Hey I just did a video on these and they are not true active cell balancers. Put an amp meter on the lowest voltage cell, and no current will go into the cell, no matter the SOC or difference in cell voltage. These are mislabeled and should be called "automatic passive cell balancers". My viewers caught it and I had to make a correction on my video as well. True active cell balancers cost a lot more.
also, you will never get 1.2 amps of balancing current unless the cells are at highest state of charge. for most other parts of SOC curve it will be much much lower. I was pretty bummed when I learned this.
Hi mate.. Yes i also suspected that something is wrong with these circuits in their mode of operation, so I am looking for little free time to make one video to confirm it with ammeters and voltmeters separately on each battery. Buy the way nice channel.
I've tested this balancer while the battery was monitored and the higher voltages drop while low voltages rises. I didn't measured current, but it actually transfers energy between series. Now I'm only looking for the GS91 datasheet to better understand how to better tune this circuit.
One Ebay seller of this board says that if the battery pack is attached first the socket should be plugged into the board at an slight angle so that the -ve (black) wire contacts the pins first otherwise damage may result , so if you have the black wire not connected for any reason you may fry the board
In your active equalizer balancer animation the 4th would essentially overcharge past 4.2 since I reached that first. NOTHING is preventing those batteries from overcharging if the pack is heavily out of balance.
Yes, my first time using the board, it let one cell go to 4.27v and the others were 4.17v or so. Cell checker showed 0.096v difference, thus no balancing. Ironically, if my cells had started out mismatched, this wouldn't be a problem.
@@tedhancock68 Some of these balance boards ( this one ? ) needs to see a > 0.1 Volt difference between two adjacent cells, before it will even begin balance those two cells. That appears to be a big problem, to me ...
Parabéns pelo vídeo. Eu estou usando uma placa dessa de 20S, com uma bateria de 72v. Porém está esquentando muito, as luzes estão apagadas e mesmo assim está esquentando. Sabe o motivo?
Yes.... but this single boards have to small balance current, 0.03Amps and also have to much power loses, that's why for fast balancing batteries at 1.5Amps and efficient balance we need active balancer boards in parallel.
3:21 not realy true, it transfer energy to nearby cells, cant directly transfer fron 1st to last in pack more 3s, first charges 2st, then from it 3st, and so on
Sir I am by active balancer saller send me balancer marking LTO(2.2V) I am confused plz tell me I am using 18650 lithium cal battery pack this balancer 8S work or not 18650 cals
I am looking for that LCD battery monitor you have there. What is name and where to get? Need one that shows all 8s cells without user intervention. Just want to show SOC on all cells. Use ping separate active balancer as well. Thanks
I am about to build me a huge 13S battery bank, and i am not sure a balance board like this can deal with such a large bank ? or can it ? Or is there others out there that are designed for high AH banks ? mine will be approx. 665AH@48V Any suggestions ? Thanks.
The best way to think about this is one circuit per pair of cells. Think of each of these boards as a collection of 2s balancing circuits. These circuits can max out at 1.5A. So, yes, very large cells will take a while but will many times faster than a BMS or balance charger.
i now have 4 of these boards based on wills first video .. i missed the second one !!!! .sooooo we now know what they WONT DO .. can u guys tell us what they WILL do if anything .. or shall i just chuck them in the junk bin .. help !!
Yea will got me ripped off too. According to the manufacturer the balancing starts at .1v out of balance and stops at .030v. If I I have yet to set up a test though as my boards just came in. Also the balance lead header is of a smaller pin pitch I think it's a .2mm. So if your battery already has a standard lead attached it will not work. Luckily I have the connector parts already to make an adaptor. I just went and looked looks like he deleted the second vid now.
It really works on every voltage, but you nedd very solid connections to support the 1.2A, otherwise it will stop balancing to early due voltage drop thru wires.
@@ViniciusVetor This must be why my results are better than Will's. Due to some OCD, the board placement and wire lengths are optimized down to the mm. It's probably worth putting on a standard balance header and use your own thick wires.
A few percent is awesome! Please make me one I can plug into my Xiaomi M365! I’m building a 2wd M365 on my channel... Also will you please do a test cycling it with one almost dead but barely functional cell amongst 16 all good ones utilizing an infrared temperature gauge? Thanks!!! Cameron Arcadia CA
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