Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 43, Issue 9, Pages 4344-4358Publisher
WILEY-HINDAWI
DOI: 10.1002/er.4560
Keywords
battery charging; closed-form expression; Lagrange multiplier; minimization; thermal model
Categories
Funding
- EU [845102-HOEMEV-H2020-MSCA-IF-2018]
- National Natural Science Foundation of China [61763021, 61763021 51775063]
- Innovation Team Program of Kunming University of Science and Technology [14078368]
- National Key R&D Program of China [2018YFB0104000, 2018YFB0104900]
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Battery charging techniques are critical to enhance battery operation performance. Charging temperature rise, energy loss, and charging time are three key indicators to evaluate charging performance. It is imperative to decrease temperature rise and energy loss without extending the charging time during the charging process. To this end, an equivalent circuit electrical model, a power loss model, and a thermal model are built in this study for lithium-ion batteries. Then, an integrated objective function is formulated to minimize energy loss and temperature increment during battery charging. To further validate the generality and feasibility of the proposed charging strategy, experiments are conducted with respect to different current, operating temperatures, battery types, and aging status. Comparison results demonstrate that the devised charging strategy is capable of achieving the intended effect under any operating temperature and with different aging status.
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