dnmun said:
why come here and ask if you don't wanna listen to others advice. if you need a free yes man then you should get married. you never explained what the reverse parallel diode trick does.
The important piece of any advice is to understand the why. That is where the value is. I understand why a BMS is important, a good idea, a smart choice. If you can accept that I want to do something that is a bad idea, I would find input into why it might not do what I want it to do very helpful.
I did not answer about the zener diode because I instead decided to give a simpler concept that I think should do the same thing. I did that to avoid getting bogged down in some minor detail I don't get that is related to zener diodes rather than the general concept I am asking about, since there might be a fundamental flaw in my approach making the complexity of using the zener diode voltage regulator type of approach irrelevant.
If someone can educate me as to why it wont work, no need to get into my (most likely flawed) understanding of how it might be better to do it with a zener diode.
1.) Can a simple led with the right turn-on voltage (tuned with resisters) be used to bleed power faster from cells that have a higher soc? Why not?
2.) Can bleeding power from individual LiFePo4 cells faster above 3.4v/cell than below keep a pack that will be charged to 80% soc target in balance enough to significantly decrease the chances of overcharging any individual cell in series charging with no balance taps? The only flaws I can see in this are 1.) too much standby draw and 2.) making sure the standby draw is very well matched so it doesn't create imbalance. Are those surmountable issues? Any others?
Thanks to all who are here trying to help. I can't really pay that back here very often since I'm not very knowledgeable about electronics, but I pay it forward every day in other areas, which is why I am not reserved about asking.
