Coating die head and coating machine

Abstract

The utility model discloses a coating die head and a coating machine, the coating die head comprises a first slurry runner, a second slurry runner and a glue solution runner, the first slurry runner, the second slurry runner and the glue solution runner all extend along a first direction and are arranged at one end of the first direction, the first slurry runner is provided with a first discharge port, the second slurry runner is provided with a second discharge port, and the glue solution runner is provided with a second discharge port. The glue liquid flow channel is provided with glue outlets, the first discharging port and the second discharging port are arranged at intervals in the second direction, the number of the glue outlets is at least two in the third direction, the two glue outlets are formed in the two sides of the first discharging port, and the first direction, the second direction and the third direction are perpendicular to each other in pairs. According to the coating die head provided by the embodiment of the invention, the current collector of the battery is synchronously coated with the first slurry, the second slurry and the glue solution, so that the multi-layer coating and gluing efficiency can be improved.

Description

Technical Field

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

[0002] In related technologies, as lithium battery applications continue to increase, so too do the requirements for them. To enhance battery safety, a functional coating is typically applied to the surface or underside of the active material layer of the current collector. Sometimes, glue is also applied to the edges of the functional coating to achieve isolation and insulation. However, most coating dies perform glue application and coating separately, which increases the total time and reduces coating efficiency. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a coating die head that can simultaneously coat a first slurry, a second slurry, and a glue solution on a battery current collector, thereby improving the efficiency of multi-layer coating and glue application.

[0004] According to the coating die of the embodiment of the first aspect of the present application, the coating die includes a first slurry flow channel, a second slurry flow channel and a glue flow channel, the first slurry flow channel, the second slurry flow channel and the glue flow channel all extend along the first direction, and at one end of the first direction, the first slurry flow channel has a first discharge port, the second slurry flow channel has a second discharge port, and the glue flow channel has a glue discharge port, in the second direction, the first discharge port and the second discharge port are spaced apart, in the third direction, there are at least two glue discharge ports, and the two glue discharge ports are arranged on both sides of the first discharge port, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0005] According to the coating die of the embodiment of the present application, a glue coating is coated on both sides of the first slurry coating of the battery current collector along the third direction, thereby reducing the phenomenon of lithium deposition at the edge of the current collector; the second slurry is coated on the first slurry coating and the glue coating, and the second slurry can cover the first slurry coating and the glue coating, thereby making the first slurry coating and the glue coating level, reducing the problem of uneven thickness of the current collector after coating; the first slurry, the second slurry and the glue are simultaneously coated on the battery current collector, which can improve the efficiency of multi-layer coating and gluing.

[0006] In some embodiments, the glue flow channel includes a first glue flow channel and a second glue flow channel arranged on both sides of the third direction of the first slurry flow channel, the first glue flow channel has a first glue outlet, the second glue flow channel has a second glue outlet, and the first glue outlet and the second glue outlet are respectively arranged on both sides of the third direction of the first outlet.

[0007] In this embodiment, by setting the first glue flow channel and the second glue flow channel on both sides of the third direction of the first slurry flow channel, during the coating process, the glue can be coated on the collector simultaneously and symmetrically on both sides of the first slurry layer to improve the uniformity and stability of the glue coating.

[0008] In some embodiments, the first glue flow channel and the second glue flow channel both include a first flow channel and a second flow channel, the first flow channel is parallel to the first slurry flow channel, one end of the second flow channel is connected to the first flow channel, and the other end is inclined toward the direction of the first discharge port, and in the third direction, the first glue outlet and the second glue outlet are both spaced apart from the first discharge port.

[0009] This embodiment provides a first glue liquid flow channel and a second glue liquid flow channel, both of which include a connected first flow channel and a second flow channel, wherein the first flow channel is parallel to the first slurry flow channel, and one end of the second flow channel is inclined toward the direction of the first discharge port, so that the glue liquid obtains a certain speed and direction when it approaches the coating area, thereby improving the efficiency and accuracy of the glue coating; and the first glue outlet and the second glue outlet are both separated from the first discharge port, reducing the risk of the glue liquid flowing out of the first glue outlet and the second glue outlet flowing to the first discharge port.

[0010] In some embodiments, in a projection plane perpendicular to the second direction, the projections of the glue outlets and the first outlet, which are arranged in pairs on both sides of the first outlet, are both located within the projection of the second outlet.

[0011] In this embodiment, two glue outlets are set on both sides of the first outlet, and the projection of the first outlet is located within the projection of the second outlet, so that the second slurry coating can be completely covered by the first slurry coating and the glue coating, and the thickness of the first slurry coating and the glue coating can be completely leveled, thereby improving the flatness of the slurry coating and the glue coating after the current collector is coated, reducing the problem of uneven thickness after the first slurry and glue coating is completed, and can also control the thickness of the first slurry coating, the second slurry coating and the glue coating, so that the edge performance of the current collector is enhanced or weakened compared to the main body, which can meet the design requirements of different areas.

[0012] In some embodiments, there are multiple first discharge ports, and in a projection plane perpendicular to the second direction, at least part of the projection of two adjacent first discharge ports and the projection of the glue discharge port between the two first discharge ports are both located within the projection of the second discharge port.

[0013] In this embodiment, by being arranged in a projection plane perpendicular to the second direction, at least part of the projection of the two adjacent first discharge ports and the projection of the glue port between the two first discharge ports are both located within the projection of the second discharge port, so that the second slurry coating layer can be completely located to cover the first slurry coating layer and the glue coating layer, and the thickness of the first slurry coating layer and the glue coating layer can be completely leveled, thereby improving the flatness of the slurry coating layer and the glue coating layer after the current collector is coated, reducing the problem of uneven thickness after the first slurry and glue coating are completed, and can also control the thickness of the first slurry coating layer, the second slurry coating layer and the glue coating layer, so as to achieve enhanced or weakened edge performance of the current collector compared to the main body, thereby meeting the design requirements of different areas.

[0014] In some embodiments, the first feed port of the first slurry flow channel, the second feed port of the second slurry, and the glue inlet of the glue flow channel are all located on the other side of the coating die head in the first direction.

[0015] In this embodiment, the first feed port, the second feed port and the glue feed port are located on the other side of the coating die head in the first direction, and are arranged opposite to the first discharge port, the second discharge port and the glue discharge port, which is conducive to forming a smooth material conveying path, making it convenient for operators to observe and control the feeding process, and is also beneficial to the overall layout and maintenance of the equipment, and is conducive to improving the efficiency and operability of the coating operation.

