scholarly journals The Effect of Using a Metal Tube on Laser Welding of the Battery Case and the Tab for Lithium-Ion Battery

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4460
Author(s):  
Lanh Ngoc Trinh ◽  
Dongkyoung Lee
Keyword(s):  
Laser Welding ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Metal Tube ◽  
Lap Joint ◽  
Advantages And Disadvantages ◽  
Mechanical And Electrical Properties ◽  
Battery Case ◽  
Positive Effect ◽  
Welding Technique

Given the drawbacks of the conventional welding methods in joining the battery case and tab in the lithium-ion battery, the laser welding technique using the metal tube has been introduced for the weld. The metal tube is supposed to contribute a positive effect including protection to the outside structure by blocking the injection of the spatters, and minimization of the contact gap between the battery case and table. However, the use of the metal tube is believed to cause the plume trapped inside and affect the intensity distribution of the laser gaussian beam. Through the observation and analysis in this study, both advantages and disadvantages of the application of the metal tube on the weld have been analyzed. The use of the metal tube prevents the ejection of the spatter to the outside of the welding zone, as well as minimize the air gap between the battery case and tab in the lap joint weld is also minimized. On the other hand, the trapped plume inside the metal tube and the reduction of the energy of the laser beam have been considered to cause significant changes in the morphology, mechanical, and electrical properties of the weld.

scholarly journals The effect of using the metal tube on laser welding of the battery case and the tab for lithium-ion battery

2020 ◽  
Author(s):  
Dongkyoung Lee
Keyword(s):  
Laser Welding ◽  
Gaussian Beam ◽  
Lithium Ion Battery ◽  
Power Distribution ◽  
Lithium Ion ◽  
Metal Tube ◽  
Advantages And Disadvantages ◽  
Mechanical And Electrical Properties ◽  
Battery Case ◽  
Positive Effect

Abstract Given the drawbacks of the conventional welding methods in joining the battery case and tab in the lithium-ion battery, the laser welding technique using the metal tube has been introduced for the weld. The metal tube is supposed to contribute a positive effect on protecting the outside structure by blocking the injection of the spatters. However, the use of the metal tube is believed to affect the intensity as well as the power distribution of the laser gaussian beam. Through the observation and analysis in this study, both advantages and disadvantages of the application of the metal tube on the weld have been clarified. The use of the metal tube prevents the ejection of the spatter to the outside of the welding zone, the gap between the battery case and tab in the weld is also minimized. Besides, the limitation of the intensity and the power energy distribution of the laser Gaussian beam has caused significant changes in the morphology, mechanical, and electrical properties of the weld.

scholarly journals The Characteristics of Laser Welding of a Thin Aluminum Tab and Steel Battery Case for Lithium-Ion Battery

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 842 ◽  
Author(s):  
Lanh Ngoc Trinh ◽  
Dongkyoung Lee
Keyword(s):  
Laser Welding ◽  
Lithium Ion Battery ◽  
Electrical Resistance ◽  
Dissimilar Materials ◽  
Lithium Ion ◽  
Hardness Test ◽  
High Productivity ◽  
Mechanical And Electrical Properties ◽  
Pulsed Fiber Laser ◽  
Battery Case

During lithium-ion battery packing, joining between battery cases and tabs is challenging for manufacturers due to dissimilar materials of the battery case and the tab, as well as their thicknesses. Laser welding, which has proven to produce a good weld with high productivity and low electrical resistance, is introduced to weld these materials. The weld was conducted with nanosecond-pulsed fiber laser and the effect of laser powers on mechanical and electrical properties as well as microstructure of the joint is investigated. The weld bead at the low laser power exhibited several blowholes on the surface, while the formation of voids including centerline and root cavities was observed through the cross-section. Moreover, the phenomenon of upward penetration (UP) was observed in all laser powers and recoil pressure which was generated by metal evaporation was supposed to cause the formation of an upward flow of the lower material. A hardness test was performed on both horizontal and vertical directions through the fusion zone. Additionally, the increase of upward penetration (UP) resulted in higher strength and lower electrical resistance of the weld.

