I've been scanning through the archives, and also the Service Manual, and
am seeing some mixed messages on this - what voltage should the charger be
putting out to the batteries? Mine's putting out a shade under 40 V
(39.5V or so), and they seem to not be holding as much energy as I'd like
(T-105s that are a few years old, bought used). According to the Service
manual, 40-45 V is ok (well, not on exactly the same wires as I'm
measuring the voltage, I'm measuring across the battery pack, rather than
at S3 and S1 directly on the charger, so there's presumably a small amount
of voltage lost between the points the manual says and the points I'm
measuring at, especially if some weak connections, such as at the Diode
heat sink). According to the archives online, I've seen people saying that
if the voltage isn't 42-45V, the charger won't fully charge the batteries
enough (some people who replaced the capacitor when the charger was only
putting out 39V or so, for example).
With mine charging, the charge meter goes slightly into the white
section - whereas in the archives, I've seen statements that if the meter
doesn't go all the way to the high end of the white section, the batteries
won't get a full charge.
On the other hand, the Landis controller only has the charger on
when the pack voltage falls below 38V, by default, unless you adjust it
up. So, if charging to 38V will give you a full pack, then there's no need
to have the charger putting out more than 39V or so (other than that the
higher the voltage it puts out, the quicker the pack will charge).
So, which is it? Is 39-40V from the charger ok, or should it be
42-45?
Essentially it comes down to - what should be the voltage of a
fully charged battery pack (I know it's higher than 36V, but how much?)?
Thanks,
Mike
--
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Michael S. Briggs
UNH Physics Department
(603) 862-2828
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