Coating die and coating device

Abstract

This application discloses a coating die and coating device. The coating die comprises a die body and an electrolysis module. The die body is provided with a slurry channel. The electrolysis module comprises a positive electrode and a negative electrode, each of which is at least partially disposed within the slurry channel and configured to electrolyze metal particles contained within the slurry within the slurry channel. The technical solution of this application enables the coating die to eliminate metal particles contained within the battery slurry, thereby improving the quality of subsequently manufactured batteries.

Description

Technical Field

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

[0002] Coating is an essential process in battery production and a key step that directly impacts battery safety, capacity, lifespan, and other performance characteristics. However, during the production and transportation of battery slurry, metallic impurities inevitably become incorporated into the slurry. These metal particles can then easily pierce the separator, causing a short circuit and compromising battery quality. Summary of the Invention

[0003] The main purpose of this application is to provide a coating die head, which is designed to eliminate metal particles contained in battery slurry to improve the quality of subsequently manufactured batteries.

[0004] To achieve the above objectives, the coating die head proposed in this application includes:

[0005] A die body, wherein the die body is provided with a slurry channel; and

[0006] The electrolysis module includes a positive electrode and a negative electrode. The positive electrode and the negative electrode are at least partially disposed in the slurry channel to be configured to electrolyze metal particles in the slurry in the slurry channel.

[0007] The coating die in the technology of this application integrates an electrolysis module on the die body, and the positive and negative electrodes in the electrolysis module are at least partially disposed within the slurry channel. This allows the positive and negative electrodes to electrolyze and eliminate metal particles contained in the slurry as the slurry passes through the slurry channel of the die body, thereby improving the quality of the subsequently manufactured battery. In addition, integrating the electrolysis module on the die body also allows the coating die to integrate both coating and electrolysis functions, improving the compactness of the structural distribution and reducing space occupation.

[0008] In some embodiments, the slurry channel includes a feed channel, a buffer chamber, and a discharge channel arranged and connected along a first direction, with the positive electrode and the negative electrode at least partially disposed within the buffer chamber. This provides ample space for installing and arranging the electrolysis module, thereby facilitating the installation and arrangement of the electrolysis module on the die body. Furthermore, the contact area and contact time between the slurry and the electrolysis module can be increased, thereby enhancing the electrolysis module's effectiveness in eliminating metallic particle impurities contained within the slurry.

[0009] In some embodiments, the positive electrode and the negative electrode are spaced side by side in the buffer chamber, thereby increasing the corresponding area between the positive electrode and the negative electrode, thereby facilitating improved electrolysis efficiency of metal particle impurities in the slurry between the positive electrode and the negative electrode.

[0010] In some embodiments, within the same electrolysis module, the minimum distance between the positive electrode and the negative electrode is defined as d1, satisfying the relationship: 5 mm ≤ d1 ≤ 20 mm. This allows for a better balance between slurry fluidity, electrolysis efficiency, and electrolysis effect.

[0011] In some embodiments, the buffer cavity extends along a second direction that intersects the first direction, and the positive electrode and the negative electrode extend along the second direction. This allows for better utilization of the space in the buffer cavity in the second direction, enabling the positive electrode and the negative electrode to contact the slurry at various locations in the second direction, thereby increasing the contact area between the positive electrode and the negative electrode and the slurry and improving electrolysis efficiency.

[0012] In some embodiments, the buffer chamber includes a first cavity wall and a second cavity wall spaced relative to each other in a second direction, and a connecting cavity wall connecting the first cavity wall and the second cavity wall; the electrolysis module further includes an insulating seat disposed on the first cavity wall; the positive electrode and the negative electrode are disposed on the insulating seat and spaced from the second cavity wall and the connecting cavity wall. This facilitates the insertion and installation of the positive electrode and the negative electrode on the insulating seat, thereby facilitating the installation and connection of the positive electrode and the negative electrode to the insulating seat. Furthermore, the insulating seat and the spacing between the positive electrode and the negative electrode and the second cavity wall and the connecting cavity wall can also provide insulation, reducing the possibility of current from the positive electrode and the negative electrode being transferred to the die body.

[0013] In some embodiments, the distance between the positive electrode and the negative electrode and the second cavity wall is smaller than the distance between the positive electrode and the negative electrode and the connecting cavity wall. This allows the positive electrode and the negative electrode to fully utilize the space in the extension direction of the buffer cavity, thereby forming a sufficient space for the slurry to pass between the positive electrode and the negative electrode and the connecting cavity wall, thereby improving the slurry passing efficiency and the coating efficiency of the coating die head on the substrate.

[0014] In some embodiments, the first cavity wall is provided with a mounting hole, the mounting hole communicating with the buffer cavity and the outside of the die body, and the insulating seat is mounted within the mounting hole. The coating die also includes a first sealing member, which is disposed within the mounting hole to seal between the insulating seat and the coating die. This prevents the insulating seat from occupying space within the buffer cavity, thereby leaving more room within the buffer cavity for accommodating the slurry, the positive electrode, and the negative electrode, thereby improving the slurry's passage efficiency and increasing the volume of the positive and negative electrodes, thereby enhancing electrolysis efficiency and effectiveness. The provision of the first sealing member can seal between the insulating seat and the coating die, reducing the possibility of slurry overflowing from the mounting hole.

[0015] In some embodiments, the electrolysis module further includes a first connecting wire and a second connecting wire. One end of the first connecting wire is disposed on an insulating base and electrically connected to the positive electrode, and the other end is configured to be connected to a power source. One end of the second connecting wire is disposed on an insulating base and electrically connected to the negative electrode, and the other end is configured to be connected to the power source. Thus, the flexibility of the first and second connecting wires facilitates bending and placement, thereby reducing requirements for the location of the power source and improving the convenience of powering the electrolysis module.

[0016] In some embodiments, an electrolysis module is provided within the buffer chamber, where the sum of the volumes of the positive electrode and negative electrode within the buffer chamber is defined as V1, and the volume of the buffer chamber is defined as V2, satisfying the relationship: 0.2≤V1 / V2≤0.6. This ensures that the volume of the positive and negative electrodes within the buffer chamber is not too small, thereby affecting the electrolysis efficiency and effectiveness of metal particle impurities contained within the slurry. Furthermore, the volume of the positive and negative electrodes within the buffer chamber is not too large, thereby preventing the slurry from being passed through inefficiently and affecting the coating efficiency of the coating die head on the substrate.

[0017] In some embodiments, the positive electrode and / or the negative electrode are linear structures, which can make the structures of the positive electrode and / or the negative electrode simpler, thereby facilitating their processing and manufacturing convenience.

[0018] In some embodiments, the positive electrode and / or negative electrode includes two end surfaces and a side surface, with the two end surfaces facing each other and the side surface connecting the two end surfaces. The side surface is provided with a flow-turbulating structure. This can increase the turbulence intensity of the slurry, improve the fluidity and mixing of the slurry, and enable more uniform electrolysis in the electrode module, thereby improving the removal of metal particle impurities contained in the slurry.

[0019] In some embodiments, the flow-disrupting structure includes at least one of a plurality of protrusions, a plurality of grooves, and spiral corrugations. Thus, configuring the flow-disrupting structure to include a plurality of protrusions and / or a plurality of grooves can simplify the structure of the flow-disrupting structure, thereby facilitating the manufacturing of the positive electrode and / or the negative electrode. Configuring the flow-disrupting structure to include spiral corrugations can enhance the flow-disrupting effect on the slurry.

[0020] In some embodiments, the positive electrode and / or the negative electrode are in a spiral structure, thereby enabling the positive electrode and / or the negative electrode to have a flow-disturbing effect.

[0021] In some embodiments, the coating die further comprises a heating module disposed within the die body and configured to heat the slurry within the buffer chamber. This heating of the slurry within the buffer chamber can thereby increase the electrolysis efficiency of the electrolysis module in removing metallic particle impurities contained within the slurry, thereby enhancing the removal of metallic particle impurities.

[0022] In some embodiments, the heating module and the electrolysis module are arranged relative to each other in a third direction, which intersects the first direction and the extension direction of the buffer chamber. This facilitates the corresponding and compact arrangement of the heating module and the electrolysis module, achieves targeted heating and temperature increase of the slurry around the electrolysis module, and enhances the effect of heating and temperature increase on electrolysis in the electrolysis module.

