Coating die head and coating equipment

Abstract

The utility model provides a coating die head and coating equipment. The coating die head comprises a first die head and a second die head, the first die head comprises a first cavity, a feeding port and a discharging port, the feeding port and the discharging port are communicated with the first cavity and arranged oppositely, so that slurry can reach the discharging port through the feeding port and the first cavity, and a groove is formed in the outer surface of the first die head; the second die head is connected to the surface of the side, provided with the groove, of the first die head, the second die head covers the groove to form a second cavity, the coating die head comprises an input port and an output port which are oppositely arranged and communicate with the second cavity, the input port is used for being connected with a pressure mechanism, and the output port is used for being connected with the pressure mechanism. And the second die head can apply pressure to the slurry flowing out of the discharge port through the output port.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and in particular to a coating die head and coating equipment. Background Art

[0002] In the production process of batteries, the coating process of the pole piece is an important link in the process design and production process. The quality of coating plays a decisive role in the performance of the entire battery. Therefore, in the production process of batteries, it is crucial to improve the coating quality and coating efficiency.

[0003] At present, in order to improve the coating quality, a pressure channel is usually set at the coating die head. Pressure is applied to the coating area through the pressure channel to adjust the coating state. However, it is difficult to set the pressure channel at the coating die head and improvement is urgently needed. Utility Model Content

[0004] In view of the above problems, the present application provides a coating die and a coating device, which can reduce the difficulty of setting the pressure channel on the coating die.

[0005] In the first aspect, the present application provides a coating die, comprising: a first die, comprising a first chamber and a feed port and an outlet port connected to the first chamber and arranged opposite to each other, so that the slurry can reach the outlet port via the feed port and the first chamber, and the outer surface of the first die is provided with a groove; a second die, connected to a side surface of the first die where the groove is provided, and the second die covers the groove to form a second chamber, wherein the coating die comprises an input port and an output port which are arranged opposite to each other and connected to the second chamber, and the input port is used to connect to a pressure mechanism so that the second die can apply pressure to the slurry flowing out of the outlet port through the output port.

[0006] In the scheme of the embodiment of the present application, the coating die head includes a first die head and a second die head, the first die head includes a first chamber and a feed port and a discharge port connected to the first chamber and arranged oppositely, so that the slurry can enter the first chamber through the feed port and reach the coating position from the first chamber through the discharge port, the outer surface of the first die head is provided with a groove, the second die head is connected to this surface, the second die head covers the groove to form a second chamber, the coating die head includes an input port and an output port arranged oppositely and connected to the second chamber, the input port is used to connect to the pressure mechanism, so that the external pressure acts through the input port, the second chamber and the output port The slurry flowing out from the discharge port is adjusted to adjust the state of the slurry. Therefore, in the embodiment of the present application, the first die head and the second die head jointly enclose a pressure channel that can apply pressure to the slurry, which reduces the second die head, that is, the pressure channel, which occupies the space outside the first die head, thereby reducing the difficulty of setting the second die head on the first die head and improving the overall reliability of the coating equipment; and the second chamber is formed by the second die head covering the groove of the first die head, which can further reduce the volume of the second die head, so as to further reduce the difficulty of setting the second die head on the first die head and improve the overall reliability of the coating equipment.

[0007] In some embodiments, the coating die includes an adjusting member, which is disposed in the second chamber and abuts against the first die and the second die. At least a portion of the cavity wall of the second chamber and the adjusting member enclose a sub-channel, which is connected to the input port and the output port.

[0008] In the technical solution of the embodiment of the present application, the coating die includes an adjusting part arranged in the second chamber and abutting against the first die and the second die. At least part of the cavity wall of the second chamber and the adjusting part enclose a sub-channel, and the sub-channel is connected to the input port and the output port so that the pressure of the external pressure mechanism passes through the sub-channel and acts on the slurry through the output port. By changing the size and number of the sub-channels on the adjusting part, the intensity and range of the output pressure of the output port can be adjusted, so that the coating die can apply corresponding pressure to different slurry coating areas through the adjusting part, so as to improve the control effect of the coating die on different slurry coating areas, so as to optimize the coating quality of the coating equipment.

[0009] In some embodiments, the regulating member includes a gasket, the gasket includes an end surface facing the output port, and a flow groove extending from the end surface toward the input port, and the sub-channel is surrounded by the flow groove and the cavity wall of the second chamber.

[0010] In the technical solution of the embodiment of the present application, the adjusting part includes a gasket, which includes an end face facing the output port and a flow groove extending from the end face toward the input port. The flow groove and the cavity wall of the second chamber form a sub-channel connecting the input port and the output port. By replacing the gasket with flow grooves of different numbers and sizes, the pressure output state of the output port can be conveniently changed, so that the coating die head can be applied to production lines with different coating conditions.

[0011] In some embodiments, the gasket includes at least two flow channels spaced apart from each other.

[0012] In the technical solution of the embodiment of the present application, the gasket includes at least two flow grooves arranged at intervals, so that through the gasket, the output port can apply pressure to multiple coating areas respectively.

[0013] In some embodiments, the cross-sectional area of ​​the flow channel tends to increase along the direction from the input port to the output port, or the cross-sectional area of ​​the flow channel tends to increase from the output port to the input port.

