Lithium deposition prediction method and device for a lithium-ion battery

A lithium-ion battery and lithium deposition technology, which is applied in measurement devices, measurement of electricity, measurement of electric variables, etc., can solve the problems of low prediction accuracy of lithium deposition, and achieve the effect of improving precision and accuracy

Active Publication Date: 2021-02-23
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 for a lithium-ion battery
  • Lithium deposition prediction method and device for a lithium-ion battery
  • Lithium deposition prediction method and device for a lithium-ion battery

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Embodiment 1

[0026] According to an embodiment of the present invention, a lithium deposition prediction method for a lithium-ion battery is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and , although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0027] figure 1 It is a flow chart of a lithium deposition prediction method for 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 obtaining 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;

[0029] Due to the difficulty of real-time and quantitative analysis...

Embodiment 2

[0126] The present invention also provides a lithium-ion battery lithium deposition prediction device, which is used to implement the lithium-ion battery lithium deposition prediction method provided by the above-mentioned content of the embodiment of the present invention, the following is the lithium-ion battery provided by the embodiment 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 acquisition unit 10 is used to acquire the physicochemical 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 used to construct a three-dimensional electrochemical model of the lithium-ion battery to be tested and a three-dimensional thermal model of the lith...

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Abstract

The invention provides a method and device for predicting lithium deposition of a lithium ion battery, relating to the technical field of lithium ion batteries, including: obtaining 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 Constructing a three-dimensional electrochemical model of the lithium-ion battery to be tested and a three-dimensional thermal model of the lithium-ion battery to be tested based on the physicochemical parameters and the size data; coupling the three-dimensional electrochemical model and the three-dimensional thermal model, The electrochemical thermal coupling model is obtained; the physical and chemical parameters are input into the electrochemical thermal coupling model, and the target parameters of the lithium-ion battery to be tested are calculated; based on the target parameters, the lithium deposition result of the lithium-ion battery to be tested is predicted, which solves the current lithium-ion Technical problem of low prediction accuracy of lithium deposition phenomena during battery charging.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium deposition prediction method and device for 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. Since the lithium-ion battery is a closed system, it is difficult to perform real-time and quantitative characterization of the subtle changes in the working process through experimental methods. Numerical simulation technology has become an effective means to study this kind of closed system. Based on the establishment of electrochemical models, the introduction of mathematical equations to trigger metal lithium deposition is the main method adopted by researchers in this field. [0003] Due to the difficulty of real-time and quantitative analysis of lithium deposition in the battery charging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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