基于单片机的串联锂离子电池组监测系统设计

介绍一个以51系列单片机为主控单元的串联锂离子电池组监测系统。采用差分放大器和模拟开关轮流检测单体电池电压,利用单片机的IO接口和DS18B20实现单总线多点温度检测。系统简单经济,经过试验,能可靠、准确地对串联锂离子电池组进行监测。     

基于P89LPC936单片机的锂离子电池组智能充电机设计

为实现对不同标称电压的锂离子电池组的智能充电和容量检测,设计了一种基于P89LPC936单片机的智能充电机,充电控制电路采用IR2181S高低端边缘驱动器实现自动选择充电,能对电池进行快速充电和常规充电,利用电子负载对电池进行恒流放电,并检测电池电压,根据电流积分法计算容量,以此判断电池的老化程度。实验结果表明,该充电机能对标称电压为25.2 V和14.4 V的锂离子电池组实现1 h快速充电和容量检测,测试精度达到了99.8%。     

降压-升压型控制器延长手持式设备的电池工作时间

背景 在便携式产品中使用小型、高能量密度现代电池技术的电源应用必须在整个电池放电和再充电电压范围内高效率工作。这给需要3．3V总线电压、由锂离子和锂聚合物电池供电的系统带来了设计挑战。尤其是3．3V总线电压需要提供大干0．5A的负载电流时,更是这样。虽然降压型转换器擅长以高效率将2．7～4．2V的锂离子电池电压转换成较低的输出电压（如1．8V）,升压型转换器能高效率地产生较高的输出电压（如5V）,     

单节锂离子电池保护芯片与系统的设计

研究了一种单节锂离子电池保护芯片与系统,并成功设计了低功耗、高检测电压精度的保护IC。根据应用系统确定了保护芯片所需功能模块,然后采用0.6μm混合信号CMOS工艺制作。测试结果表明,该电路可以完成所有保护功能,正常工作时的功耗电流为3.1μA,过充电保护电压的检测精度达到了±25mV。     

蓝牙技术在锂离子电池在线监测系统中的应用

针对锂离子电池使用过程中出现的安全问题,设计一种实用的锂离子电池在线监测系统.介绍蓝牙技术的通信原理,详细分析使用数字信号处理器DSP组成的低功耗系统的软硬件设计和利用蓝牙技术进行无线数据传输及其功能实现.测试结果表明,利用蓝牙技术后,系统的精度大大提高,能更加准确地预测锂离子电池的健康状态,提高了锂离子电池使用的安全性.     

串联锂离子电池组荷电状态评估方法对比

分析了多芯串联锂离子电池组中各组成电芯初始荷电状态差异引起的安全问题,研究了充电电压、放电电压和开路电压与荷电状态对应关系,并进行了试验验证,定量分析和试验验证了电芯间的初始开路电压差异、初始放电电压差异、初始荷电状态差异三者与锂离子电池组安全性的对应关系,提出了初始荷电状态差异的考核方法。     

单节锂电池保护芯片

探讨了一种具有实用价值的锂离子电池保护芯片。在给出体系结构后,介绍了芯片内部模块的设计,包括电压比较电路、延时电路和电池状态监控电路。为了提高比较电压的精度,引入了电阻修调技术。在提出电容充放电延时结构的基础上,还采用增加电流源的方式来延长电路的延时时间。在电池状态监控电路中,提出了一种实现负值电压比较的电路结构。采用Cadence对电路进行仿真,获得了与原理分析相一致的结果。     

解决散热与PCB面积矛盾：线性电池充电器一马当先

虽然锂离子电池相对镍氢、镍镉电池具有高能量密度、轻重量、高电压、低自放电且充电方法相对简单等众多优点.但在给产品中的锂离子电池充电时一旦用了错误的电压或电流,极易损坏电池.为了消除这一顾虑,集成电路制造商设计了专门的充电器集成电路,以确保在变化的环境条件下,安全充分地给电池充电.     

