I have Luyuan boxes with wheels and also build my
own banks. Here is the way I do compression on cells in the large banks, I'm currently building a bank for the shop.
Luyuan box assembly here. I used JK 2A active balancing BMS's in Luyuan boxes and slowed charge to achieve top balance. The JK will balance while charging above 3.4V and when not charging until cells settle below 3.4V. I just simply turn the charger on until one cell hits the high voltage disconnect setting of 3.6V, then turn the charger off and let the balancer do it's thing. I repeat this until my cells are balanced with a delta of 0.010V or less at my system bulk charge setting of 56.5V.
Thanks
I kind of look at the boxes as a fire break ..if bad things go wrong and fire flames up..... tiny bit of extra chance to get out if catch on fire maybe smoke trips alarm but often times the smoke gets us too. Mixed bag.
Clean install and looks to be same jk bms as going in mine. I was originally going to use the existing heaters. I used the foam in latest box build DO NOT STICK IT TO CELLS just toss the foam pads in. Off Grid Garage Andy was sticking the foam and I kept wonder why then he would complain. Don't stick the foam no need. It is a pita to get off once stuck.
"Only then come back here and rant about inaccuracy of the Victron shunt." Failure to take the above advice will lead to user caused inaccuracy. You can not expect SOC to be accurate until you have all cells top balanced. AND you have told the shunt when to sync. Do you need me to draw it...
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There was no way was using those rigid bus bars with my battery setup. They are going to move settle.
Those new flex are about 2x the weight too. The new flex bars were $55 or so the others came with my docan EVE 280ah cells.
I used my 3048 and grid to charge it took 8+ hours with lot of pulling back on currents with the 3048 back to avoid thermal over loads it was screaming about 11.4k put into them as delivered then top balanced. Would have been at it for a lot longer other way. None of the battery companies put that much time into batteries my Electric bill took bigger hit too. Now added another solar panel string it top and settles nicely with charging from solar. The jk bms 2a balancer inverter setup is working nicely. My SRNE Inverter will be lucky to ever see 5k much less 10k thrown at it.
As you know around 3.5v+ is when the curve starts swinging up. I am running my new battery little different. I'm happy with it.
Compression values for EVE most ppl miss the part with and without. The without fixture is going to offer less. I think my old 12volt pack cells have some distortion.
You are 100% about parallel batteries drawing less and it is therefore safer not going to run as hot ..... same applies to generators and inverter and such. PPL get in trouble when expecting parallel safety devices like on individual battery banks to protect them for the inverter hook up which needs to have a fuse or breaker as stated by manufacturer just for it. 1 battery with protection is okay but parallel with protection not for inverter.
What I found for jk inverter comms.... worked for me so far
Damn this thing took while get here. No manual in english. No software….in box … Not very global of the chinese to exclude other languages? I almost messed up got wrong cord vs 120 plug. No software either. I found them online from other sources. Hmmmmm over priced. The laptop...
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I'm not going back with the heaters. My original 12 volt cell packs had heaters. I am using Plywood for ends mild compression ....these old cells are already snafu. No more money is going into them... the all thread use to only cost a couple dollar but it was $15+ dollars now.
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Getting pex for covers over thread all because it what I have on hand. The jk bms cost money too. Aluminum plate is expensive now. These old cells are not so good anymore - they never were sat in warehouse at 0 SOC for who knows how long. No doubt the heater functions had come on and dragged them down - drained. That made them not so good too. Doesn't make sense to throw good money after bad after a point.
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