DiVER: mobile solar panel

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shure
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DiVER: mobile solar panel

Beitrag von shure » Mi 1. Aug 2012, 21:06

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Prototype milled out of 4mm plywood, the top may be out of glas or just coated for light use. However, the plywood is already warping a little bit, so I guess a glas panel on top is a must :( Any recommendations for gluing glas onto wood?

Thanks to Oliver for handing out some raw solar panel wafers! :-)
“With great power come great heat sinks.”

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case
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Re: DiVER: mobile solar panel

Beitrag von case » Mi 1. Aug 2012, 22:30

Heyy! That looks great. And Nikolay will be ultimatively happy when seeing this living proof, that the new Logo ist mortiseable :lol:

Glas would give additionaly a better shelter. The warping can maybe avoided when using MDF-Plate instead of plywood. But the plywood looks more stylish, what you have there is in my opinion Mahagony. I would use some linnen oil to give it a nice finish.

Good work!

regards, Oliver
--- Man wächst nur, indem man etwas zuende bringt und etwas anderes beginnt ---

Mein Blog: http://makeable.de
OpenEcoLab-Charta: http://openecolab.de

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shure
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Re: DiVER: mobile solar panel

Beitrag von shure » Do 2. Aug 2012, 00:46

It's plain birch plywood, the color is indeed mahagony (kurz gebeizt und geölt mit dem Lappen wo eh noch Beize dran war..)
I won't oil the surface for now because I don't know if the glue will stick to the oiled surface just as good.
Now searching for glas.. let's see if I can cut some decent glass panels and glue them on top. Does the household silicon (without acid) work here?
“With great power come great heat sinks.”

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shure
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Re: DiVER: mobile solar panel

Beitrag von shure » Do 2. Aug 2012, 01:30

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One prototype finished. The clearance for the wafers is fine, I'll try to solder the panel tomorrow and then mill another set. It's super easy to position everything with the CNC milled baseplate. I'll try to bring the wafers closer together and leave out the connector-maze inbetween :D

I will also try to solder some wires onto the nickel plated neodym magnets, that way I might use the magnets as electrical contacts, not only as a mechanical connector. If the magnets can't be soldered, I might solder a piece of steel to a copper wire and just tack it onto the magnet. The magnets are only 3mm in diameter and 3mm long (cylindrical) - the connection may be unreliable and the resistance too high for the 8 A_peak..
Zuletzt geändert von shure am Fr 3. Aug 2012, 17:15, insgesamt 1-mal geändert.
Grund: grammar corrected
“With great power come great heat sinks.”

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case
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Re: DiVER: mobile solar panel

Beitrag von case » Do 2. Aug 2012, 03:22

shure hat geschrieben:It's plain birch plywood, the color is indeed mahagony (kurz gebeizt und geölt mit dem Lappen wo eh noch Beize dran war..)
I won't oil the surface for now because I don't know if the glue will stick to the oiled surface just as good.
I looks like the so called sipo-mahagony. Its a cheap kind of mahagony and often used at the top layer (or back layer) or for each second layer. Other layers may be from birch, so that the whole thing is called birch plywood.

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( from http://www.holzlexikon.modellskipper.de ... hagoni.htm )

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(from http://www.nauticexpo.com/prod/world-wo ... 04505.html

Birch looks like this:
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(from http://www.holzlexikon.modellskipper.de ... /Birke.htm)
Now searching for glas.. let's see if I can cut some decent glass panels and glue them on top. Does the household silicon (without acid) work here?
hmm, good question. Im not shure about how long it will last, whetherall it may glue in the beginning. And intuitvely i would assume that it would glue better if there is a finish on to it, of course the finish must be completely dry before glueing it. Linnen-Oil-firnis will become dry within one or two days.

At least the silicon will give a certain seal, maybe you can fix the glasplate additionally with strong tape wrapped round the edges twice.

Gruss, Oliver
--- Man wächst nur, indem man etwas zuende bringt und etwas anderes beginnt ---

Mein Blog: http://makeable.de
OpenEcoLab-Charta: http://openecolab.de

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shure
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Re: DiVER: mobile solar panel

Beitrag von shure » Fr 3. Aug 2012, 12:10

Right, it really looks more exotic than birch. I didn't know that there are that cheap versions of mahogany!

I am now doing some CAD/CAM work to mill picture frames. Those cheap ones with a frameless glas layer on top, held in with 6 clips which hook into the cardboard (?) backside. Those clips are pretty neat, I'll use them for securing the glas ontop great for temporary use without any glue.
“With great power come great heat sinks.”

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shure
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Re: DiVER: mobile solar panel

Beitrag von shure » Fr 3. Aug 2012, 19:41

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Backside with metal clips to hold the front glas. A tiny magnet connects the panels to a modular grid, the metal clips double act as connectors:
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“With great power come great heat sinks.”

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case
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Re: DiVER: mobile solar panel

Beitrag von case » Sa 4. Aug 2012, 02:53

Thats a good idea with the clips!

Since they are reversible this offers lot of flexibility, especially in the beginning/testing phase.
This construction may also let the heat better escape than a complete encapsuled one.

I am courious how the magnetic connection will work, but the double use of the clips as contacts makes sense.

regards, Oliver
--- Man wächst nur, indem man etwas zuende bringt und etwas anderes beginnt ---

Mein Blog: http://makeable.de
OpenEcoLab-Charta: http://openecolab.de

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shure
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Re: DiVER: mobile solar panel

Beitrag von shure » Mo 6. Aug 2012, 16:27

case hat geschrieben: I am courious how the magnetic connection will work, but the double use of the clips as contacts makes sense.
Just a tiny magnet sandwiched between the clips. Can be superglued (with a dot of CA = cyan-acrylate) to one clip so it will come off only on the e.g. positive side of the panel when you disconnect two modules. A 3mmx3mm magnet is sufficient for testing, for a long panel I'd use larger rectangular magnets instead.

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The maze for the cable relief turned out really useful and totally does it's job.
The only thing left to do now is to get 20cm x 36cm glas panels for the top. I tried to cut some glas myself out of a 30x45cm panel, but that didn't work out well.

Bild
“With great power come great heat sinks.”

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case
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Re: DiVER: mobile solar panel

Beitrag von case » Di 7. Aug 2012, 00:02

Very cool !!!

Looks, as if the thick wires in the maze help to keep the cells down with being formschlüssig (shape-fitting ?).

And nice, that the magnet stuff works also. But if you glue it would it be still conducting ?

The thing contains also an intelligence-test-question: if you have clamped the glass on it, you could not weld the clamps. But if you would weld them before then you are not able to move them for clamping the glass under them ;)

Its a pity that the glass is to short, i assume its from the picture frame. However, one can get the idea already how it will look like later. Nice done !

regards, Oliver
--- Man wächst nur, indem man etwas zuende bringt und etwas anderes beginnt ---

Mein Blog: http://makeable.de
OpenEcoLab-Charta: http://openecolab.de

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