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Lithium-ion battery and package detection method thereof

A technology for lithium-ion batteries and battery casings, which is applied to secondary batteries. By detecting the appearance of fluids at leakage points, circuits, etc., it can solve problems such as low precision and missed judgments, and achieve low precision and good application prospects. Effect

Inactive Publication Date: 2017-05-10
TIANJIN SINOPOLY NEW ENERGY TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of low accuracy and prone to missed judgments in the detection method of lithium-ion battery packaging and sealing in the prior art, and to provide a lithium-ion battery that does not damage the battery structure and has high leak detection accuracy. Battery and packaging testing method

Method used

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  • Lithium-ion battery and package detection method thereof
  • Lithium-ion battery and package detection method thereof
  • Lithium-ion battery and package detection method thereof

Examples

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Effect test

Embodiment 1

[0040] Such as Figure 1~3 As shown, this embodiment provides a lithium ion battery, including a battery case 1 and a core pack 2 disposed inside the battery case 1 . The battery casing 1 is square and is made of conventional aluminum-plastic film in the field; the core package 2 is flat and includes conventional battery structures such as positive electrode sheets, negative electrode sheets, and diaphragms, and is drawn out from the core package 2. The tabs 3 (including positive tabs and negative tabs) are located on the outside of the battery case 1 and are electrically connected to the positive and negative tabs in the core pack 2 respectively; inside the battery case 1 there are also Airbag 4, the airbag 4 is arranged below the tab 3 and is located on the side of the battery case 1 close to the sealing port. The airbag 4 contains the gas to be tested; the shape of the airbag 4 in this embodiment is elongated , the material is PE, and the gas to be tested is nitrogen.

[...

Embodiment 2

[0050] The main structure of the lithium ion battery of this embodiment is the same as that of Embodiment 1, the difference is:

[0051] Such as Figure 6-8As shown, in this embodiment, the airbag 4 is located on the side vertical to the sealing port in the battery case 1; the number of the airbag 4 is three, and the airbag 4 shares a sealing edge 6 so as to be arranged on the same side of the core pack ; Each airbag 4 includes a rupture opening 5 , and the rupture opening 5 is located in the middle of the airbag 4 .

[0052] The encapsulation method and the encapsulation inspection method of this embodiment are the same as those in Embodiment 1.

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Abstract

The invention discloses a lithium-ion battery and a package detection method thereof. The lithium-ion battery comprises a battery shell and a cell packet arranged in the battery shell, wherein the cell packet comprises a positive electrode piece, a negative electrode piece, a diaphragm and electrode tabs which are electrically connected with the electrode pieces; an airbag is further arranged in the battery shell; detected gas is stored in the airbag; the detected gas is gas which does not react with substances in the battery. According to the lithium-ion battery, the detected gas is packaged in the battery through utilizing an airbag structure, and the airbag is broken through additional pressure; the escaped detected gas is directly detected so that the aim of checking the packaging effect of the battery is realized; the defects of an existing lithium-ion battery sealing performance detection method that the precision is low and missed judgment is easy to cause are overcome; the airbag structure also does not influence normal and safe utilization of the battery, does not cause a risk that the battery is expanded or exploded and has a good application prospect.

Description

technical field [0001] The invention relates to a lithium ion battery and a package detection method thereof. Background technique [0002] In recent years, with the popularity of mobile devices and the promotion of electric vehicles, the market demand for lithium-ion batteries has continued to increase. Lithium-ion battery is a secondary battery (rechargeable battery). It generally uses materials containing lithium elements as electrodes, and mainly relies on lithium ions to move between the positive and negative electrodes to work. It is a representative of modern high-performance batteries. According to the different electrolyte materials used in lithium-ion batteries, lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries. The positive and negative materials used in polymer lithium-ion batteries are the same as those of liquid lithium ions, and the working principles of the batteries are basically the same. The main differe...

Claims

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Application Information

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IPC IPC(8): H01M10/0525G01M3/20
CPCG01M3/20H01M10/0525Y02E60/10
Inventor 叶茂管风鑫纪红星刘峰
Owner TIANJIN SINOPOLY NEW ENERGY TECH
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