Build 150A LiFePO4 12v Battey Pack using k2 26650p cells
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- Опубліковано 12 бер 2019
- Batteries - kit.com/jehu/lithium-battery-...
BMS -j35.us/2Cea16L
Box - amzn.to/2XQDGfj
Binding Posts - amzn.to/2CgjKcC
Brass Strip - amzn.to/2u5iXqo
inverter - amzn.to/2F98P6x
Meter - amzn.to/2F99jtn
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7) What is the best fuse wire? I only use 1/8w resistor legs j35.us/ResistorLegs
8) Why not use Supercapacitors?
A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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I have to say that when I play your videos I can see that you are so genuine in what you do and your personality. You bring such an amazing smile to my face by what you do and wanting to share your knowledge. thank you for sharing all that you know and wanting to make the world a better place by preparing people, to just be prepared and to allow themselves to expand their knowledge and understanding in the battery world. Thank you so much for your personality and what you provide to the rest of us.
Thank you Jehu,I try to learn but so much..I can say that pack is amassing,2 in a car for starter would lighten up by some pounds..In a RV,Man that's a 80+ pound savings and for HAM radio operators,Preparing for power failure,and a 24/7 charger,Man you kied it.My radio draws 25 amps-+(not continuous)and a 500 AL-500,Solid state amp draws 95-110 and(NC)..That be crazy cool for RV and HAM radio folks.Advertise in QST magazine..
Thank you,Stay well.73
U just built an amazing motorcycle battery that is half the size and weight of your traditional Lead acid or agm battery. P for power so easily at least 600 cold cranking amps. Enough to start a car and definitely any Harley motorcycle. Congrats!
You treat them nice and they'll give you amazing storage. Loving the advances.
It's amazing how this guy didn't know how to read the specs but showed people how to build a battery pack in a dangerous way! 150A is the rated short pulse current, not for a prolong discharge.
I think what you did was confirm the spec sheet, which says 42A continuous, 50A Pulse discharge(30 seconds), and 150A Short Pulse Discharge. i.e., they actually are rated 40ish Amps per your test.
Good project vid.
Agreed. I don't know why he didn't point this out in the video. He could probably have hit +400A for only half a second in a single burst based on the spec sheet rating. Sustained output like he was showing here would be limited to around 160-200A
@@cavemaneca true ...only 70amp rated lifepo is the a123 systems 26650 but it has only 1500mah or so
Peter Zingler
Peter I have 30 26650 and I was testing by doing a 13.2v and use a USB step down module for 5v to charge phones question
Why I was reading only 5V 1A when it should be 3.99
The usb module is rated input up to 30v 3A Max.
Can I use a single BMS with this batteries? Or it have to be multiple for every S?
24v will be better ? To charge a laptop and cell phones...
Just want guidance what is best for this type of batteries
Thanks for any advice
The junction box is a great idea. Also thanks for turning me on to drok. 1000w digital buck converter step down power supply thingy whatever $42 wow. I was looking at other products but this blows them away for cost and versatility. Thanks again
I use. 1c charge and discharge limit via automotive solid state breakers. My 20 amp by 4 lifepo4 cells will last 3k cycles because I'm kimd to em
WOW that small lifepo4 battery is 10 times better than my Lead acid battery WOW I'm impressed I have to invest in these batterys.
Seems like a strange title. Great build, especially impressive for the size. According to the design (4s5p) and the max continuous rating for the battery (42 amps) it should be a 210 amp battery pack. Recommended operating conditions would bring that down to 50 amps (10 amp per battery). Especially since your design changed during the build (5 BMS to 4 BMS) and you skipped over most of the wiring details, a diagram would be really useful. Not sure how you use 4 BMS to connect to 5 groups of batteries. I suspect the relatively thin internal wiring might explain why a voltage drop was a big more than expected.
Enfin du bon travail, avec 1 bms pour 4S,tout les accus sont bien équilibré, contrairement au montage parallèle....je fait la même chose en ce moment, mais avec des 38120....
