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1.
针对锂离子电池在高温条件下散热和低温条件下加热的新一代液冷热管理系统,研发了电池包制冷/加热系统实验平台。根据新一代液冷电池包的结构特点,在完成实验平台总体结构设计和关键部件选型的基础上,完成实验平台搭建。实验平台通过供液系统、制冷系统、加热系统、信号测量与数据采集系统,可以实现液冷电池包的热特性实验,为后续电池热管理系统的研发提供理论依据和技术支持。  相似文献   

2.
实时时钟CMOS RAM电路是微机系统板的外围设备子系统中不可缺少的组成部分.通常采用的主芯片是MOTOROLA公司生产的MC146818或与之兼容的82C206芯片.它包括:一百年日历、报警、一个可编程周期性中断的全日制时钟以及114字节的低能耗静态存贮器(CMOS RAM).此系统主要用于获得时间、日历和报警信息,以及用于系统硬件设备的配置和标准参数的设定.当系统关机后,由后备电池给静态存贮芯片(CMOS RAM)提供电源,以确保信息不丢失.在下次开机当我们进入SETUP菜单就能看到精确的时间和系统配置信息.  相似文献   

3.
合理管理电池组、提高电池组工作效率是无人设备需要解决的核心问题之一。现阶段的电池管理方案需要多种功能不同的芯片协同配合,导致设计过程中存在难度大、电路复杂、调试周期长、功能单一、通用性低、成本高等缺点。基于此,使用电池管理芯片BQ76940和控制芯片STM32L431RCT6设计了无人车的电池管理系统。经过验证,该系统总体设计方案可满足无人车电池管理的多种需求。整个电池管理系统的采集、保护、控制响应速度和工作效率均优于大多数电池管理方案。  相似文献   

4.
针对目前锂离子电池RUL的预测中用来表达退化特征的健康因子(HI)存在信息不足的缺陷,提出一种锂离子电池RUL预测模型.首先提取出多个可以反映电池退化特征的参数;其次用主成分分析法(PCA)对提取的多个参数进行去冗余降维并充分包含退化信息;再引入集合经验模态分解(EEMD),对HI进行多尺度分解;最后基于长短期记忆网络...  相似文献   

5.
由于进行新能源汽车动力锂离子电池SOC估算的过程中产生了滞回电压现象,导致锂离子电池SOC估算结果不准确,估算时间较长,为此提出一种基于卡尔曼滤波的新能源汽车动力锂离子电池SOC估算方法.采用双极化等效电路模型作为基础,加入二极管构建新能源汽车动力锂离子电池模型,消除滞回电压现象造成的理论误差;同时将模型离散化处理,辨识锂离子电池参数;根据参数辨识结果,采用卡尔曼滤波算法估计新能源汽车动力锂离子电池SOC状态.经实验测试结果表明,所提方法的SOC值相对误差基本控制在-0.5%~0.4%左右,所提方法不仅可以有效提升锂离子电池SOC估算结果的准确性,同时还能够有效减少估算时间.  相似文献   

6.
设计并实现了一种基于三容水箱实验装置的网络实验系统,基于实验室的现有条件,提出了网络实验系统的总体框架,包括用户、服务器、控制器和实验装置4部分.采用SQL Server 2005建立了网络实验的管理系统,而采用Modbus协议实现了服务器与控制器的连接.在控制器中还采用DBCom建立了用户自定义控制算法接口.测试了前馈反馈控制等多个实际实验,并给出了典型控制响应曲线.结果表明,该网络实验系统使用方便、性能稳定,还兼容传统实验方式,系统具有较强的通用性.  相似文献   

7.
本文针对计算机与多个控制器构成的控制系统,提出了一种基于USB-RS232和CAN-R S232协议转换模块的多主通讯模式,与传统的基于R S232和R S485的主从通讯方式相比,不仅提高了通讯速度与效率,而且还提高了通讯的可靠性和稳定性.然后,从软硬件两个方面对所设计的USB-R S232和CAN-R S232协议转换模块进行详细的介绍.  相似文献   

8.
介绍一种基于MAX262可编程芯片的程控滤波器的设计方法.全面阐述了该系统的硬件构成、软件设计.该系统以AT89S52为主控制器,用于控制滤波器的工作模式、参数设置等,并带有键盘和LCD数码管显示功能.重点对CMOS通用开关电容有源滤波器MAX262中心频率f0、品质因素Q和工作方式等问题进行了深入探讨.  相似文献   

9.
针对某高校较多的多媒体设备,设计了基于校园网的多媒体设备远程集控管理系统,并介绍了该系统主要的结构、功能,着重介绍了中央控制器管理和利用Intel AMT技术实现远程管理的工作方式.结合多年从事多媒体设备管理实践,对学校多媒体设备管理系统提出了建立教室辅助教学平台、教学管理平台、实现多系统整合等一系列完善措施.  相似文献   

10.
介绍了一种基于CMOS摄像头路径识别的智能车控制系统.该智能车通过CMOS摄像头采集路面信息,利用图像处理技术进行路径识别,依靠舵机辅助智能车转向,使用直流电机驱动智能车前进.系统采用符合模糊PID控制算法的控制器对车的速度及转向进行精确控制,实现无人安全驾驶.  相似文献   

11.
锂离子电池其高能量、高电压、长寿命、无污染等优势成为人们的首选。硅太阳能电池可分为单晶硅电池、多晶硅电池、非晶硅电池。锂离子电池的充电过程可分为三个阶段即恒流模式、恒压模式及涓流模式。为此我们利用多晶硅电池,非晶硅电池作为主要的充电能源,对锂离子或者锂-聚合物可充电电池通过电池管理芯片,实现可移动太阳能锂离子电池充电。  相似文献   

