I started to watch this video out of curiosity then halfway through I realized that I'm never going to do this. When I have a battery that fails I'll return it if under warranty or recycle it. So, I stopped watching. It's not a bad video, I'm just never going to spend the effort or time to replace dead cells. I'll just go down to Home Depot and purchase new...

What apps i need to use for this

Fanatic of the channel !

How many used laptops did you have to buy to get this many? And how much could that have cost vs battery purchases?

What bms are you using and how many? Do you have your components listed somewhere?

I always thought it best to have a FET per cell to deactivate electronically.

do you charge the cells in parralell and if so how many at a time what voltage and amps

Its a bomb of batteries😂

It's very dangerous if it overheat or damage

Nice work! I wanna diy a 18650/21700 battery pack，could you please tell me which spot welder works well and where to buy one？Thanks!

Beware that the positive end is also a fuse. If you replace that with your own nickel strip there is no fuse anymore ...

THEY BOTH COME FROM CHINA.

thanks so much for doing this video, I have always been concerned how to correctly assess dead or low voltage batteries so I appreciate your help.

Hi, I just have had à look to that, just reverse the fan and find the correct angular position to align the fan branch to the aluminum branch 😊 it is just bad mounting instruction at the factory...

Thanks alot for taking time and effort and money to take apart a well built unit like this. This will most definitely improve diy builts of others on the long run!

Just saved me from buying crap 18650 cells on temu. Ultrafire cells 18 for about $24

so green brand new unused and useless shame about all the children who dug up the lithium ore electric its the future

ALL batteries are never in my home. They are in a custom steel encasement 50 yards away from the home. That goes through an underground steel pipe weather proof into the home. If there is a fire it will never touch the home.

Hi I have just bought the same battery secondhand iv no idea how to wire yet wow is this battery 500v? I'm sure it has a sticker on mine that says 50v? 😮

What is the principle of welding batteries? I understand the basics and that the welding spot should have the highest temperature for the shortest time. We have a spotter with a bunch of settings: first welding, second and third, where the second welding is the main welding and the third is hardening. There are also peripheral settings such as pause between pulses, current rise and fall times. So let's get down to business: the first and last welds should not have as high a current as the second. The first weld prepares the nickel strip for welding, the second welds it directly, and the third releases the strip. We have two main problems that I still can't figure out: 1. Why do the electrodes "stick" to the workpiece? According to my observations, this is due to the cross-sectional area of the electrode tip in contact with the nickel tape. On the one hand, a smaller contact area creates better welding, but the electrodes stick 👉👈 On the other hand, a larger area cooks worse. By increasing the current, the workpiece overheated too much and still nothing happened) 2. One electrode cooks and the other does not. In the case of DC welding, this is understandable. The "positive" electrode, where the current enters the battery substrate, welds better than the "negative" electrode, where the current leaves the battery. However, with AC welding, this is illogical for me, because the current flows back and forth across the workpiece. Maybe someone has a few gigabytes of information about welding batteries?) I want to absorb all the text from anyone that is related to welding batteries

That on button inside poison smell strong not even plastic smell every time after boil and pick up that kettle to pour horrible strong substance smell ? same with oven before so never used except only stove but what why is that smell is not Normal at all despite equipment works normal ?

You mathed wrong. It is a 415% difference

Numb question: recently secured *nickel wire* - 24 gauge/0.5mm - as a sorta-fuse wire. (Ebike batteries, 10+ cells in parallel…) Wire seems a bit harder to counterfeit, too. Lots of nickel-plated strip sold as 200 99.6% nickel. I’ll need to tin the wire prior to spot-welding, of course - solder pot time, with acid flux; will need serious cleaning beforehand! - and then using a jig to keep the wires lined up…

Good info,but u guys are environment hazard,wit the fuck you do with all them batts..us nat gas and save the earth

Good morning why not use nickel strips per point and put a bms? That would be easier, right? THANKS

Good morning why not use nickel strips per point and put a bms? That would be easier, right? THANKS

I coulda told you this from the previous video LOL... which is why my comment was BRUH

bruh...

never trust on a Jpnz 😅

I’m from the states America course jackass both countries I get it but I was gonna say take a tub of kitty litter and put it in there and I’ll suck all the moisture out of that container for you if you’re in a high moisture area

I have a myenergy how to set them up mine keeps saying waiting for surplus is it working properly

why no bms? isnt it risky?