[0014] In the technical solution of the embodiment of the present application, the cross-sectional area of ​​the circulation groove tends to increase along the direction from the input port to the output port, so that a smaller force can be applied to a wider coating area through the gasket output port; from the output port to the input port, the cross-sectional area of ​​the circulation groove tends to increase, so that a larger force can be applied to a narrower coating area through the gasket output port, thereby applying a more precise and stable force to different coating areas through the gasket coating die head to improve the coating quality of the coating equipment.

[0015] In some embodiments, the adjusting member includes a stopper connected to a side wall of the gasket facing the flow slot, and the stopper is disposed at an end of the side wall close to the output port.

[0016] In the technical solution of the embodiment of the present application, the adjusting member includes a block connected to the side wall of the gasket facing the flow groove, and the block is located at one end of the side wall close to the output port. By setting blocks of different sizes to adjust the cross-sectional area of ​​the end of the flow groove close to the output port, the flow rate from the sub-channel to the output port can be adjusted to accurately adjust the pressure of the coating die head on the coating area, thereby improving the coating quality of the coating equipment.

[0017] In some embodiments, the regulating member includes a partition, at least two partitions are arranged at intervals along the extension direction of the output port, and the sub-channel is surrounded by the partition and the cavity wall of the second chamber.

[0018] In the technical solution of the embodiment of the present application, the adjusting member includes a partition, at least two partitions are arranged at intervals along the extension direction of the output port, and the sub-channel is enclosed by the partition and the cavity wall of the second chamber. By adjusting the number and position of the partitions, the pressure state of the output of the output port can be adjusted to improve the control effect of the coating die head on different coating areas and improve the coating quality of the coating equipment.

[0019] In some embodiments, at least one of the first die head and the second die head is provided with a pressure equalizing groove on a side surface facing the second chamber, the pressure equalizing groove extends along the first direction, the direction from the input port to the output port intersects with the first direction, and the pressure equalizing groove is connected to the sub-channel and the input port.

[0020] In the technical solution of the embodiment of the present application, the external pressure is input into the sub-channel via the pressure equalizing groove, and the pressure equalizing groove plays the role of balancing the pressure, so that the pressure output from the output port is more stable, so as to enhance the adjustment effect of the coating die head on the coating area.

[0021] In some embodiments, the first die head includes a first sub-die head and a second sub-die head, the first cavity is formed by splicing the first sub-die head and the second sub-die head, the second cavity is formed by splicing the second sub-die head and the second die head, the second sub-die head includes a first surface facing the first cavity and a second surface facing the second cavity, respectively, and an angle θ between the first surface and the second surface satisfies 0<θ<90°.

[0022] In the technical solution of the embodiment of the present application, the second sub-die head includes a first surface facing the first chamber and a second surface facing the second chamber respectively, and the angle θ between the first surface and the second surface satisfies 0<θ<90°, so as to change the angle between the axes of the output port and the discharge port, and adjust the pressure applied to the slurry by the output port, so that the coating die head can accurately adjust the quality of the slurry layer.

[0023] In some embodiments, the coating die includes a cover plate, which is rotatably connected to a second die so that the cover plate can rotate relative to the second die between a first position and a second position. When the cover plate is in the first position, the cover plate covers the output port. When the cover plate is in the second position, a gap is formed between the cover plate and the first die, and the gap is connected to the second chamber.

[0024] In the technical solution of the embodiment of the present application, the coating die includes a cover plate, which is rotated between a first position and a second position to adjust the pressure intensity and direction at the output port, so as to improve the coating die's control ability over the coating area and improve the coating quality of the coating equipment.

[0025] In a second aspect, the present application also provides a coating device, comprising a coating die head according to any embodiment of the first direction described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of a coating die head provided in one embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the second surface of the coating die provided in one embodiment of the present application;

[0029] Figure 3 is a schematic structural diagram of a coating die head provided in another embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of the gasket structure of a coating die head provided in one embodiment of the present application;

[0031] Figure 5 is a schematic diagram of a gasket structure of a coating die head provided in another embodiment of the present application;

[0032] Figure 6 It is a front view of a coating die provided in one embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Coating die head;

[0035] 11. first die head; 111. first chamber; 112. feed port; 113. discharge port; 114. groove; 115. first sub-die head; 116. second sub-die head; 1161. first surface; 1162. second surface;

[0036] 12. second die head; 121. second chamber; 122. input port; 123. output port;

[0037] 13. adjusting member; 131. sub-flow channel; 132. gasket; 133. stopper; 134. flow slot; 1321. end face; 1322. side wall; 135. partition;

[0038] 141. Pressure equalizing trough; 142. Cover plate. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0041] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application 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 embodiments of the present application.

[0042] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] In the description of the embodiments of the present application, 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 that 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.

[0045] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0046] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0047] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0048] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A battery cell mainly works by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector includes a positive current collector and a positive electrode ear connected to the positive current collector. The positive current collector is coated with a positive active material layer, and the positive electrode ear is not coated with a positive active material layer. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material. The positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer is coated on the surface of the negative current collector; the negative current collector includes a negative current collector and a negative electrode tab connected to the negative current collector, the negative current collector is coated with the negative active material layer, and the negative electrode tab is not coated with the negative active material layer. The material of the negative current collector can be copper, the negative active material layer includes a negative active material, and the negative active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0049] In the related art, in order to improve the coating quality of the slurry, a pressure channel is usually set at the coating die head, and pressure is applied to the coating area through the pressure channel to improve the coating quality of the coating area. However, it is difficult to set the pressure channel at the coating die head.

