STMICROELECTRONICS STEVAL-BMS114TX Evaluation Board, L99BM114-TR, L99BM1T-TR, Battery Management System (BMS)

STEVAL-BMS114TX is a battery management system (BMS) evaluation board that manages from 4 to 14 battery cells. The main advantage of this evaluation board is ensuring isolated connection to an external MCU, thanks to the embedded transceiver. The board is based on the L99BM114 Li-ion battery monitoring and protection chip for high-reliability applications and the L99BM1T general-purpose SPI to isolated SPI bidirectional transceiver. The main activity of the L99BM114 is monitoring the cells and battery node status through stack voltage measurement, cell voltage measurement, temperature measurement, and coulomb counting. Measurement and diagnostic tasks can be executed either on demand or periodically, with a programmable cycle interval. Measurement data are available for an external microcontroller to perform charge balancing and to compute the state of charge (SOC) and the state of health (SOH).

• Hosts the L99BM114 multicell battery monitoring and balancing IC
• Hosts the L99BM1T general purpose SPI to isolated SPI bidirectional transceiver
• Voltage monitoring of every single cell and of the entire battery node
• Current sensing of the entire battery node
• 5 GPIOs to connect temperature sensors as NTCs
• CN1 connector that allows establishing communication with an MCU board via SPI
• CN2 connector that interfaces directly to an MCU board for control and diagnostic functions
• Passive balancing
• Compact size: 100mm x 76mm