How to Convert 12v 7Ah Lead Acid Battery Into 12v 16.8Ah Li-Ion Battery Pack and 50400mAh Power Bank
ฝัง
- เผยแพร่เมื่อ 2 เม.ย. 2022
- #ErCanEverything #LeadAcidBattery #PowerBank
💥In this video you watched how I'm converted a 12V 7Ah Lead Acid Battery to 12V 16.8Ah Li-Ion and 50,400mAh 181Wh QC3.0 Supported Dual Power Bank
💥I used SANYO UR18650AA Cells
Rated capacity: 2100mAh
Nominal voltage: 3.6V
Standard charge current: 1505mA
Charge end voltage: 4.20V
Charge cut-off current: 43mA
Max. discharge current: 4.3A
💥3S 11.1 - 12.6V 40A BMS:
👉s.click.aliexpress.com/e/_EJD...
🔋Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)
Product Size: 42 * 60 * 3.4mm (balanced version)
Product weight: 9.8g (balanced version)
Charging voltage: 12.6V - 13.6V
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
Continuous charge current (upper limit): 20A
Balance version: suitable for starting current below 80A, power 170W below the drill.
💥USB QC3.0 QC2.0 USB DC-DC Buck Converter Charging Step Down Module 6-32V to 5V 9V 12V 24V Fast Quick Charger Circuit Board
👉s.click.aliexpress.com/e/_EJ3...
🔋(Product Features · Input voltage range: 6V-32V · Output voltage: default 5V, automatically adjust between 3-12V after triggering fast charge · Output power: up to 24W (5V/3.4A, 9V/2.5A, 12V/2A, etc.) · Output voltage cable compensation function · Conversion efficiency: 90%-97% · Support multiple fast charging protocols · Input overvoltage and undervoltage protection · Input overcurrent protection · Output overcurrent, short circuit protection · Machine over temperature protection Support fast charge agreement · Support DCP protocol, BC1.2, Apple, Samsung protocol · Support Huawei Fast Charge Protocol FCP/SCP · Support Huawei Fast Charge Protocol AFC · Support Spreadtrum Fast Charge Protocol SFCP · Support Qualcomm QC2.0 and 3.0 · Support MTK PE1.1/PE2.0)
💥ON-OFF Switch 3A 10*15MM
s.click.aliexpress.com/e/_EJY...
💥USB Tester 13 in 1 Energy Meter
👉s.click.aliexpress.com/e/_DD0...
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Dude has some serious soldering skills. And the plastic bottle shrink wrap was an awesome trick.
Thank you very much🙏
yeah that bottle shrinkwrap was a great idea, cheaper than shrink wrap
@@jacquesb5248 except it's really not, it can heat the battery too much
Its heat up to 40⁰C.
You can see in this video at 6:43 th-cam.com/video/eCeeIFec7Y8/w-d-xo.html
@@breezetix Soldering lithium cells is really dumb. It shortens the life of the battery
Woww, plastic bottle shrink wrap was mind-blowing 🤯
That extra heat on batteries too 😂
@@Naughty_Squad For sure! 😅
@@hyperrunner4589I am from India we Indians do also same bottle wrap with criket bat Handel to protect it
I know it was not the focus of the video, but yep, same here!! 😅 .. when I watched that being made, I immediatelly clicked on like ... anyone else? 🤨
Es posible obtener el diagrama de montaje??
Mil gracias 😊
Man the most amazing part of this video is the heat shrink it is effective and good for the environment I learn a lot from this video thanks 😊
I made one of these about 2 years ago using a commercial case kit inc BMS. No on/off switch but added a small push button switch and a battery level meter. I also made another including a cell monitor instead which shows voltage overall plus volts on each bank & alarms when individual banks drop below minimum volts. The level display and the alarm/monitor are available online for a low price and are a worthwhile addition.
Link hehe
I want to ask you something . Please tell me if you know about it. For many days I'm trying to find or build a hot cutter knife like tool which can cut the plastic so I can put switches , led lights or connectors in the plastic body. soldering iron only works for round holes and it gets messed up with melted plastic, small cutting disk doesn't work everywhere. I tried to modifying a soldering iron but it didn't work as expected.
