This is well worth watching:
Quote:
Originally Posted by Daox
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Further in the video he goes over how LiON cells age and the breakdown voltage of the electrolyte, 4.3V. This means I can use my gang of Zeners and a stepped charge cycle, 5A steps down to 0.5-1A, when the 15 cells approach full charge 3.3V/cell and use the 3.6V Zeners safely. This has substantially simplified my in-bike charger.
One other thing, I'm not going to fold the tabs but use them also as heat-sinks. They provide an excellent transport from the body of the cells to where I'll run outside air to help dump the heat.
Of course, we'll still need to understand the temperature effects on voltage.
Bob Wilson