Experimental and Modeling Investigation on Thermal Runaway Propagation and Venting Gas in Cell-to-Chassis Lithium-Ion Battery System GAC Group: Guangzhou Automobile Group Co Limited

Format:

Book

Conference/Event

Author/Creator:

Ma, Niya, author.

Contributor:

Fan, Zehong

Jia, Yuan

Zhang, Anwei

Zhou, Wentai

Zhou, You

Conference Name:

SAE 2024 Vehicle Powertrain Diversification Technology Forum (2024-12-06 : Xi'An, China)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

Thermal runaway propagation (TRP) within lithium-ion batteries (LIBs) poses critical barriers to the safe operation and large-scale application of cell-to-chassis (CTC) batteries. Such events can lead to severe safety incidents, including explosions and fires, in systems utilizing these batteries. However, there is a lack of research on the thermal runaway model coupled with vented gases at the CTC systems. In this study, a thermal runaway coupling model for the battery pack system was established utilizing Star-CCM+ software, allowing for the examination of thermal runaway propagation characteristics and vented gas characteristics a within power battery systems based on the measured parameters of battery thermal safety characteristic. The simulation results indicated that once thermal runaway becomes uncontrollable, combustible flue gases escape through the exhaust hole located on the side plate of the cell, thereby facilitating heat transfer to adjacent cells. The primary components of the gases emitted from lithium-ion batteries include CO2, CO, H2, C2H2, CH4, O2, among others. Notably, CO2 and CO constitute a significant proportion of these emissions, accounting for 16.66% and 13.71%, respectively. This study elucidates the dynamic mechanisms that underlie the propagation of thermal runaway within a battery system, thereby providing suggestions for improving the safety design of the CTC battery system and early warning in the CTC, and contributing to trace the origin pattern of LIBs fire accident

Notes:

Vendor supplied data

Publisher Number:

2025-01-7011

Access Restriction:

Restricted for use by site license