Currently I heat up a knife on the gas stove and cut the plastic with it , But it is so frustrating, I have to keep re heating it and I can do it in kitchen only, I end up giving up on many projects. Please tell me if you have solution to this issue. I'll be very thankful.
Renovator multitool!
@@ErCanEverythingyes they're great with a fine blade for straight edges and the narrow width blade does great holes for rectangular switches. The sides of the blades can also be ground down to get them narrower.
@@ErCanEverythingJust remembered, they work on Aluminum also!
I must say, this is one of the most well thought out builds I've seen for a long time. Careful wire runs etc. Suggestions, if I may, I would also have another 2 series links (like another comment said) and I would like to see some thermal separation between the charge controller and the battery pack. Either the thin composite board for even Kapton tape in a pinch. Also, I know it was sped up and it's hard to tell, but when using the heat gun to shrink the plastic, take a break every now and then so as not to stress the cells out from overheating. Oh and whack some hot glue or kapton tape over the 12v terminal undersides for good measure. If something pops off under that lot, then there could be a colourful fireworks display. All just suggestions and not meant as a criticism.
Эээээз
Thank you🙂🤝🤝🤝
Цццц2йй 2
P⁰⁰⁰mm
You've covered every single one of the issues I have with this build. Only other thing I can think of would be to provide for improved cooling while the pack is in use. But I'm nit picking there. 🙃
Very nice build. My dyslexia saw 50,400 ah watt hour??? battery and thought it was bigger than my battery pack. Mine is 3600 Amp Hours, 46,000 Watt Hours and needs a forklift to move. I stayed to the end and was impressed with your skills. I had a bit of PTSD with the Dremel tool work as it sounded like the root canal I had that went wrong. Very nice work!
Thank you🙂🤝
lol. and your build is impressive. IS it even legal, I saw someone made a 25kwh battery, and turned out it won't pass inspection.
@@bhupendrakumar2520 It's currently in an off grid location where regulations are simple. Besides, it has multiple breakers and electrical outlets and nothing is permanent or hard wired. It has 50 amp 240 volt outlets, 30 amp 120 volt RV cable outlets, and 20 amp 120 volt outlets. It is no different than running an EcoFlow unit. It's just bigger and more powerful. Even the solar panels are ''portable'' and have angled frames that have indoor outdoor carpet on the bottoms and they can be readily moved in seconds.
I built it here in my shop, ran it for 3 months, and we disassembled it to transport it to my old college buddy's mountain cabin. He paid for the parts long ago. Hese's a very early video of it before the improvements.
th-cam.com/video/GPYg1QZJ24o/w-d-xo.html
You cracked me up!
I think he meant 50,000ma continuous discharge! I don’t know how he even can use this without a 5 v step down converter for the Usb ports as this is not a 12 v battery and should not be used as such.. I would have reservations about even using a pop bottle for this as I would want more insulated material used.
Skillfull build, thoughtful, and well produced video. Definitely a keeper. More, please! 👍
Thank you my Friend🙂❤️🤝🤝🤝
Excellent project! I have same BMS, but I planned to use it in drill battery.. Now I considering to use it in garage Lithium battery project to replace SLA.. My solar charger can charge SLA and Lithium, only I need to change settings..
Love idea to use old used soda bottle as heat shrink tube! ❤️👍
Great video with cool ideas!
Thank you very much🙏🤝
A very fine build, I was not aware that a pack of 18650 cells would fit so perfectly inside a 12V gel-cell case. Also was not aware that a PET bottle would shrink so nicely over an 18650 pack - a good idea if/when you don't have commercial Heat Shrink Tubing that large when you need it. I would like to give three minor suggestions: First, go easy on the heat around the cells when shrinking down the covering (as Lloyd's Shednanigans suggested below) to avoid overheating the pack. Second, use 1/4" tinned braid instead of flattened solid core wire to join the cells together. It's just as thin but will carry more current and give you a small degree of flexibility which could prevent a cracked solder joint from disabling or causing sparks inside the pack. And third, put in an inline fuse, such as an auto fuse, above the cells like you did the switch and USB connectors to protect the pack from over-current situations.
