Slurry coating die head and slurry coating equipment

Abstract

According to the slurry coating die head and the slurry coating equipment provided by the embodiment of the utility model, the pressure sensor unit is arranged at the main body part of the slit of the slurry coating die head, so that more accurate pressure distribution close to the opening part of the slit of the slurry coating die head can be fully detected; therefore, more accurate data is provided for the adjustment of the coating surface density adjusting mechanism, and the transverse consistency of the coating surface density is further ensured. Besides, the pressure sensor unit comprises a plurality of pressure sensors, each pressure sensor comprises a plurality of measuring elements, and the plurality of measuring elements can cooperatively detect the pressure generated by the slurry, so that the detection result is more accurate, and the adjustment of the coating surface density adjusting mechanism is more facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of coating in the battery cell manufacturing process, specifically relating to a slurry coating die head and slurry coating equipment. Background Technology

[0002] The coating process is a crucial step in the battery cell manufacturing process. The electrode sheets produced in this process have a significant impact on the battery cell's capacity, safety, electrical performance consistency, and long cycle life. The coating process is completed through a coating die.

[0003] In existing mature commercial slurry coating dies, the cavity pressure is a crucial process parameter in the coating process. Pressure detection within the slurry coating die typically relies on simple pressure sensors with a limited number of spatial points. This approach is insufficient for detecting pressure at various points within the complex internal cavity and at the slurry coating slits. Furthermore, the pressure detected by these simple, limited-point sensors cannot fully reflect the true pressure and pressure distribution within the cavity, thus reducing the adjustment accuracy of the coating density adjustment mechanism and consequently lowering the lateral consistency of the coating density. Utility Model Content

[0004] This utility model provides a slurry coating die head and slurry coating equipment. The pressure inside the cavity of the slurry coating die head and the pressure at the slurry coating slit are fully detected, which is beneficial to the adjustment of the coating surface density adjustment mechanism, thereby ensuring the lateral consistency of the coating surface density.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] This utility model provides a slurry coating die head, which includes a slurry conveying component and a pressure sensor unit;

[0007] The slurry conveying component is provided with a feed inlet, a main cavity, a connecting channel, a secondary cavity, and a slit. The feed inlet is connected to the main cavity, the main cavity and the secondary cavity are connected through the connecting channel, and the secondary cavity is connected to the slit.

[0008] The slit includes an opening and a main body, the opening being located at the end of the slit away from the secondary cavity, and the main body being located at the end of the slit closer to the secondary cavity;

[0009] The pressure sensor unit is located in the main body.

[0010] Optionally, the slurry coating die head further includes an adjustment mechanism, which includes a fixing component and an adjustment component. The fixing component is fixedly connected to the slurry conveying component, and the adjustment component is movable relative to the fixing component to adjust the cross-sectional size of the slit.

[0011] The pressure sensor unit includes a first pressure sensor assembly, and along the direction of relative movement between the adjusting assembly and the fixed assembly, the projection of the first pressure sensor assembly at least partially overlaps with the projection of the adjusting assembly.

[0012] Optionally, the pressure sensor unit further includes a second pressure sensor assembly located between the opening and the first pressure sensor assembly.

[0013] Optionally, the first pressure sensor assembly includes a plurality of first pressure sensors, and the number of adjustment mechanisms is also plurality of, wherein the number of first pressure sensors is equal to the number of adjustment mechanisms;

[0014] The plurality of adjustment mechanisms are evenly arranged along a first direction, and the positions of the plurality of first pressure sensors correspond one-to-one with the positions of the plurality of adjustment mechanisms. The first direction is perpendicular to the flow direction of the slurry and perpendicular to the movement direction of the adjustment assembly.

[0015] Optionally, the first pressure sensor includes at least two measuring elements, which are used to collaboratively detect the pressure generated by the slurry.

[0016] Optionally, the slurry coating die head further includes a displacement sensor and a flow-blocking block. The displacement sensor is fixedly connected to the fixing component or the adjusting component. The flow-blocking block is located at one end of the adjusting component near the slit and is fixedly connected to the adjusting component. The displacement sensor is used to measure the displacement of the flow-blocking block in the direction of movement of the adjusting component.

[0017] Optionally, the main cavity includes a first main cavity, the communicating channel includes a first communicating channel, the secondary cavity includes a first secondary cavity, and the slit includes a first slit;

[0018] The slurry conveying component includes a first die head and a second die head, which are connected to form the first slit.

[0019] The second mold head is provided with the first main cavity, the first connecting channel and the first secondary cavity, the first main cavity and the first secondary cavity are connected through the first connecting channel, and the first secondary cavity is connected to the first slit;

[0020] The first slit includes a first opening and a first main body. The first opening is located at the end of the first slit away from the first secondary cavity, and the first main body is located at the end of the first slit close to the first secondary cavity.

[0021] The pressure sensor unit is disposed at the first main body portion. Optionally, a first groove is provided on the first mold head or the second mold head, and the adjustment mechanism is located on the first mold head or the second mold head, with the first groove disposed opposite to the adjustment mechanism; the first groove is located at the first main body portion and is used to place the pressure sensor unit.

[0022] Optionally, the main cavity includes a second main cavity and a third main cavity, the connecting channel includes a second connecting channel and a third connecting channel, the secondary cavity includes a second secondary cavity and a third secondary cavity, and the slit includes a second slit and a third slit;

[0023] The slurry conveying component includes a third die head, a fourth die head, and a fifth die head. The third die head and the fourth die head are connected to form the second slit, and the fourth die head and the fifth die head are connected to form the third slit.

