基于89C51的智能电池充电器的设计（硬件部分） 毕业论文.docVIP

基于89C51的智能电池充电器的设计 （硬件部分） 系 别：自动化系 专 业 班：电气自动化技术0601班 姓 名： 学 号： 指导教师： 2009年5月19日 基于89C51的智能电池充电器的设计（硬件部分） 89C51-based smart battery charger design (Hardware part) 摘 要目前，较多使用的电池有镍镉、镍氢、铅蓄电池和锂电池。它们的各自特点决定了它们将在相当长的时期内共存发展。由于不同类型电池的充电特性不同，通常对不同类型，甚至不同电压、容量等级的电池使用不同的充电器，但这在实际使用中有加强专业知识和专业技能综合应用能力的训练，培养实践动手能力创新精神 Abstract At present, There is more use of nickel-cadmium batteries, nickel metal hydride, lead-acid batteries and lithium batteries. Their respective characteristics they will for a long time to co-exist within the development. Because different types of rechargeable batteries of different characteristics, usually of different types, and even different voltage levels of battery capacity to use a different charger, but in practice there are a lot of inconvenience in use.According to research by the battery voltage at both ends of the value of different options to take charge.Single-chip technology has been adopted for the study, combined with theoretical knowledge of the classroom to complete the tasks set forth in the performance indicators in order to enhance professional knowledge and professional skills training competence, ability to train yourself in practice, teamwork and innovation. The design, the main circuit including the 89C51 single-chip and chip ADC0809 , DM74163N used as a divider, 74F138SJ used to generate and select Address. Of these, 89C51 of the crystal frequency of 11.0592MHz. Circuit has two input and output ports, Analog Voltage Input battery voltage as input, PWM contraltor is the battery pack as the output pulse width control. Key words: 89C51 ADC0809 timer interrupt PWM control technology 目 录摘要 I Abstract II 1 1 总体设计 3 1.1 智能充电器原理 3 1.2 PWM技术的应用 4 1.2.1 PWM软件法控制充电电流 4 1.2.2 纯硬件PWM法控制充电电流 5 1.3 89C51与ADC0809的接口设计 6 1.4 本章小结 7 2 硬件设计 8 2.1 89C51及特点概述 8 2.1.1 主要特性 8 2.1.2 管脚说明 8 2.1.3 振荡器特性 10 2.1.4 芯片擦除 10 2.1.5 结构特点 11 2.2 ADC0809及特点概述 12 2.2.1 主要特性 12 2.2.2 内部结构 12 2.2.3 外部特性 12 2.3