The Design And Application Of Battery Mnagement System For High-power Supply

Valve Regulated Lead-Acid Battery is widely used in high-power energy storagedevices, EPS,power plant and other area. To improve the service life of batteries，andensure the batteries operate safety and efficiency,it is necessary to monitor andoptimal control the batteries on line. Battery energy management system is aintegrated terminal to monitor, optimal control and process the information of thebatteries.(1)In view of the characteristics of high-power supply,this thesis analyzesexisting different battery management systems based on the studying of manyreferences， and make a detailed introduction about the system’s mainfunction,technical parameters and the main research task assumed by the author.(2)The internal chemical reaction of high-power battery is complex. It’snecessary to analyze the theory of charge-discharge and make tests about it’scharacteristics, particularly putting emphasis on terminal voltage, internal resistanceand SOC.So we can get the specific impact about the discharge rate, temperature andself-discharge.(3)SOC Estimating is the most important part of battery energy managementsystem, and is also an important indicator of its performance.Based on existedresearch achievements, this thesis adapted improved Kalman filter with feedback loopand improved AH combined to estimate. The simulation results show that it has a highprecision.(4)Taking full-featured floating-point arithmetic series TI DSP-28335as thekernel of modular design,this article designs hardware modules about Voltage,temperature and current detecting.It is important and also difficult to monitor thebatteries’voltage, based on analyzing of traditional inspection methods, using optorelaysand integrated operational amplifier isolation inspection technology, this thesisdesigns a positive and negative voltage adjustable circuit. It can monitor batteryvoltage precisely.(5)Taking CCS3.3as the soft development platform, the thesis makes a designabout the system software framework and SOC Estimating software process, puttingemphasis on batteries’ state detection and the realization of SOC Estimatingalgorithm.and also make a detailed design serial communication protocols andinstructions for touch screen.In this paper,combined with the high-power batteries characteristics, it designs a battery energy management system using DSP as the kernel of modular.Finally, itmakes a test about the battery management system designed in this thesis.The testresults show that the voltage inspection error is less than1%and SOC estimationerror is less than5%.