串联蓄电池组电压巡检模块的设计

串联蓄电池组的电压一般较高,为电压检测带来了困难。为此提出了一种有效、可行的电压检测方案。方案中采用译码电路芯片和光耦继电器组成电压巡检模块,由单片机进行控制,蓄电池端电压依次进入A/D转换器,实现蓄电池组的电压巡检功能。由于光耦继电器的负载能力高且体积小,从而解决了强电与弱电间的隔离,并且使系统能够实现对电池数量较多的串联蓄电池组的电压检测。     

德州仪器Buck-Boost DC/DC转换器延长锂离子电池寿命

未来几年之内，消费电子将超过通信领域成为电源管理产品的应用大户，特别是便携消费产品。然而，以锂离子电池供电的便携系统也正在面临着严峻的挑战。如何满足不断提高的系统复杂性要求，如何满足更多的电压管理需求，如何在小体积内实现高功率，如何提高电池的利用率、延长电池的寿命，如何提高产品的性价比等诸多问题，正在困扰着锂离子电池供电系统设计人员。     

Recent Advances in Mn-Rich Layered Materials for Sodium-Ion Batteries

Branded with low cost and a high degree of safety, with an ambitious aim of substituting lithium-ion batteries in many fields, sodium-ion batteries have received fervid attention in recent years after being dormant for decades. Layered materials are a major focus of study owing to the extensive experience already gained in lithium-ion batteries, and the pursuit of a Mn-rich composition is critical to reduce the cost while retaining the performance. This review provides a timely update of the recent progress of Mn-rich layered materials for sodium-ion batteries based on the understandings of the phase forming principles, structure transformation upon cycling and charge compensation mechanisms and discusses potential ambiguities in the pursuit of high-performance materials.     

Overview of Graphene as Anode in Lithium-Ion Batteries

Graphene, as a fabulously new-emerging carbonaceous material with an ideal two-dimensional rigid honeycomb structure, has drawn extensive attention in the field of material science due to extraordinary properties, including mechanical robustness, large specific surface area, desirable flexibility, and high electronic conductivity. In particular, as an auxiliary material of electrode materials, it has the potential to improve the performance of lithium-ion batteries. However, wide utilization of graphene in lithium-ion batteries is not implemented since tremendous challenges and issues, such as quality, quantity, and cost concerns, hinder its commercialization. There remains a debate whether graphene can act as an impetus in the evolution of lithium-ion batteries. In this review, we summarize the desirable properties, several common synthesis methods as well as applications of graphene as the anode in lithium-ion batteries, seeking to provide insightful guidelines for further development of graphene-based lithium-ion batteries.     

单节锂离子电池保护芯片的设计

锂离子电池的众多优点使其在手提式设备中获得了广泛的应用。但与镍铬、镍氢电池不同的是锂离子电池必须和保护芯片配合使用。本文提出了一种单节锂离子电池保护芯片的设计，此芯片能有效防止锂电池应用中发生过充电、过放电和过电流状态。     

Lithium-ion batteries remaining useful life prediction based on a mixture of empirical mode decomposition and ARIMA model

Prediction of lithium-ion batteries remaining useful life (RUL) plays an important role in battery management system (BMS) used in electric vehicles. A novel approach which combines empirical mode decomposition (EMD) and autoregressive integrated moving average (ARIMA) model is proposed for RUL prognostic in this paper. At first, EMD is utilized to decouple global deterioration trend and capacity regeneration from state-of-health (SOH) time series, which are then used in ARIMA model to predict the global deterioration trend and capacity regeneration, respectively. Next, all the separate prediction results are added up to obtain a comprehensive SOH prediction from which the RUL is acquired. The proposed method is validated through lithium-ion batteries aging test data. By comparison with relevance vector machine, monotonic echo sate networks and ARIMA methods, EMD-ARIMA approach gives a more satisfying and accurate prediction result.     

锂电池保护电路的设计

详细介绍了采用PIC16C74单片机为控制核心的锂离子电池(7串电池组)保护电路的硬件、软件设计.利用PIC1 6C74单片机强大的判断和逻辑运算能力及软件的灵活性,实现了对锂离子电池工作状态的检测,及对锂电池的防过充电、防过放电及防止过电流功能.     

