A device for leak testing a porous ionically conductive membrane

Abstract

The utility model discloses a kind of porous ion conducting membrane air-tightness detection devices, including machine body, the bracket is fixedly installed in machine body upper, bracket is equipped with press-down driving assembly and horizontally arranged slider, slider is slidably installed on bracket, the action part of press-down driving assembly is connected slider;The bottom of the slider is fixedly installed with cover plate, the bottom surface of cover plate is upwardly provided with upper groove;The upper groove is communicated with first air pipe, first air pipe is communicated with air source by pressure regulating valve;The bottom plate is installed on the machine body, the lower groove is formed in the bottom plate;The lower groove is communicated with second air pipe, and second air pipe is connected with gas flow meter.The device can accurately and effectively detect the air tightness of porous ion conducting membrane, and the device uses flow method to select qualified porous ion conducting membrane by observing the size of gas flow, which can avoid the membrane with holes that cannot be observed by naked eye from being installed in the battery, and improve the performance and life of the battery.

Description

Technical Field

[0001] This utility model belongs to the field of porous ion conduction membrane detection equipment, specifically relating to a porous ion conduction membrane airtightness detection device. Background Technology

[0002] Flow batteries, due to their advantages such as independent output power and capacity, flexible system design, high energy efficiency, long lifespan, high operational stability and reliability, low self-discharge, high site selection freedom, no pollution, simple maintenance, low operating costs, and high safety, have broad development prospects in large-scale energy storage. As a key component of flow batteries, the porous ion-conducting membrane's ability to block the active materials of the positive and negative electrodes has a significant impact on the battery. However, the porous ion-conducting membrane may contain microscopic pores that are invisible to the naked eye. These pores can lead to cross-mixing of the positive and negative electrodes during charge and discharge, severe self-reaction, increased temperature, accelerated membrane damage, and affect battery performance and lifespan. Existing optical detection equipment cannot detect nanoscale pores. Therefore, there is an urgent need for a device capable of effectively detecting the airtightness of porous ion-conducting membranes. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention aims to provide a porous ion-conducting membrane airtightness testing device. This device can accurately and effectively test the airtightness of porous ion-conducting membranes. It utilizes the flow rate method to select qualified porous ion-conducting membranes by observing the gas flow rate. This avoids the installation of membranes with pores that are not visible to the naked eye into batteries, thereby improving battery performance and lifespan. Furthermore, the gas flow rate can be observed in real time, providing accurate data and high testing efficiency, making it suitable for large-scale production testing.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A porous ion-conducting membrane airtightness detection device includes a body, a bracket fixedly mounted on the top of the body, a downward driving component and a horizontally arranged slider on the bracket, the slider being slidably mounted on the bracket, and the actuating part of the downward driving component connected to the slider; a cover plate fixedly mounted on the bottom of the slider, the bottom surface of the cover plate having an upper groove; a first air pipe communicating with the upper groove on the cover plate, the first air pipe being connected to an air source through a pressure regulating valve; a base plate corresponding to the cover plate fixedly mounted on the top surface of the body, the top surface of the base plate having a lower groove; a second air pipe communicating with the lower groove on the base plate, the second air pipe being connected to an air flow meter.

[0006] Preferably, the bracket includes a top plate and a guide column, the lower end of the guide column is vertically fixed to the top of the machine body, and the top plate is horizontally fixed to the upper end of the guide column; the slider is slidably mounted on the guide column; and the downward driving assembly is mounted on the top plate.

[0007] Preferably, four guide pillars are provided at the four corners of the machine body.

[0008] Preferably, the slider has a vertical through hole, and the guide post is vertically slidably sleeved in the through hole.

[0009] Preferably, the downward driving component is a hydraulic cylinder or pneumatic cylinder installed vertically downwards.

[0010] Preferably, sealing gaskets are provided at the opening edges of the upper and lower grooves.

[0011] Preferably, the pressure range provided by the downward pressure drive assembly during airtightness testing is 2T-10T.

[0012] Preferably, the gas pressure provided by the gas source is in the range of 20 kPa to 50 kPa.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. When the downward drive assembly of this application drives the slider to slide up and down, the sliding cooperation between the guide post and the through hole on the slider can effectively improve the stability of the cover plate and the slider moving up and down, thereby improving the accuracy of the airtightness detection of this device.

[0015] 2. When the downward driving assembly of this application drives the slider and cover plate to press down for airtightness testing, the downward driving assembly can provide a pressure of 2T-10T, thereby achieving an effective sealing effect and forming a cavity in the groove between the cover plate and the base plate.

[0016] 3. The upper and lower grooves of this device are equipped with sealing gaskets at their respective opening edges. The two corresponding sealing gaskets can significantly improve the airtightness of this device during airtightness testing and provide excellent pressure holding effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Reference numerals: 1. Bracket; 11. Top plate; 12. Guide column; 2. Downward drive assembly; 3. Slider; 30. Perforation; 4. Cover plate; 41. First air pipe; 5. Bottom plate; 50. Lower groove; 51. Second air pipe; 6. Sealing gasket; 7. Body. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of application of this utility model.

