Balancing is necessary in multi-cell batteries: the weakest cell limits the total performance of the battery. Managing cell balance to ensure optimum performance of the battery. The control of the charger is normally accomplished via the vehicle communication bus, which allows dialogue with other on-board equipment. The control is designed to react to data from the sensors associated with each battery module (telemetry boards), and responds according to parameters or special algorithms in the computer. The charger can be an onboard or outside.
Ĭontrolling the charger to ensure proper charge of the battery. The information is processed by the BMS to ensure correct battery operation. Ĭollecting information from sensors in the battery: current, voltage, temperatures, etc. The BMS must manage the system over the entire operating cycle of the EV/HEV vehicle, and has to ensure the following functions : Dirk Uwe Sauer at the RWTH Aachen and at the Institute for Electrical Energy Storage Technology led by Prof. Further, the typical functions of a BMS are shown with a focus on SoC estimation, detailing various estimation measures.Īs lithium-ion batteries and BMS are highly relevant in many sectors today, they are a well-researched field of science with numerous publications in scientific journals such as the Journal of Power Sources and are the special focus of the research groups at the Institute for Power Electronics and Electrical Drives led by Prof. The chapter presents different BMS structures and their applicability to battery systems depending on system size. Andrea further reviews many available commercial BMS solutions and specialty ICs and gives guidance on the deploying of BMS in battery systems.Ī more condensed treatment of the topic BMS can be found in the book Lithium- Ion Batteries in the chapter “Lithium-ion battery management” by Vezzini (2014). The book Battery Management Systems for Large Lithium Ion Battery Packs by Andrea (2010) is an exhaustive treatment of the topic BMS that further details many of the aspects introduced in this chapter, including BMS requirements, topologies, and design. Kuhn, in Advances in Battery Technologies for Electric Vehicles, 2015 11.6 Sources of further information
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