WO2024074117A1 - 涂布模头和具有其的涂布设备 - Google Patents

涂布模头和具有其的涂布设备 Download PDF

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Publication number
WO2024074117A1
WO2024074117A1 PCT/CN2023/122589 CN2023122589W WO2024074117A1 WO 2024074117 A1 WO2024074117 A1 WO 2024074117A1 CN 2023122589 W CN2023122589 W CN 2023122589W WO 2024074117 A1 WO2024074117 A1 WO 2024074117A1
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WO
WIPO (PCT)
Prior art keywords
cavity
pressure regulating
regulating block
cavity pressure
coating die
Prior art date
Application number
PCT/CN2023/122589
Other languages
English (en)
French (fr)
Inventor
刘旭永
蒲晶晶
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2024074117A1 publication Critical patent/WO2024074117A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of coating technology, and in particular to a coating die head and a coating device having the same.
  • both the positive and negative electrode sheets are made using a coating process.
  • the coating weight is closely related to the safety of the battery cells and is one of the key control points in the production of battery cells.
  • there are large differences in the coating weights of different types of battery cells and different battery cells use different slurries.
  • the embodiments of the present application provide a coating die head and a coating device having the same, which can effectively solve the problem of pressure fluctuation in the material chamber, improve the problem of material seepage, reduce material loss, improve process efficiency, and reduce manufacturing costs.
  • the embodiment of the present application provides a coating die, comprising: a die body, the die body having a material cavity, the first wall of the material cavity having a perforation; a cavity pressure regulating block, the cavity pressure regulating block is arranged in the material cavity, the cavity pressure regulating block has a cavity, the cavity pressure regulating block is configured to change the volume as the pressure of the cavity changes, the side wall of the cavity pressure regulating block facing the first wall is the second wall, the second wall is in contact with the first wall and surrounds the area where the perforation is located; a regulating component, the regulating component is suitable for communicating with the cavity through the perforation, and is used to transport or extract fluid into the cavity, so as to adjust the volume of the cavity pressure regulating block by changing the pressure of the cavity.
  • the problem of coating weight fluctuation can be effectively improved, and the problem of material seepage can be avoided, and material loss can be reduced, process efficiency can be improved, and manufacturing cost can be reduced.
  • the cavity pressure regulating block is detachably connected to the die body.
  • different cavity pressure regulating blocks can be replaced according to needs to meet different practical needs.
  • the cavity pressure regulating block is detachably connected to the die body via a threaded connector penetrating the first wall and the second wall.
  • the cavity pressure regulating block can be easily replaced, and the installation stability of the cavity pressure regulating block can be improved to ensure good fit between the first wall and the second wall.
  • the cavity pressure regulating blocks are multiple and arranged in sequence along the length direction of the material cavity.
  • the volume of each cavity pressure regulating block is relatively small, and the regulating component can easily adjust the volume change of each cavity pressure regulating block, and the adjustment accuracy is high.
  • the cavity pressure regulating block is one and its length direction is parallel to the length direction of the material cavity.
  • the cavity pressure regulating block has a simple structure, is easy to process, and is easy to install, disassemble and replace, which can reduce costs.
  • the cavity pressure regulating blocks are respectively provided at both ends of the cavity along the length direction.
  • the location of the cavity pressure regulating blocks has little effect on the material flow, thereby improving the flow uniformity of the slurry in the cavity.
  • the die body has an outlet and an inlet connected to the material cavity, and when the cavity pressure regulating block is configured to expand to the limit state, there is still a material passage space between the cavity pressure regulating block and the material cavity that connects the inlet and the outlet.
  • the die body has a discharge port connected to the material cavity, and the cavity pressure regulating block is arranged on a side of the material cavity away from the discharge port, or the cavity pressure regulating block is arranged at a central position of the material cavity.
  • the die body includes a plurality of die monomers and a gasket disposed between two adjacent die monomers
  • the gasket includes a sheet body portion and a notch portion
  • the gasket forms a discharge slit with the corresponding two die monomers through the notch portion
  • the cavity pressure regulating block is disposed corresponding to the sheet body portion.
  • the cavity pressure regulating block can be disposed to avoid the discharge slit, thereby reducing the influence of the cavity pressure regulating block on the discharge uniformity and improving the consistency of the coating weight.
  • the regulating component includes a pressure regulating part and a flow channel tube, the pressure regulating part is arranged on the flow channel tube, the flow channel tube is passed through the perforation and communicated with the cavity.
  • the structure of the regulating component is simple and the cost is low. By setting the flow channel tube passed through the perforation, it is easy to communicate with the cavity of the cavity pressure regulating block, reducing the difficulty of installing the regulating component and further improving the problem of material seepage.
  • each of the cavity pressure regulating blocks is correspondingly connected to at least one of the flow channel tubes.
  • each cavity pressure regulating block can simply and effectively obtain a relatively effective and rapid volume regulation effect.
  • the flow channel tubes and the cavity pressure regulating blocks are both multiple and arranged in one-to-one correspondence.
  • the pressure regulating member is multiple and is arranged one-to-one with the multiple flow channel tubes.
  • each cavity pressure regulating block can be adjusted individually.
  • At least two of the flow channel tubes are provided corresponding to the same pressure regulating member.
  • at least two cavity pressure regulating blocks can be adjusted simultaneously, thereby simplifying control and reducing costs.
  • the regulating assembly further comprises a connecting pipe, which is disposed in the material cavity and connects the cavities of the plurality of cavity pressure regulating blocks.
  • the cavity pressure regulating block has an opening corresponding to the through hole, and the opening is connected to the cavity.
  • the opening is connected, and a backflow prevention element is provided at the opening.
  • the end of the flow channel tube is suitable for extending into the cavity through the backflow prevention element and the opening.
  • the backflow prevention element is used to close the opening when the flow channel tube is withdrawn from the opening.
  • the flow tube is provided with a pressure gauge.
  • the pressure in the cavity pressure regulating block can be monitored in real time by the pressure gauge, thereby facilitating effective regulation of the volume of the cavity pressure regulating block.
  • the coating die head further comprises: a detection device, the detection device comprises a pressure sensor for detecting the pressure of the material cavity, and the sensing head of the pressure sensor is exposed in the material cavity.
  • a detection device comprises a pressure sensor for detecting the pressure of the material cavity
  • the sensing head of the pressure sensor is exposed in the material cavity.
  • At least one of the pressure sensors is installed on the cavity pressure regulating block. In the above technical solution, it is helpful to ensure the pressure measurement accuracy of the pressure sensor.
  • the detection device includes a plurality of pressure sensors spaced apart along the length direction of the material cavity.
  • the detection device is electrically connected to the regulating component so that the regulating component can be adjusted accordingly according to the pressure of the material chamber detected by the pressure sensor.
  • automatic pressure adjustment can be achieved, eliminating manual operation and reliably ensuring the consistency of coating weight.
  • the material cavity is divided into a plurality of regions, each of which is provided with at least one pressure sensor, and each of which is provided with at least one cavity pressure regulating block.
  • the control component can adjust the cavity pressure regulating block of the corresponding region according to the pressure sensor of each region, so as to specifically adjust the volume of each cavity pressure regulating block, so as to achieve the effect of controlling the pressure of the material cavity to be stable and uniform.
  • the coating die head further comprises: a guide member, which is arranged in the material cavity and is used to guide the cavity pressure regulating block to expand in a directional manner.
  • a guide member which is arranged in the material cavity and is used to guide the cavity pressure regulating block to expand in a directional manner.
