I have:
32x 230Ah EVE cells. Supposed to be grade A blah blah. Bought from Docan about 2 years ago. Did not get them commissioned yet.
2x JBD BMS with 300A rated contactors (yes, I know, way overkill)
2x 250A class-T fuses
2x DIHOOL 200A MCCBs rated at ICU of 25kA and ICS 20kA
2x shunts with displays
A bunch of 10mil thick Mylar/PET sheets I was going to use as separators (but second guessing myself)
I was going to put them in plywood boxes using insulated threaded rods to keep them snug (I'm not doing some super crazy compression). These boxes were going to sit on open metal shelves that are bolted to the cinder block wall in my basement.
This hasn't happened yet. The end boards are cut and drilled but nothing is actually hooked up yet. Cells are just sitting happy waiting on me (I check them occasionally and no issues yet despite sitting this long)
After a recent big thread about someone's otherwise awesome setup going up in flames, I think about risks. Now I would think I'm covered against something going wrong pretty well between the contactors, breakers, AND class T fuses. Combined the breakers and fuses gives me the ability to quench 45kA in theory, and these packs aren't going to be capable of that much. But still, maybe an enclosed metal box is better.
Was thinking of Luyuan's DIY box, modified to fit my 230Ah cells, but then I saw @Tulex box here https://diysolarforum.com/threads/first-of-two-battery-builds.66085/
Raw box looks like this
It got me thinking a bit. I can buy those boxes for about $100 each.
I don't like the cells on their sides, so I'm now thinking take that box, lay it down, put cells inside, fab up a couple plate(s) with insulators of course to hold the cells in place. Stick the BMS in the end with the breaker, fuse, and my shunt/display.
Any reason I should skip that and just go with a prebuilt box, since I have to mod something to work anyway with my 230Ah cells?
32x 230Ah EVE cells. Supposed to be grade A blah blah. Bought from Docan about 2 years ago. Did not get them commissioned yet.
2x JBD BMS with 300A rated contactors (yes, I know, way overkill)
2x 250A class-T fuses
2x DIHOOL 200A MCCBs rated at ICU of 25kA and ICS 20kA
2x shunts with displays
A bunch of 10mil thick Mylar/PET sheets I was going to use as separators (but second guessing myself)
I was going to put them in plywood boxes using insulated threaded rods to keep them snug (I'm not doing some super crazy compression). These boxes were going to sit on open metal shelves that are bolted to the cinder block wall in my basement.
This hasn't happened yet. The end boards are cut and drilled but nothing is actually hooked up yet. Cells are just sitting happy waiting on me (I check them occasionally and no issues yet despite sitting this long)
After a recent big thread about someone's otherwise awesome setup going up in flames, I think about risks. Now I would think I'm covered against something going wrong pretty well between the contactors, breakers, AND class T fuses. Combined the breakers and fuses gives me the ability to quench 45kA in theory, and these packs aren't going to be capable of that much. But still, maybe an enclosed metal box is better.
Was thinking of Luyuan's DIY box, modified to fit my 230Ah cells, but then I saw @Tulex box here https://diysolarforum.com/threads/first-of-two-battery-builds.66085/
Raw box looks like this
It got me thinking a bit. I can buy those boxes for about $100 each.
I don't like the cells on their sides, so I'm now thinking take that box, lay it down, put cells inside, fab up a couple plate(s) with insulators of course to hold the cells in place. Stick the BMS in the end with the breaker, fuse, and my shunt/display.
Any reason I should skip that and just go with a prebuilt box, since I have to mod something to work anyway with my 230Ah cells?