DESIGN AND IMPLEMENTATION OF LIFEPO4 BATTERY MONITORING, PROTECTION AND MANAGEMENT IN ENERGIA: ELECTRIC ENERGY MANAGEMENT SYSTEM TO SUPPORT ONLINE LEARNING IN INDONESIA'S 3T AREAS

• Main Author: Giovanni, Ivan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66437
• Institution: Institut Teknologi Bandung

ii ABSTRACT DESIGN AND IMPLEMENTATION OF LiFePO4 BATTERY MONITORING, PROTECTION AND MANAGEMENT IN ENERGIA: ELECTRIC ENERGY MANAGEMENT SYSTEM TO SUPPORT ONLINE LEARNING IN INDONESIA'S 3T AREAS By Ivan Giovanni NIM: 13218006 (Undergraduate Program in Electrical Engineering) The development of digital technology has changed many sectors of human life, one of which is in the field of education. With the internet, all forms of learning information can be obtained easily. This encourages the increasing popularity of remote learning activities (PJJ). Moreover, during the Covid-19 pandemic, more and more PJJ activities were carried out in Indonesia. Even so, all the benefits of the flexibility and efficiency of distance learning are still not being enjoyed by Indonesian students in 3T areas (frontier, remote, underdeveloped) due to the lack of access to electricity and the internet. Related to electricity problems, some 3T areas still do not have electricity. The investment in providing electricity in the 3T area is very expensive, which hampers the electrification process in the 3T area. Therefore, Energia was developed as a portable electrical energy supply solution for PJJ in the 3T area. Energia is an electrical energy management system for renewable energy-based generation and storage to support distance learning in the 3T area. ENERGIA is equipped with a LiFePO4 battery with a capacity of 30 Ah which can accept input up to 220W and supply output up to 200W. As protection, a battery management subsystem is prepared to protect and maintain the battery in a safe working range. This is performed by monitoring the voltage, current, and temperature limits of the battery, as well as balancing the battery. Battery series voltage protection is carried out with the assistance of multiplexers and differential amplifiers. Battery temperature protection is carried out with the aid of the LM35 sensor and the fan as an active cooler. Current protection is carried out with the assistance of the ACS712 current sensor and MOSFET which is placed on the input and output of the battery. Meanwhile, passive balancers are designed to equalize the battery series voltage by dissipating power using resistors. Keywords: LiFePO4 battery, voltage protection, current protection, temperature protection, battery balancing