12.
原有的冗余电池组电池管理算法采用的直接切换或等时间间隔切换算法,都存在不能使电池组放电达到尽可能大等问题。为了充分挖掘电池组冗余条件下的续航能力,提出新的冗余电池组管理算法。通过对剩余电量的冗余组合最大值估算法,推算出冗余电池组的置换顺序和时间点,实现冗余电池组的最佳算法。文章讨论了该算法的可行性,并给出理想条件下的模拟实验,最后分析了模拟实验结果。  相似文献   

13.
This paper presents a control strategy of a hybrid fuel cell/battery distributed generation (HDG) system in distribution systems. The overall structure of the HDG system is given, dynamic models for the solid oxide fuel cell (SOFC) power plant, battery bank and its power electronic interfacing are briefly described, and controller design methodologies for the power conditioning units and fuel cell to control the power flow from the hybrid power plant to the utility grid are presented. To distribute the power between the fuel cell power plant and the battery energy storage, a neuro-fuzzy controller has been developed. Also, for controlling the active and reactive power independently in distribution systems, the current control strategy based on two fuzzy logic controllers has been presented. A Matlab/Simulink simulation model is developed for the HDG system by combining the individual component models and their controllers. Simulation results show the overall system performance including load-following and power management of the HDG system.  相似文献   

14.
To solve the low power density issue of hybrid electric vehicular batteries, a combination of batteries and ultra- capacitors (UCs) could be a solution. The high power density feature of UCs can improve the performance of battery/UC hybrid energy storage systems (HESSs). This paper presents a parallel hybrid electric vehicle (HEV) equipped with an internal combus- tion engine and an HESS. An advanced energy management strategy (EMS), mainly based on fuzzy logic, is proposed to improve the fuel economy of the HEV and the endurance of the HESS. The EMS is capable of determining the ideal distribution of output power among the internal combustion engine, battery, and UC according to the propelling power or regenerative braking power of the vehicle. To validate the effectiveness of the EMS, numerical simulation and experimental validations are carried out. The results indicate that EMS can effectively control the power sources to work within their respective efficient areas. The battery load can be mitigated and prolonged battery life can be expected. The electrical energy consumption in the HESS is reduced by 3.91% compared with that in the battery only system. Fuel consumption of the HEV is reduced by 24.3% compared with that of the same class conventional vehicles under Economic Commission of Europe driving cycle.  相似文献   

15.
在大量先验数据的基础上,根据电池管理系统的采样数据,结合安时积分法和开路电压法,对电池SOC进行估算,同时考虑温度及单体电池的不一致性对电池性能的影响,根据不同温度与电池SOC之间的修正数据关系对上述算法进行高低端修正,实验结果表明此方法能够降低安时积分法估计电池SOC的累积误差,准确估算电池SOC,且具有较强的实用性和可靠性。  相似文献   

16.
Battery models are of great importance to develop portable computing systems, for whether the design of low power hardware architecture or the design of battery-aware scheduling policies. In this paper, we present a physically justified iterative computing method to illustrate the discharge, recovery and charge process of Li/Li-ion batteries. The discharge and recovery processes correspond well to an existing accurate analytical battery model: R-V-W's analytical model, and thus interpret this model algorithmically. Our method can also extend R-V-W's model easily to accommodate the charge process, The work will help the system designers to grasp the characteristics of R-V-W's battery model and also, enable to predict the battery behavior in the charge process in a uniform way as the discharge process and the recovery process. Experiments are performed to show the accuracy of the extended model by comparing the predicted charge times with those derived from the DUALFOIL simulations. Various profiles with different combinations of battery modes were tested, The experimental results show that the extended battery model preserves high accuracy in predicting the charge behavior.  相似文献   

17.
对太阳能、风能等非连续能源的利用和储存是当前储能领域研究开发的重点,全钒氧化还原液流电池是一种具有开发潜力的储能方式。通过对该电池技术的特点、开发应用前景以及在电极反应行为、隔膜的特性及电解液中钒的存在形式的研究进展予以介绍和评价。  相似文献   

18.
本文通过利用两块锂电池组合代替不能充电的九伏层迭电池改装实例,为降低部分电子产品使用成本及减少电池污染提供了一种参考方法。  相似文献   

19.
A lithium-ion polymer battery cell is an ideal energy source for underwater vehicles due to its high energy density and small volume. However, the performance of lithium-ion batteries in a 10 000 m deep sea is still unknown and is of particular concern in the design of 10 000 m autonomous remote vehicles (ARVs). In this paper, we explore how the external characterizing parameters of a LiFePO4 polymer battery during discharge are affected by a high pressure of 100 MPa and low temperature of 3 °C for simulating the conditions experienced in a 10 000 m deep sea environment. An unscented Kalman filter (UKF) algorithm is applied to estimate the state of charge (SoC) of a battery to investigate the influence of high hydrostatic pressure on SoC estimation due to changes in parameters. The results indicate that the LiFePO4 polymer battery works under 100 MPa hydrostatic pressure, but its parameters change obviously and influence SoC estimation. SoC estimation accuracy was improved through compensating the functions of open circuit voltage (OCV) versus the state of charge (OCV-SoC) of the battery in a 100 MPa hydrostatic pressure and a low temperature environment.  相似文献   

20.
针对软包锂电池表面缺陷检测,基于机器视觉技术提出了一种改进的自动检测方法。 对图像进行预处理后,将Canny 算子检测法和Close_Edges 算子检测法相结合,分割出软包锂电池表面的缺陷?最后以最小外接矩形法计算出划痕的长度和宽度,以累加法计算出针孔的直径。 实验结果表明该方法能够有效分割出软包锂电池表面的划痕和针孔,缺陷尺寸计算的误差低于5%。  相似文献   

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