On 3/22/2013 6:04 AM, GunnerAsch wrote:
On Fri, 22 Mar 2013 09:23:17 -0000, "Keith W"
wrote:


The conventional Batteries are sometimes called Sealed Lead Acid
Batteries but they are actually AGM batteries.

Modern passenger aircraft normally use Nickel Cadmium batteries

Why havent they converted over to NmH?



The method of charging is more complicated than the other versions.
NiMH batteries work well if you only have one cell (say, 12 volt using 4
3 volt cells). But when you are trying to generate 36 volts to 400
volts, each cell pack must be independently charged. Not possible in
that application.

Actually, it is possible but not practical. As Keith pointed out, NiMH
batteries are used in the Prius so it is done but there are better ways
today. NiMH batteries were passed over very quickly in almost all
applications.

Daryl