  • the cavity pressure regulating block can expand in a directional manner instead of in a random manner, thereby meeting different design requirements.
  • the cavity pressure regulating block is a rubber piece or a silicone piece. In the above technical solution, it can have a better cavity pressure regulating effect, a longer service life, and a better sealing and anti-seepage effect.
  • an embodiment of the present application further provides a coating device, comprising the above-mentioned coating die head.
  • FIG1 is an exploded view of the structure of a coating die provided in some embodiments of the present application.
  • FIG2 is a cross-sectional view of the structure of a coating die provided in some embodiments of the present application.
  • FIG3 is an exploded view of the structure of a coating die provided in some embodiments of the present application.
  • FIG4 is an exploded view of the structure of a coating die provided in some embodiments of the present application.
  • FIG5 is a cross-sectional view of the structure of a coating die provided in some embodiments of the present application.
  • FIG6 is a cross-sectional view of the structure of a coating die provided in some embodiments of the present application.
  • FIG7 is an assembly diagram of a cavity pressure regulating block and a regulating component provided in some embodiments of the present application.
  • FIG8 is an assembly diagram of a cavity pressure regulating block and a backflow prevention element provided in some embodiments of the present application.
  • FIG. 9 is a cross-sectional view of the structure of a coating die provided in some embodiments of the present application.
  • Icons 100-coating die; 1-die body; 10-material cavity; 101-first wall; 102-perforation; 103-material passing space; 11-upper die; 12-lower die; a-die monomer; 13-gasket; 131-body; 132-notch; 14-discharge slit; 15-feed port; 16-discharge port; 2-cavity pressure regulating block; 20-cavity; 21-second wall; 22-opening; 23-matching hole; 3-regulating component; 31-pressure regulating part; 32-flow channel pipe; 33-pressure gauge; 4-pressure sensor; 5-anti-backflow element; 6-guide.
  • the terms “installed”, “connected”, “connected”, and “attached” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.
  • Battery cells include electrode assemblies and electrolytes, and the electrode assemblies include positive electrode sheets, negative electrode sheets, and separators. Battery cells mainly rely on the movement of metal ions between positive electrode sheets and negative electrode sheets to work.
  • the positive electrode sheet includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector;
  • the positive current collector includes a positive current collector and a positive electrode ear, and the positive current collector is coated with a positive active material layer, and the positive electrode ear is not coated with a positive active material layer.
  • the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide.
  • the negative electrode sheet includes a negative current collector and a negative active material layer, and the negative active material layer is coated on the surface of the negative current collector; the negative current collector includes a negative current collector and a negative electrode ear, and the negative current collector is coated with a negative active material layer, and the negative electrode ear is not coated with a negative active material layer.
  • the negative electrode current collector may be made of copper, the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material may be carbon or silicon, etc.
  • the separator may be made of PP (polypropylene) or PE (polyethylene), etc.
  • both positive and negative electrode sheets are made using a coating process.
  • the coating process is to apply a thin layer of coating material in the form of liquid or powder on the surface of an object such as fabric, paper, metal foil or plate.
  • the positive electrode active material, conductive agent, adhesive and solvent are mixed and made into a paste-like viscous slurry, and then the paste-like viscous slurry is evenly, continuously or intermittently coated on the positive electrode current collector substrate (such as aluminum foil) to make a positive electrode sheet.
  • the coating die used in the coating process has a feed port, a discharge port, and a cavity connecting the feed port and the discharge port.
  • the external slurry enters the cavity through the feed port at a certain pressure and flows out through the discharge port to be coated on the substrate passing through the discharge port.
  • the coating weight is closely related to the safety of the battery cell and is one of the key control points in the production of battery cells.
  • the embodiment of the present application provides a coating die head with online adjustable cavity pressure.
  • the specific solution is to add one or more cavity pressure adjustment blocks 2 (i.e., the cavity pressure adjustment block 2 is made of expandable and shrinkable material) with adjustable volume in the coating die head 100, and the volume of the cavity 10 occupied by the cavity pressure adjustment block 2 is adjusted online, thereby achieving the effect of adjusting the pressure of the cavity 10.
  • This solves the problem of coating weight fluctuation caused by the mismatch of cavity 10 size or cavity 10 pressure fluctuation of the coating die head 100 during production, avoids the waste of resources caused by frequent replacement of the coating die head 100, or the increase of process costs, and avoids the serious material loss caused by cleaning the slurry settled in the cavity 10 or replacing the slurry.
  • the coating die head 100 provided in the embodiment of the present application can be, but is not limited to, used for the electrode piece. It can also be used for the production of other workpieces that require coating technology.
  • the coating die 100 includes: a die body 1, a cavity pressure regulating block 2 and a regulating component 3.
  • the die body 1 has a material cavity 10
  • the cavity pressure regulating block 2 is arranged in the material cavity 10
  • the cavity pressure regulating block 2 has a cavity 20
  • the cavity pressure regulating block 2 is configured to change the volume as the pressure of the cavity 20 changes
  • the wall of the material cavity 10 has a perforation 102
  • the regulating component 3 is suitable for communicating with the cavity 20 through the perforation 102, and is used to transport or extract fluid into the cavity 20, so as to adjust the volume of the cavity pressure regulating block 2 by changing the pressure of the cavity 20.
  • the die body 1 may include an upper die 11, a lower die 12 and a gasket 13, a material cavity 10 is formed between the upper die 11, the lower die 12 and the gasket 13, the gasket 13 is arranged between the upper die 11 and the lower die 12, so as to cooperate with the upper die 11 and the lower die 12 to form a discharge slit 14, a discharge port 16 is formed on the front side between the upper die 11 and the lower die 12, a feed port 15 is formed on at least one of the upper die 11 and the lower die 12 (for example, in conjunction with Figure 3, the feed port 15 can be formed on the rear side of the lower die 12), the feed port 15 is connected to the material cavity 10, and the material cavity 10 is connected to the discharge port 16 through the discharge slit 14.
  • the die body 1 may include at least three dies, such as a first die, a second die, a third die, a first gasket 13 and a second gasket 13 arranged from top to bottom, a first material cavity 10 is formed between the first die, the second die and the first gasket 13, a first discharge port 16 is formed between the first die and the second die, a first feed port 15 connected to the first material cavity 10 is formed on at least one of the first die and the second die, the first gasket 13 is arranged between the first die and the second die and cooperates with the first die and the second die to form a first discharge slit 14, and the first material cavity 10 is connected to the first discharge port 16 through the first discharge slit 14.
  • a first material cavity 10 is formed between the first die, the second die and the first gasket 13
  • a first discharge port 16 is formed between the first die and the second die
  • a first feed port 15 connected to the first material cavity 10 is formed on at least one of the first die and the second die
  • the first gasket 13 is
  • a second material cavity 10 is formed between the second die head, the third die head and the second gasket 13, a second discharge port 16 is formed between the second die head and the third die head, a second feed port 15 communicating with the second material cavity 10 is formed on at least one of the second die head and the third die head, the second gasket 13 is arranged between the second die head and the third die head and cooperates with the second die head and the third die head to form a second discharge slit 14, and the second material cavity 10 is communicated with the second discharge port 16 through the second discharge slit 14.
  • the number of material cavities 10 defined by the die body 1 is not limited.
  • the die body 1 may form only one material cavity 10, or the die body 1 may form two material cavities 10, one of which is the main material cavity 10 and the other is the auxiliary material cavity 10, the main material cavity 10 is connected to the feed port 15, the auxiliary material cavity 10 is connected to the discharge port 16, and the main material cavity 10 is connected to the auxiliary material cavity 10 through a communication path, so as to play a discharge buffer role.
