A diaphragm thickness gauge capable of monitoring detection stability

Abstract

The utility model relates to lithium battery diaphragm manufacturing detection technical field discloses a kind of diaphragm thickness gauge of monitoring detection stability, including base, thickness gauge display and the detection probe vertically installed on the top of the base by branch pipe, the diaphragm thickness gauge includes: pressure sensor, set on the upper surface of the base and located below the detection probe;Pressure display, connect the pressure sensor, for receiving the pressure signal of the pressure sensor and real-time display pressure data, wherein, the thickness data of the thickness gauge display and the pressure data of the pressure display are used for synchronous observation to evaluate the stability of thickness detection.The utility model shows the pressure value when diaphragm thickness gauge test diaphragm each point, ensure the uniformity of pressure value when probe presses down, to monitor the stability of diaphragm thickness that thickness gauge test.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery separator manufacturing and testing technology, specifically a separator thickness gauge that can monitor and test stability. Background Technology

[0002] The separator is one of the key internal components of a lithium battery. The performance of the separator determines the battery's interface structure, internal resistance, and other characteristics, directly affecting its capacity, cycle life, and safety. Among these, the uniformity of separator thickness is a crucial indicator of separator quality and a key parameter affecting lithium-ion permeability, battery performance, and mechanical strength. The thickness of the lithium battery separator is primarily measured using a lithium battery separator thickness gauge; therefore, the stability of the thickness gauge's measurement is of paramount importance.

[0003] Existing thickness gauges are typically mechanical contact thickness gauges. Their principle involves a high-precision probe contacting the material surface and measuring the displacement of the probe relative to a reference platform; this displacement is the material's thickness. However, for lithium battery separators, which are porous materials, the thickness measured is affected by the pressure applied during probe contact. Pressure fluctuations can easily cause varying degrees of compression in the separator. Existing thickness gauges cannot display the applied pressure in real time, and operators cannot perceive pressure consistency, resulting in invisible measurement errors. This makes it impossible to determine whether the measured thickness is the true thickness or the compressed thickness, and consequently, whether the separator thickness uniformity meets standards.

[0004] Therefore, there is an urgent need for a diaphragm thickness gauge that can monitor the stability of the test. This gauge should be able to display the pressure value at each point of the diaphragm when the gauge is testing, ensuring the uniformity of the pressure value when the probe is pressed down. This would allow the gauge to monitor the stability of the diaphragm thickness test and detect problems in a timely manner, preventing false detections from occurring. Utility Model Content

[0005] The purpose of this invention is to provide a diaphragm thickness gauge that can monitor and detect stability, so as to solve the problems mentioned in the background art and achieve the purpose of monitoring the stability of the diaphragm thickness tested by the thickness gauge.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A diaphragm thickness gauge capable of monitoring detection stability includes a base, a thickness gauge display, and a detection probe vertically mounted above the base via a branch pipe. The diaphragm thickness gauge includes:

[0008] A pressure sensor is disposed on the upper surface of the base and located below the detection probe;

[0009] A pressure display, connected to the pressure sensor, is used to receive the pressure signal from the pressure sensor and display the pressure data in real time.

[0010] The thickness data displayed by the thickness gauge and the pressure data displayed by the pressure gauge are used for synchronous observation to evaluate the stability of the thickness detection.

[0011] As a further embodiment of this invention: in order to provide the detection probe with a stable descent speed and downward pressure and reduce pressure fluctuations, the detection probe is a pneumatic probe, and the detection probe is driven to rise and fall by a pneumatic foot pedal valve.

[0012] As a further solution of this utility model: in order to avoid the influence of the thickness of the pressure sensor itself on the measurement results, the thickness gauge display is configured to receive a zeroing command when the diaphragm is not placed.

[0013] As a further aspect of this invention: to ensure the accuracy of the acquired thickness data, the detection probe employs a high-precision displacement sensor.

[0014] As a further aspect of this invention: to ensure the stability of the measurement reference plane on which the diaphragm is placed, the base is made of marble.

