Proposal for a balance charging scheme using inductive transfer from one cell to the adjacent one.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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Looks like a synchronous buck converter to me..
You have destroyed what is patentable. Now it free for all. Like android. Opensource. China.
great idea, but linear appear to have had it earlier :P.
Take a look at the LT8584 i think this does exactly what you try to do with this.
Morning Julian. When will you be making a follow up to this?????????!
Just tell me how much percent of efficiency would that be in difference ? I really don't think it would be much
Not a "Julian's Idea" at all. TI and a bunch of other companies have several chips that do this for you already, TI calls it "Power Pump" balancing.
Come on, Just use one of the IC "bq2058".
Julian, you say that your UltraFire Li-Ion cells are low capacity. The ones I purchased in 2011 (BRC types like yours and from different Chinese eBay vendors) were all repackaged used laptop cells. They even went to the trouble of adding a protection circuit to them. There are a number of videos on YouTube warning about this. Mostly these cells are near their end of life and thus might give you some unpredictable results. I've had better luck buying Panasonic, Sony & Samsung. Keep up the good work.
I found this interesting because I've seen a few people talking and using back emf to charge lead acid Batteries, some even claim to have reached over unity. Back in the 80's and 90's era I would have dismissed this outright, but then recently I came across people talking that since the invention of Neodimium magnets being much more powerful and other claims of over coming Lenz's law it has put doubts in my mind, so as open minded I am I am going to test these theories out in a motor project, and reason I mention this is Back EMF is always something that interests me, as in old school engineers were always taught to short it with a diode, it was regarded as useless and unwanted. So what a breath of fresh air it is Julian to here people like yourself recognizing the useful potential we have here that was wasted long before now. 🙂
I think that would make it too complex. The charge transfer from one cell to another would work though.
For switch mode system you might perhaps charge the inductor from all cells in parallel and have multiple isolated output windings which would essentially charge the one with the lowest voltage only. Compared to a few resistors this is rather complicated as well.
If you have only one cell that is significantly lower than the others you may also find it easy to charge only that call through balancing lead. (Connect the the wires of one cell only and top it up with a charger)
isn't that the basis of a voltage doubler/joule ringer, how would you control the voltage spike thru the inductor?
Definitely want to see your progress, also doesn't it take a few dozen charge/discharge cycles to condition/match the cells in the battery?