[0024] The fourth mold head is provided with a second main cavity, a second connecting channel and a second secondary cavity. The second main cavity and the second secondary cavity are connected through the second connecting channel, and the second secondary cavity is connected to the second slit.

[0025] The fifth mold head is provided with the third main cavity, the third connecting channel and the third secondary cavity, the third main cavity and the third secondary cavity are connected to each other through the third connecting channel, and the third secondary cavity is connected to the third slit;

[0026] The second slit includes a second opening and a second main body. The second opening is located at the end of the second slit away from the second secondary cavity, and the second main body is located at the end of the second slit close to the second secondary cavity.

[0027] The third slit includes a third opening and a third main body. The third opening is located at the end of the third slit away from the third secondary cavity, and the third main body is located at the end of the third slit close to the third secondary cavity.

[0028] There are two pressure sensor units, one of which is located at the second main body and the other at the third main body.

[0029] Optionally, a second groove is provided on the third mold head or the fourth mold head, a portion of the adjustment mechanism is located on the third mold head or the fourth mold head, the second groove is disposed opposite to a portion of the adjustment mechanism, and the second groove is located at the second main body portion;

[0030] A third groove is provided on the fourth mold head or the fifth mold head, and another part of the adjustment mechanism is located on the fourth mold head or the fifth mold head. The third groove is arranged opposite to the other part of the adjustment mechanism and is located at the third main body part.

[0031] The second and third grooves are used to house the pressure sensor unit.

[0032] Optionally, the slurry coating equipment includes a host computer, a slave computer, and any of the above-mentioned slurry coating die heads;

[0033] The slurry coating die head is electrically connected to the host computer, the host computer is electrically connected to the slave computer, and the slave computer is also electrically connected to the slurry coating die head;

[0034] The host computer triggers the slave computer to adjust and control the coating flow rate of the slurry coating die head based on the pressure signal transmitted by the slurry coating die head.

[0035] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0036] This embodiment of the slurry coating die head, by setting a pressure sensor unit at the main body of the slit of the slurry coating die head, can accurately detect the pressure distribution near the opening of the slit, thereby providing more precise data for the adjustment of the coating density adjustment mechanism and ensuring the lateral consistency of the coating density. Furthermore, the pressure sensor unit includes multiple pressure sensors, each comprising multiple measuring elements. These multiple measuring elements can collaboratively detect the pressure generated by the slurry, resulting in more accurate detection results, which is more beneficial for the adjustment of the coating density adjustment mechanism.

[0037] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is a schematic diagram of a slurry coating die provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of an adjustment mechanism provided in an embodiment of the present utility model;

[0041] Figure 3 This is a schematic diagram of a pressure sensor unit provided in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of another pressure sensor unit provided in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of another adjustment mechanism provided in an embodiment of the present utility model;

[0044] Figure 6 This is a schematic diagram of a single-layer slurry coating die head provided in an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of a first slit provided in an embodiment of the present utility model;

[0046] Figure 8 This is a schematic diagram of a double-layer slurry coating die head provided in an embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of a second slit and a third slit provided in an embodiment of the present invention;

[0048] Figure 10 This is a schematic diagram of a closed-loop control system for a pressure sensor coating die head provided in an embodiment of this utility model.

[0049] Figure label:

[0050] Slurry conveying component-10, feed inlet-11, main chamber-12, first main chamber-121, second main chamber-122, third main chamber-123, connecting channel-13, first connecting channel-131, second connecting channel-132, third connecting channel-133, secondary chamber-14, first secondary chamber-141, second secondary chamber-142, third secondary chamber-143, slit-15, opening-151, main body-152, first slit-16, first opening-161, second slit-17, second opening-171, second main body-172, third slit-18, third opening-181, third main body-182, pressure sensor unit-20 First pressure sensor assembly-21, first pressure sensor-211, measuring element-2111, second pressure sensor assembly-22, second pressure sensor-221, third pressure sensor assembly-23, third pressure sensor-231, adjusting mechanism-30, fixing assembly-301, adjusting assembly-302, displacement sensor-40, flow blocking block-50, first mold head-101, second mold head-102, first groove-1022, third mold head-103, second groove-1031, third groove-1032, fourth mold head-104, fifth mold head-105, slurry coating mold head-100, host computer-200, slave computer-300. Detailed Implementation

[0051] The term "plural" in the specification and claims of this utility model means two or more. The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features in the embodiments can be combined with each other.

[0054] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] Reference Figure 1 The present invention provides a slurry coating die head 100, which includes a slurry conveying component 10 and a pressure sensor unit 20.

[0056] The slurry conveying component 10 is provided with a feed inlet 11, a main cavity 12, a connecting channel 13, a secondary cavity 14 and a slit 15. The feed inlet 11 is connected to the main cavity 12, the main cavity 12 is connected to the secondary cavity 14, the secondary cavity 14 is connected to the slit 15 through the connecting channel 13, and the secondary cavity 14 is connected to the slit 15.

[0057] The slit 15 includes an opening 151 and a main body 152. The opening 151 is located at the end of the slit 15 away from the secondary cavity 14, and the main body 152 is located at the end of the slit 15 close to the secondary cavity 14.

[0058] The pressure sensor unit 20 is located at the main body 152.

[0059] The slurry coating die 100 is a device used to uniformly coat slurry onto a substrate. It is the core component of the slurry coating equipment, primarily responsible for uniformly coating liquid materials such as paints, inks, and adhesives onto the target surface. In lithium battery production, the slurry coating die 100 is used to uniformly coat positive and negative electrode slurries onto aluminum or copper foil, significantly impacting battery performance. The working principle of the slurry coating die 100 is as follows: a metering pump supplies Newtonian or non-Newtonian fluid slurry to the slit die. The slurry forms a stable pressure inside the die and is then extruded from the slit, forming droplets between itself and the moving substrate, and transferring to the substrate surface to form a wet film. The die design must consider the rheological parameters of the slurry to ensure a uniform and stable flow state within the die.

