Exploring A CHEAP 3-cell BMS Board!
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- เผยแพร่เมื่อ 25 มี.ค. 2022
- Taking a look at the features of an AliExpress BMS board with help from PCBWay: www.pcbway.com/setinvite.aspx...
Get yours here:
PCB: www.pcbway.com/project/sharep...
BMS Board: s.click.aliexpress.com/e/_9GhEgJ (3s 60A Balance)
18650 Holder: s.click.aliexpress.com/e/_AtqLkT
Binding Posts: s.click.aliexpress.com/e/_ASeBQX
Pin Headers: s.click.aliexpress.com/e/_A4nYkX
Jumpers: s.click.aliexpress.com/e/_9iD1eX
M3 bolts: s.click.aliexpress.com/e/_ASMght (M3x10mm)
Print your own case: github.com/SimpleElectronicsY...
Need some 18650s to go with it?
(USA): amzn.to/3ICkic2
(Canada): amzn.to/3LaXuBU
(International): s.click.aliexpress.com/e/_ASmeph
Here are the flying capacitor balancers: s.click.aliexpress.com/e/_AqgDX1
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Oh no - what was I thinking - "430" on a resistor is 43 and ZERO (no) Zeros, so 43 ohms - I'm going to let it ride. Thanks @Marsha Jackson !
Those 18650 holders have a ton of resistance. I did a little video on the difference in resistance between some of the cell holders I have and the Keystone SMD style cell holders have the lowest resistance of any cell holders out there.
I bought a similar charging board to this last year, but for 2 18650's. I could'nt get it to work, there were no instructions in the ebay listing or for the board number when I googled it.
Great job on the PCB's, loved the video. I'm such a LiPO battery nerd. Can't get enough of this content! Keep up the great work.
Lovely work. Board ordered! 👍😀
Bro this is the testing I need to get my brain to learn
For using machine screws in 3D printed cases, I like to use those brass inserts that you can get, just make the hole a bit bigger and you melt the insert into the hole with a soldering iron, then you have a nice fitting and demountable fixing.
I just noticed that there is NO current sense shunt on the BMS, so is the 60A an operation limit before melting and only voltage controls it, or am I missing something?
How can I use this type of BMS to charge battery pack with solar panel and charge controller?
What are the mosfets switching in the 43 Ohm Rs? If they can handle higher current, maybe replace the 43's with 22s or lower (higher wattage of course) and see if that works ? :) maybe even replace the mosfets with something like AO3400 or AO3401 or better? :)
How did you figure out the max charge voltage?
Interesting! ...thank you for doing all that testing, I was wondering if those boards actually work :) The 43 Ohm resistors are 1/2 watt? I guess so but surprised, ...did it get hot?
Awesome video, loved the level of detailed explanation of the design. Have you heard of "Battery hook up", it looks like a seller of used battery packs for us tinker's to salvage. Is a revision 2.0 possible for this board with, indicator LEDs , easy connector to add parallel batteries, potentiometer to adjust charging current... I figure I should stop before I feature creep too much.
not sure but i got like 4 of them and so far they have been working ok but not sure if its even doing anything or not but im using them lol
I have the same problem with this bms I try 3 psc all do the same thing voltage drop .
I have been planning on buying one of these. Thanks for the video. I have a question though. Can I activate cell balancing if I charge at very low current? Or would that be too low PSU voltage to do anything?
Is it the board not working, or are the cell voltages going down below 2.8V at higher current, which would be correct of course?
Does it charges back balanced after the discharge? Your board?
I may be wrong here but as far as I knowi SMD resistor coding works like this: first 2 digits are the value and the last digit shows how many zeroes will be added to it. So, 430 means 43 + "zero" zeroes = 43 ohms, 431 means 43 + one zero = 430 ohms and so on...
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