文档介绍：毕业设计(论文)
基于MAX1898的锂电池快速充电器设计
学院信息工程学院
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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AT89C51和MAX1898可以控制实现预充,快速充电,及恒压充电。该设计可以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、AT89C2051单片机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充电电池的充电需要;充电状态显示的功能。通过光耦6N137可以实现定时切断MAX1898的电源,减少能耗,同时也延长了它的使用寿命。
关键词: 锂电池,充电器,单片机,AT89C51, MAX1898
Abstract
In our daily lives, mobile phones have e increasingly important. We often need to use the phone, making phone calls, text messaging, , watching movies, listening to music, play games and so on. With the advent of large screen and high-frequency mobile phone, the lithium-ion batteries e more important, its lithium-ion battery charger by the consumers attention.
The main topic is to design a micro control unit based lithium-ion battery charger designed to AT89C51 and MAX1898 can be controlled to achieve the pre-charge, fast charge and constant voltage charging. The design can monitor the charging process in each state, the circuit is simple, low cost, and charge a good effect, including the safe, time consuming short, small, battery damage and to meet the requirements of general users. The article also has a more detailed introduction to the core of the device MAX1898 charger charging chip, AT89C2051 micro control unit.
The smart charger has a state of the detection of lithium-ion battery; automatically switch to charging mode to meet the charge of the rechargeable battery; charging status display function. through the 6N137 can be achieved from time to time to cut off the MAX1898 power supply, reducing energy consumption, but also extend its service life.
Key words: Lithium battery, Charger, SCM, AT89C51, MAX1898
目录
1 绪论 1
1
二次电池的性能比较 2
镍氢电池、镍镉电池与锂离子电池之间的差异 2
3
3
2 电池的充电方法与充电控制技术 5
5