Fatih KARA, İbrahim YÜCEDAĞ, Muhsin Uğur DOĞAN

Lityum iyon pillerde bulanık kurallara dayalı optimum şarj stratejisi

Bataryalar elektrik enerjisini elektrokimyasal enerjiye dönüştürerek depolayabilen yapılardır. Şarj akımının ayarlanması bataryalarda önemli bir husustur. Yüksek akımla şarj bataryaların kısa sürede şarj olmasını sağlar. Batarya şarj kapasitesi sıcaklığa ve akıma bağlı olarak değişmektedir. Batarya şarj akım değerini ayarlayan birçok çalışma arasında bulanık mantık kullanan çalışmalar da mevcuttur. Bu çalışmada, Lityum İyon pil şarjında bulanık mantığı kullanan bir yöntem önerilmektedir. Pil yüzey sıcaklığını ve ortam sıcaklığını giriş olarak alan ve çıkış akımını belirleyen bulanık bir denetleyici tasarlanmıştır. Panasonic NCR-18650B Lityum İyon pil üzerinde denemeler yapılmış ve sonuçlar bilgisayara ayarlanabilir akım gerilim cihazı ile aktarılmıştır. 5°C, 23°C ve 36°C ortam sıcaklığında test edilen pilin şarj kapasitesinde sırasıyla % 0,2; 2,5; 1,2 oranında kazanç sağlanmıştır.

Anahtar Kelimeler:

Bulanık Kural, lityum iyon pil, şarj, sıcaklık

Optimum charging strategy based on fuzzy rules for lithium-ion batteries

Batteries are structures that can store electrical energy by converting it to electrochemical energy. Adjusting the charging current is an important consideration in batteries. High current charging allows the batteries to be charged in a short time. Battery charge capacity varies depending on temperature and current. Among the many studies that adjust the battery charge current value, there are also studies using fuzzy logic. In this study, a method using fuzzy logic in Lithium Ion battery charging is proposed. A fuzzy controller is designed that takes the battery surface temperature and ambient temperature as input and determines the output current. Trials were made on Panasonic NCR-18650B Lithium Ion battery and the results were transferred to the computer with an adjustable current voltage device. Tested at ambient temperatures of 5°C, 23°C and 36°C, the battery's charging capacity gained % 0,2; 2,5; 1,2 respectively.

Keywords:

Fuzzy rule, lithium-ion battery, charging, temperature,

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