[0023] In some embodiments, the positive electrode and the negative electrode within the buffer chamber are spaced side by side along a first direction, and the area between the positive electrode and the negative electrode is located inward of the projection of the heating module on a projection plane perpendicular to a third direction. This can further improve the targeted heating effect of the heating module on the slurry surrounding the electrolysis module.

[0024] In some embodiments, within the same electrolysis module, the minimum distance between the positive electrode and the negative electrode is defined as d1, and the projected size of the buffer chamber in the first direction is d2, satisfying the relationship: 0.05≤d1 / d2≤0.5; and / or, the projected size of the heating module in the first direction is defined as d3, satisfying the relationship: 0.6≤d3 / d2≤1. Thus, setting the ratio between d1 and d2 to 0.05 to 0.5 allows the value of the minimum distance d1 between the positive electrode and the negative electrode to be moderate, thereby better balancing the fluidity, electrolysis efficiency, and electrolysis effect of the slurry; and setting the ratio between d3 and d2 to 0.6 to 1 allows the heating module to have a larger heating area for the slurry in the buffer chamber, thereby facilitating improved heating and temperature-raising effects on the slurry in the buffer chamber 10a2.

[0025] In some embodiments, the heating module is arranged to extend along the extension direction of the buffer cavity, and the projected size of the heating module in the extension direction of the buffer cavity is greater than or equal to the projected size of the buffer cavity. This can increase the heating coverage of the buffer cavity and further enhance the heating effect of the slurry in the buffer cavity.

[0026] In some embodiments, the die body includes a first die, a second die, and a gasket, the first die and the second die being arranged relative to each other in a third direction, with the gasket disposed between the first and second die heads; a feed channel and a buffer cavity are disposed in the first die, the buffer cavity having a first cavity opening disposed toward the second die head; the first die, the second die, and the gasket are enclosed to form a discharge channel, and the heating module is disposed in the second die head. Thus, the slurry channels are distributed and formed on different components, thereby facilitating the formation of the slurry channels; and the heating module is disposed on the second die head, so that it is convenient to correspond to the buffer cavity having the first cavity opening, thereby more efficiently transferring heat to the buffer cavity.

[0027] In some embodiments, the gasket is provided with a notch, which passes through one side of the gasket in the first direction, and the first die head, the second die head, and part of the notch are enclosed to form a discharge channel; the other part of the notch is located between the first cavity and the heating module, and the heating module is an infrared heater. Thus, the slurry in the buffer cavity can be directly heated based on the generated infrared radiation, reducing heat loss and achieving high efficiency and energy saving of the heating module; at the same time, the infrared radiation can also be quickly absorbed by the slurry and converted into thermal energy, which is beneficial to improving the heating efficiency of the heating module; moreover, based on the infrared radiation, the heating module does not need to contact the slurry, and thus does not occupy the limited space in the buffer cavity; further, the notch on the gasket is arranged to correspond to the space between the first cavity and the heating module, so that the infrared radiation radiated by the heating module can be avoided so that the infrared radiation can be effectively transmitted to the slurry in the buffer cavity.

[0028] In some embodiments, the second die head is provided with a receiving cavity having a second cavity opening facing the first cavity opening, and the heating module is disposed within the receiving cavity. This allows for a compact arrangement of the first and second die heads while improving the convenience of installing the heating module and meeting the required heating area of the heating module.

[0029] In some embodiments, the coating die head further includes a light-transmitting plate that covers the second cavity opening. Thus, the light-transmitting plate allows infrared radiation generated by the heating module to pass through, while also covering the second cavity opening, thereby reducing the possibility of slurry entering the receiving cavity.

[0030] In some embodiments, the coating die head further includes a second sealing member disposed within the second cavity to seal between the light-transmitting plate and the second die head. Thus, the second sealing member can seal the light-transmitting plate and the second die head, further reducing the possibility of slurry entering the receiving cavity.

[0031] In some embodiments, there are at least two buffer chambers, with at least two buffer chambers arranged along a first direction; there are at least two electrolysis modules, with at least a portion of the positive electrode and negative electrode in each electrolysis module disposed within a buffer chamber; and there are at least two heating modules, with each heating module corresponding to an electrolysis module. Thus, providing at least two buffer chambers can improve the buffering effect on the slurry; each buffer chamber is provided with an electrolysis module, enabling electrolysis of metal particle impurities contained in the slurry in each buffer chamber, thereby improving the elimination effect of the metal particle impurities; and the provision of at least two heating modules allows for targeted heating and temperature increase of the slurry surrounding each electrolysis module.

[0032] In some embodiments, the heating temperature of the heating module is greater than or equal to 30° C. and less than or equal to 40° C. This prevents the heating temperature from being too low, thereby affecting the heating effect on the slurry. At the same time, the heating temperature is also prevented from being too high, thereby increasing the viscosity of the slurry and affecting its fluidity.

[0033] In some embodiments, the positive electrode and the negative electrode are made of titanium, stainless steel, iridium-tantalum-titanium, or ruthenium-iridium-titanium; and / or the coating die further comprises a power supply electrically connected to the electrolysis module, wherein the output voltage of the power supply is greater than or equal to 4V and less than or equal to 100V. Thus, the use of positive and negative electrodes made of the above materials can better meet the guidance performance and strength requirements, and the provision of the power supply allows the electrolysis module to directly use its own power supply during use, eliminating the need for an external power supply, thereby facilitating the use of the coating die.

[0034] The present application also provides a coating device, comprising the above-mentioned coating die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] Figure 1 This is a schematic structural diagram of an embodiment of a coating device of the present application;

[0037] Figure 2 This is a schematic structural diagram of an embodiment of the coating die head of this application.

[0038] Figure 3 for Figure 2 A schematic diagram of the explosion structure of the coating die head;

[0039] Figure 4 for Figure 3 Schematic diagram of the first die head and electrolysis module in the assembled state;

[0040] Figure 5 for Figure 4 A partial enlarged schematic diagram of point A in the middle;

[0041] Figure 6 for Figure 4 Schematic diagram of the first die head and the electrolysis module in another perspective of the assembly state;

[0042] Figure 7 This is a schematic structural diagram of an embodiment of a positive electrode and a negative electrode in a coating die head of the present application;

[0043] Figure 8 This is a schematic structural diagram of another embodiment of the positive electrode and negative electrode in the coating die head of the present application;

[0044] Figure 9 This is a schematic structural diagram of another embodiment of the positive electrode and negative electrode in the coating die head of the present application.

[0045] Description of Figure Numbers:

[0046] 1000, coating device; 100, coating die; 10, die body; 10a, slurry channel; 10a1, feed channel; 10a2, buffer chamber; 10a21, first cavity opening; 10a3, discharge channel; 11, first die; 111, first cavity wall; 111a, mounting hole; 113, second cavity wall; 115, connecting cavity wall; 13, second die; 13a, accommodating cavity; 13a1, first cavity wall; Second cavity opening; 15, gasket; 15a, notch; 20, electrolysis module; 21, positive electrode; 211, end face; 213, side circumference; 2131, spoiler structure; 2133, protrusion; 23, negative electrode; 25, insulating seat; 27, first connecting line; 29, second connecting line; 30, first sealing member; 40, heating module; 50, light-transmitting plate; 60, second sealing member; 70, power supply; 300, back roller.

[0047] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution in which both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0052] Batteries, which are devices used to store electrical energy, are not only widely used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields.

[0053] Among them, the battery cell is the smallest unit that makes up the battery, and usually includes a battery shell and an electrode assembly arranged in the battery shell. The electrode assembly is the component in the battery cell where the electrochemical reaction actually occurs, and can include a positive electrode sheet, a negative electrode sheet, and a separator located between the two. It is formed by winding or stacking the positive electrode sheet, the negative electrode sheet, and the separator. Furthermore, the battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector uncoated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector uncoated with the negative electrode active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon, silicon, or other materials. To ensure that high currents can be passed without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0054] During the production of battery cells, the process of coating the positive active material onto the positive current collector and the negative active material onto the negative current collector is called the coating process. Specifically, the prepared viscous paste (i.e., the positive active material or negative active material described above) is uniformly, continuously or intermittently coated on the substrate (i.e., the positive current collector or negative current collector described above) through a coating device.

[0055] However, during the production and transportation of battery slurry, some metal impurities are inevitably present and mixed into the battery slurry. These metal particles can easily pierce the separator in the battery, causing a short circuit and thus affecting the battery quality.