Thank you🙂
BMS covers the overcurrent/overvoltage
Appp😊
@@bimrz1642 ✅✅AND undervoltage!✅✅
Kindly show polarity of 18650 baþary
thats the perfect use of space and technology ..mind blowing...🤟
That bottle idea was really genius
Wow!! The plastic bottle becoming heatshrink trick is genius! Everything else is cool too, 18560s are so versitile and so ubiquitous nowadays.
I'm glad you liked it🙂🤝
What an amazing idea for shrink wrap I genuinely learnt something today
Thank you🙂
Instant like for the idea of using an old plastic bottle around the battery to protect it. Great ideia!
EXCELLENT!!!
The best project with an old lead acid battery 12v and li-ion cells.
Получил огромное удовольствие от проделанной работы. Что бы у тебя НИКОГДА не болели руки
Thank you very much🙏🙂🤝
В чем преимущество переделки ?, Типо объем больше?
@@user-lx2yc5mr2t Типо качан длиннее🤦
@@kacalap чё за качан?
Вопрос. А чем заряжать этого монстра? Лабораторным зарядным устройством? Его чем попало не зарядишь где угодно. Есть решение с мобильным зарядным? В ИБП его не воткнешь будет заряжать его сутки а то й больше там ток на 10 ампер!!!
Но идея бомба. Тоже попробую такое сделать
Good skills. Good ideas. Perhaps the cells should not be touching each other to allow air gap for air flow to cool the cells. The shrink wrapping with PET bottle also restricts a lot of air flow. Not sure if the final product is a fire hazard or not.
Fire hazard? No. If the cells are heating up to the point that combustion was possible you are abusing them not using them. Heat produced during normal use would not create any issue whatsoever.
@@barthchris1 It's TH-cam. Nobody takes these comments seriously. Batteries barely get warm during normal service. That's not news but thanks for pointing it out.
@@barthchris1 I have a slightly different BMS on mine that has a thermistor to monitor both charging and discharging temperature that cuts off the input/output on overtemp. Not all BMS's are built to the same standard. Caveat emptor!
Meh not really true at all. Batteries routinely get warm when put into the same roles as that 12V/7Ah brick, for example they are commonly found in 600VA UPS, where there may be 50A current draw. Granted, since he has 8 cells in parallel per series, that's only 6A each, but 18650 cells do get far more than barely warm at 6A sustained draw. @@bingosunnoon9341
Полезно. Скоро ще правя и аз батерия за една количка на лапето. Благодаря ти за видеото!
Това ще е идеално, направих такъв за осветлението на градината със слънчев панел от 2-3 години насам си работи без проблем.
I’m going to have to make one of these vert impressive work my friend!
One thing. Did you make the wires from battery to outside connector both positive and negative the same length as the resistance will vary if not? André in Sydney
5-10 cm long or short cable it does not matter
The metal panels look a similar size to the 6800-9800mah lithium flat packs, I'm sure you could get some directly matched sizes and boost that mah rating even more.
Freaking unbelievable from start to finish super BOSS mode, bro you're a true prepper🙏
Thank you my Friend🙏🙂🤝
Geri dönüşüm, estetik ve becerinin harmanlanmış hali bu olsa gerek. Tek kelimeyle harikasın...
প্লাস্টিক বোতল এই কাজ টা করে ফেললেন আমি তো অবাক আর জিনিসটা এত সুন্দর হয়েছে বলে বোঝাতে পারবো না সত্যি বুদ্ধি মানতে হবে এই প্রথম এমন কম খরচে এত সুন্দর জিনিষ টা না দেখে কমমেন্ট না করে থাকতে পারলাম না 😊😊 !
Nice. But I prefer 4S LiFePo4 for lead-acid alternative because of better voltage equality and compatibility with chargers and equipment and higher currents capability. Did in same case battery from 4 32700 6a-h elements, it can start Yamaha R6 engine. Now building in case of originall motorcycle battery which is a 5mm thicker so I can install 4x 33140 15a-h LiFePo4 elements, and battery is still lighter than original lead-acid was (2kg vs 2.8kg)
I completely agree, Sobakin76. Lead-acid batteries charge at 14v. With only three 3.6v lithium-ion cells in series, you get 14v / 3 = 4.67v charging voltage, which is way too high. The BMS will presumably lower that to something reasonable, but probably at the cost of a lot of waste heat while charging, and you'll get less than 11v out of the resulting battery pack. With four 3.2v LiFePo4 cells, instead, you get 12.6v, which is a perfect match for a lead-acid battery, and you get the longevity and safety of LiFePo4, too. Where do you get your 32700 or 33140 LiFePo4 cells, are you pleased with their quality, and what BMS do you use?