[0016] In some embodiments, the coating die head includes: a first module, a second module, a third module, a first gasket and a second gasket, the second module is located between the first module and the third module; the first gasket is clamped between the first module and the second module, and the second gasket is clamped between the second module and the third module.

[0017] In this embodiment, the coating die head is composed of a first module, a second module, a third module, a first gasket and a second gasket 25, thereby improving the flexibility of use and the convenience of maintenance of the coating die head.

[0018] In some embodiments, the first slurry flow path includes a first slurry channel disposed in the first module, a first slurry trough disposed on the first gasket, and the first discharge port, and the first slurry channel, the first slurry trough, and the first discharge port are connected in sequence.

[0019] In this embodiment, the first slurry flow channel is defined between the first module and the second module, so that the flow direction of the first slurry in the first slurry flow channel can be limited.

[0020] In some embodiments, the second slurry flow path includes a second slurry channel arranged in the third module, a second slurry trough arranged on the second gasket, and the second discharge port, and the second slurry channel, the second slurry trough and the second discharge port are connected in sequence.

[0021] In some embodiments, the glue flow channel includes a glue channel arranged in the second module, a glue tank arranged on the first gasket and the glue outlet, and the glue channel, the glue tank and the glue outlet are connected in sequence; or, the glue flow channel includes a first glue channel arranged in the second module, a second glue channel arranged in the third module, a glue tank arranged on the first gasket and the glue outlet, and the second glue channel, the first glue channel, the glue tank and the glue outlet are connected in sequence.

[0022] In this embodiment, the second slurry flow channel is defined between the second module and the third module, so that the flow direction of the second slurry in the second slurry tank can be limited.

[0023] In this embodiment, a coating die is arranged to consist of a first module, a second module, a third module, a first gasket and a second gasket, and a first slurry flow channel, a second slurry flow channel and a glue flow channel are arranged thereon, which is convenient for assembly, disassembly, maintenance and replacement of the coating die, and improves the flexibility of use and convenience of maintenance of the coating die.

[0024] In this embodiment, by defining a glue flow channel between the second module and the third module, the flow direction of the glue in the glue flow channel can be limited.

[0025] In some embodiments, the second direction is an up-down direction, and the first module, the second module and the third module are arranged in sequence from bottom to top, or the first module, the second module and the third module are arranged in sequence from top to bottom.

[0026] In this embodiment, the first module, the second module and the third module are arranged in sequence from bottom to top, or the first module, the second module and the third module are arranged in sequence from top to bottom. The relative positions of the first module, the second module, the third module, the first gasket and the second gasket can be adjusted according to different usage requirements, thereby providing a variety of usage methods for the coating die head.

[0027] According to the coating machine of the second aspect embodiment of the present application, it includes: a back roller, which is used to carry the current collector of the battery; a coating die head according to the above-mentioned first aspect embodiment of the present application; a first feeding module, which is used to provide spraying slurry toward the first slurry flow channel; a second feeding module, which is used to provide spraying slurry toward the second slurry flow channel; and a third feeding module, which is used to provide glue toward the glue flow channel.

[0028] According to the coating machine of the embodiment of the present application, by setting the above-mentioned coating die head, two different slurries are coated on the local and middle of the current collector, which can correspondingly achieve the edge performance of the current collector to be enhanced or weakened compared with the main body, thereby reducing the phenomenon of lithium deposition at the edge of the current collector; the second slurry can cover the first slurry coating and the glue coating, thereby making the first slurry coating and the glue coating level, reducing the problem of uneven thickness after the current collector is coated; the first slurry, the second slurry and the glue are simultaneously coated on the current collector of the battery, which can improve the efficiency of multi-layer coating and glue coating.

[0029] In some embodiments, the first feeding module, the second feeding module, and the third feeding module all include a screw pump.

[0030] In this embodiment, the first feeding module, the second feeding module and the third feeding module all include screw pumps to achieve reliable and continuous delivery of the first slurry, the second slurry and the glue, thereby ensuring smooth operation of the coating machine.

[0031] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 is a schematic diagram of a coating machine according to some embodiments of the present application;

[0034] Figure 2 is a schematic diagram of a coating die according to some embodiments of the present application;

[0035] Figure 3 is a perspective view of a coating die according to some embodiments of the present application;

[0036] Figure 4 yes Figure 3 A perspective view of a coating die in FIG;

[0037] Figure 5is a schematic diagram of a third module according to some embodiments of the present application;

[0038] Figure 6 is a schematic diagram of a second module according to some embodiments of the present application;

[0039] Figure 7 is a schematic diagram of a first module according to some embodiments of the present application;

[0040] Figure 8 is a schematic diagram of a first gasket according to some embodiments of the present application;

[0041] Figure 9 yes Figure 8 A top view of the first gasket;

[0042] Figure 10 is a schematic diagram of a second gasket according to some embodiments of the present application;

[0043] Figure 11 yes Figure 10 A top view of the second gasket;

[0044] Figure 12 is a schematic diagram of the current collector after coating according to the first embodiment of the present application;

[0045] Figure 13 is a schematic diagram of the current collector after coating according to the second embodiment of the present application;

[0046] Figure 14 is a schematic diagram of the current collector after coating according to the third embodiment of the present application;

[0047] Figure 15 This is a schematic diagram of the current collector after coating according to the fourth embodiment of the present application.

[0048] Reference numerals:

[0049] 100. Coating machine;

[0050] 11. Back roller; 12. First feeding module; 13. Second feeding module; 14. Third feeding module; 15. Screw pump;

[0051] 20. Coating die head;

[0052] 21. First module; 211. First slurry channel;

[0053] 22. Second module; 221. Glue channel;

[0054] 23. The third module; 231. The second slurry channel;

[0055] 24, first gasket; 241, first slurry tank; 242, first discharge port; 243, glue tank; 244, glue discharge port;

[0056] 25. Second gasket; 251. Second slurry tank; 252. Second discharge port;

[0057] 31. First glue flow channel; 32. Second glue flow channel; 321. First flow channel; 322. Second flow channel; 323. Glue inlet; 33. First slurry flow channel; 331. First feed inlet; 34. Second slurry flow channel; 341. Second feed inlet; 41. First slurry coating layer; 42. Second slurry coating layer; 43. Glue coating layer. DETAILED DESCRIPTION

[0058] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0059] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0061] Currently, market developments indicate that power batteries are becoming increasingly widespread. They are used not only in energy storage systems such as hydropower, thermal, wind, and solar power plants, but also in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing. Lithium-ion batteries are increasingly accounting for a larger share of the power batteries currently in use.

