Analysis of Electric Vehicle Batteries Subjected to Shock Loading
Date Issued
2012
Date
2012
Author(s)
Su, Wen-Hang
Abstract
In recent years, the issues of electric vehicles (EV) have been researched in many countries. Also, the safety is the most important issue in a variety of researches in the EV. Lithium battery which often used in the EV contains the advantages of high energy and power density. However, high activity of lithium metal also brings a very high risk. At present, the investigation on battery security merely focus on the circuit protection, chemical properties of battery cells and thermal management, but less to discuss mechanical parts. No matter how secure the circuit and other protection are, it still remains the possibility of failure when there are defects in the battery module mechanical design.
The research analyzed the 18650 cell battery module subjected to shock loading. To find out the key components which is broken and lead to module failure during shock loading. The research was using the finite element software simulates the situation of battery module be shocked. And then conduct an experiment to verify the accuracy of the simulation results. After that, discussing the various mechanical design parameters of the 1kWh battery module to change the maximum stress during shocked of the key component with the Taguchi method. By the method, a design principle is proposed to raise loading to withstand shock of the power battery module.
During 18650 cell battery module subjected to shock loading, the maximum stress occurred at the conductive component－nickel plate, and had the possibility of damage causing the battery module failure. And through researched and analysis, selecting the appropriate mechanical design parameters could reduce the stress of the nickel plate effectively, and enhanced the Reliability of the power battery.
Subjects
power battery module
18650 cell
shock test
finite element analysis
Type
thesis
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