Lithium battery safety valve opening pressure finite element modeling method

A technology of safety valve opening and modeling method, which is applied in the field of finite element modeling to analyze the opening pressure of lithium battery safety valve, and achieves the effect of reducing the cost of trial production and experiment and filling the technical gap.

Active Publication Date: 2018-06-01
CHINA AVIATION LITHIUM BATTERY RES INST CO LTD +1
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AI Technical Summary

Problems solved by technology

At present, there is no publicly reported literature in the lithium battery industry to introduce how to use simulation methods to predict the opening pressure of existing structures, and it is impossible to reveal the deformation and failure mechanisms of structures from the perspective of theory and simulation.

Method used

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  • Lithium battery safety valve opening pressure finite element modeling method
  • Lithium battery safety valve opening pressure finite element modeling method
  • Lithium battery safety valve opening pressure finite element modeling method

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Embodiment Construction

[0045]The present invention will be described in detail in conjunction with accompanying drawing now. This figure is a simplified schematic diagram only illustrating the basic structure of the present invention in a schematic manner, so it only shows the components relevant to the present invention.

[0046] Such as Figure 1-Figure 7 As shown, a finite element modeling method for the opening pressure of a lithium battery safety valve of the present invention comprises the following steps:

[0047] Step 1: Creation and delivery of parametric geometric models, including,

[0048] Step 1.1: Determine the characteristic parameters of the product, the characteristic parameters include thickness, length, outer diameter, inner diameter and notch depth, use each characteristic parameter as input, and use CATIA three-dimensional modeling software to establish a parameterized lithium battery safety valve Three-dimensional solid model; among them, the notch depth is a key parameter th...

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Abstract

The present invention provides a lithium battery safety valve opening pressure finite element modeling method, belonging to the technical field of lithium battery safety valve performance analysis. The lithium battery safety valve opening pressure finite element modeling method is especially used for simulation analysis of intensity of a lithium battery safety valve, and the intensity is taken asan index to identify a condition of opening event generation of the safety valve to replace an experiment so as to rapidly determine the opening pressure of the safety valve. The lithium battery safety valve opening pressure finite element modeling method can help structure designers with rapid pre-determination and response for rationality of the model design at an initial phase of the design, asimulation result is not influenced by consistence of actual produced products, and the deviation of the actual indexes of the products and design values can be identified to perform manage and control of key feature indexes of the lithium battery safety valve.

Description

technical field [0001] The invention relates to a finite element modeling method for analyzing the opening pressure of a lithium battery safety valve. Background technique [0002] The safety valve is a battery pressure relief device with a notch structure on the structure, which is a structure that induces deformation. When the internal pressure of the battery is out of control and abnormally increases to a certain extent, the safety valve will explode to release the pressure, so as to prevent explosion accidents caused by continuous pressurization of the battery. At present, there is no publicly reported literature in the lithium battery industry to introduce how to use simulation methods to predict the cracking pressure of existing structures, and it is impossible to reveal the deformation and failure mechanisms of structures from the perspective of theory and simulation. Contents of the invention [0003] The technical problem to be solved by the present invention is:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06F17/50
CPCG06T17/20G06F30/23
Inventor 张炜李有明孙楷航马丽王翔李靖李振
Owner CHINA AVIATION LITHIUM BATTERY RES INST CO LTD
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