基于ZigBee技术的蓄电池容量监控方案

本文在论述ZigBee技术的特点、协议栈模型的基础上,重点阐述了目前几大IC厂商提供的器件和ZisBee技术的开发套件,提出了电动汽车电池管理系统中容量监控的ZisBee技术方案.     

基于CAN总线的电动车控制系统设计

针对电动汽车具有良好的能源和环保等性能.提出一种基于CAN总线的电动车控制系统设计方案,该控制系统能提高电动车控制系统间的通信可靠性.实现电池管理系统、电机控制器、充电机和整车控制器的实时通信和集中管理.使电动车运行更加实时和稳定.详细论迷了系统的总体结构、CAN通信协议协议的制定、节点硬件电路设计及软件设计.经过实验,各节点间通信实时可靠,验证了电动车控制系统的可靠性和正确性.     

技术动态

四项电动汽车国家标准出台近日,《电动汽车传导式充电接口》、《电动汽车充电站通用要求》、《电动汽车电池管理系统与非车载充电机之间的通信协议》和《轻型混合动力电动汽车能量消耗量试验方法》4项标准,顺利通过审查成为电动车＂国家标准＂。     

新能源汽车政策利好电机控制器市场受益

经过多年探索与努力,中囡电动汽车电池、电机、电控三大关键技术相继取得突破。业内专家普遍认为,中国电动汽车技术群体性突破的时期已经到来,电动汽车即将大规模进入市场。     

混合动力汽车锂离子电池监控——需要冗余吗?

目前,混合动力汽车(HEV)、插电式混合动力汽车(PHEV)和纯电动汽车(EV)的开发工作与锂离子(Li-ion)电池的使用密不可分,许多OEM、电子设备供应商和电池制造商探讨的重点都集中在如何构建最佳的电池监控和管理系统.这些系统当然需要一个主监控器,它通常是一个与微控制器或电池管理单元(BMU)接口的模数转换器(ADC),用来提供精确的测量数据并执行电池平衡(确保充电前所有电池处于同一电平).     

电动汽车动力电池状态实时监测系统构建探究

近年来,电动汽车在我国也得到了快速发展,其中,电池管理问题成为汽车行业内的关注热点,电池状态的实时监测至关重要,本文对电动汽车动力电池状态的监测系统进行探究,以期能够为电动汽车的电池实时监测提供帮助和借鉴.     

电池管理系统研究

随着新能源电动汽车等交通工具的问世推广,其核心电池管理系统的作用显得尤为突出,应用也越来越广泛。文章介绍了车用电池管理系统的主要功能、组成,简述了整个系统各个功能单元的工作方式,并在此基础上分析了现有系统的优缺点,指出目前电池管理系统需要攻克的技术难题,预测了未来技术的发展方向。     

电动汽车技术发展趋势及前景

本文对电动汽车技术发展趋势和前景作了概略介绍，并从技术一经济的角度出发，对纯电动汽车、混合动力汽车、燃料电池汽车以及动力电池、电机等关键零部件技术，作了综合评述，展望了电动汽车技术的未来发展前景。[编者按]     

中国已发布电动汽车标准75项 标准体系基本建立

正标准体系建设直接关系电动汽车产业的健康可持续发展。工信部会同国家标准委等相关部委,组织汽车、电力、电工等相关行业企业不断推进电动汽车标准体系建设。在各行业的共同努力下,目前我国已发布电动汽车标准75项,涵盖电动汽车基础通用、整车、关键总成(含电池、电机、电控)、     

电动汽车驱动器进入大规模需求时代

经过多年探索与努力,中国电动汽车电池、电机、电控三大关键技术相继取得突破。业内专家普遍认为,中国电动汽车技术群体性突破的时期已经到来,电动汽车即将大规模进入市场。目前,上海、北京、武汉等地已依托国有大型汽车企业成立了电动汽车股份制公司,这些地区正在加速建设产业基地。科技     

The state of the art of electric and hybrid vehicles

In a world where environment protection and energy conservation are growing concerns, the development of electric vehicles (EV) and hybrid electric vehicles (HEV) has taken on an accelerated pace. The dream of having commercially viable EVs and HEVs is becoming a reality. EVs and HEVs are gradually available in the market. This paper will provide an overview of the present status of electric and hybrid vehicles worldwide and their state of the art, with emphasis on the engineering philosophy and key technologies. The importance of the integration of technologies of automobile, electric motor drive, electronics, energy storage, and controls and also the importance of the integration of society strength from government, industry, research institutions, electric power utilities, and transportation authorities are addressed. The challenge of EV commercialization is discussed     

Electric vehicles-pursuing efficiency

The approaches being used to make electric vehicles (EVs) highly efficient given the limitations of EV batteries are described. They include reducing vehicle weight, aerodynamic drag, tire rolling resistance, and bearing friction; eliminating brake drag; and increasing the efficiency of the electric motor and its control electronics. The intrinsic efficiency of electric motors and the choice of power electronics are discussed. Energy management and the use of regenerative braking are examined     

Control Strategy of PWM Inverter Drive System for Electric Vehicles

This paper presents an advanced ac drive system used in electric vehicles (EV's). The system consists of an induction motor, a PWM transistorized inverter, a variable ratio gear box and a controller. The special features of the drive system are discussed, with emphasis on the control strategy which can optimize the performance of the EV.     