  • a cavity pressure regulating block 2 is provided in at least one of the material cavities 10.
  • the die body 1 defines an upstream material cavity 10 (such as a main material cavity 10) and a downstream material cavity 10 (such as an auxiliary material cavity 10) that are interconnected
  • at least one cavity pressure regulating block 2 can be provided in the downstream material cavity 10, which can not only effectively improve the coating weight consistency, but also simplify the structure, reduce costs, and improve process efficiency.
  • At least one cavity pressure regulating block 2 can also be provided in the upstream material cavity 10, so as to improve the coating weight consistency to a certain extent; or, at least one cavity pressure regulating block 2 can also be provided in each material cavity 10, so as to more fully improve the coating weight consistency.
  • the cavity pressure regulating block 2 is an expandable and contractible elastic material piece.
  • the cavity 20 can change the volume of the cavity pressure regulating block 2 by adjusting the pressure of the cavity 20.
  • the cavity pressure regulating block 2 can be expanded and the volume can be increased by increasing the pressure of the cavity 20.
  • the cavity pressure regulating block 2 can be contracted and the volume can be reduced by reducing the pressure of the cavity 20.
  • the volume of the cavity pressure regulating block 2 is changed by the regulating component 3.
  • the regulating component 3 can deliver fluid into the cavity 20 of the cavity pressure regulating block 2, thereby increasing the pressure of the cavity 20, so that the cavity pressure regulating block 2 expands and increases in volume.
  • the regulating component 3 can also extract fluid from the cavity 20 of the cavity pressure regulating block 2, thereby reducing the pressure of the cavity 20, so that the cavity pressure regulating block 2 shrinks and reduces in volume.
  • the volume of the cavity pressure regulating block 2 can be adjusted online by the regulating component 3.
  • the specific composition of the regulating component 3 is not limited, and the manner in which the fluid is delivered to or extracted from the cavity 20 through the perforation 102 is not limited.
  • the regulating component 3 may include a pipeline plugged into the perforation 102 to deliver or extract the fluid to or from the cavity 20 through the pipeline; for another example, the regulating component 3 may not include a pipeline plugged into the perforation 102 to deliver or extract the fluid directly to or from the cavity 20 through the perforation 102, etc.
  • the specific type of "fluid” is not limited, for example, it may be gas or liquid, etc., which is not limited here.
  • the volume of the cavity pressure regulating block 2 when the volume of the cavity pressure regulating block 2 changes, the volume of the material cavity 10 in the die body 1 occupied by the cavity pressure regulating block 2 changes accordingly, thereby changing the effective volume of the material cavity 10 for accommodating the coating material, and then changing the pressure of the material cavity 10.
  • the volume of the cavity pressure regulating block 2 increases, the volume of the material cavity 10 in the die body 1 occupied by the cavity pressure regulating block 2 increases, thereby reducing the effective volume of the material cavity 10 for accommodating the coating material, thereby increasing the pressure of the material cavity 10; and when the volume of the cavity pressure regulating block 2 decreases, the volume of the material cavity 10 in the die body 1 occupied by the cavity pressure regulating block 2 decreases, thereby increasing the effective volume of the material cavity 10 for accommodating the coating material, thereby reducing the pressure of the material cavity 10.
  • the volume and pressure of the cavity 10 can be regulated online, thereby solving the problem of coating weight fluctuation caused by the size mismatch of the cavity 10 of the coating die 100 or the pressure fluctuation of the cavity 10 during the production process, avoiding the waste of resources caused by frequent replacement of the coating die 100, or increased process costs, and avoiding the serious material loss caused by cleaning the slurry settled in the cavity 10 or replacing the slurry, thereby improving the consistency of the coating weight and the quality of the coated product.
  • the perforation 102 is formed on the first wall 101 of the material chamber 10, and the wall of the cavity pressure regulating block 2 facing the first wall 101 is the second wall 21, and the second wall 21 is in contact with the first wall 101 and surrounds the area where the perforation 102 is located. Therefore, by the contact between the second wall 21 and the first wall 101, and the surrounding of the area where the perforation 102 is located by the second wall 21, it is possible to effectively avoid the formation of a seepage gap between the perforation 102 and the cavity pressure regulating block 2, so as to avoid the problem of seepage when the pressure in the material chamber 10 is too high.
  • the second wall surface 21 fits the first wall surface 101 means that the second wall surface 21 and the first wall surface 101 are not spaced apart, such as the second wall surface 21 and the first wall surface 101 can be in direct contact or indirect contact.
  • the cavity pressure regulating block 2 can be fixed to the die body 1 by screws so that the second wall surface 21 presses the first wall surface 101 to achieve fit; for example, the second wall surface 21 can be connected to the first wall surface 101 by bonding, welding, etc. so that the second wall surface 21 and the first wall surface 101 can be fit, which will not be elaborated here.
  • the shape of the second wall 21 is not limited as long as it can surround the area where the perforation 102 is located, so that the shape and number of the cavity pressure regulating block 2 can be flexibly set according to actual conditions, thereby increasing the scope of application of the cavity pressure regulating block 2 of the embodiment of the present application.
  • the material of the cavity pressure regulating block 2 is not limited, for example, corrosion-resistant rubber, silicone and other expandable or contractible and high-strength materials can be selected. Thus, it can have a better cavity pressure regulating effect, a longer service life, and a better sealing and anti-seepage effect.
  • the cavity pressure regulating block 2 of the embodiment of the present application can effectively eliminate the material seepage gap by setting a second wall surface 21 that fits with the first wall surface 101 and can surround the area where the perforation 102 is located, thereby improving the material seepage problem caused by excessive pressure in the material cavity 10, and further improving the process quality rate.
  • the cavity pressure regulating block 2 is detachably connected to the die body 1, so that different cavity pressure regulating blocks 2 can be replaced according to needs to meet different practical needs. Moreover, since the cavity pressure regulating block 2 can be removed and installed separately, it is also convenient for maintenance. In addition, the cavity pressure regulating block 2 can be installed and used on the same or different die bodies 1, effectively reducing the process cost.
  • the length, width, height, curvature and other parameters of different cavity pressure regulating blocks 2 can be designed to be different, so that different coating products can be selectively matched with different or different combinations of cavity pressure regulating blocks 2, thereby satisfying the regulation effect required by various coating products.
  • the cross section of the cavity pressure regulating block 2 can be a polygon (such as a quadrilateral, triangle, pentagon, etc.), or a sector (such as a semicircle, inferior arc sector, etc.), or an irregular shape, etc.
  • the second wall surface 21 can be set to match the shape of the first wall surface 101, such as a plane structure, a curved surface structure, etc.
  • the shape of the first wall surface 101 can be determined according to the shape of the material cavity 10 and the opening position of the perforation 102, such as the first wall surface 101 can be the wall surface of the die head monomer a (such as the embodiment shown in Figure 5 or Figure 6), and the first wall surface 101 can also be the wall surface of the gasket 13 (such as the embodiment shown in Figure 2), etc.
  • the first wall surface 101 can be a plane structure (such as shown in Figure 2), or a curved surface structure (such as shown in Figures 5 and 6), etc., which will not be repeated here.
  • the cavity pressure regulating block 2 and the die body 1 can be detachably connected in any manner, and there can be multiple ways, such as snap connection or threaded connection, etc.
