BQ27411-G1: BMS for LTO(LiTiO2) cell

Hello guys,

I've recently tried to design a BMS for LTO(Lithium Titanate Oxide). Actually, I asked once in E2E forum before and got some comments I need to show tested data.

A test sequence is done for GPC(Gauging Parameter Calculator), according to SLVA725A doc. But the result of the online GPC report says the deviation is higher than 47% with bq27411.

I want to find out the right solution for 5S LTO battery pack system including some protection functions, balancing features, and gauging.

Here's cell info:

- voltage range: 1.5V-2.8V

- nominal voltage: 2.3V

- Max. discharge current: 50A

- Max. charge current: 30A

And here's the result of charge-dischage test.

LTO_chg_rest_dsc_rest.csv