Fast Charging at Cold Conditions—Model-Based Control Enabled by Multi-Scale Multi-Domain Plant Model 2022-01-0702
Fast charging of batteries at cold conditions faces the challenge of promoting undesired cell degradation phenomena such as lithium plating. The occurrence of lithium plating is strongly related to local surface potentials and temperatures involving the scales of the electrode surface, the unit cell and the entire module or pack. A multi-scale, multi-domain model is presented, enhancing a Newman based unit cell model with consistent models for heat generation and lithium plating and integrating this 1D+1D approach into a thermal 3D model on module level. The basic equations are presented and three different plating models from literature are discussed. The thermal model is assessed in open-loop simulations and the different plating approaches are compared in charge/discharge simulations at different operating conditions. The full multi-scale, multi-domain model is applied as a virtual sensor for model-based control of fast charging at cold conditions. The virtually given anode surface potential supports maximizing charge rates while keeping the risk of lithium plating under control.
Citation: Wurzenberger, J., Lechner, C., Jelovic, M., Mele, I. et al., "Fast Charging at Cold Conditions—Model-Based Control Enabled by Multi-Scale Multi-Domain Plant Model," SAE Technical Paper 2022-01-0702, 2022, https://doi.org/10.4271/2022-01-0702. Download Citation
Author(s):
Johann C. Wurzenberger, Christoph Lechner, Mario Jelovic, Igor Mele, Tomaz Katrasnik
Affiliated:
AVL LIST GmbH, AVL-AST d.o.o., University of Ljubljana
Pages: 17
Event:
WCX SAE World Congress Experience
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Scale models
Plating
Lithium
Vehicle charging
Batteries
Sensors and actuators
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »