 3V, and most cars won't produce more than 14.7V under any circumstance (the exception being some newer German cars), so 5S should be safe, IMO.
I'm thinking that these would be good for an expedition vehicle. You can charge them quickly while driving and they will survive cold temps while winter camping
They are perfect for expeditions and cold climates, their only downside is size and cost
Interested in building an LTO pack for long distance ebike touring because of the high charge rate. The ability to travel 45 miles, potentially get a full charge off of any standard household outlet in 20-30 minutes while having lunch, and proceed is very practical for that use. Will need to pull it in a trailer though because of size and weight .
Thanks for the video .
I just bought 16 of 280Ah Lifepo4 from Alibaba at $86/pc. Supposedly brand new, grade A cells. I will do the capacity test and see if they are really 280 Ah. Will, do you think that Orion Junior 16s bms is not an overkill? Somehow I can not trust this so called low temp protection claimed on these Chinese units, seeing your reviews. I would rather spend a little more upfront. I like the CAN communication on these, just got the CAN to TCP/IP converter from ADFweb to view the battery data on my PLC and access it remotely. Thank you. Glad to see more of your videos again!
Acoording to your price, A grade?Sorry I don't think so. you can test the capacity when you got them. 😂😂
@@huangvicky9361 don't go by the price. Have a good look around. Lifepo4 are less expensive these days. That's not surprising.
@@AdamBoguski believe or not. there is no A grade cell with your price.
People gave you a bad rep but atleast you did not bow down to appease them and did what you found what right. Good on your part.
Always bought batteries from Alibaba and never had a bad surprise.
Another really interesting video Will, I have learned so much from your channel. Can you please do more videos on the all in one inverters? I'm having a nightmare problem with my Iconica, Now the supplier tells me the unit might not be suitable for my new lithium batteries! Gerrrrr.
you do an incredible job! Brazilian greetings!!
Solar batteries for standby systems do experience high C discharges to run appliances.
I can propose a scenario how to use this battery. If you are working at the off-grid location, you have to run a small electric tractor, a snow blower, a concrete mixer etc. So you can discharge the battery, then have a break to charge and keep working. So It's OK to charge it 5 or 10 times per day. If you have a solar panel with extra power output then efficiency doesn't matter but ratio of charge time to discharge time is critical.
Many thanks for this upload.
I been thinking about LTO, but now after your video I will keep my fingers away of this.
As you said: Go on with the Lithium FE batteries and wait during their life time for new technology - or prices for Lithium FE batterys going down.
Sadly, on two recent electronics orders from China I've had QC issues. The good news - Both vendors have quickly shipped entire replacements without asking for the old ones back. I have yet to assign a cost to becoming their QA Department, however.
I have a question.... I know nothing about what I’m trying to make so any help would be nice... I have 100 18650 and I have a 3000 watt sine inv. With a solar kit from harbor freight how do I configure the battery wall (wire the wall?) and do I need a BMS ...Please Advise thanks.
Bms sounds good
Again thanks for the info Will. I truly hope that you succeed in your quest to get grade A cells before you start drawing social security.
I have been doing tests on these batteries for 2 years. The problem that these batteries after charging up to 2.8V are quickly discharged automatically.
In addition, each cells does not charge correctly. So at the moment of electronic calibration you will lose the total battery voltage. So, after a whole day of calibration, you need to recharge them again. I have batteries of the same company as you.
I approach these batteries sold by individual Chinese shops are waste (bad somehow) from a large company - Yinlong.
To buy good batteries, you need to apply directly to the manufacturer
Commonly theese batteries selling on the market with 2.3v 40 Ah labels. Also Data sheets saying 1.5 V is discharge cut off voltage, not 1.6 v
your videos are so usefull -thanks a lot
and have a merry xmas and a happy new year
You can very easily install them in series, and get a 24, 48, or 96V system.
The current doesn't change on series connected batteries.
For solar cells, if you use many, you can very easily upvolt the 12V output to 96V, which is much better for long power leads, before charging the pack.
Maybe 100 amps isn't what you would use at 12V, but it's perfectly fine if your system is a larger system (like a solar farm) at 96V, or even 192V.