[0015] As a further embodiment of this invention: to provide stable support for the detection probe and extend the service life of the equipment, the branch pipe is made of metal.

[0016] As a further aspect of this invention: to avoid the risk of the pointed tip puncturing or scratching the diaphragm, and to make the pressure applied to the diaphragm more evenly distributed, the bottom end of the detection probe is a round flat head.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention features a novel structure. By incorporating a pressure sensor between the probe and the base, connected to a pressure display, the operator can observe and record the probe pressure value for each thickness measurement in real time. Monitoring pressure fluctuations allows for direct evaluation of the thickness gauge's stability, providing an objective and quantitative basis for data reliability assessment. The marble base and metal support tubes form a stable and interference-resistant mechanical platform, effectively resisting external vibrations and stress, ensuring long-term measurement accuracy. The round, flat-headed probe avoids the risk of sharp tips piercing or damaging expensive diaphragm samples, while also ensuring more uniform pressure distribution.

[0019] The pneumatic probe and pneumatic foot valve are existing technologies. This application only uses them in this application and does not involve any improvement to their structure or working principle. Therefore, they will not be described here. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present utility model;

[0021] Figure 2 This is a schematic diagram of the thickness gauge display of this utility model;

[0022] Figure 3 This is a schematic diagram of the pressure display of this utility model;

[0023] Figure 4 This is a schematic diagram of the pneumatic foot valve of this utility model;

[0024] In the diagram: 1-base, 11-branch pipe, 2-detection probe, 3-thickness gauge display, 4-pressure sensor, 5-pressure display, 6-pneumatic foot valve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations.

[0027] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] Please see Figure 1-4In this embodiment of the utility model, a diaphragm thickness gauge capable of monitoring and detecting stability includes a base 1, a detection probe 2, a thickness gauge display 3, a pressure sensor 4, a pressure display 5, a pneumatic foot valve 6, and a branch pipe 11.

[0029] like Figure 1 As shown, base 1 is a reference test platform for thickness measurement. In this embodiment, base 1 is specifically made of marble, which has excellent rigidity, stability, and a low coefficient of thermal expansion. It can effectively resist thermal expansion and contraction caused by changes in ambient temperature and external vibration interference, ensuring that the test platform will not change due to time or environment. Branch pipe 11 is welded to the upper surface of base 1. The detection probe 2 is fixed to branch pipe 11 by pipe clamps, and the axis of the detection probe 2 is perpendicular to the upper surface of base 1, ensuring that the detection probe 2 can move vertically up and down relative to base 1, guaranteeing the positional accuracy of the measurement point and the perpendicularity of the detection probe 2 to the diaphragm. In this embodiment, branch pipe 11 is made of metal, which is sturdy, durable, and extends service life while ensuring stable support for the detection probe 2.

[0030] The detection probe 2 integrates a high-precision displacement sensor. The bottom of the detection probe 2 is machined into a circular, flat-top structure to ensure stable and uniform surface contact with the diaphragm sample, protecting the sample from damage while reflecting the average thickness of the material. For example... Figure 2 As shown, the detection probe 2 is electrically connected to the thickness gauge display 3 via a signal line, transmitting the detected displacement signal to the display for processing and display. The change in displacement between the detection probe 2 and the base 1 without the diaphragm and the displacement between the detection probe 2 and the diaphragm after the diaphragm is placed is the measured diaphragm thickness. In this embodiment, the detection probe 2 is specifically a pneumatic probe, such as... Figure 4 As shown, the pneumatic foot pedal valve 6 is connected to an external air source via an air tube, and simultaneously connected to the pneumatic probe via another air tube. When the pneumatic foot pedal valve 6 is pressed, compressed air pushes the piston inside the detection probe 2, causing it to move downwards. When the pneumatic foot pedal valve 6 is released, the air path is cut off and the air is exhausted. The detection probe 2 moves upwards under the action of the internal spring, thereby realizing foot-controlled operation, freeing the operator's hands, allowing the operator to use both hands specifically for placing and arranging diaphragm samples, improving operational efficiency and convenience. At the same time, the pneumatic drive provides a stable descent speed for the detection probe 2, reducing the impact of pressure fluctuations on thickness measurement.

