What happens in the lithium ion batteries when used in Automotive Applications?

Evelina Wiknerevelina.wikner@chalmers.seDepartment of Electrical EngineeringDivision of Electric Power EngineeringChalmers University of Technology

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• Background• How a Li-ion battery works• Aging mechanisms• Aging testing• Conclusions

Outline

Photo: Volvo

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• 1888: First EV• 1900: 90% of New York taxis

Electric.• 1915: Starts to be out competed

by the combustion vehicles.• …• 1971: EV on the moon• 2015: 15962 EVs in Sweden• 2016: 28113 EVs in Sweden

History of the Electric Vehicle (EV)

[Availiable 2017-05-16] http://hyraelbil.com/elbilens-historia/

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Pouch Cell Cylindrical Cell Prismatic Cell

https://chem.libretexts.org/Textbook_Maps/General_Chemistry_Textbook_Maps/Map%3A_Chem1_(Lower)/24%3A_Electrochemistry/24.6%3A_Batteries_and_Fuel_Cells

http://batteryuniversity.com/learn/article/types_of_battery_cells

http://www.autonews.com/article/20131021/OEM06/310219870/panasonic-to-increase-its-battery-capacity

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EXEMPELBILD

How a Li-ion Battery works

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Aging Mechanisms

Anode: Cathode:

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Temperature:

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Fast Charging:

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SOC level:

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SOC level:

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• High temperature is accelerating the aging.• Fast charging is accelerating the aging.• The SOC level effects the aging.

Conclusions

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Thank you for your attention!