Film breathability detection device

Abstract

The utility model belongs to the technical field of film air permeability detection, and discloses a film air permeability detection device, during detection, a film can be cut off through a film cutting knife, and a driving piece respectively drives two brackets to move so as to drive two detection assemblies to approach the film, so that the two detection assemblies respectively abut against the surfaces of the two sides of the film to clamp and fix the film. In addition, according to the film permeability detection device, the film is cut off through the film cutting knife, the driving part drives the detection assemblies to move, automatic detection of the permeability of the film can be achieved, and the problem that in the prior art, manual detection efficiency is low is solved.

Description

Technical Field

[0001] This utility model relates to the field of thin film air permeability testing technology, and in particular to a thin film air permeability testing device. Background Technology

[0002] The separator is a crucial structural component of a battery, and its permeability needs to be tested during the separator's production process. Currently, the conventional testing method is manual inspection. After the separator is produced, it is manually cut from the surface of the membrane roll for testing, including permeability testing. This method is inefficient, time-consuming, and labor-intensive, and cannot achieve online testing during separator production. Utility Model Content

[0003] This invention provides a membrane permeability testing device to solve the problem of low membrane permeability testing efficiency in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A membrane air permeability testing device is used to test the air permeability of a membrane. The membrane air permeability testing device includes:

[0006] A film-cutting blade is used to cut the film.

[0007] The support is provided in two parts, which are arranged at a distance from each other in the vertical direction and are configured to be located on both sides of the film respectively;

[0008] The detection module includes two detection components, which are respectively disposed on two supports. The two detection components can respectively abut against the two sides of the film to perform air permeability detection on the film.

[0009] A driving element is used to drive the two supports to move, thereby moving the two detection components closer to or away from the film.

[0010] As a preferred embodiment of the film permeability testing device, it further includes a first winding shaft and a second winding shaft, with the film-cutting knife and the testing module both located between the first winding shaft and the second winding shaft.

[0011] As a preferred embodiment of the membrane permeability detection device, the driving component includes a first driving component for driving one of the supports to move and a second driving component for driving the other support to move.

[0012] As a preferred embodiment of the membrane permeability testing device, the bracket extends along the width direction of the membrane, and two first driving members are provided, each connected to one end of the bracket; two second driving members are provided, each connected to one end of the other bracket.

[0013] As a preferred embodiment of the membrane permeability testing device, the two testing components are a first testing component and a second testing component. The first testing component has a first cavity and an air inlet communicating with the first cavity. The second testing component has a second cavity and an air outlet communicating with the second cavity. The first testing component and the second testing component can respectively abut against both sides of the membrane so that the first cavity and the second cavity cooperate with each other to form a sealed space. The air inlet is used for gas to enter and is used to connect to the output end of an air compressor. The air outlet is used for gas to flow out and is used to connect to the inlet end of a gas flow sensor.

[0014] As a preferred embodiment of the membrane permeability testing device, the bracket located below the membrane has a mounting groove, and in the testing module, the testing component located below the membrane is disposed within the mounting groove.

[0015] As a preferred embodiment of the membrane permeability testing device, the testing module is provided with multiple modules.

[0016] As a preferred embodiment of the membrane permeability testing device, a plurality of the testing modules are arranged at intervals along the width direction of the membrane.

[0017] As a preferred embodiment of the membrane permeability testing device, the distance between any two adjacent testing modules along the width direction of the membrane is d, where 5cm≤d≤15cm.

[0018] As a preferred embodiment of the membrane permeability testing device, it further includes a controller and an operating terminal that is communicatively connected to the controller, wherein the two testing components of the testing module and the driving component are all communicatively connected to the controller.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a film permeability testing device for testing the permeability of films. The device includes a film-cutting blade, supports, a testing module, and a driving component. The film-cutting blade cuts the film. Two supports are provided, spaced apart vertically, and positioned on opposite sides of the film. The testing module includes two testing components, each mounted on one of the supports and capable of contacting the opposite sides of the film for permeability testing. The driving component moves the supports to move the testing components closer to or away from the film. During testing, the film is cut by the film-cutting blade, and the driving component moves the supports to bring the testing components closer to the film, so that they contact the opposite sides of the film, clamping and fixing the film. The permeability is then tested using these components. Furthermore, this film permeability testing device, by cutting the film with the film-cutting blade and moving the testing components with the driving component, enables automatic testing of film permeability, solving the problem of low efficiency in existing manual testing methods. Attached Figure Description

[0021] Figure 1 This is a first structural schematic diagram of the membrane air permeability detection device in this embodiment of the present invention;

[0022] Figure 2 This is a second structural schematic diagram of the membrane air permeability detection device in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the third structure of the membrane air permeability detection device in this embodiment of the present invention.

