Another reason is that you can reduce the capacity of your dc-dc
converter. Running lights, A/C, windshield wipers, fans, brake pump,
power steering, etc. all at once is a large current draw. But a single
high current 12V battery can handle that and keep those devices powered
for a long while. The dc-dc converter can recharge the 12V at a much
slower rate, reducing size, weight, and cost. Of course, the 12V
battery well makes up for two of those.
Peri
------ Original Message ------
From: "John Lussmyer via EV" <[email protected]>
To: "Lee Hart" <[email protected]>; "Electric Vehicle Discussion
List" <[email protected]>
Sent: 06-Jun-16 8:57:11 AM
Subject: Re: [EVDL] 12v tales
On Mon Jun 06 08:44:58 PDT 2016 [email protected] said:
I've wondered about this as well. Why keep the legacy 12v battery in
an
EV? Design all the lights, motors, and electronics to run on pack
voltage, and eliminate the 12v battery, its charging circuits, and
problems.
Putting 300VDC at the fingertips of the driver and passengers? Doesn't
sound like a good idea.
Main pack dies - you can't turn on the emergency flashers.
300VDC switches are MUCH more expensive and complex.
Accessories need to work over a large variation of voltage. (280-330 in
my truck).
--
Bobcats and Cougars, oh my! http://john.casadelgato.com/Pets
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