1
\$\begingroup\$

I am working with a zinc air battery. When I short circuit my battery with a wire and record the voltage at the battery, my voltage is decreasing until 0 mV. Can I say that my battery is dead ? In other words, is a short circuit current equal to zero equivalent to a dead battery ?

\$\endgroup\$
0
2
\$\begingroup\$

Well there is an effect of relaxation in the battery. So after you remove the short circuit and let the battery sit for a while (30 minutes or something) it might build up some voltage again and you might squeeze out some more coulombs. I don't know how strong this effect is in zinc-air chemistries.

But when the short circuit was long enough for the current to drop to zero, your battery won't relax much and you basically killed it.

\$\endgroup\$
2
  • \$\begingroup\$ thanks! but where comes from this relaxation effect ? \$\endgroup\$ – velleda Jun 1 '17 at 14:45
  • \$\begingroup\$ @velleda good question but I don't know. I just know it exists at least in lithium based chemistries. \$\endgroup\$ – Arsenal Jun 1 '17 at 14:57
1
\$\begingroup\$

Yes, it is dead, or actually ' used up' ... by shortcutting all energy will flow from the plus to minus (or actually electrons from minus to plus) and all 'energy' is used.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.