Foil coating device and system

Abstract

The utility model discloses a foil coating device and system, which belongs to the technical field of battery production equipment and comprises a die head, a die head adjusting mechanism, a support mechanism and a detection mechanism, the die head and the supporting mechanism are oppositely arranged on the two sides of the foil, the supporting mechanism is used for supporting and conveying the foil, and the die head is used for coating the foil to form a coating; the detection mechanism is arranged at the downstream of the die head, is positioned on at least one side of the foil and is used for detecting the thickness of the coating or the edge position of the coating on at least one side of the foil; the die head adjusting mechanism is movably connected with the die head and electrically connected with the detection mechanism, and the die head adjusting mechanism adjusts the position of the die head relative to the supporting mechanism according to the thickness of the coating or the edge position of the coating. According to the utility model, the problems that the coating thickness and the edge position are not corrected in time and the coating pressure is not adjusted accurately can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a foil coating device and system. Background Art

[0002] In the foil coating process, precise control of the thickness and edge position of the coating is a key factor in ensuring product quality and production efficiency. If the thickness or edge position of the coating exceeds the preset standard range, the pole piece will be unqualified, which will lead to material waste and increased production costs. Traditional foil coating methods mostly rely on fixed die heads for coating. The accuracy of the coating thickness and edge position depends largely on the personal experience and skills of the operator, as well as the initial configuration of the coating equipment. However, this manual adjustment method is not only inefficient, but also difficult to achieve high-precision control of the coating thickness and edge position, thus affecting the quality and consistency of the product.

[0003] When the edge of the coating falls outside the preset standard range, coating misalignment occurs. Misalignment is primarily affected by two factors: the foil's corrective action and the die's positioning accuracy. Currently, a common solution in the industry is to manually adjust the die's position, but this method often lacks timely response and makes it difficult to effectively control misalignment.

[0004] Furthermore, coating thickness exceeding the preset standard range will also affect the coating's surface density. At the beginning of continuous coating and during intermittent coating, surface density is significantly affected by the pressure in the feeding pipe. Currently, this problem is primarily addressed through manual adjustment of the test piece. This involves recording the coating pressure after 1-2 meters of continuous coating, then manually adjusting the control valve to adjust the pipe pressure to the coating pressure. This method is not only inefficient but also difficult to achieve precise pressure control.

[0005] In view of the above background, designing a foil coating device and system is of great significance to solving the problems existing in the prior art such as untimely correction of coating thickness and edge position and inaccurate adjustment of coating pressure, thereby improving the stability of the coating process and product quality. Utility Model Content

[0006] In response to the above-mentioned problems in the prior art, the present invention provides a foil coating device and system, which aims to solve the problems existing in the prior art such as the untimely correction of coating thickness and edge position, and the inaccurate adjustment of coating pressure. To achieve the above-mentioned objectives, the present invention provides the following technical solutions:

[0007] A foil coating device comprises a die head, a die head adjustment mechanism, a support mechanism and a detection mechanism;

[0008] The die head and the supporting mechanism are arranged on two sides of the foil material opposite to each other, the supporting mechanism is used to support and transport the foil material, and the die head is used to coat the foil material to form a coating;

[0009] The detection mechanism is provided downstream of the die head, and the detection mechanism is located on at least one side of the foil material, and is used to detect the thickness of the coating or the edge position of the coating on at least one side of the foil material;

[0010] The die head adjustment mechanism is movably connected to the die head and electrically connected to the detection mechanism. The die head adjustment mechanism is used to receive signals from the detection mechanism and adjust the position of the die head relative to the support mechanism according to the thickness of the coating or the edge position of the coating.

[0011] Furthermore, the detection mechanism includes a first detection mechanism and a second detection mechanism, and the die head adjustment mechanism is electrically connected to the first detection mechanism and the second detection mechanism respectively. The first detection mechanism is located on one side of the foil material and is used to detect the thickness of the coating on the first side of the foil material or the edge position of the coating; the second detection mechanism is located on the other side of the foil material and is used to detect the thickness of the coating on the second side of the foil material or the edge position of the coating;

[0012] The die head adjustment mechanism adjusts the position of the die head relative to the support mechanism in the first direction according to the thickness of the coating on the first side of the foil material or the thickness of the coating on the second side of the foil material;

[0013] Alternatively, the die head adjustment mechanism adjusts the position of the die head relative to the support mechanism in the second direction according to the edge position of the coating on the first side of the foil or the edge position of the coating on the second side of the foil;

[0014] The first direction is perpendicular to the conveying surface of the foil material, and the second direction is perpendicular to the conveying direction of the foil material and perpendicular to the first direction.