[0056] Therefore, based on the above considerations, and in order to address the issue of metal particle impurities in the slurry affecting the quality of subsequent batteries, this application proposes a new coating die head. This coating die head innovatively integrates an electrolysis module into the die head body. By positioning at least a portion of the positive and negative electrodes in the electrolysis module within the slurry channel, the metal particle impurities in the slurry are electrolytically eliminated.

[0057] Next, the structure of the coating die head proposed in this application is explained with examples:

[0058] Please refer to Figure 1 and Figure 2 In one embodiment of the present application, the coating die 100 proposed in the present application includes a die body 10 and an electrolysis module 20, the die body 10 is provided with a slurry channel 10a; the electrolysis module 20 includes a positive electrode 21 and a negative electrode 23, the positive electrode 21 and the negative electrode 23 are at least partially provided in the slurry channel 10a, so as to be configured to electrolyze the metal particles in the slurry contained in the slurry channel 10a.

[0059] The die body 10 can serve as the main structure of the coating die 100 to form a slurry channel 10a for the slurry to pass through. That is, the slurry can enter from one end of the slurry channel 10a and then flow out from the other end to be coated on the substrate. The slurry channel 10a can be a feed channel 10a1, a buffer cavity 10a2, and a discharge channel 10a3 that are connected in sequence as described below. At this time, in order to facilitate the processing and forming of the feed channel 10a1, the buffer cavity 10a2, and the discharge channel 10a3, the die body 10 can be set as a split structure including several parts. For example: as described below, it includes a first die head 11, a second die head 13, and a gasket 15 located between the first die head 11 and the second die head 13, so that the feed channel 10a1 and the buffer cavity 10a2 with a relatively large cross-section can be set on the first die head 11, and the discharge channel 10a3 with a relatively narrow cross-section can be formed by the first die head 11, the second die head 13 and the gasket 15. Of course, the present application is not limited to this, and the cross-sections of the slurry channel 10a at various locations can also be kept equal. At this time, the die body 10 can be directly an integrated component. It can be seen that the present application does not limit the structural type of the die body 10 and the shape of the slurry channel 10a.

[0060] The electrolysis module 20 can be used to electrolyze metal particulate impurities contained in the slurry. Specifically, after energizing the positive electrode 21 and negative electrode 23 in the electrolysis module 20, when the potential in the conductive network formed by the positive electrode 21 and negative electrode 23 reaches the oxidation potential of the metal element, the metal element undergoes oxidation and loses electrons, becoming metal ions without the risk of physical self-discharge. This ultimately miniaturizes the metal impurities until they are removed, thereby completing the electrolysis of the metal particulate impurities contained in the slurry. The positive electrode 21 and negative electrode 23 can be only partially disposed within the slurry channel 10a, or they can be completely disposed within the slurry channel 10a. Furthermore, within the same electrolysis module 20, the positive electrode 21 and negative electrode 23 within the slurry channel 10a can be disposed side by side, or they can be disposed with only one end facing each other. Furthermore, the positive electrode 21 and negative electrode 23 within the slurry channel 10a can extend in the same direction as the slurry channel 10a, or they can intersect with the direction of extension of the slurry channel 10a. As can be seen, this application does not limit the arrangement of the positive electrode 21 and negative electrode 23 in the electrolysis module 20 within the slurry channel 10a. They can be located anywhere within the slurry channel 10a, as long as they can contact the slurry. Furthermore, the positive electrode 21 can have a linear structure, an arc-shaped structure, or a spiral structure. The cross-section of the positive electrode 21 perpendicular to its extension direction can have any shape, such as a circle, rectangle, or square. Similarly, the negative electrode 23 can have a linear structure, an arc-shaped structure, or a spiral structure. The cross-section of the negative electrode 23 perpendicular to its extension direction can have any shape, such as a circle, rectangle, or square. As can be seen, this application does not limit the shape and structure of the positive electrode 21 and the negative electrode 23. Furthermore, the shape and structure of the positive electrode 21 and the negative electrode 23 can be the same or different. In this case, the positive electrode 21 and the negative electrode 23 can be made of titanium, stainless steel, iridium-tantalum-titanium, or ruthenium-iridium-titanium, etc., to meet the required conductivity and strength requirements. Of course, the material of the positive electrode 21 and the negative electrode 23 can also be other metals or conductive materials, and this application is not limited to this. In addition, the number of electrolysis modules 20 can be one, or two or more. In addition, the coating die 100 can include a power supply 70 as described below to energize the positive electrode 21 and the negative electrode 23 in the electrolysis module 20. Of course, the coating die 100 can also be powered directly by an external power supply without having its own power supply 70.

[0061] The coating die 100 in the technology of the present application integrates an electrolysis module 20 on the die body 10, and the positive electrode 21 and the negative electrode 23 in the electrolysis module 20 are at least partially arranged in the slurry channel 10a, so that when the slurry passes through the slurry channel 10a of the die body 10, the metal particles contained in the slurry can be electrolyzed and eliminated by the positive electrode 21 and the negative electrode 23, thereby improving the quality of the battery manufactured subsequently. In addition, the integration of the electrolysis module 20 on the die body 10 also allows the coating die 100 to integrate both the coating function and the electrolysis function, thereby improving the compactness of the structural distribution and reducing the space occupied.

[0062] Please refer to Figures 1 to 3 In one embodiment of the present application, the slurry channel 10a includes a feed channel 10a1, a buffer cavity 10a2 and a discharge channel 10a3 arranged and connected along a first direction, and the positive electrode 21 and the negative electrode 23 are at least partially disposed in the buffer cavity 10a2.

[0063] When the coating die head 100 is in a normal installation state, with the ground as a reference, the first direction can be a horizontal direction. Of course, the first direction can also be a vertical direction, or an inclined direction intersecting the horizontal direction and the vertical direction. The specific type of the first direction is not limited in this application.

[0064] The feed channel 10a1 can be used to communicate with the feed pipe, and the feed pipe can be communicated with the slurry tank for storing the slurry, so that the slurry in the slurry tank can be transported to the feed channel 10a1 through the feed pipe to enter the die body 10. The feed channel 10a1 can be extended along the first direction. Moreover, the cross-section of the feed channel 10a1 in its extension direction can be circular, or rectangular or square, etc. The present application does not limit the shape of the feed channel 10a1. In addition, the number of feed channels 10a1 can be set to one, or at least two can be provided side by side to improve the slurry transportation efficiency. The present application does not limit the number of feed channels 10a1.

[0065] The buffer chamber 10a2 can be used to buffer the slurry flowing out of the feed channel 10a1 so that the slurry can have a more suitable flow rate to coat the substrate when it finally flows out of the discharge channel 10a3. At the same time, when there are at least two feed channels 10a1 arranged side by side, the slurry flowing out of each feed channel 10a1 can also be mixed by the buffer chamber 10a2 to make its flow rate uniform, thereby reducing the possibility of large differences in the flow rate of the subsequent discharge channel 10a3 at different positions, so as to uniformly coat the substrate. Among them, the buffer chamber 10a2 can be extended along a second direction intersecting the first direction as described below. Of course, the buffer chamber 10a2 can also be extended along the first direction. However, the cross-sectional area of the buffer chamber 10a2 in its extension direction needs to be larger than the channel cross-sectional area of the feed channel 10a1 and the discharge channel 10a3 so that it can play a buffering role on the slurry. Furthermore, the cross-section of the buffer cavity 10a2 perpendicular to its extension direction may be semicircular, completely circular, rectangular, or square, etc., and this application does not limit the shape of the buffer cavity 10a2. Furthermore, the number of buffer cavities 10a2 may be one, or at least two along the first direction, and this application does not limit the number of buffer cavities 10a2. The number of electrolytic modules 20 within the buffer cavity 10a2 may be one, or two or more electrolytic modules 20 within a single buffer cavity 10a2, and this application does not limit the number of electrolytic modules 20 within the buffer cavity 10a2.

[0066] The discharge channel 10a3 can be used to allow the slurry entering the die body 10 to flow out for coating on the substrate, thereby completing the coating process of the coating die 100 on the substrate. The discharge channel 10a3 can be extended along a first direction so that the slurry in the discharge channel 10a3 can follow the conveying direction of the feed channel 10a1, simplifying the slurry conveying path. Moreover, since it is generally necessary to coat a corresponding width of slurry on the substrate, the opening at the end of the discharge channel 10a3 away from the buffer chamber 10a2 can be configured as a long strip opening, and the extension length of the long strip opening can be the same as the width of the slurry to be coated on the substrate.

