The Design And Research Of Dynamic Lithium_ion Battery Management System Based On MSP430

With the social development, the amount of vehicles increases rapidly, which not only leads to increasing people’s requirement of oil, but also makes the environment pollution more serious than ever before. Many contries spend much on the research of the electric vehicle to mitigate this status. Energy-saving, environment-protection and safety are the three main agendas of automobile industry of the current world.But the cycle life and safety capability of Li-ion batteries have become the primary problems to hinder development. Currently the battery management system (BMS) was focused in the study for its mitigating the adverse effect of these problems. The Li-ion BMS was studied in this paper, a smart Battery Management System (BMS) based on MSP430 is designed.At the beginning, the background of the project and the BMS is introduced, and then the Li_ion battery technologies of the system are displayed, respectively researching the operating principle and performance characteristic. And then SOC estimate and equalizing management the two important and difficult problem of the battery management system are researched, setting up the model of status of charge(SOC),the combination of ampere-time integral and open circuit voltage is used, and a variety of compensation are introduced in actual estimates. A new equalizing management method is proposed.The system hardwares design are described in detail in this paper as emphasis, at the beginning,the function and structure of the system is introduced in general to adopt the distributed control structure, which accomplishes the management function of the system, and then the hardware design of each module in the system is given in detail, including the main board, the detection board and CAN communication module, providing the specific circuit design principles and design methods.In addition, the software of the battery management system is introduced. The design adopts modular structure, of which the function of each module are introduced. The main ideas of the main board and the detection board’s software design are analysed, and some float charts are also given.Finally, Printed circuit boards is produced according to the hardware design,and we debug the whole system including the hardware and software.