https://repository.usta.edu.co/handle/11634/30889

Rodríguez, Camilo Alejandro Corchuelo; Mosquera, Cristian Alexander Vega; Paez, Luz Marina

doi:10.15332/dt.inv.2020.01639

Cited by 2 publications

(2 citation statements)

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“…To minimize the RMSE of up to 0.0001 V while at the same time keeping minimal the number of parameters in the model, the excess Gibbs free energy is expanded with 30 th -order R-K polynomials, i.e., n = 30. The second model is the Monotonic R-K shown as the dotted blue line in Figure 3 where, in addition to the regular R-K model, monotony of the fitted OCV curve is enforced by adding the constraints, 33 U(x i ) ≤ U(x i+1 ), where x i < x i+1 . The constraints ensure the fitted OCV curve is monotonic with respect to SOC within the fitted range, thus respecting the second law of thermodynamics.…”

Section: T Pmentioning

confidence: 99%

Open-Circuit Voltage Models Should Be Thermodynamically Consistent

Yao,

Viswanathan

2024

J. Phys. Chem. Lett.

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Open-circuit voltage (OCV) models as a function of state-ofcharge (SOC) are fundamental to modeling the performance of batteries. The second law of thermodynamics enforces that the OCV should be monotonic with respect to the SOC. In this Perspective, we first review some of the currently popular empirical OCV fitting methods which compromise thermodynamics for the flexibility of empirical fitting. We propose a simple thermodynamically consistent OCV model enabled by differentiable thermodynamic modeling, which obeys the second law of thermodynamics. We cast the common-tangent condition derived from the second law of thermodynamics as a fixed-point solving problem and use implicit function theorem to enable efficient gradient-based parameters optimization. We demonstrate this on the OCV of 12 popular electrode materials, and this is integrated with open-source battery modeling software PyBaMM. We perform pseudo-2D discharge simulations to show the seamless integration of the above OCV models with battery modeling software. Given the simplicity of integration and implementation, we believe that thermodynamically consistent OCV models should be a requirement for future Li-ion battery models.

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Section: T Pmentioning

confidence: 99%

Open-Circuit Voltage Models Should Be Thermodynamically Consistent

Yao,

Viswanathan

2024

J. Phys. Chem. Lett.

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“…The distance to installation is assumed in 30 km by lorry as a study carried out by Tähkämö et al (Tähkämö et al, 2013). Whereas, the transport distances for final disposal were estimated considering a collection and sorting management of lighting products by the Ambilamp association located in Spain (Ambilamp, 2020). In this sense, it was estimated at 60 km to the waste sorting facility and 80 km from the sorting facility to the treatment facility.…”

Section: Lca Of Linear Led Luminaires 31 Goal and Scope Definitionmentioning

confidence: 99%