Film inspection mechanism, coating device, and film coating method

Abstract

A film inspection mechanism (100), comprising: a housing assembly (10), a weight measurement assembly (30), a moisture measurement member (20), and an isolation member (40). The housing assembly (10) defines a measurement cavity (13) used for placing a film under inspection; the weight measurement assembly (30) is mounted in the housing assembly (10) and is used for acquiring the weight of the film under inspection; the moisture measurement member (20) is mounted in the housing assembly (10) and is used for acquiring the moisture of the film under inspection; the housing assembly (10) comprises two housings; the weight measurement assembly (30) comprises a transmitting member (31) and a receiving member (32), and the transmitting member (31) and the receiving member (32) are respectively provided on the two housings; the isolation member (40) is provided on the housing assembly (10) provided with the moisture measurement member (20) and is located between the moisture measurement member (20) and the transmitting member (31) or the receiving member (32). Also provided are a coating device having the film inspection mechanism (100), and a film coating method.

Description

Membrane testing mechanism, coating device and membrane coating method

[0001] This application claims priority to Chinese Patent Application No. 2024104881026, filed on April 23, 2024, entitled “Membrane Testing Mechanism, Coating Apparatus and Membrane Coating Method”, the entirety of which is incorporated herein by reference. [Technical Field]

[0002] This application relates to the field of membrane testing technology, and in particular to a membrane testing mechanism, a coating device, and a membrane coating method. [Background Technology]

[0003] Before battery production, the battery electrodes need to be coated to form a film. Existing coating equipment can be used for electrode coating, but its film inspection mechanism only monitors film appearance and weight, failing to detect film humidity and thus unable to promptly confirm the dry film weight. This can lead to the risk of uneven coating, which can cause film run-through and potentially result in lithium plating inside the battery. Furthermore, existing coating equipment requires manual adjustment of the drying oven, introducing a time lag.

[0004] [Summary of the Invention]

[0005] This application provides a membrane testing mechanism, a coating device, and a membrane coating method, aiming to solve the aforementioned problems.

[0006] This application provides a membrane testing mechanism, which includes: a housing assembly, a weighing assembly, a humidity measuring element, and an isolating element. The housing assembly forms a measuring cavity for placing a membrane to be tested. The weighing assembly is installed on the housing assembly and is used to obtain the weight of the membrane to be tested. The humidity measuring element is installed on the housing assembly and is used to obtain the humidity of the membrane to be tested. The housing assembly includes two housings, which are spaced apart to form the measuring cavity. The weighing assembly includes a transmitter and a receiver, which are respectively disposed on the two housings. The humidity measuring element is disposed on one of the housings. The isolating element is disposed on the housing with the humidity measuring element and is located between the humidity measuring element and the transmitter or receiver on the same housing. Therefore, the weight and humidity of the membrane under test can be simultaneously detected and obtained through the membrane testing mechanism, which can improve the efficiency of confirming the dry film quality of the membrane under test and reduce the risk of uneven distribution of the membrane. This method can also improve the integration of the membrane testing mechanism and improve the measurement accuracy. In addition, by mounting the weighing component and the humidity measuring component on a housing, the humidity and weight of the membrane under test can be tested at the same location, which is convenient for subsequent calculation of the dry film quality of the membrane under test. Furthermore, placing the isolation component between the humidity measuring component and the transmitter or receiver on the same housing can further reduce signal interference between the humidity measuring component and the transmitter or receiver, thereby improving the accuracy of the obtained weight and humidity.

[0007] In some embodiments, the transmitter and receiver are arranged overlappingly along the arrangement direction of the two housings, and the humidity measuring element and the transmitter or receiver located on the same housing are arranged at intervals. Therefore, arranging the transmitter and receiver overlapping along the arrangement direction of the two housings facilitates the receiver receiving the transmitted signal from the transmitter penetrating the diaphragm under test, which can improve the efficiency of the weighing assembly in testing the weight of the diaphragm under test. The interval arrangement of the humidity measuring element and the transmitter or receiver can reduce signal interference and temperature interference between them.

[0008] In some embodiments, the membrane testing mechanism further includes a temperature sensor disposed on the insulating member for acquiring the temperature of the membrane to be tested. Therefore, by using a temperature sensor, the temperature of the membrane to be tested can be acquired, thereby reducing the interference of temperature on the weighing component and the humidity measuring component.

[0009] In some embodiments, a first guide rail and a second guide rail are respectively provided on the two housings, and the extending directions of the first guide rail and the second guide rail are perpendicular to the transmission direction and the arrangement direction of the diaphragm under test. Therefore, the first guide rail and the second guide rail allow the diaphragm testing mechanism to move in coordination with other mechanisms. Furthermore, setting the extending directions of the first guide rail and the second guide rail perpendicular to the transmission direction and the arrangement direction of the diaphragm under test facilitates the diaphragm testing mechanism to test diaphragms at any position on the worktable.

[0010] In some embodiments, the weighing component includes an areal density meter component; and / or the moisture measuring component includes a moisture meter. Therefore, configuring the weighing component as an areal density meter component can improve the accuracy of obtaining the weight of the membrane under test, and configuring the moisture measuring component as a moisture meter can improve the accuracy of obtaining the humidity of the membrane under test.

[0011] This application also provides a coating apparatus, which includes a film detection mechanism, an oven mechanism, and a control mechanism as described above. The oven mechanism is used to dry the film to be tested; the film detection mechanism is used to acquire the weight and humidity of the film to be tested output from the oven mechanism; the control mechanism is communicatively connected to both the oven mechanism and the film detection mechanism, and is used to process the weight and humidity to obtain a control signal, and use the control signal to control the oven mechanism. Therefore, the coating apparatus of this embodiment can process the weight and humidity to obtain the dry film quality of the film to be tested, and generate a control signal, thereby controlling the oven mechanism using the control signal. This enables intelligent control of the oven mechanism, eliminating the need for manual adjustment and reducing losses caused by defects in the film to be tested.

