Coating device

Abstract

The utility model relates to a coating device, which comprises a die head, a coating device and a coating device, the die head is provided with a feed port and a discharge port which are communicated with each other, the feed port is configured to allow slurry to flow into the die head, and the discharge port is configured to allow the slurry to flow out of the die head and coat a base material to form a coating; the adjusting piece is arranged between the feeding mechanism and the feeding port and used for adjusting the feeding flow supplied to the feeding port through the feeding mechanism; the thickness measuring mechanism is used for detecting the actual thickness of the coating and feeding back the actual thickness to the adjusting part, and the adjusting part can adjust the feeding flow according to the relation between the actual thickness and the preset thickness, so that the actual thickness is within the set range of the preset thickness. The situation that the thickness of the coating exceeds the preset thickness range and consequently the thickness deviation of the coating is too large is avoided (for example, when the coating is a tab gluing layer, the situation that the thickness of the tab gluing layer exceeds the preset thickness range and consequently the thickness deviation of the tab gluing layer is too large is avoided), and the qualified rate of products is guaranteed.

Description

Technical Field

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

[0002] Lithium-ion power batteries have the characteristics of high operating voltage, high specific energy, small size, light weight, long cycle life, low self-discharge rate, no memory effect and no pollution, and are favored by many power equipment manufacturers.

[0003] During the operation of traditional lithium battery coating equipment, the thickness of the tab glue coating will change due to various reasons such as changes in the solid content of the tab glue slurry, changes in viscosity and changes in temperature, which will cause the tab glue coating thickness to deviate too much. If the tab glue coating thickness deviates too much, it will affect the subsequent product qualification rate. Utility Model Content

[0004] Based on this, it is necessary to provide a coating device that can help improve the uniformity of the thickness of the tab glue coating to address the problem that traditional coating equipment is prone to cause excessive deviation in the thickness of the tab glue coating, thereby affecting the product qualification rate.

[0005] A coating device, comprising:

[0006] A die head, wherein the die head has a feed port and a discharge port which are interconnected, wherein the feed port is configured to allow the slurry to flow into the die head, and the discharge port is configured to allow the slurry to flow out of the die head and be coated on the substrate to form a coating;

[0007] An adjusting member, disposed between the feeding mechanism and the feeding port, for adjusting a feed flow rate supplied to the feeding port through the feeding mechanism;

[0008] The thickness measuring mechanism is used to detect the actual thickness of the coating and feed it back to the adjusting member, and the adjusting member can adjust the feed flow rate according to the relationship between the actual thickness and the preset thickness so that the actual thickness is within the set range of the preset thickness.

[0009] In the above-mentioned coating device, the thickness measuring mechanism can measure the actual thickness of the coating in real time and feed it back to the adjusting member, and the adjusting member can adjust the feed flow rate according to the relationship between the actual thickness and the preset thickness, so that the actual thickness is within the preset range of the preset thickness. In this way, it is avoided that the thickness of the coating exceeds the preset thickness range and causes the coating thickness to deviate too much (for example, when the coating is a tab coating layer, it is avoided that the thickness of the tab coating layer exceeds the preset thickness range and causes the tab coating layer thickness to deviate too much), and the qualified rate of the product is guaranteed.

[0010] In one of the embodiments, the regulating member comprises an electric regulating valve, and the electric regulating valve can adjust the opening according to the relationship between the actual thickness and the preset thickness to adjust the feed flow rate.

[0011] In one embodiment, the die head has at least two groups of feed port groups, each group of the feed port groups includes a feed port and a discharge port that are interconnected, and the discharge port of each group of the feed port groups is configured to allow the slurry to flow out through the die head and be coated on the substrate to form a coating;

[0012] The number of the adjusting parts is equal to the number of the material port groups and is arranged in one-to-one correspondence. The thickness measuring mechanism is used to measure the actual thickness of each coating and feed back to the corresponding adjusting part. Each adjusting part can adjust the feed flow rate according to the relationship between the actual thickness corresponding to each coating and the preset thickness, so that the actual thickness corresponding to each coating is within the preset range of the preset thickness.

[0013] In one embodiment, the coating is a tab glue coating formed on a substrate.