Ide highly recommend using no less than 4 awg wire for the output to reduce the voltage drop and avoid a wire meltdown on the output from the battery to the binding post infact you may consider a double 4 awg for high current. The week point in the pack is going to be the thin wire you used even though you doubled it.
I think it would be a good idea to monitor some of the cells during testing to see how close the actual voltage matches the calculated cell voltage you came up with when measuring the total output of the assembly. This would show how much voltage drop you might have through the BMS, bus bars, output connectors and cables, etc.
I love your projects!! The both for the walls an E cars! I have had this idea of running a green house on car led battery's repowered by wind or a hydro power before I ran into your buds. You have blown my mind on what 18650 batteries can do because I had been using them for my vape mods sense the beginning an a cousin of mine has always told me how powerful they are an merging so much information to us the public. Thank you so much!! I was thinking of using a pack of 18650s as a replacement for a extra battery in my vehicle to power my subwoofer. Music as you might know does not draw a constant amount of amps but for the lows of bass in music is where the peak amps are used witch is know more than a few seconds at a time at the most. As long as the batteries are in series to make 12 volts couldn't 18 650 batteries sustain this output amount of energy? I think this would be a very interesting project for you to take on to see how well these batteries can sustain on this different variations of power out put. Thank you again.
You should do a voltage drop test and see what you're losing in those 4ga cables at 135A. Just attach your multimeter (on dc volts mode) to each end of one cable, while it's all running.
Cool Jehu, thanks I picked up several sets. Could you please identify the brass or copper BMS bars you used? it all went by so fast. ✌
Try using one bms feeding into a high current relay. After the relay put a high current fuse on it with at least 2 gauge wire. The voltage drop would be lower.
I'm just getting started,,,very informative,,,thanks... D
I can run my HAM and My CB's off that I'm making one for sure thanks jehugarcia
I'm so used to hearing AvE's name for hot glue; Hot Snot, that I was thrown for a moment there! XD
That's actually not just AvE, it's the official Canadian word for hot-melt glue.
@@ahsmeg4069 We use it in the Netherlands too, at least I do.
I bet them would be great in some type of off grid setup where you only need them high amps to startup motors/compressors and what not...
You're getting a voltage drop over those cables, I could almost guarantee it.
Also, there's no way the cables you used INSIDE the battery box can handle the amps, if I'm estimating their size correctly.
It really becomes a challenge getting the power out of the batteries at such a high rate, even if the cells can supply it. :)
agreed the bottle neck is definatly the wire connecting from the batteries to the lugs.. at the minimum should have used the bus bars to handle the current..
Yep. At 8:29 you see he's got somewhere between 12 and 16 awg wire from each battery to its BMS. I'm sure it was for space consideration, but using thin, wide bus bars as were used to connect the cells to each other, going to the BMS's would be significantly better. He's probably right that it's not dangerous - at 30A per wire you're not going to get a large heat buildup before discharging the cells.
It would probably be more useful and provide a lot more room for the right wiring to do 4p4s. Even if heating isn't the issue, you're losing over 20% of the power through the thin wires anyway, so the extra battery string is useless anyway - it's all going to heat.
*jehugarcia* Excellent video, thank you.
I hopped to make a jump pack for a car with these batteries but Im guessing they fall a bit short
Great vid-You really know your batteries :)
He really doesn't.
1000% Original Thank you for the video
What's the mass or how can I figure out how many amps my lifepo4 pack is putting out I'm running the head weigh batteries 4S 7 parallel 70Ah total. All I have right now for testing is a basic multi meter.
nice test.....I like theDrok meter....I have the same one from amazon but it came with a 50amp shunt,,,,, what shunt was being used on this test,,,,i need one that can handle 150 to 200amps
Just some omnitek 32650 lifepo4. Gotta lot of work to balance out cells first before I can make my packs. What do you think of recycling nicd and incorporating with li-ion.
Great video, thank you. Easy question - how did attach the battery pack to the lid of your junction box?
How do you connect your bms in parallel.?
Any diagram? I dont how i done the connection
I wonder if a 9s would work better for a 24v system. 22.5v load sage with 30.15v peak voltage.
Nice for e-bike...thanks..
