Quote:
Originally Posted by myoldyourgold View Post
For 12 volts which will go down quite quickly when not being charged at the same time you should only use not more than 6 N's (bipolar) plates.
Great reason not to use as 12V battery for bench testing.
Quote:
Originally Posted by shaunak
...used 25% NaOH...
Quote:
Originally Posted by myoldyourgold View Post
5 N's will be better for just a 12 volt battery but then should not be used in a car which has 13.8 volts or more.
Voltage and electrolyte concentration go hand-in-hand. Many people will tell you 28% by weight is "best" while a few others (like me) will tell you to go the opposite direction and target ~2% by weight.
Bottom line:
28% by weight? >= 13.8VDC? 6 bipolars (works great, but most corrosive and hazardous)
28% by weight? ~ 12VDC? 5 bipolars
2% by weight? >= 13.8VDC? 6 bipolars (good effing luck)
2% by weight? ~ 12VDC? 5 bipolars (not a chance)
2% by weight? >= 13.8VDC? 5 bipolars (works great, least corrosive and hazardous - you must use current limiting PWM)
Most likely 2-part solution to the problem you are experiencing?
Only test with the target voltage (so choose: 12V battery or 13.8V from charging system or power supply)
Remove 1 bipolar plate (if choosing 12V battery)
03-17-2013 03:19 PM