Hi Mac I guess my question would how did this happen and why wouldn’t it happen again? It would seem the balance system didn’t work or isn’t working? And I don’t know what kind of issues that could cause going forward. I guess I’d be cautious about what could happen
I have heard from a few people about relion batteries absolutely blowing up. No fires but total destruction. Jay > On Jan 9, 2025, at 9:26 AM, Mac Lewis via RE-wrenches > <[email protected]> wrote: > > > Hey Wrenches, > > I am working on recovering a Lithium Iron Phosphate cylindrical cell battery > that has about 5 years of cycling on it. We didn't install this system but > they have 2 x Relion RB48V300 paralleled at a telecomm site. > > They are a pretty simple battery, just in a box with no easy way to pull data > unless you have some programming knowledge beyond what I have. We found that > one bank of the series cells was sitting at 0.9V, probably for about a month > or so. It was in parallel with another battery so it may have been longer. > > We were able to get it slowly charged up and the battery has cycled well a > few times in the shop, we have been able to easily pull about 90% of the > nameplate out without the cell dropping and getting BMS shutdown. Are there > any concerns (safety mainly) with reinstalling this unit? > > It is matching the voltage of the other cell banks nicely now. No real > difference in temperatures either. Any other tests we should do? > > Thanks! > > > > -- > > > > Mac Lewis > > "Yo solo sé que no sé nada." -Sócrates > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org >
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