[0060] In the slurry coating die head 100 of this utility model embodiment, such as Figure 1As shown, the slurry coating die head 100 includes a slurry conveying component 10 and a pressure sensor unit 20. The slurry conveying component 10 is provided with an inlet 11, a main cavity 12, a connecting channel 13, a secondary cavity 14, and a slit 15. The inlet 11 communicates with the main cavity 12, the main cavity 12 and the secondary cavity 14 are connected through the connecting channel 13, and the secondary cavity 14 communicates with the slit 15. Slurry flows in from the inlet 11, passes through the main cavity 12, the connecting channel 13, and the secondary cavity 14, and flows out from the opening 151 of the slit 15. The slit 15 includes an opening 151 and a main body 152. The opening 151 is located at the end of the slit 15 away from the secondary cavity 14, and the main body 152 is located at the end of the slit 15 closer to the secondary cavity 14. The pressure sensor unit 20 is disposed at the main body 152. By setting a pressure sensor unit 20 at the main body 152 of the slit 15 in the slurry coating die head 100, the pressure distribution near the opening 151 of the slit 15 in the slurry coating die head 100 can be accurately detected, thereby providing more precise data for the adjustment of the coating surface density adjustment mechanism and ensuring the lateral consistency of the coating surface density.

[0061] In the slurry coating die head 100 of this utility model embodiment, the cross-sectional size of the connecting channel 13 can be the same as or different from the cross-sectional size of the slit 15. The cross-sectional size of the connecting channel 13 is not limited here, as long as the main cavity 12 and the secondary cavity 14 can be connected through the connecting channel 13 to ensure the smooth flow of the slurry.

[0062] Optionally, refer to Figure 1 , Figure 2 and Figure 3 The slurry coating die head 100 also includes an adjustment mechanism 30, which includes a fixing component 301 and an adjustment component 302. The fixing component 301 is fixedly connected to the slurry conveying component 10, and the adjustment component 302 is movable relative to the fixing component 301 to adjust the cross-sectional size of the slit 15.

[0063] The pressure sensor unit 20 includes a first pressure sensor assembly 21. Along the direction of relative movement between the adjustment assembly 302 and the fixed assembly 301, the projection of the first pressure sensor assembly 21 at least partially overlaps with the projection of the adjustment assembly 302.

[0064] The regulating mechanism is a key component used to control the slurry flow rate and coating thickness during the coating process. It is mainly divided into choke block regulating mechanisms, bolt regulating mechanisms, and automatic regulating mechanisms, with the choke block regulating mechanism being the most commonly used. The choke block regulating mechanism includes a fixed component and an regulating component. The fixed component includes a support and fixing parts, while the regulating component includes a choke block, regulating rod, drive device, connecting rod, and regulating seat. By placing a choke block within the coating slit, the height of the slit is changed, thereby regulating the slurry flow rate and coating thickness. The choke block is controlled by a drive device such as a micrometer or motor via the regulating rod, enabling it to move along... Figure 1 It reciprocates along the Y-axis.

[0065] In the slurry coating die head 100 of this utility model embodiment, such as Figure 1 and Figure 2 As shown, the slurry coating die 100 also includes an adjustment mechanism 30, which includes a fixing component 301 and an adjustment component 302. The fixing component 301 is fixedly connected to the slurry conveying component 10, and the adjustment component 302 is movable relative to the fixing component 301 to adjust the cross-sectional size of the slit 15, thereby enabling the slurry coating die 100 to precisely control the flow rate and velocity of the slurry. Meanwhile, as... Figure 3 As shown, the pressure sensor unit 20 includes a first pressure sensor assembly 21. Along the direction of relative movement between the adjustment assembly 302 and the fixed assembly 301, the projection of the first pressure sensor assembly 21 at least partially overlaps with the projection of the adjustment assembly 302. This allows the first pressure sensor assembly 21 to monitor the pressure of the matching slurry in real time, and the adjustment mechanism 30 can directly adjust the cross-sectional size of the slit 15 in a timely manner based on the feedback from the pressure sensor assembly 21, thereby ensuring the flow rate and velocity of the slurry during the coating process, thus ensuring the uniformity and stability of the coating.

[0066] Optionally, refer to Figure 3 The pressure sensor unit 20 also includes a second pressure sensor assembly 22, which is located between the opening 151 and the first pressure sensor assembly 21.

[0067] In the slurry coating die head 100 of this utility model embodiment, such as Figure 2As shown, the pressure sensor unit 20 also includes a second pressure sensor assembly 22 located between the opening 151 and the first pressure sensor assembly 21. By setting the second pressure sensor assembly 22, pressure monitoring is expanded from a single array to a multi-array array, thereby enabling the collection of more pressure data. This allows for comprehensive analysis and cross-verification of the pressure data, improving the accuracy of pressure detection. Furthermore, placing the second pressure sensor assembly 22 between the opening 151 and the first pressure sensor assembly 21 allows the second pressure sensor assembly 22 to be closer to the opening 151 of the slit 15, thus enabling more accurate detection of the pressure of the slurry flowing out of the slurry coating die head 100.

