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Method for Monitoring Swelling of Lithium-Ion Batteries

A lithium-ion battery, expansion pressure technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the impact of lithium-ion battery safety issues, affecting the battery cycle life and other issues

Active Publication Date: 2016-12-14
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After long-term research, it has been found that lithium-ion batteries may expand during use, and the expansion problem will have a greater impact on the safety of lithium-ion batteries, and will also affect the cycle life of the battery cell

Method used

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  • Method for Monitoring Swelling of Lithium-Ion Batteries
  • Method for Monitoring Swelling of Lithium-Ion Batteries
  • Method for Monitoring Swelling of Lithium-Ion Batteries

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Embodiment Construction

[0047] The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0048] Embodiments of the present application provide a method for monitoring lithium-ion battery expansion, such as figure 1 shown, including the following steps:

[0049] Step 10: monitoring the change of the force applied to the outside by the cell shell of the lithium-ion battery due to expansion and the force change of the gas inside the cell shell;

[0050] Step 20: Analyzing the change of the applied force of the battery case to the outside due to expansion and the change of the force of the internal gas to obtain the change of the applied force to the battery case due to the electrode expansion.

[0051] According to the applicant's analysis, according to the principle of force balance, the change of the force applied to the outside due to the expansion of the cell shell is equal to the internal expansion pressure ...

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PUM

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Abstract

The invention relates to the field of clean energy and concretely relates to a method for monitoring lithium ion battery expansion. The method comprises the following steps of monitoring the cell housing expansion-caused change of a lithium ion battery cell housing force applied to the environment and the change of stress on gas in a lithium ion battery cell housing, and analyzing the cell housing expansion-caused change of a lithium ion battery cell housing force applied to the environment and the change of stress on the inner gas so that electrode expansion-caused change of a force to the cell housing is determined. The method for monitoring lithium ion battery expansion can acquire cell housing expansion-caused change of a lithium ion battery cell housing force applied to the environment and the change of stress on gas in a lithium ion battery cell housing and accurately characterize an electrode expansion degree of a lithium ion battery in use by the above change data.

Description

technical field [0001] The present application relates to the field of clean energy, in particular, to a method for monitoring the expansion of lithium-ion batteries. Background technique [0002] Since the commercialization of lithium-ion batteries, lithium-ion batteries have rapidly become popular in portable mobile power supplies, mobile phones, Notebook computers, cameras and other portable electronic products continue to expand and promote applications. With the depletion of petrochemical energy and the intensification of pollution around the world, people's calls for clean energy are getting higher and higher, which makes lithium-ion batteries quickly occupy the important position of petrochemical energy. [0003] After long-term research, it has been found that lithium-ion batteries may swell during use, and the expansion problem will have a greater impact on the safety of lithium-ion batteries, and will also affect the cycle life of the battery. [0004] Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 曹福彪金海族魏西洁杨同欢郭小烛
Owner CONTEMPORARY AMPEREX TECH CO