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Re: 12v Battery - All You Ever Wanted To Know

Posted: Sat Nov 21, 2020 1:46 pm
by RonSmithJr
OK, I was able to determine that the 12V battery had died, and replacing it (back in Sept.) fixed the problem.
However now I seem to be having problems with the battery again. Is it possible the battery has gone dead again so soon?

Alternately I checked the fuse for the battery, a 30 amp fusible link. It looks odd to me, but I have not been able to find any picture anywhere of what the fuse looks like when it is undamaged, so I am not certain if the fuse is the problem. Anyone have a picture of a good 30 amp fusible link (Mitsubishi I-miev 2012) they can share?

Re: 12v Battery - All You Ever Wanted To Know

Posted: Sun Nov 22, 2020 5:54 pm
by eldenh
The system uses a 120 amp fuse link on the right side of the positive connector to recharge the battery.

Re: 12v Battery - All You Ever Wanted To Know

Posted: Sun Nov 22, 2020 8:32 pm
by JoeS
RonSmithJr wrote:... Is it possible the battery has gone dead again so soon?...
Not so much dead (yet), but over-discharged. How often have you been using your i-MiEV?

I plug in a wall or solar float charger whenever I know I won't be using the car for even a couple of days, as it keeps the 12v battery from being cycled. Even a drop down to 12.20v means the 12v battery is down to 50%SoC. There is lots of information about lead-acid battery life vs. depth of discharge, all of which points to NOT wanting the battery to discharge much at all! For example, check out the DoD vs Cycle Life graph on this site: https://www.mpoweruk.com/life.htm

Re: 12v Battery - All You Ever Wanted To Know

Posted: Mon Nov 23, 2020 2:13 pm
by RonSmithJr
I tested the battery and it is fine, i.e. fully charged.
The 30 amp fusible link I am talking about, that looks odd to me, is left of and below the steering wheel (practically on the floor).
What is it supposed to look like when it is good?