[0050] In the related art, the overall structure of the coating equipment is compact. After the coating equipment is assembled, the external space at the coating die head is tight, while the size of the pressure channel is large, so it is difficult to combine the pressure channel and the coating die head.

[0051] Based on the above problems, an embodiment of the present application provides a coating die head, which includes a first die head and a second die head. The first die head includes a first chamber and a feed port and a discharge port that are connected to the first chamber and are arranged opposite to each other, so that the slurry can enter the first chamber through the feed port and reach the coating position from the first chamber through the discharge port. The outer surface of the first die head is provided with a groove, and the second die head is connected to this surface. The second die head covers the groove to form a second chamber. The coating die head includes an input port and an output port that are arranged opposite to each other and connected to the second chamber. The input port is used to connect to a pressure mechanism so that the external pressure can pass through the input port and the second chamber. and the output port act on the slurry flowing out of the discharge port to adjust the state of the slurry. Therefore, in the embodiment of the present application, the first die head and the second die head jointly enclose a pressure channel that can apply pressure to the slurry, which reduces the occupation of the second die head, that is, the pressure channel, on the space outside the first die head, thereby reducing the difficulty of setting the second die head on the first die head and improving the overall reliability of the coating equipment; and the second chamber is formed by the second die head covering the groove of the first die head, which can further reduce the volume of the second die head, so as to further reduce the difficulty of setting the second die head on the first die head and improve the overall reliability of the coating equipment.

[0052] See also Figure 1 and Figure 2 , Figure 1 It is a structural schematic diagram of a coating die head provided in one embodiment of the present application; Figure 2 It is a schematic diagram of the second surface of the coating die provided in one embodiment of the present application.

[0053] First, as Figure 1 and Figure 2 As shown, the present application provides a coating die 1, which includes a first die 11 and a second die 12. The first die 11 includes a first chamber 111 and a feed port 112 and a discharge port 113 that are connected to the first chamber 111 and are arranged opposite to each other, so that the slurry can reach the discharge port 113 via the feed port 112 and the first chamber 111, and a groove 114 is provided on the outer surface of the first die 11; the second die 12 is connected to a side surface of the first die 11 where the groove 114 is provided, and the second die 12 covers the groove 114 to form a second chamber 121, wherein the coating die 1 includes an input port 122 and an output port 123 that are arranged opposite to each other and connected to the second chamber 121, and the input port 122 is used to be connected to a pressure mechanism, so that the second die 12 can apply pressure to the slurry flowing out of the discharge port 113 through the output port 123.

[0054] In the scheme of the embodiment of the present application, the coating die 1 includes a first die 11 and a second die 12, the first die 11 includes a first chamber 111 and a feed port 112 and a discharge port 113 which are connected to the first chamber 111 and are arranged opposite to each other, so that the slurry can enter the first chamber 111 through the feed port 112, and reach the coating position from the first chamber 111 through the discharge port 113, the outer surface of the first die 11 is provided with a groove 114, the second die 12 is connected to this surface, and the second die 12 is covered with this groove 114 to form a second chamber 121, the coating die 1 includes an input port 122 and an output port 123 which are arranged opposite to each other and are connected to the second chamber 121, the input port 122 is used to be connected to the pressure mechanism, so that the external pressure passes through the input port 114 22. The second chamber 121 and the output port 123 act on the slurry flowing out of the discharge port 113 to adjust the state of the slurry. Therefore, in the embodiment of the present application, the first die 11 and the second die 12 together enclose a pressure channel that can apply pressure to the slurry, which reduces the occupation of the second die 12, that is, the pressure channel, on the outer space of the first die 11, thereby reducing the difficulty of setting the second die 12 on the first die 11 and improving the overall reliability of the coating equipment; and the second chamber 121 is formed by the second die 12 covering the groove 114 of the first die 11, which can further reduce the volume of the second die 12, so as to further reduce the difficulty of setting the second die 12 on the first die 11 and improve the overall reliability of the coating equipment.

[0055] The coating die 1 comprises a first die 11 and a second die 12. The first die 11 is provided with a first chamber 111 and a feed port 112 and a discharge port 113 which are connected to and opposite to the first chamber 111. The external slurry enters the first chamber 111 from the feed port 112 and is then coated on the area to be coated from the discharge port 113.

[0056] In the related art, the pressure channel is independent of the coating die 1. Since the space outside the coating die 1 is compact and the independent pressure channel needs to occupy more space, the pressure channel and the coating die 1 are difficult to assemble, and the pressure channel is easy to interfere with other structural parts during the operation of the coating die 1. In the embodiment of the present application, by adopting the scheme that the first die 11 and the second die 12 jointly enclose the second chamber 121, at least part of the volume of the pressure channel is borne by the first die 11, so that the size of the second die 12 can be reduced, and in the compact space outside the first die 11, the difficulty of setting the smaller second die 12 is also reduced.

