ESCL_에너지저장변환 실험실

Energy Storage Conversion Lab.

Publication

International

Thermal behavior of full-scale battery pack based on comprehensive heat-generation model
Content type 2019
Title of paper Thermal behavior of full-scale battery pack based on comprehensive heat-generation model
Author Kisoo Yoo, Jonghoon Kim
Publications Journal of Power Sources
Status of publication published
Vol 433
Link 관련링크 https://www.sciencedirect.com/science/article/pii/S037877531930686X 71회 연결

In this study, the heat generation and dissipation terms are classified for both irreversible and reversible heat.

The irreversible heat is formulated according to the Joule-heating model with internal resistance in order to

circumvent the calculation of electrochemical reactions that require significant computational loads. The internal

resistance in the Joule-heating model is determined via electrochemical impedance spectroscopy (EIS). The EIS

tests are conducted with state-of-charge (SOC) increments of 5%. To capture rapid changes in the internal

resistance, the EIS tests are conducted with smaller intervals in the 0–10% and 90–100% SOC regions. Additionally,

an analytical formulation of the resistance is derived from the electrochemical kinetic equations to

explain the rapid changes. Analysis reveals that the rapid changes are due to the Li intercalation phenomenon in

the electrodes. Thermal analyses are conducted according to the proposed model for Li-ion single cells, and the

simulation results exhibits good agreement with the experimental data. Finally, a thermal analysis for a full-scale

battery tray comprising 280 cylindrical cells is performed, and the applicability of the proposed model is

confirmed by comparing the simulation results with the experimental findings.