[0012] In some embodiments, the coating apparatus further includes an unwinding mechanism, a winding mechanism, and a worktable; the film detection mechanism, the unwinding mechanism, the winding mechanism, and the oven mechanism are all connected to the worktable, with the oven mechanism positioned between the unwinding mechanism and the winding mechanism; the film detection mechanism is positioned between the oven mechanism and the winding mechanism; wherein, the unwinding mechanism is used to release the film to be tested onto the worktable; and the winding mechanism is used to wind up the dried film to be tested. Therefore, positioning the film detection mechanism between the oven mechanism and the winding mechanism allows the film detection mechanism to promptly detect the film to be tested after it has been dried by the oven mechanism, and enables the control mechanism to adjust the oven mechanism in a timely manner, thereby reducing the loss of the film to be tested.

[0013] In some embodiments, the coating apparatus further includes an appearance inspection mechanism disposed between the oven mechanism and the film inspection mechanism, for acquiring appearance information of the film to be tested on the worktable; wherein, the control mechanism is also communicatively connected to the appearance inspection mechanism, and the control mechanism is also used to process the appearance information to obtain the defect type, and to control the oven mechanism using the defect type and control signals. Therefore, the appearance inspection mechanism can quickly acquire visible defects of the film to be tested, thereby facilitating timely adjustments to the oven mechanism by the control mechanism, and further reducing the loss of the film to be tested.

[0014] In some embodiments, the coating apparatus further includes a coating mechanism connected to the worktable and disposed between the unwinding mechanism and the drying oven mechanism. The coating mechanism is used to perform coating operations. The control mechanism is also communicatively connected to the coating mechanism and is used to control the coating mechanism based on control signals. Thus, the control mechanism can obtain the dry film quality of the film under test based on weight and humidity, and generate control signals based on the dry film quality. If the dry film quality of the film under test does not meet the standard, the control mechanism can adjust the coating mechanism in a timely manner, thereby reducing losses caused by substandard dry film quality.

[0015] In some embodiments, the coating mechanism includes a coating tank assembly and a screw pump assembly. The coating tank assembly stores coating material, and the screw pump assembly, connected to the coating tank assembly, coats the membrane under test. Thus, the weight of the membrane under test can be adjusted by controlling the pumping speed of the screw pump assembly.

[0016] This application also provides a membrane coating method, which is applied to a coating apparatus including a membrane detection mechanism as described above. The membrane coating method further includes: acquiring the weight and humidity of the membrane to be tested using the membrane detection mechanism; and adjusting the drying parameters of the coating apparatus based on the weight and humidity. Therefore, this embodiment can simultaneously test the weight and humidity of the membrane to be tested, thereby allowing adjustment of the drying parameters of the coating apparatus based on the weight and humidity to ensure that the membrane to be tested meets preset requirements upon shipment.

[0017] In some embodiments, the coating apparatus further includes an appearance inspection mechanism and a worktable. The step of adjusting the drying parameters of the coating apparatus based on weight and humidity includes: acquiring the appearance information of the film to be tested on the worktable using the appearance inspection mechanism; acquiring the dry film weight of the film to be tested based on weight and humidity; determining whether the film to be tested has defects based on the appearance information; if defects exist, acquiring the defect type based on the defects, and adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight. Therefore, this embodiment can acquire the appearance information, weight, and humidity of the film to be tested, and adjust the drying parameters of the coating apparatus based on these three factors, thereby improving the film yield of the coating apparatus.

[0018] In some embodiments, the step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: controlling the coating apparatus to stop operating in response to any or any combination of the defect types of scraping, bubbles, and coating leaks. Thus, controlling the coating apparatus to stop operating when the defect types are any or any combination of scraping, bubbles, and coating leaks can reduce the loss of the test film caused by scraping, bubbles, or coating leaks.

[0019] In some embodiments, the step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: in response to a defect type of film width being too large or too small, adjusting the width of the film to be tested to achieve a preset film width while keeping the difference between the dry film weight and the preset target weight less than a preset difference. This allows the film to be tested in the coating apparatus to meet the preset film width requirement, thereby improving the film yield of the coating apparatus.

[0020] In some embodiments, the coating apparatus further includes an oven mechanism, and the drying parameters include the temperature and airflow frequency of the oven mechanism. The step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: in response to a defect type of cracking and / or wrinkling, reducing the temperature and / or airflow frequency of the oven mechanism while keeping the difference between the dry film weight and a preset target weight less than a preset difference. Therefore, when the defect type is cracking and / or wrinkling, reducing the temperature and / or airflow frequency of the oven mechanism can reduce the loss of the film under test due to cracking and / or wrinkling.

[0021] In some embodiments, the coating apparatus further includes a coating mechanism, and the drying parameters include the pump speed of the coating mechanism. The step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: adjusting the pump speed to achieve the preset target weight in response to a difference between the dry film weight and a preset target weight that is greater than or equal to a preset difference. This allows the films to be tested by the coating apparatus to meet the preset target weight requirement, thereby improving the film yield of the coating apparatus.

[0022] In some embodiments, the film coating method further includes: in response to the fact that the number of times the drying parameters of the coating apparatus are adjusted exceeds a preset threshold and the film under test still has defects, controlling the coating apparatus to stop working and issuing an alarm. This can reduce the loss of the film under test caused by design issues and lower costs.

[0023] Unlike existing technologies, the membrane testing mechanism of this application includes: a housing assembly, a weighing assembly, a humidity measuring element, and an isolating element. The housing assembly forms a measuring cavity for placing the membrane to be tested. The weighing assembly is installed on the housing assembly and is used to obtain the weight of the membrane to be tested. The humidity measuring element is installed on the housing assembly and is used to obtain the humidity of the membrane to be tested. The housing assembly includes two housings, which are spaced apart to form the measuring cavity. The weighing assembly includes a transmitter and a receiver, which are respectively disposed on the two housings. The humidity measuring element is disposed on one of the housings. The isolating element is disposed on the housing with the humidity measuring element and is located between the humidity measuring element and the transmitter or receiver on the same housing. Through the above methods, the membrane testing mechanism of this application can simultaneously detect and obtain the weight and humidity of the membrane under test, which can improve the efficiency of confirming the dry film quality of the membrane under test, thereby reducing the risk of the membrane under test having uneven surfaces. Moreover, this method can improve the integration of the membrane testing mechanism and improve the measurement accuracy. In addition, by installing the weighing component and the humidity measuring component on a housing, the humidity and weight of the membrane under test at the same location can be tested, which is convenient for subsequent calculation of the dry film quality of the membrane under test. Furthermore, by placing the isolation component between the humidity measuring component and the transmitter or receiver on the same housing, the signal interference between the humidity measuring component and the transmitter or receiver can be further reduced, thereby improving the accuracy of the obtained weight and humidity. [Attached Image Description]

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the technical solutions of this application.