[0068] In the slurry coating die 100 of this utility model embodiment, such as Figure 4 As shown, the pressure sensor unit 20 may further include a third pressure sensor assembly 23, which is located between the second pressure sensor assembly 22 and the opening 151. This allows the third pressure sensor assembly 23 to be closer to the opening 151 of the slit 15, thereby enabling more accurate detection of the pressure of the slurry flowing out of the slurry coating die 100. Furthermore, the pressure sensor unit 20 may include more pressure sensor assemblies, allowing for better monitoring of different parts of the slit 15 and obtaining more comprehensive pressure data.

[0069] Optionally, refer to Figure 4 The first pressure sensor assembly 21 includes a plurality of first pressure sensors 211, and the number of adjustment mechanisms 30 is also a plurality, wherein the number of first pressure sensors 211 and the number of adjustment mechanisms 30 are equal.

[0070] Multiple adjustment mechanisms 30 are evenly arranged along the first direction Z. Multiple first pressure sensors 211 correspond one-to-one with the positions of multiple adjustment mechanisms 30. The first direction Z is perpendicular to the slurry flow direction X and perpendicular to the movement direction Y of the adjustment component 302.

[0071] In the slurry coating die 100 of this utility model embodiment, such as Figure 4As shown, the first pressure sensor assembly 21 includes multiple first pressure sensors 211 and multiple adjustment mechanisms 30. The number of first pressure sensors 211 and the number of adjustment mechanisms 30 are equal. All adjustment mechanisms 30 are uniformly arranged along the first direction Z, and the positions of the multiple first pressure sensors 211 and the multiple adjustment mechanisms 30 correspond one-to-one. This allows the first pressure sensors 211 to simultaneously monitor pressure changes at different locations inside the die head, and the corresponding adjustment mechanisms 30 can adjust the pressure based on this pressure data. This enables precise control of the coating process and ensures that the slurry flow and coating thickness in each local area meet the process requirements. The uniform arrangement of the multiple adjustment mechanisms 30 and the multiple first pressure sensors 211 along the first direction Z facilitates the installation, disassembly, and maintenance of the adjustment mechanisms 30 and the first pressure sensors 211.

[0072] In the slurry coating die head 100 of this utility model embodiment, such as Figure 1 As shown, the X-axis is the direction of slurry flow, the Y-axis is the direction of movement of the adjustment component 302, and the first direction Z is perpendicular to both the slurry flow direction and the movement direction of the adjustment component 302, that is, the Z-axis is a plane perpendicular to the X-axis and the Y-axis.

[0073] In the slurry coating die head 100 of this utility model embodiment, such as Figure 3 As shown, the second pressure sensor assembly 22 may also include multiple second pressure sensors 221, which are also evenly arranged along the first direction Z. By setting multiple second pressure sensors 221, it is possible to simultaneously monitor pressure changes at different locations inside the die head. Figure 4 As shown, the third pressure sensor assembly 23 may also include multiple third pressure sensors 231, which are also evenly arranged along the first direction Z. By setting multiple third pressure sensors 231, it can also monitor the pressure changes at different positions inside the mold head at the same time.

[0074] Optionally, refer to Figure 3 The first pressure sensor 211 includes at least two measuring elements 2111, which are used to detect the pressure generated by the slurry in a coordinated manner.

[0075] The measuring element in a pressure sensor is the core component that converts pressure changes into electrical signals. Based on different working principles, measuring elements can be divided into several types, the most common being piezoresistive and capacitive measuring elements. Piezoresistive measuring elements are based on the piezoresistive effect, meaning that the resistance of a material changes when subjected to pressure. These elements typically use semiconductor materials such as silicon or metal strain gauges. When pressure is applied to the measuring diaphragm, the diaphragm deforms, causing a change in the resistance of the strain gauge. This change in resistance is then converted into an electrical signal through a bridge circuit. Capacitive measuring elements, on the other hand, measure pressure by detecting changes in capacitance caused by pressure changes. Their structure typically includes a variable capacitor. When pressure is applied to the diaphragm, the deformation of the diaphragm changes the spacing or area of ​​the capacitor plates, resulting in a change in capacitance. By measuring the change in capacitance, the magnitude of the pressure can be calculated.

[0076] In the slurry coating die head 100 of this utility model embodiment, such as Figure 3 As shown, the first pressure sensor 211 includes multiple measuring elements 2111. When these multiple measuring elements 2111 work together, they can more comprehensively detect changes in slurry pressure, thereby reducing errors caused by single-point measurements. This multi-point collaborative detection method provides more accurate pressure data, even under complex operating conditions, thus improving data accuracy. Figure 4 As shown, when the accuracy requirement for pressure measurement in the slurry coating die head 100 is low, only one measuring element 2111 can be set in the first pressure sensor 211, so that the measurement requirements can be met while the cost can be effectively reduced.

[0077] Optionally, refer to Figure 1 , Figure 2 and Figure 5 The slurry coating die head 100 also includes a displacement sensor 40 and a flow-blocking block 50. The displacement sensor 40 is fixedly connected to the fixing component 301 or the adjusting component 302. The flow-blocking block 50 is located at one end of the adjusting component 302 near the slit 15 and is fixedly connected to the adjusting component 302. The displacement sensor 40 is used to measure the displacement of the flow-blocking block 50 in the movement direction Y of the adjusting component 302.

[0078] In the slurry coating die head 100 of this utility model embodiment, such as Figure 1 , Figure 2 and Figure 5As shown, the slurry coating die head 100 also includes a displacement sensor 40 and a flow-blocking block 50. The displacement sensor 40 is fixedly connected to the fixing component 301 or the adjusting component 302. The flow-blocking block 50 is located at one end of the adjusting component 302 near the slit 15 and is fixedly connected to the adjusting component 302. The displacement sensor 40 is used to measure the displacement of the flow-blocking block 50 in the direction of movement of the adjusting component 302. Therefore, the displacement sensor 40 can monitor the displacement change of the flow-blocking block 50 in the direction of movement of the adjusting component 302 in real time, thereby accurately controlling the flow rate and velocity of the slurry, and thus controlling the coating thickness.

