مدل‌سازی عددی سیستم کنترل دمایی باتری لیتیوم یون در دمای اولیه‌ی پایین

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده فنی مهندسی، دانشگاه اصفهان، اصفهان، ایران

چکیده

دمای باتری لیتیوم یون تأثیر چشمگیری بر عملکرد آن دارد و حفظ دمای باتری‌ در دمای عملیاتی مناسب بسیار مهم است؛ به طوری که علاوه بر تأثیر بر عملکرد، امنیت و عمر بیشتر باتری را نیز تضمین می‌کند. در این مقاله، عملکرد یک سیستم کنترل دمای باتری لیتیوم یون با مجموعه‌ی ۶ سل در شرایط آب و هوایی سرد (دمای اولیه ‌oC20-) بررسی شده است. اختلاف دمای حداکثر و دمای میانگین باتری‌ها به عنوان معیارهای سنجش عملکرد سیستم کنترل دما در نظر گرفته شده و اثرات دبی، تعداد صفحات و آرایش جریان سیال ورودی شامل روش ساده، جریان مخالف و جریان مخالف زیگزاگ روی این دو مشخصه و بر زمان گرم شدن باتری بررسی شده است. با افزایش دبی سیال ورودی، باتری‌ها سریع‌تر به دمای عملکردی oC20 می‌رسند و اختلاف دما کاهش می‌یابد. با افزایش تعداد صفحات در دبی ثابت، سرعت گرمایش در دبی‌های بالا سریع‌تر خواهد شد. آرایش جریان مخالف زیگزاگ شکل، عملکرد بهتری از سایر موارد برای شاخص اختلاف دما دارد و تا 8 برابر اختلاف دما را کاهش داده و به 2/1 درجه سلسیوس در حالت حداکثری می‌رساند؛ اما سرعت گرمایش باتری در همه‌‌ی حالات جریان مخالف کندتر از آرایش جریان سیال ساده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Numerical Modeling of Li-Ion Battery Temperature Control System at Low Initial Temperature

نویسندگان [English]

  • Pedram Shamsizadeh
  • Ebrahim Afshari
Department of Mechanical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran
چکیده [English]

Li-ion battery temperature affects its performance, significantly, and keeping its temperature in proper operational temperature is obligatory; so, this guarantees the performance, safety, and life span of the battery. In this study, the performance of the planar Li-ion battery temperature management system with 6 cells in cold weather (initial temperature -20oC) is investigated. The maximum temperature difference and the average temperature of the battery cells are the two main performance criteria of the temperature management system. Effects of mass flow rate, number of heating plates, and flow arrangement consisting of parallel, counter, and zig-zag flow arrangements on the performance criterion and also on the warm-up time are studied. Results show that by increasing the fluid mass flow rate batteries reach the proper temperature (20 oC) faster and the temperature difference decreases. At a constant mass rate, the addition of heating plates decreases the warm-up time. The zig-zag flow arrangement has better performance in terms of temperature difference criteria up to 8 times and reaches 2.1 degrees at the maximum value, but parallel-flow warms up the batteries faster than the other flow arrangements.

کلیدواژه‌ها [English]

  • Li-ion battery
  • Temperature management
  • Cold weather
  • Operational temperature
  • Flow arrangement
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