The invention discloses a sSimulation method for a three-dimensional simplified model of a lithium ion battery

Abstract

The invention relates to a simulation method based on a three-dimensional simplified model of a lithium ion battery, which comprises the following steps of: (1) selecting a commercial lithium ion softpackage battery, and establishing three-dimensional layered electrochemistry-electrochemistry of three sizes of the battery according to relevant parameters; A; a thermal coupling model: a model (OUM) of one cell, a model (TUM) of two cells, and a half-sized model (HSM); (2) respectively comparing the thermal behavior and the electrochemical property of the lithium ion battery under the three simulation methods; A; and (3) discussing whether a simulation method of a full-size model can be replaced by a simulation method of a unit model, and giving a basis. According to the method, t, the three-dimensional model simulation method of the lithium ion battery can be simplified, a simulation method based on a unit model is used for replacing a simulation method of a full-size model, t, the calculation time is saved, t, the model accuracy can be ensured, and a certain guidance basis is provided for simulation researchers.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery model building and simulation method simplification, and in particular relates to a simulation method based on a three-dimensional simplified model of a lithium-ion battery. Background technique [0002] In recent years, lithium-ion batteries have attracted more and more attention from researchers due to their excellent performance in terms of energy density, power density, cycle life, and environmental protection. The use of traditional experimental methods to study the performance of lithium-ion batteries has become increasingly mature, and many shortcomings in the experimental process, such as the inability to observe the internal properties of lithium-ion batteries, and the consumption of manpower, material and financial resources, and resources, have gradually become the focus of attention. This leads to further research on simulation. At present, there are generally two simulatio...

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Problems solved by technology

[0003] However, most researchers are committed to the coupling of the P2D electrochemical model and the three-dimensional thermal model, which is to couple the heat source calculated by the P2D electrochemical model into the thermal model of the battery as an average value, which is a coupling method of the average heat source. The heat sources of each part are not coupled into the thermal model in real time

Moreover, we all know that the interior of the soft-pack lithium-ion battery is a stacked structure. To establish a full-scale three-dimensional layered model requires a large amount of calculation and computing resources, which further restricts the development of lithium-ion battery models.

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