What cell voltage are nickel cadmium batteries?
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Question by richard: What cell voltage are nickel cadmium batteries?
I have some Nickel Cadmium Batteries, each one has 2 cells . They are aproximately 15″ x 6″ x 8″, I guess they weigh about 10 kg each. It says the brand name is NIFE. I’m on a 12v solar power system for my home and need to know how many of these Nickel Cadmium batteries I need to replace my dying leadacid battery bank. At the moment a multimeter puts them between 2.4v and 2.8v per cell, but I don’t know their present state of charge
What do you think? Answer below!
5 Responses to What cell voltage are nickel cadmium batteries?
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chocolate
April 14, 2013 at 5:03 am
NiCads are 1.2 volts nominal. They usually hit 1.25 at full charge, but fall back to 1.2 very quickly.
Paschal H
April 14, 2013 at 5:49 am
The cell voltage you are reading sounds right for a lead-acid battery. No good for any other type though.
NiCd batteries are nominally 1.2v but on charge voltage will be about 1.4v.
I could be wrong but the cells you have maybe NiFe cells (Nickel Iron).
< http://en.wikipedia.org/wiki/Nickel-iron_battery>
Again, the cell voltage is 1.2v. NiFe cells are very robust. They will last for decades. Its limitations, namely, low specific energy, poor charge retention, and poor low-temperature performance, and its high cost of manufacture compared with the lead-acid battery led to a decline in use.
Numbat
April 14, 2013 at 6:37 am
I hope you mean 2.4 volts per battery, which is 2 cells. This puts the cell voltage at 1.2 volts, about right for Ni-Cd.
2,4 volts per cell doesn’t make sense.
billrussell42
April 14, 2013 at 7:15 am
it takes 10 nicad battery cells to make 12 volts. however if your equipment is designed for lead-acid, then it is not a 12 volt system but rather a 13.6 volt system, with the charge regulator often set at 14.5 to 15 volts. In this case, nicad replacement would be better using 12 cells (14.4 volt).
lare
April 14, 2013 at 7:23 am