[0079] In the slurry coating die head 100 of this utility model embodiment, such as Figure 2 and Figure 5 As shown, when the displacement sensor 40 is fixedly connected to the fixed component 301, the displacement sensor 40 remains stationary, while the flow-blocking block 50 moves together with the adjusting component 302. The displacement sensor 40 can monitor the displacement change of the flow-blocking block 50 in real time. Since the displacement sensor 40 is stationary and uses the fixed component 301 as a reference, and this reference is relatively stable, the displacement sensor 40 can accurately sense the displacement change of the flow-blocking block 50 relative to the fixed component 301 during the measurement process, thereby ensuring the reliability of the measurement data and reducing errors caused by the movement of the measurement reference. When the displacement sensor 40 is fixedly connected to the adjusting component 302, both the displacement sensor 40 and the flow-blocking block 50 move together with the adjusting component 302. The movement of the displacement sensor 40 and the flow-blocking block 50 together allows for flexible tracking of the movement trajectory of the flow-blocking block 50, thereby accurately measuring the relative displacement of the flow-blocking block 50 relative to the fixed component 301. In some complex fluid regulation devices, the flow obstruction block 50 may need to undergo multi-directional or non-linear motion to regulate the flow rate and direction of the fluid. Fixing the displacement sensor 40 to the regulating component 302 allows for real-time monitoring of this complex motion process, providing accurate motion information to the control system. Both of these implementation methods aim to monitor the displacement changes of the flow obstruction block 50 and meet the design requirements of this application. The displacement sensor 40 then monitors the displacement changes of the flow obstruction block 50 and feeds the data back to the control system, which in turn adjusts the flow rate and velocity of the slurry. The displacement sensor 40 can monitor the displacement changes of the flow obstruction block 50 in real time, thus verifying the adjustment distance given by the pressure sensor and improving the fault tolerance of the slurry coating die 100. The displacement sensor 40 can also be mounted on the die of the slurry conveying component 10 and fixedly connected to it. When the regulating component 302 moves, the displacement sensor 40 can also monitor the change in distance between the regulating component 302 and the die in real time.

[0080] Optionally, refer to Figure 6 and Figure 7The main cavity 12 includes a first main cavity 121, the connecting channel 13 includes a first connecting channel 131, the secondary cavity 14 includes a first secondary cavity 141, and the slit 15 includes a first slit 16.

[0081] The slurry conveying component 10 includes a first die head 101 and a second die head 102, which are connected to form a first slit 16;

[0082] The second mold head 102 is provided with a first main cavity 121, a first connecting channel 131 and a first secondary cavity 141. The first main cavity 121 and the first secondary cavity 141 are connected through the first connecting channel 131, and the first secondary cavity 141 is connected to the first slit 16.

[0083] The first slit 16 includes a first opening 161 and a first main body 162. The first opening 161 is located at the end of the first slit 16 away from the first secondary cavity 141, and the first main body 162 is located at the end of the first slit 16 close to the first secondary cavity 141.

[0084] The pressure sensor unit 20 is disposed at the first main body portion 162. In the slurry coating die head 100 of this embodiment of the present invention, as shown... Figure 6 and Figure 7 As shown, the first die head 101 and the second die head 102 are connected to form a first slit 16. The second die head 102 is provided with a first main cavity 121, a first connecting channel 131, and a first secondary cavity 141. The first main cavity 121 and the first secondary cavity 141 are connected through the first connecting channel 131. The first slit 16 includes a first opening 161 and a first main body 162. The first opening 161 is located at the end of the first slit 16 away from the first secondary cavity 141, and the first main body 162 is located at the end of the first slit 16 near the first secondary cavity 141. A pressure sensor unit 20 is disposed at the first main body 162. By providing a pressure sensor unit at the first main body 162 of the first slit 16 of the slurry coating die head 100, a more accurate pressure distribution near the first opening 161 of the first slit 16 of the slurry coating die head 100 can be fully detected, thereby providing more accurate data for the adjustment of the coating surface density adjustment mechanism, and thus ensuring the lateral consistency of the coating surface density.

[0085] Optionally, refer to Figure 6 A first groove 1022 is provided on the first mold head 101 or the second mold head 102, and the adjustment mechanism 30 is located on the first mold head 101 or the second mold head 102, with the first groove 1022 and the adjustment mechanism 30 being disposed opposite to each other;

[0086] The first groove 1022 is located at the first main body 162, and the first groove 1022 is used to place the pressure sensor unit 20.

[0087] In the slurry coating die 100 of this utility model embodiment, such as Figure 6 As shown, a first groove 1022 is provided on the first die head 101 or the second die head 102. The adjustment mechanism 30 is located on the first die head 101 or the second die head 102. The first groove 1022 is arranged opposite to the adjustment mechanism 30. As can be seen from the above embodiment, the first pressure sensor 211 also corresponds to the position of the adjustment mechanism 30. Therefore, the first groove 1022 is arranged opposite to the adjustment mechanism 30 to facilitate the subsequent placement of the first pressure sensor 211 in the first groove 1022. The first groove 1022 is located at the first main body 162. By placing the pressure sensor unit 20 in the first groove 1022, the stability of the pressure sensor unit 20 is improved on the one hand, and the interference of other components of the slurry coating die head 100 on the other hand is avoided. At the same time, it also ensures the rational use of the internal space of the die head, making the entire coating die head arrangement more compact.