[0067] In this embodiment, since the cross-sectional area of the buffer chamber 10a2 is larger than that of the feed channel 10a1 and the discharge channel 10a3, when the electrodes and the negative electrode 23 in the electrolysis module 20 are at least partially arranged in the buffer chamber 10a2, on the one hand, there can be sufficient space to install and arrange the electrolysis module 20, thereby facilitating the installation and arrangement of the electrolysis module 20 on the die body 10. On the other hand, since the slurry needs to be buffered and accumulated in the buffer chamber 10a2, it can be made to have more slurry there and the flow rate of the slurry is relatively slow, thereby increasing the contact area and contact time between the slurry and the electrolysis module 20, so as to improve the electrolysis module 20's effect of electrolytically eliminating metal particle impurities contained in the slurry. Of course, the present application is not limited to this. In other embodiments, the positive electrode 21 and the negative electrode 23 in the electrolysis module 20 can also be arranged in the feed channel 10a1 or the discharge channel 10a3.

[0068] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the positive electrode 21 and the negative electrode 23 located in the buffer cavity 10a2 are arranged side by side with intervals.

[0069] The side-by-side arrangement includes the side-by-side arrangement of the positive electrode 21 and the negative electrode 23 in a first direction. In this case, the positive electrode 21 and the negative electrode 23 within the buffer chamber 10a2 may extend along a second direction intersecting the first direction, as described below, or may extend along a third direction. When the first direction is a horizontal direction, as described above, the second direction may be another horizontal direction, and the third direction may be a vertical direction. Of course, the side-by-side arrangement may also include the side-by-side arrangement of the positive electrode 21 and the negative electrode 23 in the second direction. In this case, the positive electrode 21 and the negative electrode 23 within the buffer chamber 10a2 may extend along the first direction or along the third direction. Alternatively, the side-by-side arrangement may also include the side-by-side arrangement of the positive electrode 21 and the negative electrode 23 in the third direction. In this case, the positive electrode 21 and the negative electrode 23 within the buffer chamber 10a2 may extend along the first direction or along the second direction.

[0070] In this embodiment, the positive electrode 21 and the negative electrode 23 in the buffer chamber 10a2 are arranged to be spaced side by side, which can increase the corresponding area between the two, thereby facilitating the improvement of the electrolysis efficiency of the metal particle impurities in the slurry between the positive electrode 21 and the negative electrode 23.

[0071] Please refer to Figure 2 In one embodiment of the present application, in the same electrolysis module 20, the minimum distance between the positive electrode 21 and the negative electrode 23 is defined as d1, satisfying the relationship: 5㎜≤d1≤20㎜.

[0072] The minimum distance d1, that is, when the cross-sections of the positive electrode 21 and the negative electrode 23 are linear structures such as circular, rectangular, or square, the distance between each point of the positive electrode 21 and the negative electrode 23 is equal. In this case, the distance between each point of the positive electrode 21 and the negative electrode 23 is the minimum distance d1. However, when the side surfaces 213 of the positive electrode 21 and the negative electrode 23 are provided with protrusions 2133 as described below, the distance between the protrusions 2133 on the positive electrode 21 and the protrusions 2133 on the negative electrode 23 is the minimum distance d1. Alternatively, when the positive electrode 21 and the negative electrode 23 are arc-shaped structures, the distance between the closest points of the positive electrode 21 and the negative electrode 23 is the minimum distance d1.

[0073] In this embodiment, the minimum distance d1 between the positive electrode 21 and the negative electrode 23 is set to 5 mm to 20 mm, so that the value of the minimum distance d1 will not be too small, which will affect the efficiency of the slurry passing between the positive electrode 21 and the negative electrode 23. At the same time, the value of the minimum distance d1 will not be too large, which will affect the magnitude of the electric field force formed between the positive electrode 21 and the negative electrode 23 and affect the electrolysis effect. Therefore, the range of the value of the minimum distance d1 is set in this way, which can better take into account the fluidity, electrolysis efficiency and electrolysis effect of the slurry. Among them, the value of the minimum distance d1 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm, and of course it can also be any value in the above range.

[0074] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the buffer cavity 10a2 is extended along the second direction, the second direction intersects with the first direction, and the positive electrode 21 and the negative electrode 23 are extended along the second direction.

[0075] In this embodiment, the buffer chamber 10a2 is configured to extend along a second direction intersecting the first direction, so that the extension direction of the buffer chamber 10a2 can intersect with the extension direction of the feed channel 10a1, thereby facilitating improved buffering of the slurry flowing out of the feed channel 10a1. At this time, the positive electrode 21 and the negative electrode 23 are arranged to extend along the second direction following the buffer chamber 10a2, so that the space in the buffer chamber 10a2 in the second direction can be better utilized, allowing the positive electrode 21 and the negative electrode 23 to contact the slurry at various locations in the second direction, thereby increasing the contact area between the positive electrode 21 and the negative electrode 23 and the slurry and improving electrolysis efficiency. At the same time, the positive electrode 21 and the negative electrode 23 located within the buffer chamber 10a2 can have a sufficiently large volume, so that their number can be set to one, thereby simplifying the number of positive electrodes 21 and negative electrodes 23 and improving the convenience of their installation and arrangement.

[0076] Please refer to Figure 3 、 Figure 4 、 Figure 6 as well as Figure 7 In one embodiment of the present application, the positive electrode 21 and / or the negative electrode 23 is a linear structure.

[0077] A linear structure, that is, one extending in a single direction, can be, for example, one extending in the second direction as described above. Furthermore, only the positive electrode 21 can extend in a single direction to form a linear structure, or only the negative electrode 23 can extend in a single direction to form a linear structure, or both the positive electrode 21 and the negative electrode 23 can extend in a single direction to form a linear structure.

[0078] In this embodiment, at least one of the positive electrode 21 and the negative electrode 23 is configured as a linear structure, which can make the structure of the positive electrode 21 and / or the negative electrode 23 simpler, thereby facilitating the processing and manufacturing thereof.

[0079] Please refer to Figure 8 In one embodiment of the present application, the positive electrode 21 and / or the negative electrode 23 includes two end surfaces 211 and a side surface 213 , the two end surfaces 211 are arranged back to back, the side surface 213 connects the two end surfaces 211 , and the side surface 213 is provided with a spoiler structure 2131 .

[0080] The end surface 211, that is, the two surfaces at both ends of the positive electrode 21 and / or the negative electrode 23 in the direction of extension thereof, for example: when the positive electrode 21 and / or the negative electrode 23 are extended along the second direction as described above, the two surfaces of the positive electrode 21 and / or the negative electrode 23 facing each other in the second direction are the end surfaces 211. The lateral surface 213 can be located between the two end surfaces 211 to connect the end surfaces 211. The flow-disturbing structure 2131 can be used to disturb the slurry. Among them, the flow-disturbing structure 2131 can be a structural form including a plurality of protrusions 2133 as described below, or a structural form including a plurality of grooves, or a structural form including a spiral blade. This application does not limit the structural form of the flow-disturbing structure 2131.

[0081] In this embodiment, a flow-disrupting structure 2131 is provided on the side circumference 213 of the positive electrode 21 and / or the negative electrode 23 to increase the turbulent flow intensity of the slurry, improve the fluidity and mixing effect of the slurry, so that the electrode module performs more uniform electrolysis and improves the removal of metal particle impurities contained in the slurry. Moreover, when the coating die head 100 is also integrated with the heating module 40 as described below, the provision of the flow-disrupting structure 2131 can also improve the heat transfer efficiency, thereby improving the heating effect of the heating module 40 on the slurry.

[0082] Please refer to Figure 8 In one embodiment of the present application, the spoiler structure 2131 may include a plurality of protrusions 2133 .

[0083] The protrusion 2133 can be a circular, rectangular or square column, or a plate. The present application does not limit the structural type and shape of the protrusion 2133. Moreover, multiple protrusions 2133 can be arranged in a group along the circumference of the positive electrode 21 and / or the negative electrode 23, and multiple groups can be further provided along the extension direction of the positive electrode 21 and / or the negative electrode 23. Of course, the multiple protrusions 2133 can also be arranged in a disordered manner on the side surface 213 of the positive electrode 21 and / or the negative electrode 23. The present application does not limit the arrangement of the multiple protrusions 2133 on the side surface 213 of the positive electrode 21 and / or the negative electrode 23.

