Diodes only leak current in reverse in the 100 ua range even at 1KV. But this is not the problem. Some electricity get through during the switching wich there shouldnt be any foir this purpouse, so for efficiency it works fine,
Yes what you say about the
BMS is correct I believe.
The diode works like a one way small capacitor that wont overcharge or better still is rated to not fail. The capacitance is tiny.
The way I show things isnt always the way I understand it. When I did my electronics course I could handle all of it but at the end the teacher told us everything we know is the opposite way around.
I had this post with holes and electrons ready to go.
Anode +
Cathode-
If you look at the lithium ion its easy to see thar it must lose an electron to make the a Li anode, and store it in the aluminium cathode. The insulator stops the leakage, and the electroltye promotes the exchange. So yes the electrons are negative and what we call the +ions are the holes. But the electrons travel from negative to positive. to discharge.
The diode here has capacitance, as at the positive (p) junction, electrons gather blocked by the depletion zone at the barrier and in turn push electrons out in the substrate on the negative side (n) side due to an electric opposing field, So holes don't move like our little electron friends because they are the atoms and they change ionic state depending on the action you perform upon them.
Charge a battery you don't actually fill it up like a petrol tank, all you do is pump electrons from the pos plates to the neg plates. By bombarding the negative plate with electrons you draw from the positvie plate. You can charge the battery off a dynamo, the power allways goes to ground and that is magnetically induced bythe dynamo from the +anode.
The Li-ion battery is more like a capacitor with disimilar metals and uses chemicals to promote charge carriers. Unlike chemical batteries which create a different moecule to charge and turn return to their original state during discharge. This is why Li batteries charge so much faster as they don't need to make moleculse to achive there goal.
Li-ion
Atoms wont move unless the medium they are bonded into is destroyed. When you discharge the only partical that moves are electrons from the negative plate to the positive. Not may people get that so we just telll them the power runs from pos to neg.
What put me back so much in elecrtronics is that when I learned verything one way it turned me upside down, I tried to work it the other way. To this day I mstill get some stuff the wrong way around. Just like my screeny. Learning the correct way electricity works has been a better experience in the long run as It gives me better understanding on many physics subjects and learning them is not so impossible.
Exerpt from wiki
During discharge, lithium ions Li+ carry the current from the negative to the positive electrode, through the non-aqueous electrolyte and separator diaphragm.[7]
During charging, an external electrical power source (the charging circuit) applies a higher voltage (but of the same polarity) than that produced by the battery, forcing the current to pass in the reverse direction. The lithium ions then migrate from the positive to the negative electrode, where they become embedded in the porous electrode material in a process known as intercalation.
During discharge, lithium ions Li+ carry the current from the negative to the positive electrode, through the non-aqueous electrolyte and separator diaphragm..Ah ha!
So the current travels through the sepatator. So then why we need to link the cells up at all with conductors. Yah right. People cant see how the positive moves to the negative and the negative moves to the positive, The cant see the holes are just positive imbalanced atoms that can gain an electron or lose one in the blink of an eye. It will always have polarity to the negative charged cathode through a conductor.
I got no good info for this post from google, its all like the above, a little bit far fetched. Im sure the engineers and pysicians understand this and I cant access the papers.
So if anyone wants to add to this for a better understanding of this science please do.
Im a very tired now as its damned 9:37 AM and I stayed up all night again.
I would love to discuss this more soon but my brain is behaving a little random.
Cheers and good
night morning Duane.
