Fri 21 Jul 2006
At the request of someone I ran a test tonight to see what the resistance of the cell was before and after charges. I also wanted to see if the cell held a charge when I unplugged the current. Here are my measurements.
Before the test began I could not get any resistance readings at all. Had to wait until after cell had been producing hydrogen before it would read.
After 30 minutes of running I unplugged the terminals and took a resistance reading of 14.2M ohms and dropping 0.01M ohms/ second. After about 5 minutes it had dropped to 12.22M ohms and the rate had slowed to 0.01M ohms/6 seconds.
I then plugged the cell back in and let run for 5 minutes.
When running this time measured battery and amperage and got 13.3V and 1.76A which comes to around 7.56ohms. Not really sure why the hot and cold numbers work out so differently but I’m confident some of my friends can explain it and I’ll post an update here later.
Next I unplugged the cell and took new readings. Resistance back up to 14.3M ohms and dropping as before. Measured current and got reading of 1.045V across anode and cathode with no battery plugged in at all. In fact, both terminals were removed so the cell was sitting free.
I have decided to build a see-through container with seperate cell compartments in it in order to aid in my testing. I’ve also sperated my 11 plate cell into 2, 5 plate cells and flatted the plates out with 1 set to see what the difference between the curved and flat plates are. Probably take me most of the weekend to setup for the new tests so I’ll let everyone know when we’re ready for some new videos…
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