Digital Twin in Battery Production 4.0 - From Data Management and Traceability System to Target-Oriented Application
Presentation held at International Battery Production Conference 2021, Braunschweig, 1st November 2021
The advancing climate change necessitates a shift from the use of conventional energy sources to renewable ones, which is accompanied by the indispensability of efficient storage of electrical energy. This is resulting in a boom in demand for battery cells - according to estimates, the market for lithium-ion battery cells will grow from around 200 GWh per year in 2020 to over 2,000 GWh by 2030. However, the production of battery cells involves enormous complexity for companies and entails various hurdles. Here, cell quality proves to be a central challenge. One possible answer to this problem lies in the digitalization and networking of production associated with the fourth industrial revolution, which holds great potential for improving quality in battery cell production 4.0. In this context, the collection and useful processing of data that already is generated in large quantities in the production environment is essential. However, the generated data is often heterogeneous and a unique assignment to the produced object is rarely possible, which complicates a target-oriented use of data. In this presentation, we propose the conceptualization of a digital twin in battery cell production, taking into account the different phases of its creation. Required data describing the battery cell is initially identified by using a methodology for integrating process knowledge from different areas of expertise. Data aggregation across the various production processes can be accomplished with the help of a suitable and tailor-made traceability system. Based on the aggregated data, the derivation of a digital twin of the battery cells is made possible. The use of the digital twin is in turn realized through algorithm-based modeling, on the basis of which conclusions can be derived about the real-world equivalent. This procedure is being evaluated in the context of a battery cell production environment.