[0015] Furthermore, the die head adjustment mechanism includes a drive motor and a guide rail, the guide rail includes a first guide rail and a second guide rail that are movably connected, the first guide rail extends along the first direction, the second guide rail extends along the second direction, the die head is slidably connected to one of the first guide rail or the second guide rail, and the drive motor drives the die head to slide along the first guide rail or the second guide rail.

[0016] Furthermore, the support mechanism further includes a first deflection corrector, which is disposed upstream of the detection mechanism and is configured to receive a signal from the detection mechanism to correct and position the foil on the support mechanism.

[0017] Furthermore, it also includes an unwinding mechanism, which is arranged upstream of the die head and is used to place a foil material roll and transmit the foil material to the supporting mechanism.

[0018] Furthermore, the unwinding mechanism also includes a second deflection corrector, which is arranged upstream of the detection mechanism. The second deflection corrector is used to receive the signal of the detection mechanism to correct the position of the foil on the unwinding mechanism.

[0019] Furthermore, it also includes a pressure regulating mechanism, which is movably connected to the die head and is used to adjust the initial pressure when the die head applies coating to the foil on the supporting mechanism.

[0020] Furthermore, the pressure regulating mechanism includes a slurry tank, a storage tank and a three-way valve; the three-way valve is provided with a first port, a second port and a third port, the slurry tank is connected to the first port, the storage tank is connected to the second port, and the die head is connected to the third port; a first pressure sensor is provided on the branch between the third port and the die head; a second pressure sensor and a regulating valve are provided on the branch between the second port and the storage tank.

[0021] Furthermore, it includes a first controller and a second controller, wherein the first controller is electrically connected to the detection mechanism and the die adjustment mechanism; and the second controller is electrically connected to the first pressure sensor, the second pressure sensor and the regulating valve.

[0022] A foil coating system comprises the above-mentioned foil coating device.

[0023] The beneficial effects of the utility model are:

[0024] 1. The utility model provides a foil coating device and system that, through the provision of a detection mechanism, can accurately detect the thickness or position information of the foil double-sided coating in real time. Combined with the die adjustment mechanism and the first controller, it achieves automated, high-precision die position adjustment, effectively resolving the issues of delayed response and insufficient precision associated with traditional manual die position adjustment. This significantly improves the efficiency and accuracy of coating thickness and edge position correction during the coating process, reduces the risk of electrode scrapping, and enhances production efficiency and product quality.

[0025] 2. The utility model provides a foil coating device and system, which realizes precise adjustment of the initial pressure of the die head coating by setting a pressure regulating mechanism, including a three-way valve, a first pressure sensor, a second pressure sensor and a regulating valve, in conjunction with the intelligent control of the second controller, thereby ensuring the stability of the surface density during the coating process, especially in the initial stage of continuous coating and the intermittent coating head, effectively reducing the impact of pipeline pressure fluctuations on the coating quality, and improving the uniformity and consistency of the coated product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a foil coating device and system provided by the utility model;

[0027] In the accompanying drawings: 1. die head; 2. die head adjustment mechanism; 3. support mechanism; 4. first detection mechanism; 5. second detection mechanism; 6. first deviation corrector; 7. unwinding mechanism; 8. second deviation corrector; 9. slurry tank; 10. storage tank; 11. three-way valve; 12. first pressure sensor; 13. second pressure sensor; 14. regulating valve. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0029] Example 1:

