A method for the fast estimation of a battery entropy-variation high-resolution curve – Application on a commercial LiFePO4/graphite cell
| Autor: | Guy Friedrich, Christophe Forgez, Marie-Pierre Bichat, Nicolas Damay |
|---|---|
| Přispěvatelé: | Roberval (Roberval), Université de Technologie de Compiègne (UTC) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Nuclear engineering
Energy Engineering and Power Technology Thermodynamics High resolution Entropy Variation 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Batteries [SPI]Engineering Sciences [physics] Electroanalytical method Graphite Electrical and Electronic Engineering Physical and Theoretical Chemistry Entropy (energy dispersal) Renewable Energy Sustainability and the Environment Chemistry [SPI.NRJ]Engineering Sciences [physics]/Electric power 021001 nanoscience & nanotechnology [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation 0104 chemical sciences State of charge Heat Generation Heat generation Thermal Model Inversion Thermal model 0210 nano-technology |
| Zdroj: | Journal of Power Sources Journal of Power Sources, Elsevier, 2016, 332, pp.149-153 |
| ISSN: | 0378-7753 1873-2755 |
| Popis: | International audience; The entropy-variation of a battery is responsible for heat generation or consumption during operation and its prior measurement is mandatory for developing a thermal model. It is generally done through the potentiometric method which is considered as a reference. However, it requires several days or weeks to get a look-up table with a 5 or 10 % SoC (State of Charge) resolution. In this study, a calorimetric method based on the inversion of a thermal model is proposed for the fast estimation of a nearly continuous curve of entropy-variation. This is achieved by separating the heats produced while charging and discharging the battery. The entropy-variation is then deduced from the extracted entropic heat. The proposed method is validated by comparing the results obtained with several current rates to measurements made with the potentiometric method. |
| Databáze: | OpenAIRE |
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