Take *note* (ha ha) that apple sources a lot of their batteries and screens from samsung. Apple makes a good phone in my opinion, but their busniess model and pricing is what I dislike them for.
... 3 things which will prevent this from exploding : 1# use a better charging controller 2# dont use diffrent sized capacity/voltaged batteries 3# do not create such things
Actually the different size/capacity is not a problem at all because of the way he's using them. He has them wired in parallel as one gigantic cell. Any difference in capacity or charging doesn't matter because the cells will always equalize among themselves. Say you had one cell at 3.2 volts and the others at 4.2. The moment he soldered them together, the 3.2 would have started charging off the others, and the 4.2's would have lost voltage until they were all equal and the same voltage. The same when charging up. This is how most ultrabook batteries are set up, with different sized cells spread all over the interior volume of the device, but running in parallel.
I do agree that I wouldn't trust that charge controller. As for your #2 @Subparanon already told you the facts. #3 I made an ebike battery using 130 18650 cells. It is setup in a 13s10p format. Nothing pisses me off more than ignorant people telling me that I'll blow my self up.
@@Subparanon Parallel-connected batteries with different capacities are charged / discharged unevenly. The battery with the lowest capacity will be charged first, and the battery with the highest capacity will always be undercharged.
Good job, the only thing I would have done different would be to add an external charge port that could be hooked to a rc car battery charger....the charger in the input is at best 1000 mah.... so 50 hours to recharge it
I don’t get why people are so against this All the cells are in parallel so the capacity of the cells adds up and doesn’t matter the size of the cell. There are no cells in series so people complaining about no balancing are fear mongering. The PCB has built in protection for over current, short circuit, overcharge, under charge, over temperature and will disconnect the battery if there’s any issues. As far as the 8v goes that’s how it charges quickly. Say you have a cable rated at 2 amps, under standard usb 5v you will have 10 watts available but if you raise the voltage to 8v still with 2 amps you now have 16 watts without burning your cable. Now the pcb will take that 8v and use a buck converter to lower the voltage to li ion charging Levels of 2.8-4.35v
50,000mAh is crazy for a powerbank and it would take ages to charge up! I'd also be very dubious of how those Macbook battery cells were arranged together. Personally, I'd have used 18650s in parallel, and to a more modest capacity (one that won't take hours to charge up), thus saving the Macbook battery cells for something else. Plus, the whole pack will be limited by the weakest cell - if one cell fails, the whole pack goes. You also need to run a capacity test on those cells to see how much capacity they have left!
Those mac batteries are 3.8v nominal and 4.35v full charged, not the standard 3.7v / 4.2v batteries. It needs a special charger. Also cells were not tested. What to say about different capacities mixed in the pack. It's a complete fail setup & implementation.
I think it might be important to state that everything he is doing in this video is incredibly wrong and will likely lead to an explosion/fire in the future! DO NOT TRY THIS AT HOME, he doesn’t know what he is doing
@@justADeni why is the voltage 8v? because this is a fast charging battery, the output voltage of fast charging is dc3.6-6 volt 3 ampere, 6-9v 2a, and 9-12v 1.5a
Protective card must be on each battery. Then the difference in capacity between the batteries will not matter. But the total capacity will need to be measured by the weakest battery.
When they are in parrallel they all balance each other the higher capacity cells will drain into the smaller ones so they stay at the same voltage the same as parrallel charging
They will drain each other out of control. High drain continuously will stressed the battery. All lithium or polymer battery have short life cycle. Charging the battery in this condition will make battery more hot and soon it will die.
1. The batteries are in parallel so no need of any balancing 2. The board included is a 1s balanced charger which will charge the batteries efficiently, 3. Different batteries capacities doesn't matter so far the cells are in parallel, it's just like 10 people pushing on a car, all their power combined will move the car regardless of the stronger or weaker person. 4. This is common sense, I don't think it's common anymore lols
I think the more likely problem is heat from constant, uncontrollable discharge on the larger batteries to keep the smaller ones charged. This might lead to fires or even an explosion.
Nope! Some were at about 3.8V and 50% SOC, whilst some were at 4.15V and almost fully charged. Thankfully, with them all being in parallel, they'll equalize themselves, and there wasn't too much of a voltage difference, so they should have been OK. Still, I wouldn't make a battery like this. I would balance them first, and I wouldn't use random mismatched cells that all have different sizes & different capacities. I'd also check the capacity of the cells first - no good connecting a good cell (high capacity, low internal resistance) with a bad cell (high internal resistance and low capacity).
