Worst 18650 cells we Use
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- čas přidán 7. 08. 2018
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Just came from your Live Stream video...
When you said “150 degrees” I was thinking about 150 Celsius hahaha
FANTASTIC video, this is why your channel is growing so fast!!! =]
Bruno to answer your question "why is it called a Samba not a Kombi" Samba is the model of Kombi that has all the windows on the roof and a rag top. The Germans call the Kombi (VW Type2 Bus) Bullie :) I hope to show you mine one day so you can feel it's 2.3lt POWEEER!
Yeeeahhhh! So much POWAHHH for ever man!
Karl Bartelt hahahaaaa I always wondered “why Samba” hahaha thanks for that simple explanation =]
Soooooooo much POWEEEEEERRR
Jehu!!! I found a solution for the heaters! I have some of those and i found out that they start to heat at about 4.15V while charging. I charge those to 4.1V and they are just fine. Sure i lose some capacity but i can still use that 2000mAh or so. Using them that way is getting extra cells and capacity that would have been thrown away
Nice breakdowns, thanks. Glad to see the new PCB's
I can't wait to see your review of the BattGo. I was thoroughly impressed with the BG8S model. I'm still a little baffled how it balances the cells.
Going to use this is a pelican case like you did to power my ham radio!
Love those SANYO heaters, my 20kwh build is entirely made of these cells. After much testing I have worked out a few things. Number one is charge and discharge the cells at the rate you intent to use them at. So my setup will only ever see 300ma draw and charge, or in rough figures 2500w in or out for the setup. Number two, charging these at 300ma and you'll rarely see a heater, but you will see cells that never reach full charge or take a huge amount of time. These are your heaters :) your other heaters fail in the charger due to huge resistance :). Number three, sometimes you can visually tell from the wrapper that the cell is a heater, as the colour is slightly different because those cells were heating up big time in their original device. Number four, don't use or charge these in your house ! I test and keep my final packs outside ! I have plans to run my packs in containers that allow the heat to rise up in the case, which I can then monitor the temperature of each pack, any heater will slightly throw the heat signature of that pack allowing programs like PRTG to alert on abnormally high temps vs ambient vs history etc. it may work, using relays I can take that pack out of play :) could be overkill and expensive. I think eventually we will see laws that all battery packs live outdoors.
What I need is a good BMS for a portable computer project that I've been working on. I have access to brand new LG 3Ah cells for a reasonable price, but will likely parrallel them 8 wide to get a couple hours of run time. I see the FB link, so I'll take my question there, with more information, tomorrow.
Jehu please! I can’t wait for that 21700 cells video. When is it coming??
Stackable 18650 module with holder that's gold...
I never don't like idea of soldering to 18650 and spot welding battery pack prevent from easy replacement of dead cells.
It looks like great serviceable idea!
Electronic Noob Blog the holders cause hotter contacts, I don't know if he solved this problem with the holders...
If I remember he was Pushing the Power draw pretty high. Typical usage wont be that huge of a draw. 500ma to 1 amp
I would solve this just by lowering current (adding more modules in parallel).
I think he use off shelf 18650 holder and i would stay that way. In my opinion some times in overall design at end of the day it will be cheaper use something that is readily available than redesigning and making custom fit even better but much more expensive.
Is there a link to the lastest PCB Gerber file, Keen to get a some sent out to test. Your channel and group has inspired me to make a diy powerwall.
Please do more videos on battery balancing and actually running powerwalls! I love watching your videos but nobody ever covers cell balancing outside the standard "Use Batrium!"
great video, learned something new
Hey Jehu, what would the max temperature for a sanyo cell you would consider usable? Seems they all wont to warm up. Just because they are warm to the touch, do you feel safe using them?
Jehu, great work, when you do this kind of comaprison can you give us a rough idea of your time spent processing for the different packs (hrs/Kw)
I didn’t keep track
A good thing going forward because you're getting so busy (facebook and stuff) is log your time for each activity you do and work out which of those activities actually make you money, then calculate an hourly rate for your different activities, that way you soon will know how to prioritize your work. Thanks for the reply.
Awesome man
Damn, that tease, can't wait
Great info
Cheers
I know many of us are gonna find this really helpful. Would you build a 30Q 12S4P battery pack for an e-board from scratch, including a charger ? Your explanations about building stuffs are very coherent, thanks in advance Jehu.
Would those "heaters" be suitable to use in packs built for small ammo can style Bluetooth boomboxes?
