scholarly journals Full-scale Fire Suppression Tests to Analyze the Effectiveness of Existing Lithium-ion Battery Fire Response Procedures for Electric Vehicle Fires

2021 ◽  
Vol 35 (6) ◽  
pp. 21-29
Author(s):  
Ohk Kun Lim ◽  
Sungwook Kang ◽  
Minjae Kwon ◽  
Joung Yoon Choi
Keyword(s):  
Electric Vehicles ◽  
Fire Suppression ◽  
Lithium Ion ◽  
Incident Response ◽  
Fire Response ◽  
Foaming Agents ◽  
Fire Incident ◽  
Water Wetting ◽  
Significant Difference ◽  
Battery Packs

The number of registered eco-friendly vehicles has exceeded a million, and their market share has expanded. In this study, the effectiveness of existing fire response procedures for lithium-ion batteries, which are widely used in eco-friendly vehicles, was investigated by using water-based extinguishing agents, fire blankets, and flood barriers. Water, wetting agents, and foaming agents were sprayed on the underside of battery packs. A temperature decrease rate of ~0.08 ℃ was measured, and no significant difference was observed between the extinguishing agents. Continuous thermal runaway occurred when a fire blanket was applied, and the temperature inside the damaged battery pack rapidly decreased after water permeated its cracks. Quantitative analysis of fire suppression methods can provide information toward the development of practical fire incident response plans for electric vehicles.

Joining Technologies for Automotive Lithium-Ion Battery Manufacturing: A Review

2010 ◽  
Author(s):  
S. Shawn Lee ◽  
Tae H. Kim ◽  
S. Jack Hu ◽  
Wayne W. Cai ◽  
Jeffrey A. Abell
Keyword(s):  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Dissimilar Materials ◽  
Lithium Ion ◽  
Cell Types ◽  
Advantages And Disadvantages ◽  
Battery Packs ◽  
Hybrid Electric ◽  
Battery Cells

Automotive battery packs for electric vehicles (EV), hybrid electric vehicles (HEV), and plug-in hybrid electric vehicles (PHEV) typically consist of a large number of battery cells. These cells must be assembled together with robust mechanical and electrical joints. Joining of battery cells presents several challenges such as welding of highly conductive and dissimilar materials, multiple sheets joining, and varying material thickness combinations. In addition, different cell types and pack configurations have implications for battery joining methods. This paper provides a comprehensive review of joining technologies and processes for automotive lithium-ion battery manufacturing. It details the advantages and disadvantages of the joining technologies as related to battery manufacturing, including resistance welding, laser welding, ultrasonic welding and mechanical joining, and discusses corresponding manufacturing issues. Joining processes for electrode-to-tab, tab-to-tab (tab-to-bus bar), and module-to-module assembly are discussed with respect to cell types and pack configuration.

scholarly journals Electric Enabler

2017 ◽  
Vol 139 (12) ◽  
pp. 39-39
Author(s):  
John Kosowatz ◽  
Thomas Romer
Keyword(s):  
Production Process ◽  
Lithium Ion Batteries ◽  
Electric Vehicles ◽  
Lithium Ion ◽  
Battery Pack ◽  
Automated System ◽  
Price Point ◽  
Battery Packs ◽  
Full Capacity ◽  
Safety Systems

This article explains how Tesla batteries are making electric vehicles (EVs) affordable for customers. Tesla’s battery revolution began when CEO Elon Musk declared that it would sell a mass-market EV for just $35,000. To produce battery packs cheaply enough to reach that price point, Tesla reengineered not only the production process, but also the factory in which the batteries are made. The Reno, Nev., Gigafactory is not yet operating at full capacity, but it is expected to produce 35 GW per year of lithium-ion batteries, about double the present-day global production. Tesla partnered with Panasonic to revamp the production process, and ended up redesigning the chemistry of the battery itself. The standard “18-650” cell format used thousands of less-expensive commodity cells, similar to lithium-ion batteries used in laptop computers. Tesla replaced individual safety systems built into each cell with an inexpensive fireproof system for the entire battery pack. Now, they have begun producing the new “2170” cell, which delivers higher density through an automated system developed with Panasonic to further reduce costs.

Evaluating Real-Life Performance of Lithium-Ion Battery Packs in Electric Vehicles

2019 ◽  
Vol 41 (32) ◽  
pp. 1-11
Author(s):  
Verena Klass ◽  
Maårten Behm ◽  
Göran Lindbergh
Keyword(s):  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Real Life ◽  
Lithium Ion ◽  
Battery Packs
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