Today's Message Index:
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1. 12:14 PM - Dual battery isolation (Lew Gallagher)
2. 12:47 PM - Re: Dual battery isolation (Tim Olson)
3. 04:21 PM - RV10 HQ in Camp Scholler - Sunday (7/19) - 6:00PM (Bob Leffler)
4. 07:18 PM - Re: Dual battery isolation ()
Message 1
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| Subject: | Dual battery isolation |
Hey Tim O., et al
A little off topic, but related.
I am restoring a bass boat for my step-son. It will have a main battery for starting,
and an auxiliary battery for trolling motor, lights, fish finder etc.
I remember your design for your main and backup batteries having two diodes wired
in so that they can be charged from the same source, but not bleed back into
the other system. I've checked and they DO sell "battery isolators" and "automatic
charging relay with start isolation" specifically for my marine needs,
but they're a little pricey. They are affordable, but you know I love a challenge
and the opportunity to learn something new.
Can I make my own? If so, what are sources and part numbers for the diodes and
a diagram?
Thanks, - Lew
--------
non-pilot
crazy about building
NOW OFICIALLY BUILDER #40549
Fly off completed !
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=444698#444698
Message 2
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| Subject: | Re: Dual battery isolation |
I just re-worked this a little for my RV-14 and changed things
ever so slightly, but the Schottky I used for the system this
time is the DSS2x121-0045B by IXYS. It handles a lot of
current.
The design basically uses one schottky just to feed from the main
to the aux bus (that feeds the e-bus), just to charge the battery.
(only when the aux master switch is on) The 2nd schottky was used
primarily because: I turned on the e-bus during engine cranking
to prevent brownout, but then turned it off after it was running.
Without a diode feed, during the switch throw, the power would
be out on the e-bus. I did some shuffling a little on the new
system to change how it all operates just a tiny bit. But
one of my initial goals was to NOT have the diode drop (even
the small drop of a schottky) between the main bus that is doing
the charging and the aux batteries, in normal operation. I wanted
that aux battery to get a full voltage charge.
Anyway, above is the part number of the diode I used.
For the diagram, I don't know that what I did will at all
be relevant to what you're trying to do, but it should be
pretty simple to do what you want. You probably could even
just connect the 2 batteries with just the schottky and
be ok. Or, if you want full line voltage, you could
just have a 3 way ON-OFF-ON switch so that one path uses
the diode, one uses a plain wire, and center is off.
It should be pretty easy.
Tim
On 7/13/2015 2:10 PM, Lew Gallagher wrote:
>
> Hey Tim O., et al
>
> A little off topic, but related.
>
> I am restoring a bass boat for my step-son. It will have a main battery for
starting, and an auxiliary battery for trolling motor, lights, fish finder etc.
>
> I remember your design for your main and backup batteries having two diodes wired
in so that they can be charged from the same source, but not bleed back into
the other system. I've checked and they DO sell "battery isolators" and "automatic
charging relay with start isolation" specifically for my marine needs,
but they're a little pricey. They are affordable, but you know I love a challenge
and the opportunity to learn something new.
>
> Can I make my own? If so, what are sources and part numbers for the diodes and
a diagram?
>
> Thanks, - Lew
>
> --------
> non-pilot
> crazy about building
> NOW OFICIALLY BUILDER #40549
> Fly off completed !
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=444698#444698
>
>
Message 3
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| Subject: | RV10 HQ in Camp Scholler - Sunday (7/19) - 6:00PM |
RV10 HQ Dinner in Camp Scholler - Sunday (7/19) - 6:00PM
The location is on the west side of 53rd street just south of Lindbergh
(also called Oak Lane).
We are asking that everyone attending please R.S.V.P. at
http://www.perfectpotluck.com/meals.php?t=DSOH9787 . If you just show up
without giving us your R.S.V.P., we stand the chance of running out of food.
Bob Leffler will arrange procuring the basics like meat, a few side dishes,
soft drinks/water, condiments, plates, utensils, etc.
To cover these costs for the meal, we will ask for a CASH DONATION from
everyone. There will be a bucket on the serving line for the donations. In
addition to cover the food costs, we also request a donation to cover the
cost of the extra camp sites used for the dinner and a place for RV-10
builders to hang out together during the show. If there is a vendor that
wants to assist in underwriting the dinner, we'll gladly make sure that
everyone knows.
If you have unique dietary needs, please feel free to bring your own food.
We'll do our best to assist with getting it cooked. i.e. veggie burgers You
can also drop Bob an email to see if he can pick something special up when
he shops on Sunday. We will try our best to accommodate special needs, but
can't make any guarantees.
How to get there:
If you're unfamiliar with the area, easiest way to get here from the main
AirVenture grounds is through the Theater in the Woods gate (also a tram
stop). Walk west (right) on Shaick Ave, turn south (left) on Binder Lane,
turn west (right again) on Lindbergh and go to 54th. You'll find the cookout
about half way down 54th on the west side of the lane. Elm street (1 south
of Lindbergh) in Camp Scholler has been relocated a north from prior years.
Group site is about 3 sites north of the NEW Elm street location.
https://mapsengine.google.com/map/edit?mid=z2G9kwPv6p8Q.kGsNSWbLT7wo
This is a photo standing on Lindbergh looking south on 53rd as of this
morning.
Message 4
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| Subject: | Re: Dual battery isolation |
Thanks for the lightning response, Tim. I'm on it. I assume I can just put
the charge wire from the motor to both diodes, then from each diode to each
battery?
Later, - Lew
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