"Yes, I think that's right.
NI/FE batts do have a lower internal resistance
which would make them discharge faster.
I woory about those things less ,
even though you get less power in the long run.
I go for dependability.
The less I have to fool with it the better."
I agree with the above.
I still haven't found build
plans for NI/FE batteries, but
here is a build plan for lead batteries.
You use clean solid lead plates 1 mm - 4 mm thick.
You will make boxes of the plates
as shown in the picture below.
Punch the boxes full of small holes from outside
to inside (before folding) to prevent fillings
to move inside.
For the positive box-plates you need for filling
red leadsuperoxide Pb_3O_4.
For the negative box-plates you need for filling
yellow leadoxide PbO.
Both these filling
materials are mixed before filling
with sulphur acid - water mixture 136 : 1000.
The positive box-plates
are filled with the red mixture,
the negative with the yellow mixture.
(If you cannot get any leadoxide (the yellow stuff)
leadsuperoxide, the red stuff will work
for the negative ones, too.)
After closing all the boxes with their fillings
you will put them in a sulphur acid-water
mixture of 136 : 1000.
You can use for the case of the massplates
glass jars, ceramic jars, second hand commercial
battery cases, etc.
According to your desire for the voltage
you will contact as many negative and positive plates
in series or in parallel as you want.
The number of 'negative' plates should
be one more than the number of positive plates
so that in the row
there are 'negative plates' on both sides.
For charging the new battery
you need first to charge first the right way,
then for short time the wrong way
to get the battery living well.
After it starts working you
never charge the wrong way any more.
To find out in the beginning, which is the negative,
which the positive end lead of the battery,
you can use a weak salt-water mixture.
You put the leads in the salt-water separated
from each other. The negative lead will start bubbling
a lot (of hydrogen) the positive just a little (of oxygen).
PLEASE NOTE:
1) The qualities of these batteries are not known
to me.
2) The materials, especially sulphur acid are
dangerous. (ALWAYS IN THE MIXTURE
FIRST THE WATER THEN THE ACID!)
3) So please be VERY careful if you make these.
4) You have been warned!
5) I really wanted to know about the results,
if anybody tried to make these.
6) I wanted to get comments from experts
how to make these things better.
- I still wanted to find build plans for NI/FE batteries.
- The description here is a rough translation by me
from a book:
Ilmari Jäämaa:
"Nuorten kokeilijain ja keksijäin kirja";
Olavi Vuorelaisen uusima yhdestoista painos.
WSOY; Porvoo 1948
- Hannu