[0062] As the application of lithium batteries continues to increase, the requirements for lithium batteries are also getting higher and higher. Under the premise of ensuring good safety, cycle life and rate performance, the demand for continuously developing lithium batteries with high energy density and low production cost is becoming more and more urgent. In the related art, multi-layer coating is used in the production of lithium batteries, which not only improves the energy density of the battery but also enhances the safety of the battery. In order to enhance the safety performance of the battery, a functional coating is generally provided on the surface or bottom surface of the active material layer of the current collector. Sometimes it is also necessary to apply glue on the edge of the functional coating. By applying the glue layer on the edge of the functional coating, the functional coating can be isolated and insulated.

[0063] The coating die head can only complete single-layer coating on one side at a time, and glue coating and coating are performed separately, and multi-layer coating and glue coating are achieved by reciprocating multiple times. This method has low production efficiency, prolongs the total coating and glue coating time, and reduces the coating and glue coating efficiency.

[0064] Based on the above considerations, in order to improve the efficiency of multi-layer coating and gluing of the coating die, a coating die is designed, which has a first slurry flow channel, a second slurry flow channel and a glue flow channel. In the second direction, the first discharge port of the first slurry flow channel and the second discharge port of the second slurry flow channel are spaced apart. In the third direction, the glue flow channel has two discharge ports, which are respectively arranged on both sides of the first discharge port. The first slurry, the second slurry and the glue are simultaneously coated on the current collector of the battery, which can improve the efficiency of multi-layer coating and gluing.

[0065] The coating die disclosed in the embodiments of the present application can be used to coat the current collector of a battery, which is then structured into a pole piece. The pole piece can be used in a battery cell, which can be used as an electrical device that is a power source, or various energy storage systems that use batteries as energy storage elements. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0066] Reference below Figures 1-15The coating die 20 according to the first embodiment of the present application is described. Figure 1 is a schematic diagram of a coating machine 100 according to some embodiments of the present application, Figure 2 is a schematic diagram of a coating die 20 according to some embodiments of the present application, Figure 3 is a perspective view of a coating die 20 according to some embodiments of the present application. Figure 4 yes Figure 3 A perspective view of the coating die 20 in FIG. Figure 5 is a schematic diagram of the third module 23 according to some embodiments of the present application, Figure 6 is a schematic diagram of the second module 22 according to some embodiments of the present application, Figure 7 is a schematic diagram of the first module 21 according to some embodiments of the present application, Figure 8 is a schematic diagram of the first gasket 24 according to some embodiments of the present application, Figure 9 yes Figure 8 A top view of the first gasket 24, Figure 10 is a schematic diagram of the second gasket 25 according to some embodiments of the present application, Figure 11 yes Figure 10 A top view of the second gasket 25, Figure 12 This is a schematic diagram of the current collector after coating according to the first embodiment of the present application. Figure 13 is a schematic diagram of the current collector after coating according to the second embodiment of the present application, Figure 14 is a schematic diagram of the current collector after coating according to the third embodiment of the present application, Figure 15 This is a schematic diagram of the current collector after coating according to the fourth embodiment of the present application.

[0067] According to the coating die 20 of the first aspect of the present application, the coating die 20 includes a first slurry flow channel 33, a second slurry flow channel 34 and a glue flow channel, and the first slurry flow channel 33, the second slurry flow channel 34 and the glue flow channel are all along the first direction (for example, refer to the attached Figure 3 The coating die 20 extends in the X direction shown in FIG, and the width direction of the coating die 20, and at one end of the first direction, the first slurry flow channel 33 has a first discharge port 242, the second slurry flow channel 34 has a second discharge port 252, the glue flow channel has a glue discharge port 244, and in the second direction (for example, refer to FIG. Figure 3 In the Z direction shown in FIG, that is, the height direction of the coating die head 20, the first discharge port 242 and the second discharge port 252 are spaced apart from each other, and in the third direction (for example, referring to FIG. Figure 3 In the Y direction shown in the figure, that is, the length direction of the coating die 20, there are at least two glue outlets 244, and the two glue outlets 244 are respectively arranged on both sides of the first discharge port 242, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0068] Exemplarily, the battery includes a current collector, which requires a coating die 20 to coat the current collector. The coating die 20 includes a first slurry flow channel 33, a second slurry flow channel 34, and a glue flow channel. The first slurry flow channel 33, the second slurry flow channel 34, and the glue flow channel all extend along a first direction. At one end in the first direction, the first slurry flow channel 33 has a first discharge port 242, the second slurry flow channel 34 has a second discharge port 252, and the glue flow channel has a glue discharge port 244. The current collector is located at one end in the first direction of the coating die 20 and is arranged opposite to the first discharge port 242, the second discharge port 252, and the glue discharge port 244.

[0069] The first slurry in the first slurry flow channel 33 can flow in the first slurry flow channel 33 along the first direction to the first discharge port 242, and flow to the collector through the first discharge port 242 for coating the collector; the second slurry in the second slurry flow channel 34 can flow in the second slurry flow channel 34 along the first direction to the second discharge port 252, and flow to the collector through the second discharge port 252 for coating the collector; the glue in the glue flow channel can flow in the glue flow channel along the first direction to the glue discharge port 244, and flow to the collector through the glue discharge port 244 for coating the collector.

[0070] In the second direction, the first discharge port 242 and the second discharge port 252 are spaced apart from each other. In the third direction, there are at least two glue discharge ports 244. There may be two glue discharge ports 244, or there may be more than two glue discharge ports 244, that is, there may be three, four, or five glue discharge ports 244, and the two glue discharge ports 244 are oppositely arranged on either side of the first discharge port 242. If there are two glue discharge ports 244, one glue discharge port 244 is arranged on one side of the first discharge port 242 in the third direction, and the other glue discharge port 244 is arranged on the other side of the first discharge port 242 in the third direction. If there are more than two glue discharge ports 244, one glue discharge port 244 may be arranged on one side of the first discharge port 242 in the third direction, and the remaining glue discharge ports 244 may be arranged on the other side of the first discharge port 242 in the third direction. This design enables the simultaneous output of two different slurries and the precise application of glue during the same coating process, thereby achieving coating and effective bonding of the current collector.