[0057] The surface of the first die head 11 is provided with a groove 114, and the second die head 12 is connected to the first die head 11 and covers the groove 114 to form a second chamber 121. The external pressure acts on the slurry flowing out of the discharge port 113 through the input port 122, the second chamber 121 and the output port 123. The pressure output by the output port 123 can be used to adjust the coating thickness and improve the surface flatness of the coating. The output of the output port 123 can be dry air, high-purity gas, inert gas, organic gas, etc., or the output of the output port 123 can be functional materials, such as plasticizing materials, to reduce the risk of cracking of the substrate surface coating. The input port 122 can be connected to a positive pressure mechanism or a negative pressure mechanism so that the output port 123 outputs suction or pressure to the outside world.

[0058] A groove 114 is provided on the surface of the first die head 11, and the second cavity 121 is enclosed by the groove 114 and the surface of the second die head 12. The groove 114 is provided in the first die head 11 so that the space required for the cavity can be more borne by the first die head 11, so as to reduce the volume of the second die head 12 and facilitate the arrangement of the second die head 12 in a compact space outside the first die head 11.

[0059] Optionally, the surface of the second die head 12 covering the groove 114 is flat, which can reduce the volume of the second die head 12 and reduce the difficulty of combining the second die head 12 and the first die head 11; or the second die head 12 includes a first groove 114 extending away from the first die head 11, the first die head 11 and the second die head 12 are spliced ​​with each other, and the first groove 114 covers the groove 114 to form a second accommodating cavity with a larger volume.

[0060] Optionally, in the arrangement direction of the feed port 112 and the discharge port 113, the output port 123 is located between the discharge port 113 and the feed port 112 to reduce the risk of the output port 123 and the slurry coating being too close to each other when the coating die 1 is working, the coating being damaged by excessive pressure, or the output port 123 scratching the slurry coating.

[0061] Optionally, the first die head 11 and the second die head 12 are detachably connected to facilitate inspection and maintenance of the coating die head 1. Exemplarily, the first die head 11 and the second die head 12 are connected by a clamping connection or a bolt connection.

[0062] Optionally, the wind speed of the outlet 123 is greater than 3 m / s, so that the outlet 123 can generate sufficient force on the slurry coating.

[0063] See also Figure 3 , Figure 3 It is a schematic diagram of the structure of a coating die provided in another embodiment of the present application.

[0064] In some embodiments, Figure 3As shown, the coating die 1 includes an adjusting member 13, which is disposed in the second chamber 121 and abuts against the first die 11 and the second die 12. At least a portion of the cavity wall of the second chamber 121 and the adjusting member 13 enclose a sub-channel 131, and the sub-channel 131 is connected to the input port 122 and the output port 123.

[0065] In these embodiments, the coating die 1 includes an adjusting member 13 disposed in the second chamber 121 and abutting against the first die 11 and the second die 12. At least a portion of the cavity wall of the second chamber 121 and the adjusting member 13 enclose a sub-channel 131. The sub-channel 131 is connected to the input port 122 and the output port 123, so that the pressure of the external pressure mechanism passes through the sub-channel 131 and acts on the slurry through the output port 123. By changing the size and number of the sub-channels 131 on the adjusting member 13, the intensity and range of the output pressure of the output port 123 can be adjusted, so that the coating die 1 can apply corresponding pressure to different slurry coating areas through the adjusting member 13, so as to improve the control effect of the coating die 1 on different slurry coating areas, so as to optimize the coating effect of the coating equipment.

[0066] The adjusting member 13 is fixed in the second chamber 121 by means of a clamping or bolting connection, and the adjusting member 13 abuts against the first die head 11 and the second die head 12, so that the adjusting member 13 and at least part of the cavity wall of the second chamber 121 can enclose a sub-channel 131, and the outlet end of the sub-channel 131 away from the input port 122 is arranged toward the output port 123. The adjusting member 13 is arranged between the input port 122 and the output port 123, and the gas of the input port 122 needs to first enter the sub-channel 131, and then be output to the output port 123 from the sub-channel 131.

[0067] When the coating device is actually working, it needs to deal with different coating requirements, such as coating several areas at intervals on the substrate, or forming coating areas of different widths on different substrates, or forming coating areas of different materials and thicknesses on different substrates. Therefore, different coating areas have different requirements for regulating the pressure applied by the coating die head 1.

[0068] In this embodiment, different coating requirements can be met by changing the structure of the adjusting member 13, without having to replace the coating equipment as a whole, thereby reducing equipment costs. For example, the number of sub-channels 131 can be increased or decreased so that the output port 123 can apply force to several spaced coating areas without applying force to non-coating areas, thereby reducing equipment energy consumption and saving costs; the width of the sub-channel 131 can be increased or decreased to cope with coating areas of different widths, and the flow rate at the outlet of the sub-channel 131 can be adjusted to adjust the pressure acting on the coating area.

[0069] See also Figure 4 , Figure 4It is a schematic diagram of the gasket structure of a coating die head provided in one embodiment of the present application.