[0024] In the picture:

[0025] 100. Film;

[0026] 1. Bracket; 11. Mounting sleeve;

[0027] 2. Detection components;

[0028] 3. Driving components;

[0029] 4. First reel;

[0030] 5. Second reel;

[0031] 6. Membrane-cutting knife;

[0032] 7. Controller;

[0033] 8. Operating terminal; 81. Data import and display device; 82. Operating box; 821. Film cutting button; 822. Detection button. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] The separator is a crucial structural component of a battery, and its permeability needs to be tested during the separator's production process. Currently, the conventional testing method is manual inspection. After the separator is produced, it is manually cut from the surface of the membrane roll for testing, including permeability testing. This method is inefficient, time-consuming, and labor-intensive, and cannot achieve online testing during separator production.

[0039] In response, this embodiment provides a membrane permeability testing device to solve the problem of low membrane permeability testing efficiency in the prior art, and it can be used in the field of membrane permeability testing technology.

[0040] Reference Figures 1-2The membrane permeability testing device is used to test the permeability of the membrane 100, specifically the separator of a battery. In other embodiments, the membrane 100 may be other structures. The membrane permeability testing device includes a membrane cutter 6, a support 1, a testing module, and a driving component. The membrane cutter 6 is used to cut the membrane 100. Two supports 1 are provided, spaced apart vertically, and configured to be located on opposite sides of the membrane 100. The testing module includes two testing components 2, which are respectively disposed on the two supports 1 and can abut against the opposite sides of the membrane 100 to test its permeability. The driving component 3 is used to drive the two supports 1 to move, thereby moving the two testing components 2 closer to or further away from the membrane 100. During testing, the film 100 is cut by the cutting blade 6, and the driving component 3 drives the two supports 1 to move, thereby bringing the two detection components 2 closer to the film 100. This allows the two detection components 2 to abut against the two side surfaces of the film 100, clamping and fixing the film 100, and then performing air permeability testing on the film 100 through the two detection components 2. Furthermore, this film air permeability testing device, by cutting the film 100 with the cutting blade 6 and driving the detection components 2 with the driving component 3, can automatically detect the air permeability of the film 100, solving the problem of low efficiency in existing manual testing techniques.

[0041] Continue to refer to Figures 1-2 The driving component 3 includes a first driving component for driving the movement of one of the supports 1 and a second driving component for driving the movement of the other support 1, so that the two supports 1 are driven by separate driving structures. This allows the other detection component 2 to move while ensuring that the position of one detection component 2 remains unchanged. With this configuration, the heights of the two detection components 2 can be adjusted by the two driving components 3 according to the actual height of the film 100, making them compatible with the current height of the film 100. This ensures that the height of the area to be detected on the film 100 does not change after the two detection components 2 press against the film 100, thus preventing deformation of the film 100. This embodiment exemplarily provides a scheme where the driving component 3 located above the film 100 is the first driving component, and the driving component 3 located below the film 100 is the second driving component.

[0042] Continue to refer to Figures 1-2 The support 1 extends along the width direction of the film 100. Two first driving members are provided, and the two first driving members are respectively connected to the two ends of one of the supports 1. Two second driving members are provided, and the two second driving members are respectively connected to the two ends of the other support 1. Thus, the two ends of one of the supports 1 are driven to move by the two first driving members, so that the support 1 can move smoothly. In addition, the two ends of one support 1 are driven to move by the two second driving members, so that the support 1 can also move smoothly.

[0043] In this embodiment, both the first and second driving components are electro-hydraulic cylinders made of 304 stainless steel. In other embodiments, the first and second driving components can also be linear drive mechanisms such as pneumatic cylinders. Furthermore, as an alternative, the driving component 3 can also be a motor or similar structure. The motor can simultaneously drive the two supports 1 to move synchronously via a gear-rack mechanism, thus reducing the number of driving components 3.

