طراحی و ساخت یک مدار یکسان ساز ولتاژ بدون ترانس برای استفاده در مجموعه های باتری‌های لیتیوم-یونی سری شده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی برق و کامپیوتر، دانشگاه تربیت مدرس، تهران، ایران

2 دانشکده مهندسی برق و کامپیوتر،دانشگاه تربیت مدرس،تهرا،ایران

3 دانشگاه تربیدانشکده مهندسی برق و کامپیوتر،دانشگاه تربیت مدرس،تهران،ایران

چکیده

به دلیل کوچک بودن ولتاژ سلول‌های ذخیره‌‌ساز انرژی مانند باتری‌ها و ابرخازن‌ها، اغلب لازم است این سلول‌ها باهم سری شده و یک رشته را تشکیل ‌دهند. این قطعات نسبت به اضافه ولتاژ‌ حساس بوده و فرآیند شارژ و دشارژ باتری‌ها‌ و ابرخازن‌ها به دلیل تفاوت‌های اجتناب ناپذیرآنها سبب اختلاف ولتاژ آن‌ها، استفاده غیر ‌بهینه از ظرفیت این ذخیره‌ساز‌ها، کاهش طول عمر، و حتی انفجار می‌گردد. به منظور رفع این مشکلات و عملکرد ایمن و اقتصادی اغلب ذخیره‌ساز‌ها، استفاده از مبدل‌های یکسان‌ساز ولتاژ در عمل الزامی است. مدار پیشنهادی در این مقاله ضمن رفع مشکلات فوق دارای عناصر کمتری نسبت به ساختار‌های مرسوم بوده، ابعاد، هزینه، و پیچیدگی کمتری دارد و در یک فرکانس ثابت با کلیدزنی نرم و بدون نیاز به مدار فیدبک کار می‌کند و نسبت به مبدل‌های مرسوم اقتصادی‌تر است. در اینجا شبیه‌سازی‌ها و تحلیل حالت‌های کاری مبدل به همراه شکل موج‌های مدار برای چهار باتری لیتیوم-یونی سری شده ارائه شده است. جهت بررسی صحت عملکرد مدار پیشنهادی یک نمونه‌ی آزمایشگاهی طراحی و ساخته شده است. نتایج آزمایشگاهی حاصل، با تحلیل‌ها و نتایج شبیه‌سازی به خوبی مطابقت دارد و اختلاف ولتاژ باتری‌ها در شبیه‌سازی‌ها و در عمل به ترتیب کمتر از 5 و 10 میلی‌ولت است که نشانگر عملکرد صحیح مدار می‌باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Design and Implementation of a Transformer-Less Voltage Equalizer for Using in Series Connected Lithium-Ion Batteries Packs

نویسندگان [English]

  • Saeed Ghasemzade 1
  • Reza Beiranvand 2
  • Ali Yazdian Varjani 3
1 Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran
2 Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran,Iran
3 Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran,Iran
چکیده [English]

Due to the energy storage cells low voltage, such as batteries and super-capacitors, it is often necessary to connect them in series to form a string. Generally, these components are sensitive to over-voltage. Also, due to the inevitable differences in these devices, their charging and discharging processes cause their voltages to be different. This problem leads to inappropriate use of capacity, short life time, and even explosion. To overcome these problems and also to achieve safe and economic operation of these storage devices, employing voltage equalizer converters is necessary, in practice. The proposed converter can overcome the above-mentioned problems and it has less components than the conventional voltage equalizers, smaller dimensions, and lower cost. It operates at a fixed switching frequency under soft switching conditions without any feedback circuit and transformer. Therefore, it is more economic than the conventional voltage equalizers. Here, simulations and analysis of the different operating modes of the converter are given for four series connected lithium-ion batteries. To verify the given analysis and simulations, its prototype has been tested under different conditions. The experimental results are in good agreement with the analysis and simulation results, as well. The batteries voltages maximum differences in simulations and in practice are less than 5 and 10 mV, respectively, which indicate proper circuit operation.

کلیدواژه‌ها [English]

  • Battery
  • Series cell
  • Series resonant converter
  • Voltage balancing
  • Voltage multiplier
 
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