Abstract
In order to understand the thermal behaviour of a lithium-ion battery, the heat generation within the cell should be determined. The entropic heat coefficient is necessary to determine for the heat generation calculation. The entropic heat coefficient is one of the most important factors, which affects the magnitude of the reversible heat. The purpose of this research is to analyze and investigate the effect of different parameters on the entropic coefficient of lithium titanate oxide batteries. In this research, a lithium ion pouch cell was examined in both charging and discharging situations. The state of charge levels range was considered from 10% to 90%, and vice versa, in 10% increments. The temperature levels vary from 5 °C to 55 °C and the voltage levels vary from 1.5 V to 2.8 V. The effect of different parameters such as initial temperature, state of charge, thermal cycle, time duration for thermal cycles, and procedure prior to the thermal cycle on the entropic coefficient of lithium titanate oxide batteries were investigated. It was concluded that there is a strong influence of the battery cell state of charge on the entropic heat coefficient compared with other parameters.
Highlights
A battery is an energy storage device
Lithium-ion batteries are extensively used for various applications such as laptops, cameras, mobile phones, automotive, and telecommunication
Low self-discharge rate, long cycle life, high open circuit voltage, high specific energy, and no memory effect are some of the advantages of lithium-ion batteries
Summary
A battery is an energy storage device. Energy-storing electrochemical batteries are the most important components for mobile and stationary applications. The most prevalent battery on the market for automotive usages is the lithium ion battery. A conventional lithium ion battery cell comprises of an electrolyte, a separator, and a pair of electrodes with current collectors. Lithium-ion batteries are extensively used for various applications such as laptops, cameras, mobile phones, automotive, and telecommunication. Low self-discharge rate, long cycle life, high open circuit voltage, high specific energy, and no memory effect are some of the advantages of lithium-ion batteries
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