  • the cavity pressure regulating block 2 and the die body 1 are detachably connected through a threaded connector penetrating the first wall 101 and the second wall 21, wherein the threaded connector can be a screw or a bolt, etc.
  • the threaded connector is not limited in the direction of penetration, for example, it can be penetrated from the outside to the inside of the die body 1, or it can also be penetrated from the inside to the outside of the die body 1, etc.
  • threaded connectors to achieve detachable connection, it is possible to ensure good connection reliability, prevent the cavity pressure regulating block 2 from falling off, ensure the fit between the first wall 101 and the second wall 21, and effectively avoid the problem of material seepage.
  • the threaded connector since the threaded connector is penetrated through the first wall 101 and the second wall 21, it can not only effectively ensure the fit between the first wall 101 and the second wall 21, but also make the other walls of the cavity pressure regulating block 2 except the second wall 21 can be used for expansion and contraction, which is conducive to realizing the adjustment of the pressure of the material chamber 10, and the shape and position of the cavity pressure regulating block 2 can be flexibly set.
  • the connection using threaded connectors facilitates the removal and replacement of the cavity pressure regulating block 2, and the removal and replacement is not likely to cause Damage to structural parts (such as buckles, etc.).
  • a matching hole 23 for passing the threaded connector may be provided on the second wall surface 21 (for example, as shown in FIG. 7 ).
  • the number of the cavity pressure regulating blocks 2 and their distribution positions in the material cavity 10 are not limited.
  • each cavity pressure regulating block 2 there are multiple cavity pressure regulating blocks 2 and they are arranged in sequence along the length direction of the material cavity 10 (for example, the left-right direction shown in FIG. 1 ).
  • the volume of each cavity pressure regulating block 2 is relatively small, and the regulating component 3 can easily adjust the volume change of each cavity pressure regulating block 2, and the adjustment accuracy is high.
  • the cavity pressure regulating blocks 2 at different positions can be adjusted separately so that the pressure at each position of the cavity 10 meets the coating requirements.
  • different cavity pressure regulating blocks 2 can be matched and designed at different positions so that the pressure at each position of the cavity 10 meets the coating requirements.
  • the cavity pressure regulating block 2 has a simple structure, is easy to process, and is easy to install, disassemble and replace, which can reduce costs.
  • the cavity 10 is provided with cavity pressure regulating blocks 2 at both ends along the length direction (e.g., the left and right ends shown in FIG4 ). Therefore, for the scheme where the feeding position and the discharging position are not provided at both ends of the length, the setting position of the cavity pressure regulating block 2 has little effect on the feeding and discharging, which can make the overall pressure change consistency of the cavity 10 better and improve the flow uniformity of the slurry in the cavity 10.
  • the cavity pressure regulating block 2 provided at the length end is easy to install and replace.
  • the die body 1 has a discharge port 16 and a feed port 15 connected to the material cavity 10, and when the cavity pressure regulating block 2 is configured to expand to the limit state, there is still a material passing space 103 between the cavity pressure regulating block 2 and the material cavity 10 that connects the feed port 15 and the discharge port 16.
  • the problem of blockage can be avoided.
  • limit state refers to the maximum expansion state of the cavity pressure regulating block 2 controlled by the regulating component 3, rather than the state in which the cavity pressure regulating block 2 can expand to the maximum.
  • the airbag will easily adhere to the wall of the material cavity after expansion, blocking the flow path, hindering the fluidity of the slurry, and causing the slurry to form a large dead zone in the material cavity, affecting the uniformity of the coating weight.
  • the slurry flow state in the material cavity is a laminar flow state.
  • the cavity pressure regulating block 2 of the present application since it is configured to expand to the limit state, there is still a material transfer space 103 between the cavity pressure regulating block 2 and the material cavity 10 that connects the feed port 15 and the discharge port 16, thereby effectively avoiding the problem of flow path blockage, improving the flow uniformity of the slurry in the material cavity 10, improving the phenomenon of local gel sedimentation, and improving the coating weight consistency.
  • the die body 1 has a discharge port 16 connected to the material cavity 10, and the cavity pressure regulating block 2 is disposed on a side of the material cavity 10 away from the discharge port 16.
  • the cavity pressure regulating block 2 is disposed on the material cavity 10.
  • the central position of the cavity 10 (as shown in FIG2 ).
  • the “central position of the cavity 10” refers to the central position along the discharge direction, not limited to the central cross section, but close to the central cross section.
  • the die body 1 includes a plurality of die monomers a (such as the upper die 11 and the lower die 12 shown in FIG4 ) and a gasket 13 disposed between two adjacent die monomers a
  • the gasket 13 includes a sheet body portion 131 (i.e., a solid area) and a notch portion 132 (i.e., a hollow area)
  • the gasket 13 forms a discharge slit 14 with the corresponding two die monomers a through the notch portion 132
  • the cavity pressure regulating block 2 is disposed corresponding to the sheet body portion 131.
  • the arrangement of the cavity pressure regulating block 2 can avoid the discharge slit 14, thereby reducing the influence of the cavity pressure regulating block 2 on the discharge uniformity and improving the consistency of the coating weight.
  • the present application is not limited to this.
  • the cavity pressure regulating block 2 can also be set corresponding to the notch portion 132; or, a part of the cavity pressure regulating block 2 can be set corresponding to the notch portion 132, and another part of the cavity pressure regulating block 2 can be set corresponding to the sheet portion 131, and so on. It will not be elaborated here.
  • the regulating component 3 includes a pressure regulating member 31 and a flow channel tube 32.
  • the pressure regulating member 31 is disposed on the flow channel tube 32.
  • the flow channel tube 32 is penetrated through the through hole 102 and communicates with the cavity 20.
  • the regulating component 3 has a simple structure and low cost. By providing the flow channel tube 32 penetrated through the through hole 102, it is easy to communicate with the cavity 20 of the cavity pressure regulating block 2, thereby reducing the difficulty of installing the regulating component 3 and further improving the problem of material seepage.
  • the regulating component 3 can be connected to the air pressure regulating system or the hydraulic regulating system, so that the regulating component 3 can transport or extract liquid or gas into the cavity 20 of the cavity pressure regulating block 2 through the flow tube 32, and the pressure regulating component 31 can adjust the internal pressure of the cavity pressure regulating block 2 to control the volume of the cavity pressure regulating block 2.
  • each cavity pressure regulating block 2 is correspondingly connected to at least one flow channel tube 32.
  • each cavity pressure regulating block 2 can obtain a relatively effective and rapid volume regulation effect.
  • the flow tube 32 and the cavity pressure regulating block 2 can be both multiple and arranged in one-to-one correspondence, that is, the flow tube 32 and the cavity pressure regulating block 2 are the same in number and arranged in one-to-one correspondence.
  • the structure is simple and easy to design, and each cavity pressure regulating block 2 can obtain a relatively effective and rapid volume regulation effect.
  • At least one cavity pressure regulating block 2 is simultaneously connected to a plurality of flow channel tubes 32.
  • a more effective and rapid volume regulation effect can be achieved.
  • the regulating component 3 further includes a connecting pipe, which is disposed in the material cavity 10 and connects the cavities 20 of the plurality of cavity pressure regulating blocks 2.
  • a connecting pipe which is disposed in the material cavity 10 and connects the cavities 20 of the plurality of cavity pressure regulating blocks 2.
  • only a number of cavity pressure regulating blocks 2 may be connected to the flow channel tube 32, and the remaining cavity pressure regulating blocks 2 may be connected to the plurality of cavity pressure regulating blocks 2 through the connecting pipe, thereby also realizing the regulation of all cavity pressure regulating blocks 2.
