How to monitor Multiple 48v Packs individually that are in Parallel for large Pack?

• I have six 48v Packs (200lb each) that will be used in parallel for one Very large (1200lb) 48v battery ~85kWh
• Each Pack will have its own Smart BMS, Bluetooth enabled
• Need to see all batteries at the same time. Not disconnect and re-connect between packs

Questions

1. Any BMS recommendations?
2. Will each 48v pack needs it own display specific to each BMSs Bluetooth?
3. Is there a BMS / App combo that will read the Bluetooth from all 6 48v batteries and display on a single screen.
4. Other suggestions to get full readouts from 6 48v packs that I am missing?

If I will need 6 displays. Anybody found a cheap / reasonable option?


Thanks in advance.

There are several options.
1- use 6 standard BMS. You can divide your expected max current draw by 6 if you want to scale down the size of the BMS as they are all in parallel.
2- using 5 active balance's The one I have has bluetooth interface so you can find all the devices individually and check cell voltages. Then use a single BMS (on the 6th) like Electrodacus http://www.electrodacus.com/ that supports remote relays. The single BMS monitors voltage and disconnects the entire parallel pack on HVCO or LVCO. (the other 5 ballancers ensure that the cells in those packs stay in balance)

a single shunt will monitor total watts into/out of the entire parallel pack.

EMUSBMS Centralized will do that. It's pricey, but it will handle the communication and master disconnect / charge for a large parallel pack etc.

Another Boot ass way of doing it would be to place multiple BMS's that have a disconnect feature and just string them all together IE in series so that if one of them shut off the whole pack will go down. You will want to set up a indicator circuit to show you which one it shut off.

Batrium wm4 does parallel strings.


This is what I am planning to use. I'm starting with two strings and will eventually have 4 16s strings.

There is also rec-bms that has a master/slave setup. You would need 6 slave bms and one master. This set up gets expensive.

I think the guy from barbados with the 10 strings is just using daly or smart bms on each string. Not sure if he has a special setup.