[0088] In the slurry coating die head 100 of this utility model embodiment, the position of the first groove 1022 can be set on the first die head 101 or on the second die head 102, but the first groove 1022 should be set opposite to the adjustment mechanism 30. In addition, it is necessary to ensure that the pressure sensor unit 20 can be stably installed on the slurry coating die head 100.

[0089] Optionally, refer to Figure 8 and Figure 9 The main cavity 12 includes a second main cavity 122 and a third main cavity 123, the connecting channel 13 includes a second connecting channel 132 and a third connecting channel 133, the secondary cavity 14 includes a second secondary cavity 142 and a third secondary cavity 143, and the slit 15 includes a second slit 17 and a third slit 18.

[0090] The slurry conveying component 10 includes a third die head 103, a fourth die head 104 and a fifth die head 105. The third die head 103 and the fourth die head 104 are connected to form a second slit 17, and the fourth die head 104 and the fifth die head 105 are connected to form a third slit 18.

[0091] The fourth mold head 104 is provided with a second main cavity 122, a second connecting channel 132 and a second auxiliary cavity 142. The second main cavity 122 and the second auxiliary cavity 142 are connected through the second connecting channel 132, and the second auxiliary cavity 142 is connected to the second slit 17.

[0092] The fifth mold head 105 is provided with a third main cavity 123, a third connecting channel 133 and a third secondary cavity 143. The third main cavity 123 and the third secondary cavity 143 are connected through the third connecting channel 133, and the third secondary cavity 143 is connected to the third slit 18.

[0093] The second slit 17 includes a second opening 171 and a second main body 172. The second opening 171 is located at the end of the second slit 17 away from the second secondary cavity 142, and the second main body 172 is located at the end of the second slit 17 close to the second secondary cavity 142.

[0094] The third slit 18 includes a third opening 181 and a third main body 182. The third opening 181 is located at the end of the third slit 18 away from the third secondary cavity 143, and the third main body 182 is located at the end of the third slit 18 close to the third secondary cavity 143.

[0095] There are two pressure sensor units 20, one pressure sensor unit 20 is located at the second main body 172, and the other pressure sensor unit 20 is located at the third main body 182.

[0096] In the slurry coating die 100 of this utility model embodiment, such as Figure 9 As shown, the third mold head 103 and the fourth mold head 104 are connected to form the second slit 17, and the fourth mold head 104 and the fifth mold head 105 are connected to form the third slit 18. The fourth mold head 104 is provided with a second main cavity 122, a second connecting channel 132 and a second auxiliary cavity 142, which are connected through the second connecting channel 132. The fifth mold head 105 is provided with a third main cavity 123, a third connecting channel 133 and a third auxiliary cavity 143, which are connected through the third connecting channel 133. The two pressure sensor units 20 are respectively located at the second main body portion 172 of the second slit 17 and the third main body portion 182 of the third slit 18. By setting pressure sensor units 20 at the second main body 172 and the third main body 182 of the slurry coating die head 100, the pressure distribution at the second opening 171 near the second slit 17 and the third opening 181 near the third slit 18 of the slurry coating die head 100 can be accurately detected, thereby providing more precise data for the adjustment of the coating surface density adjustment mechanism and ensuring the lateral consistency of the coating surface density.

[0097] Optionally, refer to Figure 8 A second groove 1031 is provided on the third mold head 103 or the fourth mold head 104. Part of the adjustment mechanism 30 is located on the third mold head 103 or the fourth mold head 104. The second groove 1031 is arranged opposite to the adjustment mechanism 30. The second groove 1031 is located at the second main body 172.

[0098] A third groove 1032 is provided on the fourth mold head 104 or the fifth mold head 105, and another part of the adjustment mechanism 30 is located on the fourth mold head 104 or the fifth mold head 105. The third groove 1032 is arranged opposite to the adjustment mechanism 30 and is located at the third main body 182.

[0099] The second groove 1031 and the third groove 1032 are used to place the pressure sensor unit 20.

[0100] In the slurry coating die 100 of this utility model embodiment, such as Figure 8 As shown, a second groove 1031 is provided on the third mold head 103 or the fourth mold head 104. Part of the adjustment mechanism 30 is located on the third mold head 103 or the fourth mold head 104. The second groove 1031 is arranged opposite to the adjustment mechanism 30. As can be seen from the above embodiment, the first pressure sensor 211 is also corresponding to the position of the adjustment mechanism 30. Therefore, the second groove 1031 is arranged opposite to the adjustment mechanism 30 to facilitate the subsequent placement of part of the first pressure sensor 211 in the second groove 1031. The second groove 1031 is located at the second main body 172. A third groove 1032 is provided on the fourth die head 104 or the fifth die head 105. Another part of the adjustment mechanism 30 is located on the fourth die head 104 or the fifth die head 105. The third groove 1032 is positioned opposite to the adjustment mechanism 30. As can be seen from the above embodiment, the first pressure sensor 211 also corresponds to the position of the adjustment mechanism 30. Therefore, positioning the third groove 1032 opposite to the adjustment mechanism 30 facilitates the subsequent placement of another part of the first pressure sensor 211 within the third groove 1032. The third groove 1032 is located at the third main body 182. By placing the two pressure sensor units 20 in the second groove 1031 and the third groove 1032 respectively, the stability of the pressure sensor units 20 is improved, and interference from other components of the slurry coating die head 100 is avoided. Simultaneously, the internal space of the die head is utilized efficiently, making the entire coating die head arrangement more compact.

