Homebrewed Electricity > Storage
Nu solar power
Bryan1:
Hiya's
This could prove to be a techincal question but here goes. I just installed my old solar panels off the house now they are set up on my shed in a 24 volt array but off talking with a few great friends off this board I'm still stuck. I'm trying to use a 2422 BP 24 volt solar regulator to try to charge a 24 volt bank of military nicad batteries they are a bank of 10 batteries rated at the nicad range which I think is 2.6 volts per cell. But if anyone has previous experience with deep discharge Nicad batteries and with the right solar regulator circuit I will be greatly appreciated.
http://www.electro-tech-online.com/viewtopic.php?t=12657
here is a link to electro-tech that shows my battery's I did fix the one pictured but I've been told Nicad's are and lead acid batteries are a totaly different story.
Cheers Bryan
johnlm:
Not that is solves your problem, but Nicads are nominal rated 1.25V per cell.
You might need to describe in more detail what problem you are having.
regards
John
jimjjnn:
I believe these are NiFe (Nickel Iron) batteries. I think they have a slightly different voltage than Nickel-Cadmium batts.
scottsAI:
Something I found: http://www.oceannavigator.com/site/csrv/content.asp?id=639
Wet nicad cells use a dilute solution of potassium hydroxide (KOH) in water, with small amounts of lithium hydroxide (LiOH). This facilitates an alkaline reaction, rather than the acid reaction of a lead-acid cell. But, unlike the lead-acid cell, the nicad electrolyte acts only as an electron-transfer medium, and does not change chemically as the cell is charged or discharged. Therefore, a hydrometer cannot be used to monitor the state of charge (SOC). A metering system is needed for tracking SOC (which is of course more convenient). An accurate voltmeter is the minimum requirement, but ideally there should also be metering of current flow and an amp-hour calculation.
The voltage of a fully charged nicad cell is 1.65 volts, direct current (VDC), falling to between 1.00 and 1.15 VDC when fully discharged. Ten cells are therefore linked in series to make up a 12-VDC system. Nicad cells of various capacities are available that have the same voltage characteristics but differ in their amp-hour capacities and physical size. Cells linked in series should be identical (however, different strings of cells can be paralleled as long as the cells within each string are the same).
The cell you have pictured is TWO cells in series. That is why your seeing 2.47v.
Notice the two caps.
I have no idea where you can get replacement electrolyte.
Have fun.
jimjjnn:
Scott,
He may be able to find the electrolye online. Proper mixture ratio, he will have to find somewhere tho.
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