[0071] The first slurry is directly coated on the current collector to form a first slurry coating 41, and the glue is coated on both sides of the first slurry coating 41 in the third direction to form a glue coating 43, which reduces the phenomenon of lithium deposition at the edge of the current collector; the second slurry is coated on the first slurry coating 41 and the glue coating 43 to form a second slurry coating 42. By coating the second slurry on the first slurry coating 41 and the glue coating 43, the second slurry can cover the first slurry coating 41 and the glue coating 43, thereby making the first slurry coating 41 and the glue coating 43 level, reducing the problem of uneven thickness after the current collector is coated.

[0072] The first direction, the second direction and the third direction are perpendicular to each other.

[0073] According to the coating die 20 of the embodiment of the present application, a glue coating 43 is coated on both sides of the first slurry coating 41 of the battery's current collector along the third direction, thereby reducing the phenomenon of lithium deposition at the edge of the current collector; the second slurry is coated on the first slurry coating 41 and the glue coating 43, and the second slurry can cover the first slurry coating 41 and the glue coating 43, thereby making the first slurry coating 41 and the glue coating 43 level, thereby reducing the problem of uneven thickness of the current collector after coating; the first slurry, the second slurry and the glue are simultaneously coated on the battery's current collector, which can improve the efficiency of multi-layer coating and the efficiency of glue coating.

[0074] In some embodiments, as Figure 2-Figure 11 As shown, the glue flow channel includes a first glue flow channel 31 and a second glue flow channel 32 arranged on both sides of the third direction of the first slurry flow channel 33. The first glue flow channel 31 has a first glue outlet, and the second glue flow channel 32 has a second glue outlet. The first glue outlet and the second glue outlet are respectively arranged on both sides of the third direction of the first discharge port 242.

[0075] Illustratively, the glue in the first glue flow channel 31 can flow to the current collector through the first glue outlet, and the glue in the second glue flow channel 32 can flow to the current collector through the second glue outlet. During the coating process, the glue can be coated on the current collector simultaneously and symmetrically on both sides of the first slurry layer to improve the uniformity and stability of the coating.

[0076] In this embodiment, by setting the first glue flow channel 31 and the second glue flow channel 32 on both sides of the third direction of the first slurry flow channel 33, during the coating process, the glue can be coated on the collector simultaneously and symmetrically on both sides of the first slurry layer to improve the uniformity and stability of the glue coating.

[0077] In some embodiments, as Figure 2-Figure 11 As shown, the first glue flow channel 31 and the second glue flow channel 32 both include a first flow channel 321 and a second flow channel 322. The first flow channel 321 is parallel to the first slurry flow channel 33. One end of the second flow channel 322 is connected to the first flow channel 321, and the other end is inclined toward the direction of the first discharge port 242. In the third direction, the first glue outlet and the second glue outlet are both separated from the first discharge port 242.

[0078] Exemplarily, the first glue flow channel 31 and the second glue flow channel 32 are both composed of two connected first flow channels 321 and second flow channels 322. The first flow channel 321 is parallel to the first slurry flow channel 33, that is, the flow direction of the glue in the first flow channel 321 is the same as the flow direction of the first slurry in the first slurry flow channel 33; the other end of the second flow channel 322 is inclined toward the direction of the first discharge port 242, so that the glue obtains a certain speed and direction when approaching the coating area, thereby improving the efficiency and accuracy of the glue coating; and the first glue outlet and the second glue outlet are both separated from the first glue outlet 242, reducing the risk of the glue flowing out of the first glue outlet and the second glue outlet flowing to the first discharge port 242.

[0079] For example, the angle between the sidewall of the first flow channel 321 and the sidewall of the second flow channel 322 may be an acute angle.

[0080] In this embodiment, the first glue flow channel 31 and the second glue flow channel 32 both include a connected first flow channel 321 and a second flow channel 322. The first flow channel 321 is parallel to the first slurry flow channel 33, and one end of the second flow channel 322 is inclined toward the first discharge port 242, so that the glue liquid obtains a certain speed and direction when it approaches the coating area, thereby improving the efficiency and accuracy of the glue coating; and the first glue outlet and the second glue outlet are both separated from the first discharge port 242, reducing the risk of the glue liquid flowing out of the first glue outlet and the second glue outlet flowing toward the first discharge port 242.

[0081] In some embodiments, as Figures 1-15 As shown, in the projection plane perpendicular to the second direction, the two glue outlets 244 provided on both sides of the first outlet 242 and the projection of the first outlet 242 are both located within the projection of the second outlet 252 .

[0082] For example, Figure 12 As shown, the first slurry is coated onto the current collector from the first discharge port 242, and the glue is coated onto the current collector from two discharge ports 244 arranged on both sides of the first discharge port 242. The glue coating 43 is located on both sides of the first slurry coating 41 in the third direction. The second slurry is coated on the first slurry coating 41 and the glue coating 43. The second slurry coating 42 can completely cover the first slurry coating 41 and the glue coating 43, and can completely level the thickness of the first slurry coating 41 and the glue coating 43, thereby improving the flatness of the slurry coating and the glue coating 43 after coating the current collector.

[0083] like Figure 13As shown, the second slurry is directly coated onto the current collector, the first slurry is coated onto the second slurry coating 42, and the glue is coated onto the second slurry coating 42 and is located on both sides of the first slurry coating 41 in the third direction. The thickness of the first slurry coating 41, the second slurry coating 42, and the glue coating 43 can be controlled by adjusting the flow rates of the first slurry in the first slurry flow channel 33, the second slurry in the second slurry flow channel 34, and the glue in the glue flow channel. The thickness of the glue coating 43 can be greater than that of the first slurry coating 41, so that the edge performance of the current collector is enhanced or weakened compared to the main body to meet the design requirements of different areas.

[0084] In this embodiment, two glue outlets 244 are set on both sides of the first outlet 242, and the projection of the first outlet 242 is located within the projection of the second outlet 252, so that the second slurry coating 42 can be completely located to cover the first slurry coating 41 and the glue coating 43, and the thickness of the first slurry coating 41 and the glue coating 43 can be completely leveled, thereby improving the flatness of the slurry coating and the glue coating 43 after the current collector is coated, reducing the problem of uneven thickness after the first slurry and glue coating is completed, and can also control the thickness of the first slurry coating 41, the second slurry coating 42 and the glue coating 43, so that the edge performance of the current collector is enhanced or weakened compared to the main body, which can meet the design requirements of different areas.