[0014] In one embodiment, the thickness measuring mechanism includes a sensor assembly, which includes a first laser displacement sensor and a second laser displacement sensor, the first laser displacement sensor and the second laser displacement sensor are respectively located on both sides of the coating in the thickness direction of the coating, the first laser displacement sensor is used to measure the distance between itself and the first surface of the coating, and the second laser displacement sensor is used to measure the distance between itself and the second surface of the coating; the first surface and the second surface are arranged to be opposite to each other in the thickness direction of the coating.

[0015] In one embodiment, the thickness measuring mechanism further includes a driving assembly, the sensor assembly is connected to the driving assembly, and the driving assembly is used to drive the sensor assembly to reciprocate along a first direction, and the first direction is parallel to the width direction of the coating.

[0016] In one of the embodiments, the coating device further comprises the feeding mechanism, and the adjusting member is disposed between the feeding mechanism and the feeding port of the die head;

[0017] The feeding mechanism is used for providing slurry to the die head.

[0018] In one embodiment, the feeding mechanism comprises:

[0019] Storage tank, used to store slurry;

[0020] A proportional valve is provided between the storage tank and the regulating member; the proportional valve is used to stabilize the pressure in the pipeline of the feeding mechanism, and the slurry in the storage tank flows to the regulating member through the proportional valve;

[0021] A power pump is arranged on the pipeline of the feeding mechanism and is used to provide flow force for the slurry to flow from the storage tank to the die head.

[0022] In one embodiment, the feeding mechanism further includes a filter and an iron remover, and the filter and the iron remover are both arranged between the proportional valve and the storage tank. The filter is used to filter large particles in the slurry, and the iron remover is used to filter iron filings in the slurry.

[0023] In one embodiment, the feeding mechanism further comprises a diaphragm valve, wherein the diaphragm valve is disposed between the proportional valve and the storage tank, and the slurry can flow into the storage tank through the diaphragm valve; and / or

[0024] The feeding mechanism further comprises a stop valve, and the stop valve is arranged between the regulating member and the die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a coating device provided for an embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of the partial structure of the coating device shown in FIG.

[0027] Description of reference numerals:

[0028] 100, coating device; 10, die head; 20, adjusting part; 30, thickness measuring mechanism; 31, sensor assembly; 40, feeding mechanism; 41, storage tank; 42, proportional valve; 43, power pump; 44, filter; 45, iron remover; 46, diaphragm valve; 47, pressure sensor; 50, stop valve; 60, back roller; 200, substrate; 300, coating. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] 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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] See also Figure 1 and Figure 2 In one embodiment of the present application, a coating device 100 is provided for coating a slurry onto a surface of a substrate 200. In some specific embodiments, the substrate 200 is a metal strip. Of course, in other embodiments, the specific material of the substrate 200 is not limited.

[0036] Further, the slurry is applied to the surface of the substrate 200 to form a coating 300. In some specific embodiments, the coating 300 is a tab glue coating formed on the substrate 200, which can form an insulating portion on the tab, prevent a short circuit between the metal strip and the aluminum-plastic film during battery packaging, and heat and melt seal the aluminum-plastic film together to prevent leakage during packaging. Of course, in some other embodiments, the type of the coating 300 is not limited, such as the coating 300 can also be a pole piece slurry coating for preparing a pole piece.

[0037] In some embodiments, when the coating 300 is a tab glue coating formed on the substrate 200 , the tab main slurry for forming the pole piece can be coated together with the tab glue slurry through the die head 10 to form the tab glue coating and the pole piece slurry coating respectively.

[0038] The coating device 100 includes a die head 10, and the die head 10 has a feed port (not shown in the figure) and a discharge port (not shown in the figure), and the feed port is connected to the discharge port. The feed port is configured to supply slurry to flow into the die head 10, and the discharge port is configured to supply slurry to flow out of the die head 10 and be coated on the substrate 200 to form a coating 300. Specifically, in order to facilitate coating, the coating device 100 also includes a backing roller 60, and the backing roller 60 is used to support the substrate 200 to prevent the substrate 200 from being unstable when the die head 10 is coating the substrate 200, so that the distance between the die head 10 and the substrate 200 is always maintained within a preset range, thereby ensuring the uniformity of coating.