[0044] Continue to refer to Figures 1-2 The film permeability testing device also includes a first winding shaft 4 and a second winding shaft 5. One end of the film 100 is wound onto the film 100, and the other end is wound onto the second winding shaft 5. The film cutting blade 6 and the testing module are both located between the first winding shaft 4 and the second winding shaft 5. Since the lengths of the film 100 wound on the first winding shaft 4 and the second winding shaft 5 are different, their thicknesses wound on the two winding shafts are also different. This results in the film 100 located between the two testing modules having different heights relative to the first winding shaft 4 or the second winding shaft 5. The film permeability testing device can adjust the height of the testing components 2 of the two testing modules to match the current height of the film 100.

[0045] The film 100 can also be transported between two take-up shafts, for example, unwound by the first take-up shaft 4 and wound up by the second take-up shaft 5, or unwound by the second take-up shaft 5 and wound up by the first take-up shaft 4. In use, while the detection components 2 of the two detection modules press against the two sides of the film 100, the film cutter 6 begins to cut the film 100. After cutting, both take-up shafts stop working. After the air permeability test of the film 100 is completed, the film 100 can be disassembled. Furthermore, because the film cutter 6 generates a large amount of static electricity adhering to the surface of the film 100 when cutting it, the portion of the film 100 located between the two detection modules is usually cut off and discarded. The outermost layer of the film 100 wound on the first take-up shaft 4 and the second take-up shaft 5 also needs to be cut off according to the actual situation. Therefore, after the air permeability test is completed, the portion of the film 100 located between the two detection modules can be directly discarded without needing to be wound up on the take-up shafts.

[0046] Continue to refer to Figures 1-2The two detection components 2 are a first detection component and a second detection component, respectively. The first detection component has a first cavity and an air inlet communicating with the first cavity. The second detection component has a second cavity and an air outlet communicating with the second cavity. The first and second detection components can respectively abut against the two sides of the membrane, so that the first and second cavities cooperate with each other to form a sealed space. The air inlet is used for gas to enter and is used to connect to the output end of the air compressor. The air outlet is used for gas to flow out and is used to connect to the inlet end of the gas flow sensor. Thus, the current gas flow can be detected by the gas flow sensor, and the parameter value of the air permeability of the membrane 100 can be obtained after processing. This embodiment exemplarily shows a scheme in which the detection component 2 located above the membrane 100 is the first detection component and the detection component 2 located below the membrane 100 is the second detection component. That is, the gas enters the first cavity from the upper air inlet, enters the second cavity after passing through the membrane 100, and flows out from the air outlet. In other embodiments, the detection component 2 located below the film 100 can be used as the first detection component, and the detection component 2 located above the film 100 can be used as the second detection component.

[0047] Continue to refer to Figures 1-2 The support 1 located below the membrane 100 has a mounting groove. In the detection module, the detection component 2 located below the membrane 100 is disposed within the mounting groove. Specifically, the support 1 includes a support body and a mounting sleeve 11 disposed on the support body. The mounting sleeve 11 has a mounting groove, and the detection component 2 is disposed within the mounting groove of the mounting sleeve 11, with the mounting sleeve 11 enclosing the outer wall of the detection component 2. This arrangement allows the upper surfaces of the support 1 and the detection component 2 located below the membrane 100 to be made into a flat surface, enabling the membrane 100 to be laid flat on the support 1 and the detection component 2 located below the membrane 100, thus providing stable support for the membrane 100.

[0048] Optionally, the detection component 2 located above the film 100 is directly protruding downward relative to the support 1 located above the film 100, so as to ensure that the detection component 2 located above the film 100 and the detection component 2 located below the film 100 are respectively attached to the two side surfaces of the film 100.

[0049] Continue to refer to Figures 1-2 The detection module is set with multiple modules, so the air permeability of the film 100 can be detected simultaneously by setting multiple detection modules, which can reduce measurement error.

[0050] Optionally, multiple detection modules are spaced apart along the width direction of the film 100 so that the multiple detection modules can detect the air permeability of the film 100 at multiple locations along the width direction of the film 100.

[0051] Optionally, along the width direction of the film 100, the distance between any two adjacent detection modules is d, where 5cm ≤ d ≤ 15cm, to minimize the distance between adjacent detection modules and increase the number of detection modules. In this embodiment, the distance between any two adjacent detection modules is 10cm. Furthermore, along the width direction of the film 100, the length of the support 1 is 3 to 10m, and along the length direction of the film 100, the width of the support 1 is 10 to 15cm.