[0085] In some embodiments, as Figures 1-15 As shown, there are multiple first discharge ports 242 , and in the projection plane perpendicular to the second direction, at least part of the projection of two adjacent first discharge ports 242 and the projection of the glue outlet 244 between the two first discharge ports 242 are both located within the projection of the second discharge port 252 .

[0086] Exemplarily, there are multiple first discharge ports 242, and each first discharge port 242 has a glue discharge port 244 on both sides along the third direction. At least part of the projection of two adjacent first discharge ports 242 and the projection of the glue discharge port 244 between the two first discharge ports 242 are both located within the projection of the second discharge port 252. It can be that a part of the projection of two adjacent first discharge ports 242 and the projection of the glue discharge port 244 between the two first discharge ports 242 are both located within the projection of the second discharge port 252; or it can be that the projection of two adjacent first discharge ports 242 and the projection of the glue discharge port 244 between the two first discharge ports 242 are both located within the projection of the second discharge port 252.

[0087] like Figure 14As shown, the glue is applied to the current collector from two glue outlets 244 between the two first outlets 242, and the first slurry is applied to the current collector from two adjacent first outlets 242, and is located on opposite sides of the glue coating 43 in the third direction; the second slurry is applied to the first slurry coating 41 and the glue coating 43, and the second slurry coating 42 can completely cover the first slurry coating 41 and the glue coating 43, and can completely level the thickness of the first slurry coating 41 and the glue coating 43, thereby improving the flatness of the slurry coating and the glue coating 43 after the current collector is applied. The thickness of the first slurry coating 41, the second slurry coating 42, and the glue coating 43 can also be controlled. The thickness of the glue coating 43 can be greater than that of the first slurry coating 41, so that the edge performance of the current collector is enhanced or weakened compared to the main body to meet the design requirements of different areas.

[0088] like Figure 15 As shown, the second slurry can be coated onto the current collector from the second discharge port 252, the glue is coated onto the current collector from the two discharge ports 244 between the two first discharge ports 242, and the first slurry is coated onto the second slurry coating 42 from the two adjacent first discharge ports 242, and is located on opposite sides of the glue coating 43 in the third direction. The thickness of the first slurry coating 41, the second slurry coating 42 and the glue coating 43 can be controlled. The thickness of the glue coating 43 can be greater than the thickness of the first slurry coating 41, so that the edge performance of the current collector is enhanced or weakened compared to the main body to meet the design requirements of different areas.

[0089] In this embodiment, by being arranged in a projection plane perpendicular to the second direction, at least part of the projection of the two adjacent first discharge ports 242 and the projection of the glue port 244 between the two first discharge ports 242 are both located within the projection of the second discharge port 252, so that the second slurry coating 42 can be completely located to cover the first slurry coating 41 and the glue coating 43, and the thickness of the first slurry coating 41 and the glue coating 43 can be completely leveled, thereby improving the flatness of the slurry coating and the glue coating 43 after the current collector is coated, reducing the problem of uneven thickness after the first slurry and glue coating are completed, and can also control the thickness of the first slurry coating 41, the second slurry coating 42 and the glue coating 43, so as to achieve enhanced or weakened edge performance of the current collector compared to the main body, thereby meeting the design requirements of different areas.

[0090] In some embodiments, as Figures 1-11 As shown, the first feed port 331 of the first slurry flow channel 33 , the second feed port 341 of the second slurry flow channel and the glue inlet 323 of the glue flow channel are all located on the other side of the coating die head 20 in the first direction.

[0091] Exemplarily, the first discharge port 242, the second discharge port 252 and the glue discharge port 244 are located on one side of the coating die 20 in the first direction, and the first feed port 331, the second feed port 341 and the glue discharge port 323 are located on the other side of the coating die 20 in the first direction. The first slurry flows from the first feed port 331 into the first slurry flow channel 33 and then flows out through the first discharge port 242 to coat the collector. The second slurry flows from the second feed port 341 into the second slurry flow channel 34 and then flows out through the second discharge port 252 to coat the collector. The glue flows from the glue feed port 323 into the glue flow channel and then flows out through the glue discharge port 244 to coat the collector.

[0092] The first feed port 331, the second feed port 341 and the glue feed port 323 are located on the other side of the coating die head 20 in the first direction, and are arranged opposite to the first discharge port 242, the second discharge port 252 and the glue discharge port 244, which is conducive to forming a smooth material conveying path, making it convenient for operators to observe and control the feeding process, and is also beneficial to the overall layout and maintenance of the equipment, and is conducive to improving the efficiency and operability of the coating operation.

[0093] In this embodiment, the first feed port 331, the second feed port 341 and the glue feed port 323 are located on the other side of the coating die head 20 in the first direction, and are arranged opposite to the first discharge port 242, the second discharge port 252 and the glue discharge port 244, which is conducive to forming a smooth material conveying path, making it convenient for operators to observe and control the feeding process, and is also beneficial to the overall layout and maintenance of the equipment, and is conducive to improving the efficiency and operability of the coating operation.

[0094] In some embodiments, as Figures 1-11 As shown, the coating die head 20 includes: a first module 21, a second module 22, a third module 23, a first gasket 24 and a second gasket 25, the second module 22 is located between the first module 21 and the third module 23; the first gasket 24 is clamped between the first module 21 and the second module 22, and the second gasket 25 is clamped between the second module 22 and the third module 23.

[0095] Exemplarily, the coating die 20 is composed of a first module 21, a second module 22, a third module 23, a first gasket 24 and a second gasket 25, wherein the second module 22 is located between the first module 21 and the third module 23, the first gasket 24 is clamped between the first module 21 and the second module 22, and the second gasket 25 is clamped between the second module 22 and the third module 23, which is conducive to the assembly, disassembly, maintenance and replacement of the coating die 20, and improves the flexibility of use and convenience of maintenance of the coating die 20.

[0096] For example, the first gasket 24 and the second gasket 25 are arranged at an angle, and the angle is an acute angle. Figure 2In a specific embodiment, the upper surface of the first module 21 and the lower surface of the second module 22 are both parallel to the horizontal plane, that is, the first gasket 24 is parallel to the horizontal plane. The surface of the second module 22 and the lower surface of the third module 23 are arranged at an angle to the horizontal plane, that is, the second gasket 25 is arranged at an angle, and the second slurry flow channel 34 extends in an inclined direction in the vertical direction, which can increase the flow rate of the second slurry in the second slurry flow channel 34.