[0039] Continue reading Figure 1The coating device 100 further includes an adjusting member 20 and a thickness measuring mechanism 30. The adjusting member 20 is disposed between the feeding mechanism 40 and the feed port of the die head 10. The feeding mechanism 40 is used to provide the coating slurry, and the adjusting member 20 is used to adjust the feed flow rate of the feeding mechanism 40 to the feed port. The thickness measuring mechanism 30 is used to detect the actual thickness of the coating 300 and feed back to the adjusting member 20. The adjusting member 20 can adjust the feed flow rate according to the relationship between the actual thickness and the preset thickness, so that the actual thickness is within the preset range of the preset thickness.

[0040] It should be noted that the actual thickness is within the preset range of the preset thickness, which means that in some specific embodiments, the actual thickness is equal to the preset thickness. In some other embodiments, the preset thickness has an upper and lower fluctuation range, and the actual thickness is within the upper and lower fluctuation range of the preset thickness. It should also be noted that the preset thickness is set according to the working conditions.

[0041] In the coating device 100 provided in the embodiment of the present application, the thickness measuring mechanism 30 can measure the actual thickness of the coating 300 in real time and feed it back to the adjusting member 20, and the adjusting member 20 can adjust the feed flow rate according to the relationship between the actual thickness and the preset thickness, so that the actual thickness is within the preset range of the preset thickness. In this way, the thickness of the coating 300 is prevented from exceeding the preset thickness range and causing the thickness deviation of the coating 300 to be too large (such as when the coating 300 is a tab coating layer, the thickness of the tab coating layer is prevented from exceeding the preset thickness range and causing the thickness deviation of the tab coating layer to be too large), thereby ensuring the qualified rate of the product.

[0042] Furthermore, the coating device 100 includes a controller (not shown in the figure), and the thickness measuring mechanism 30 is electrically connected to the controller. The controller can obtain the actual thickness of the coating 300 measured by the thickness measuring mechanism 30, and control the regulating member 20 to adjust the feed flow rate according to the relationship between the actual thickness and the preset thickness, so that the actual thickness is within the preset range of the preset thickness.

[0043] In some embodiments, the coating device 100 includes the above-mentioned feeding mechanism 40 , and the adjusting member 20 is disposed between the feeding mechanism 40 and a feed inlet of the die head 10 . The feeding mechanism 40 is used to provide slurry to the die head 10 .

[0044] The feeding mechanism 40 includes a storage tank 41 and a proportional valve 42. The storage tank 41 is used to store slurry, and the proportional valve 42 is provided between the storage tank 41 and the regulating member 20. The proportional valve 42 is used to stabilize the pressure in the pipeline of the feeding mechanism 40, and the slurry in the storage tank 41 flows to the regulating member 20 through the proportional valve 42. The feeding mechanism 40 also includes a power pump 43, which is provided on the pipeline of the feeding mechanism 40 and is used to provide flow force for the slurry to flow from the storage tank 41 to the die head 10. Specifically, the power pump 43 is a screw pump.

[0045] In the above arrangement, when coating is performed, the power pump 43 is started, and the slurry flows from the storage tank 41 to the proportional valve 42. The proportional valve 42 can adjust the pressure of the slurry so that the pressure in the pipeline of the feeding mechanism 40 is stable. The slurry flows to the regulating member 20 through the proportional valve 42, and finally flows to the die head 10 through the regulating member 20 for coating. During the coating process, the thickness measuring mechanism 30 can detect the thickness of the coating 300 formed on the substrate 200. The controller receives the actual thickness of the coating 300 detected by the thickness measuring mechanism 30, and adjusts the regulating member 20 according to the relationship between the actual thickness and the preset thickness, thereby adjusting the feed flow rate to the feed port of the die head 10, so that the actual thickness of the coating 300 is always within the preset range of the preset thickness.

[0046] The feeding mechanism 40 further includes a filter 44 and an iron remover 45. The filter 44 and the iron remover 45 are both disposed between the proportional valve 42 and the storage tank 41. The filter 44 is used to filter large particles in the slurry, and the iron remover 45 is used to filter iron filings in the slurry.

[0047] Furthermore, the feeding mechanism 40 further includes a diaphragm valve 46, which is disposed between the proportional valve 42 and the storage tank 41, and the excess slurry can flow back to the storage tank 41 through the diaphragm valve 46. The coating device 100 further includes a stop valve 50, which is disposed between the regulating member 20 and the die head 10 to prevent the slurry in the die head 10 from flowing back.