  • the number of pressure regulating parts 31 and flow channel tubes 32 can be reduced, the control can be simplified, and the installation space required for the arrangement of the pressure regulating parts 31 and flow channel tubes 32 can be saved.
  • each cavity pressure regulating block 2 may correspond to one pressure regulating component 31 to achieve separate online regulation of each cavity pressure regulating block 2; or, multiple cavity pressure regulating blocks 2 may correspond to one pressure regulating component 31 at the same time to achieve synchronous online regulation of multiple cavity pressure regulating blocks 2.
  • each cavity pressure regulating block 2 can be adjusted individually, so as to meet the cavity pressure regulating blocks 2 at different positions to adjust the pressure characteristics of the corresponding positions of the material cavity 10 in a targeted manner, and further improve the coating weight consistency.
  • the present application is not limited thereto, for example, in some other embodiments, when the flow tubes 32 and the cavity pressure regulating blocks 2 are both multiple and arranged in one-to-one correspondence, at least two flow tubes 32 may be arranged corresponding to the same pressure regulating member 31. In this way, at least two cavity pressure regulating blocks 2 may be adjusted simultaneously, thereby simplifying control and reducing costs.
  • the cavity pressure regulating block 2 has an opening 22 corresponding to the perforation 102, the opening 22 is connected to the cavity 20, and an anti-backflow element 5 is provided at the opening 22.
  • the end of the flow channel tube 32 is suitable for extending into the cavity 20 through the anti-backflow element 5 and the opening 22.
  • the anti-backflow element 5 is used to close the opening 22 when the flow channel tube 32 is withdrawn from the opening 22. Therefore, by providing the anti-backflow element 5, the fluid can be prevented from overflowing from the opening 22, the pressure of the cavity 20 is ensured to be stable, and the pressure regulating effect on the material cavity 10 is ensured, so that the pressure of the material cavity 10 can be stabilized.
  • the backflow prevention element 5 is designed according to the pressure reverse sealing principle.
  • the backflow prevention element 5 can be a rubber pad.
  • the cavity 20 of the cavity pressure regulating block 2 and the flow tube 32 remain connected.
  • the pressure in the cavity pressure regulating block 2 can be adjusted by controlling the pressure regulating component 31.
  • the internal pressure of the cavity pressure regulating block 2 is relatively large, which will give the rubber pad an outward force, causing the rubber pad to return to a sealed and closed state.
  • the anti-backflow element 5 may also be something other than a rubber pad.
  • it may be a door opening and closing mechanism.
  • the anti-backflow effect of the anti-backflow element 5 is achieved by controlling the door opening and closing mechanism through the control system, which will not be elaborated here.
  • a pressure gauge 33 may be further configured on the flow tube 32.
  • the pressure in the cavity pressure regulating block 2 may be monitored in real time by the pressure gauge 33, thereby facilitating effective regulation of the volume of the cavity pressure regulating block 2.
  • the coating die head 100 may further include: a detection device, the detection device including a pressure sensor 4 for detecting the pressure of the material cavity 10.
  • a detection device including a pressure sensor 4 for detecting the pressure of the material cavity 10.
  • the structure of the detection device is not limited to this, for example, it can also include a temperature sensor, etc., which will not be elaborated here.
  • the number, distribution position and installation method of the pressure sensors 4 can be specifically set according to actual requirements to meet different actual requirements.
  • the pressure sensors 4 can be set at any position of the die body 1, such as the top, bottom, left, right, front and back.
  • At least one pressure sensor 4 is mounted on the cavity pressure regulating block 2 and the sensing head of the pressure sensor 4 is exposed in the material cavity 10.
  • the processing of the die body 1 can be simplified to meet the installation requirements of the pressure sensor 4.
  • the cavity pressure regulating block 2 may be directly disposed on the die body 1 and located close to the cavity pressure regulating block 2 , so that the pressure of the material cavity 10 may be regulated more effectively.
  • the detection device may include a plurality of pressure sensors 4 spaced apart along the length direction of the material chamber 10.
  • pressure detection may be performed at a plurality of positions along the entire length direction of the material chamber 10 to monitor the pressure from a plurality of spatial positions. Controlling the pressure change of the material chamber 10 is helpful to determine the adjustment parameters, ensure the uniform pressure of the material chamber 10, and help improve the consistency of the coating weight.
  • the detection device is electrically connected to the regulating component 3, so that the regulating component 3 can be adjusted accordingly according to the pressure of the material chamber 10 detected by the pressure sensor 4.
  • the pressure can be automatically adjusted, eliminating manual operation, and reliably ensuring the consistency of the coating weight.
  • a corresponding algorithm can be set, and the background can calculate and realize the automatic adjustment of the regulating component 3 according to the detection result of the pressure sensor 4.
  • the material chamber 10 is divided into multiple areas, each area is correspondingly provided with at least one pressure sensor 4, and each area is correspondingly provided with at least one cavity pressure regulating block 2. Therefore, the regulating component 3 can adjust the cavity pressure regulating block 2 of the corresponding area according to the pressure sensor 4 of each area, so as to specifically adjust the volume of each cavity pressure regulating block 2, so as to achieve the effect of controlling the pressure of the material chamber 10 to be stable and uniform.
  • the detection device and the regulating component 3 may also have no electrical connection.
  • the volume of the cavity pressure regulating block 2 can be adjusted by manually operating the regulating component 3 to achieve the effect of controlling the pressure stability of the material cavity 10.
  • the installation position of the cavity pressure regulating block 2 is not limited, and its expansion direction can be the direction away from the second wall surface 21.
  • the cavity pressure regulating block 2 when the cavity pressure regulating block 2 is fixed to the upper die head 11, when the pressure of the cavity 20 increases, the cavity pressure regulating block 2 expands toward the lower die head 12, and when the pressure of the cavity 20 decreases, the cavity pressure regulating block 2 contracts toward the upper die head 11.
  • the cavity pressure regulating block 2 is fixed to the lower die head 12, when the pressure of the cavity 20 increases, the cavity pressure regulating block 2 expands toward the upper die head 11, and when the pressure of the cavity 20 decreases, the cavity pressure regulating block 2 contracts toward the lower die head 12.
  • the cavity pressure regulating block 2 When the cavity pressure regulating block 2 is fixed to the left end of the material cavity 10, when the pressure of the cavity 20 increases, the cavity pressure regulating block 2 expands toward the right end, and when the pressure of the cavity 20 decreases, the cavity pressure regulating block 2 contracts toward the left end.
  • the cavity pressure regulating block 2 is fixed at the right end of the material cavity 10, when the pressure of the cavity 20 increases, the cavity pressure regulating block 2 expands toward the left end, and when the pressure of the cavity 20 decreases, the cavity pressure regulating block 2 contracts toward the right end.
  • the coating die head 100 further includes: a guide member 6, which is disposed in the material cavity 10 and is used to guide the directional expansion of the cavity pressure regulating block 2.
  • a guide member 6, which is disposed in the material cavity 10 and is used to guide the directional expansion of the cavity pressure regulating block 2.
  • the cavity pressure regulating block 2 can be expanded or contracted along a set direction, thereby meeting different design requirements.
  • guiding the expansion direction of the cavity pressure regulating block 2 makes the distribution of the slurry in the material cavity 10 more conducive to the coating process.