[0052] Reference Figure 3 The film permeability testing device also includes a controller 7 and an operation terminal 8 communicatively connected to the controller 7. The two detection components 2 and the drive unit 3 of the detection module are all communicatively connected to the controller 7. The operation terminal 8 includes a data import and display device 81 and an operation box 82. The data import and display device 81 displays relevant data, and the operation box 82 includes a film-cutting button 821 and a detection button 822. The operator can send relevant operation commands to the controller 7 through different buttons on the operation box 82, thereby receiving commands from the operation terminal 8 and controlling the operation of the detection components 2 and the drive unit 3. The controller 7 can also send relevant data to the data import and display device 81 for the operator. In use, the operator can simultaneously press the film-cutting button 821 and the detection button 822 to make the film permeability testing device perform film cutting and permeability testing. Optionally, the film permeability testing device also includes a power supply, with a voltage regulator installed between the power supply and the drive unit 3 to maintain a constant voltage supplied to the drive unit 3.

[0053] The process of the membrane permeability testing device for testing the membrane 100 is as follows: two winding shafts drive the membrane 100 to a preset position and then stop rotating. The membrane blade 6 descends and cuts the membrane 100. At the same time, the two detection components 2 move closer to each other to clamp the membrane 100, so that the first cavity and the second cavity form a sealed space. At this time, the air compressor blows gas into the first cavity through the air inlet. Some of the gas will pass through the membrane 100 into the second cavity and flow out through the air outlet. Then it flows to the gas flow sensor. The gas flow sensor detects the current gas flow and sends it to the controller. The controller obtains the time for the preset amount of gas to flow through the gas flow sensor. In this way, the time for the preset amount of gas to pass through the membrane 100 from the first cavity to the second cavity is obtained, which characterizes the permeability of the membrane 100.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A membrane permeability testing device, used for testing the permeability of a membrane (100), characterized in that, The membrane air permeability detection device includes: A film-cutting blade (6) is used to cut the film (100); There are two supports (1), which are arranged at intervals in the vertical direction and are respectively located on both sides of the film (100); The detection module includes two detection components (2), which are respectively disposed on two supports (1). The two detection components (2) can respectively abut against the two sides of the film (100) to perform air permeability detection on the film (100). A drive (3) is used to drive the two supports (1) to move so as to move the two detection components (2) closer to or away from the film (100).

2. The membrane permeability testing device according to claim 1, characterized in that, It also includes a first take-up shaft (4) and a second take-up shaft (5), with the film-cutting knife (6) and the detection module located between the first take-up shaft (4) and the second take-up shaft (5).

3. The membrane permeability testing device according to claim 1, characterized in that, The drive unit (3) includes a first drive unit for driving one of the brackets (1) to move and a second drive unit for driving the other bracket (1) to move.

4. The membrane permeability testing device according to claim 3, characterized in that, The bracket (1) extends along the width direction of the film (100). Two first driving members are provided, and the two first driving members are respectively connected to the two ends of one of the brackets (1). Two second driving members are provided, and the two second driving members are respectively connected to the two ends of the other bracket (1).

5. The membrane permeability testing device according to any one of claims 1-4, characterized in that, The two detection components (2) are a first detection component and a second detection component, respectively. The first detection component has a first cavity and an air inlet communicating with the first cavity. The second detection component has a second cavity and an air outlet communicating with the second cavity. The first detection component and the second detection component can respectively abut against the two sides of the film so that the first cavity and the second cavity cooperate with each other to form a sealed space. The air inlet is used for gas to enter and is used to connect to the output end of the air compressor. The air outlet is used for gas to flow out and is used to connect to the inlet end of the gas flow sensor.

6. The membrane permeability testing device according to any one of claims 1-4, characterized in that, The bracket (1) located below the film (100) has a mounting groove, and in the detection module, the detection component (2) located below the film (100) is disposed in the mounting groove.

7. The membrane permeability testing device according to any one of claims 1-4, characterized in that, The detection module is configured in multiple ways.

8. The membrane permeability testing device according to claim 7, characterized in that, Multiple detection modules are spaced apart along the width direction of the film (100).

9. The membrane permeability testing device according to claim 7, characterized in that, Along the width direction of the film (100), the distance between any two adjacent detection modules is d, where 5cm≤d≤15cm.

10. The membrane permeability testing device according to any one of claims 1-4, characterized in that, It also includes a controller (7) and an operation terminal (8) that is communicatively connected to the controller (7). The two detection components (2) and the drive unit (3) of the detection module are all communicatively connected to the controller (7).

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