Hi all,Having just glanced at this thread, I thought I should share a morsel of knowledge I gleaned from a wise older guy I met in Palo Alto at an EV show a few years ago.
I had a very enlightening conversation about battery temperature monitoring, with a long time member of the EAASV (Silicon Valley chapter), Warren Winnowich (sorry about the spelling Warren). Warren's lifetime experience with the likes of NASA has provided him with a vast body of experience, knowledge and wisdom about such things as how, where and when to measure what. He told me the best place to measure the temperature of a battery module is on one of it's sides, not the top or bottom as many people mistakenly believe.
So it would seem that, whenever possible, temp sensors should be installed to read off a side that is least exposed to cooling, if preventing thermal damage and maximizing pack output are the goals.
That makes sense to me, and although nobody asked for my 2 cents on the matter, there ya go. Haha. I enjoy reading about what you are all doing and the spirit of collaboration here.Keep on pluggin',Gerry Gaydos
"Internal combustion is so last century"... Funkymoto�, Electrifying Cars! 250 598 3100
Date: Sun, 9 Dec 2012 15:07:53 -0500
Subject: [solectria_ev] Battery temp sensors
Hi gang, here's a note about a recent temp sensor fault. The important
point is that in the NLG software (to program the NLG4 charger), there is an
option to look at the front battery compartment temp sensor, back one, both,
or neither. However, this option is not located in any logical place but is
on the page labelled "Serial number, type, and date."
My charger was shutting down partway through the cycle, and I found with
the MONLOG program that it was registering a temp sensor fault in "Batt1"
which is the front compartment. The temp sensor is attached to the post of a
battery somewhere in the middle of the series. Since the front compartment
is a bear to get to (and anyway the problem might be a loose wire somewhere
en route), I decided to just ignore that sensor, which I figure would only
come into play if I were charging on a hot day in the sun. Long story short,
I found the setting in the NLG program, set it for rear sensor only, and the
charger now does its job perfectly again. Now the car's running
perfectly -- even fixed the flaky dome light (loose wire up next to glove
compartment). Someday maybe I'll find the temp sensor problem and go for
it -- but not in winter.
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