  • the cavity pressure regulating block 2 can be used in conjunction with the guide member 6 to allow the cavity pressure regulating block 2 to expand along the length direction of the cavity 10, the up and down direction, or in the direction toward the discharge port 16, etc., which will not be elaborated here.
  • the volume of the cavity pressure regulating block 2 is changed by controlling the pressure in the cavity pressure regulating block 2, thereby changing the effective volume of the material cavity 10, and realizing online adjustment of the spatial size of the material cavity 10, thereby ensuring that the pressure of the material cavity 10 can be adjusted to the target value online, thereby solving the pressure fluctuation problem of the material cavity 10, and then solving the coating weight fluctuation problem.
  • it effectively avoids the problem of waste of resources caused by the need to replace the entire coating die 100 or disassemble and clean the coating die 100 when the pressure of the material cavity 10 does not match, and can effectively reduce the manufacturing cost.
  • the number and type (including size, shape, etc.) of the cavity pressure regulating block 2 can be configured according to the design type of the die body 1, so as to increase the adjustable pressure range of the cavity 10 through a better matching design between the cavity pressure regulating block 2 and the cavity 10.
  • the cavity pressure regulating block 2 can be set at least one location such as the upper side of the cavity 10, the lower side of the cavity 10, the left side of the cavity 10, the right side of the cavity 10, and away from the discharge port 16 to ensure that the cavity 10 has a greater pressure regulating capacity.
  • the cavity pressure regulating block 2 can be disassembled and installed separately, which is convenient and efficient for replacement and maintenance, and can be installed and used on the same or different die bodies 1, greatly reducing the process cost.
  • the pressure of the material chamber 10 can be monitored online, so that according to the pressure fluctuation of the material chamber 10, the regulating component 3 can automatically adjust the pressure of the material chamber 10 to the target chamber pressure.
  • the present application also proposes a coating device using the above-mentioned coating die head, which can effectively improve the consistency of coating weight, reduce manufacturing costs, and improve manufacturing efficiency.

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Abstract

一种涂布模头(100)，包括：模头本体(1)、腔压调节块(2)和调控组件(3)。模头本体内具有料腔(10)，料腔的第一壁面(101)上具有穿孔(102)。腔压调节块设于料腔内，腔压调节块内具有空腔(20)，腔压调节块被配置为随空腔的压力变化而改变体积，腔压调节块的朝向第一壁面的一侧壁面为第二壁面(21)，第二壁面与第一壁面贴合且包围穿孔所在区域。以及一种涂布设备。该涂布模头能够解决料腔压力波动问题。

Description

涂布模头和具有其的涂布设备
相关申请的交叉引用
本申请基于申请号为202222624402.1、申请日为2022-10-08的中国专利申请提出，并要求上述中国专利申请的优先权，上述中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及涂布技术领域，尤其是涉及一种涂布模头和具有其的涂布设备。
背景技术
在电池单体的生产过程中，正极极片和负极极片均使用涂布工艺制成。其中，涂布重量与电池单体的安全联系紧密，是生产电池单体的关键控制点之一。然而，不同型号的电池单体的涂布重量存在较大差异，且不同的电池单体采用的浆料也各不相同，在生产过程中存在不同工况，以上各类情况都会导致涂布模头的料腔压力不同。当料腔压力出现不稳定时，会影响浆料的输送状态，从而影响涂布重量的一致性。常规条件下，当料腔压力出现波动时，需要更换料腔适宜的涂布模头，或清洗料腔内沉降的浆料，或更换浆料来解决此问题，以提升极片的品质。但是，这样会造成物料损耗严重，并且也降低了制程效率，增加了制造成本。
发明内容
本申请实施例提供一种涂布模头和具有其的涂布设备，能够有效解决料腔压力波动问题，改善渗料问题，并降低物料损耗，提高制程效率，降低制造成本。
第一方面，本申请实施例提供一种涂布模头，包括：模头本体，所述模头本体内具有料腔，所述料腔的第一壁面上具有穿孔；腔压调节块，所述腔压调节块设于所述料腔内，所述腔压调节块内具有空腔，所述腔压调节块被配置为随所述空腔的压力变化而改变体积，所述腔压调节块的朝向所述第一壁面的一侧壁面为第二壁面，所述第二壁面与所述第一壁面贴合且包围所述穿孔所在区域；调控组件，所述调控组件适于通过所述穿孔与所述空腔连通，且用于向所述空腔内输送或抽出流体，以通过改变所述空腔的压力来调节所述腔压调节块的体积。在上述技术方案中，可以有效改善涂布重量波动问题，并且可以避免渗料问题，并降低物料损耗，提高制程效率，降低制造成本。
