20kW车用铅酸电池智能管理系统
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摘要
环境的不断污染、石油能源的加剧消耗促使纯电动车成为了各国各汽车厂商争相研究的对象。而阀控免维护铅酸蓄电池(VRLA)凭着其低廉的价格优势占据了车用蓄电池的大部分市场份额。本文旨在开发一套完整的VRLA蓄电池管理系统,包括蓄电池状态检测、均衡充放电管理、温度管理、充放电管理等。
本文首先讨论了车用VRLA蓄电池的特性,包括其失效模式、改进方式以及各种充电方法对其物理上的影响。随后,针对VRLA车用蓄电池,本文着重讨论了电动汽车蓄电池的智能管理系统,第三章到第四章详细介绍了装载车内的管理系统(检测系统、均衡系统):第五章着重讨论了置于车外的充放电管理系统的设计和实现。
状态检测系统系统主要包括电池状态采集系统以及剩余容量SoC、健康状态SoH测量系统。本文针对电动汽车这个特殊应用场合,提出了一种新的同时基于AH定律、Peukert方程、温度修正、SoH以及开路电压的的容量预测方法。
均衡充电系统的目的是保持串联电池组单体电池容量的均衡。均衡管理系统主要包括控制器、开关组件以及辅助均衡充电器三个部分。
主充电系统采用的是正负脉冲的充电方式,本系统通过一个全桥双向DC/DC变流器来实现。主充电器的功率等级为20kW,在本课题组中,这个功率等级较之以往有较大的突破。
Electric-Vehicles have become the research focus of most famous carmakers all over the world because of the problems in air pollution and petrolium crisis. Due to its low costs, the Valve Regulated Lead Acid (VRLA) batteries still remain the key position in applications for Electric-Vehicles. In this dissertation, a battery intelligent management system, which includes battery state detection, equalizing management, temperature management and charge/discharge management has been proposed.
The characteristics of VRLA batteries used to power Electric-Vehicles are discussed firstly. The failure modes, charge algorithms, also with the significant changes in VRLA batteries design are discussed in detail.
This dissertation mainly focuses on the battery management for (VRLA) batteries in the Electric-Vehicle applications. The management system inside the car(battery state detecting system and equalizing charging system) has been discussed in detail of the chapter 3&4. The chapter 5 proposed the charge/discharge management system outside the car.
The battery state detecting system measures the voltage and temperature of the batteries, then it estimations the state of charge (SoC) and state of health (SoH). A novel method used for estimation of SoC is proposed, which is based on AH principle, Peukert equation, temperature correction, SoH and open-circuit-voltage.
Here an equalizing charging system is designed to keep battery equalization during charging and discharging. The controler, switches and an auxiliary charger make up the equlizing system.
The Pulse charging/discharging method is adopted as the main charging algorithm. This charging algorithm is achieved based on a bi-directional full-bridge DC/DC converter. The power rating of the main charger is about 20kW.
本文首先讨论了车用VRLA蓄电池的特性,包括其失效模式、改进方式以及各种充电方法对其物理上的影响。随后,针对VRLA车用蓄电池,本文着重讨论了电动汽车蓄电池的智能管理系统,第三章到第四章详细介绍了装载车内的管理系统(检测系统、均衡系统):第五章着重讨论了置于车外的充放电管理系统的设计和实现。
状态检测系统系统主要包括电池状态采集系统以及剩余容量SoC、健康状态SoH测量系统。本文针对电动汽车这个特殊应用场合,提出了一种新的同时基于AH定律、Peukert方程、温度修正、SoH以及开路电压的的容量预测方法。
均衡充电系统的目的是保持串联电池组单体电池容量的均衡。均衡管理系统主要包括控制器、开关组件以及辅助均衡充电器三个部分。
主充电系统采用的是正负脉冲的充电方式,本系统通过一个全桥双向DC/DC变流器来实现。主充电器的功率等级为20kW,在本课题组中,这个功率等级较之以往有较大的突破。
Electric-Vehicles have become the research focus of most famous carmakers all over the world because of the problems in air pollution and petrolium crisis. Due to its low costs, the Valve Regulated Lead Acid (VRLA) batteries still remain the key position in applications for Electric-Vehicles. In this dissertation, a battery intelligent management system, which includes battery state detection, equalizing management, temperature management and charge/discharge management has been proposed.
The characteristics of VRLA batteries used to power Electric-Vehicles are discussed firstly. The failure modes, charge algorithms, also with the significant changes in VRLA batteries design are discussed in detail.
This dissertation mainly focuses on the battery management for (VRLA) batteries in the Electric-Vehicle applications. The management system inside the car(battery state detecting system and equalizing charging system) has been discussed in detail of the chapter 3&4. The chapter 5 proposed the charge/discharge management system outside the car.
The battery state detecting system measures the voltage and temperature of the batteries, then it estimations the state of charge (SoC) and state of health (SoH). A novel method used for estimation of SoC is proposed, which is based on AH principle, Peukert equation, temperature correction, SoH and open-circuit-voltage.
Here an equalizing charging system is designed to keep battery equalization during charging and discharging. The controler, switches and an auxiliary charger make up the equlizing system.
The Pulse charging/discharging method is adopted as the main charging algorithm. This charging algorithm is achieved based on a bi-directional full-bridge DC/DC converter. The power rating of the main charger is about 20kW.
引文
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