[0101] In the slurry coating die 100 of this embodiment, the second groove 1031 can be located on either the third die 103 or the fourth die 104. However, the second groove 1031 should be positioned opposite to the adjustment mechanism 30, and it is also necessary to ensure that the pressure sensor unit 20 can be stably mounted on the slurry coating die 100. Similarly, the third groove 1032 can be located on either the fourth die 104 or the fifth die 105. Again, the third groove 1032 should be positioned opposite to the adjustment mechanism 30, and it is also necessary to ensure that the pressure sensor unit 20 can be stably mounted on the slurry coating die 100.

[0102] For multi-layer slurry coating dies with more than two layers, the design can be based on the design scheme of a double-layer slurry coating die. The pressure sensor unit 20 is placed inside the slit 15 of the multi-layer slurry coating die and located at the main body 152 of the multi-layer slurry coating die. The position, shape, size, and connection relationship of components such as the fixing component 301, the adjusting component 302, the pressure sensor component, the displacement sensor 40, and the flow blocking block 50 are further designed according to the above design scheme. This allows the multi-layer slurry coating die to detect a more accurate pressure distribution near the opening of the slit of the slurry coating die, thereby providing more accurate data for the adjustment of the coating surface density adjustment mechanism and ensuring the lateral consistency of the coating surface density.

[0103] Optionally, refer to Figure 10 The slurry coating equipment includes an upper computer 200, a lower computer 300, and any of the above-mentioned slurry coating die heads 100;

[0104] The slurry coating die head 100 is electrically connected to the host computer 200, the host computer 200 is electrically connected to the slave computer 300, and the slave computer 300 is also electrically connected to the slurry coating die head 100.

[0105] The host computer 200 triggers the slave computer 300 to adjust and control the coating flow rate of the slurry coating die head 100 based on the pressure signal transmitted by the slurry coating die head 100.

[0106] The host computer 200 typically refers to a higher-level device located at the system control level, primarily responsible for overall monitoring, management, data processing, and decision-making. It is usually a computer or server-based system running advanced control software. The host computer 200 receives raw data from the lower-level devices 300 or sensors, analyzes and processes it, and generates meaningful information. The host computer 200 is typically equipped with a graphical user interface (GUI), allowing operators to monitor equipment status, adjust process parameters, view historical data, or generate reports. Based on preset control strategies or algorithms, the host computer 200 analyzes the collected data and makes decisions.

[0107] The lower-level device (300) is located at the system control level and is primarily responsible for executing specific control tasks or directly interacting with the controlled object. It is typically based on a PLC (Programmable Logic Controller), a microcontroller, or a dedicated controller. The lower-level device (300) directly controls hardware devices such as motors, valves, and sensors according to instructions from the upper-level computer. The lower-level device (300) usually has high real-time performance, enabling it to quickly respond to instructions from the upper-level computer or changes in field devices.

[0108] In the slurry coating equipment of this utility model embodiment, such as Figure 10As shown, the slurry coating equipment consists of a host computer 200, a slave computer 300, and a slurry coating die 100. These components are electrically connected to achieve signal transmission and control. The slurry coating die 100 is primarily responsible for signal acquisition and transmission. The pressure sensor unit within the die 100 monitors the pressure changes of the slurry within the coating slit in real time and converts these pressure signals into electrical signals. Simultaneously, the pressure sensor unit 200 transmits these electrical signals to the host computer 200, which is an advanced control unit typically equipped with data processing and analysis functions to receive and process the pressure signals from the die. The host computer 200 analyzes and processes the received pressure signals, determining whether the current slurry flow state meets the preset process requirements. Based on the analysis results, the host computer 200 determines whether the coating flow rate needs adjustment. If the pressure signal indicates a problem with the slurry flow, the host computer 200 triggers the slave computer 300 to perform corresponding control operations. When the slave computer 300 receives control commands from the master computer 200, the slave computer 300 adjusts the regulating mechanism of the slurry coating die head 100 according to the commands to change the coating flow rate and restore the slurry flow state to the ideal range. The adjusted slurry flow state is monitored again by the pressure sensor, and the new pressure signal is transmitted back to the master computer 200. The master computer 200 continues to evaluate and adjust the control commands based on the new pressure signal, forming a closed-loop control system to ensure the stability and consistency of the coating process.

[0109] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

Claims

1. A slurry coating die (100), characterized in that, The slurry coating die (100) includes a slurry conveying component (10) and a pressure sensor unit (20); The slurry conveying component (10) is provided with a feed inlet (11), a main cavity (12), a connecting channel (13), a secondary cavity (14), and a slit (15). The feed inlet (11) is connected to the main cavity (12). The main cavity (12) and the secondary cavity (14) are connected through the connecting channel (13). The secondary cavity (14) is connected to the slit (15). The slit (15) includes an opening (151) and a main body (152). The opening (151) is located at the end of the slit (15) away from the secondary cavity (14), and the main body (152) is located at the end of the slit (15) close to the secondary cavity (14). The pressure sensor unit (20) is disposed at the main body (152).

2. The slurry coating die (100) according to claim 1, characterized in that, The slurry coating die (100) also includes an adjustment mechanism (30), which includes a fixing component (301) and an adjustment component (302). The fixing component (301) is fixedly connected to the slurry conveying component (10), and the adjustment component (302) is movable relative to the fixing component (301) to adjust the cross-sectional size of the slit (15). The pressure sensor unit (20) includes a first pressure sensor assembly (21), and along the direction of relative movement between the adjustment assembly (302) and the fixing assembly (301), the projection of the first pressure sensor assembly (21) at least partially overlaps with the projection of the adjustment assembly (302).

3. The slurry coating die (100) according to claim 2, characterized in that, The pressure sensor unit (20) further includes a second pressure sensor assembly (22), which is located between the opening (151) and the first pressure sensor assembly (21).