[0025] Figure 1 is a side view of an embodiment of the membrane testing mechanism of this application;

[0026] Figure 2 is a front view of an embodiment of the membrane testing mechanism of this application;

[0027] Figure 3 is a top view of an embodiment of the membrane testing mechanism of this application;

[0028] Figure 4 is a schematic diagram of the structure of an embodiment of the coating apparatus of this application;

[0029] Figure 5 is a schematic flowchart of the first embodiment of the film coating method of this application;

[0030] Figure 6 is a schematic flowchart of the second embodiment of the film coating method of this application.

[0031] Labeling: 100, 10, 11, 12, 13, 30, 31, 32, 20, 40, 50, 60, 70, 20, 21, 22, 23, 23, 23, 23, 23, 23, 23, 24, 25, 26, 27, 24, 25, 26, 27, 27, 24, 25, 26, 27, 28.

Detailed Implementation Methods

[0032] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0038] Currently, considering market development prospects and application trends, batteries have been widely used in various fields due to their advantages such as high energy density, high power density, high cycle life, and long storage time. These include applications in various energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, as well as providing power for high-power devices such as electric bicycles, electric motorcycles, and electric vehicles, and in multiple fields such as military equipment and aerospace.

[0039] As an energy storage power source, a battery includes end caps, a casing, electrode assemblies, and other functional components. The electrode assembly is the part of the battery cell where electrochemical reactions occur. The electrode assembly is mainly formed by winding positive and negative electrode plates, and a separator is usually provided between the positive and negative electrode plates.

[0040] Therefore, before battery production, the battery electrodes need to be coated to form a film. Existing coating equipment can be used for electrode coating, but its film inspection mechanism only monitors film appearance and weight, and cannot obtain film humidity. Consequently, it cannot promptly confirm the dry film weight, leading to the risk of uneven coating. Uneven coating can cause film run-through, potentially resulting in lithium plating inside the battery. Furthermore, existing coating equipment requires manual oven adjustment by employees, which introduces a time lag.

[0041] To address the aforementioned problems, this application first proposes a membrane testing mechanism. Please refer to Figures 1 to 3. Figure 1 is a side view of an embodiment of the membrane testing mechanism of this application; Figure 2 is a front view of an embodiment of the membrane testing mechanism of this application; and Figure 3 is a top view of an embodiment of the membrane testing mechanism of this application. As shown in Figures 1 to 3, the membrane testing mechanism 100 of this embodiment includes a housing assembly 10, a weighing assembly 30, a humidity measuring element 20, and an insulating element 40.

[0042] The housing assembly 10 forms a measuring cavity 13 for setting the membrane to be tested; the weight measuring component 30 is installed on the housing assembly 10 and is used to obtain the weight of the membrane to be tested; the humidity measuring component 20 is installed on the housing assembly 10 and is used to obtain the humidity of the membrane to be tested.

[0043] As shown in Figure 1, the housing assembly 10 is provided with a measuring cavity 13 as shown in Figure 1. When the membrane to be tested is transmitted through the measuring cavity 13, the weighing component 30 and the humidity measuring component 20 are disposed on the housing assembly 10 and can simultaneously detect the membrane to be tested, thereby obtaining the humidity and weight of the membrane at the same position.

[0044] In this embodiment, the housing assembly 10 includes two housings, which are spaced apart to form a measuring cavity 13; the weighing assembly 30 includes a transmitter 31 and a receiver 32, which are respectively disposed on the two housings, and the humidity measuring element 20 is disposed on one of the housings.

[0045] As shown in Figure 1, the housing assembly 10 includes two housings, namely a first housing 11 and a second housing 12. The first housing 11 is disposed on one side of the membrane to be tested, and the second housing 12 is disposed on the other side of the membrane to be tested. The interval between the first housing 11 and the second housing 12 is the measuring cavity 13. When the membrane to be tested is conveyed through the measuring cavity 13, the weighing component 30 and the humidity measuring component 20 can simultaneously detect one position of the membrane to be tested, thereby obtaining the humidity and weight of the membrane at the same position.

[0046] As shown in Figures 1 and 2, the transmitter 31 and the humidity measuring element 20 are mounted on the first housing 11. The test end faces of the transmitter 31 and the humidity measuring element 20 are both located on the side of the first housing 11 near the membrane to be tested. The receiver 32 is mounted on the second housing 12. The receiving end face of the receiver 32 is located on the side of the second housing 12 near the membrane to be tested.

[0047] In other embodiments, the transmitter 31 may be disposed on the first housing 11, and the receiver 32 and the humidity measuring element 20 may be disposed on the second housing 12.

[0048] In this embodiment, the insulating member 40 is disposed on the housing with the humidity measuring member 20, and is located between the humidity measuring member 20 and the transmitter 31 or receiver 32 on the same housing.

[0049] As shown in Figures 1 to 3, the insulating element 40 is disposed on the first housing 11 and located between the humidity measuring element 20 and the transmitting element 31, in order to reduce signal interference and temperature interference between the humidity measuring element 20 and the transmitting element 31.

[0050] In other embodiments, as described above, if the humidity measuring element 20 is disposed on the second housing 12, it also needs to be spaced apart from the receiving element 32, and the insulating element 40 needs to be disposed between the humidity measuring element 20 and the receiving element 32.

[0051] In the above scheme, this embodiment can simultaneously detect and acquire the weight and humidity of the membrane under test through the membrane detection mechanism 100, which can improve the efficiency of confirming the dry film quality of the membrane under test, thereby reducing the risk of uneven distribution of the membrane under test. Furthermore, this method can improve the integration of the membrane detection mechanism and increase measurement accuracy. In addition, mounting the weighing component 30 and the humidity measuring component 20 on a single housing allows for testing the humidity and weight of the membrane under test at the same location, facilitating subsequent calculation of the dry film quality. Moreover, this embodiment also places the insulating component 40 between the humidity measuring component 20 and the transmitter 31 or receiver 32 on the same housing, which can further reduce signal interference between the humidity measuring component 20 and the transmitter 31 or receiver 32, improving the accuracy of the acquired weight and humidity.

