<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">Hi Mac</div><div dir="ltr"><br></div><div dir="ltr">I guess my question would how did this happen and why wouldn’t it happen again?</div><div dir="ltr"> It would seem the balance system didn’t work or isn’t working?</div><div dir="ltr">And I don’t know what kind of issues that could cause going forward. </div><div dir="ltr">I guess I’d be cautious about what could happen </div><div dir="ltr"><br></div><div dir="ltr">I have heard from a few people about relion batteries absolutely blowing up. No fires but total destruction. </div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Jan 9, 2025, at 9:26 AM, Mac Lewis via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div>Hey Wrenches,<br clear="all"></div><div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>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. <u>Are there any concerns (safety mainly) with reinstalling this unit?</u> </div><div><br></div><div>It is matching the voltage of the other cell banks nicely now. No real difference in temperatures either. Any other tests we should do?</div><div><br></div><div>Thanks!</div><div><br></div><div><br></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:'Times New Roman';font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div></div>
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