基于51单片机的智能充电器的设计详解.doc

摘要 在我们的日常生活中,手机已经变得越来越重要了。我们经常需要使用手机，打电话、发短信、上网、看电影、听歌、玩游戏等等。随着大屏幕和高主频的手机出现，锂离子电池就变得更加重要了，其锂离子电池充电器也受到广大消费者的重视。 该课题主要是设计一种基于单片机的锂离子电池充电器，在设计上，通过AT89S52和MAX1898可以控制实现预充，快速充电，及恒压充电。该设计可以通过LCD1602监控充电过程中的各个状态，实现电路简单，成本较低，而且充电效果很好，包括安全性高，耗时短，对电池损坏小，满足一般用户的要求。本文还对充电器的核心器件MAX1898充电芯片、AT89S52单片机以及LCD1602进行了较详细的介绍。 该智能充电器具有检测锂离子电池的状态；自动切换充电模式以满足电池的充电需要；充电电压显示的功能。实现定时切断MAX1898的电源，减少能耗，同时也延长了它的使用寿命。 关键词：AT89S52， MAX1898，LCD Abstract In?our daily lives, mobile phones have?become increasingly important. We often need to?use the phone, making phone calls, text messaging, Internet, watching movies, listening to music, play games?and so on. With the advent of large screen and high-frequency mobile phone, the Li-on batteries become more important, its Li-on battery charger by the consumers attention. The main topic is to design a micro control unit based on Li-on battery charger which is designed by AT89S52 and MAX1898 that can be controlled to achieve the pre-charging, fast charging and constant voltage charging. The design can monitor the charging process in each state and the circuit is very simple, low cost, and a good charging effect, including the character of safe, short time consuming, small battery damage and have met the requirements of general using. The article also has a more detailed introduction to the core device MAX1898, AT89S52 and LCD1602. The smart charger has the funtion of the state detection of Li-on battery, switching to charge mode automatically to meet the requirement of the battery,charging voltage displaying. This design has achieved shuting down the power of MAX1898, reducing energy consumption, and prolonging service life. Key words: Li-on battery, Charger, SCM, AT89S52, MAX1898,LCD1602 目录 引言 1 1绪论 2 2 1.2充电器智能化需求 2 1.3智能充电过程 3 2锂离子电池的介绍 3 2.1锂金属电池与锂离子电池 4 2.2锂离子电池工作原理 5 2.3锂离子电池使用注意事项 6 3硬件电路设计 6 3.2充电管理芯片MAX1898简介 7 3.3 MAX1898应用电路设计 11 3.4 AT89S52单片机简介 12 3.5 LCD1602简介 17 3.6 ADC0832模数转换芯片简介 22 4系统软件设计 24 4.1充电流程设计 24 4.2单片机控制设计 25 5结语 28 参考文献 致