[0052] In some embodiments, the transmitter 31 and receiver 32 are arranged overlappingly along the arrangement direction of the two housings, and the humidity measuring element 20 and the transmitter 31 or receiver 32 located on the same housing are arranged at intervals.

[0053] As shown in Figures 1 to 3, the transmitter 31 and receiver 32 are arranged overlappingly along the arrangement direction of the first housing 11 and the second housing 12. As shown in Figures 1 and 3, the humidity measuring element 20 and the transmitter 31 located on the first housing 11 are arranged at intervals. In other embodiments, if the humidity measuring element 20 is located on the second housing 12, the humidity measuring element 20 and the receiver 32 also need to be arranged at intervals.

[0054] In the above scheme, the overlapping arrangement of the transmitter 31 and receiver 32 along the arrangement direction of the two housings is beneficial for the receiver 32 to receive the transmitted signal of the transmitter 31 penetrating the membrane under test, which can improve the efficiency of the weighing assembly 30 in testing the weight of the membrane under test. The interval arrangement of the humidity measuring element 20 and the transmitter 31 or receiver 32 can reduce the signal interference between them.

[0055] In some embodiments, the membrane detection mechanism 100 further includes a temperature sensor 50, which is disposed on the insulating member 40 and is used to obtain the temperature of the membrane to be tested.

[0056] As shown in Figure 1, a temperature sensor 50 can also be provided on the insulating member 40. The temperature sensor 50 is used to obtain the temperature of the diaphragm under test. The test end face of the temperature sensor 50 is located on the side of the housing assembly 10 near the diaphragm under test.

[0057] In the above scheme, the temperature sensor 50 can obtain the temperature of the diaphragm to be tested, thereby reducing the interference of temperature on the weighing component and the humidity measuring component 20.

[0058] In some embodiments, a first guide rail 60 and a second guide rail 70 are respectively provided on the two housings, and the extending directions of the first guide rail 60 and the second guide rail 70 are perpendicular to the transmission direction and the arrangement direction of the diaphragm to be tested.

[0059] As shown in Figures 1 to 3, two first guide rails 60 are respectively provided on both sides of the first housing 11, and two second guide rails 70 are also respectively provided on both sides of the second housing 12. The shapes of the first guide rails 60 and the second guide rails 70 are not limited to those shown in the figures.

[0060] In the above scheme, the first guide rail 60 and the second guide rail 70 can enable the membrane detection mechanism 100 to move in coordination with other mechanisms. In addition, setting the extension direction of the first guide rail 60 and the second guide rail 70 to be perpendicular to the transmission direction and arrangement direction of the membrane to be tested can facilitate the membrane detection mechanism 100 to detect the membrane to be tested at any position on the worktable.

[0061] In some embodiments, the weighing component 30 includes a surface density meter component; and / or the moisture measuring component 20 includes a moisture meter.

[0062] That is, in this embodiment, the weighing component 30 can be configured as a surface density meter component, and / or the moisture measuring component 20 can be configured as a moisture meter.

[0063] In the above scheme, setting the weight measuring component 30 as a surface density meter component can improve the accuracy of obtaining the weight of the membrane to be tested, and setting the humidity measuring component 20 as a moisture meter can improve the accuracy of obtaining the humidity of the membrane to be tested.

[0064] In some embodiments, as shown in Figures 1 to 3, the membrane detection mechanism 100 of this embodiment includes a housing assembly 10, a weighing assembly 30, a humidity measuring element 20, an insulating element 40, and a temperature sensor 50.

[0065] The housing assembly 10 forms a measuring cavity 13 for placing the membrane to be tested; a weighing assembly 30 is mounted on the housing assembly 10 and is used to acquire the weight of the membrane to be tested; a humidity measuring element 20 is mounted on the housing assembly 10 and is used to acquire the humidity of the membrane to be tested. The housing assembly 10 includes two housings, which are spaced apart to form the measuring cavity 13; the weighing assembly 30 includes a transmitter 31 and a receiver 32, which are respectively disposed on the two housings, and the humidity measuring element 20 is disposed on one of the housings. The transmitter 31 and the receiver 32 are overlapped along the arrangement direction of the two housings, and the humidity measuring element 20 and the transmitter 31 or receiver 32 on the same housing are spaced apart. An isolating element 40 is disposed on the housing where the humidity measuring element 20 is located, and is located between the humidity measuring element 20 and the transmitter 31 or receiver 32 on the same housing. A temperature sensor 50 is disposed on the isolating element 40 and is used to acquire the temperature of the membrane to be tested. In this embodiment, a first guide rail 60 and a second guide rail 70 are respectively provided on the two housings. The extension direction of the first guide rail 60 and the second guide rail 70 is perpendicular to the transmission direction and arrangement direction of the diaphragm to be tested.

[0066] The weighing component 30 includes a surface density meter component; and / or the moisture measuring component 20 includes a moisture meter.

[0067] Furthermore, the beneficial effects of the membrane detection mechanism 100 in this embodiment are as described above and will not be repeated here.

[0068] This application further proposes a coating apparatus. Please refer to FIG4. FIG4 is a structural schematic diagram of an embodiment of the coating apparatus of this application. As shown in FIG4, the coating apparatus 200 of this embodiment includes a film detection mechanism 100, an oven mechanism 250 and a control mechanism 240 of any of the above embodiments.

[0069] The oven mechanism 250 is used to dry the membrane to be tested; the membrane detection mechanism 100 is used to obtain the weight and humidity of the membrane to be tested output from the oven mechanism 250; the control mechanism 240 is communicatively connected to the oven mechanism 250 and the membrane detection mechanism 100 respectively, and is used to process the weight and humidity to obtain control signals, and use the control signals to control the oven mechanism 250.

[0070] In this embodiment, after the membrane detection mechanism 100 obtains the weight and humidity of the membrane to be tested, it sends the weight and humidity of the membrane to be tested to the control mechanism 240. If a temperature sensor 50 is provided in the membrane detection mechanism 100, the membrane detection mechanism 100 can also send the temperature, weight and humidity to the control mechanism 240. After obtaining the weight, humidity and temperature of the membrane to be tested, the control mechanism 240 can process and analyze them to obtain the dry film quality of the membrane to be tested, and generate a control signal based on the dry film quality. The control mechanism 240 can send the control signal to the drying oven mechanism 250 to adjust the drying oven mechanism 250 so that the membrane to be tested after being dried by the drying oven mechanism 250 meets the preset requirements.

