I get that, I have questions for you though On Fri, 7 Aug 2026 at 00:34, (-Phil-) via EV <[email protected]> wrote:
> Yes, in the industry we call those "Spicy Pillows". Handle with care! > The mechanical stress can cause separator failure and if the cell still > has a high charge, it can go into thermal runaway. Yeah, If you are going > to replace cells, it's always a good idea to discharge them before taking > the compression off. > > On Thu, Aug 6, 2026 at 3:57 PM Mr. Sharkey via EV <[email protected]> > wrote: > >> Last time I bothered the list about this, replies from Cor, Jay and >> -Phil- who all chimed in to say that it's not necessary to discharge >> Leaf modules before removing the compression, just don't charge them >> without recompressing. >> >> Today, finally, I'm getting around to replacing the two >> half-defective modules in the 2P5S Leaf pack in my ElecTrak tractor. >> After removing the pack intact from the front battery bay, I put it >> on the bench and began loosening the 5/16" threaded rods that provide >> the compression. I reached the end of the threads on the rods, and >> there was still excessive compression, and a 3/8" gap had opened >> between the two defective modules, exposing the threaded rod at the >> top of the modules, which are side-by side in the pack. It appears >> that the defective modules have swollen appreciably, while the >> remaining healthy modules in the pack maintained their positions and >> don't seem to be excessively puffy. >> >> So, question: Is this normal and expected for defective modules? I >> have a feeling that one of the two bad modules had dendrites, as it >> would slowly lose charge while in storage with no other load >> connected. It would drag it's buddy-pair module to the same lower >> voltage, as each half-module is parallel connected to it's mate >> before being connected in series with the rest of the pack. >> >> I've begun discharging both of the defective modules completely, >> draining the charge with connected 12 volt, 50 and 100 watt >> incandescent lamps. I was going to do this anyway before sending them >> off to the recycle facility at our local town dump, but as a >> precaution, decided I'd drain them completely before releasing the >> remainder of the compression. >> >> Other then having a big steel bucket of water handy, would anyone >> like to offer suggestions on what I should expect once the bar clamps >> come off? I've clamped the pack such that I can remove the nuts from >> the threaded rods without blowing a hole in my garage wall. No sure >> how much expansion to expect or how many changes of clamps I'll need >> to reach full release. >> >> _______________________________________________ >> Address messages to [email protected] >> No other addresses in TO and CC fields >> HELP: http://www.evdl.org/help/ >> OT: If you use an Android device, please read >> https://keepandroidopen.org/ >> > _______________________________________________ > Address messages to [email protected] > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > OT: If you use an Android device, please read https://keepandroidopen.org/ >
_______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields HELP: http://www.evdl.org/help/ OT: If you use an Android device, please read https://keepandroidopen.org/
