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1、 题题 目：目：锂电池保护卡的电路设计姓姓 名：名：杨 沂 霖 班级学号：班级学号：0808014119指导教师：指导教师：陈 永 波摘 要锂离子电池因储能容量大、使用寿命长、清洁环保、能量体积比大等众多优点，所以在各行各业被广泛使用，逐渐成为了电池的主流产品。然而因锂电池的能量密度高，也使得难以确保其安全性，所以需要相匹配的电池保护电路来确保电池以及使用设备的安全。本文介绍了通过锂离子电池的充放电特点设计一种支持多种规格锂电池及电池组的保护电路的详细过程。本文以锂电池的充放电特点作为研究主体，详细阐述了作者在学士学位论文工作期间对锂电池充放电过程中对其保护的研究与设计。介绍了锂电池的特点以及
2、其保护电路的发展现状及趋势，其次说明了锂电池的充放电的概念、原理、制定目标设计参数以及保护电路的设计过程、实现方法。设计过程中，首先提出三种可行性方案，并通过理论分析进行方案筛选，确定由精工电子的电源管理芯片 S-8209 为核心构成的设计方案。然后通过对 S-8209 进行 Pspice 建模并仿真，验证其功能并为设计方案提供理论基础。然后绘制电路图，并施以改进优化设计方案。最后进行锂电池保护电路的调试，并对毕业设计期间的工作作出总结。关键词 锂电池；保护电路；电池组； Pspice 建模；S-8209AbstractLithium-ion battery is widely used in
3、 almost all walks of life, because of its large capacity, long useful life, environment friendly and large volume ratio of energy. It is becoming the mainstream products of battery. But its high volume ratio of energy is also the unstable caution of security. So it is necessary to match the battery
4、protection circuitry to ensure the safety of the battery and the equipment of using the battery.This article describes the adoption of lithium-ion battery charge and discharge characteristics of a variety of specifications to design a lithium battery group and battery protection circuit.In this pape
5、r, the charge and discharge characteristics of lithium battery as a research subject during the process. This article introduces the characteristics of lithium battery and its protection circuit development and trend, followed by shows the principles of lithium battery charge and discharge. And then
6、 make the design settings. During the design process, firstly proposed various of design options. Through theoretical analysis to determine the program, selected Seiko electronic power management IC S-8209 to achieve the design. Then carried out on the S-8209 Pspice model and simulation to verify it
7、s functionality and provide a theoretical basis for the design. Then draw the circuit diagram, and helping to improve optimization design. Finally, debug the lithium battery protection circuit and summary my work during the graduation project.Keywords: Lithium-ion battery；Battery protection circuit；
8、Pspice-modeling；Lithium-ion battery group；S-8209 目目 录录摘摘 要要.I Abstract.II 第第 1 章章绪论绪论.3 1.1 课题研究背景.3 1.2 课题的研究方向和发展前景.4 1.2.1 锂电池保护电路的现状 .4 1.2.2 锂电池保护电路的发展前景 .4 1.3 选题的目的和意义.5 1.4 设计要求.6 1.5 主要工作及流程.8 第第 2 章章技术背景及方案选择技术背景及方案选择.9 2.1 锂电池的介绍.9 2.1.1 锂电池简介 .9 2.1.2 锂电池的特点 .9 2.1.3 锂电池的充电原理 .11 2.1.4 锂电池的放电原理 .12 2.1.5 锂电池的工作过程 .12 2.1.6 锂电池保护的必要性 .13 2.2 锂电池充电器的介绍.13 2.2.1 锂电池充电器简介 .13 2.2.2 恒流恒压式锂电池充电器 .14 2.3 Pspice 仿真软件的介绍.15 2.3.1 Pspice 的发展与现状.