What type of ir camera are you using? Very cool video thank you,
Hi Jehu, what is the standard charge and discharge current you use to check the capacity of salvaged 18650s? Thanks
several good tips! ;)
hay guys any info on charging 18650 with solar how to and what chargers should i get!!
Jehu, those are the new revision boards? Where can we get the files? Thanks!
Been following you a while now love your videos. Anychance you cna link me to one to build the most simplest of 12v batteries using 18650s. Dont need charging involved as dont mind taking batteries out to charge if have to. Just wanna safely make a simple 12v 18650 battery. Any help be appreciated
The Medical Cells Jehu bought from me were listed at 2800 to 2899mAh, and LOL, only two of them retested in the 2800 range, the rest were far above the listed capacity!!!
Hi there! I currently live in Korea and wanted to know how I am able to build a DIY powerwall here. Could you help me? The power here is 220V.
Jehu, love your passion. What "camera" are you using for seeing the heaters?
Anthony Plack looks like a Seek thermal camera as I have one and the display is the same.
Excellent
Hi i would like to get some use cell to start my own project.
nice before bed video. Are you using Flir thermal camera Therm-App, or Seek?
Cody Slab display matches my Seek
what chargers are you using?
I'm only new to the testing but have found the heaters when you let them cool down and then retest are mostly OK.
Really?
Definitely Have one but not sure it defines me
i would love to have this sources on Chile
First! my skateboard has 10% sanyos and they've been fine. there was a batch of models they made where were bad, most after that are ok.
Phizicks Sanyo is a brand with many versions.
do you know which batches are bad? I"m thinking I should double check some of mine.
Are there any UK suppliers?
Jehu” you’re the only person that can solve my problem, I checked the capacity of some old laptop batteries almost same but the discharge time is different some take 200 min some 500 min, what does it means. Please reply..
Different capacity?
Thank you for reply, I checked 2 different 2P cell one gives 3111 ma in 150 min, another 2582 ma in 540 min which one having more capacity.
Song at 1:45??
would 2.8V be considered bad cell?
Hi jehugarcia, when will the PCB's become available for purchase?
When I try to order them from; kit.com/jehu/custom-diy-projects
I see "We’re sorry, 7s24v DIY Module PCB 2 units isn’t available at this time"
What do you think of the Samsung 29E 2.9Ah for a powerwall? I´m starting a project on my own in Portugal, any advice on buying batteries in Europe?
Pretty much all batteries can be used for powerwalls, if you know what your doing
Nkon.nl is your way for new cells
Hi Jehu, totally enjoy your videos. My info is that China has closed the doors to buying these used cells.
biaya mahal, harga satu battery 15k-65k belum klo rusak harus cek satu persatu battery
@jehugarcia you should look into 3M Novec fluid. It's a special non-conductive coolant. If you could make sealed containers for the batteries; you would benefit from the heat dissipated off them (via plumbing the fluid to a heat exchanger). Food for thought. People submerse entire computers in this stuff. www.3m.com/3M/en_US/novec-us/applications/immersion-cooling/
I was looking for your Power to Puerto Rico shirt. It does not appear as an option. Could it be because it was designed in 2017?
It’s there, go to kit.com and search my name
kit.com/search?term=Jehu%20garcia Found the link.
Southern winds that you called heaters what's to stop the other ones from becoming heaters in the next two or three Cycles
The grace of god
Here's my protocol for testing these kinds of cells. I recover from laptop batteries mostly. 1) fully charge cells individually 250ma 4.2v for 12-16 hours until current drops to under 50ma. (any warm cells get tossed). 2) rest for 24 hours. Any cells below 4.15v get tossed. Discharge groups of cells in parallel (to speed up process) at 1.5a per cell down to 3v. Any warm cells get tossed. Charge 375ma 4.2v until current
warren. what do you end up with like 10 batteries? Most Cells will Self discharge down from 4.2 to 4.18 after a week, and 4.1 after 2. you should avoid letting them sit full, but they do drop fast from 4.2 because they hate sitting at that voltage. its why 80% is the preferred (4.1v) top off for max life during use. I built 2 e-bike packs of 54 volts and in 15s6p and most of my cells would not have passed. 30Wh per mile, Range is 20 miles or so on a 1kw motor. building a 2nd, now with the lot 2600 just released. Keep in mind most of the cells that have sat will show their true colors on first or 2nd charge. Personally I don't agree with using 2nd hand cells for things like Home power. that's not something I agree with but for projects like Bikes, backup Inverters or perhaps a Car. sure. the Pack dying or catching fire means you lost the project not your houshold power for your house or Residence.