[0070] In some embodiments, Figure 3 and Figure 4 As shown, the regulating member 13 includes a gasket 132 , which includes an end surface 1321 facing the output port 123 and a flow groove 134 extending from the end surface 1321 toward the input port 122 . The sub-channel 131 is formed by the flow groove 134 and the cavity wall of the second chamber 121 .

[0071] In these embodiments, the adjusting member 13 includes a gasket 132, which includes an end face 1321 facing the output port 123 and a flow groove 134 extending from the end face 1321 toward the input port 122. The flow groove 134 and the cavity wall of the second chamber 121 form a sub-channel 131 connecting the input port 122 and the output port 123. By replacing the gasket 132 with flow grooves 134 of different numbers and sizes, the pressure output state of the output port 123 can be conveniently changed, so that the coating die head 1 can be applied to production lines with different coating conditions.

[0072] Optionally, the gasket 132 is disposed in the second chamber 121 , and the overall volume of the coating die 1 will not increase due to the provision of the gasket 132 , that is, the gasket 132 will not occupy the space outside the first die 11 , and the gasket 132 will not cause difficulties in assembling the second die 12 and the first die 11 .

[0073] Optionally, the gasket 132 is detachably disposed in the second chamber 121, so that it can be easily replaced when corresponding to substrates with different coating requirements. Exemplarily, a plurality of fixing holes are provided through the surface of the gasket 132, and a plurality of fixing pins are correspondingly provided in the second chamber 121, and the fixing holes are sleeved on the fixing pins, so that the gasket 132 is stably disposed in the second chamber 121.

[0074] Optionally, the gasket 132 is made of stainless steel or aluminum alloy to improve the reliability of the gasket 132 .

[0075] Optionally, the shape of the gasket 132 matches the shape of the second chamber 121, and in the extension direction of the output port 123, the edge of the gasket 132 coincides with the edge of the second chamber 121, so that the gas can only reach the output port 123 from the input port 122 through the sub-channel 131 formed by the connecting groove, so as to conveniently control the pressure state of the output of the output port 123. Therefore, the overall shape and size of each gasket 132 used in the same coating device are similar, and only the flow groove 134 on the gasket 132 is different, which can reduce the preparation cost of the gasket 132.

[0076] Optionally, the thickness of the gasket 132 is the height of the second chamber 121. The thickness D of the gasket 132 is 0.1 mm < D < 2 mm. When the thickness of the gasket 132 is within this range, it can improve the problem of excessive wind resistance caused by a too narrow chamber and the problem of serious airflow leakage caused by a too wide chamber.

[0077] Optionally, the shape of the flow slot 134 can be flexibly set. Exemplarily, the flow slot 134 is rectangular, trapezoidal, semicircular, etc.

[0078] In some embodiments, Figure 3 and Figure 4 As shown, the gasket 132 includes at least two flow slots 134 spaced apart from each other.

[0079] In these embodiments, the gasket 132 includes at least two flow slots 134 spaced apart from each other, so that the outlet 123 can apply pressure to the plurality of coating areas through the gasket 132 .

[0080] The number of the flow slots 134 on the gasket 132 is not less than the number of coating areas spaced apart on the substrate to be coated by the coating device, so as to facilitate applying different forces to different coating areas through the gasket 132 to improve the coating quality of the device.

[0081] Exemplarily, two, three or four flow slots 134 are arranged at intervals on the gasket 132. The cross-sectional areas of the flow slots 134 are the same or different.

[0082] Optionally, in the extension direction of the outlet 123, the width of the flow slot 134 is greater than the width of the corresponding coating area, so as to improve the problem of insufficient force on the edge of the coating area caused by wind dissipation at the edge of the sub-channel 131. Alternatively, in the extension direction of the outlet 123, the width of the flow slot 134 is less than the width of the corresponding coating area, so that the edge of the coating area can maintain a higher thickness.

[0083] See also Figure 5 , Figure 5 It is a schematic diagram of the gasket structure of a coating die head provided in another embodiment of the present application.

[0084] In some embodiments, Figure 3 and Figure 5 As shown, along the direction from the input port 122 to the output port 123 , the cross-sectional area of ​​the flow slot 134 tends to increase, or from the output port 123 to the input port 122 , the cross-sectional area of ​​the flow slot 134 tends to increase.

[0085] In these embodiments, along the direction from the input port 122 to the output port 123, the cross-sectional area of ​​the flow groove 134 tends to increase, so that a smaller force can be applied to a wider coating area through the gasket 132 and the output port 123; from the output port 123 to the input port 122, the cross-sectional area of ​​the flow groove 134 tends to increase, so that a larger force can be applied to a narrower coating area through the gasket 132 and the output port 123, thereby the coating die 1 can apply a more precise and stable force to different coating areas through the gasket 132 to improve the coating quality of the coating equipment.

[0086] When the flow groove 134 is rectangular, the opening width of the rectangular flow groove 134 matches the width of the coating area. Generally, the flow groove 134 with a larger opening corresponds to a wider coating area and applies a larger force thereto, while the flow groove 134 with a smaller opening corresponds to a wider coating area and applies a smaller force thereto.

