Abstract
A lithium titanate oxide (LTO) anode based battery has high power density, and it is widely applied in transportation and energy storage systems. However, the thermal performance of LTO anode based battery module is seldom studied. In this work, a heat generation theoretical model of the battery is explored. The thermal performance of LTO anode based battery modules under high discharge rates is studied by both experiment and simulation. It is found that the temperature rise of the battery can be estimated accurately with the calculation of the equivalent internal resistance under different discharge rates. In addition, under the same depth of discharge, both the temperature rise and the temperature difference in the battery module increase with the discharge rates.
Highlights
A lithium-ion battery (LIB) is an important form of chemical power source, with high specific energy, long cycle life, wide operating temperature range, and flexible mobility [1,2,3,4,5,6]
The maximum temperature difference is smaller than 2 °C, which testifies are within the accepted range until 50% depth of discharge (DOD); when the discharge continues to that the heat generation can be estimated accurately by the equivalent internal resistance calculation
This paperand studies the thermal performance of lithium titanate oxide anode based
Summary
A lithium-ion battery (LIB) is an important form of chemical power source, with high specific energy, long cycle life, wide operating temperature range, and flexible mobility [1,2,3,4,5,6]. The methods of the electrochemical-thermal model and testing the calof 9 orific method are both complicated; they are not suitable for the calculation with a 2large number of battery cells. For both heat generation and heat dissipation, the research mostly concerns the battery cells under discharge rates smaller than 5C. The calculation of an the heat and we the proposed fast aheat generation estimation method for internal resistance used[25] It is found generation under higher discharge rate can be estimated using the HPPC with a shorter time scale.
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