[0084] In this embodiment, the spoiler structure 2131 includes a plurality of protrusions 2133 , which can make the structure of the spoiler structure 2131 simpler, thereby facilitating the manufacturing of the positive electrode 21 and / or the negative electrode 23 .

[0085] Similarly, in order to simplify the structural setting of the spoiler structure 2131, in one embodiment of the present application, the spoiler structure 2131 may also include a plurality of grooves. The groove may be any shape such as circular, rectangular or square. Moreover, the multiple grooves may be arranged at intervals along the circumference of the positive electrode 21 and / or the negative electrode 23 to form a group, and further multiple groups may be provided along the extension direction of the positive electrode 21 and / or the negative electrode 23. Of course, the multiple grooves may also be arranged in a disordered manner on the side circumference 213 of the positive electrode 21 and / or the negative electrode 23, and the present application does not limit the arrangement of the multiple grooves on the side circumference 213 of the positive electrode 21 and / or the negative electrode 23.

[0086] Alternatively, in order to improve the spoiler effect of the spoiler structure 2131, in one embodiment of the present application, the spoiler structure 2131 can be a spiral corrugation, that is, on the side surface 213 of the positive electrode 21 and / or the negative electrode 23, convex ribs extending along the spiral shape are arranged along the extension direction of the positive electrode 21 and / or the negative electrode 23.

[0087] In addition, it should be noted that the spoiler structure 2131 may be provided with at least two of the protrusions 2133, the grooves and the spiral corrugations at the same time to further enhance the spoiler effect.

[0088] Please refer to Figure 9 In one embodiment of the present application, the positive electrode 21 and / or the negative electrode 23 may also be directly set as a spiral structure so that it can have the disruptive effect of the disruptive structure 2131 as described above.

[0089] Please refer to Figures 2 to 6 In one embodiment of the present application, the cavity wall of the buffer cavity 10a2 includes a first cavity wall 111 and a second cavity wall 113 arranged relatively spaced apart in the second direction, and a connecting cavity wall 115 connecting the first cavity wall 111 and the second cavity wall 113; the electrolysis module 20 also includes an insulating seat 25, which is arranged on the first cavity wall 111; the positive electrode 21 and the negative electrode 23 are arranged on the insulating seat 25, and are spaced apart from the second cavity wall 113 and the connecting cavity wall 115.

[0090] The first cavity wall 111 and the second cavity wall 113, the two opposing inner wall surfaces can be planes, or of course, they can also be curved surfaces. This application does not limit the shape of the inner wall surfaces of the first cavity wall 111 and the second cavity wall 113. The connecting cavity wall 115 is located between the first cavity wall 111 and the second cavity wall 113, and is used to connect the first cavity wall 111 and the second cavity wall 113. When the cross-section of the buffer cavity 10a2 is semicircular, the inner wall surface of the connecting cavity wall 115 can be a curved surface. When the cross-section of the buffer cavity 10a2 is rectangular or square, the inner wall surface of the connecting cavity wall 115 can include several planes at an angle to form a U shape. The insulating seat 25 can be used to provide installation positions for the positive electrode 21 and the negative electrode 23. The insulating seat 25 can be an integrated structure, or a split structure including two parts to respectively install the positive electrode 21 and the negative electrode 23. Furthermore, the insulating seat 25 can be mounted on the inner surface of the first cavity wall 111, penetrate the first cavity wall 111 as described below, or be mounted directly on the outer surface of the first cavity wall 111. When the insulating seat 25 is mounted on the outer surface of the first cavity wall 111, the positive electrode 21 and the negative electrode 23 can be extended through the first cavity wall 111 to the outside of the die body 10, and an annular sleeve for insulation and sealing can be provided between the positive electrode 21 and the negative electrode 23 and the first cavity wall 111.

[0091] In this embodiment, one end of the positive electrode 21 and the negative electrode 23 in the extension direction is mounted on the insulating seat 25, which can facilitate the insertion and installation of the positive electrode 21 and the negative electrode 23 on the insulating seat 25, thereby facilitating the installation and connection of the positive electrode 21 and the negative electrode 23 to the insulating seat 25. Moreover, the insulating seat 25 and the spacing between the positive electrode 21 and the negative electrode 23 and the second cavity wall 113 and the connecting cavity wall 115 can also serve as an insulation function, thereby reducing the possibility of current from the positive electrode 21 and the negative electrode 23 being transmitted to the die body 10.

[0092] In one embodiment of the present application, the insulating seat 25 may be made of polytetrafluoroethylene, polysulfone or polyvinyl chloride, so that the insulating seat 25 can not only have an insulating effect but also be resistant to slurry corrosion, thereby increasing its service life.

[0093] In one embodiment of the present application, the distances between the positive electrode 21 and the negative electrode 23 and the second cavity wall 113 are smaller than the distances between the positive electrode 21 and the negative electrode 23 and the connecting cavity wall 115 .

[0094] In this embodiment, the distance between the positive electrode 21 and the negative electrode 23 and the second cavity wall 113 is set to be smaller than the distance between the positive electrode 21 and the negative electrode 23 and the connecting cavity wall 115, so that the positive electrode 21 and the negative electrode 23 can fully utilize the space in the extension direction of the buffer cavity 10a2, so as to form a space between the positive electrode 21 and the negative electrode 23 and the connecting cavity wall 115 to meet the requirements of the slurry passage, thereby improving the slurry passage efficiency and improving the coating efficiency of the coating die 100 on the substrate. The distance between the positive electrode 21 and the negative electrode 23 and the second cavity wall 113 can be set to be greater than or equal to 5mm and less than or equal to 10mm to meet the insulation gap. For example, the distance between the positive electrode 21 and the negative electrode 23 and the second cavity wall 113 can be 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, and of course, it can also be any value within the above range.

[0095] Please refer to Figure 4 and Figure 5 In one embodiment of the present application, the first cavity wall 111 is provided with a mounting hole 111a, the mounting hole 111a connects the buffer cavity 10a2 and the outside of the die body 10, and the insulating seat 25 is installed in the mounting hole 111a; the coating die 100 also includes a first seal 30, the first seal 30 is provided in the mounting hole 111a to seal between the insulating seat 25 and the coating die 100.

[0096] In this embodiment, the insulating seat 25 is installed in the mounting hole 111a of the first cavity wall 111 so that it does not occupy the space in the buffer cavity 10a2, so that the buffer cavity 10a2 has a larger space to accommodate the slurry and the positive electrode 21 and the negative electrode 23, thereby improving the slurry's passing efficiency and increasing the volume of the positive electrode 21 and the electrodes to improve the electrolysis efficiency and effect. Furthermore, the provision of the first sealing member 30 can seal between the insulating seat 25 and the coating die 100, reducing the possibility of slurry overflowing from the mounting hole 111a. The material of the first sealing member 30 can be fluororubber, perfluoroether rubber or polyetheretherketone, so that the first sealing member 30 can not only have a sealing effect, but also be resistant to slurry corrosion, thereby increasing the service life. In addition, when the insulating seat 25 is set as a split structure including two parts as described above, the number of mounting holes 111a can be set to two accordingly, and the first sealing member 30 can also be a split structure including two parts, so as to be set corresponding to the two parts of the insulating seat 25 respectively.

[0097] Please refer to Figure 4 and Figure 5In one embodiment of the present application, the electrolysis module 20 further includes a first connecting wire 27 and a second connecting wire 29, one end of the first connecting wire 27 is provided on the insulating seat 25 and is electrically connected to the positive electrode 21, and the other end is configured to be connected to the power supply 70; one end of the second connecting wire 29 is provided on the insulating seat 25 and is electrically connected to the negative electrode 23, and the other end is configured to be connected to the power supply 70.

[0098] In this embodiment, the electrolysis module 20 and the power supply 70 can be electrically connected through the first connecting line 27 and the second connecting line 29, and the first connecting line 27 and the second connecting line 29 are flexible and easy to bend and arrange, which helps to reduce the requirements for the location of the power supply 70 and improve the convenience of powering the electrolysis module 20.

[0099] In one embodiment of the present application, an electrolytic module 20 is provided in the buffer chamber 10a2. The sum of the volumes of the positive electrode 21 and the negative electrode 23 in the buffer chamber 10a2 is defined as V1, and the volume of the buffer chamber 10a2 is defined as V2, satisfying the relationship: 0.2≤V1 / V2≤0.6.

