Forecasts indicate that by the end of this decade, e-cars will cost the same as conventional vehicles and will exceed their sales figures by 2038. To help automakers to achieve these goals, the chip manufacturer has developed an advanced Battery Management System (BMS) controller that provides the industry's best voltage measurement accuracy, increasing range and battery life, while additional temperature monitoring inputs improve safety.
The L9963 controller represents the latest generation of ST's BMS program, which has already produced semiconductor devices for joint projects with traction battery manufacturers. These include the cooperation with LG Chem, which began in 2008, and the collaboration with the Chinese R&D institute IMECAS and EPOCH, a technology company active in the field of electric vehicle batteries, which was announced in 2007.
The L9963 can monitor up to 14 chained battery cells and monitor voltages ranging from 1.7 V to 4.7 V with an accuracy of better than 2 mV to ensure optimal cell condition. The simultaneous digitization of all acquired values, which is probably the first time this has been realized in a battery management product, avoids delays in cell synchronization. The device can also monitor up to seven external temperature sensors, improving the system's ability to detect fluctuations and maintain stability.