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Author Topic: Working Air Battery  (Read 221270 times)

PeteIdl4

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Re: Working Air Battery
« Reply #75 on: June 21, 2010, 01:25:15 AM »
@Jeanna,

Yes, there's two Mag outputs the plate is one an the mag ribbon is the other. The copper wire is wound between the two about 15-20 turns wide spaced. The ribbon is about 11 turns. I have Illustrated this picture hope it helps. Let me know if you have anymore questions.

jeanna

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Re: Working Air Battery
« Reply #76 on: June 21, 2010, 01:37:05 AM »
Very interesting.
Yes, that does help.

I assume there is a difference in either volts or amps if you only use the  mg ribbon?
How much is it for both with
 just the mg ribbon to the copper and
just the block to the copper?

Thank you,

jeanna

PeteIdl4

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Re: Working Air Battery
« Reply #77 on: June 21, 2010, 02:00:59 AM »

I assume there is a difference in either volts or amps if you only use the  mg A?
How much is it for both with
 just the mg ribbon to the copper and
just the block to the copper?

The mag ribbon and copper alone give 1.3v@62mA

The plate and copper are 1.3v@65mA

All together it's holding steady 1.3v@103mA

-Pete

jeanna

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Re: Working Air Battery
« Reply #78 on: June 21, 2010, 03:33:35 AM »
Thanks Pete,

I am surprised about the block.
Mine only puts out about 2 or 3mA


I think you must have magnesium ingot.
I saw that for sale and I now wish I had bought the ingot. It will probably outlast any ribbon just because of its shape and mass.

thanks for the test results,

jeanna

Mk1

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Re: Working Air Battery
« Reply #79 on: June 21, 2010, 04:46:39 AM »
@all

http://en.wikipedia.org/wiki/Aluminium_battery

Energy/weight
watt hour /Kg   Practical 1300 per Kg (theoretical 6000-8000)

 we couldn't we build a composite battery 2 cell in one . High amp copper/scrap aluminum , then low amp just to raise the voltage up a bit copper /carbon that way we don't need big carbon rod , only the small recycled ones from carbon zinc battery .

So the cell look like this big chunk of copper the right size so the can will cover both sides of the copper plate , and aluminum/copper/carbon  (/ = electrolyte ). Lets not be wasteful try to use as much of the can as possible.

Mark

Pirate88179

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Re: Working Air Battery
« Reply #80 on: June 21, 2010, 08:23:47 AM »
Jeanna:

My infamous carbon rod (1" dia. X 18" long) was purchased from a company called Airgas and it cost me less than $20.00.

Still a lot of money I know but it is still going strong after these 2+ years outside in the ground.  If you need contact info, let me know and I will try to dig it up from back then.

Bill

maw2432

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Re: Working Air Battery
« Reply #81 on: June 21, 2010, 04:58:47 PM »
@Pirate   
Bill thanks for the Harbor Freight low cost on the fire starters.... they had them on sale for $1.99 each.   

I found these graphite bars 3/4 in. by 3/4 in. by 8 in.   5 for $10.00 on Ebay... they have 10 lots left at this time.   
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140400637264

I am looking at making a multi-cell type battery as an experiment when I return from vacation..

It will be several weeks until I get back....

I look forward to seeing everyones progress in the mean time.

Bill

jeanna

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Re: Working Air Battery
« Reply #82 on: June 22, 2010, 05:41:35 AM »
I have seen some good success with the air battery today.

Yesterday, I soaked every one of my air batteries in epsom salts, and they were still rather wet last evening, when I was not sure I had anything remarkable.

Well, today as the batteries got less soaked, they seemed very strong, so I took the 1 red led from the secondary and replaced it with 3 white in parallel, and the light is great.
I think the one with tape covering all the magnesium seems brighter even though it has a thinner pipe and much less magnesium.
I suspect the bigger one is drier because there is not tape covering all of it.?? maybe??


So, some good encouraging results.
Here are 2 pics:

1/2 inch and brighter
1 inch and bright.

jeanna

DrZoidberg

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Re: Working Air Battery
« Reply #83 on: June 22, 2010, 07:31:16 PM »
@Pirate   
Bill thanks for the   on the fire starters.... they had them on sale for $1.99 each.

Hopefully they really are made from magnesium.
I bought a fire starter for 3€ and even though it said magnesium on the package it was actually made from aluminum.

Pirate88179

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Re: Working Air Battery
« Reply #84 on: June 22, 2010, 07:34:30 PM »
[  author=maw2432 link=topic=9276.msg246138#msg246138 date=1277132327]
@Pirate   
Bill thanks for the   on the fire starters.... they had them on sale for $1.99 each.
[/]

Hopefully they really are made from magnesium.
I bought a fire starter for 3€ and even though it said magnesium on the package it was actually made from aluminum.

The ones I purchased there were magnesium and work well.

Bill

DrZoidberg

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Re: Working Air Battery
« Reply #85 on: June 22, 2010, 08:54:22 PM »
Did anyone try magnesium chloride? It's very hygroscopic so it might increase the moisture content of "dry" paper.

lasersaber

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Re: Working Air Battery
« Reply #86 on: June 23, 2010, 03:02:57 PM »
Day Ten!

Great work everybody!  I am really surprised at the success some of you are having with copper.  I never could get the copper core batteries to work very well long term.

Here is a video of my current long term air batter test: http://www.youtube.com/watch?v=nCdj9TJCZd4

Here are some pictures showing better details:

Lakes

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Re: Working Air Battery
« Reply #87 on: June 23, 2010, 08:25:41 PM »
Nice construction layout on the motor, maybe add some build details (number of turns/wire size) etc for others that want to build one.

jeanna

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Re: Working Air Battery
« Reply #88 on: June 23, 2010, 10:48:08 PM »
Thanks Lasersaber.
Your video is great, and these close ups are really excellent.

I made the suggestion on the video that when it finally stops you could scrape the crud from between rows of ribbon to see if it helps.
I think the bubble shape of the crud is because you are making H2 inside the mg. That H2 is lifting the wet mg up until it collapses as crud. My guess.

@all,
I also want to say the big one I made has only a thin spiral of tape holding it down and therefore it can get dry, which it has done.
The 1/2 inch one is still going strong moisture-wise. I completely covered that one with tape and I thought it didn't work, but I needed to thoroughly soak it to get it really going. It is still wet enough to work after 3 days from the soaking.

I also have had a carbon mg one that is only 2 1/2 inches that is continuously running a jtc, so ...

These really work.
Thank you for sharing this 'invention'.


jeanna

hmmm I guess I am glad I had to get a few of those reed switches to satisfy the mim order!
Next job is to invent a new reed switch?  ???

knovos

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Re: Working Air Battery
« Reply #89 on: June 23, 2010, 11:08:20 PM »
I have been playing for a week with this stuff and what I see there is a oxidation going on by the water with some kitchen salt on the magnesium ribbon (see pictures down under)

When I wanted to peel off the ribbon it broke between my fingers. I used a lot of water so I think the less water the longer the coil will last. I've got 0.53 volt 22 mA on one of these sticks. I used one thin layer of elastic bandage. I pulled the graphite rods out of an old battery.
I saw a guy doing that in this video http://www.youtube.com/user/NurdRage#p/search/2/knc1lSupAwQ
I heated the rod with a little flame several times to get out the tar that is in the rod. Just heating and cleaning the tar with a tissue. A cheap way to get these rods, the structure is soft. Thanks Lasersaber, you got me going with this stuff ;D
Kind regards,
Leon.
« Last Edit: June 23, 2010, 11:48:10 PM by knovos »