[RE-wrenches] Battery "event"

[Jerry Shafer]

Kris
the internal plates are soldered together and can fail open and have been
know to make a spark as they make contact again, you can see this in the
aftermath by looking where all the plates contact the bridge inside the
battery, when adding the water resulting in the cooling of the battery
likely triggered the event.
Jerry

On Fri, Jul 20, 2018 at 2:30 AM, Kristopher Schmid <solman at legacysolar.com>
wrote:

> Since we are talking batteries... I had a scheduled checkup on an
> inherited stand alone system last Tuesday.  On Monday night, the client
> called to tell me that a battery blew up in his face when he was adding
> water (no doubt to prevent being scolded by me regarding fluid level
> maintenance).  He assures me that there was no metal in the vicinity and,
> indeed, I saw no evidence of a short on the terminals.  Judging by the rest
> of the pack, it's likely that the plates were exposed and he was adding
> fluid with hard solar charging in progress.  Fortunately he only suffered
> an injured finger and a ringing in his ears.
>
> Best guesses at the cause of the explosion?
>
> Picture attached.
>
> Thanks,
> Kris
>
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