[0100] In this embodiment, when the positive electrode 21 and the negative electrode 23 are arranged along the extension direction of the buffer chamber 10a2, i.e., the second direction, as described above, the positive electrode 21 and the negative electrode 23 can effectively utilize the space in the extension direction of the buffer chamber 10a2 and have a sufficiently large volume. Therefore, an electrolysis module 20 can be installed within the buffer chamber 10a2, thereby improving the convenience of installing and arranging the electrolysis module 20. In this case, the ratio of the sum of the volumes V1 of the positive electrode 21 and the negative electrode 23 located within the buffer chamber 10a2 to the volume V2 of the buffer chamber 10a2 is further set to 0.2 to 0.6. This ensures that the volumes of the positive electrode 21 and the negative electrode 23 located within the buffer chamber 10a2 are not too small, thereby affecting the efficiency and effect of electrolysis of metal particulate impurities contained in the slurry. At the same time, the volume of the positive electrode 21 and the negative electrode 23 located in the buffer chamber 10a2 is not too large, which would result in low slurry flow efficiency and affect the coating efficiency of the coating die head 100 on the substrate. The ratio of V1 to V2 can be 0.2, 0.3, 0.4, 0.5 or 0.6, and can also be any value within the above range.

[0101] Please refer to Figure 2 In one embodiment of the present application, the coating die 100 further includes a heating module 40 . The heating module 40 is disposed in the die body 10 and is configured to heat the slurry in the buffer cavity 10 a 2 .

[0102] The heating module 40 can be used to heat the slurry in the buffer chamber 10a2. The heating module 40 can be an infrared heater as described below, or alternatively, an electric heating tube or heating film. This application does not limit the structural type of the heating module 40. Furthermore, the number of heating modules 40 can be one, two, or more.

[0103] In this embodiment, heating the slurry within the buffer chamber 10a2 by the heating module 40 can improve the electrolysis efficiency of the electrolysis module 20 in removing metallic impurities contained in the slurry, thereby enhancing the removal of metallic impurities. Furthermore, the heating effect of the heating module 40 can also facilitate maintaining the fluidity of the slurry.

[0104] Please refer to Figure 2 In one embodiment of the present application, the heating module 40 and the electrolysis module 20 are arranged relative to each other in a third direction, and the third direction intersects the first direction and the extension direction of the buffer chamber 10a2.

[0105] In this embodiment, since the feed channel 10a1, the buffer chamber 10a2, and the discharge channel 10a3 are arranged along the first direction, the heating module 40 and the electrolysis module 20 are arranged in the third direction. This facilitates the corresponding compact arrangement of the heating module 40 and the electrolysis module 20, achieves targeted heating and temperature increase of the slurry around the electrolysis module 20, and improves the effect of heating and temperature increase on the electrolysis of the electrolysis module 20. At the same time, the space of the die body 10 in the third direction can be better utilized, thereby improving the convenience of installing and arranging the heating module 40.

[0106] Please refer to Figure 2 In one embodiment of the present application, the positive electrode 21 and the negative electrode 23 located in the buffer cavity 10a2 are arranged side by side and spaced apart along the first direction. On the projection plane perpendicular to the third direction, the area between the positive electrode 21 and the negative electrode 23 is located on the inner side of the projection of the heating module 40.

[0107] In this embodiment, the positive electrode 21 and the negative electrode 23 are arranged side by side and spaced apart along the first direction, so that they can better correspond to the heating module 40 in the third direction. In other words, the area between the positive electrode 21 and the negative electrode 23 is located inside the projection of the heating module 40, further improving the targeted heating effect of the heating module 40 on the slurry surrounding the electrolysis module 20.

[0108] Please refer to Figure 2In one embodiment of the present application, in the same electrolysis module 20, the minimum distance between the positive electrode 21 and the negative electrode 23 is defined as d1, and the projection size of the buffer cavity 10a2 in the first direction is d2, satisfying the relationship: 0.05≤d1 / d2≤0.5.

[0109] In this embodiment, the ratio between d1 and d2 is set to 0.05 to 0.5, which can also make the value of the minimum distance d1 between the positive electrode 21 and the negative electrode 23 moderate, so as to better balance the fluidity of the slurry, the electrolysis efficiency, and the electrolysis effect as described above. The ratio between d1 and d2 can be 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45 or 0.5, and of course it can be any value within the above range.

[0110] Please refer to Figure 2 In one embodiment of the present application, the projection size of the heating module 40 in the first direction is defined as d3, satisfying the relationship: 0.6≤d3 / d2≤1.

[0111] In this embodiment, the ratio of d3 to d2 is set to 0.6 to 1, which allows the heating module 40 to have a larger heating area for the slurry in the buffer cavity 10a2, thereby facilitating an improved heating effect on the slurry in the buffer cavity 10a2. The ratio of d3 to d2 can be 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, or 1, and can also be any value within the above range.

[0112] In one embodiment of the present application, the heating module 40 is extended along the extension direction of the buffer cavity 10a2, and in the extension direction of the buffer cavity 10a2, the projection size of the heating module 40 is greater than or equal to the projection size of the buffer cavity 10a2.

[0113] In this embodiment, in the extension direction of the buffer cavity 10a2, that is, the second direction, the projection size of the heating module 40 is set to be greater than or equal to the projection size of the buffer cavity 10a2, which can increase the heating coverage range of the buffer cavity 10a2 and further improve the heating and temperature-raising effect of the slurry in the buffer cavity 10a2.

[0114] Please refer to Figure 2 and Figure 3In one embodiment of the present application, the die body 10 includes a first die 11, a second die 13 and a gasket 15. The first die 11 and the second die 13 are arranged opposite to each other in a third direction, and the gasket 15 is arranged between the first die 11 and the second die 13; the feed channel 10a1 and the buffer cavity 10a2 are arranged in the first die 11, and the buffer cavity 10a2 has a first cavity opening 10a21 arranged toward the second die 13. The first die 11, the second die 13 and the gasket 15 are enclosed and configured to form a discharge channel 10a3, and the heating module 40 is arranged in the second die 13.

[0115] In this embodiment, the die body 10 includes a first die 11, a second die 13, and a gasket 15. A feed channel 10a1 and a buffer cavity 10a2 having a first cavity 10a21 are provided on the first die 11. At the same time, the spacing of the gasket 15 facilitates the formation of a smaller discharge channel 10a3 in the third direction between the first die 11 and the second die 13. This allows the slurry channels 10a to be distributed on different components, thereby facilitating the formation of the slurry channels 10a. The heating module 40 is provided on the second die 13 to facilitate its correspondence with the buffer cavity 10a2 having the first cavity 10a21, thereby more efficiently transferring heat to the buffer cavity 10a2.

[0116] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the gasket 15 is provided with a notch 15a, which passes through one side of the gasket 15 in the first direction. The first die head 11, the second die head 13 and part of the notch 15a are enclosed to form a discharge channel 10a3; another part of the notch 15a is located between the first cavity 10a21 and the heating module 40, and the heating module 40 is an infrared heater.

[0117] In this embodiment, the heating module 40 is configured as an infrared heater, which can directly heat the slurry in the buffer cavity 10a2 based on the infrared radiation generated, thereby reducing heat loss and achieving high efficiency and energy saving of the heating module 40. At the same time, the infrared radiation can also be quickly absorbed by the slurry and converted into heat energy, which is conducive to improving the heating efficiency of the heating module 40. Moreover, based on infrared radiation, the heating module 40 does not need to come into contact with the slurry, thereby not occupying the limited space in the buffer cavity 10a2. Furthermore, the portion of the notch 15a on the gasket 15 corresponds to the portion between the first cavity opening 10a21 and the heating module 40, which can avoid the infrared radiation radiated by the heating module 40 so that the infrared radiation can be effectively transmitted to the slurry in the buffer cavity 10a2.

[0118] Please refer to Figure 2 and Figure 3In one embodiment of the present application, the second die head 13 is provided with a receiving cavity 13a, the receiving cavity 13a has a second cavity opening 13a1 arranged toward the first cavity opening 10a21, and the heating module 40 is disposed in the receiving cavity 13a.