4. The slurry coating die (100) according to claim 3, characterized in that, The first pressure sensor assembly (21) includes a plurality of first pressure sensors (211), and the number of adjustment mechanisms (30) is a plurality of, wherein the number of first pressure sensors (211) and the number of adjustment mechanisms (30) are equal; The multiple adjustment mechanisms (30) are evenly arranged along the first direction (Z), and the positions of the multiple first pressure sensors (211) correspond one-to-one with the positions of the multiple adjustment mechanisms (30). The first direction (Z) is perpendicular to the flow direction (X) of the slurry and perpendicular to the movement direction (Y) of the adjustment assembly (302).

5. The slurry coating die (100) according to claim 4, characterized in that, The first pressure sensor (211) includes at least two measuring elements (2111), which are used to detect the pressure generated by the slurry in a coordinated manner.

6. The slurry coating die (100) according to claim 2, characterized in that, The slurry coating die (100) further includes a displacement sensor (40) and a flow-blocking block (50). The displacement sensor (40) is fixedly connected to the fixing component (301) or the adjusting component (302). The flow-blocking block (50) is located at one end of the adjusting component (302) near the slit (15) and is fixedly connected to the adjusting component (302). The displacement sensor (40) is used to measure the displacement of the flow-blocking block (50) in the direction of movement (Y) of the adjusting component (302).

7. The slurry coating die (100) according to claim 2, characterized in that, The main cavity (12) includes a first main cavity (121), the connecting channel (13) includes a first connecting channel (131), the secondary cavity (14) includes a first secondary cavity (141), and the slit (15) includes a first slit (16). The slurry conveying component (10) includes a first die head (101) and a second die head (102), the first die head (101) and the second die head (102) being connected to form the first slit (16); The second mold head (102) is provided with the first main cavity (121), the first connecting channel (131) and the first secondary cavity (141). The first main cavity (121) and the first secondary cavity (141) are connected through the first connecting channel (131), and the first secondary cavity (141) is connected to the first slit (16). The first slit (16) includes a first opening (161) and a first main body (162). The first opening (161) is located at the end of the first slit (16) away from the first secondary cavity (141), and the first main body (162) is located at the end of the first slit (16) close to the first secondary cavity (141). The pressure sensor unit (20) is disposed at the first main body (162).

8. The slurry coating die (100) according to claim 7, characterized in that, A first groove (1022) is provided on the first mold head (101) or the second mold head (102), and the adjustment mechanism (30) is located on the first mold head (101) or the second mold head (102), with the first groove (1022) and the adjustment mechanism (30) being disposed opposite to each other; The first groove (1022) is located at the first main body (162) and is used to place the pressure sensor unit (20).

9. The slurry coating die (100) according to claim 4, characterized in that, The main cavity (12) includes a second main cavity (122) and a third main cavity (123), the connecting channel (13) includes a second connecting channel (132) and a third connecting channel (133), the secondary cavity (14) includes a second secondary cavity (142) and a third secondary cavity (143), and the slit (15) includes a second slit (17) and a third slit (18). The slurry conveying component (10) includes a third die head (103), a fourth die head (104) and a fifth die head (105). The third die head (103) and the fourth die head (104) are connected to form the second slit (17), and the fourth die head (104) and the fifth die head (105) are connected to form the third slit (18). The fourth mold head (104) is provided with a second main cavity (122), a second connecting channel (132) and a second secondary cavity (142). The second main cavity (122) and the second secondary cavity (142) are connected through the second connecting channel (132), and the second secondary cavity (142) is connected to the second slit (17). The fifth mold head (105) is provided with the third main cavity (123), the third connecting channel (133) and the third secondary cavity (143). The third main cavity (123) and the third secondary cavity (143) are connected through the third connecting channel (133), and the third secondary cavity (143) is connected to the third slit (18). The second slit (17) includes a second opening (171) and a second main body (172). The second opening (171) is located at the end of the second slit (17) away from the second secondary cavity (142), and the second main body (172) is located at the end of the second slit (17) close to the second secondary cavity (142). The third slit (18) includes a third opening (181) and a third main body (182). The third opening (181) is located at the end of the third slit (18) away from the third secondary cavity (143), and the third main body (182) is located at the end of the third slit (18) close to the third secondary cavity (143). There are two pressure sensor units (20), one of which is located at the second main body (172), and the other is located at the third main body (182).

10. The slurry coating die (100) according to claim 9, characterized in that, A second groove (1031) is provided on the third mold head (103) or the fourth mold head (104), and part of the adjustment mechanism (30) is located on the third mold head (103) or the fourth mold head (104). The second groove (1031) is disposed opposite to part of the adjustment mechanism (30), and the second groove (1031) is located at the second main body part (172). A third groove (1032) is provided on the fourth mold head (104) or the fifth mold head (105), and another part of the adjustment mechanism (30) is located on the fourth mold head (104) or the fifth mold head (105). The third groove (1032) is disposed opposite to the other part of the adjustment mechanism (30), and the third groove (1032) is located at the third main body part (182). The second groove (1031) and the third groove (1032) are used to place the pressure sensor unit (20).

11. A slurry coating device, characterized in that, The slurry coating equipment includes a host computer (200), a slave computer (300), and a slurry coating die head (100) as described in any one of claims 1 to 10; The slurry coating die head (100) is electrically connected to the host computer (200), the host computer (200) is electrically connected to the slave computer (300), and the slave computer (300) is also electrically connected to the slurry coating die head (100). The host computer (200) triggers the slave computer (300) to adjust and control the coating flow rate of the slurry coating die (100) based on the pressure signal transmitted by the slurry coating die (100).

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