Hartono, Hartono and Sanjaya, Khen Nuhfus Thermal Monitoring System in Lithium Ion (Li-Ion) Batteries using Phase Change Material. IOP. (Submitted)

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Abstract

Batteries have an important role in the development of energy needs. Good battery performance, will support the devices it supports. In addition to the current and voltage on the battery, the temperature also affects the performance of the battery such as overheating, short circuit or even an explosion in the battery. One aspect of battery management is how the temperature inside the battery is always controlled. This will keep the battery always at the ideal temperature for optimal performance. The stages in software design consist of fuzzy logic design using microcontroller software. The input used is a voltage sensor using a voltage divider circuit and a temperature sensor max6675 thermocouple type-k. To display the system readings, a liquid crystal display is used in the Arduino IDE software. In the calibration process the average error on the voltage sensor is 0.635%, the current sensor is 4.68% and the temperature sensor is 0.14%. On the performance of the battery in charging lithium-ion batteries using the fuzzy logic control method in day and night conditions. At night conditions there is a decrease in temperature from 36.63 0C to 26.23 0C. Full charge voltage at 12.49 V with a long charge time of 6 hours 35 minutes. Meanwhile, during the day, the temperature increased from 30.91 0C to 38.27 0C. Full charge voltage at 12.33 V with a long charge time of 8 hours 54 minutes.

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