[0087] In the present embodiment, along the direction from the input port 122 to the output port 123, the circulation slot 134 includes a first end and a second end that are arranged opposite to each other, and the airflow enters the circulation slot 134 from the first end and is output from the circulation slot 134 from the second end. When the first end is larger than the second end, more airflow can enter the circulation slot 134, and a larger pressure acts on a narrower coating area from a smaller second end; similarly, when the first end is smaller than the second end, less airflow enters the circulation slot 134, and a smaller pressure acts on a wider coating area from a larger second end. Thus, by changing the shape of the circulation slot 134, the coating die head 1 of the present application can cope with more coating requirements.

[0088] Optionally, the same gasket 132 may be provided with a plurality of flow slots 134 of different shapes. For example, the gasket 132 is provided with rectangular flow slots 134 and trapezoidal flow slots 134 at intervals.

[0089] In some embodiments, Figure 3 and Figure 4 As shown, the regulating member 13 includes a stopper 133 , which is connected to a side wall 1322 of the gasket 132 facing the flow slot 134 , and is disposed at one end of the side wall 1322 close to the output port 123 .

[0090] In these embodiments, the adjusting member 13 includes a block 133 connected to the side wall 1322 of the gasket 132 toward the flow groove 134, and the block 133 is located at one end of the side wall 1322 close to the output port 123. By setting blocks 133 of different sizes to adjust the cross-sectional area of ​​the end of the flow groove 134 close to the output port 123, the flow rate from the sub-channel 131 to the output port 123 can be adjusted to accurately adjust the pressure of the coating die 1 on the coating area, thereby improving the coating quality of the coating equipment.

[0091] The block 133 is connected to the side wall 1322 of the gasket 132 facing the flow groove 134, and the block 133 is arranged at one end of the side wall 1322 close to the output port 123. By arranging block 133 of different sizes on the gasket 132, the cross-sectional area of ​​the outlet end of the flow groove 134 can be adjusted, thereby adjusting the pressure state of the output port 123.

[0092] When applied to similar coating requirements, adjustment is performed through the stopper 133 without replacing the gasket 132, which reduces the material cost of the coating equipment.

[0093] In the working state, the pressure state of the output port 123 can be adjusted through the pressure mechanism and the stopper 133 so that the coating die head 1 can better control the coating quality.

[0094] Optionally, the stopper 133 and the gasket 132 are prepared separately, and the stopper 133 and the gasket 132 are connected by snap-fitting or bolting, so as to facilitate the connection between different gaskets 132 and stoppers 133 of different sizes.

[0095] Optionally, a stopper 133 may be provided on one side wall 1322 or both side walls 1322 of the circulation slot 134 .

[0096] Exemplarily, the stopper 133 is in a cube shape.

[0097] See also Figure 6 , Figure 6 It is a front view of a coating die provided in one embodiment of the present application.

[0098] In some embodiments, Figure 3 and Figure 6 As shown, the regulating member 13 includes a partition 135 , at least two partitions 135 are arranged at intervals along the extension direction of the outlet 123 , and the sub-channel 131 is surrounded by the partition 135 and the cavity wall of the second chamber 121 .

[0099] In these embodiments, the adjusting member 13 includes a partition 135, at least two partitions 135 are spaced apart along the extension direction of the output port 123, and the sub-channel 131 is surrounded by the partition 135 and the cavity wall of the second chamber 121. The pressure state of the output of the output port 123 is adjusted by adjusting the number and position of the partitions 135 to improve the control effect of the coating die 1 on different coating areas and improve the coating quality of the coating equipment.

[0100] The partition plate 135 is disposed in the second chamber 121 , and the partition plate 135 and the first die head 11 and the second die head 12 abut against each other, so that the second chamber 121 is divided into a plurality of sub-flows by the partition plate 135 disposed at intervals.

[0101] Each partition 135 has the same shape and size to reduce the preparation cost of the partition 135. When dealing with different coating requirements, it can be achieved by changing the position and spacing of the partition 135 in the second chamber 121. Exemplarily, the sub-channel 131 is arranged between two adjacent partitions 135, and a plurality of partitions 135 close to each other can be arranged in the area where the air flow does not need to pass.

[0102] The partition 135 is detachably connected to the second chamber 121 to facilitate the installation of the partition 135 at different positions. Exemplarily, the partition 135 is magnetically connected to the cavity wall of the second chamber 121, the cavity wall of the second chamber 121 is provided with first magnetic members at equal intervals, the partition 135 is provided with a second magnetic member, and the first magnetic member and the second magnetic member are magnetically connected;

[0103] Alternatively, the partition 135 is connected to the wall of the second chamber 121 by snapping, the wall of the second chamber 121 is provided with first snapping members at equal intervals, the partition 135 is provided with second snapping members, and the first magnetic member and the second snapping member are connected by snapping. The two partitions 135 connected to two adjacent second snapping members or second magnetic members are closely attached together.

[0104] In some embodiments, Figure 3 As shown, at least one of the first die head 11 and the second die head 12 is provided with a pressure equalizing groove 141 on one side surface facing the second chamber 121, the pressure equalizing groove 141 extends along the first direction X, the direction from the input port 122 to the output port 123 intersects with the first direction X, and the pressure equalizing groove 141 is connected to the sub-channel 131 and the input port 122.

[0105] In these embodiments, the external pressure is input into the sub-channel 131 via the pressure equalizing groove 141 , and the pressure equalizing groove 141 plays a role in balancing the pressure, so that the pressure output by the output port 123 is more stable, so as to enhance the adjustment effect of the coating die 1 on the coating area.

