Efficiency Characterization In Lithium-Ion Batteries

James Kahng

School Name

Governor's School for Science and Math

Grade Level

12th Grade

Presentation Topic

Engineering

Presentation Type

Mentored

Mentor

Mentor: Dr. Onori; Department of Automotive Engineering, Clemson University

Abstract

Lithium-ion batteries have been widely used since its introduction in 1990’s due to its high energy and power density, wide operating temperature range, and lack of memory effect. They are used in many portable electronics applications such as phones and laptops. Automotive companies have been developing hybrid, plug-in hybrid, and fully electric vehicles using lithium-ion batteries recently because of the declining amount of oil reserves to power conventional combustion engines, and the advantages that this battery technology offers. However, the electrification of vehicles is more expensive compared to internal combustion engine-powered cars due to the high price of lithium-ion batteries. In addition, lithium-ion batteries age due to usage and time, which degrade their performance. Because of the high initial costs, automotive companies must have a clear understanding of the performance of lithium-ion batteries in order to reduce maintenance costs and foresee the life expectancy of the battery. The efficiency characterization in lithium-ion battery cells were analyzed using MATLAB to extract data from the aging experiments of cells. The experiments were conducted using an Arbin BT-2000 tester and Peltier junctions to create different battery usage patterns, such as different operating temperatures and charge/discharge rates. This data was used to measure the battery efficiency as the batteries aged. The understanding and correlation of aging of lithium-ion cells on its energy efficiency will provide automotive manufacturers a better understanding of the characteristics of the battery under usage.

Location

Owens G07

Start Date

4-16-2016 11:00 AM

COinS
 
Apr 16th, 11:00 AM

Efficiency Characterization In Lithium-Ion Batteries

Owens G07

Lithium-ion batteries have been widely used since its introduction in 1990’s due to its high energy and power density, wide operating temperature range, and lack of memory effect. They are used in many portable electronics applications such as phones and laptops. Automotive companies have been developing hybrid, plug-in hybrid, and fully electric vehicles using lithium-ion batteries recently because of the declining amount of oil reserves to power conventional combustion engines, and the advantages that this battery technology offers. However, the electrification of vehicles is more expensive compared to internal combustion engine-powered cars due to the high price of lithium-ion batteries. In addition, lithium-ion batteries age due to usage and time, which degrade their performance. Because of the high initial costs, automotive companies must have a clear understanding of the performance of lithium-ion batteries in order to reduce maintenance costs and foresee the life expectancy of the battery. The efficiency characterization in lithium-ion battery cells were analyzed using MATLAB to extract data from the aging experiments of cells. The experiments were conducted using an Arbin BT-2000 tester and Peltier junctions to create different battery usage patterns, such as different operating temperatures and charge/discharge rates. This data was used to measure the battery efficiency as the batteries aged. The understanding and correlation of aging of lithium-ion cells on its energy efficiency will provide automotive manufacturers a better understanding of the characteristics of the battery under usage.