? Dither the pwm around some and find the point of maximum current into th e battery pack?
o the battery, it is not the average current, it is the peak current that i s to be limited.
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conductivity water (tap water) and got up to about 150kHz on warm 2% NaOH.
round in solution, stuff can happen quite rapidly. The actual processes at the electrode happen very quickly, but the double layer next to the electro de surface can get up to 10nm thick, which can slow things down a bit.
The current limit for the battery arsies from the desire to get the right a toms laid down in the right places.
If you try to put in too much current, the structure of the material deposi ted changes, and the battery doesn't work as well.
My conductivity meter used "platinum black" electrodes to get more electrod e area in a confined space.
If you plate out platinum slowly it lays down as a nice shiny flat surface.
If you push in more current, you deplete the platinum ions close the surfac e, faster than they can diffuse in from the bulk of the solution and any li ttle irregularity on the surface that sticks up into the solution gets more platinum, and you end up with a fractal branching structure of long, very skinny platinum stalks which has an large surface area and looks black.
You will have to read up on lithium batteries to find out exactly how they go wrong, but it is the same kind of idea. Current density matters.