I'm sharing information about the MG5 LR battery I used in energy storage projects.
The 61kWh battery has a 96S1P configuration and uses giant 174Ah NMC cells from CATL.
The cells are arranged into six modules with two 8S groups.
Marking on the battery module:
Arrangement on the cell's group:
Each block has a BMS module:
Inside BMS module:
The BMS has two sections for monitoring each 8S cell. It's based on ADBMS6815, a new-generation BMS chip from ADI. It can monitor up to 12S cells.
Unfortunately, it is under NDA, and the full datasheet isn't available to the public. I think this chip is the successor to the popular LTC6811.
A picture of the primary BMS:
It uses LTC6820 for ISO-SPI communication with slave BMSs.
I was able to reuse the slave BMS modules; more on that in the following posts.
And finally, here is a picture of the battery without electronics and cables: