Title: Study on Thermal Propagation of Traction Battery and Systematic Optimization
Language: English
Authors: Jin, Min 
Qualification level: Diploma
Advisor: Kopacek, Peter 
Issue Date: 2021
Number of Pages: 61
Qualification level: Diploma
Thermal propagation is the most critical safety issue for a battery system in electric vehicle, this safety issue also affects the daily use and further promotion of electric vehicles. With the pursuit of vehicle and battery performance, the increasement of battery energy in limited space will bring more challenges to battery safety, especially thermal propagation inside the battery pack. Therefore, it’s important to understand the mechanisms of thermal propagation on battery system and improve the overall system safety level for electric vehicles. In this thesis, the background information and basic knowledge of battery thermal events including thermal runaway and thermal propagation are interpreted, the mechanisms of chemical reaction during thermal runaway of battery cell and thermal propagation inside a battery pack are introduced step by step at different battery system levels. The state-of-the-art batteries on the market are reviewed in terms of the thermal propagation related design in these battery systems. The typical development process of vehicle and battery system are introduced briefly and the potential optimization approach on different development steps are discussed in order to draw the focus point of improvement measures in this thesis. The major systematic optimization measures are discussed and mainly focus on detection, handling, and verification of thermal propagation. Some new materials and measures to prevent thermal propagation are discussed during the introduction of optimization approaches. This thesis provides practical information to engineers regarding safety design of battery system and support them to achieve a safer battery system design for electric vehicles. By implementing the systematic optimizations on different battery system levels, the hazard of thermal propagation can be limited in a certain safe range, therefore the probability of causing serious injury to the passengers can be greatly reduced.
Keywords: Thermal propagation; Thermal runaway; Electric vehicle; Battery system; Systematic optimization
URI: https://doi.org/10.34726/hss.2021.81436
DOI: 10.34726/hss.2021.81436
Library ID: AC16192313
Organisation: E017 - TU Wien Academy 
Publication Type: Thesis
Appears in Collections:Thesis

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