Volume 8, Issue 2 1900118
Full Paper

The Effects of Mechanical and Thermal Loads during Lithium-Ion Pouch Cell Formation and Their Impacts on Process Time

Heiner Hans Heimes

Heiner Hans Heimes

Production Engineering of E-Mobility Components, RWTH Aachen University, Campus Boulevard 30, 52072 Aachen, Germany

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Christian Offermanns

Corresponding Author

Christian Offermanns

Production Engineering of E-Mobility Components, RWTH Aachen University, Campus Boulevard 30, 52072 Aachen, Germany

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Ahmad Mohsseni

Ahmad Mohsseni

Production Engineering of E-Mobility Components, RWTH Aachen University, Campus Boulevard 30, 52072 Aachen, Germany

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Hendrik Laufen

Hendrik Laufen

Production Engineering of E-Mobility Components, RWTH Aachen University, Campus Boulevard 30, 52072 Aachen, Germany

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Uwe Westerhoff

Uwe Westerhoff

Institute for High Voltage Technology and Electrical Power Systems, Technische Universität Braunschweig, Schleinitzstraße 23, 38106 Braunschweig, Germany

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Louisa Hoffmann

Louisa Hoffmann

Institute for High Voltage Technology and Electrical Power Systems, Technische Universität Braunschweig, Schleinitzstraße 23, 38106 Braunschweig, Germany

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Philip Niehoff

Philip Niehoff

MEET – Münster Electrochemical Energy Technology, University of Münster, Corrensstraße 46, 48149 Münster, Germany

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Michael Kurrat

Michael Kurrat

Institute for High Voltage Technology and Electrical Power Systems, Technische Universität Braunschweig, Schleinitzstraße 23, 38106 Braunschweig, Germany

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Martin Winter

Martin Winter

MEET – Münster Electrochemical Energy Technology, University of Münster, Corrensstraße 46, 48149 Münster, Germany

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Achim Kampker

Achim Kampker

Production Engineering of E-Mobility Components, RWTH Aachen University, Campus Boulevard 30, 52072 Aachen, Germany

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First published: 05 April 2019
Citations: 24

Abstract

The most cost-intensive components of the battery system for electric vehicles are the lithium-ion battery cells. Thus, to reduce the overall cost of a battery system, a clear objective is to reduce the production cost of lithium-ion battery cells. Cost drivers are to be identified, which are essential to enable potentials for cost reduction. In particular, the formation and aging process represents a high potential for process cost reduction because of its enormous process time expenditure. The automotive industry requires up to 3 weeks for the formation and aging process of a single lithium-ion battery cell. Due to the high relevance of these processes, the research project OptiZellForm as part of the ProZell Cluster examines those production steps in detail. Environmental conditions such as mechanical load and elevated temperature as well as the electrical and chemical properties influencing the formation and aging process are investigated. The focus of this study is the investigation of the mechanical exertion and elevated temperature with regard to the reduction of the formation process duration and thus the reduction of the production cost. For this reason, a specially designed device is used to investigate these parameters for lithium-ion battery cells.

Conflict of Interest

The authors declare no conflict of interest.

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