----- Original Message -----
From: "Calvin Rollins" <crrphr@webtv.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Wednesday, October 04, 2000 1:59 AM
Subject: [MV] charging voltage
> What should the voltage be for the 24volt charging system of a M-135 (1
> bat(12v) =13.9 to 14.5 volts, 2 bat (24 v) = 27.8 to 29 volts)????
> Thanks for your time. Calvin Rollins
>
Correct.
We have to call lead-acid batteries something, and a nominal 2V per cell is
a nice round number we humans like. 6 cells make a "12V" battery and the
one thing it never actually is, is 12V.
The nature of the lead-acid battery is a large voltage swing between
discharged, charged at rest and charging full, typically 10.5V, around 13V
and 14.2V - 14.5V for a "12V" battery.
Note that the actual cell size is only affects the capacity, they are always
a nominal 2V per cell whether it be a tiny battery or a truly huge one of
several tons from a conventional submarine, and these are huge.
Richard
Southampton - England
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