[0106] The external airflow first enters the pressure equalizing groove 141, which extends along the first direction X. The airflow diffuses in the pressure equalizing groove 141 and then enters each sub-channel 131 from the pressure equalizing groove 141, so that the airflow enters the sub-channel 131 with relatively uniform pressure.

[0107] Optionally, the output port 123 extends along the first direction X, and the arrangement direction of the input port 122 and the output port 123 is perpendicular to the first direction X.

[0108] Optionally, the first die head 11 and the second die head 12 are both provided with pressure equalizing grooves 141 opposite to each other, thereby improving the pressure equalizing effect of the pressure equalizing grooves 141 on the airflow.

[0109] In some embodiments, Figure 1As shown, the first die 11 includes a first sub-die 115 and a second sub-die 116, the first chamber 111 is formed by splicing the first sub-die 115 and the second sub-die 116, the second chamber 121 is formed by splicing the second sub-die 116 and the second die 12, the second sub-die 116 includes a first surface 1161 facing the first chamber 111 and a second surface 1162 facing the second chamber 121, and the angle θ between the first surface 1161 and the second surface 1162 satisfies 0<θ<90°.

[0110] In these embodiments, the second sub-die 116 includes a first surface 1161 facing the first chamber 111 and a second surface 1162 facing the second chamber 121, and an angle θ between the first surface 1161 and the second surface 1162 satisfies 0<θ<90°, so as to change the angle between the axis of the output port 123 and the output port 113, and adjust the pressure of the output port 123 applied to the slurry, so that the coating die 1 can accurately adjust the quality of the slurry layer.

[0111] The coating die 1 is formed by sequentially splicing the first sub-die 115, the second sub-die 116 and the second die 12, and respectively forming the first chamber 111 and the second chamber 121. The second sub-die 116 is disposed between the first sub-die 115 and the second die 12, and the angle between the axis of the outlet 123 and the material outlet 113 is adjusted by adjusting the angle between the first surface 1161 and the second surface 1162 of the second sub-die 116, so as to adjust the pressure of the outlet 123 on the slurry.

[0112] In some embodiments, Figure 1 As shown, the coating die 1 includes a cover plate 142, which is rotatably connected to the second die 12 so that the cover plate 142 can rotate between a first position and a second position relative to the second die 12. The cover plate 142 is in the first position, and the cover plate 142 covers the output port 123. The cover plate 142 is in the second position, and a gap is formed between the cover plate 142 and the first die 11, and the gap is connected to the second chamber 121.

[0113] In these embodiments, the coating die 1 includes a cover plate 142, which is rotated between a first position and a second position to adjust the pressure angle and intensity at the output port 123, thereby improving the coating die 1's ability to control the coating area and improving the coating quality of the coating equipment.

[0114] One of the cover plate 142 and the second die head 12 is provided with a rotating shaft, and the other is provided with an axial hole, and the rotating shaft is rotatably accommodated in the axial hole.

[0115] Optionally, the coating die 1 includes a driving mechanism connected to the cover plate 142, which drives the cover plate 142 to rotate relative to the second die 12. The driving mechanism adjusts the rotation position of the cover plate 142 to adjust the pressure angle and intensity of the outlet 123 acting on the coating area.

[0116] Optionally, the cover plate 142 includes a plurality of sub-cover plates arranged at intervals, and each sub-cover plate can be independently rotated relative to the second die head 12 to facilitate adjustment of the pressure angle and intensity of each location of the output port 123 acting on the coating area.

[0117] In a second aspect, the present application further provides a coating device, comprising a coating die head according to any embodiment of the first direction X described above.

[0118] In some embodiments, Figures 1 to 6As shown, the coating die 1 includes a first die 11, a second die 12 and an adjusting member 13. The first die 11 includes a first chamber 111 and a feed port 112 and a discharge port 113 which are connected to and opposite to the first chamber 111, so that the slurry can reach the discharge port 113 via the feed port 112 and the first chamber 111. A groove 114 is provided on the outer surface of the first die 11; the second die 12 is connected to a side surface of the first die 11 where the groove 114 is provided, and the second die 12 covers the groove 114 to form a second chamber 121 The coating die head 1 comprises an input port 122 and an output port 123 which are arranged opposite to each other and communicate with the second chamber 121. The input port 122 is used to connect with the pressure mechanism so that the second die head 12 can apply pressure to the slurry flowing out of the discharge port 113 through the output port 123. The regulating member 13 is arranged in the second chamber 121, and the regulating member 13 abuts against the first die head 11 and the second die head 12. At least part of the cavity wall of the second chamber 121 and the regulating member 13 enclose a sub-channel 131. The sub-channel 131 is connected to the input port 122 and the output port 123. 123 is connected, the regulating member 13 includes a gasket 132 and a stopper 133, the gasket 132 includes an end face 1321 facing the output port 123, and a flow slot 134 extending from the end face 1321 toward the input port 122, the sub-channel 131 is surrounded by the flow slot 134 and the cavity wall of the second chamber 121, the stopper 133 is connected to the side wall 1322 of the gasket 132 facing the flow slot 134, and the stopper 133 is arranged at one end of the side wall 1322 close to the output port 123, and the gasket 132 includes at least two flow slots arranged at intervals. 134, or the regulating member 13 includes a partition 135, at least two partitions 135 are arranged at intervals along the extension direction of the output port 123, the sub-channel 131 is surrounded by the partition 135 and the cavity wall of the second chamber 121, and at least one of the first die head 11 and the second die head 12 is provided with a pressure equalizing groove 141 on the side surface facing the second cavity 121, the pressure equalizing groove 141 extends along the first direction X, the direction from the input port 122 to the output port 123 intersects with the first direction X, and the pressure equalizing groove 141 is connected to the sub-channel 131 and the input port 122.