On this video you soldered the K2 cells. Would you recommend doing that? Is there any chance of damaging the cells? Thanks good videos as usual.
Hey I realized that you have a lot of knowledge about these batteries, I would like to hear what's your advice on building 14 volt battery to support a 5000 RMS car audio sound system and what is the most cost-effective way to build a battery to support that kind of power? I would just like to say thanks in advance for whatever advice you can share.
he already answered that in one of his video, small bms control contractor and contractor control output power.
@@JawadAhmadsahibzada is the video slower on his patreon?
@@thomasnyanfore8424 check his UA-cam videos.
Love your videos man
Great tests you conduct.... having seen this I like the 26850 but I'd ask how much
variance in the Label ratings & the actual numbers the battery can do? I mean are
these batteries made w/ quality and/or good standards? I know you test the stuff
you build but it seems like the market is starting to dump lots of these salvage
batteries out & I question them. It means we're seeing Lithium coming out of
Afghanistan or other places. Price drops are coming.... I need your help to
build them. thank you for these videos
Oh boy good old trick with witing as fuses. :>
How did you handle the separate charging connections? P- and C-
hey can you used these batteries for off the grid solar
Love the vid. Could you do the same test with the 200 amp pouch cells you built for the solar gen?
More lifepo4 projects please
I put a balance lead on my packs with the BMS! I'm thinking I'll use 30 amp fuses to protect the wires, with a 80 amp breaker to protect the bank! My bms has separate charging connections , did yours??? I have a separate bms bypassed connection I use my balance charger with. But will use the BMS under normal use.
Great video Jehu, question: Is there any BMS that would allow me to build a lithium (18650?) drop in replacement for a lead acid based UPS? How would you approach this?
I'm curious as well. My AGM batteries are starting to heat up and would like to replace with something safer.
Would it be posible to use one 4s bms to replace my ups battery of 8AH without damaging my ups?
Would this work in a car audio situation as an extra battery
how many watts is it able to put out if it says 30 amps,how to calculate..
asking because it can be useble with big drones with big props that doesnt turn fast but eats amps anyhow.
i have 6 motors that each can use 900watts but thats max power so nominall it shoud be around 300 to 500 watts
and they need 22,2 volts
So I could replace my 120ah deep cycle AGM batteries with a couple of these little puppies and save a ton on weight .
Will have to research for best price .
Cool thanks.
Great job, as always👍👏👏👏👏👏
Can you release a wiring diagram for the BMS i cant find one online anywhere
Jehu, awesome video. I was really curious about the 150 amp rating.
I noticed batteryhookup has another 26650 cell with 3300 mah. More than than the one you tested.
Given the test results would the 3300 mah version be a better buy?
I bought both - the "P" suffix model (42A max cont., 2,850mAh) for high current jump starter pack, and the "EV" (12A max cont., 3,200mAh) for a low drain UPS unit. That's just the usual current vs. capacity trade-off. I missed getting the 3,700mAh EVs by a few hours :-(
Can this batteries be used as automotive batteries and does my car get enough charge for morning starter after 15 days?
Use it as a replacement battery 🔋 to automotive AGM or Lead Acid. inline with Super Capacitors.
As long as you don't live someplace where it drops below freezing. At a certain low temperature these batteries will be destroyed when the alternator starts to charge them.
Ya, but u need to regulated charging amp from ur alternator or u will fry the alternator
@@robinong5803 The alternator in a typical vehicle is oversized by a pretty decent margin anyway and they are already voltage regulated so once they reach maximum output current the output voltage begins to drop off if the demand is higher. You are not adding any more load you are simply changing the internal impedance of the battery slightly and the alternator should be just fine as long as you are not letting the battery go so flat that the car won't start and that is that same with lead-acid. The positive wire from the alternator will already add a decent amount of resistance to the circuit. I ran a vehicle off of nothing but super caps for over 6 months and the alternator had no issues keeping up with the super caps even though they have a lower impedance than lithium batteries.
@@kuhrd interesting. Where can I find more info on this.
