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Lithium deposition prediction method and device of lithium ion battery

A lithium-ion battery and lithium deposition technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problem of low prediction accuracy of lithium deposition, and achieve the effect of improving accuracy and accuracy

Active Publication Date: 2019-06-28
广东萨菲安新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a lithium deposition prediction method and device for lithium ion batteries, to alleviate the technical problem that the existing lithium deposition prediction methods for lithium ion batteries have low prediction accuracy for lithium deposition

Method used

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  • Lithium deposition prediction method and device of lithium ion battery
  • Lithium deposition prediction method and device of lithium ion battery
  • Lithium deposition prediction method and device of lithium ion battery

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Embodiment 1

[0026] According to an embodiment of the present invention, a method for predicting lithium deposition in a lithium ion battery is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and Although the logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than here.

[0027] figure 1 It is a flowchart of a method for predicting lithium deposition of a lithium ion battery according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0028] Step S102, based on acquiring physical and chemical parameters of the lithium-ion battery to be tested during the charging process and size data of the lithium-ion battery to be tested;

[0029] Because it is difficult for traditional experimental methods to quantitatively analyze the lithiu...

Embodiment 2

[0126] The present invention also provides a lithium deposition prediction device for lithium ion batteries, which is used to implement the lithium deposition prediction method for lithium ion batteries provided in the above-mentioned embodiments of the present invention. The following is the lithium ion battery provided by the embodiments of the present invention The specific introduction of the lithium deposition prediction device.

[0127] Such as image 3 Said, the device includes: an acquisition unit, a modeling unit, a coupling unit, a calculation unit and a prediction unit, wherein,

[0128] The acquiring unit 10 is configured to acquire the physical and chemical parameters of the lithium ion battery to be tested during the charging process and the size data of the lithium ion battery to be tested;

[0129] The modeling unit 20 is configured to construct a three-dimensional electrochemical model of the lithium ion battery to be tested and a three-dimensional thermal model of t...

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Abstract

The invention provides a lithium deposition prediction method and device of a lithium ion battery, and relates to the technical field of lithium ion batteries. The method comprises that physical and chemical parameters and size data of the lithium ion battery to be detected are obtained; a 3D electrochemical model and a 3D thermal model of the lithium ion battery to be detected are established according to the physical and chemical parameters and size data; the D electrochemical model is coupled to the 3D thermal model to obtain an electrochemical thermal coupling model; the physical and chemical parameters are input to the electrochemical thermal coupling model to calculate a target parameter of the lithium ion battery to be detected; and on the basis of the target parameter, a lithium deposition result of the lithium ion battery to be detected is predicted. The technical problem that the prediction precision for the lithium deposition phenomenon of the lithium battery in the chargingprocess is relatively low at present is solved.

Description

Technical field [0001] The present invention relates to the technical field of lithium ion batteries, in particular to a method and device for lithium deposition prediction of lithium ion batteries. Background technique [0002] When a lithium ion battery is charged at a high rate or at a low temperature, it is easy to cause metal lithium to deposit and form dendrites, causing safety problems. Because the lithium-ion battery is a closed system, it is difficult to perform real-time and quantitative characterization of the small changes that occur during the working process through experimental methods. Numerical simulation technology has become an effective method for studying such closed systems. On the basis of establishing an electrochemical model, introducing a mathematical equation that triggers the deposition of metallic lithium is the main method used by researchers in this field. [0003] Because traditional experimental methods are difficult to quantitatively analyze the ...

Claims

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Application Information

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IPC IPC(8): G01R31/387G01R31/367G01R31/378G01R31/385
Inventor 汤依伟
Owner 广东萨菲安新材料有限公司
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