Investigation of Battery Heat Generation and Key Performance Indicator

What is it about?

This research presents an experiment-based report on how a pouch-type Li-ion battery cell behaves and performs. The commercial test cell has a Lithium Titanate Oxide (LTO) based anode with 13Ah capacity. It measures how surface temperature distribution and heat flux change in it together. Contact thermocouples record temperatures on their surface while an isothermal calorimeter records their heat flux at once. This measurement determines how much it produces inside it. Consequently, using this outcome, its efficiency as an essential performance constituent is calculated. These occur at various temperatures (-5°C , 10°C , 25°C and 40°C ) of continuous charge/discharge constant current rate (1C ,2C ,4C ,8C ,10C (maximum )) . Both charging/discharging events affect its production significantly at various temperatures/C-rate levels. Its flux changes non-linearly which affects its efficiency non-linearly too for any temperature/C-rate level combination. The technique used profiles it precisely which helps create accurate data sheets for it that can aid researchers/engineers/stakeholders to advance various aspects of battery research.

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Photo by Pawel Czerwinski on Unsplash

Photo by Pawel Czerwinski on Unsplash

Why is it important?

Based on an experiment, this research reports on the performance and behavior of a pouch-type Li-ion battery cell with an anode based on Lithium Titanate Oxide (LTO). Researchers measured surface temperature distribution and heat flux to calculate important performance indicators such as efficiency and heat generation inside the cell. These measurements were taken at various temperatures (-5°C, 10°C, 25°C, and 40°C) under continuous charge/discharge constant current rate conditions ranging from 1C to maximum discharge rates up to 10C. Researchers found that heat generation varies significantly during both charging and discharging events depending on temperature levels or C-rate used for testing. Heat flux varies nonlinearly which impacts overall efficiency differently across various C-rates tested within specific temperature ranges. This information can be useful for constructing precise datasheets about LTO-based batteries that could help engineers improve their designs by optimizing thermal management systems using accurate models incorporating these findings. Overall, this study adds valuable knowledge towards improving energy storage technologies through a better understanding of how they behave under varying operating conditions while providing critical data needed when designing new products aimed at meeting future demands for more efficient power sources.

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