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Research on Formation Energy Feedback Control System of Lithium Power Battery

Author: WangShu
Tutor: ZuoXiaoTian
School: South China University of Technology
Course: Pattern Recognition and Intelligent Systems
Keywords: Formation of Li Power Battery Energy Feedback Single-phase PWM rectifier Bidirectional DC/ DC Synchronous Half-bridge Rectifier DSC
CLC: TM912
Type: Master's thesis
Year: 2011
Downloads: 160
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Abstract


On account of the current lithium power battery’s good application prospect and the problem of great amount of energy waste existing in the process of battery formation, proposed the design plan of the all-digital formation energy feedback control system of large capacity lithium power battery using a new type of special Digital Signal Controller TMS320F28035 and the design of hardware and software of the sustem. Employing single-phase voltage source PWM rectifier(hereinafter called single-phase VSR)and bidirectional DC/DC synchronous half-bridge rectifier as the system hardware power main circuit, using the double loop feedback plus feedforward one-cycle control algorithm, it realized the goal of lithium power battery’s charging and discharging processes and efficient dischargeing energy feedback into the grid.This paper firstly studied the charging and discharging technology of monomer power battery. Established mathematical model of single phase VSR, analyzed its principle and expounded dual polarity PWM modulation methods and its application in this type rectifier. Meanwhile analyzed single-phase VSR switch mode in the two modality of rectifier and inverter, deduced the control algorithm and obtained duty cycle expression in the two mode. Given the hardware structure diagram and designed hardware circuit and related parameters of the single-phase VRS. MATLAB/Simulink is used to simulate the designed single-phase VSR system , and the simulation results prove that the system parameters is correct and design algorithm is feasible.Gived the system employing main circuit principle diagram of the bidirectional DC/DC synchronous half bridge rectifier,discussed the four modality principle and process of the circuit in the working condition of charging and discharging. Also designed hardware parameters of bidirectional converter , and gived charging and discharging control algorithm.This paper designed the system software giveing the system software design total structure diagram and gived the concrete realization flowchart of the system main program and the main subroutines diagram.Also designed the hardware parameters of the bidirectional converter and gived the charging and discharging control algorithm.Finally actual built the energy feedback control system platform and gives the corresponding experimental waveform which showed that this article’s software and hardware design plan can better realize the ac current sine wave and unit power factor when the VSR worked as the rectifier or inverter , realizing goal of the power battery energy efficient charge-discharge feedback into the grid.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Battery
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