Proširenje postojećega sustava za identifikaciju termičkih karakteristika Li-ion baterijskoga paketa

master's thesis

• Title (english): Expansion of the existing system for the identification of the thermal characteristics of the Li-ion battery pack
• Author: Mihael Leljak
• Mentor: Mario Vražić (mentor)
• Committee member: Mario Vražić (predsjednik povjerenstva)
• Committee member: Zlatko Hanić (član povjerenstva)
• Committee member: Marinko Kovačić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2023-07-03, Croatia

Abstract

Ovaj rad se bavi proširenjem postojećeg litij-ionskog baterijskog paketa te usporedbom termičkih karakteristika baterijskog paketa prije i nakon proširenja. U prvom poglavlju opisan je način rada te su navedene vrste i glavne karakteristike litij-ionskih baterijskih ćelija. U radu je dan opis baterijskog paketa i njegovog proširenja te je navedena korištena oprema. Postojeći baterijski paket sastoji se od sedam paralelno povezanih litij-ionskih baterijskih ćelija, a proširuje se sa dodatne dvije paralele, svaka po sedam litij-ionskih baterija. Mjerenja se provode prilikom punjenja i pražnjenja baterijskog paketa prije i nakon proširenja strujama 0.5C i 1C. Mjerene veličine su napon, struja i snaga baterijskog paketa te temperature baterijskih ćelija početne paralele.

Abstract (english)

The subject of this paper is the expansion of existing lithium-ion battery pack and the comparison of its thermal characteristics before and after the expansion. In this paper it is described how lithium-ion battery cells work. Types of lithium-ion battery cells and their main characteristics are listed, as well as the description of the battery pack, its expansion and the equipment used. The existing battery pack consists of seven parallel-connected lithium-ion battery cells and is expanded with two additional parallels, each containing seven lithium-ion batteries. Measurements are carried out during charging and discharging of the battery pack before and after the expansion at C-rate of 0.5C and 1C. The measured values are voltage, current and power of the battery pack, along with the temperatures of the initial parallel battery cells.

• Keywords: litij-ionska baterija; baterijski paket; termičke karakteristike; C-razina; punjenje baterijskog paketa; pražnjenje baterijskog paketa; faza konstantne struje; faza konstantnog napona; granični napon punjenja; struja kraja punjenja; napon kraja pražnjenja
• Keywords (english): lithium-ion battery; battery pack; thermal characteristics; C-rate; charging of battery pack; discharging of battery pack; constant current; constant voltage; voltage threshold; cut-off current; cut-off voltage
• Language: croatian
• URN:NBN: urn:nbn:hr:168:043927
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-10-11 09:31:50