How can precise thermal characterization optimize Li-ion battery design and longevity? This paper highlights the significance of thermal management systems in balancing battery performance and lifespan. Through isothermal battery calorimetry, heat generation was observed in commercial Li-ion battery cells, assessing the impact of temperature, C-rates, and formation cycles. Module-level characterization revealed additional heat generated by interconnects. Testing of a 5 kWh battery pack exposed temperature non-uniformity due to inefficient cooling. Mitigating this type of challenge, thermal characterization, and multi-domain modeling help reduce design costs. These comprehensive findings help manufacturers enhance battery thermal management systems, ensuring optimal performance and extending battery life.
Published in Batteries, this research is highly relevant due to the journal’s specific focus on battery technology and related advancements. By presenting detailed thermal characterization of Li-ion batteries and proposing a combined modeling approach, this work directly contributes to the optimization of battery design, a key area of interest for the journal's readership.