利用单片机控制锂电池的充放电以及升压和降压拓扑电路构成高效双向DC-DC变换器电路以提高能源利用率.单片机通过控制加法器和运算放大电路反馈端数字电位器阻值以实现实现输出电流步进可调,通过PID算法控制降压电路的反馈电压微调输出电压值提高输出电压稳定性,采用电流传感器和电压衰减电路,并结合单片机和卡尔曼滤波算法提高实时测量系统状态电压、电流测量精度.%In this paper, microprocessor is used to control the charging and discharging of lithium batteries as well as boost and buck topology circuit to form efficient bidirectional DC-DC converter circuit to improve energy efficiency. The microprocessor makes the output current stepping adjustable by controlling the adder and the operational amplifier circuit feedback end digital potentiometer resistance, controls the output voltage of the feedback from the step-down circuit voltage fine-tuning by PID algorithm to improve the output voltage stability, uses current sensor and voltage attenuation circuit and combines MCU and Kalman filtering algorithm to improve the voltage and current measurement accuracy in real-time system status measurement.
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