[0097] In this embodiment, the coating die head 20 is composed of a first module 21, a second module 22, a third module 23, a first gasket 24 and a second gasket 25, thereby improving the use flexibility and maintenance convenience of the coating die head 20.

[0098] In some embodiments, as Figures 1-11 As shown, the first slurry flow channel 33 includes a first slurry channel 211 arranged in the first module 21, a first slurry tank 241 and a first discharge port 242 arranged on the first gasket 24, and the first slurry channel 211, the first slurry tank 241 and the first discharge port 242 are connected in sequence.

[0099] Exemplarily, the first slurry channel 211 extends along the third direction of the first module 21, the first slurry channel 211 is connected to the first slurry trough 241, the first slurry trough 241 is connected to the first outlet 242, the first slurry trough 241 is located on the first gasket 24, the first slurry trough 241 can pass through the first gasket 24 along the third direction of the first gasket 24, the first gasket 24 is clamped between the first module 21 and the second module 22, and the first module 21 and the second module 22 can limit the flow direction of the first slurry in the first slurry trough 241.

[0100] In this embodiment, the first slurry flow channel 33 is defined between the first module 21 and the second module 22 , so that the flow direction of the first slurry in the first slurry flow channel 33 can be limited.

[0101] In some embodiments, as Figures 1-11 As shown, the second slurry flow channel 34 includes a second slurry channel 231 arranged in the third module 23, a second slurry tank 251 and a second discharge port 252 arranged on the second gasket 25, and the second slurry channel 231, the second slurry tank 251 and the second discharge port 252 are connected in sequence.

[0102] Exemplarily, the second slurry channel 231 extends along the third direction of the third module 23, the second slurry channel 231 is connected to the second slurry trough 251, the second slurry trough 251 is connected to the second outlet 252, the second slurry trough 251 is located on the second gasket 25, the second slurry trough 251 can pass through the second gasket 25 along the third direction of the second gasket 25, the second gasket 25 is clamped between the second module 22 and the third module 23, and the second module 22 and the third module 23 can limit the flow direction of the second slurry in the second slurry trough 251.

[0103] In this embodiment, the second slurry flow channel 34 is defined between the second module 22 and the third module 23 , so as to limit the flow direction of the second slurry in the second slurry tank 251 .

[0104] In some embodiments, as Figures 1-11 As shown, the glue flow channel includes a glue channel 221 arranged in the second module 22, a glue tank 243 and a glue outlet 244 arranged on the first gasket 24, and the glue channel 221, the glue tank 243 and the glue outlet 244 are connected in sequence, or the glue flow channel includes a first glue channel 221 arranged in the second module 22, a second glue channel 221 arranged in the third module 23, a glue tank 243 and a glue outlet 244 arranged on the first gasket 24, and the second glue channel 221, the first glue channel 221, the glue tank 243 and the glue outlet 244 are connected in sequence.

[0105] For example, the first gasket 24 is further provided with a glue tank 243 and a glue outlet 244. The glue tank 243 is spaced apart from the first slurry tank 241. The glue tank 243 is a channel formed on the first gasket 24, and the second module 22 restricts the flow direction of the glue in the glue tank 243. Alternatively, the glue flow channel is connected by a first glue channel provided in the second module 22, a second glue channel provided in the third module 23, and the glue tank 243 on the first gasket 24, which can improve the practicality of the glue flow channel.

[0106] In this embodiment, by defining a glue flow channel between the second module 22 and the third module 23 , the flow direction of the glue in the glue flow channel can be limited.

[0107] In some embodiments, as Figures 1-11 As shown, the second direction is the up-down direction, and the first module 21, the second module 22 and the third module 23 are arranged in sequence from bottom to top, or the first module 21, the second module 22 and the third module 23 are arranged in sequence from top to bottom.

[0108] Exemplarily, when the first module 21, the second module 22 and the third module 23 are arranged in sequence from bottom to top, the first gasket 24 is located between the first module 21 and the second module 22, and the second gasket 25 is located between the second module 22 and the third module 23, that is, the first gasket 24 is located above the second gasket 25, and the first slurry flow channel 33 and the glue channel 221 are both located above the second slurry flow channel 34. When the coating die 20 coats the current collector, the second slurry is directly coated on the current collector, and the first slurry and the glue are coated on the second slurry.

[0109] When the first module 21, the second module 22 and the third module 23 are arranged in sequence from top to bottom, the second gasket 25 is located between the third module 23 and the second module 22, and the first gasket 24 is located between the second module 22 and the first module 21, that is, the second gasket 25 is located above the first gasket 24, and the second slurry flow channel 34 is located above the first slurry flow channel 33 and the glue channel 221. When the coating die 20 coats the current collector, the first slurry and glue are directly coated on the current collector, and the second slurry is coated on the first slurry and glue.

[0110] The relative positions of the first module 21 , the second module 22 , the third module 23 , the first gasket 24 and the second gasket 25 can be adjusted according to different usage requirements, thereby providing a variety of usage modes for the coating die head 20 .

[0111] In this embodiment, the first module 21, the second module 22 and the third module 23 are arranged in sequence from bottom to top, or the first module 21, the second module 22 and the third module 23 are arranged in sequence from top to bottom. The relative positions of the first module 21, the second module 22, the third module 23, the first gasket 24 and the second gasket 25 can be adjusted according to different usage requirements, thereby providing a variety of usage methods for the coating die head 20.

[0112] According to the second aspect embodiment of the present application, the coating machine 100 includes: a back roller 11, the back roller 11 is used to carry the current collector of the battery; the coating die head 20 according to the above-mentioned first aspect embodiment of the present application; a first feeding module 12, the first feeding module 12 is used to provide spraying slurry toward the first slurry flow channel 33; the second feeding module 13, the second feeding module 13 is used to provide spraying slurry toward the second slurry flow channel 34; and the third feeding module 14, the third feeding module 14 is used to provide glue toward the glue flow channel.

[0113] Exemplarily, the back roller 11 is used to carry the current collector of the battery and is arranged adjacent to the first discharge port 242, the second discharge port 252 and the glue discharge port 244. When the coater 100 is working, the back roller 11 is used to stably and flatly support and transport the current collector to ensure that the slurry or glue can be evenly and accurately coated on its surface.