[0119] In this embodiment, the accommodating cavity 13a provides space for accommodating the heating module 40, thereby improving the convenience of installing and arranging the heating module 40 while achieving a compact arrangement of the first die head 11 and the second die head 13, and meeting the required heating area of the heating module 40. A single heating module 40 can be installed in one accommodating cavity 13a, or two or more heating modules 40 can also be installed. The number of accommodating cavities 13a can be one, or two or more.

[0120] Please refer to Figure 2 In one embodiment of the present application, the coating die head 100 further includes a light-transmitting plate 50 , which covers the second cavity 13 a 1 .

[0121] In this embodiment, the light-transmitting plate 50 can transmit the infrared radiation generated by the heating module 40, and at the same time, it can cover the second cavity opening 13a1, thereby reducing the possibility of the slurry entering the accommodating cavity 13a. When the number of accommodating cavities 13a is set to two or more, at least two light-transmitting plates 50 can be provided to cover the second cavity opening 13a1 of each accommodating cavity 13a respectively. Of course, one light-transmitting plate 50 can also be provided to cover the second cavity opening 13a1 of each accommodating cavity 13a together. In addition, the material of the light-transmitting plate 50 can be glass to meet the light transmission and strength requirements. Of course, the material of the light-transmitting plate 50 can also be silicon carbide, which is not limited in this application.

[0122] Please refer to Figure 2 In one embodiment of the present application, the coating die head 100 further includes a second sealing member 60 . The second sealing member 60 is disposed in the second cavity 13 a 1 to seal between the light-transmitting plate 50 and the second die head 13 .

[0123] In this embodiment, the second seal 60 can seal the light-transmitting plate 50 and the second die head 13, further reducing the possibility of slurry entering the accommodating cavity 13a. The first seal 30 can be made of fluororubber, perfluoroether rubber, or polyetheretherketone, etc., so that the first seal 30 can not only provide a sealing effect but also be resistant to slurry corrosion, thereby increasing its service life. The number of first seals 30 can be set according to the number of light-transmitting plates 50, for example, each can be set to one.

[0124] Please refer to Figure 2In one embodiment of the present application, the number of buffer chambers 10a2 is at least two, and at least two buffer chambers 10a2 are arranged along the first direction; the number of electrolysis modules 20 is at least two, and at least part of the positive electrode 21 and the negative electrode 23 in each electrolysis module 20 is arranged in a buffer chamber 10a2; the number of heating modules 40 is at least two, and each heating module 40 is arranged corresponding to one electrolysis module 20.

[0125] In this embodiment, providing at least two buffer chambers 10a2 can improve the buffering effect on the slurry. In this case, an electrolysis module 20 can be provided in each buffer chamber 10a2 so that metal particle impurities contained in the slurry can be electrolyzed in each buffer chamber 10a2, thereby improving the elimination effect of metal particle impurities. Correspondingly, the number of heating modules 40 is also provided at least two, so that the slurry around each electrolysis module 20 can be heated and heated in a targeted manner. In order to simplify the structural arrangement of the second die head 13, a receiving chamber 13a can be provided to accommodate the at least two heating modules 40.

[0126] In one embodiment of the present application, the heating temperature of the heating module 40 is greater than or equal to 30° C. and less than or equal to 40° C.

[0127] In this embodiment, the heating temperature of the heating module 40 is set to 30°C to 40°C, so that the heating temperature will not be too low, which will affect the heating effect of the slurry. At the same time, the heating temperature will not be too high, which will increase the viscosity of the slurry and affect the fluidity. The heating temperature of the heating module 40 can be 30°C, 31°C, 32°C, 33°C, 34°C, 35°C, 36°C, 37°C, 38°C, 39°C or 40°C, and of course it can be any value in the above ranges.

[0128] In one embodiment of the present application, the coating die head 100 further includes a power supply 70 , which is electrically connected to the electrolysis module 20 . The output voltage of the power supply 70 is greater than or equal to 4V and less than or equal to 100V.

[0129] In the present embodiment, the coating die 100 is provided with a power supply 70, so that the electrolysis module 20 can directly use its own power supply 70 when in use, without the need for an additional external power supply, thereby helping to improve the convenience of using the coating die 100. Further, the output voltage of the power supply 70 is set to 4V to 100V, so that the output voltage of the power supply 70 will not be too small, resulting in an impact on the electrolysis effect of the metal particles. At the same time, it also makes the output voltage of the power supply 70 not too large, resulting in an impact on other costs in the slurry. Among them, the output voltage of the power supply 70 can be 4V, 10V, 20V, 30V, 40V, 50V, 60V, 70V, 80V, 90V or 100V, of course, it can also be any value in the above interval.

[0130] Please refer to Figures 1 to 9In one embodiment of the present application, a coating die 100 includes a die body 10 and an electrolysis module 20. The die body 10 is provided with a slurry channel 10a. The electrolysis module 20 includes a positive electrode 21 and a negative electrode 23. The positive electrode 21 and the negative electrode 23 are at least partially disposed within the slurry channel 10a, so as to be configured to electrolyze metal particles contained in the slurry within the slurry channel 10a. The slurry channel 10a includes a feed channel 10a1, a buffer chamber 10a2, and a discharge channel 10a3 arranged and connected along a first direction. The positive electrode 21 and the negative electrode 23 are at least partially disposed within the buffer chamber 10a2. The positive electrode 21 and the negative electrode 23 located within the buffer chamber 10a2 are arranged side by side and spaced apart. In the same electrolysis module 20, the minimum distance between the positive electrode 21 and the negative electrode 23 is defined as d1, satisfying the relationship: 5 mm ≤ d1 ≤ 20 mm. The buffer chamber 10a2 extends along a second direction that intersects the first direction. The positive electrode 21 and the negative electrode 23 extend along the second direction. The walls of the buffer chamber 10a2 include a first wall 111 and a second wall 113 spaced apart from each other in the second direction, and a connecting wall 115 connecting the first wall 111 and the second wall 113. The electrolysis module 20 also includes an insulating seat 25 disposed on the first wall 111. The positive electrode 21 and the negative electrode 23 are disposed on the insulating seat 25 and spaced apart from the second wall 113 and the connecting wall 115. The first wall 111 defines a mounting hole 111a that connects the buffer chamber 10a2 to the outside of the die body 10. The insulating seat 25 is mounted within the mounting hole 111a. The coating die 100 also includes a first seal 30 disposed within the mounting hole 111a to seal between the insulating seat 25 and the coating die 100. The electrolysis module 20 also includes a first connecting wire 27 and a second connecting wire 29. One end of the first connecting wire 27 is located on the insulating base 25 and electrically connected to the positive electrode 21, and the other end is configured to be connected to the power supply 70. One end of the second connecting wire 29 is located on the insulating base 25 and electrically connected to the negative electrode 23, and the other end is configured to be connected to the power supply 70. The positive electrode 21 and / or the negative electrode 23 are linear structures. The positive electrode 21 and / or the negative electrode 23 include two end surfaces 211 and a side surface 213. The two end surfaces 211 are arranged in back-to-back relationship. The side surface 213 connects the two end surfaces 211 and is provided with a flow-disrupting structure 2131. The flow-disrupting structure 2131 includes at least one of a plurality of protrusions 2133, a plurality of grooves, and spiral corrugations. The coating die 100 also includes a heating module 40. The heating module 40 is located on the die body 10 and is configured to heat the slurry within the buffer chamber 10a2. The heating module 40 and the electrolysis module 20 are arranged opposite to each other in a third direction, and the third direction intersects the first direction and the extension direction of the buffer chamber 10a2.The positive electrode 21 and the negative electrode 23 within the buffer cavity 10a2 are spaced apart and arranged side by side along a first direction. In a projection plane perpendicular to a third direction, the area between the positive electrode 21 and the negative electrode 23 is located inward of the projection of the heating module 40. The heating module 40 extends along the extension direction of the buffer cavity 10a2, and the projection dimension of the heating module 40 in the extension direction of the buffer cavity 10a2 is greater than or equal to the projection dimension of the buffer cavity 10a2. The die body 10 includes a first die 11, a second die 13, and a gasket 15. The first and second die 11, 13 are arranged opposite each other in the third direction, with the gasket 15 positioned between the first and second die 11, 13. A feed channel 10a1 and a buffer chamber 10a2 are provided in the first die 11. The buffer chamber 10a2 has a first cavity opening 10a21 facing the second die 13. The first, second, and gasket 15 together form a discharge channel 10a3. A heating module 40 is provided in the second die 13. The gasket 15 has a notch 15a extending through one side of the gasket 15 in the first direction. The first, second, and notch 15a together form the discharge channel 10a3. Another portion of the notch 15a is located between the first cavity opening 10a21 and the heating module 40. The heating module 40 is an infrared heater. The second die head 13 has a receiving chamber 13a with a second opening 13a1 facing the first opening 10a21. The heating module 40 is disposed within the receiving chamber 13a. The coating die head 100 also includes a light-transmitting plate 50, which covers the second opening 13a1. The coating die head 100 also includes a second sealing member 60, which is disposed within the second opening 13a1 to seal between the light-transmitting plate 50 and the second die head 13. There are at least two buffer chambers 10a2, arranged along the first direction. There are at least two electrolysis modules 20, with at least a portion of the positive electrode 21 and negative electrode 23 in each electrolysis module 20 disposed within a buffer chamber 10a2. There are at least two heating modules 40, each corresponding to one electrolysis module 20. The heating temperature of the heating modules 40 is greater than or equal to 30°C and less than or equal to 40°C. The positive electrode 21 and the negative electrode 23 are made of titanium, stainless steel, iridium tantalum titanium or ruthenium iridium titanium; the coating die head 100 also includes a power supply 70, which is electrically connected to the electrolysis module 20, and the output voltage of the power supply 70 is greater than or equal to 4V and less than or equal to 100V.

