JBD BMS setting verification (200a BMS, 304ah 4s 12v battery

[Ynot4me2]

Hi all, sorry if this has already been asked. I tried searching but could really find.
I'm finally finishing up my first DIY 12v battery. 4s 304ah. I did top balanced them a few weeks ago.
I've been playing around with the settings and I'm kind of getting lost in my notes.
This will for now simply be a drop in replacement for my current LA for our travel trailer (30a service). I will later be adding either a 1500w or 2000w inverter. Eventually some solar or DC to DC charging. Temps do sometimes fall below freezing so I've added some heating pads.
BMS is the JBD 200a 4s. (jbd-sp04s034).
If you could kindly look over my settings. I'm new and open to any recommendation.
Thanks in advance.

 

[sunshine_eggo]

Cycle capacity is the tested capacity. If you haven't tested it, enter 304000.

I recommend lowering charge temperature limits. 1) you never want the battery getting anywhere near that hot and 2) if it actually does get that hot, you don't want it charging.

The cell full @ 3500 is fine and is the value used for syncing the BMS to 100% SoC.
IMHO, the cell % values might be a bit off, but they are only used when the BMS has lost track of the SoC (power loss, extended storage period, etc.). Just important to realize that the BMS may show inaccurate SoC upon first connection or after extended periods of inactivity. A charge to 3.500V/cell or to over-voltage protection level will typically reset the BMS to 100%.
Charge limit/release to 45/40
discharge limit/release to 50/45
Batt over-voltage to 14600/14200
Cell over-voltage to 3650/3550
Cell under-voltage to 2500/2900
Charge over-current to whatever the BMS is limited to - 230A seems VERY high.
Discharge over-current to whatever the BMS is limited to - 230A seems VERY high.
Reducing the time value seems appropriate as well. Likely not more than 5s.
I would leave L2 and L3 protections as-is.

 

[Ynot4me2]

Cycle capacity is the tested capacity. If you haven't tested it, enter 304000.

I recommend lowering charge temperature limits. 1) you never want the battery getting anywhere near that hot and 2) if it actually does get that hot, you don't want it charging.

The cell full @ 3500 is fine and is the value used for syncing the BMS to 100% SoC.
IMHO, the cell % values might be a bit off, but they are only used when the BMS has lost track of the SoC (power loss, extended storage period, etc.). Just important to realize that the BMS may show inaccurate SoC upon first connection or after extended periods of inactivity. A charge to 3.500V/cell or to over-voltage protection level will typically reset the BMS to 100%.
Charge limit/release to 45/40
discharge limit/release to 50/45
Batt over-voltage to 14600/14200
Cell over-voltage to 3650/3550
Cell under-voltage to 2500/2900
Charge over-current to whatever the BMS is limited to - 230A seems VERY high.
Discharge over-current to whatever the BMS is limited to - 230A seems VERY high.
Reducing the time value seems appropriate as well. Likely not more than 5s.
I would leave L2 and L3 protections as-is.

Thanks again for your help.
Here's the updated version. I hope I didn't miss anything.

 

[sunshine_eggo]

Charge over temp limit/release to 45/40
discharge over temp limit/release to 50/45

I discussed temperature immediately prior to those settings but didn't specify over temp

I also missed bat under voltage/release of 10000/11600

 

[Ynot4me2]

Ok so I think I got it right now. Hopefully.

 

[roly1]

If you hit cell overvoltage, it disconnects charge bus until hitting release value of 3550 right?
As charge bus and discharge bus are the same this will disconnect loads, right?
So having a 4s2p with two BMS's it is unlikely you will have an overvoltage on two banks at the same time
thus still having one bank to power crucial systems ie navigation, lighting etc?
Is there a facility to have an audible warning for over cell voltage?
I have warning over battery voltage, but that is for both in parallel from a system BMS.

Thanks, sunshine for your informative posts. Chinese manual is confusing.