The L9963E from STMicroelectronics is a Li-ion battery monitoring and protecting chip serving high-reliability automotive applications and energy-storage systems. The chip can connect and monitor up to 14 stacked battery cells in 48-V and higher voltage systems.
Cell voltage as well as the current for the on-chip coulomb counting is measured with high accuracy. The device can monitor up to seven NTCs, with information transmitted through SPI communication or an isolated interface. Multiple L9963E devices can be connected in a daisy chain and communicate with one host processor via the transformer isolated interfaces.
Evaluation kits available for the L9963E include the EVAL-L9963E-MCU hardware tool to aid in the creation of a 48-V battery-management system (BMS). Or it can act as the lower stage of a distributed BMS, depending on total battery voltage; additional stages can be added with the EVALL9963E-NDS.
The AEK-POW-BMS63EN BMS evaluation board is able to address from 1 to 31 Li-ion battery nodes, with each node managing 4 to 14 battery cells at a voltage range from 48 to 800 V.
