Well, I can appreciate that you probably  don't want to go back and change
something that is reasonably well working.  The good news is that you can't
drive one EV because you have another that you drive more!

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Cor van de Water
Sent: 16 November, 2013 7:21 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Relationship between the DD\DC CONVERTER&battery

Peri,
The vacuum pump runs off 12V, not off the pack.
I guess the vacuum pump should be on a relay that either gives a delay or is
controlled by a signal from the IOTA or even from the controller,
which will trigger the power brakes only once the vehicle is driven.
This signal should latch the relay "on" until the key is turned off.
Latching is done by one of the relay contacts providing power to the
coil so that once energized, the relay stays energized.

Cor van de Water
Chief Scientist
Proxim Wireless Corporation http://www.proxim.com
Email: [email protected] Private: http://www.cvandewater.info
Skype: cor_van_de_water Tel: +1 408 383 7626


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Peri Hartman
Sent: Saturday, November 16, 2013 2:23 PM
To: 'Lawrence Rhodes'; 'Electric Vehicle Discussion List'
Subject: Re: [EVDL] Relationship between the DD\DC CONVERTER&battery

Why do you have the vacuum pump running while the car is parked?  Can't the
pump run for several seconds after "starting" the car?  In other words, hook
the pump to the other side of the main contactors.

Peri

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Lawrence Rhodes
Sent: 16 November, 2013 1:59 PM
To: [email protected]
Subject: Re: [EVDL] Relationship between the DD\DC CONVERTER&battery

The problem is the vac pump draws down the aux battery so the contactors
won't close and the car can't start.  It's a matter of voltage.  The pump
will work until the battery is dead.  However this doesn't allow enough
voltage through to close the contactors.  ONce the contactors close the Iota
takes over and all is well.  Wipers lights vac pump.  No porblem.  Drawing
down the battery takes two months.  The battery is an Optima style battery
which is plenty tough.  I've even increased the charge voltage by inserting
the phone plug.  Doesn't help much.  Could be I just don't use the EV enough
as we have a Leaf now.  The solution is to simply charge the aux battery
once a month.  Lawrence Rhodes.....
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