@@ncdave4life BMS won't lower charging voltage, it just disconnect batteries. I got batteries in local store in UA, I use 60/100A "white board" BMS with balabcer from Ali, it has variants for li-ion and for lifepo4 (different chips) and from 3s to 5s (can be changed)
@@Sobakin76, thank you!
@@ncdave4lifeI heard a comment on another video that the solution to mismatched battery/device would be to go to around 24v 7s and then using a buck converter to bring to down to a steady 12 volts with a desired amperage. Have you ever heard that before and hows that sound to you? Thanks!
@@Once_in_a_Lifetime, sorry, I don't know.
I would’ve bought a project box rather than risk exposing myself to the lead and acid.
I was going a little insane that there seemed to be some solder rationing happening - a little solder on each surface will help them stick better/faster and longer/more reliably
Would that BMS allow you to connect any type of charger, provided the voltage matches of course? I'm asking because you usually need specific chargers for specific types of batteries. Can't use a NiMH charger for a LiON battery for instance.
Also, I hope you checked that all the batteries have similar wear conditions.
Nope. Most BMS do not contain a voltage regulator. They only provide over-/under-voltage protection by cutting off the cells, if the voltage leaves the safe range.
You need a CCCV charger rated for the nominal cell voltage times the number of serial cells. For this, you need a Li-Ion charger providing 3*4.2V (or so, depends on the charge end voltage of the cells). Those chargers safely limit the current by reducing the voltage dynamically.
If you use a plain power brick, the cells will absorb as much current as the source provides, overheating the weakest component. You burn the charger, cells, wires or trip the fuse. Even if the power brick rectifier does not burn, the high current will drain the capacitors responsible for smoothing the AC power, aging them much faster.
Gayet güzel bir çalışma, tebrikler. Bu aküye bir şarj soketi bir de basit 3 ya da 4 kademeli şarj durumu göstergesi de ekleseydiniz on numara beş yıldız olurdu.
First time I've watched one of your videos. LIKED and SUBSCRIBED!
The level of innovation and skill was simply put, incredible!
Thank you very much my Friend🙏🙂
@@ErCanEverything Your Welcome 😁🙏
I love the bottle idea so much!😎
I'm glad you liked it my Friend🙂🤝🍀
I made a 3s 3p 18650 pack and use it all the time for running a electric fuel pump. It works great!
And I sometimes use this battery to inflate car tires or my kids' bike tires.
And I am very pleased🙌🙂
we are professional manufacturer for nickel strips and cell holders of those kinds of products!
🤦
What was the machine you used at the end of the project?? Did you make it yourself? If so, do you have a DIY video on that gadget??
Good idea, though you can actually buy pre-made cases (with cell holders) so you can just make a 11.1V Li-Ion battery pack without needing to destroy a 12V lead acid battery in the process.
Where?
3s liion for 12v is a little bit short... 13.2v /4 = 4.4, knowing that max voltage for each cell is 4.2...
There's sensitive electronics that doesn't handle over voltage
If you're going to spend the money on all those 18650s, you might as well spring for another $10 and actually buy a shell along with that charging board that's made for what you're making. Then you don't have to deal with poisonous battery bits. Soda bottle heat drink ideas fantastic though. Plastic bottles are blow molded so when you heat them they shrink, good idea.
Then in the minute 20:21 how did You restart the bms, because I have done various of these bateries, when a cell series rises 4.24v it breaks the bms output, and I had to unsolder it to the batteries. How do You solve this problem?
In my situation, when it reaches 12.90V, it switches off the input voltage to the batteries and the voltage is displayed at 12.19V.
Then, when I connect a consumer, for example a lamp, the lamp starts to light up and the voltage becomes 12.6 ~ 12.7V
20:20 The bench PSU was shut off because the over charge protection (battery BMS) turned off the charge, the battery voltage was over 12.9V which is too much for a 3S Lithium Ion battery pack.
