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I've 3d printed end plates for my lishen 273A batteries. I've compressed the cell bij tightening the thumbscrews I've printed by hand at 50% SOC. The end plates have 20% infill, so they are a little bit flexible. When I charge to 3.4v you can hear the plates are being compressed.

I have put them in a eurobox as portable power. I think they fit in a half hight box as well.. I have 3d printed brackets to hold them in place. There is space left for cables etc.

Almost ready again, 3d printed brackets for compression and an enclosure for the BMS.

At the back the enclosure is open, and at the front there is the grille. But I will have to monitor it for a while. But with max Amps of 50 my BMS has never even got warm while carging or discharging. So I think it will be OK.

There was no cover over the cells. The battery was disconnected from the rest of the campervan. There was no power whatsoever on any other wiring. Only the charger, bms and battery where connected together. BMS is not heavily burned, it was behind the half of the cells that have survived. The...

I'm at work now, I'll try to share the STL files this evening (europian timezone)

It is at the top, but I will do a top balance to be sure. The WInstons did very very well.. 227Ah from 3.4 tot 3.1volts from 200Ah cells o_O

I Only charge to 3.4 / 13.6 volts. I barely loose any capacity. I have cell overvoltage set at 3.5v per cell. And programmad the BMS to read 100% when one of the cells hits 3.4. So I'm very much at the safe side, my cells will stay healty for a long time, I barely loose capacity..

Please don't use stainless steel scrub screws in the aluminium cells. They will corrode. Use normal galvanised fasteners

I really cannnot diagnose the cause. + and - both had a fuse. the 4s bms monitoring 2 cells per lead should not be a problem, it's common practice and the two cells per lead are parallel so should level each other. Only things I can think of are 1: the wiring of the charger has a bad contact and...

I have now completed my first Lishen 272Ah test as well. 285,64Ah removed. Two cells at 2,891v and one cell at 2,754v and one at 2,810v

Sorry, took some time, have been on a Holiday for a few days :) Here are my stl's !

Did a new test. Charged to 3.4v and discharged to 2,6v. Totall Ah was 541, so I'm happy!

I'm doing another test.. on eight cells 2p4s now.. Voltage of the Chinese capacity tester is off a bit.. I'll let you know the results tomorrow!

I had my charger set at 13.6v. But if one cell would have drifted the BMS is the only defence. But I have done a lot of test cycles and all cells were perfectly balanced. I've matched cells with the same interal resistance. I've polished all contact areas and almost had nog voltage drop accross...

I have now sanded all bus bars en battery posts, now the biggest voltage drop over the longest bus bar is 7mv at 50A Do you think that will be low enough?

Well... new campervan, new lishens.. fitmend not as clean as on the one that burned down, but everything works. A lot of work today, glued two solarpanels on the roof 1 x 340 wp panasonic HIT en one perc 200wp. Installed a 30A victron 220v charger, a victron orion 30A DCDC, a victron MPPT...

My cheap BMS has cell overvoltage protection as well. The camper was not insured unfortunately :-( ... I'm trying to forget about my loss. Today, with a friend, we have taken most of the interior out of the camper. The structure is mostly intact. I think it can be repaired, but it will take...

To return to my fire from a few weeks ago.. My cells were compressed, could it be a possibility that they didn't have enough room to expand during charging, and that something inside expanded and created an internal short?

VERY VERY VERY SAD ........ My thorougly tested 8x 272Ah lishens have been in my campervan for about a month now. Yesterday I walked by the van and I smelled smoke. I went in and this is what I saw: I'm not sure if my camper can be repaired :-( .. EVERYTHING EVERYWHERE under thick black...

that is a busbar for the negatives.. But was disconnected at the time of the fire.

No, I don't do that, cell are within 3mv of each other most of the time. Maybe they will drift a bit if you charge higher, but at only 3.4v they stay close to each other.

Ordered 12 cells on october 5th, still no trackable.. Poland shipper printed the UPSlabel but did nog receive the cells yet.. Hope they will arrive eventually..

I don't think it was scrubbing of the wires, the van has been parked al month. I was suspecting the chinese charger myself as wel, but the charger has the least fire damage of all, so I don't think it was. I still will not rule out an internal fault in one of the cells, because it is very...

That's fine, but I would clean and polish every bushbar and pole, because your internal resitance could be a little lower I think.

That's the second fire here on the forum? I have never found the cause of my fire, but it has cost me $ 40.000 dollars unfortunately :-( Now put a small pack of four cells again in my new campervan, still a bit scared...

From the 8 cells in my van four were completely melted, and four had medium fire damage, melted top vent etc. I've cycled the four cells lots of times now and they still perform like before the fire. They smell very badly so I did nt fit them to the new camper.

To answer all questions.. The charger was connected through an extension cord, because there was no mains power connected to the camper. It is circled down left in the picture. It is a Chinese charger, server PSU converted to charger, 50 amps but set to 30. Connected with sillicone wires with...

I've bought my display a few months ago, but it is in Chinese.. How did you set it to English?

In the back you see the four cells that have survived the fire. I've done a few capacity tests, and they are around 270Ah, so it seems the fire did not damage them. Vents have melted, and black top is also a bit melted. Now I have connected a few new 272 Lishen with a BMS. I haven't top balanced...