A new circuit topology for battery charger from 200V DC source to 12V for hybrid automotive applications

2016 IEEE Smart Energy Grid Engineering (SEGE) Pub Date : 2016-08-01 DOI:10.1109/SEGE.2016.7589544

K. Sayed, K. Nishida, H. Gabbar, M. Nakaoka

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引用次数: 7

Abstract

The research target is the development of the DC/DC converter for charging from 200V NiMH or Li-Ion battery to 12V Lead-acid storage battery in hybrid cars such as Toyota Prius. In car, a 12V Lead-acid storage battery is used to operate air conditioner, main lights and various actuators in engine control unit etc. Before the lead-acid battery ends up all the discharge, it should be charged using the alternator. In order to improve fuel efficiency, it is necessary to implement a so-called charge control, where the battery charge is executed in deceleration period avoiding the acceleration period of the car. In Hybrid cars, as a high voltage NiMH battery is equipped, it is possible to charge 12V Lead-acid storage battery from the high voltage battery. By using this scheme, it is realized not only to take off the alternator but also to improve braking touch for the car driver, because all regenerative energy can be absorbed in the high voltage battery. Furthermore the fuel efficiency can be improved easily for the reason why the efficiency of DC/DC converter is much higher than that of alternator.

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用于混合动力汽车的200V直流电源到12V电池充电器的新电路拓扑结构

研究目标是开发用于丰田普锐斯等混合动力汽车从200V镍氢电池或锂离子电池充电到12V铅酸蓄电池的DC/DC转换器。在汽车上，12V铅酸蓄电池用于驱动空调、主灯和发动机控制单元的各种执行器等。在铅酸蓄电池用完所有的放电之前，应该用交流发电机给它充电。为了提高燃油效率，有必要实施所谓的充电控制，即在减速期对电池进行充电，避免汽车的加速期。在混合动力汽车中，由于配备了高压镍氢电池，可以用高压电池为12V铅酸蓄电池充电。采用该方案，不仅可以省去交流发电机，而且还可以改善汽车驾驶员的制动触感，因为所有的再生能量都可以被高压电池吸收。此外，由于DC/DC变换器的效率远高于交流发电机，因此可以很容易地提高燃油效率。

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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2016 IEEE Smart Energy Grid Engineering (SEGE)

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