[0030] See attached Figure 1 . This embodiment provides a foil coating device, which specifically includes a die head 1, a die head adjustment mechanism 2, a support mechanism 3 and a detection mechanism. The die head 1 and the support mechanism 3 are arranged on opposite sides of the foil, wherein the support mechanism 3 is used to stably support and transport the foil. For example, the support mechanism 3 can be a support platform, on which a roller or conveyor belt for foil transportation is provided; the die head 1 has a precise coating function and can evenly coat the foil on the support mechanism 3 to form a coating. The die head 1 is internally provided with a coating nozzle. By adjusting the flow rate and angle of the nozzle, efficient coating of foils of different widths and thicknesses can be achieved. In addition, the foil coating device also includes a detection mechanism, which is arranged downstream of the die head 1 and is located on at least one side of the foil, and is used to detect the thickness of the coating or the edge position of the coating on at least one side of the foil. The foil coating device also includes a die head adjustment mechanism 2, which is movably connected to the die head 1 and electrically connected to the detection mechanism. The die head adjustment mechanism 2 adjusts the position of the die head 1 relative to the support mechanism 3 according to the thickness of the coating or the edge position of the coating.

[0031] The utility model separates the die head 1 frame and sets a die head adjustment mechanism 2. By reading the thickness of the coating or the edge position data of the coating on at least one side of the foil, the die head adjustment mechanism 2 is adjusted to make the die head 1 frame slightly move to ensure the coating effect.

[0032] Example 2:

[0033] See attached Figure 1 Based on the first embodiment, the detection mechanism of this embodiment is arranged downstream of the die head 1 and is located on both sides of the foil. Specifically, the detection mechanism includes a first detection mechanism 4 and a second detection mechanism 5, and the die head adjustment mechanism 2 is electrically connected to the first detection mechanism 4 and the second detection mechanism 5. The first detection mechanism 4 is located on one side of the foil and is used to detect the thickness of the coating on the first side of the foil or the edge position of the coating; the second detection mechanism 5 is located on the other side of the foil and is used to detect the thickness of the coating on the second side of the foil or the edge position of the coating.

[0034] The die adjustment mechanism 2 adjusts the position of the die 1 relative to the support mechanism 3 in the first direction according to the thickness of the coating on the first side of the foil or the thickness of the coating on the second side of the foil detected by the detection mechanism; for example, the first detection mechanism 4 and the second detection mechanism 5 can be infrared sensors, which can accurately measure the thickness of the coating on the two sides and the thickness difference by capturing the reflection of light by the coating on the first side and the second side of the foil, and through data processing algorithm analysis. Alternatively, the die adjustment mechanism 2 adjusts the position of the die 1 relative to the support mechanism 3 in the second direction according to the edge position of the coating on the first side of the foil or the edge position of the coating on the second side of the foil; for example, first ensure that the coating on the first side is centered, and when double-sided coating is applied, the coating on the second side is aligned with the coating on the first side. The first detection mechanism 4 and the second detection mechanism 5 can be CCD sensors, which can accurately measure the edge position deviation of the coating on both sides by capturing the image of the coating edge and through image processing algorithm analysis. The first direction is perpendicular to the conveying surface of the foil, and the second direction is perpendicular to the conveying direction of the foil and perpendicular to the first direction. As Figure 1 As shown, the conveying surface of the foil at the die head is perpendicular to the paper surface, the X direction is the first direction, the Y direction is the conveying direction of the foil at the die head, that is, the second direction is perpendicular to the paper surface formed by the X direction and the Y direction.

[0035] In one embodiment of the present application, the die adjustment mechanism 2 includes a drive motor and a guide rail, wherein the guide rail includes a first guide rail and a second guide rail that are movably connected, the first guide rail extends along the first direction, the second guide rail extends along the second direction, the die 1 is slidably connected to one of the first guide rail or the second guide rail, the drive motor drives the connected die 1, and the drive motor drives the die 1 to slide along the first guide rail or the second guide rail according to the received signal, thereby achieving fine-tuning of the position of the die 1. For example, the die is slidably connected to the first guide rail, and at the same time, the first guide rail is slidably arranged on the second guide rail. When it is necessary to adjust the position of the die 1 in the first direction, the drive motor drives the die 1 to slide along the first guide rail. When it is necessary to adjust the position of the die 1 in the second direction, the drive motor drives the first guide rail to slide along the second guide rail, driving the die 1 to slide along the second guide rail, thereby achieving fine-tuning of the position of the die 1; of course, the second guide rail can also be slidably arranged on the first guide rail, which is not limited here.

