Mine Lithium Battery Power Management System Design And Safety Evaluation

In recent years, the development of lithium iron phosphate is a new type of lithium ion batteries,compared with the traditionallead-acid, nickel metal hydridebatteries,has the advantages of high capacity, high output voltage, good charge and discharge characteristics, the large current impact resistance, stable electrochemical performance, wide operating temperature range, non-toxic, no pollution to environment, but there is also the consistency of batteries, battery overcharge of fear,so in actual use with the battery management system needs to be managed and protected. This paper involved the battery management system mainly for the coal mine refuge chamber emergency power field research and design, developing a 24V30 A lithium iron phosphate battery management system, the entire system using a multi-level control system architecture,enabling network operation, can also be used alone, flexible and convenient.Mine emergency power supply has its own particularity, in research and development in order to ensure the reliability of the system, but also to shorten development cycles, reduce development costs, the introduction of a safety evaluation techniques, the overall design of the system and the functional analysis of the validity of the circuit ensure reliable function perfect, circuits, and electronic engineering to achieve the perfect combination of safety engineering. Its main contents are as follows :(1) Study the performance of lithium iron phosphate. Learn the working principle of lithium iron phosphate battery, test the battery charge and discharge cycle characteristics and temperature characteristics, to provide a theoreticalbasis and reference for the research and development of control parameters of lithium iron phosphate battery system.(2) Completed the ARM+MAX17830 architecture of 24V30A(60Ah) lithium iron phosphate battery management system software and hardware design. Around the battery management system based on ARM+MAX17830 circuit design to solve short-circuit protection of low voltage high current, multi-level parallel network problems, control and technical issues such as multi-channel temperature acquisition charge and discharge. And around the actual needs of the completion of the mine emergency power battery management system programming.(3) To achieve a combination of electronic engineering and safety engineering. In the development process of the battery management system, introducing safety assessment techniques to design circuit validity, reliability analysis, and improve the system stability, but also can effectively shorten the development cycle, reduce production costs and promote the application of safety assessment technology in electronic product development process.