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A kind of air tightness detection method

An air-tightness detection and air-tightness technology, which is used in liquid/vacuum measurement for liquid tightness, and by detecting the appearance of fluid at the leak point, to improve detection efficiency, simplify the inflation process, and prevent leak detection. Effect

Active Publication Date: 2022-02-25
HUNAN HONGYI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide an air tightness detection method for the existing welding air tightness problem

Method used

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  • A kind of air tightness detection method
  • A kind of air tightness detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] see figure 1 and figure 2, put the PP airbag 3 filled with helium into the liquid injection port 2 of the square lithium battery cover plate 1, the liquid injection hole 6 at the lower end is sealed with a rubber plug 5, and the upper end is sealed with an aluminum welding sheet 4, which is generated when the sealing is used. The heat of the airbag 3 is melted to release the helium, and then the square lithium battery cover 1 is detected in the special equipment to detect whether the helium exceeds the standard. If it is detected that the helium exceeds the standard, the airtightness of the welding seal is not good. If the excess helium is not detected, insert the rubber plug 5 with a needle to form a gap, vacuumize the square lithium battery cover plate 1 in a special device and check again whether there is excessive helium, if it is detected that the helium exceeds the standard, weld The airtightness of the seal is good. If the helium gas is not detected to exceed ...

Embodiment 2

[0048] see figure 1 with figure 2 Put the airbag 3 filled with helium into the liquid injection port 2 of the square lithium battery cover plate 1, the liquid injection hole 6 at the lower end is sealed with a rubber plug 5, and the airbag is crushed by using a repair welding piece 4 designed with an acute angle at the upper end 3. Then weld and seal, use the sharp angle to puncture the airbag and release the helium, and then put the square lithium battery cover 1 in the special equipment to detect whether there is excessive helium. If it is detected that the helium exceeds the standard, the airtightness of the welding seal is not good. If the excess helium is not detected, insert the rubber plug 5 with a needle to form a gap, vacuumize the square lithium battery cover plate 1 in a special device and check again whether there is excessive helium, if it is detected that the helium exceeds the standard, weld The airtightness of the seal is good. If the helium gas is not detec...

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Abstract

The invention provides an air tightness detection method, comprising: S1, sealing one end of the through hole of the workpiece to be tested with a seal, placing an air bag sealed with a tracer gas in the through hole, and sealing the through hole The other end is welded and sealed; S2, including the workpiece to be tested for the first air leakage detection; S3, destroying the seal, and performing the second air leakage detection of the workpiece to be tested; S4, collecting the first air leakage The result of the detection and the second air leakage detection; S5, remove the seal, collect the status information of the airbag and judge the airtightness of the through hole. The tracer gas of the present invention is sealed in the air bag, placed in the through hole, and the air bag is destroyed while sealing, so that the tracer gas is sealed into the through hole, which simplifies the process of inflating the through hole and improves the detection efficiency. The present invention uses a detachable seal and conducts air leakage detection again to determine whether the airbag is damaged and whether the tracer gas fills the through hole, thereby preventing missed inspections caused by the undamaged airbag.

Description

technical field [0001] The invention relates to the technical field of air tightness detection, in particular to an air tightness detection method of a through hole. Background technique [0002] Lithium batteries have attracted much attention due to their high energy density, high output power, long charge and discharge life, fast charging, green and pollution-free, wide operating temperature range and small self-discharge. [0003] The internal chemical system of lithium batteries is active, and it is very easy to have side reactions with external moisture and air, resulting in battery performance degradation or failure. Therefore, the airtightness of packaging is crucial to the reliability and safety of lithium batteries. How to effectively detect the airtightness of lithium batteries and ensure that defective packaging products will not flow into the consumer market is of great significance. [0004] At present, some prismatic lithium batteries use a rubber plug to clos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/20
CPCG01M3/20
Inventor 胡忠汉
Owner HUNAN HONGYI TECH CO LTD
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