I'm sure you're right about losing cells that would otherwise be acceptable for many projects. I'm just concerned that if I let a marginal cell get through, it will fail on me and cause a fire, or early failure of the battery pack requiring me to unweld it all apart, replace the faulty cell, and weld it all back together. The majority of the red wrapped cells (Sanyo I think) fail my testing very early on because they get more than 10C above ambient while charging. Many cells that test capacity below 1500 mAh are also not really useful for me for the most part. I didn't mention total capacity as part of my testing requirements because everyone is going to have different needs.
As for the cells dropping in voltage while in storage, I don't bother reading the voltage after the 30 day wait because I know that after that long the voltage is going to sag. That reduction in floating voltage isn't so much a result of the cells self-discharging in an unsafe way, so much as it is normal behavior for that chemistry of battery. I care more about capacity and internal resistance than I do floating voltage, really.
I don't know of an officially approved testing protocol for used 18650 cells, and I'm sure my testing is more thorough than it needs to be. I like it that way, because it makes me feel better about reusing salvaged cells from such a dangerous battery chemistry. If I get sloppy and a cell catches fire on me, it will be my own fault and will potentially ruin an entire project. Much better for me to toss a few good cells than to risk a crap cell getting through and ruining it all for me.
Yes! 😎😎😎👍👍👍
What is the version of cells called heaters? Besides simply red?
Sanyo 18650u
jehugarcia that makes it kind of a “duh”. Please please don’t just say “Sanyo red heaters “ . GA series are red too! That’s ever my only complaint with your channel. You have do much information, and do much going on, you space details and take short cuts and further confusing information. Since you hope to produce great videos, find someone to help and get some background to link watchers, data, sources, and links. This is NOT a negative review. It’s a comment hoping to see you succeed at an even greater level.
its easy to say "Do it better" Doing it is another thing, Im a one man band and I do what I can with what I have.
Could i run a samsung 18650 and...say an lg 18650 in series?
Charles Adair with a bms, yeah
Fishman 02 BMS?
Charles Adair battery management system, it keeps all the cells at the same voltage, so the difference in capacity will not matter.
Your wife let you into the living room. You must have brought her flowers today.
She doesn’t know I was there
Hey
PCBs!
Are you ever worried about a melt down of a cell? If so.. Why? If not.. Why not?
How about building an electrified mini-bike?
Jehugarcia, do you document which cells are good or bad or rate them on a scale? It would be great for the community. If you are interested, give me a PM and I can help you out.
one of your more informative videos
-I presently have about 200 salvaged 18650's harvested from notebook batteries
-and like you find 60 to 70 % GOOD once tested and balanced
-yup Sanyo's ,if identified,are as bad as Chinese "brand "x" units (about 25 %) ,
most used in Acer notebook and other lower tier units like H/P,Asus,Sony and Toshiba
have had better luck with Panasonic,Samsung, and LG's used in BUSINESS CLASS
Dells and Lenovo battery packs.-and MOST true Toughbooks,not all ~
Sony units vary widely from excellent Japanese made to CRAP Chinese (IF identifiable ~)
printed circuit boards? are any circuit boards not printed?
Sure, some don’t have silk screen printing on them
Where can we order the PCBs?
there is also Point to point circuits in old tech like Tube amplifiers of the 50s
I have those same reddish cells inside laptop battery. i buyed 300rs non of them working good f****k fake 18650
Note" when any one make a vid make sure there is annoying music that drowns out the speaker
I’ve been told I’m the best at this
need good volume so older ppl can hear and turn down it they want,,,good show i am looking at building elect trikes with regen..
I bought a batch of these heaters wasn't no where as good his 20 were below 0 volt none of them above 1800 mah most of them 1600 an below an a few heater waste of your time and money also bought some ryobi batteries from tom waste of money also bought some batteries that were supposed to be 2000 mah not three times screwed from tom maybe im unlucky but wont buy again from alarm hookup
Eleven thirty three pm
12.53
Hola :)
Island Times holaaaaa
Send me that doesn't tell you that the cells that you know that you think are good how long do they last are they good for a hundred charges 10 charges 4000 charges what is their outcome at through have an outcome you don't know what they're actually worth
No one knows
jehugarcia what do you think of this guy's battery management and the way he connects his stuff to his batteries he made these blocks and what not you thinking has any it's a good system looks like it's pretty sturdy but I don't know nothing about this his own little balancing Soul circuit boards that he made
czcams.com/video/QwOpa8gT4Uk/video.html
we have a expression in Belgium, "he thinks that he invented warm water" :p
First!!!
I use the Batgo @jehu and I have a video!!!
POWEEEERRRRR