Tim
I was hoping you'd get in on this conversation. I've worked with
different types of cells a lot, but only as a practical matter. I have
little knowledge of the chemistry
involved or their internal construction...
--
Jim
HI100@xxxxxxx wrote:
<snip>
> A subtle point: often the high capacity cells are a little less long lived
> than the lower capacity (and higher temperature cells). This is because the
> plate seperators are made very thin in the high capacity cells to maximise
> material on the plates. One of the main ways the cells fail is shorting
> through the seperator. So thick seprator = more reliable all else being
> equal. In reality some other things come into play like how spongy they can
> make the plate surface to increase area etc. The high temperature cells are
> made with a thick (often polypropylene film) seperator and since the cells
> heat at the end of charge they do better with fast charging too. Fast charge
> cells also may have a slightly different relative size of plates to improve
> recombination efficiency of the gas back to electrolyte in overcharge.
>
> Regards,
> Tim Hughes
> >>Hi100@xxxxxxx<<
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