scholarly journals Research on molecular energy storage

2021 ◽  
Vol 1 (3) ◽  
pp. 49-56
Author(s):  
S.M. Zuyev ◽  
◽  
R.A. Maleyev ◽  
YU.M. Shmatkov ◽  
M.YU. Khandzhalov ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Energy Storage ◽  
Lithium Ion Battery ◽  
Double Layer ◽  
Lithium Ion ◽  
Storage Device ◽  
Energy Storage Device ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Advantages And Disadvantages

This article provides a comparative analysis of various energy storage devices. A detailed review and analysis of molecular energy storage units is carried out, their main characteristics and parame-ters, as well as their application areas, are determined. The main types of molecular energy storage are determined: electric double layer capacitors, pseudo capacitors, hybrid capacitors. Comparison of the characteristics of various batteries is given. The parameters of various energy storage devices are presented. The analysis of molecular energy storage devices and accumulators is carried out. Ttheir advantages and disadvantages are revealed. It has been shown that molecular energy storage or double layer electrochemical capacitors are ideal energy storage systems due to their high specific energy, fast charging and long life compared to conventional capacitors. The article presents oscillograms of a lithium-ion battery with a voltage of 10.8 V at a pulsed load current of 2A of a laptop with and without a molecular energy storage device, as well as oscil-lograms of a laptop with DVD lithium-ion battery with a voltage of 10.8 V with a parallel shutdown of a molecular energy storage device with a capacity of 7 F and without it. The comparative analysis shows that when the molecular energy storage unit with a 7 F capacity is switched on and off, transient processes are significantly improved and there are no supply voltage dips. The dependenc-es of the operating time of a 3.6 V 600 mAh lithium-ion battery at a load of 2 A for powering mo-bile cellular devices with and without a molecular energy storage are given. It is shown that when the molecular energy storage device is switched on, the battery operation time increases by almost 20%.

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 Preparation and Assembly of Battery Materials of High Performance Lithium Metal

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Jin Zhou
Keyword(s):  
Lithium Ion Battery ◽  
High Performance ◽  
Lithium Ion ◽  
Metal Composite ◽  
Lithium Metal ◽  
Battery Materials ◽  
Advantages And Disadvantages ◽  
Working Principle ◽  
Lithium Metal Battery ◽  
Faster Development

Lithium metal battery plays an important role in the field of battery. The preparation and assembly of lithium metal battery materials also play an important role in lithium metal batteries. Through the introduction of the working principle of lithium-ion battery, the positive material, negative material and electrolyte in the structure of lithium-ion battery are analyzed. After describing the types, advantages and disadvantages of battery materials, the preparation method of lithium metal composite electrode, the assembly of button battery and the electrochemical test are discussed. Under the premise of doing a good job at present, it is essential to go on better and faster development and innovation.

Optimization of Welding Conditions for Sealing of Lithium-Ion Battery by Pulsed Nd:YAG Laser

2008 ◽  
Vol 580-582 ◽  
pp. 523-526 ◽  
Author(s):  
Jong Do Kim ◽  
Seung Jo Yoo ◽  
Jang Soo Kim
Keyword(s):  
Lithium Ion Battery ◽  
Nd:Yag Laser ◽  
Lithium Ion ◽  
Industrial Applications ◽  
Contact Length ◽  
Weld Bead ◽  
Laser Material Processing ◽  
Pulsed Nd:Yag Laser ◽  
Solution Methods ◽  
Battery Case

Laser material processing is a very rapidly advancing technology for various industrial applications, because of its many advantages. A few of its major advantages, less yet better controlled heat input, have been successfully exploited for the very critical application of aluminum alloy welding. This study suggested the source of weld-defects and its solution methods in welding a lithium ion battery with pulsed Nd:YAG laser. In the experiment, battery case has changed over joint geometry from side welding to flat welding. In the case of an electrolyte inlet seal welding, welding was carried out after pressing an Al ball and the degree of eccentricity, the contact length and the gap are presented as major parameters. With the Al ball indent improvement, the eccentricity and the gap were reduced and the contact length was increased. As a result of an experiment, a sound weld bead shape and crack-free weld bead were obtained.

Sign in / Sign up

Export Citation Format

Share Document