###### Abstract
It is usually appropriately comprehended that enhancing the working temperature of a lithium-ion battery tends to raise the degradation rate [17; 18; 19; 20; 21]. The lithium-ion battery's spatial temperature difference could reason the state of charge drift and differences in current densities attributable to the temperature dependency of both the open circuit potential and proportion of discharge to charge pulse impedance [22]. Different investigations have been accomplished to determine the charge and discharge capabilities of different lithium-ion battery chemistries to enhance precision in the state of charge approximation and characterize lithium-ion battery performance at different temperatures [23; 24]. Different methods, including calorimetry, were used for thermal analysis of small lithium-ion batteries [25; 26; 27; 28; 29]. Throughout the working of the lithium-ion batteries, heat is generated within the lithium-ion batteries. Therefore, comprehension of heat generation is essential in diminishing the significant temperature effects in lithium-ion batteries. The irreversible part of heat generation is a sophisticated parameter to be calculated and is characterized in various procedures in dissimilar heat analyzing models and was employed for lithium-ion battery heat generation modeling. Dissimilar procedures were used for the determination of entropic. In [30], a specific load profile and thermal cycles were applied to the lithium-ion battery cell, and potentiometry was employed to approximate this heat coefficient. In [31], the effect of discharge current-rates and state-of-charge on the heat loss and efficiency of a lithium-ion battery was studied. The discharge current pulse step period was set to a ten percent state of charge. The incorporation of the heat flux throughout the stepped procedure gives in to the lithium-ion battery heat generation. In [32], reversible heat and irreversible heat sources were considered two principal sources of lithium-ion battery heat generation. The entropic heat coefficient was determined to estimate the heat generation within the lithium-ion battery. The reversible part of the heat generation rate was calculated from the entropy difference. The irreversible part of heat generation was calculated by use of current rate and internal resistance. In [33; 34], a lithium titanate oxide-based lithium-ion battery's thermal behavior and thermal behavior were studied under fast discharging and charging conditions by using an isothermal battery calorimeter. The previous investigations focused on understanding the lithium-ion battery's heat generation behavior during full charge and discharge cycles. Several researchers analyzed the thermal behavior and heat generation of lithium-ion batteries. A comprehensive list of all these attempts is available in Table 1. As demonstrated in the literature review, the prior studies on the heat generation measurement of lithium-ion batteries demonstrate extensive outcomes. Nevertheless, not many research papers have studied the heat generation rates of lithium-ion batteries suitable for different applications. In addition, less attention was paid to thermal characterizations of lithium titanate oxide-based lithium-ion batteries.