[0131] The present application also proposes a coating device 1000, which includes a coating die 100. The specific structure of the coating die 100 refers to the above embodiment. Since the coating device 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the coating device 1000 can also include a back roller 300, which can be arranged opposite to the discharge channel 10a3 in the coating die 100. The electrode can pass between the back roller 300 and the coating die 100, so that the side of the electrode facing away from the back roller 300 can be coated with the slurry flowing out of the discharge channel 10a3 of the coating die 100.

[0132] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application description and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A coating die head, characterized in that, include: A die body, wherein the die body is provided with a slurry channel; and an electrolysis module, the electrolysis module comprising a positive electrode and a negative electrode, the positive electrode and the negative electrode being at least partially disposed in the slurry channel and configured to electrolyze metal particles contained in the slurry in the slurry channel; The slurry channel includes a feed channel, a buffer cavity, and a discharge channel arranged and connected along a first direction, and the positive electrode and the negative electrode are at least partially disposed in the buffer cavity; The coating die further includes a heating module, which is disposed on the die body and configured to heat the slurry in the buffer cavity; The heating module and the electrolysis module are arranged opposite to each other in a third direction, and the third direction intersects with the first direction and the extension direction of the buffer cavity.

2. The coating die head according to claim 1, wherein The positive electrode and the negative electrode located in the buffer cavity are arranged side by side and spaced apart.

3. The coating die head according to claim 2, wherein In the same electrolysis module, the minimum distance between the positive electrode and the negative electrode is defined as d1, which satisfies the relationship: 5 mm ≤ d1 ≤ 20 mm.

4. The coating die head according to claim 2, wherein The buffer cavity is extended along a second direction, the second direction intersects with the first direction, and the positive electrode and the negative electrode are extended along the second direction.

5. The coating die head according to claim 4, wherein The cavity wall of the buffer cavity includes a first cavity wall and a second cavity wall spaced apart from each other in the second direction, and a connecting cavity wall connecting the first cavity wall and the second cavity wall; The electrolysis module further includes an insulating seat, which is provided on the first cavity wall; The positive electrode and the negative electrode are arranged on the insulating seat and spaced apart from the second cavity wall and the connecting cavity wall.

6. The coating die head according to claim 5, wherein The distances between the positive electrode, the negative electrode and the second cavity wall are smaller than the distances between the positive electrode, the negative electrode and the connecting cavity wall.

7. The coating die head according to claim 5, wherein The first cavity wall is provided with a mounting hole, the mounting hole communicating with the buffer cavity and the outer side of the die body, and the insulating seat is mounted in the mounting hole; The coating die head further includes a first sealing member, which is disposed in the mounting hole to seal between the insulating seat and the coating die head.

8. The coating die head according to claim 7, wherein The electrolysis module further includes a first connecting wire and a second connecting wire, wherein one end of the first connecting wire is disposed on the insulating seat and electrically connected to the positive electrode, and the other end is configured to be connected to a power supply; One end of the second connecting wire is disposed on the insulating seat and electrically connected to the negative electrode, and the other end is configured to be connected to a power source.

9. The coating die head according to claim 4, wherein The electrolysis module is provided in the buffer chamber. The sum of the volumes of the positive electrode and the negative electrode in the buffer chamber is defined as V1, and the volume of the buffer chamber is defined as V2, satisfying the relationship: 0.2≤V1 / V2≤0.

6.

10. The coating die according to any one of claims 1 to 9, wherein The positive electrode and / or the negative electrode is a linear structure.

11. The coating die head according to claim 10, wherein The positive electrode and / or the negative electrode comprises two end surfaces and a side circumferential surface, the two end surfaces are arranged back to back, the side circumferential surface connects the two end surfaces, and the side circumferential surface is provided with a spoiler structure.

12. The coating die head according to claim 11, wherein The spoiler structure includes at least one of a plurality of protrusions, a plurality of grooves, and spiral corrugations.

13. The coating die head according to any one of claims 1 to 9, wherein The positive electrode and / or the negative electrode is a spiral structure.

14. The coating die head according to claim 1, wherein The positive electrode and the negative electrode in the buffer cavity are arranged side by side and spaced apart along the first direction. On a projection plane perpendicular to the third direction, the area between the positive electrode and the negative electrode is located inside the projection of the heating module.

15. The coating die head according to claim 14, wherein In the same electrolysis module, the minimum distance between the positive electrode and the negative electrode is defined as d1, and the projection size of the buffer cavity in the first direction is d2, satisfying the relationship: 0.05≤d1 / d2≤0.

5.

16. The coating die head according to claim 14, wherein The projection size of the buffer cavity in the first direction is defined as d2, and the projection size of the heating module in the first direction is defined as d3, satisfying the relationship: 0.6≤d3 / d2≤1.

17. The coating die head according to claim 1, wherein The heating module is extended along the extension direction of the buffer cavity, and in the extension direction of the buffer cavity, the projected size of the heating module is greater than or equal to the projected size of the buffer cavity.

18. The coating die head according to claim 1, wherein The die body includes a first die, a second die, and a gasket, wherein the first die and the second die are arranged opposite to each other in the third direction, and the gasket is arranged between the first die and the second die; The feed channel and the buffer cavity are arranged on the first die head, the buffer cavity has a first cavity opening arranged toward the second die head, the first die head, the second die head and the gasket are enclosed to form the discharge channel, and the heating module is arranged on the second die head.

19. The coating die head according to claim 18, wherein The gasket is provided with a notch, the notch passes through one side of the gasket in the first direction, and the first die head, the second die head and a portion of the notch are enclosed to form the discharge channel; Another part of the notch is located between the first cavity and the heating module, and the heating module is an infrared heater.

20. The coating die according to claim 19, wherein The second die head is provided with an accommodating cavity having a second cavity opening arranged toward the first cavity opening, and the heating module is arranged in the accommodating cavity.

21. The coating die according to claim 20, wherein The coating die head further includes a light-transmitting plate, and the light-transmitting plate covers the second cavity opening.

22. The coating die of claim 21, wherein: The coating die head further includes a second sealing member, which is disposed in the second cavity to seal between the light-transmitting plate and the second die head.

23. The coating die head according to claim 1, wherein The number of the buffer cavities is at least two, and the at least two buffer cavities are arranged along the first direction; There are at least two electrolysis modules, and at least a portion of the positive electrode and the negative electrode in each electrolysis module is disposed in a buffer chamber; The number of the heating modules is at least two, and each heating module is provided corresponding to one electrolysis module.

24. The coating die according to claim 1, wherein The heating temperature of the heating module is greater than or equal to 30° C. and less than or equal to 40° C.

25. The coating die according to any one of claims 1 to 9, wherein The positive electrode and the negative electrode are made of titanium, stainless steel, iridium-tantalum-titanium or ruthenium-iridium-titanium; And / or, the coating die head further includes a power supply, the power supply is electrically connected to the electrolysis module, and the output voltage of the power supply is greater than or equal to 4V and less than or equal to 100V.

26. A coating device, characterized in that: Comprising a coating die as described in any one of claims 1 to 25.

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