Если вдруг, кто-то кто знает русский язык заглянет сюда, то я хочу сделать поправку: нагревать термоусадку одетую на аккумы - это опасно. Лучше смотать изолентой
Those mac batteries are 3.8v nominal and 4.35v full charged, not the standard 3.7v / 4.2v batteries. It needs a special charger. Also cells were not tested. What to say about different capacities mixed in the pack. It's a complete fail setup & implementation.
Most of them are retarded anyway. They literally have no idea what they are talking about, some of the worst are the dumbass comments about the 8v because they are too stupid to know what QC 2.0 is.
@@OhSoTiredMan Nothing wrong with the build as far as i can see. The only thing i would have done differently is charge the batteries up before installing them so their voltage is roughly the same from the start but the QC module he installed will have a balancing module on the board anyway as well as over charge/over discharge protection. The comments claiming its unsafe are as stupid as the morons that dont know what QC 3.0 is.
I have a few power banks I built, most are 4.5ah to 6ah, I have one that's 15ah plus, and I'm going to build one about 20ah with 8 USB out, and 9watt led light, being off grid, its good to have power and light, I have a 118ah 4s LiFePo4 bank, that is solar charged with 300watta solar, its for led lighting, radio, and has USB output, I'm thinking about adding a 12v- 120vac inverter, of about 800-1kw, so incase my main 24v systen goes down, I can keep my fridge going and have TV! I need to figure how long 118ah will last! Great video!!!
@If Perkov Why do people think this? the batteries will happily take a charge till they are all full but this will put a lot of strain on the lower capacity batteries, if you charge past the capacity of the lower capacity cells then you have created a constantly discharging larger cell and a constantly overcharging smaller cell, this creates what is commonly known as death!
Where did you get all the tools, the bins and drawers full of materials at your disposal? This is what I desire in my own shop but this takes time to achieve and years of collecting.
@@krazy8947 imagina essa facilidade aqui no Brasil, vc se vira e da de cara com todos os tipos componentes eletrônicos, e vc se sente realizado, para vários projetos
Each cell should have overcharge/discharge/temperature protection circuits since they are of different ratings. For the total optimal capacity of the pack, a good balancing circuit should be implemented
Those mac batteries are 3.8v nominal and 4.35v full charged, not the standard 3.7v / 4.2v batteries. It needs a special charger. Also cells were not tested. What to say about different capacities mixed in the pack. It's a complete fail setup & implementation.
It's totally safe other than the fact of those kinda blunt ridges in the case but he kinda held it in place with double sided tape I guess? Also kinda wished he check the capacity of the cells and if there is any self discharging cells since one cell can actually drains the whole pack. Other than that I kinda dig it, I make some electronic projects too and it amazes me how many amazing components people throw out such as transformers and such.
Если плата поддерживает QC 3.0, то заряжаться будет мощностью в 18 ватт. Батарея емкостью 50ач*3.7в=185 Вт*ч, соответственно 185втч/18вт=10 часов при максимальном токе заряда. Если быть реалистичным, то часов за 12-13 зарядится полностью.
@step sister if u know what i mean you really need to pay attention to physics,amp (A) is a measurement of current ,while amphour (AH) is measurement of capacity.just like km is distance and kmph is speed
@step sister if u know what i mean As you are saying above that amps is the same as amp hours then I´m sure you don´t mind saying wrong units to other stuff either (maybe you do not even know what the difference is, other than a letter). What you are saying is that it is ok to say "My cars fuel consumption is 8 liters" or "While jogging, my maximum speed is 10 kilometers" or "My electricity bill was last month 200 kW". All those three examples are totally nonsence and the only outcome is that you make yourself sound like the worlds biggest idiot when using them or some other similar "short forms for units".
@@mikahandony1562 when I first seen it quickly I thoguht they were from a phone then I seen they were from a PC or laptop.as I watched partial before I commented.
Kids, the batteries are in parallel, no balancer needed. You can also mix small and big batteries they won't explode. If they are at 4.20v then they are at 4.20, they won't get higher. Learn before sharing wrong thoughts :)
but watch again what he doing, he was tested all batteries and shows different voltage, he rather soldered all batteries in parralel than fully charge each battery before
@@azharschecter7076 I propbably skipped ahead too much to see that. But i approve, they should at least be at the same level or near the voltage of the others
When a small cell (let's say 1Ah) is connected in parallel with a large cell (let's say 3Ah) and a load is applied to them, the small cell will lose it's charge quicker, therefore lowering it's voltage. The bigger cell will compensate this by supplying current at it's max output to the smaller cell to charge it up (why max current? Simple, no limiting factors other than the internal resistance of the batteries.). This will destroy the batteries over time and create heat.
You need to learn about lipos, when a higher capacity bat y connected to a small capacity bat, the big is going to charge the smaller with a lots of amps