[0071] Therefore, the coating apparatus 200 of this embodiment can process the weight and humidity to obtain the dry film quality of the film to be tested, and generate a control signal, thereby controlling the oven mechanism 250 by using the control signal. This enables intelligent control of the oven mechanism 250 without manual adjustment, thereby reducing the loss caused by defects in the film to be tested.

[0072] In some embodiments, the coating apparatus 200 further includes an unwinding mechanism 220, a winding mechanism 270, and a worktable 210; the film detection mechanism 100, the unwinding mechanism 220, the winding mechanism 270, and the drying oven mechanism 250 are all connected to the worktable 210, and the drying oven mechanism 250 is disposed between the unwinding mechanism 220 and the winding mechanism 270; the film detection mechanism 100 is disposed between the drying oven mechanism 250 and the winding mechanism 270; wherein, the unwinding mechanism 220 is used to release the film to be tested onto the worktable 210; and the winding mechanism 270 is used to wind up the dried film to be tested.

[0073] As shown in Figure 4, in this embodiment, the coating apparatus 200 further includes an unwinding mechanism 220, a winding mechanism 270, and a worktable 210. The unwinding mechanism 220, the winding mechanism 270, and the drying oven mechanism 250 are all connected to the worktable 210. The working process of the coating apparatus 200 is as follows: By controlling the unwinding mechanism 220 to start working, the unwinding mechanism 220 can drive the rotating wheel to start working, causing the substrate (e.g., electrode sheet) on the rotating wheel to begin moving on the worktable 210. After the substrate is coated, the substrate coated with the film to be tested is conveyed to the drying oven mechanism 250, where the drying oven mechanism 250 dries the substrate coated with the film to be tested. After drying, the substrate with the film to be tested is wound up by the winding wheel in the winding mechanism 270. The film detection mechanism 100 is located between the drying oven mechanism 250 and the winding mechanism 270.

[0074] In the above scheme, placing the film detection mechanism 100 between the oven mechanism 250 and the winding mechanism 270 enables the film detection mechanism 100 to detect the film to be tested after it has been dried by the oven mechanism 250 in a timely manner, and enables the control mechanism 240 to adjust the oven mechanism 250 in a timely manner, thereby reducing the loss of the film to be tested.

[0075] In some embodiments, the coating apparatus 200 further includes an appearance inspection mechanism 260, which is disposed between the oven mechanism 250 and the film inspection mechanism 100, and is used to acquire appearance information of the film to be tested on the worktable 210; wherein, the control mechanism 240 is also communicatively connected to the appearance inspection mechanism 260, and the control mechanism 240 is also used to process the appearance information to obtain the defect type, and use the defect type and control signal to control the oven mechanism 250.

[0076] As shown in Figure 4, the coating apparatus 200 in this embodiment also includes an appearance inspection mechanism 260. The appearance inspection mechanism 260 is disposed between the oven mechanism 250 and the film inspection mechanism 100. In this embodiment, the appearance inspection device can be configured as a camera device to photograph the film to be tested moving on the worktable 210 to obtain its appearance information. The appearance inspection mechanism 260 is also communicatively connected to the control mechanism 240. The appearance inspection mechanism 260 can send the appearance information of the film to be tested, which has been dried by the oven mechanism 250, to the control mechanism 240. The control mechanism 240 can analyze and process the appearance information to obtain the defect type of the film to be tested. Then, the control mechanism 240 can adjust the oven mechanism 250 using the defect type and control signals, thereby eliminating the defects of the film to be tested after drying by the oven mechanism 250.

[0077] In other embodiments, the appearance inspection mechanism 260 may analyze and process the appearance information to obtain the defect type and send the defect type to the control mechanism 240. Furthermore, after the appearance inspection mechanism 260 or the control mechanism 240 obtains the defect type of the diaphragm under test, an alarm needs to be triggered so that the staff are aware that the diaphragm under test passing through the oven mechanism 250 has a defect.

[0078] In the above scheme, placing the film detection mechanism 100 between the oven mechanism 250 and the winding mechanism 270 enables the film detection mechanism 100 to detect the film to be tested after it has been dried by the oven mechanism 250 in a timely manner, and enables the control mechanism 240 to adjust the oven mechanism 250 in a timely manner, thereby reducing the loss of the film to be tested.

[0079] In some embodiments, the coating apparatus 200 further includes a coating mechanism 230, which is connected to the worktable 210 and disposed between the unwinding mechanism 220 and the drying oven mechanism 250. The coating mechanism 230 is used to perform coating operations. The control mechanism 240 is also communicatively connected to the coating mechanism 230 and is also used to control the coating mechanism 230 based on control signals.

[0080] As shown in Figure 4, the coating mechanism 230 is connected to the worktable 210 and is disposed between the unwinding mechanism 220 and the drying oven mechanism 250. As mentioned above, the coating mechanism 230 is used to coat the substrate on the worktable 210; in addition, in this embodiment, the control mechanism 240 can also be communicatively connected to the coating mechanism 230 to control the coating mechanism 230 based on control signals.

[0081] In the above scheme, the control mechanism 240 can obtain the dry film quality of the film to be tested based on weight and humidity, and generate a control signal based on the dry film quality. If the dry film quality of the film to be tested does not meet the standard, the control mechanism 240 can adjust the coating mechanism 230 in time, thereby reducing the loss caused by the dry film quality not meeting the standard.

[0082] In some embodiments, the coating mechanism 230 includes a coating tank assembly 231 and a screw pump assembly 232. The coating tank assembly 231 is used to store coating, and the screw pump assembly 232 is connected to the coating tank assembly 231 and is used to coat the test film.

[0083] As shown in Figure 4, the coating mechanism 230 includes a coating tank assembly 231 and a screw pump assembly 232. The coating tank assembly 231 is used to store coating. The screw pump assembly 232 typically consists of a central shaft (screw pump shaft) and one or more blades. The screw pump assembly 232 uses the rotation and movement of the blades to draw coating from the coating tank assembly 231 using centrifugal force, torsional force, and the establishment of a sealed space, and then sprays the coating through nozzles, thereby achieving the purpose of coating the substrate.

[0084] That is, in the above scheme, this embodiment can adjust the weight of the diaphragm to be tested by controlling the pumping speed of the screw pump assembly 232.