[0048] The feeding mechanism 40 further includes a pressure sensor 47 , which is disposed on a pipeline of the feeding mechanism 40 and is used to detect the pressure in the pipeline.

[0049] In some embodiments, the adjusting member 20 is an electric regulating valve, and the controller can adjust the opening of the electric regulating valve according to the relationship between the actual thickness and the preset thickness to adjust the feed flow rate. It should be understood that in other embodiments, the type of the adjusting member 20 is not limited, as long as the purpose of adjusting the feed flow rate can be achieved.

[0050] In some embodiments, the die 10 has at least two groups of feed port groups, each group of feed port groups includes a feed port and a discharge port that are interconnected, and the discharge port of each feed port group is configured to allow the slurry to flow out through the die 10 and be coated on the substrate 200 to form a coating 300. The number of adjusting members 20 is equal to the number of feed port groups and is arranged one by one. The thickness measuring mechanism 30 is used to measure the actual thickness of each coating 300 and feed it back to the corresponding adjusting member 20. Each adjusting member 20 can adjust the feed flow rate of the corresponding feed port according to the relationship between the actual thickness corresponding to each coating 300 and the preset thickness, so that the actual thickness corresponding to each coating 300 is within the preset range of the preset thickness.

[0051] The coating device 100 can coat multiple coatings 300 each time because the die head 10 has multiple material ports, thereby improving coating efficiency. At the same time, the thickness measuring mechanism 30 can detect the actual thickness of each coating 300, and the controller can control the corresponding adjusting member 20 to adjust the feed flow rate, so that the actual thickness of each coating 300 is within a preset range of the preset thickness, thereby achieving the purpose of uniform thickness of all coatings 300.

[0052] In some embodiments, continue to refer to Figure 1 and Figure 2 The thickness measuring mechanism 30 includes a sensor assembly 31, and the sensor assembly 31 includes a first laser displacement sensor and a second laser displacement sensor. The first laser displacement sensor and the second laser displacement sensor are respectively located on both sides of the coating 300 in the thickness direction of the coating 300. The first laser displacement sensor is used to measure the distance from the first surface of the coating 300, and the second laser displacement sensor is used to measure the distance from the second surface of the coating 300. The first surface and the second surface are arranged opposite to each other in the thickness direction. Generally, the arrangement of the first laser displacement sensor and the second laser displacement sensor can ensure that the lasers of the two sensors are aimed at the same point. When the first laser displacement sensor measures the first distance between it and the first surface of the coating 300, and the second laser displacement sensor measures the second distance between it and the second surface of the coating 300, the thickness of the coating 300 can be obtained by subtracting the first distance and the second distance from the distance between the first laser displacement sensor and the second laser displacement sensor.

[0053] It is conceivable that in some other implementations, the structure of the thickness measuring mechanism 30 is not limited. For example, the thickness measuring mechanism 30 may also be a mechanical thickness measuring mechanism or an ultrasonic thickness measuring mechanism.

[0054] Furthermore, the thickness measuring mechanism 30 further includes a driving assembly, and the sensor assembly 31 is connected to the driving assembly, and the driving assembly is used to drive the sensor assembly 31 to reciprocate along a first direction, and the first direction is parallel to the width direction of the coating 300. In this way, when the coating device 100 simultaneously coats multiple coatings 300 (multiple coatings 300 are sequentially spaced along the width direction of the coating 300), the driving assembly drives the sensor assembly 31 to reciprocate in the first direction, and the thickness of each coating 300 can be measured to ensure the thickness consistency of each coating 300.

