30 credits - Influence of swelling on electrochemical performance of Li-ion battery cells

30 credits - Influence of swelling on electrochemical performance of Li-ion battery cells

Thesis project at Scania is an excellent way of making contacts for your future working life. Many of our current employees started their career with a thesis project.

Background:
Electrified vehicles (hybrid or fully electric) rely on one or several Li-ion battery packs for partial or total propulsion. A battery pack is usually composed of several battery modules, which in turn are composed of several battery cells. From a testing perspective, the most suitable device to be tested is the battery cell. Nevertheless, battery cell testing gives mostly qualitative information and the results are difficult to quantify on module and pack level. Swelling of the Li-ion battery cells is one factor that contributes to this difficulty.

A Li-ion battery cell swells during charging. Most of the swelling is reversible upon discharging, but a certain irreversibility is observed with electrochemical aging of such a battery cell. The irreversible swelling of the cells will negatively affect the life-length of the battery. Therefore, there is a need for understanding the influence of swelling on the electrochemical performance of battery cells.

Target:
The goal is to investigate the influence of swelling and external pressure on the electrochemical aging of Li-ion battery cells and to quantify cell testing at module and pack level.

Assignment:
The candidate will work in collaboration with Scania R&D engineers in Södertälje. The work will include building a rig that simulates a battery cell in a battery module environment and evaluating the electrochemical behavior depending on the position of the battery cell in the rig. The candidate will compare the results to battery module tests.

Education:
  • M.Sc. student mechanical, electrical or electrochemical engineering
  • interest in laboratory work
  • interest in batteries and electrified vehicles
  • good communications skills in English
  • Number of students: 1Start date: January 2019Estimated time needed: 6 Months
Contact persons and supervisors:
Gabriel Oltean, development engineer, Battery Cell Development, gabriel.oltean@scania.com, 08 553 52 951

Verena Löfqvist Klass, manager, Battery Cell Development, verena.klass@scania.com, 08 553 89 174

Your application should contain a cover letter, CV and transcripts.
Selections will be made throughout the application period.
Mer info
Område Södertälje
Yrkesroll Teknik & Ingenjör
Typ av anställning Heltid, Tillsvidareanställd
Hemsida http://www.scania.com
Sista ansökningsdag 30 nov (9 dagar kvar)

Om arbetsgivaren

Scania is a world-leading provider of transport solutions. Together with our partners and customers we are driving the shift towards a sustainable transport system. In 2017, we delivered 82 500 trucks, 8 300 buses as well as 8 500 industrial and marine engines to our customers. Net sales totalled nearly SEK 120 billion, of which about 20 percent were services-related. Founded in 1891, Scania now operates in more than 100 countries and employs some 49 000 people. Research and development are concentrated in Sweden, with branches in Brazil and India. Production takes place in Europe, Latin America and Asia, with regional production centres in Africa, Asia and Eurasia. Scania is part of Traton Group. For more information visit www.scania.com.