[0085] In one embodiment, as shown in FIG4, the coating apparatus 200 of this embodiment includes a film inspection mechanism 100, a worktable 210, an unwinding mechanism 220, a coating mechanism 230, a control mechanism 240, an oven mechanism 250, an appearance inspection mechanism 260, and a winding mechanism 270, as described in any of the above embodiments.

[0086] The film inspection mechanism 100, unwinding mechanism 220, coating mechanism 230, oven mechanism 250, appearance inspection mechanism 260, and winding mechanism 270 are all connected to the worktable 210. The oven mechanism 250 is located between the unwinding mechanism 220 and the winding mechanism 270 and is used to dry the film to be tested. The film inspection mechanism 100 is located between the oven mechanism 250 and the winding mechanism 270 and is used to obtain the weight and humidity of the film to be tested output from the oven mechanism 250. The unwinding mechanism 220 is used to transport the film to be tested on the worktable 210. The winding mechanism 270 is used to wind the film to be tested. The appearance inspection mechanism 260 is located between the oven mechanism 250 and the film inspection mechanism 100 and is used to obtain the appearance information of the film to be tested on the worktable 210.

[0087] The control mechanism 240 is communicatively connected to the oven mechanism 250, the appearance inspection mechanism 260, and the membrane inspection mechanism 100. The control mechanism 240 is used to process the appearance information to obtain the defect type, and to process the weight and humidity to obtain the control signal. Finally, the control mechanism 240 is controlled by the defect type and the control signal.

[0088] The control mechanism 240 is also in communication with the coating mechanism 230 and is also used to control the coating mechanism 230 based on control signals.

[0089] As shown in Figure 4, the coating mechanism 230 includes a coating tank assembly 231 and a screw pump assembly 232. The coating tank assembly 231 is used to store coatings, and the screw pump assembly 232 is connected to the coating tank assembly 231 and is used to coat the membrane to be tested.

[0090] Furthermore, the beneficial effects of the coating apparatus 200 in this embodiment are as described above and will not be repeated here.

[0091] This application also provides a film coating method, which can be applied to the coating apparatus 200 of the above embodiments. Please refer to FIG5, which is a schematic flowchart of the first embodiment of the film coating method of this application. As shown in FIG5, the film coating method of this embodiment specifically includes steps S101 to S102: Step S101: Obtain the weight and humidity of the film to be tested using a film detection mechanism. Step S102: Adjust the drying parameters of the coating apparatus based on the weight and humidity.

[0092] In this embodiment, the weight and humidity of the film to be tested at the same position can be obtained by the film detection mechanism 100 shown in Figures 1 to 3, and then the weight and humidity of the film to be tested at the same position can be received by the control mechanism 240 of the coating device 200 shown in Figure 4. The dry film quality of the film to be tested can be obtained by using the weight and humidity, and the drying parameters of the coating device 200 can be adjusted based on the dry film quality.

[0093] In the above scheme, this embodiment can simultaneously test the weight and humidity of the film to be tested, thereby adjusting the drying parameters of the coating device 200 based on the weight and humidity so that the film to be tested meets the preset requirements when it is shipped.

[0094] In some embodiments, the step of adjusting the drying parameters of the coating apparatus based on weight and humidity includes: obtaining the appearance information of the film to be tested on the worktable using an appearance inspection mechanism; obtaining the dry film weight of the film to be tested based on weight and humidity; determining whether there are defects in the film to be tested based on the appearance information; if there are defects, obtaining the defect type based on the defect, and adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight.

[0095] In this embodiment, the appearance information of the film to be tested on the worktable 210 can be obtained by the appearance inspection mechanism 260 as shown in Figure 4. The control mechanism 240 can acquire and analyze the appearance information to obtain the defect type. In addition, the control mechanism 240 can also obtain the dry film weight of the film to be tested based on weight and humidity, as described above. If the film to be tested has defects, the control mechanism 240 can adjust the drying parameters of the coating device 200 based on the current defect type and dry film quality. The specific adjustment method is described below.

[0096] In the above scheme, this embodiment can obtain the appearance information, weight and humidity of the film to be tested, and adjust the drying parameters of the coating device 200 based on the three, thereby improving the film delivery rate of the coating device 200.

[0097] In some embodiments, the step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: controlling the coating apparatus to stop operating in response to any one or any combination of the defect types of scraping, bubbles, and coating leaks.

[0098] If the control mechanism 240 analyzes that the defect type of the film to be tested is any one or any combination of scratches, bubbles and coating leaks, it means that there is a major problem with the coating device 200. If adjusting the drying parameters cannot solve the above defects, the coating device 200 needs to be stopped and the coating device 200 needs to be improved and adjusted before it can continue to work.

[0099] In the above scheme, when the defect type is any one or any combination of scratches, bubbles, and coating leaks, the coating device 200 is stopped, which can reduce the loss of the test film caused by scratches, bubbles, or coating leaks.

[0100] In some embodiments, the step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: in response to the defect type being that the film width is too large or too small, adjusting the width of the film to be tested to achieve the preset film width while keeping the difference between the dry film weight and the preset target weight less than the preset difference.

[0101] If the control mechanism 240 analyzes and determines that the defect type of the test diaphragm is that the membrane width is too large or too small, the width of the test diaphragm needs to be adjusted to reach the preset membrane width. During the adjustment process, it is necessary to ensure that the dry film quality of the test diaphragm remains unchanged. That is, while adjusting the width of the test diaphragm to reach the preset membrane width, the difference between the dry film weight and the preset target weight needs to be less than a preset difference. The preset difference can be set based on the actual situation.

[0102] In the above scheme, the film to be tested by the coating device 200 can meet the preset film width requirements, thereby improving the film output rate of the coating device 200.

[0103] In some embodiments, the drying parameters include the temperature and air frequency of the oven mechanism, and the step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: in response to the defect type being cracking and / or wrinkling, reducing the temperature and / or air frequency of the oven mechanism while keeping the difference between the dry film weight and the preset target weight less than a preset difference.

[0104] If the control mechanism 240 analyzes that the defect type of the test film is cracking and / or wrinkling, it means that the temperature and / or air frequency of the current oven mechanism 250 is too high, causing the test film to crack or wrinkle. At this time, the control mechanism 240 needs to reduce the temperature and / or air frequency of the oven mechanism 250 while keeping the difference between the dry film weight and the preset target weight less than the preset difference.