Li-Ion cells should not be charged to anything higher than 4.2V per cell, which is 12.6V total. So you need to set your power supply to 12.6V and wait until it drops down to a very low charging current.
You are absolutely right.
I wanted to show you that the BMS automatically shuts off once it reaches a critical voltage for the batteries.
I set the power supply above 13V to show you that the BMS works, but the current must be observed according to the numbers of batteries and the manufacturer's specifications.🙂
This battery is not available to a car or motorcycle. Because in those voltage is on 14.2volt level. Simply acid battery can be loaded by 16.2 voltage. Maybe we can take one liion battery more on one cell than a capacity. Then in the loading process we have 12.6 plus 4.2 and will be 16.8. And in the lowest lvl of voltage will be 3.3 x 4 equals 13.2volt. A little more than we need. 14.2 is the limit of loading in cars/motorcycle. And this is a little under we want. In the past I think about this kind of battery and this kind of problem. But if we want a good capacity of power bank we have a good one sample on the move. Good job.
@@budzio135 Car or motorcycle batteries will usually be much larger than 7Ah. Car batteries in particular will be about 80Ah or more, so this small battery will not be able to replace a car battery. However, for 12V appliances that need a lot of power and need to be portable, this battery pack is ideal. So boomboxes, portable televisions, etc. I will probably make one myself for a 12V car clock, which has always been known to chew batteries.
@@TheSpotify95 there are lithium battery for cars but are too much in parallel..to handle 100_300amp should 40_50 lithium battery in parallel and 3_4 in series..of course a powerful charger..fo fast charging constant current charging...
I love that home made copper busbar
lol.. everything was great, but u forgot cover the 12v output inside the case , which can make serious damage... i loved the way u used bottle plastic to cover the battery
But what about these cells? How would you find promising 18650 which will keep it's original capacity for say like 1 year....
MOST HAVE NO IDEA THEY CAN USE THE BOTTLES LIKE THAT. BUT IT WORKS GREAT. GIVES YOU A REALLY THICK PROTECTION. AND IT COOLS REAL TIGHT
I was supprised when I saw here that old bottle can be also used this way! will use this on my own next battery project! thanks for this :) very help and useful
Gracias excelente ilustración, lo hace ver tan fácil, gracias
Thank you very much🙏🙂🤝
Can you tell me what you use to charge the pack? Nice build!
7:50 how nicely it fit 😍
Other than a 3S 8P 18650 pack being significantly less than 12V for most of its discharge cycle and possible fire risk, bravo. Being a nominal 11.1 volts may or may not be a problem depending on what you use it for.
"possible fire risk, bravo" .... i don't get it
@@balloney2175 Bravo for doing a good job other than the 2 problems. (not 12v and it possibly being a fire risk)
Hi there, I'm building a battery pack very similar to yours, and I was not sure what BMS or power shear board to use, and so I learned which one is going to work from your video build, very nice job..😎👍
PS. I also like how you used the plastic bottle as the insulation for the battery's cells, Nice 👍
Thank you🙂🤝
Can this battery pack be connected on series? My ups needs 2 of this in series (24 volts)
Is all the spare parts available online ??
Awsome man! Wish I was that electronically smart ......definitely use the plastic bottle trick now! 👍👍👍👍
Thank you for the kind words my Friend🙂♥️🤝
@@ErCanEverythingDude made his own copper strip and a heat shrink using bottle, I am really impressed
Where did you buy the batteries and circuit controllers from ?, thanks 😊
I bought the batteries from someone who replaces defective electric scooter batteries. The BMS and QC modules are from Aliexpress, the links are in the video description.🙂
@@ErCanEverything would salvaged batteries from broken laptop battery pack work?
@@romanshorif2330 Yes, they have identical parameters
Has anyone tried using these in a UPS backup unit? and if so, how effective are they? I have several 2200 watt units that I would love to see converted into a more reliable battery type.