[0119] In these embodiments, the coating die 1 includes a first die 11 and a second die 12, the first die 11 includes a first chamber 111 and a feed port 112 and a discharge port 113 which are connected to the first chamber 111 and are arranged opposite to each other, so that the slurry can enter the first chamber 111 through the feed port 112 and reach the coating position from the first chamber 111 through the discharge port 113, the outer surface of the first die 11 is provided with a groove 114, the second die 12 is connected to this surface, and the second die 12 covers the groove 114 to form a second chamber 121, the coating die 1 includes an input port 122 and an output port 123 which are arranged opposite to each other and connected to the second chamber 121, the input port 122 is used to connect to the pressure mechanism so that the external pressure passes through the input port 122 , the second chamber 121 and the output port 123 act on the slurry flowing out of the discharge port 113 to adjust the state of the slurry. Therefore, in the embodiment of the present application, the first die head 11 and the second die head 12 jointly enclose a pressure channel that can apply pressure to the slurry, which reduces the occupation of the second die head 12, that is, the pressure channel, on the outer space of the first die head 11, thereby reducing the difficulty of setting the second die head 12 on the first die head 11 and improving the overall reliability of the coating equipment; and the second chamber 121 is formed by the second die head 12 covering the groove 114 of the first die head 11, which can further reduce the volume of the second die head 12, so as to further reduce the difficulty of setting the second die head 12 on the first die head 11 and improve the overall reliability of the coating equipment.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating die head, characterized in that: include: A first die head comprises a first chamber and a feed port and a discharge port which are connected to and opposite to the first chamber, so that the slurry can reach the discharge port via the feed port and the first chamber, and a groove is arranged on the outer surface of the first die head; A second die head is connected to a side surface of the first die head where the groove is provided, and the second die head covers the groove to form a second chamber. Wherein, the coating die head comprises an input port and an output port which are arranged opposite to each other and communicated with the second chamber, and the input port is used to be connected with a pressure mechanism so that the second die head can apply pressure to the slurry flowing out of the discharge port through the output port.

2. The coating die head according to claim 1, characterized in that: The coating die head includes an adjusting member, which is arranged in the second chamber and abuts against the first die head and the second die head. At least a portion of the cavity wall of the second chamber and the adjusting member enclose a sub-channel, and the sub-channel is connected to the input port and the output port.

3. The coating die head according to claim 2, characterized in that: The regulating member includes a gasket, which includes an end surface facing the output port and a flow groove extending from the end surface toward the input port, and the sub-channel is surrounded by the flow groove and the cavity wall of the second chamber.

4. The coating die head according to claim 3, characterized in that: The gasket includes at least two flow grooves arranged at intervals.

5. The coating die head according to claim 3, characterized in that: The cross-sectional area of ​​the circulation groove tends to increase along the direction from the input port to the output port, or the cross-sectional area of ​​the circulation groove tends to increase from the output port to the input port.

6. The coating die head according to claim 3, characterized in that: The regulating member comprises a stopper connected to the side wall of the gasket facing the flow slot, and the stopper is arranged at one end of the side wall close to the output port.

7. The coating die head according to claim 2, characterized in that: The regulating member comprises a partition, at least two of the partitions are arranged at intervals along the extending direction of the outlet, and the sub-channel is formed by enclosing the partition and the cavity wall of the second chamber.

8. The coating die head according to any one of claims 2 to 7, characterized in that: At least one of the first die head and the second die head is provided with a pressure equalizing groove on a side surface facing the second chamber, the pressure equalizing groove extends along a first direction, the direction from the input port to the output port intersects with the first direction, and the pressure equalizing groove is connected to the sub-channel and the input port.

9. The coating die head according to claim 1, characterized in that: The first die head includes a first sub-die head and a second sub-die head, the first cavity is formed by splicing the first sub-die head and the second sub-die head, the second cavity is formed by splicing the second sub-die head and the second die head, the second sub-die head includes a first surface facing the first cavity and a second surface facing the second cavity respectively, and an angle θ between the first surface and the second surface satisfies 0<θ<90°.

10. The coating die head according to claim 1, characterized in that: The coating die head includes a cover plate, which is rotatably connected to the second die head so that the cover plate can rotate relative to the second die head between a first position and a second position. The cover plate is located at the first position and covers the output port. The cover plate is located at the second position and a gap is formed between the cover plate and the first die head, and the gap is connected to the second chamber.

11. A coating device, characterized in that: The coating die comprises the coating die head according to any one of claims 1 to 10.

Images