[0105] In the above scheme, when the defect type is cracking and / or wrinkling, reducing the temperature and / or air frequency of the oven mechanism 250 can reduce the loss of the diaphragm under test caused by cracking and / or wrinkling.

[0106] In some embodiments, the drying parameters further include the pump speed of the coating mechanism, and the step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: adjusting the pump speed to make the dry film weight reach the preset target weight in response to the difference between the dry film weight and the preset target weight being greater than or equal to the preset difference.

[0107] If the difference between the dry film quality obtained by the control mechanism 240 based on weight and humidity analysis and the preset target weight is greater than or equal to the preset difference, it means that the dry film quality of the film to be tested does not meet the shipping requirements. At this time, the control mechanism 240 needs to adjust the pumping speed of the screw pump assembly 232 in the coating mechanism 230 so that the dry film weight reaches the preset target weight.

[0108] In the above solution, this embodiment can make the film to be tested of the coating device 200 meet the preset target weight requirements, thereby improving the film delivery rate of the coating device 200.

[0109] In the above embodiment of the drying parameters of the coating device 200, after the control mechanism 240 adjusts the parameters and the defects of the film to be tested disappear, the control mechanism 240 will issue an alarm to remind the operator that the coating device 200 has been automatically adjusted.

[0110] In some embodiments, the film coating method further includes: in response to the fact that the number of times the drying parameters of the coating device are adjusted is greater than a preset threshold and the film under test still has defects, controlling the coating device to stop working and issuing an alarm.

[0111] As mentioned earlier, when the control mechanism 240 adjusts the drying parameters of the coating device 200, there may be cases of over-adjustment or under-adjustment. In such cases, multiple adjustments are required to eliminate the defects in the film under test. If, after multiple adjustments, the appearance inspection mechanism 260 or the control mechanism 240 still finds defects in the film under test, meaning the number of times the drying parameters of the coating device 200 have been adjusted exceeds a preset threshold and the film under test still has defects, it indicates that the current defects cannot be improved by adjusting the drying parameters. In this case, the coating device 200 needs to be stopped, and an alarm should be triggered to prompt the operator for an improvement plan. In this embodiment, the preset threshold for adjusting the coating device 200 is set to 3 times. In other embodiments, the preset threshold can be set based on actual conditions.

[0112] In the above solution, the film coating method of this embodiment can reduce the loss of the film under test caused by the problem of the solution and reduce the cost.

[0113] Please refer to Figure 6, which is a schematic flowchart of the second embodiment of the film coating method of this application. As shown in Figure 6, the film coating method of this embodiment specifically includes steps S201 to S206:

[0114] Step S201: Obtain the weight and humidity of the membrane to be tested using a membrane testing mechanism.

[0115] In this embodiment, the weight and humidity of the film to be tested at the same position can be obtained by the film detection mechanism 100 shown in Figures 1 to 3, and the weight and humidity of the film to be tested can be sent to the control mechanism 240 of the coating device 200 shown in Figure 4. If the film detection mechanism 100 is also equipped with a temperature sensor 50, the temperature of the film to be tested also needs to be sent to the control mechanism 240.

[0116] Step S202: Use the appearance inspection mechanism to obtain the appearance information of the diaphragm to be tested on the worktable.

[0117] In this embodiment, the appearance information of the diaphragm to be tested on the workbench 210 can be obtained by the appearance inspection mechanism 260 as shown in Figure 4, and the appearance information can be sent to the control mechanism 240.

[0118] Step S203: Obtain the dry film weight of the membrane to be tested based on weight and humidity.

[0119] The control mechanism 240 can calculate the dry film weight of the membrane under test based on the weight and humidity of the membrane under test. If the membrane detection mechanism 100 sends the temperature of the membrane under test to the control mechanism 240, the control mechanism 240 can calculate the dry film weight of the membrane under test based on the weight, humidity and temperature of the membrane under test.

[0120] Step S204: Determine whether the diaphragm to be tested has defects based on the appearance information.

[0121] The control mechanism 240 also acquires the appearance information of the diaphragm under test. At this time, the control mechanism 240 can analyze the appearance information to determine whether there are defects in the diaphragm under test.

[0122] If a defect exists, proceed to step S205.

[0123] Step S205: Obtain the defect type based on the defect, and adjust the drying parameters of the coating device based on the defect type and the dry film weight.

[0124] The drying parameters include the temperature and air frequency of the oven mechanism 250 and the pump speed of the coating mechanism 230.

[0125] If the control mechanism 240 analyzes that the defect type of the film under test is any one or a combination of scratching, bubbles, and coating leakage, it indicates that there is a significant problem with the coating device 200. In this case, the coating device 200 needs to be stopped and improved before it can resume operation. If the control mechanism 240 analyzes that the defect type of the film under test is that the film width is too large or too small, the width of the film under test needs to be adjusted to reach the preset width. During the adjustment process, the dry film quality of the film under test must be maintained. If the control mechanism 240 analyzes that the defect type of the film under test is cracking and / or wrinkling, it indicates that the current drying process... If the temperature and / or airflow frequency of the oven mechanism 250 are too high, causing the film to crack or wrinkle, the control mechanism 240 needs to reduce the temperature and / or airflow frequency of the oven mechanism 250 while keeping the difference between the dry film weight and the preset target weight less than the preset difference. If the difference between the dry film quality obtained by the control mechanism 240 based on weight and humidity analysis and the preset target weight is greater than or equal to the preset difference, it means that the dry film quality of the current film to be tested does not meet the shipping requirements. In this case, the control mechanism 240 needs to adjust the pump speed of the screw pump assembly 232 in the coating mechanism 230 so that the dry film weight reaches the preset target weight.

[0126] After the control mechanism 240 is adjusted and the defects of the film under test disappear, the control mechanism 240 will issue an alarm to remind the staff that the coating device 200 has been automatically adjusted.

[0127] Step S206: In response to the fact that the number of times the drying parameters of the coating device are adjusted exceeds the preset threshold and the film under test still has defects, the coating device is controlled to stop working and an alarm is issued.

[0128] When the control mechanism 240 adjusts the drying parameters of the coating device 200, there may be cases of over-adjustment or under-adjustment. In such cases, multiple adjustments are required to eliminate the defects in the film under test. If the visual inspection mechanism 260 or the control mechanism 240 still finds defects in the film under test after multiple adjustments by the control mechanism 240, that is, the number of times the drying parameters of the coating device 200 have been adjusted exceeds the preset threshold and the film under test still has defects, it means that the current defects cannot be improved by adjusting the drying parameters. In this case, the coating device 200 needs to be stopped, an alarm should be triggered, and the operator should be prompted with an improvement plan.