Lupet neto idol.. More power
the battery you are building would make a fine spot welder for the battery you are making 400 amps and some spot welding contacts and you are there the bms could be used for amperage control a display a pot to set current and a spring to hold the 1 contact up until you weld wala:-)
Hello, good morning, I have been watching your videos some time ago, I am from Argentina and I would like to check if you can test the CCA that delivers a battery pack like this, since I am about to start building my own and I would like to have a notion of that data.
READ WHAT THE DESCRIPTION SAYS "These are 2600mah cells that can put out 150 amps in a short 10 second burst." ALSO RECOMMENDED OPERATING CONDITIONS ARE CONTINUOUS 10 AMP DISCHARGE, 42 AMP MAX CONTINUOUS DISCHARGE." If you operate this power bank as built I hope you have a fire insurance policy and fire extinguisher handy.
Yea i figured that's what they meant. That's still really good for it it's size.
If you created a 36v or 48v system rather than a 12v you could have 1 cell extra in series to lift up the sag! :) You might even get away with it in a 24v configuration depending on what load you have but it might be a but high voltage under small loads...
I need some of these to build a portable unit.
Could you use a boost converter to up the voltage to 12volts to fix this problem? Of course you would have to go to a bigger case.
Hey! What’s the name of the thermal app or thermal cam you use on this video??
I got two questions:
1. What's the name of the LCD meter for the battery?
2. Any wiring schematic for this build?
Thanks!
amzn.to/2F99jtn
I would love to have a detailed schematic also, thanks!
Maybe bms doesnt work well? Have tou tried changing your bms or checking its temperature?
I have to ask something, the battery specifications says 3.65v (max recommended voltage, so 3.65v * 4s = 14.6v ) but in this test you used as a full charge 13.28/4= 3.32v.
So If you charge at full voltage maybe you can reach even more power? Or you did that because of the inverter input?.
Thanks for your videos!!!!!!
Off topic Question. About a year ago you did a video on the Uni-Solar PVL-136 amorphous panel. I never saw a follow up video, do you still have it? If so hows it doing and would you still recommend it?
How do you wire multiple BMS in parallel to get more amp throughput....??
I didn't understand the way that the BMS connected between them... Can you explain it ? Or even refer me to read about it...?
Awesome work, if you want to add Apple Car Play to your factory radio Thank you for the content
i want to know about bms kit and its working
Lol. I've seen some videos you have made. But you showed the website which said the max amp for 10 seconds.
They were 10 amps C you had series, which I think was 5.
So about 50amps C.
Which you showed was working as specified.
You did push past the limits of the battery's as set out, so no shocks there..
interesting, would be curious to see what the resistive losses are ( Voltage drop of wiring, terminals/connections, sense resistor ) in your setup and take that into your analysis. perhaps measure the voltage at couple of battery cells while under load. it could suggest use of heavier wiring/terminals, etc. to reduce losses. ( + those batteries are getting Hott! ) . . . Cheers
I agree... Perhaps half of the voltage loss might have been in the wiring and BMS boards, would be interesting to see the raw cell voltages under load and see if that differed.
Wow! Mr. Jehu G., Is it safe to connect them in parallel both the positive, negative, and balancing leads.
Thank you for your reply.
Is there any point in wiring the discharge through the bms? Seems to me it would only adds another place where the amps can get restricted. wouldnt it be enough to only charge through the bms if the point is to draw maximum power from the batter pack.
Can i parallel it to a different battery chemistry's like 18650
Hello jehu,
thanks for the vídeos. Do you think it's possible to use these batteries safely on a formula student electric car?
Those prices are a way lower than usual
simple answer is no, I've purchased 300 dollars worth of these cells but they are not 150A rated like advertise, if you want big power then go with high-power pouch cell, cylinder cell ain't cut it.
It would require active cooling. Remember what the original temp verses power output showed? Which raises cost and complexity severely. Just ain't worth it
Thats a lots of learning . But can you do a simple calculation for me on this model . How much hours will this battery last with a load of 500 watts ?
Did you describe how you ran the balance leads into 4 parallel BMSs. Did you also parallel the balance leads?