在一些实施例中，所述腔压调节块与所述模头本体可拆卸连接。在上述技术方案中，可以根据需求更换不同的腔压调节块，满足不同的实际需求。
在一些实施例中，所述腔压调节块与所述模头本体通过穿设于所述第一壁面与所述第二壁面的螺纹连接件可拆卸连接。在上述技术方案中，便于腔压调节的拆换，且可以提升腔压调节块的安装稳定性，保证第一壁面与第二壁面良好贴合。
在一些实施例中，所述腔压调节块为多个且沿所述料腔的长度方向依次排列。在上述技术方案中，每个腔压调节块的体积相对较小，调控组件容易调节各腔压调节块的体积变化，调节精度较高。
在一些实施例中，所述腔压调节块为一个且其长度方向与所述料腔的长度方向平行。在上述技术方案中，腔压调节块的结构简单，便于加工，便于安装和拆卸更换，可以降低成本。
在一些实施例中，所述料腔沿长度方向的两端处分别设有所述腔压调节块。在上述技术方案中，腔压调节块的设置位置对过料影响较小，提升浆料在料腔内的流动均匀性。
在一些实施例中，所述模头本体具有与所述料腔连通的出料口和进料口，所述腔压调节块被配置成膨胀到极限状态时，所述腔压调节块与所述料腔之间仍具有连通所述进料口与所述出料口的过料空间。在上述技术方案中，可以改善浆料在料腔内的流动均匀性，改善局部凝胶沉降的现象，提升涂布重量一致性。
在一些实施例中，所述模头本体具有与所述料腔连通的出料口，所述腔压调节块设于所述料腔内的远离所述出料口的一侧，或者，所述腔压调节块设于所述料腔的中央位置。在上述技术方案中，可以降低腔压调节块对出料均匀性的影响，从而提升涂布重量的一致性。
在一些实施例中，所述模头本体包括多个模头单体和设于相邻两个所述模头单体之间的垫片，所述垫片包括片体部和缺口部，所述垫片通过所述缺口部与相应的两个所述模头单体之间形成出料狭缝，所述腔压调节块对应所述片体部设置。在上述技术方案中，腔压调节块的设置可以避让出料狭缝，从而可以降低腔压调节块对出料均匀性的影响，提升涂布重量的一致性。
在一些实施例中，所述调控组件包括调压件和流道管，所述调压件设于所述流道管，所述流道管穿设于所述穿孔且与所述空腔连通。在上述技术方案中，调控组件的结构简单、成本较低，通过设置穿设于穿孔的流道管，便于与腔压调节块的空腔连通，降低调控组件的安装难度，并且可以进一步改善渗料问题。
在一些实施例中，每个所述腔压调节块均对应连接至少一个所述流道管。在上述技术方案中，可以简单且有效地使得每个腔压调节块都获得较为有效且快速的体积调节效果。
在一些实施例中，所述流道管与所述腔压调节块均为多个且一一对应设置。在上述技术方案中，便于连接且降低成本，各腔压调节块都获得较为有效且快速的体积调节效果。
在一些实施例中，所述调压件为多个且与多个所述流道管一一对应设置。在上述技术方案中，可以实现每个所述腔压调节块的单独调节。
在一些实施例中，至少两个所述流道管对应同一个所述调压件设置。在上述技术方案中，可以实现至少两个腔压调节块的同时调节，从而简化控制、降低成本。
在一些实施例中，所述调控组件还包括连通管，所述连通管设于所述料腔内，且连通多个所述腔压调节块的所述空腔。在上述技术方案中，可以减少调压件和流道管的数量，简化控制，节省安装空间。
在一些实施例中，所述腔压调节块具有对应所述穿孔设置的开口，所述开口与所述空腔 连通，所述开口处设有防逆流元件，所述流道管的端部适于通过所述防逆流元件和所述开口伸入所述空腔，所述防逆流元件用于在所述流道管从所述开口抽离时关闭所述开口。在上述技术方案中，通过设置防逆流元件，可以防止流体从开口溢出，保证空腔压力稳定。
在一些实施例中，所述流道管上设有压力表。在上述技术方案中，当流道管插入开口时，可通过压力表实时监控腔压调节块内的压力，从而有利于对腔压调节块的体积的有效调节。
在一些实施例中，所述涂布模头还包括：检测装置，所述检测装置包括用于检测所述料腔的压力的压力传感器上且所述压力传感器的感应头显露于所述料腔。在上述技术方案中，通过设置压力传感器对料腔的压力的检测，有利于调节腔压调节块的体积，以利于对料腔压力的在线调节。
在一些实施例中，至少一个所述压力传感器安装于所述腔压调节块。在上述技术方案中，有利于保证压力传感器的测压准确性。
在一些实施例中，所述检测装置包括沿所述料腔的长度方向间隔设置的多个所述压力传感器。在上述技术方案中，有利于保证料腔的压力均匀，有利于提升涂布重量的一致性。
在一些实施例中，所述检测装置与所述调控组件电连接，以使所述调控组件可根据所述压力传感器检测的料腔压力进行相应调节。在上述技术方案中，可以实现压力自动调节，省去人工操作，便于可靠地保证涂布重量的一致性。
在一些实施例中，所述料腔划分为多个区域，每个所述区域对应设置至少一个所述压力传感器，每个所述区域对应设置至少一个所述腔压调节块。在上述技术方案中，调控组件可以根据各区域的压力传感器调节相应区域的腔压调节块，从而可以针对性地调节各腔压调节块的体积，以达到控制料腔压力稳定且均匀的效果。
在一些实施例中，所述涂布模头还包括：导向件，所述导向件设于所述料腔内且用于引导所述腔压调节块定向膨胀。在上述技术方案中，可以使得腔压调节块定向膨胀，而非无规则膨胀，从而满足不同的设计要求。
在一些实施例中，所述腔压调节块为橡胶件或硅胶件。在上述技术方案中，可以具有较好的腔压调节效果，使用寿命较长，而且可以具有较好的密封、防渗料效果。
第二方面，本申请实施例还提供一种涂布设备，包括上述的涂布模头。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的涂布模头的结构爆炸图；
图2为本申请一些实施例提供的涂布模头的结构剖视图；
图3为本申请一些实施例提供的涂布模头的结构爆炸图；
图4为本申请一些实施例提供的涂布模头的结构爆炸图；
图5为本申请一些实施例提供的涂布模头的结构剖视图；
图6为本申请一些实施例提供的涂布模头的结构剖视图；
图7为本申请一些实施例提供的腔压调节块与调控组件的装配图；
图8为本申请一些实施例提供的腔压调节块与防逆流元件的装配图；
图9为本申请一些实施例提供的涂布模头的结构剖视图。
图标：100-涂布模头；1-模头本体；10-料腔；101-第一壁面；102-穿孔；103-过料空间；11-上模头；12-下模头；a-模头单体；13-垫片；131-片体部；132-缺口部；14-出料狭缝；15-进料口；16-出料口；2-腔压调节块；20-空腔；21-第二壁面；22-开口；23-配合孔；3-调控组件；31-调压件；32-流道管；33-压力表；4-压力传感器；5-防逆流元件；6-导向件。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
涂布是电池单体制造过程中不可或缺的一步。电池单体包括电极组件和电解液，电极组件包括正极极片、负极极片和隔离件。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极集流部和正极极耳，正极集流部涂覆有正极活性物质层，正极极耳未涂覆正极活性物质层。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质层包括正极活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极集流部和负极极耳，负极集流部涂覆有负极活性物质层，负极极耳未涂覆负极活性物质层。负极集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。隔离件的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
在电池单体的生产过程中，正极极片和负极极片均使用涂布工艺制成。涂布工艺是将涂布材料以液体或粉末等形式在织物、纸张、金属箔或板等物体表面上涂盖薄层。示例性地，将正极活性物质、导电剂、粘接剂和溶剂混合并制成糊状粘稠浆料，然后将糊状粘稠浆料均匀地、连续或间断地涂覆在正极集流体基材(例如铝箔)，以制成正极极片。
涂布工艺所使用的涂布模头具有进料口、出料口以及连通进料口和出料口的料腔。外部的浆料以一定的压力经由进料口进入料腔，并经由出料口流出，以涂布在经过出料口的基材上。其中，涂布重量与电池单体的安全联系紧密，是生产电池单体的关键控制点之一。