[0031] Pressure sensor 4 is bonded and fixed to the upper surface of base 1, and is precisely located directly below detection probe 2. For example... Figure 3As shown, the pressure display 5 is connected to the pressure sensor 4 via a signal line to receive and display the pressure value detected by the pressure sensor 4 in real time. It is important to note that before starting the detection probe 2 to press down and measure the diaphragm thickness, the thickness gauge display 3 needs to be zeroed to prevent the thickness of the pressure sensor 4 itself from affecting the diaphragm measurement results and to reduce detection errors. The thickness data displayed on the thickness gauge display 3 and the pressure data displayed on the pressure display 5 are used to evaluate the stability of the thickness gauge's thickness detection.

[0032] This utility model features a novel structure and stable operation. In use, first, connect the power and air supply, then press the pneumatic foot pedal 6 to lower the detection probe 2, ensuring its bottom round flat head makes stable contact with the upper surface of the pressure sensor 4. At this time, operate the "zero" button on the thickness gauge display 3 to calibrate the current thickness display value to zero. This step aims to eliminate systematic errors caused by the thickness of the pressure sensor 4 itself in subsequent diaphragm thickness measurements. After zeroing, press the pneumatic foot pedal 6 again to raise the detection probe 2. Place the lithium battery diaphragm sample to be tested flat on the upper surface of the pressure sensor 4. Press the pneumatic foot pedal 6 again to lower the detection probe 2, and its round flat head will finally press firmly against the diaphragm sample. At this time, the thickness gauge display 3 will display the diaphragm thickness data in real time, while the pressure display 5 will display the pressure data applied by the detection probe 2 to the diaphragm in real time. These two data points can be observed simultaneously. If, during multiple measurements, the pressure data remains stable while the thickness data fluctuates, it indicates that the diaphragm itself has uneven thickness. If significant fluctuations in pressure data occur during multiple measurements, even if the thickness data remains stable, it indicates instability in the thickness gauge, requiring maintenance and calibration. If both pressure and thickness data remain stable across multiple measurements, it indicates that the diaphragm thickness maintains high uniformity under constant pressure applied by the detection probe 2. After measurement, release the pneumatic foot valve 6; the detection probe 2 will automatically lift, allowing the diaphragm sample to be removed.

[0033] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0034] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A diaphragm thickness gauge capable of monitoring detection stability, comprising a base (1), a thickness gauge display (3), and a detection probe (2) vertically mounted above the base (1) via a branch pipe (11), characterized in that, The diaphragm thickness gauge includes: A pressure sensor (4) is disposed on the upper surface of the base (1) and located below the detection probe (2); The pressure display (5) is connected to the pressure sensor (4) and is used to receive the pressure signal from the pressure sensor (4) and display the pressure data in real time. The thickness data displayed on the thickness gauge (3) and the pressure data displayed on the pressure gauge (5) are used for synchronous observation to evaluate the stability of the thickness detection.

2. The diaphragm thickness gauge according to claim 1, characterized in that: The detection probe (2) is a pneumatic probe, which is driven to rise and fall by a pneumatic foot valve (6).

3. The diaphragm thickness gauge according to claim 1, characterized in that: The thickness gauge display (3) is configured to receive zeroing commands when no diaphragm is placed.

4. The diaphragm thickness gauge according to claim 1, characterized in that: The detection probe (2) uses a high-precision displacement sensor.

5. The diaphragm thickness gauge according to claim 1, characterized in that: The base (1) is made of marble.

6. The diaphragm thickness gauge according to claim 1, characterized in that: The branch pipe (11) is made of metal.

7. The diaphragm thickness gauge according to claim 1, characterized in that: The bottom of the detection probe (2) is a round flat head.

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