毕业论文-基于STC89C52的智能锂电池充电器设计.doc

基于STC89C52的智能锂电池充电器设计 The STC89C52-based design of intelligent Li-ion battery charger Electronic Information Science and Technology 11-2 Dong Li-na Instructor Huo Hu Abstract In order to improve the charging efficiency and the effective protection during charging lithium-ion battery, this paper designs having a current-voltage detection function, can accurately control the charging process the charger, and gives each module circuits and software flow chart of the control unit section . Herein charger is a microcontroller core STC89C52 charger, through SCM TP4056 to lithium-ion batteries. In the actual charging process, TP4056 can automatically detect the battery status and Lithium-ion battery trickle charge, fast charge and constant voltage charge conversion. In addition, the design also uses the LCD display will charge and discharge status of the lithium-ion battery, the charging voltage, charging current and other information is displayed, the realization of the lithium battery charge control precision. By changing the voltage of the lithium-ion battery charging methods to achieve precise control, improved charging efficiency, and to ensure that lithium batteries will not overcharge, overheating and damage, greatly improving the safety performance and extend the life of lithium batteries, to achieve efficient charging function with circuit stability, high integration, can effectively protect the battery characteristics. Key words: intelligent charger, Current display, voltage display 目 录 绪论 1 1设计任务及总体方案选择 1 1.1设计任务及要求 1 1.2 总体方案的确定 2 2系统硬件配置说明 5 2.1主控制芯片STC89C52介绍 5 2.2 TP4056 6 2.3 芯片介绍 8 2.4 LCD液晶显示器的介绍 9 2.4.1 LCD模块的引脚 10 2.4.2 寄存器选择 11 3系统硬件电路设计 11 3.1 主控制器电路 12 3.2 充电电路 12 3.3 电压电流采集电路 13 3.4 液晶显示电路 13 3.5 系统硬件总体电路 14 4系统软件程序设计 14 4.1系统软件设计说明 14 4.2主程序软件流程图 14 4.3液晶显示器程序流程图 15 4.4 ADC0832程序流程图 15 5系统调试 16 结束语 16 致谢 17 参考文献 18 绪论 随着科学技术的不断进步，电子数码类产品发展也越来越快，便携式数码产品对电池的灵活性以及方便性有了更高的需要，锂电池以其显著优势迎合了这些需求，锂电池的工作电压高，体积小、重量轻、能量高，寿命长，可以安全快速充电，允许温度范围宽，放电电流小、无记忆效应、无环