A Solution for Lead-Acid Battery Global State Estimation

With hybrid and electric vehicles developments, the energy management in the car has become a major topic of research for the automotive industry. Battery monitoring systems (BMS) have been designed to avoid the battery breakdown, to keep their lifespan, and decrease the fuel consumption. The battery ability to deliver energy was the only aspect of its performances that was really studied by the automotive industry until the 21st century. The integration of more and more electronics in cars has led to take into account the power not only deliver by the alternator, but also provided by the battery, in order to ensure the availability of a growing number of vehicle functions. Most automotive battery breakdowns are due to a lack of power and rarely a lack of energy. Therefore, the battery available power needs to be monitored and taken in consideration in the BMS design.