[0020] like Figure 1As shown, this utility model proposes a porous ion-conducting membrane airtightness detection device, including a body 7, a bracket 1 fixedly installed on the top of the body 7, a downward driving component 2 and a horizontally arranged slider 3 on the bracket 1, the slider 3 being slidably mounted on the bracket 1, the actuating part of the downward driving component 2 being connected to the slider 3, and a cover plate 4 being fixedly installed on the bottom of the slider 3. Specifically, in this embodiment, the bracket 1 includes a top plate 11 and four guide posts 12, the four guide posts 12 being vertically fixed at the four corners above the body 7, and the top plate 11 being horizontally fixed at the upper end of the guide posts 12. The slider 3 has four vertically penetrating holes 30, and the four guide posts 12 are vertically slidably fitted into the corresponding holes 30. The downward driving component 2 is installed on the top plate 11. In specific implementations, the downward driving component 2 can be a downwardly vertically mounted hydraulic cylinder or pneumatic cylinder, etc.

[0021] When the downward driving component 2 of this application drives the slider 3 to slide up and down, the sliding cooperation between the guide post 12 and the through hole 30 on the slider 3 can effectively improve the stability of the cover plate 4 and the slider 3 moving up and down, thereby improving the accuracy of the airtightness detection of this device.

[0022] The bottom surface of the cover plate 4 has an upward-facing upper groove, and the top surface of the body 7 is fixedly installed with a base plate 5 that corresponds to and matches the cover plate 4. The top surface of the base plate 5 has a downward-facing lower groove 50. In this embodiment, the upper groove and the lower groove 50 are square grooves of the same shape and size, and are symmetrical.

[0023] When the downward pressure drive assembly 2 drives the slider 3 and cover plate 4 to press down for airtightness testing, the downward pressure drive assembly 2 can provide a pressure of 2T-10T, thereby achieving an effective sealing effect and forming a cavity in the groove between the cover plate 4 and the base plate 5. In addition, sealing gaskets 6 are provided at the opening edges of the upper and lower grooves 50 of this device. The two corresponding sealing gaskets 6 can significantly improve the airtightness of this device during airtightness testing, and have excellent pressure holding effect.

[0024] A first air pipe 41 is connected to the upper groove on the cover plate 4. The first air pipe 41 is connected to an air source through a pressure regulating valve. The air pressure provided by the air source is in the range of 20 kPa-50 kPa, and the air intake time is 5 s-20 s. A second air pipe 51 is provided on the bottom plate 5, which is connected to the lower groove 50. The second air pipe 51 is connected to an air flow meter. In actual testing, the air flow rate is generally 5-20 sccm. The air flow rate standard can be preset according to the actual air flow rate requirements. For example, setting the air flow rate standard ≤15 sccm is considered qualified.

[0025] When using this invention, first place the porous ion-conducting membrane on the base plate 5, then start the pressing drive assembly 2. The slider 3 drives the cover plate 4 to press down, squeezing the porous ion-conducting membrane between the cover plate 4 and the base plate 5. Open the regulating valve, and the air source will supply air. After entering the cavity formed by the upper groove through the first air pipe 41, the air passes through the porous ion-conducting membrane and enters the cavity of the lower groove 50, and then exits through the second air pipe 51. After the air pressure is reached, check and record the air flow rate of the air flow meter. According to the preset air flow rate standard, it can be determined whether the porous ion-conducting membrane is qualified.

[0026] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A porous ion-conducting membrane airtightness detection device, comprising a body, characterized in that: A bracket is fixedly installed on the top of the machine body. The bracket is equipped with a downward driving component and a horizontally arranged slider. The slider is slidably mounted on the bracket. The actuating part of the downward driving component is connected to the slider. A cover plate is fixedly installed on the bottom of the slider. An upper groove is formed on the bottom surface of the cover plate. A first air pipe is provided on the cover plate and communicates with the upper groove. The first air pipe is connected to an air source through a pressure regulating valve. A base plate corresponding to the cover plate is fixedly installed on the top surface of the machine body. A lower groove is formed on the top surface of the base plate. A second air pipe is provided on the base plate and communicates with the lower groove. The second air pipe is connected to an air flow meter.

2. The porous ion-conducting membrane airtightness detection device according to claim 1, characterized in that: The bracket includes a top plate and a guide column. The lower end of the guide column is vertically fixed to the top of the machine body, and the top plate is horizontally fixed to the upper end of the guide column. The slider is slidably mounted on the guide column. The downward driving assembly is mounted on the top plate.

3. The porous ion-conducting membrane airtightness detection device according to claim 2, characterized in that: The guide pillars are located at the four corners of the machine body.

4. The porous ion-conducting membrane airtightness detection device according to claim 2, characterized in that: The slider has a vertical through hole, and the guide post is vertically slidably sleeved in the through hole.

5. The porous ion-conducting membrane airtightness detection device according to claim 1, characterized in that: The downward pressure drive assembly is a hydraulic cylinder or pneumatic cylinder installed vertically downwards.

6. The porous ion-conducting membrane airtightness detection device according to claim 1, characterized in that: The opening edges of the upper and lower grooves are respectively provided with sealing gaskets.

7. The porous ion-conducting membrane airtightness detection device according to claim 1, characterized in that: The pressure range provided by the pressure-driving component during airtightness testing is 2T-10T.

8. The porous ion-conducting membrane airtightness detection device according to claim 1, characterized in that: The gas source provides a pressure range of 20 kPa to 50 kPa.

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