For the cost of 18650 cells including BMS, im pretty sure you can stay with old acid ones. Not only they are much more cheaper, but in the end you can recycle them for couple bucks to save that for the another one. More reliable battery type is LiFePO4 but check them out how much they cost. UPS is not constantly discharged to like half of the SOC. They ment to be used as a backup system and once in a while power outage can occur. Lithium technology is only suitable for on/off grid solar systems, laptops, phones, hand-held gaming consoles and some other kind of stuff. My friend has pretty big solar system and got him thinking where to store energy, so he start calculating and what he came up with was unbelievable. Just one lead acid 12V 180Ah battery costs almost half of the price of 18650 cells and he calculated dat he needs 16 of them to get 48V and some capacity to NOT discharge them below 60% SOC. One battery is for 150€, 16 of them 2400€. Total watt hours? 34kWh for just 2400. And he never change them since 2017, still have plenty of capacity to play with
Parabéns amigo ficou muito bem feito gostaria muito do esquema detalhado
you need 4S lifepo4 configuration to match VRLA working range. 3S li-on will not work in 12v application
In this video you can see how it works on UPS
th-cam.com/video/cf-4e0qoOVM/w-d-xo.html
@@ErCanEverything It can't work properly. 12V application will try to charge battery to 13.8-14.4 volts. BMS will cut off overcharge, UPS will loose battery. If you wanna use it as USB power bank, that's another question :)
Very nice build!
And I would add a way to see/test the remaining capacity, Voltage & Ampèrage of the battery!
Thank you🙂🤝
Really?
太复杂！
在每个电池一端都用
细电线当过流保险丝
不是更好而且更简单？
I'm in the middle of doing the same thing, have you for a link for that fast charge USB module. Thanks
Link in the description.
Thank you🙂
Good job 👍and I'll probably steal the idea with that bottle ;-)
Thanks buddy🤝🍻
They are really very helpful👍
Nevieš kde nabral 50 400mAh ?😂
If you carefully read the title and the description, I wrote there that it is 12V 16.8A, but if we calculate it as a Power Bank, it is equivalent to a 50400mAh Power Bank. if we connect all 24 x 2100mAh batteries in parallel then it becomes 3.6V 50400mAh which is equal to 181.44W
@@MsBogdos Tipujem že to bude kapacita pri 5V výstupnom napäti z powerbanky. Keď to má pri 12V 16.8Ah tak pri 5V by to mohlo byť 50Ah ale prepočítavať to a kontrolovať to určite nebudem.
This is on another level. Very nice job.
❤️❤️❤️
Hello, I have a question, can I connect to the BMS 3S board, not 18650, but batteries from touch phones??? to have 12 volts???
Should have included the bottom of bottle for shrink wrap. This was an awesome project! Thanks for sharing. Needs a charge status indicator.
The bottom of plastic bottle like that are hard. Must use water bottle plastic bottle bottom are soft
Yeah I really had to put a charge indicator on it
Very creative. Very nice design and build. I will have to get brave and try this sometime.
Thanks for the kind words🙂🤝, but you have to be very careful with the batteries!
Wow its very nice mate, and i like the way you use the bottle, its nice idea 👍👍👍
Yes, these bottles are very useful.
Thank you my Friend🙏🤝🤝🤝
5:37 First time I've seen this, luv it.
I'm glad you liked it🙂🤝
How about second version? Without overheating batteries and components on modules, also would be nice gluing it together without rollercoaster hand holding so the glue won't jump all over the place and make the possibility to change batteries...
It's much more useful if you go for LiFePO4 4s rather the Lipo 3s... The 3s won't match alternators and other 12v systems properly.
Exactly. 4.3x3= only 12.9V. But usual chargers give 14+V. So it will be 4.7v per cell. It is well too much. May explode.
Good time chewing video watch but here are some points. The pack is 3S and not 4S thus voltage output and charge voltages lower. Lead-Acid (LA) runs very different volatages and current flows on output and charge. Putting Lithium into a case designed and configured to plug in LA applications just doesn't work without changes to the system feeding to/from it. So many have gone down path of trying to run UPS's of these turds and find it sucks bad, especially with 3S. If you wanna build a power bank, put it in a different container/package.
Initially I also thought that the voltage would be low, but they are almost identical. the minimum voltage for LA batteries is around 10 ~ 10,5V, for 3S it is 9.6~9.9V, I even made a 3S 22Ah Li-ion UPS pack and so far I have no problems.
th-cam.com/video/cf-4e0qoOVM/w-d-xo.html
Usta böyle bı aküyü Max kaç amper ile şarj edebilirz. Tek pil başına 1a dersek 8 pil var 16a ile şarj edebilirsiniz?
