Combining electric vehicle battery charging and battery cell equalisation in one circuit

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-06-23 DOI:10.1049/els2.12031

Huaxia Zhan, Haimeng Wu, Musbahu Muhammad, Simon Lambert, Volker Pickert

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引用次数: 5

Abstract

Electric vehicles (EVs) require an onboard battery charger unit and a battery management system (BMS) unit that balances the voltage levels for each battery cell. So far, both units are two completely autarkic power electronics systems. The circuit presented here operates as a battery charger when the EV is connected to the grid and as a voltage balancer when the EV is driving. Thus, the proposed circuit utilises two functions in one and therefore eliminates the need of having two autarkic units reducing complexity and reduction in component count. The proposed circuit operates as a flyback converter and achieves power factor correction during battery charging. The constant-current constant-voltage (CC–CV) charging method is employed to charge the batteries. However, to limit the number of sensors that will be employed as a result of varying cells during charging, the battery current is estimated using a single current transducer and embedding a converter model in the controller. The operation of the circuit is presented in detail and is supported by simulation results. A laboratory prototype is built to verify the effectiveness of the proposed topology. Experiment results show that the proposed method provides an integrated solution of on-board charging and voltage equalisation.

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将电动汽车电池充电和电池均衡集成在一个电路中

吴海萌数学、物理和电气工程系埃里森大厦，诺森布里亚大学，纽卡斯尔泰恩，NE1 8ST，英国。电子邮件：Haimeng.wu@northumbria.ac.uk摘要电动汽车（EV）需要一个车载电池充电器单元和一个平衡每个电池单元电压水平的电池管理系统（BMS）单元。到目前为止，这两个单元都是两个完全自给自足的电力电子系统。这里介绍的电路在电动汽车连接到电网时用作电池充电器，在电动汽车行驶时用作电压平衡器。因此，所提出的电路将两个功能合二为一，从而消除了具有两个独立单元的需要，从而降低了复杂性并减少了元件数量。所提出的电路作为反激式转换器工作，并在电池充电期间实现功率因数校正。采用恒流恒压（CC–CV）充电方法对电池进行充电。然而，为了限制在充电期间由于改变电池而将使用的传感器的数量，使用单个电流转换器并在控制器中嵌入转换器模型来估计电池电流。详细介绍了该电路的工作原理，并得到了仿真结果的支持。建立了一个实验室原型来验证所提出的拓扑结构的有效性。实验结果表明，该方法提供了车载充电和电压均衡的集成解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.