[EMAIL PROTECTED] wrote:
In a message dated 9/2/2005 10:45:19 PM Pacific Standard Time,
[EMAIL PROTECTED] writes:
Other batteries have other reactions when overcharged, but all have some
sort of negative reaction. Overcharging a Lithium Ion battery is
dangerously catestrophic. Because of this fact, lithium ion batteries
have charge regulators for each cell, to prevent a serious explosion.
This is a rather simplified explanation.
=========
Huh. Sort of get it. But how can a battery accept more charge than it can
hold?
Like say, a glass of milk. Pour too much milk it goes outside the glass. Bad
effect, but the glass can't get any fuller. Or maybe that's it. Is that it?
Think of it more this way...
If you heat water toward boiling point, you will get hot water, but if
you heat it hotter than boiling point, you will get gas (steam). Water
can only accept so much heat before it vaporizes.
A battery can only accept so much energy before its physical properties
also begin to change for the worse. A lead acid battery will boil off
its electrolite. A NiCad will overheat, expand, explode. A LiIon will
suddenly ignite. The chemistry is affected by charge state. Push it
past a certain point, and its composition changes in an undesirable way.
