Electrochemical behavior simulation of high specific energy power lithium-ion batteries based on numerical model
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ORIGINAL PAPER
Electrochemical behavior simulation of high specific energy power lithium-ion batteries based on numerical model Shui Tang 1 & Yu Liu 1 & Lixiang Li 1 & Ming Jia 1 & Liangxing Jiang 1 & Fangyang Liu 1 & Yan Ai 2 & Chunmei Yao 3 & Huijun Gu 3 Received: 19 October 2019 / Revised: 4 July 2020 / Accepted: 17 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Based on COMSOL Multiphysics, a three-dimensional electrochemical-thermal coupling model of lithium-ion battery is constructed. The electrochemical distribution characteristics of the electrode and its evolution law are studied. The results show that the solid-liquid potential shows a large gradient change at the junction between the positive and negative electrode and tabs; the distribution of the maximum and minimum values of the overpotential near the side of tabs or the center of the electrode and the absolute value of the negative distribution characteristic is relatively large. At the end of discharge, the negative electrode almost comes to the state of complete de-lithium, which causes the potential to increase suddenly, and the battery voltage to reach the discharge cut-off voltage in advance. The state of charge (SOC) of the positive electrode is only 0.89; the electrode utilization distribution exhibits a non-uniform distribution characteristic perpendicular to the thickness of the electrode, and changes continuously during the discharge process. Keywords Lithium-ion battery . Numerical simulation . Electrochemical behavior . Distribution characteristics
Introduction In recent years, the consumption of fossil fuel has accelerated, causing a sharp decline in the global reserves of fossil fuel and serious damage to the surrounding environment, due to the rapid development of industries in the world and the increasing demand for transportation. At the same time, countries have introduced ban regulations of fuel vehicles to promote the rapid development of new energy vehicles [1–3]. As the core of new energy vehicles, the development of power battery technology has received much attention, because it not only directly affects the acceptance of replacing traditional fuel vehicles but also may significantly change the energy Shui Tang and Yu Liu contributed equally to this work. * Ming Jia [email protected] 1
School of Metallurgy and Environment, Centre South University, Changsha 410083, China
2
Hunan Provincial Key Laboratory of All-Solid-State Energy Storage Materials and Devices, Hunan City University, Yiyang 413000, China
3
Hunan Huahui New Energy Co., Ltd, Yiyang 413000, China
landscape of the world. Exploring power batteries with higher energy density, safety and reliability have become an important issue for energy and power industry workers in all countries [4–6]. With the continuous advancement of numerical computing science and computing resources, numerical simulation technology has played a more significant role in research and development of advanced electrochemical energy storage [7–10].
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