На это хочется смотреть бесконечно😌😌Человек - гений👍.
Что тут гениального? Зашёл на али купил комплектующие и спаял. делов то.
I probably would have doubled up the copper strips to make sure they could handle the current going through them, but its not for a vehicle like i originally thought so i guess it doesnt matter.
The maximum discharge current of these batteries is 5A total 40A.
I don't think I'll load it more than 40A because that will destroy the batteries
@@ErCanEverything Yeah, after i saw what it was gonna be used for i disregarded the need for extra copper..
Wires on bms needs to be on same lengths and gauge sizes to have similar resistance for accurate voltage balancing.
And you can atleast put a voltage indicator to let you know the charge level..
There was no space for a voltmeter but I will add an external small voltmeter
Not quite correct in regards to voltage balancing, as the voltage balancing only occurs during the charging cycle at lowered current.
Hence the resistance of the wires in the BMS Monitoring path (Resistivity * cross-sectional area * length) is not a significant factor during the charge cycle
Where the wire size does matter is in the discharge path - the cell to cell connections, the Cell Bank +ve & - ve to BMS B+ & B - , and the BMS P+ & P - to the External Case Terminals.
That was a pleasure to watch, Subbed.
I'm glad you liked it my Friend🙂🤝❤️
ErCan nice project 👍just be very careful with a hot air gun! take care my Friend
Thank you my Friend🙏🤝
Great build but do you think maybe some better thicker cable to the 12volt terminals would be good. They must have got very hot with that halogen lamp.😊
Great!
I like the choice of music.
I wish you add subs describing what you are doing.
Thank you🙂
Bro how do you charge when you insert it into a motorcycle...can I directly connect 12 from bike to the battery?
I connected it directly because BMS protects against overcharging as soon as the battery reaches 12.6 ~ 12.8V.
In this video you can see how the charging stops at 20:10min
👉th-cam.com/video/2xirwLUWW-U/w-d-xo.html
would something like this be suitable to replace an old lead acid battery in a PC battery backup system?
It can also be used in PC battery backup system and this is the video
th-cam.com/video/cf-4e0qoOVM/w-d-xo.html
complex, difficult to implement for a normal guy, but really creative idea
Thank you very much🙂🤝
Muito bom! Top
C'est du très bon travail d'un professionnel comme vous. J'ai beaucoup bénéficié de vous.
Wow, this pack would have juice to charge whole family's phones on picnic 😉. Great project again! Where from you salvaged this much batteries?
Yes very practical for a picnic.
Some time ago I bought them cheap, they were from an electric scooter🙂
Step the game up, use yourself some cell spacers. At the very least put something between the cells. Only the worst packs on the market will ever have cells touching each other. I can personally attest to that.
Nice
big thumbs up. That is awesome and the bottle shrink wrap was genius
Thank you🙂
Hello, there's one piece of information I didn't see, which port is used for recharging, the + and - battery terminals, as would be the case with a car battery charger, for example?
From what i have seen when using bms’s is the same terminals for discharging is used for charging. Don’t know if you heard anything contrary to that.
could you please share the circuit diagram for benefit of learning
These has been my challenge with these lithium ion batteries. Full charge is 12.6v. Without using dedicated lithium ion battery charger, you will not get the full charge. Other charges will cut off at 12v or a little above that. So, how do you solve this challenge?
No, think about it some more. Dangerous idea building Lithium into Lead-Acid cases.
It was an LA battery from a UPS whose charging voltage is 13.7V. I made a 3S 8P Li-ion battery that can be charged at a maximum of 12A, I don't believe the UPS charger will exceed 4A which will not affect this pack. And once the voltage reaches 12.7~ 12.8V, the BMS will automatically stop charging
@@ErCanEverything and totally different voltage profile to what the UPS is expecting thus you won't get anywhere near a deep discharge or most of the actuall current Lithium can produce. Unless you have a lithium configured UPS, stick with a chemistry it is designed for. Besides, 3S is a cheap way out from using 4S.
Wow cool, I'm going to copy this almost exactly. Question. What would happen in I added a 9th battery on each row of 3? Would capacity just go up? or would the bms not function properly be used it would make voltage go up instead.
