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MPC strategies based on the equivalent hydraulic model for the fast charge of commercial Li-ion batteries.
- Source :
-
Computers & Chemical Engineering . Oct2020, Vol. 141, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- In this work, we propose and demonstrate two low-computational MPC-based strategies to charge low-capacity commercial Li-ion batteries in the shortest time possible, while limiting the occurrence of degradation mechanisms. To do so, we use a low-complexity electrochemical model (the Equivalent Hydraulic Model, EHM). To reduce the computational burden of the resulting non-convex optimization problem, two approximations of the admissible region are considered: a time-invariant convexification, and a time-varying convex embedding. These approximations are experimentally tested on commercial LCO batteries (Turnigy 160mAh), under controlled ambient temperatures (10, 20, and 30 ∘C) and a non-controlled scenario. They are compared with the Constant Current-Constant Voltage (CCCV) protocol. Experimental results show that the proposed schemes achieve relevant reductions of the charging time with respect to the CCCV in thermal non-controlled and controlled environments. Results also highlight that the time-varying convex embedding does not significantly impact the computational time while further reducing the charging time. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDRAULIC models
*LITHIUM-ion batteries
*ELECTRIC vehicle charging stations
Subjects
Details
- Language :
- English
- ISSN :
- 00981354
- Volume :
- 141
- Database :
- Academic Search Index
- Journal :
- Computers & Chemical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 145475111
- Full Text :
- https://doi.org/10.1016/j.compchemeng.2020.107010