Re: 42 Volt Electrical Systems -Reply

[SMILLER@xxxxxxxxxxxxxx]

Jim, thanks for the insight.  I suspect the 42v car systems won't be using
lead-acid batteries, maybe they'll all be switching to
nickel-metal-cadmium-alkaline-unobtanium-gel cells or something.  That
way we won't have to check 19 cells!  Or maybe we'll just check even
ones on even weeks, odd ones on odd weeks?  Oh, I know, they'll give
us a Low Cell sensor on each of the 19 cells, and the check control
panel will be 2 feet wide!  That's it!  And they'll be as reliable as the
coolant level sensors that we all know and love...

Scott Miller
GGC BMW CCA #44977
1990 325i/is hybrid w/ just a 12v system

>>> j.cash@domain.elided (Jim Cash) 10/01/98 06:55pm >>>
<excerpted for your reading convenience>
>Regarding the batteries - flashlight batteries run at about 1.5v per
>cell, but lead acids usually have a cell voltage of about 2.17, and
>float under power at about 2.2.  That way you get a little of 13 volts
>our of 6 cells.
>
>Which does raise an ugly issue  - a 42 volt system will be great for
>operations - but that does mean checking the acid level, and SG, in 19
>cells. (have you checked your 6 cells lately?)
>
>Cheers
>
>Jim Cash
>London, Ontario, Canada

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