Inside is probably a samsung 40T and a buck converter. Try some extreme conditioning and see how they perform after a thrashing
I don't like the format of LTO cells. Not much use for chemistry in South Florida. Thanks for sharing.
They make them in regular square cells also.
The market for cold weather is greater than just Antarctica. im in the continental us and ive seen it get -65f. so northern us, canada, alaska, russia, northern europe, the arctic are all areas that have use for batteries like this. especially in industrial applications. oil and stuff
I would tend to believe that plenty of resellers label B cells as A cells, or even just lie about the effective reel capacity of A cells to sell them.
I actually burnt down my 4 year old house charging lithium titanate cells at 3.7 volts because I forgot I had used the dc to dc converter previously to charge 3.6 volt cells. When I checked on the voltage whilst charging the voltage reading was 2.6 volts due to voltage sag at the battery terminal.
So after about a year of watching this channel I have almost figured out what batteries not to buy. This is one of them.
I bet as soon as I do buy the new battery technology will hit the market making the so called best look like a joke though. Just like my first flat screen for 3 grand.
Lol it's crazy with flat screens. When I bought my house around 10 years ago I wanted a really good TV so I saved up for a year or two and bought a 55" HD Samsung. Was like 3 grand but it was on sale for 2. Super good deal at the time. Now they are practically giving those away.
Yes I love your videos makes my day at work
LTO has a linear voltage VS discharge graph. From 2.8V to about 2V. At 38Ah the equivalent Wh is about 2.4 x 38 = 91.2. For a constant 2V battery this is about 45.6Ah.
Wondering if they are using advertising liberty to claim Wh to Ah.
Would not be the first time someone is doing fuzzy math advertising.
Nah. They just ripped you off. Glad you keep them honest. Love the work you do !
Can you make a video on how set up and do a capacity test using a CBA4
Another great Video,
It's good you are here it test these for us.
Once you finish your dispute with the company let us know the company, I'll rewatch the video to see it you did that.
I know these test are a pain but it you could make them as close to real world test as possible that you be great. Assuming most of your viewer want these in a solar(off grid, maybe) set up.
Outland Solar had an advertisement on your page. Never heard of it, but it was an awesome commercial. Lol.
Not to change the subject, but I just ordered the Elechive universal power station
EH 2200 watt . YOU REVIEWED a yetti AC200 which was awesome but I missed out on the sale, but this
Elechive seems to be
even better hope you can review it because your the best sincerely.
What type if cabel do the daily bms use i runed 1 cabel and need to buy a new one
Please define what you mean by grade A, grade B, grade C. What is the criteria? How did these cells compare against the previous LTO pack you tested?
I do agree that these cells have been mislabeled (in A/H).
But why are you claiming that they are "B grade"?
Can't these cells simply be "A grade", but with a lower capacity?
How do you define "A grade" anyway?
That's what I was thinking when I watched. Mislabeled cells would have nothing to do with their quality. Another commenter pointed out they've never seen 45Ah cells of that size before, only 35, 40, and 55.
The coulombic efficiency (Ah out / Ah in) and the internal resistance would've been good to compare against his previous collection to determine the "grade".
Wow cheers Will was thinking of getting 16 for the RV - Back to Lifepo4 now
Looking to these cells for an ebike. I need 60amp continuous 24 volts. I know they are big but the c rates are awesome
I ordered a battle born 12v 100 amp hour lithium battery. I got the blue smart IP65 12/15 charger. I hope that will charge it. I'm new to this. Thank you for great videos.
I've seen a high peak in yin long cells in the car audio seen... I'm currently running xs power yin long 40ah bank in my daily vehicle
Great vid, really dig your testing methodology, etc. very thorough and great I go/explanations, I’m new to lithium, etc and want to be proficient in new battery tech, sub’n for sure.
Summed it up best, unless you need extreme safety or live in Antarctica stick with Lifepo4 for 2 to 4 times less money which gets you a lot bigger battery bank for the bucks. The voltage range makes them a mess to use too for anything 12 volt.
how do you get that graph with the voltage range? Is this software from the BMS? Thank you, love your videos.