[0114] The first feeding module 12, the second feeding module 13 and the third feeding module 14 can all be arranged on one side of the third direction of the coating die head 20, opposite to the back roller 11. The first feeding module 12 can provide the first slurry for the first slurry flow channel 33, the second feeding module 13 can provide the second slurry for the second slurry flow channel 34, and the third feeding module 14 can provide glue for the glue flow channel.

[0115] According to the coating machine 100 of the embodiment of the present application, by setting the above-mentioned coating die 20, two different slurries are coated on the local and middle of the current collector, which can correspondingly achieve the edge performance of the current collector to be enhanced or weakened compared with the main body, and can also reduce the phenomenon of lithium deposition at the edge of the current collector; the second slurry can cover the first slurry coating 41 and the glue coating 43, so that the first slurry coating 41 and the glue coating 43 are leveled, reducing the problem of uneven thickness of the current collector after coating; the first slurry, the second slurry and the glue are simultaneously coated on the current collector of the battery, which can improve the efficiency of multi-layer coating and glue coating.

[0116] In some embodiments, as Figure 1 As shown, the first feeding module 12 , the second feeding module 13 and the third feeding module 14 all include a screw pump 15 .

[0117] For example, the spiral pump 15 of the first feeding module 12 can be used not only to stir the first slurry in the first feeding module 12, but also to transport the first slurry; the spiral pump 15 of the second feeding module 13 can be used not only to stir the second slurry in the second feeding module 13, but also to transport the second slurry; the spiral pump 15 of the third feeding module 14 can be used not only to stir the glue in the third feeding module 14, but also to transport the glue; so as to achieve reliable and continuous transportation of the first slurry, the second slurry and the glue, and ensure the smooth operation of the coating machine 100.

[0118] In this embodiment, the first feeding module 12 , the second feeding module 13 and the third feeding module 14 all include a screw pump 15 to achieve reliable and continuous delivery of the first slurry, the second slurry and the glue, thereby ensuring smooth operation of the coating machine 100 .

[0119] The following will refer to Figures 1-15 A coating die 20 and a coating machine 100 having the same according to a specific embodiment of the present application are described.

[0120] The coating machine 100 includes a back roller 11, a coating die 20, a first feeding module 12, a second feeding module 13 and a third feeding module 14. The back roller 11 is used to carry the current collector of the battery, the coating die 20 is used to coat the current collector, the first feeding module 12 is used to provide spraying slurry toward the first slurry flow channel 33, the second feeding module 13 is used to provide spraying slurry toward the second slurry flow channel 34, and the third feeding module 14 is used to provide glue toward the glue flow channel.

[0121] The coating die 20 includes a first module 21, a second module 22, a third module 23, a first gasket 24 and a second gasket 25. The second module 22 is located between the first module 21 and the third module 23; the first gasket 24 is clamped between the first module 21 and the second module 22, and the second gasket 25 is clamped between the second module 22 and the third module 23. The first module 21, the second module 22 and the third module 23 are arranged in sequence from bottom to top, or the first module 21, the second module 22 and the third module 23 are arranged in sequence from top to bottom.

[0122] The coating die head 20 has a first slurry flow channel 33, a second slurry flow channel 34, and a glue flow channel. The first slurry flow channel 33 includes a first slurry channel 211 provided in the first module 21, a first slurry tank 241 provided on the first gasket 24, and a first discharge port 242. The first slurry channel 211, the first slurry tank 241, and the first discharge port 242 are sequentially connected. The second slurry flow channel 34 includes a second slurry channel 231 provided in the third module 23, a second slurry tank 251 provided on the second gasket 25, and a second discharge port 252. The second slurry channel 231, the second slurry tank 251, and the second discharge port 252 are sequentially connected. The glue flow channel includes a glue channel 221 arranged in the second module 22, a glue tank 243 and a glue outlet 244 arranged on the first gasket 24, and the glue channel 221, the glue tank 243 and the glue outlet 244 are connected in sequence, or the glue flow channel includes a first glue channel 221 arranged in the second module 22, a second glue channel 221 arranged in the third module 23, a glue tank 243 and a glue outlet 244 arranged on the first gasket 24, and the second glue channel 221, the first glue channel 221, the glue tank 243 and the glue outlet 244 are connected in sequence.

[0123] The first material outlet 242 , the second material outlet 252 and the glue outlet 244 are located on one side of the coating die head 20 in the first direction, and the first material inlet 331 , the second material inlet 341 and the glue inlet 323 are located on the other side of the coating die head 20 in the first direction.

[0124] In the projection plane perpendicular to the second direction, the two glue outlets 244 provided on both sides of the first outlet 242 and the projection of the first outlet 242 are both located within the projection of the second outlet 252 .

[0125] There are multiple first discharge ports 242 . In the projection plane perpendicular to the second direction, at least part of the projection of two adjacent first discharge ports 242 and the projection of the glue discharge port 244 between the two first discharge ports 242 are both located within the projection of the second discharge port 252 .

[0126] The coating die 20 can coat the current collector in four different embodiments:

[0127] Example 1: Figure 12 As shown, the first slurry is coated onto the current collector from the first discharge port 242, and the glue is coated onto the current collector from two discharge ports 244 arranged on both sides of the first discharge port 242. The glue coating 43 is located on both sides of the first slurry coating 41 in the third direction. The second slurry is coated on the first slurry coating 41 and the glue coating 43. The second slurry coating 42 can completely cover the first slurry coating 41 and the glue coating 43.

[0128] Example 2: Figure 13 As shown, the second slurry is directly coated onto the current collector, the first slurry is coated onto the second slurry coating 42, and the glue is coated onto the second slurry coating 42 and is located on both sides of the first slurry coating 41 in the third direction. The thickness of the first slurry coating 41, the second slurry coating 42, and the glue coating 43 can be controlled by adjusting the flow rates of the first slurry in the first slurry flow channel 33, the second slurry in the second slurry flow channel 34, and the glue in the glue flow channel. The thickness of the glue coating 43 can be greater than that of the first slurry coating 41, so that the edge performance of the current collector is enhanced or weakened compared to the main body to meet the design requirements of different areas.