国内电动车用动力锂离子电池现状

锂离子电池具有比能量高、比功率大、使用寿命长(循环性能)、工作范围宽等特点,已经应用于纯电动汽车和混合动力汽车中。总结了国内电动车用动力锂离子电池的标准,以及电池结构、正极材料、负极材料、电解液、隔膜、电池管理系统等方面的研究现状,并对国内电动车用动力锂离子电池产业化现状和面临的技术难题进行了阐述。     

Electrothermal Analysis of Induction Motor With Compound Cage Rotor Used for PHEV

A new kind of induction motor with compound cage rotor (IMCCR) is proposed in this paper, in which rotor bars are composed of upper parts made of alloy (conductor for electric and magnetic) and lower parts made of cast aluminum. Calculation models for IMCCR electromagnetic field and whole region (including stator and rotor) temperature field analyses are established. From a motor electromagnetic analysis using the finite-element method, loss distributions are obtained, which are taken as the heat source in thermal analysis. In this paper, the starting and thermal performances of IMCCR operating under rated load are studied. From the comparison of the obtained results with test data, it can be seen that IMCCR would be a better choice for the driving system in electrical vehicles (EVs) and plug-in hybrid EVs (PHEVs). Furthermore, the influences of compound bar material on motor temperature distribution are analyzed, which would be helpful for the research on electrical materials used in machines. Considering the working conditions of motor used in PHEV and EV, the effects of ambient temperature and output load on motor thermal performance also have been studied.      

一种电动汽车用GPS导航系统的设计

近年限于环境和能源的压力,电动汽车及相关产业受到国内外广泛关注.电动汽车正常工作的前提是需要充足的电能,以至于及时为车载动力电池补充电能成为关键.该文分别从硬件和软件两方面介绍了一种基于ARM+Windows CE 6.0平台的车载导航系统.该系统采用GPS和GPRS相结合的技术,实现了在电动汽车电池电量低的情况下,通...     

Iterative learning control of antilock braking of electric and hybrid vehicles

Hybrid electric vehicles (HEVs) use multiple sources of power for propulsion which provides great ease and flexibility to achieve advanced controllability and additional driving performance. In this paper, the electric motor in HEV and electric vehicle (EV) propulsion systems is used to achieve antilock braking performance without a conventional antilock braking system (ABS). The paper illustrates that the antilock braking of HEV can be easily achieved using iterative learning control for various road conditions. A vehicle model, a slip ratio model, and a vehicle speed observer were developed to control the antilock performance of HEV during braking. Through iterative learning process, the motor torque is optimized to keep the tire slip ratio corresponding to the peak traction coefficient during braking. Simulations were performed on a compact size vehicle to validate the proposed control method. The control algorithm proposed in this paper may also be used for the ABS control of conventional vehicles.     

A Loss-Minimization DTC Scheme for EV Induction Motors

This paper proposes a strategy to minimize the losses of an induction motor propelling an electric vehicle (EV). The proposed control strategy, which is based on a direct flux and torque control scheme, utilizes the stator flux as a control variable, and the flux level is selected in accordance with the torque demand of the EV to achieve the efficiency-optimized drive performance. Moreover, among EV's motor electric propulsion features, the energy efficiency is a basic characteristic that is influenced by vehicle dynamics and system architecture. For this reason, the EV dynamics are taken into account. Simulation tests have been carried out on a 1.1-kW EV induction motor drive to evaluate the consistency and the performance of the proposed control approach     

A novel thermal management for electric and hybrid vehicles

Assuring the right temperature in battery compartments of an electric or hybrid vehicle is crucial for the safe operation and the achievement of optimal performance of the batteries. This paper is about the design, fabrication, and testing of a novel system for thermal management for electric/hybrid vehicles. This system is based on Peltier-effect heat pumps. The experiment results show the applicability of this type of technology for the thermal management for this type of vehicles.     

Lifetime modeling and simulation of power modules for hybrid electrical/electrical vehicles

In hybrid electrical vehicles (HEV) and electric vehicles (EV) power semiconductors, packaged in a module, are used. Packaging technologies are suffering several wear out mechanisms, that are typically induced by thermal or power cycling. The type of wear out mechanism is affected by the connection technology but also by the load type. In the design of the inverter the mission profile simulation of the power module is an important step to ensure operation of the power module over the complete vehicle lifetime. Influences of application parameters are presented. Physics of failure based FEM simulation can help to develop appropriate lifetime models which are basis for the mission profile simulation. Available power module technology achieves the lifetime requirement for hybrid electric vehicles/electric vehicles, if the described method is applied in the design phase of the inverter.