【作者】 姜娟；

【导师】 邹雪城；

【作者基本信息】 华中科技大学 ， 微电子学与固体电子学， 2007， 硕士

【摘要】 随着便携式设备不断小型化、轻量化和高性能化,普及率日益提高,作为其电源的二次电池市场正迅速拓宽,而锂离子电池的众多优点使其成为了二次电池的主流产品。但另一方面,由于锂离子电池的独特性质,决定了每一块锂电池中都需要嵌入一块锂电池保护芯片,以防止锂离子电池在充放电过程中有过充、过放、放电过电流以及短路等降低电池工作效率,缩短电池寿命和安全的异常现象出现。本文结合实用工程产品项目,探讨了具有高精度的单节锂离子电池保护电路的研究与设计,具有较大的实用价值和理论价值。本论文首先从锂离子电池保护电路的应用方式和基本功能入手,分析和设计了保护芯片的系统构架及模块划分,在此基础上,通过基准电路和修调技术的运用采用全定制方式设计了一种高精度的单节锂离子电池保护电路。主要电路模块由基准电路、取样电路、过充电检测电路、过放电检测电路、过电流检测电路、短路检测电路以及充电器检测电路组成。最后对所设计的电路进行仿真验证,从而达到设计的目的。本论文研究重点在于锂电池保护电路多种保护功能的实现和检测电压高精度的要求。本设计采用CSMC 0.6μm工艺,使用Spectre工具进行了仿真验证,仿真结果显示,该保护电路实现了多种保护功能并具有静态电流小、检测精度高、安全性好和可靠性高等特点。更多还原

【Abstract】 With the development of mini bulk, light weight, high performance and the popularization for portable electronic device, the rechargeable battery as its power market is rapidly expanding, and the many advantages of lithium-ion battery make itself as the mainstream product in the market of secondary battery. But on the other hand, because of the unique nature of lithium-ion batteries, a lithium battery protect-chip is embedded into each battery pack to prevent the abnormal phenomenon of lower battery discharge efficiency, shorten battery life and security which are caused by lithium-ion battery’s over-charging, over-discharging, over-current and short-circuit, etc. Combined with the research of the practical project, this paper discusses the research and design of high-precision single cell lithium-ion protection circuit and this work has great practical and theoretical value.This thesis begins with application ways and basic functions of lithium-ion battery protection circuit, then analyses and designs the system architecture and function modules, and on this basis, designs a high-precision single-mode lithium-ion battery protection circuit through the wide use of customized application for benchmark circuit and testing technology. The main circuit module is composed of benchmark circuit, sampling circuit, overcharge detection circuit, excessive discharge detection circuit, over-current detection circuit, short-circuit detection circuit and charger detection circuit. Finally, do the simulation test to the designed circuit simulation, and thereby achieve the objective of the design. The study has focused on the implementation of a variety of lithium battery protection function and the requirement for testing high precision of the circuit voltage.The design was simulated with the Spectre based on the CSMC 0.6μm process, and the simulation results manifest that the protection chip and system can finish a variety of protection functions, as well as low quiescent current, high detection accuracy, good safety and reliability.更多还原