[0055] The coating device 100 provided in the embodiment of the present application has the following beneficial effects:

[0056] During coating, the thickness measuring mechanism 30 can detect the thickness change of the coating 300 in real time and output a feedback signal. The controller controls the adjusting member 20 to adjust the feed flow rate according to the relationship between the actual thickness and the preset thickness, such as controlling the adjusting member 20 to change the opening to adjust the feed flow rate, and closed-loop regulation so that the actual thickness is always within the preset range of the preset thickness.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A coating device, characterized in that: include: A die head (10), the die head (10) having a feed port and a discharge port which are interconnected, the feed port being configured to allow the slurry to flow into the die head (10), and the discharge port being configured to allow the slurry to flow out through the die head (10) to be coated onto a substrate (200) to form a coating (300); an adjusting member (20), disposed between the feeding mechanism (40) and the feeding port, and used for adjusting the feed flow rate supplied to the feeding port through the feeding mechanism (40); The thickness measuring mechanism (30) is used to detect the actual thickness of the coating (300) and feed back the actual thickness to the adjusting member (20), and the adjusting member (20) can adjust the feed flow rate according to the relationship between the actual thickness and the preset thickness so that the actual thickness is within the set range of the preset thickness.

2. The coating device according to claim 1, characterized in that: The regulating member (20) comprises an electric regulating valve, and the electric regulating valve can adjust the opening according to the relationship between the actual thickness and the preset thickness to adjust the feed flow rate.

3. The coating device according to claim 1, characterized in that: The die head (10) has at least two groups of material ports, each group of the material ports comprises a feed port and a discharge port that are interconnected, and the discharge port of each group of the material ports is configured to allow the slurry to flow out through the die head (10) and be coated on the substrate (200) to form a coating (300); The number of the adjusting members (20) is equal to the number of the feed port groups and they are arranged in one-to-one correspondence. The thickness measuring mechanism (30) is used to measure the actual thickness of each of the coatings (300) and feed back the actual thickness to the corresponding adjusting member (20). Each of the adjusting members (20) can adjust the feed flow rate according to the relationship between the actual thickness corresponding to each of the coatings (300) and the preset thickness, so that the actual thickness corresponding to each of the coatings (300) is within a preset range of the preset thickness.

4. The coating device according to claim 1, characterized in that: The coating (300) is a tab glue coating formed on the substrate (200).

5. The coating device according to claim 1, characterized in that: The thickness measuring mechanism (30) comprises a sensor assembly (31), the sensor assembly (31) comprising a first laser displacement sensor and a second laser displacement sensor, the first laser displacement sensor and the second laser displacement sensor being respectively located on both sides of the coating (300) in the thickness direction of the coating (300), the first laser displacement sensor being used to measure the distance between the first laser displacement sensor and a first surface of the coating (300), and the second laser displacement sensor being used to measure the distance between the first laser displacement sensor and a second surface of the coating (300); the first surface and the second surface are arranged opposite to each other in the thickness direction of the coating (300).

6. The coating device according to claim 5, characterized in that: The thickness measuring mechanism (30) further comprises a driving component, the sensor component (31) is connected to the driving component, and the driving component is used to drive the sensor component (31) to reciprocate along a first direction, wherein the first direction is parallel to a width direction of the coating (300).

7. The coating device according to claim 1, characterized in that: The coating device further comprises the feeding mechanism (40), and the adjusting member (20) is arranged between the feeding mechanism (40) and the feeding port of the die head (10); The feeding mechanism (40) is used to provide slurry to the die head (10).

8. The coating device according to claim 7, characterized in that: The feeding mechanism (40) comprises: A storage tank (41) for storing slurry; a proportional valve (42) disposed between the storage tank (41) and the regulating member (20); the proportional valve (42) is used to stabilize the pressure in the pipeline of the feeding mechanism (40), and the slurry in the storage tank (41) flows to the regulating member (20) through the proportional valve (42); A power pump (43) is provided on the pipeline of the feeding mechanism (40) and is used to provide flow force for the slurry to flow to the die head (10) through the storage tank (41).

9. The coating device according to claim 8, characterized in that: The feeding mechanism (40) further comprises a filter (44) and an iron remover (45), wherein the filter (44) and the iron remover (45) are both arranged between the proportional valve (42) and the storage tank (41), wherein the filter (44) is used for filtering large particles in the slurry, and the iron remover (45) is used for filtering iron filings in the slurry.

10. The coating device according to claim 8, characterized in that: The feeding mechanism (40) further comprises a diaphragm valve, wherein the diaphragm valve is arranged between the proportional valve (42) and the storage tank (41), and the slurry can flow into the storage tank (41) through the diaphragm valve; and / or The coating device further comprises a stop valve (50), wherein the stop valve (50) is arranged between the regulating member (20) and the die head (10).

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