MG5 LR Battery

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yasko
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MG5 LR Battery

Post by yasko »

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.
20230323_103214.jpg
Marking on the battery module:
20230323_104140.jpg
Arrangement on the cell's group:
20230323_115434.jpg
Each block has a BMS module:
20230323_103227.jpg
Inside BMS module:
20230323_105652.jpg
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:
20230323_111426.jpg
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:
20230323_150405.jpg
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