Energy Storage Mechanism,Challenge and Design Strategies of Metal Sulfides for Rechargeable Sodium/Potassium-Ion Batteries

Rechargeable sodium/potassium-ion batteries (SIBs/PIBs) with abundant reserves of Na/K and low cost have been a promising substitution to commercial lithium-ion batteries. As for pivotal anode materials, metal sulfides (MSx) exhibit an inspiring potential due to the multitudinous redox storage mechanisms for SIBs/PIBs applications. Nevertheless, they still confront several bottlenecks, such as the low electrical conductivity, poor ionic diffusivity, sluggish interfacial/surface reaction kinetics, and severe volume expansion, which distinctly restrain the battery performance. Meanwhile, the systematic insights into the design strategies of MSx for SIBs/PIBs have been seldom elaborated. In this review, the energy storage mechanism, challenge, and design strategies of MSx for SIBs/PIBs are expounded to address the above predicaments. In particular, design strategies of MSx are highlighted from the aspects of morphology modifications involving 1D/2D/3D configurations, atomic-level engineering containing heteroatom doping, vacancy creation, and interlayer spacing expansion, and MSx composites with other MSx, metal oxides, carbonaceous, and graphite materials to boost the comprehensive electrochemical performance of SIBs/PIBs. Furthermore, prospects are presented for the further advance of MSx to surmount imminent challenges, hoping to forecast feasible future orientations in this field.     

锂离子电池参数监测中的光纤传感技术

近年来锂离子电池安全事故频发对锂离子电池产业带来比较严重的影响,为减少此类事故发生,可采用电池管理系统对锂离子电池进行安全管理,保证其正常运作。管理过程中利用传感器对电池参数进行监测十分必要,光纤传感器具有体积小、抗电磁干扰能力强、可分布式测量等优势,可实现对锂离子电池的精准监测。文章从锂离子电池监测需求出发,简要介绍了三种主流光纤传感原理,并综述了各种用于锂离子电池监测的光纤传感最新研究成果,最后对光纤传感技术在锂离子电池参数监测中的应用做了展望。     

Feasibility Analysis of a Novel Cell Equalizer Topology for Plug-In Hybrid Electric Vehicle Energy-Storage Systems

To meet the stringent cost targets for hybrid electric, plug-in hybrid electric (PHEV), and all-electric vehicles, serious improvement in battery cycle life and safety is undoubtedly essential. More recently, lithium batteries, in the form of lithium-ion, lithium-polymer, or lithium iron phosphate, have profoundly been explored. Despite critical research initiatives, lithium-based batteries have not yet been able to meet the steep energy demands, long lifetime, and low cost, which are unique to vehicular-propulsion applications. One of the most practical techniques of improving overall performance is to use suitable power electronics intensive cell-voltage equalizers in conjunction with onboard energy-storage devices. There have been some interesting developments in this area during the last few years, but cost constraints and high current specifications have prevented the complete deployment of this versatile technology. The purpose of this paper is to introduce a novel configuration for a cell-voltage equalizer, with the potential of fulfilling the expectations of low cost, high current capability, and high efficiency. A comprehensive comparison between the theoretical novel equalizer, a typical equalizer, and the experimental prototype of the novel equalizer will be presented, which will help analyze performance, complexity, and cost.     

Intelligent control battery equalization for series connected lithium-ion battery strings

An intelligent battery equalization scheme based on fuzzy logic control is presented to adaptively control the equalizing process of series-connected lithium-ion batteries. The proposed battery equalization scheme is a bidirectional dc-dc converter with energy transferring capacitor that can be used to design the bidirectional nondissipative equalizer for a battery balancing system. Furthermore, it can be designed as a ripple-free converter for improving the input current distortion of the battery charge supply power system. A fuzzy-logic-controlled strategy is constructed with a set of membership functions to prescribe the cells equalizing behavior within a safe equalizing region for rapid cell voltage balancing. The simulation and experimental results show the advantage of the predicted equalizing performance of the lithium-ion battery stacks. The proposed fuzzy logic control battery equalization controller can abridge the equalization time about 32%. The proposed method maintains safe operation during the charge/discharge state in each lithium-ion cell of the battery strings.