I'm new to this, absolutely no experience. Buuut : If the balancer stops the current flow, before measuring the voltage, then cable length does not matter (and because of that, it should do it like that, but maybe it does not). If it does not, and measures voltage while balancing, then you're possible better of having them all the same length (when a current flows, you get a voltage drop because of the resistance in the wire (veeery little, but not zero)). ...... In general, wires/cables are better of just laying messy around with lots of space in between. If you strap'em close together you have started (somehow) to create a transformer, and if you then run AC (alternating) current through one of the "transformer" wires, then you get a induced current in the very very nearby wires. ...... But that's or AC. ....... Here it's DC, and I'm not sure now, but for DC, I think it doesn't matter (no induction). ......... So my guess is that the firmware is measuring the voltage while balancing, and then the cable lengths should be exactly the same, idealy,....... but if it matters ?,....... probably not. ......... The guy who sugested that the balancing was only done with adjacent cells, maybe he's correct, as the bars on your display could match such a process. But I fail to see why a balancer has to be engineered like that, except, it's probably cheaper to produce like that. .... If this guy is correct however : kzfaq.info/get/bejne/mKx_fcen3c6ukqM.html ......... then there possibly are kind of AC currents flowing back/forth in the balancing wires. .......... And if he's correct, that neighbour only balancing is not the case (maybe is in the BMS ?).

Thank you for taking the time for the video! I have one comment about the fitment - I have a total of 5 after market batteries, 2 very similar to the 9Ah ones you have tested and ALL of them have Perfect fitment (so far). I honestly suspect that during re-assembly something was not aligned properly in the after market battery causing the poor fitment. I imagine it is possible that it is indeed made with poor fitment but that is not what I have experienced buying from 3 different vendors. Overall I am very impressed with the 9Ah AM you have tested as it is a LOT better than the ones I just bought at 4 for $109 which I suspect weigh about half as much as the one you have here.

This could be my dream work 😁but i'm not lucky to get aportunity

Hi, Which wire got hotter negative or positive. The wire that goes to the load, which one should be shorter negative pr positive? I will be making a battery and one of the wires that goes to the load will be longer than the other. Should the longer wire be positive or negative? Thank you

How often would you need to access the unit should it be easily accessible?

the battery probably popped because of a thermal failure... I appreciate that you posted the video anyways...

Wire length should not matter all that much for capacitor balancers, they basically connect caps to each cell, then switch so the caps are all connected parallel together, then switch back to being connected to the cells... this makes them level out as if you have all the cells connected in parallel... just slower because of impedance. Wire length probably matters more for the inductive balancer types but they have the own issues, especially when used in large strings since they only transfer bank to bank so if you have a high bank, it will transfer to the low banks next to it, and then to the ones next to that and so on making a ramp as they stop balancing once they reach a certain voltage difference. Now what will matter is wire resistance. The better connection, shorter the wire, and thicker the wire, the lower resistance and the more current you can get, however, the current is proportional to the voltage difference between each cell... and all cells balance at the same time which is a nice feature for larger packs with more series cells or banks... the inductive type is not as good for this but for smaller packs they are nice and tiny. An inductive balancer might sometimes move more current per unit difference in voltage, but I think that would depend on if the chips are designed to compensate like that. The transformer balancers can move a shocking amount of current but are more pricey. These balancers are really meant to be left alone, set and forget, they take very little power (basically only enough to run a small oscillator and switch some MOSFETs), and they do not have any brains that can get confused, they connect and disconnect capacitors so that they move charges from all higher cells to all lower cells at the same time. But I have seen guys using batteries with flat curves... these can screw them up because the voltage difference are not from different state of charge, just different connector resistances, so they only run the balancer when the batteries are charged up so they have a difference in voltage from full to almost full. For the cells I scavenge (LCO, NMC, usually 18650 case), not that big of a deal since the cells have a more linear discharge curve so the balancer wont possibly screw with a top balance, but for LiFePO4, you might want to check if that is the issue, I suggest a little voltage trigger, one guy used a relay board but I hate relays because they're mechanical and take lots of current compared to a MOSFET.

What does error e1 mean

Where can I get the wall mount you use?

Hello, i see your video and i think try your method. Do you ever see this xbox series x, we have an electrical shut down and when power back at home this xbox just never put display on tv. Console power up and 30 or 40 sec after she's power off. Not possible to hard reset too. I try her many tv and nothing to do.

Dear, May I know if all the cells should have capacity testing before assembling?

He using near dead cells. Would be constantly looking for bad cells. Good luck

what is the longevity of those battery cells? How were your experience over 3 years? I believe those cell has some sort of life cycle up to 300 charge/discharge. Thanks

working barefoot with heavy objects

👍👍