Hi! For a 120 cells of 32650 lifepo4 battery pack, how many BMS should I use and how to connect them?
Interesting. Can I know exactly how soldered the BMS
what is the cost to build this pack? I would like to build a 12v 17Ah or somewhere around this pack size but I don't know anything about this. Can you help me or maybe I can buy one from you?
You can only look at the "continuous discharge" when determining the power available.
The continuous discharge is 42 amps per the spec sheet.
With 50 amp discharge for 30 seconds.
And a burst pulse of 150...which is were that so-called "rating" comes from.
I was wondering about that.
Great. Pls how u soldered the back side is not clear to me...
running the numbers on cost... is it just me or is a sla agm in the 35Ah range about 1/10 the cost per Ah? the tradeoffs are size/weight, and life cycles. rated usable cycles are about 1/10 so if you're frequently deep cycling them the lifepo4 batteries will clobber the sla batteries over time. but if the purpose is a few cycles every year and the rest of the time you're on a maintenance charge the $/Ah isn't there. I'm including the cost of the box/bms/battery monitor since they aren't really optional. I'm still going to build one of these. crazy power density, just what I need at Airventure for a week. throw it in the bicycle trailer instead of the old used up ups battery I've been using.
You have caused tom to sell all the batteries!!! I had to use 20* 2600 mah cells in my 3200 mah bank. The last battery is going to be a couple ah lower than the others! I guess I should have bought insted of waiting! I used 3* 100 amp BMS, that will surge something like 120a- 150a each. They have car starting BMS for near $40 on eBay. But I'm not starting a car. I'm just running lights and a small pump, maybe a radio! Something like a 20 amp load, usually about 2amps, with the highest peaks of 50-75 amps or so . great video... I may get some more, if Tom comes up with more like I have! Gotta getem while there avalible to be got!!!
JAMES! Since the 70's do you have a link for the car starting bms?
whats your environment temperature ?
Please do mention that in your videos.
What build would I do to be able to run a Boyu 910 Aquarium pump that is 12v 120W for at least 2 to 3 hours? I can't find the amp draw on this pump.
capacitors will be the better option over batteries make a hybrid 10% batteries 90% super /ultra capacitors ... you can find more about them on you tube
So... can i get at least 100 amps if i add more batteries? I really liked this set up because it was pretty small, sure like to see this set up being improved.
did you also connected the balancing wires of all bms in parallel?
nice cells.
Try to put supercap in parallel on the output :D
Cool one bro
Could you use them for an e-bike?
Beautiful
Have another look at the spec sheet max is 42amps continuous , 50amps 30 seconds pulse and 150amps short pluse .
This is exactly what I need for my fishing kayak trolling motor💯. Its modular, lots of amp hour all wrapped up in small package. How much for something like this to build and the materials I need and is a 12v of continuous power?
I wonder if larger wires to the inverter would have provided less resistance and more available power.
Can this battery handle car alternator output. Will the BMS protect the cells from over voltage or high current output?
They are use for marine applications.
eskate battery? 8s 75A.... crazy range! 12s 50A also crazy range...
Hi Jehu, in your video I saw that you were watching your live recordings on your mobile, could you please share how you did that?
GoPro app
So I'm looking to put in a lithium battery bank for my schoolie conversion. My inverter is 12v 16 max 10 min. I want to do a 4s setup. Should I do 4 100 parallel battery packs then wire them into series or do 100 parallel 4 series packs? Inverter is 3000 watt so I'm guessing my Max draw from the bank at low voltage of 12v(4x3v) would be 250 amps. 4v charge per cell to 3.0 discharge would give my batteries a lot of life right? I'd rather buy more cells and have them last longer than try and squeeze every watt out of them and reduce their life cycle.
Is it possible for you to get a 24V/48V inverter? You will save quite a bit of money on capable cabling, along with easy voltage comparison.
@@neutronpcxt372 in could buy I already have the cables and inverter plus every other light and USB on the bus is 12v
Wow, I thought you were kidding when you showed that pic the other day. Apologies. Cool (but expensive @ ~ a buck an amp) little 12v box.