[0129] Example 3: Figure 14 As shown, the glue is coated on the current collector from two glue outlets 244 between the two first outlets 242, and the first slurry is coated on the current collector from two adjacent first outlets 242, and is located on opposite sides of the glue coating 43 in the third direction; the second slurry is coated on the first slurry coating 41 and the glue coating 43, and the second slurry coating 42 can completely cover the first slurry coating 41 and the glue coating 43. The thickness of the first slurry coating 41, the second slurry coating 42 and the glue coating 43 can be controlled by adjusting the flow rate of the first slurry in the first slurry flow channel 33, the second slurry in the second slurry flow channel 34, and the glue in the glue flow channel. The thickness of the first slurry coating 41, the second slurry coating 42 and the glue coating 43 can be controlled. The thickness of the glue coating 43 can be greater than that of the first slurry coating 41, so that the edge performance of the current collector is enhanced or weakened compared to the main body to meet the design requirements of different areas.

[0130] Example 4: Figure 15 As shown, the second slurry can be applied to the current collector from the second outlet 252, the glue can be applied to the second slurry coating 42 from the two outlets 244 between the two first outlets 242, and the first slurry can be applied to the second slurry coating 42 from the two adjacent first outlets 242, and located on opposite sides of the glue coating 43 in the third direction. The thickness of the first slurry coating 41, the second slurry coating 42, and the glue coating 43 can be controlled. The thickness of the glue coating 43 can be greater than that of the first slurry coating 41, so that the edge performance of the current collector is enhanced or weakened compared to the main body to meet the design requirements of different areas.

[0131] In the description of this specification, reference to the terms "some embodiments," "optionally," "further," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0132] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A coating die head (20), characterized in that: The coating die head (20) includes a first slurry flow channel (33), a second slurry flow channel (34) and a glue flow channel, wherein the first slurry flow channel (33), the second slurry flow channel (34) and the glue flow channel all extend along a first direction, and at one end of the first direction, the first slurry flow channel (33) has a first discharge port (242), the second slurry flow channel (34) has a second discharge port (252), and the glue flow channel has a glue discharge port (244); in the second direction, the first discharge port (242) and the second discharge port (252) are spaced apart; in the third direction, at least two glue discharge ports (244) are provided, and the two glue discharge ports (244) are arranged on both sides of the first discharge port (242), wherein the first direction, the second direction and the third direction are perpendicular to each other.

2. The coating die head (20) according to claim 1, characterized in that The glue flow channel comprises a first glue flow channel (31) and a second glue flow channel (32) arranged on both sides of the third direction of the first slurry flow channel (33), the first glue flow channel (31) having a first glue outlet, the second glue flow channel (32) having a second glue outlet, and the first glue outlet and the second glue outlet are respectively arranged on both sides of the first discharge port (242) in the third direction.

3. The coating die head (20) according to claim 2, characterized in that: The first glue liquid flow channel (31) and the second glue liquid flow channel (32) both include a first flow channel (321) and a second flow channel (322), wherein the first flow channel (321) is parallel to the first slurry flow channel (33), one end of the second flow channel (322) is connected to the first flow channel (321), and the other end is inclined toward the first discharge port (242), and in the third direction, the first glue discharge port and the second glue discharge port are both spaced apart from the first discharge port (242).

4. The coating die head (20) according to claim 1, characterized in that In a projection plane perpendicular to the second direction, projections of the glue outlets (244) and the first outlet (242) arranged in pairs on both sides of the first outlet (242) are both located within the projection of the second outlet (252).

5. The coating die head (20) according to claim 1, characterized in that: There are multiple first discharge ports (242), and in a projection plane perpendicular to the second direction, at least part of the projection of two adjacent first discharge ports (242) and the projection of the glue discharge port (244) between the two first discharge ports (242) are both located within the projection of the second discharge port (252).

6. The coating die head (20) according to claim 1, characterized in that The first feed port (331) of the first slurry flow channel (33), the second feed port (341) of the second slurry, and the glue inlet (323) of the glue flow channel are all located on the other side of the coating die head (20) in the first direction.

7. The coating die head (20) according to claim 1, characterized in that The coating die head (20) comprises: a first module (21), a second module (22), a third module (23), a first gasket (24) and a second gasket (25), wherein the second module (22) is located between the first module (21) and the third module (23); the first gasket (24) is sandwiched between the first module (21) and the second module (22), and the second gasket (25) is sandwiched between the second module (22) and the third module (23).

8. The coating die head (20) according to claim 7, characterized in that The first slurry flow channel (33) comprises a first slurry channel (211) arranged in the first module (21), a first slurry tank (241) arranged on the first gasket (24), and the first discharge port (242); the first slurry channel (211), the first slurry tank (241), and the first discharge port (242) are connected in sequence.

9. The coating die head (20) according to claim 7, characterized in that: The second slurry flow channel (34) includes a second slurry channel (231) arranged in the third module (23), a second slurry tank (251) arranged on the second gasket (25), and the second discharge port (252), and the second slurry channel (231), the second slurry tank (251) and the second discharge port (252) are connected in sequence.

10. The coating die head (20) according to claim 7, characterized in that: The glue flow channel includes a glue channel arranged in the second module (22), a glue tank (243) arranged on the first gasket (24), and the glue outlet (244), and the glue channel (221), the glue tank (243), and the glue outlet (244) are connected in sequence; or, the glue flow channel includes a first glue channel arranged in the second module (22), a second glue channel arranged in the third module (23), the glue tank (243) arranged on the first gasket (24), and the glue outlet (244), and the second glue channel, the first glue channel, the glue tank (243), and the glue outlet (244) are connected in sequence.

11. The coating die (20) according to claim 7, characterized in that: The second direction is an up-down direction, and the first module (21), the second module (22) and the third module (23) are arranged in sequence from bottom to top, or the first module (21), the second module (22) and the third module (23) are arranged in sequence from top to bottom.

12. A coating machine (100), characterized in that: include: A back roller (11), the back roller (11) being used to carry a current collector of a battery; The coating die (20) according to any one of claims 1 to 11; a first feeding module (12), the first feeding module (12) being used to provide spraying slurry toward the first slurry flow channel (33); a second feeding module (13), the second feeding module (13) being used for providing spraying slurry toward the second slurry flow channel (34); A third feeding module (14), the third feeding module (14) is used to provide glue toward the glue flow channel.

13. The coating machine (100) according to claim 12, characterized in that The first feeding module (12), the second feeding module (13) and the third feeding module (14) all include a screw pump (15).

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