单片机的锂离子电池电量检测系统设计方案(本科毕业论文).docVIP

河 南 科 技 学 院 毕 业 设 计 (论 文) 机电学院 系（院） 电气工程及其自动化 专业 毕业设计（论文）电动汽车电池电量显示系统 学生姓名 张友轩 班 级 电气工程及其自动化102班 学 号 20100344204 指导教师 宋长源 完成日期 2014 年 5 月 20 日 电动汽车电量显示系统 总计 毕业设计（论文） Abstract Compared with other types of batteries, the lithium-ion battery have many advantages, becoming an indispensable part of our daily lives. I believe that in the process of using lithium-ion battery, we often consider the question of how much power is left, but they can not find a good power detection method. for the requirements, we design a lithium-ion battery detection system based on MCU, the detection system can meet the demand for lithium-ion battery detection in our daily lives , in order to fully grasp the charge status of the lithium-ion battery. This paper describes the research and design of lithium-ion battery detection system based on MCU The system consists of a Analog acquisition module, battery detection module, MCU module and LED drive power display modules. the article describes the characteristics of the lithium-ion battery, the battery detection principle, structure and performance of the system,, focusing on the system hardware and software design. Taking into account the complexity of the detection system, accuracy, reliability, and other aspects, the article describes the design can meet the requirements of our lithium-ion battery detection. Key words：Lithium-ion battery BQ2040 Battery detection MCU LED display 目录 摘 要 I Abstract II 第一章 绪论 1 1.1 本课题研究的目的及意义 1 1.2 本课题研究内容 1 1.3 锂离子电池的放电及温度特性 2 1.4 锂离子电池电量检测系统的发展方向 3 第二章 系统总体结构设计 4 2.1 系统总体结构框图 4 2.2 单片机的选择 5 2.2.1 W78E365A40PL引脚说明 5 2.2.2 W78E365特性介绍 6 2.3 电池电量检测芯片BQ2040 7 2.3.1 BQ2040 引脚说明 7 2.3.2 BQ2040的检测原理 8 2.4 LED驱动控制芯片TM1629 9 2.4.1 TM1629引脚说明 9 2.4.2 TM1629特性介绍 10 2.5 数据传输存储芯片24C64 11 2.5.