[0036] In one embodiment of the present application, the support mechanism 3 further integrates a first deflection corrector 6, which is disposed upstream of the detection mechanism. The first deflection corrector 6 receives signals from the detection mechanism to correct for deviations in the foil during transport, thereby ensuring the accuracy of the coating position. For example, the first detection mechanism 4 and the second detection mechanism 5 may be CCD sensors that capture images of the coating edges and, through image processing algorithm analysis, accurately measure the edge position deviations of the coatings on both sides. The first deflection corrector 6 receives signals from the first detection mechanism 4 and / or the second detection mechanism 5 to correct for deviations in the second direction during foil transport, thereby eliminating edge position deviations in the coatings on both sides and ensuring the accuracy of the coating position.

[0037] In one embodiment of the present application, the foil coating device further includes an unwinding mechanism 7, which is located upstream of the die head 1. The unwinding mechanism 7 is used to place the foil material roll and smoothly transfer the foil to the support mechanism 3 through the transmission mechanism. To ensure the position accuracy of the foil before entering the coating area, the unwinding mechanism also includes a second deflection corrector 8, which works in a similar way to the first deflection corrector 6, but acts on the foil during the unwinding process.

[0038] Example 3:

[0039] See attached Figure 1. On the basis of Example 2, in order to accurately control the initial pressure during coating, in this embodiment, the foil coating device also includes a pressure regulating mechanism, which is movably connected to the die head 1 and is used to regulate the initial pressure of the foil coating applied by the die head 1 to the support mechanism 3. Specifically, the pressure regulating mechanism includes a slurry tank 9, a storage tank 10 and a three-way valve 11. The three-way valve 11 is provided with a first port, a second port and a third port. The slurry tank 9 is connected to the first port, the storage tank 10 is connected to the second port, and the die head 1 is connected to the third port. The first pressure sensor 12 is arranged on the branch between the third port and the die head 1, and can monitor the coating pressure in real time; the second pressure sensor 13 and the regulating valve 14 are arranged on the branch between the second port and the storage tank 10, and can be used to monitor the reflux pressure.

[0040] In one embodiment of the present application, the foil coating apparatus further includes a first controller and a second controller. The first controller is electrically connected to the first detection mechanism 4, the second detection mechanism 5, and the die adjustment mechanism 2. The first controller receives signals from the detection mechanism, calculates the position of the die 1 that requires adjustment using a built-in algorithm, and sends instructions to the die adjustment mechanism 2, causing the die adjustment mechanism 2 to drive the die 1 to perform fine adjustments. The second controller is electrically connected to the first pressure sensor 12, the second pressure sensor 13, and the regulating valve 14 to achieve closed-loop control. Based on the first pressure sensor 12 and the second pressure sensor 13, the second controller can also connect to the coating valve actuation signal of the die 1 and the tape encoder signal of the support mechanism 3 to determine the actuation of the coating valve.

[0041] During the initial adjustment phase, the die head 1 is advanced and aligned with the coating position; the fluid collector is moved; the branch between the die head 1 and the third port is opened, and the branch between the storage tank 10 and the second port is closed; when the encoder movement reaches a preset value or above, the coating pressure of the first pressure sensor 12 is read. For example, the difference a between the three consecutive readings of the first pressure sensor 12 is less than 0.5 Pa, and the pressure value a is cached in the second controller. When coating is stopped, the movement is stopped; the branch between the die head 1 and the third port is closed, and the branch between the storage tank 10 and the second port is opened; the second controller drives the regulating valve 14 motor to operate according to the cache memory, and adjusts the reflux pressure between the storage tank 10 and the second port to the cache value, for example, the difference between the three consecutive readings of the second pressure sensor 13 and the value a is less than 0.5 Pa, thereby ensuring that the pipeline pressure is equal to the continuous coating pressure, shortening the time for intermittent coating to reach the coating pressure, and increasing the stability of the coating surface density.

[0042] Example 4:

[0043] See attached Figure 1. Based on the third embodiment, the present invention also provides a foil coating system, including the above-mentioned foil coating device, which integrates all components including the die 1, the die adjustment mechanism 2, the support mechanism 3, the detection mechanism, the unwinding mechanism 7, the pressure regulating mechanism and the corresponding control system. The components work together through electrical and mechanical connections to jointly complete the task of accurately coating the foil. Through system-level integration and optimization, the system can significantly improve coating efficiency and coating quality, and meet the high-precision coating requirements in industrial production.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0045] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0046] In the description of the present invention, “plurality” means two or more.

