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An Existence Theorem for a Model of Temperature Within a Lithium-Ion Battery

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arxiv 2406.02786 v1 pith:YLYRHR4O submitted 2024-06-04 math.AP

classification math.AP
keywords temperaturebatteryelectriclithium-ionmodeldifficultyequationexistence
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In this article we investigate a model for the temperature within a Lithium-Ion battery. The model takes the form of a parabolic PDE for the temperature coupled with two elliptic PDE's for the electric potential within the solid and electrolyte phases. The primary difficulty comes from the coupling term, which is given by the Butler-Volmer equation. It features an exponential nonlinearity of both the electric potentials and the reciprocal of the temperature. Another difficulty arising in the temperature equation are the gradients of the electric potentials squared showing up on the right-hand side. Due to the nonlinearity, meaningful estimates for the temperature are currently not known. In spite of this, our investigation reveals the local existence of continuous temperature for the Lithium-Ion Battery.

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  1. Optimal convergence in finite element semi-discrete error analysis of the Doyle-Fuller-Newman model beyond 1D with a novel projection operator

    math.NA 2024-11 conditional novelty 6.0 of 10

    Optimal O(h+(Δr)^2) finite element convergence for the Doyle-Fuller-Newman battery model in dimensions N=2,3 is established with a new projection operator and verified numerically.

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