Working Air Battery

[Mk1]

@all

I have uploaded a study made on aluminum battery simple construction and clear detail .

to get access to the download

http://www.overunity.com/index.php?action=downloads;sa=view;down=396

Enjoy !

[guruji]

Mk1 interesting research regards. Today I made a small battery with copper wire around an aluminium in bleach and water gave about 0.3v and 5ma and a copper rod in an aluminium pipe that gave 0.6v at 2ma. Interesting when using copper wire gives more amperage.

[stephenafreter]

@Mk1
Thanks a lot for your document 
That gives me a lot of useful data !

So adding a bit of NaOH with the salt is very useful for power output. That's good.

1- Did you add graphite powder to the pencils ? If yes, can you explain how ? What "glue" did you use ? 220mA at almost 2V is enormous compared to my 10mA at 0.6V without NaOH 

2- Can you give a shortcut in quantity to prepare the electrolyte, like giving measure in spoon/liter instead of Moles please ?
Congratulations, and thanks for sharing, an essential document !

[conradelektro]

Replication of Pete's (PeteIdl4) aluminium - copper wire cell:

See Pete's tutorial videos (and my photos below):
Part 1 http://www.youtube.com/watch?v=B9YqFY-Z0dk (video by PeteIdl4)
Part 2 http://www.youtube.com/watch?v=ZeQof7ue9xA (video by PeteIdl4)

- Kitchen paper towel sheets were soaked in saturated salt water and then dried in the sun. They were a bit stiff after that but that helped when rapping the paper over the inner aluminium sheet and over the copper wire windings.

- When winding the wire over the (paper covered) inner aluminum sheet I took care that the windings did not touch.

- The outer aluminium sheet and the inner aluminium sheet are held together by a little screw which also holds the cable to the aluminum.

- Air can enter the cells from three sides.

- Four cells are connected in series to get about 2 Volt (without load)

- After the cells were finished they showed about 0.5 Volt, but almost no current. So I added a little water with a pipette. Just enough to make the paper damp. After that I am getting great results (almost for three hours till now):


0.5 Volt without load

0.4 Volt with 1 mA load

0.2 Volt with 4 mA load

short circuit current is about 6 mA


I will report in the coming days how the four cells are holding out. They are driving a Joule Thief which draws about 1 mA (while the four cells in series hold 1.6 Volt steady).


@ Mk1 - Thank you for the aluminum cell PDF-document!


Greetings, Conrad

[conradelektro]

Update on the replication of Pete's (PeteIdl4) aluminium - copper wire cell:

Four cells in series are driving a Joule Thief for the third day. With a load of about 1 mA the four cells in series are easily holding 1,6 Volt (0.4 Volt each cell).

With a 10 mA load the four cells are holding 0.6 Volt (0.15 Volt each).

I had to add water on the second day (with a pipette) and constructed a "press mechanism" to hold the aluminium sheets and the copper wire windings closer together (see attached photo). This increased the output (short circuit current now up to 18 mA).

Greetings, Conrad