[0129] Furthermore, the beneficial effects of the film coating method in this embodiment are as described above and will not be repeated here.

[0130] In the several embodiments provided in this application, it should be understood that the disclosed methods and apparatus can be implemented in other ways. For example, the apparatus implementations described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, units or components may be combined or integrated into another subsystem, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0131] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A membrane testing mechanism, wherein, The membrane testing mechanism includes: The housing assembly forms a measuring cavity for setting the diaphragm to be tested; A weighing component is installed on the housing assembly and is used to obtain the weight of the diaphragm to be tested; A humidity measuring element is installed on the housing assembly and is used to acquire the humidity of the membrane to be tested; The housing assembly includes two housings, which are spaced apart to form the measuring cavity; the weighing assembly includes a transmitter and a receiver, which are respectively disposed on the two housings, and the humidity measuring element is disposed on one of the housings. An isolating element is disposed on the housing on which the humidity measuring element is provided, and is located between the humidity measuring element and the transmitter or the receiver on the same housing.

2. The membrane testing mechanism according to claim 1, wherein, The transmitter and the receiver are arranged overlappingly along the arrangement direction of the two housings, and the humidity measuring element and the transmitter or the receiver located on the same housing are arranged at intervals.

3. The membrane testing mechanism according to claim 1 or 2, wherein, The membrane detection mechanism further includes a temperature sensor, which is disposed on the insulating member and is used to obtain the temperature of the membrane to be tested.

4. The membrane testing mechanism according to claim 2, wherein, The two housings are respectively provided with a first guide rail and a second guide rail, and the extension direction of the first guide rail and the second guide rail is perpendicular to the transmission direction of the diaphragm to be tested and the arrangement direction.

5. The membrane testing mechanism according to any one of claims 1-4, wherein, The weighing component includes a surface density meter component; and / or the moisture measuring component includes a moisture meter.

6. A coating apparatus, wherein, include: The drying oven mechanism is used to dry the membrane to be tested. The membrane testing mechanism according to any one of claims 1-5 is used to obtain the weight and humidity of the membrane to be tested output from the oven mechanism; The control mechanism is communicatively connected to both the oven mechanism and the membrane detection mechanism, and is used to process the weight and humidity to obtain control signals, and to control the oven mechanism using the control signals.

7. The coating apparatus according to claim 6, wherein, The coating apparatus further includes an unwinding mechanism, a winding mechanism, and a worktable; the film detection mechanism, the unwinding mechanism, the winding mechanism, and the oven mechanism are all connected to the worktable, and the oven mechanism is disposed between the unwinding mechanism and the winding mechanism; the film detection mechanism is disposed between the oven mechanism and the winding mechanism. The unwinding mechanism is used to release the test film onto the worktable; the winding mechanism is used to wind up the dried test film.

8. The coating apparatus according to claim 7, wherein, The coating apparatus further includes an appearance inspection mechanism, which is disposed between the oven mechanism and the film inspection mechanism, and is used to obtain the appearance information of the film to be tested on the worktable; The control mechanism is also communicatively connected to the appearance inspection mechanism. The control mechanism is also used to process the appearance information to obtain the defect type, and to control the oven mechanism using the defect type and the control signal.

9. The coating apparatus according to claim 7 or 8, wherein, The coating apparatus further includes a coating mechanism, which is connected to the worktable and disposed between the unwinding mechanism and the drying oven mechanism. The coating mechanism is used to coat the film to be tested on the worktable. The control mechanism is also communicatively connected to the coating mechanism and is used to control the coating mechanism based on the control signal.

10. The coating apparatus according to claim 9, wherein, The coating mechanism includes a coating tank assembly and a screw pump assembly. The coating tank assembly is used to store coatings, and the screw pump assembly is connected to the coating tank assembly for coating operations.

11. A method for coating a film, wherein, Applied to a coating apparatus, the coating apparatus including the film detection mechanism according to any one of claims 1-5, the film coating method comprising: The weight and humidity of the membrane to be tested are obtained using the membrane detection mechanism. The drying parameters of the coating apparatus are adjusted based on the weight and humidity.

12. The film coating method according to claim 11, wherein, The coating apparatus further includes an appearance inspection mechanism and a worktable. The step of adjusting the drying parameters of the coating apparatus based on the weight and the humidity includes: The appearance inspection mechanism is used to obtain the appearance information of the diaphragm to be tested on the worktable. The dry film weight of the test film is obtained based on the weight and the humidity. Based on the appearance information, determine whether the diaphragm under test has defects; If a defect exists, the defect type is obtained based on the defect, and the drying parameters of the coating device are adjusted based on the defect type and the dry film weight.

13. The film coating method according to claim 12, wherein, The step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: In response to any or any combination of the defect types being streaks, bubbles, and coating leaks, the coating device is controlled to stop operating.

14. The film coating method according to claim 12 or 13, wherein, The step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: In response to the defect type being a film width that is too large or too small, the width of the film to be tested is adjusted to achieve the preset film width while keeping the difference between the dry film weight and the preset target weight less than the preset difference.

15. The film coating method according to any one of claims 12-14, wherein, The coating apparatus further includes an oven mechanism, and the drying parameters include the temperature and airflow frequency of the oven mechanism. The step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: In response to the defect type being cracking and / or wrinkling, the temperature and / or airflow frequency of the oven mechanism are reduced while keeping the difference between the dry film weight and the preset target weight less than a preset difference.

16. The film coating method according to any one of claims 12-15, wherein, The coating apparatus further includes a coating mechanism, and the drying parameters further include the pump speed of the coating mechanism. The step of adjusting the drying parameters of the coating apparatus based on the defect type and the dry film weight includes: If the difference between the dry film weight and the preset target weight is greater than or equal to a preset difference, the pump speed is adjusted so that the dry film weight reaches the preset target weight.

17. The film coating method according to any one of claims 12-16, wherein, The film coating method further includes: If the number of times the drying parameters of the coating device are adjusted exceeds a preset threshold and the film under test still has defects, the coating device is controlled to stop working and an alarm is issued.

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