STMICROELECTRONICS STEVAL-BMS114 Evaluation Board, L99BM114-TR, Li-Ion Battery Monitoring and Balancing

STEVAL-BMS114 is a battery management system (BMS) evaluation board that can handle from 1 to 31 Li-ion battery nodes. Each battery node manages from 4 to 14 battery cells, for a voltage range between 48V and 800V. The board is based on the L99BM114, a multicell battery monitoring and balancing IC, used in transportation and industrial application. The main activity of the L99BM114 is monitoring 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). The main functions of a standard BMS are monitoring and protecting the battery pack.

• Hosts the L99BM114 multicell battery monitoring and balancing IC
• Voltage monitoring of every single cell and of the entire battery node
• Voltage, current and temperature sensing of each cell
• 5 GPIOs to connect temperature sensors as NTCs
• An NTC hosted on the L99BM114 to sense the chip temperature
• Passive balancing
• Compact size: 100mm x 76mm