BQ76940: Complete 250A BMS for 6S and 11S LTO cells required

Matthew Longman

Part Number: BQ76940
Other Parts Discussed in Thread: BQ76952

We are looking for recommendations to finalize the design of a 250A capable BMS, utilizing the BQ76940 modules. These are intended for LTO battery packs in 6S and 11S configurations.

over 2 years ago

0 Luis H. S. over 2 years ago

TI__Mastermind 27180 points

Hello Matthew,

The BQ76940 is not recommended for Lithium-Titanate cells. It is intended to be used with higher nominal voltage batteries.

This is explained briefly in this older e2e thread: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/876800/bq76940-can-bq76940-be-used-for-lithium-titanate-cells

The BQ76952 is now released and may work, but we are suffering from stock issues at the moment. So these may not be readily available.

Best Regards,

Luis Hernandez Salomon

Power management

Power management forum

BQ76940: Complete 250A BMS for 6S and 11S LTO cells required