[0047] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0048] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0049] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," and "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of these terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A foil coating device, characterized in that: It includes a die head (1), a die head adjustment mechanism (2), a support mechanism (3) and a detection mechanism; The die head (1) and the support mechanism (3) are arranged on opposite sides of the foil material, the support mechanism (3) is used to support and transport the foil material, and the die head is used to coat the foil material to form a coating; The detection mechanism is arranged downstream of the die head (1), and the detection mechanism is located on at least one side of the foil material, and is used to detect the thickness of the coating or the edge position of the coating on at least one side of the foil material; The die head adjustment mechanism (2) is movably connected to the die head (1) and electrically connected to the detection mechanism. The die head adjustment mechanism (2) is used to receive a signal from the detection mechanism and adjust the position of the die head (1) relative to the support mechanism (3) according to the thickness of the coating or the edge position of the coating.

2. A foil coating device according to claim 1, characterized in that: The detection mechanism comprises a first detection mechanism (4) and a second detection mechanism (5); the die head adjustment mechanism (2) is electrically connected to the first detection mechanism (4) and the second detection mechanism (5), respectively; the first detection mechanism (4) is located on one side of the foil material and is used to detect the thickness of the coating on the first side of the foil material or the edge position of the coating; the second detection mechanism (5) is located on the other side of the foil material and is used to detect the thickness of the coating on the second side of the foil material or the edge position of the coating; The die head adjustment mechanism (2) adjusts the position of the die head (1) relative to the support mechanism (3) in the first direction according to the thickness of the coating on the first side of the foil or the thickness of the coating on the second side of the foil; Alternatively, the die head adjustment mechanism (2) adjusts the position of the die head (1) relative to the support mechanism (3) in the second direction according to the edge position of the coating on the first side of the foil or the edge position of the coating on the second side of the foil; The first direction is perpendicular to the conveying surface of the foil material, and the second direction is perpendicular to the conveying direction of the foil material and perpendicular to the first direction.

3. A foil coating device according to claim 2, characterized in that: The die head adjustment mechanism (2) comprises a drive motor and a guide rail, the guide rail comprises a first guide rail and a second guide rail that are movably connected, the first guide rail extends along the first direction, the second guide rail extends along the second direction, the die head (1) is slidably connected to one of the first guide rail or the second guide rail, and the drive motor drives the die head (1) so that the die head (1) slides along the first guide rail or the second guide rail.

4. The foil coating device according to claim 1, characterized in that: The support mechanism (3) further comprises a first deflection corrector (6), which is arranged upstream of the detection mechanism and is used to receive a signal from the detection mechanism to correct the position of the foil on the support mechanism (3).

5. The foil coating device according to claim 1, characterized in that: It also includes an unwinding mechanism (7), which is arranged upstream of the die head (1) and is used to place a roll of foil material and transfer the foil material to the supporting mechanism (3).

6. The foil coating device according to claim 5, characterized in that: The unwinding mechanism (7) further comprises a second deflection corrector (8), which is arranged upstream of the detection mechanism and is used to receive a signal from the detection mechanism to correct the position of the foil on the unwinding mechanism (7).

7. The foil coating device according to claim 1, characterized in that: It also includes a pressure regulating mechanism, which is movably connected to the die head (1) and is used to regulate the initial pressure of the die head (1) when applying the foil coating to the support mechanism (3).

8. The foil coating device according to claim 7, characterized in that: The pressure regulating mechanism comprises a slurry tank (9), a storage tank (10) and a three-way valve (11); the three-way valve (11) is provided with a first port, a second port and a third port, the slurry tank (9) is connected to the first port, the storage tank (10) is connected to the second port, and the die head (1) is connected to the third port; a first pressure sensor (12) is provided on a branch line between the third port and the die head (1); a second pressure sensor (13) and a regulating valve (14) are provided on a branch line between the second port and the storage tank (10).

9. The foil coating device according to claim 8, characterized in that: It also includes a first controller and a second controller, wherein the first controller is electrically connected to the detection mechanism and the die head adjustment mechanism (2); and the second controller is electrically connected to the first pressure sensor (12), the second pressure sensor (13) and the regulating valve (14).

10. A foil coating system, characterized in that: The invention comprises a foil coating device according to any one of claims 1 to 9.

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