Could this be used as a drop in replacement for a UPS battery?
Yes it can be replaced with ups battery
th-cam.com/video/cf-4e0qoOVM/w-d-xo.html
No. 3s 3.7v battery wont work, you need 4s 3.2V Lifepo4 to match VRLA working range.
@@alexsiniov In this video you can see how it works in UPS
th-cam.com/video/cf-4e0qoOVM/w-d-xo.html
Heat shrinking …….Genius !
This video has 322K views, so maybe it will bе interesting for YOU.
DIY 20 000 mAh QC3.0 Supported Parkside Power Bank from 20V 4Ah Parkside Battery! Just for $1
👉th-cam.com/video/vRydMn5B3CM/w-d-xo.html
Parkside tools rock!
Very satisfying video tutorial and clean workkkkkk Nice job bro👍👍👍👍👍🥹
Бутылка?!Это находка!!!🤔👍👏
Thank you🙏🙂
Sorry, but your execution of this idea has so many flaws that it's seriously dangerous if used for any other purpose than as a USB Powerbank.
1. WHY DESTROY A 12V 7Ah SLA JUST TO GET A PLASTIC CASE?
Sell it for recycling and use the cash to buy a NEW EMPTY CASE (Complete with Nickel straps, Cell holders and the same 3S7P-40A BMS) off AliExpress.
2. Good soldering requires mechanical as well as electrical connection. Relying on just the solder joint is downright dangerous - the slightest imperfection in soldering or overcurrent will cause the joint to fail through high resistance.
3. I like the idea of hammering heavy copper wire into strip form, but it doesn't have sufficient cross-sectional area to carry the possible maximum current draw from the battery Cell String. Make your connections from the Cell String to the BMS from the centre of the String rather than the end. That might prevent the solder joints from melting or the copper strip becoming a fuse. A 55W Headlight globe drawing just over 4 Amps is hardly a good test of a 40A+ capability.
4. While the wire Guage used is fine for recharging or running the USB Converter, it is way too thin to carry the 40 Amps continuous (70A+ startup) that at the BMS is capable of supplying.
5. The BMS is primarily designed for a 3x7 18650 LIPO Cell configuration, but will work fine with 3x8 Cells or any 3xX Cell configuration with the corresponding capacity, current and charging limitations. Don't mix cells with differing current, capacity or Voltages.
6. Using the plastic bottle as shrink-wrap is an old but conceptually good idea. However in this case it's way too thick and acts as insulation to concentrate the heat from the cells leaving the heat nowhere to go - you're risking the cells overheating which could be disastrous!
7. Using "recovered" or "second-hand" cells adds further to the risks, just to cut costs.
8. The commercial Lithium Battery replacements for the 7Ah 12V SLA use Lithium Iron Phosphate (LiFePO4) Cell chemistry NOT Lithium Ion Polymer (LIPO)
I'll leave it there - CAVEAT EMPTOR - if you buy into this without knowing what you're doing then you are taking a serious risk.
😉
Nice project. Double capacity in the same volume. What is the difference in weight between the original battery and the new Li-Ion version?
cost 5x more :/
Excellent skills and workmanship!
Thank you🙏🙂🤝
Get a box. Do not cut open lead acid battery. 😐
Трябва да ти призная, че имаш много прецизни ръце. Евалла!
Благодаря ти Приятелю🙏🤝
Здравствуйте. Подскажите при каком напряжении отключается плата QC3.0 ? Я купил такую плату и она отключается при 10.2v, хотя написано минимум 6v.
Hi, to be honest I haven't measured the minimum operating voltage. but with an 18V battery, I haven't had a problem so far
Может брак попался. У меня работает такая плата от 6 вольт. Но так как там нет повышающего преобразователя, чтобы работала как быстрая зарядка нужно и напряжение соответствующее. Т.е. если ваш тел поддерживает 9 вольт то напряжение выше должно быть, если 12 соответственно. А при 6 вольтах будет работать как обычная на 5в.
C’est excellent merci beaucoup pour l’exercice 👍✌️👏💐🌺🌹
Did you place the temperature sensor between the cells or only on top?
I didn't place a temperature sensor
@@ErCanEverything So there's no thermal protection at all?