Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
I finally read through this thread as it is poorly named and appears to only deal with JK-4S-200A.
It is OBVIOUS there is issues with Translation, in particular Series vs Parallel.
I am now in process of changing my Fleet of battery packs to JK B2A24S15P units, which includes 6 Packs Parallel and also my Utility Packs.
I am NOT installing anything in Series which only increases Voltage & stresses BMS' should one pack in series fail or cutoff.
I have TWO Packs made out of EV-LFP cells which I got used and have been troublesome from day one, then ripped apart and rebuilt as 24V/8S with a Chargery BMS & QNBBM-8S Active Balancer... They behaved but were "quirky" but did their job. They are switched over to identical configs, including new busbars (All Packs will be similarly setup with new Busbars for consistency). One of these packs did fail in the previous config because the QNBBM lost a channel and well, the packs cells got down to 1.7Vpc ! The cells were recovered after the long & tedious process.
These are now running in Parallel and powering my house, with the JK BMS'. Both of these packs are now behaving exceptionally well and the Delta Between cells is typically around 0.007mv +/- 0.003 pending if load or charge. Active Balancing is set to start at 3.7V (there is no 3.75) and works very well at that point.
(Midnite Classic-200) SCC Settings) have Absorb/Bulk set to 27.5V (3.437) for 30 Minutes, with the EndAmps at 12A. Then it enters FLOAT which is set to 27.4V (3.425) and the Variable Current allows everything to top nicely and quite quickly.
My Parallel Setup is very similar to what @upnorthandpersonal posted with the exception of Fuse Types.
I have even done a Limited Thrash Test (extended Max discharge & Max Charge) and Nothing Blinked at all. As the 280AH Packs go online in the Bank the tests will continue but I do not see any issues moving forward in Parallel.
Thanks to UpNorthandPersonal, he quickly helped me sort the "Jump Start" with 9V battery across the B- & P- and the CURSED Software ! Seriously that is a big problem as the only version that works is the enjpower-bms-3.7.4.88 while the most recent JKBMS_4.6.5.apk fails and THAT comes https://www.pgyer.com/Cfq3?spm=a2g0o.detail.1000023.2.61f83170MBnNsJ which is where the QR Scan Code leads you.
! FOR CLARITY !
It is OBVIOUS there is issues with Translation, in particular Series vs Parallel.
I am now in process of changing my Fleet of battery packs to JK B2A24S15P units, which includes 6 Packs Parallel and also my Utility Packs.
I am NOT installing anything in Series which only increases Voltage & stresses BMS' should one pack in series fail or cutoff.
I have TWO Packs made out of EV-LFP cells which I got used and have been troublesome from day one, then ripped apart and rebuilt as 24V/8S with a Chargery BMS & QNBBM-8S Active Balancer... They behaved but were "quirky" but did their job. They are switched over to identical configs, including new busbars (All Packs will be similarly setup with new Busbars for consistency). One of these packs did fail in the previous config because the QNBBM lost a channel and well, the packs cells got down to 1.7Vpc ! The cells were recovered after the long & tedious process.
These are now running in Parallel and powering my house, with the JK BMS'. Both of these packs are now behaving exceptionally well and the Delta Between cells is typically around 0.007mv +/- 0.003 pending if load or charge. Active Balancing is set to start at 3.7V (there is no 3.75) and works very well at that point.
(Midnite Classic-200) SCC Settings) have Absorb/Bulk set to 27.5V (3.437) for 30 Minutes, with the EndAmps at 12A. Then it enters FLOAT which is set to 27.4V (3.425) and the Variable Current allows everything to top nicely and quite quickly.
My Parallel Setup is very similar to what @upnorthandpersonal posted with the exception of Fuse Types.
I have even done a Limited Thrash Test (extended Max discharge & Max Charge) and Nothing Blinked at all. As the 280AH Packs go online in the Bank the tests will continue but I do not see any issues moving forward in Parallel.
Thanks to UpNorthandPersonal, he quickly helped me sort the "Jump Start" with 9V battery across the B- & P- and the CURSED Software ! Seriously that is a big problem as the only version that works is the enjpower-bms-3.7.4.88 while the most recent JKBMS_4.6.5.apk fails and THAT comes https://www.pgyer.com/Cfq3?spm=a2g0o.detail.1000023.2.61f83170MBnNsJ which is where the QR Scan Code leads you.
! FOR CLARITY !
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