然而，不同型号的电池单体的涂布重量存在较大差异，且不同的电池单体采用的浆料也各不相同，在生产过程中存在不同工况，以上各类情况都会导致涂布模头的料腔压力不同。例如，当浆料出现团聚、沉降时，会导致料腔压力偏大，甚至可能导致涂布模头出现渗料问题；又例如，当浆料粘度偏低或偏高时，会导致料腔压力波动，涂布重量会受到严重影响；再例如，当涂布速度偏大或偏低时，料腔压力也会受到严重影响，从而影响涂布重量。
总之，当料腔压力出现不稳定时，会影响浆料的输送状态，从而影响涂布重量的一致性。常规条件下，当料腔压力出现波动时，需要更换料腔适宜的涂布模头，或清洗料腔内沉降的浆料，或更换浆料来解决此问题，以提升极片的品质。但是，这样会造成物料损耗严重，并且也降低了制程效率，增加了制造成本。
鉴于此，本申请实施例提供了一种料腔压力可在线调节涂布模头，具体方案为在涂布模头100内增加一个或多个可调节体积大小的腔压调节块2(即腔压调节块2材质可膨胀、可收缩)，通过在线调节腔压调节块2占据料腔10的体积，从而实现在线调节料腔10容纳浆料的有效体积，进而达到调节料腔10压力的效果。从而解决生产过程中涂布模头100的料腔10大小不匹配或料腔10压力波动造成的涂布重量波动问题，避免了频繁更换涂布模头100造成的资源浪费，或增加的制程成本等问题，避免了清洗料腔10内沉降的浆料或更换浆料造成的物料损耗严重等问题。
此外，需要说明的是，本申请实施例提供的涂布模头100，可以、但不限于用于极片的 生产，还可以用于其它需要采用涂布工艺的工件的生产。
下面，参照附图，具体描述根据本申请实施例的涂布模头100。
如图1和图2所示，涂布模头100包括：模头本体1、腔压调节块2和调控组件3。模头本体1内具有料腔10，腔压调节块2设于料腔10内，腔压调节块2内具有空腔20，腔压调节块2被配置为随空腔20的压力变化而改变体积，料腔10的壁面上具有穿孔102，调控组件3适于通过穿孔102与空腔20连通，且用于向空腔20内输送或抽出流体，以通过改变空腔20的压力来调节腔压调节块2的体积。
需要说明的是，模头本体1的具体构成不限。例如在一些实施例中，结合图1-图2，模头本体1可以包括上模头11、下模头12和垫片13，上模头11、下模头12和垫片13之间形成料腔10，垫片13设于上模头11与下模头12之间，以与上模头11、下模头12配合形成出料狭缝14，上模头11与下模头12之间的前侧形成有出料口16，上模头11与下模头12中的至少一个上形成有进料口15(例如结合图3，可以在下模头12的后侧形成进料口15)，进料口15与料腔10连通，料腔10通过出料狭缝14与出料口16连通。
又例如在一些实施例中，模头本体1可以包括至少三个模头，例如自上向下依次排列的第一模头、第二模头、第三模头、第一垫片13和第二垫片13，第一模头、第二模头与第一垫片13之间形成第一料腔10，第一模头与第二模头之间形成第一出料口16，第一模头和第二模头中的至少一个上形成有与第一料腔10连通的第一进料口15，第一垫片13设于第一模头与第二模头之间且与第一模头、第二模头配合形成第一出料狭缝14，第一料腔10通过第一出料狭缝14与第一出料口16连通。第二模头、第三模头与第二垫片13之间形成第二料腔10，第二模头与第三模头之间形成第二出料口16，第二模头和第三模头中的至少一个上形成有与第二料腔10连通的第二进料口15，第二垫片13设于第二模头与第三模头之间且与第二模头、第三模头配合形成第二出料狭缝14，第二料腔10通过第二出料狭缝14与第二出料口16连通。
此外，需要说明的是，模头本体1所限定出的料腔10的数量不限。例如以模头本体1包括上模头11、下模头12和垫片13为例，可以是模头本体1仅形成一个料腔10，又例如还可以是模头本体1形成两个料腔10，其中一个是主料腔10，另一个是副料腔10，主料腔10与进料口15连通，副料腔10与出料口16连通，主料腔10通过连通路径与副料腔10连通，从而可以起到出料缓冲作用。
其中，当模头本体1限定出多个料腔10时，至少一个料腔10内设有腔压调节块2。例如，当模头本体1限定出相互连通的上游料腔10(如主料腔10)和下游料腔10(如副料腔10)时，可以在下游料腔10内设置至少一个腔压调节块2，从而不但可以有效改善涂布重量一致性，而且还可以简化结构、降低成本、提高制程效率。当然，本申请不限于此，也可以在上游料腔10内设置至少一个腔压调节块2，从而也可以在一定程度上改善涂布重量一致性；或者，还可以在每个料腔10内分别设置至少一个腔压调节块2，从而可以更加充分地改善涂布重量一致性。
具体而言，腔压调节块2为可膨胀、可收缩的弹性材料件，通过在腔压调节块2内设置 空腔20，通过调节空腔20压力，可以使得腔压调节块2改变体积，例如，通过增大空腔20压力可以使得腔压调节块2膨胀、体积变大，又例如，通过降低空腔20压力可以使得腔压调节块2收缩、体积减小。
本申请的实施例中，通过调控组件3改变腔压调节块2的体积，具体地，调控组件3可以向腔压调节块2的空腔20内输送流体，从而使得空腔20压力增大，以使腔压调节块2膨胀、体积变大，调控组件3还可以从腔压调节块2的空腔20内抽出流体，从而使得空腔20压力减小，以使腔压调节块2收缩、体积减小。由此，可以通过调控组件3对腔压调节块2的体积实现在线调节。
值得说明的是，调控组件3的具体构成不限，其通过穿孔102向空腔20输送或抽出流体的方式不限，例如调控组件3可以包括插配于穿孔102的管路，以通过管路向空腔20输送或抽出流体；又例如，调控组件3也可以不包括插配于穿孔102的管路，以直接通过穿孔102向空腔20输送或抽出流体，等等。其中，“流体”的具体类型不限，例如可以是气体或者液体等，这里不作限制。
在本申请的实施例中，当腔压调节块2的体积改变时，腔压调节块2占据模头本体1内的料腔10的容积随之改变，从而改变料腔10用于容纳涂布材料的有效容积，进而改变料腔10的压力。可以理解的是，当腔压调节块2的体积变大时，腔压调节块2占据模头本体1内的料腔10的容积变大，从而使得料腔10用于容纳涂布材料的有效容积变小，进而可以增大料腔10的压力；而当腔压调节块2的体积变小时，腔压调节块2占据模头本体1内的料腔10的容积变小，从而使得料腔10用于容纳涂布材料的有效容积变大，进而可以降低料腔10的压力。
由此，通过设置调控组件3对腔压调节块2的体积的在线调节，可以实现对料腔10体积及压力的在线调节，从而可以解决生产过程中涂布模头100的料腔10大小不匹配或料腔10压力波动造成的涂布重量波动问题，避免了频繁更换涂布模头100造成的资源浪费，或增加的制程成本等问题，避免了清洗料腔10内沉降的浆料或更换浆料造成的物料损耗严重等问题，提高了涂布重量的一致性，提升了涂布产品的品质。
如图2所示，穿孔102形成在料腔10的第一壁面101上，腔压调节块2的朝向第一壁面101的一侧壁面为第二壁面21，第二壁面21与第一壁面101贴合且包围穿孔102所在区域。由此，通过第二壁面21与第一壁面101的贴合，以及第二壁面21对穿孔102所在区域的包围，可以有效避免穿孔102与腔压调节块2之间形成渗料间隙，以避免在料腔10压力过大时引发渗料问题。
需要说明的是，“第二壁面21与第一壁面101贴合”指的是第二壁面21与第一壁面101并非是间隔设置的，如第二壁面21与第一壁面101可以是直接接触、或者间接接触。此外，实现“第二壁面21与第一壁面101贴合”的方式不限，例如可以通过螺钉将腔压调节块2固定于模头本体1，以使第二壁面21压紧第一壁面101实现贴合；又例如还可以是通过粘接、焊接等方式将第二壁面21连接于第一壁面101，以使第二壁面21与第一壁面101实现贴合，这里不作赘述。
此外，值得说明的是，第二壁面21的形状不限，只要能够包围穿孔102所在区域即可，从而使得腔压调节块2的形状和数量可以根据实际情况灵活设置，进而增大本申请实施例的腔压调节块2的适用范围。
需要说明的是，腔压调节块2的材质不限，例如可以选择耐腐蚀性橡胶、硅胶等可膨胀或可收缩且高强度材料。由此，可以具有较好的腔压调节效果，使用寿命较长，而且可以具有较好的密封、防渗料效果。
申请人发现，如果在料腔内设置球形气囊，球形气囊与第一壁面无法贴合，会在球形气囊与第一壁面之间形成围绕穿孔设置的渗料间隙，而且渗料间隙会随球形气囊的体积改变而改变，当料腔压力过大时容易从渗料间隙渗料。而本申请实施例的腔压调节块2，通过设置与第一壁面101贴合且能够包围穿孔102所在区域的第二壁面21，可以有效地消除渗料间隙，从而可以改善由于料腔10压力过大导致的渗料问题，进而可以提升制程优率。
在本申请的一些实施例中，腔压调节块2与模头本体1可拆卸连接，由此，可以根据需求更换不同的腔压调节块2，满足不同的实际需求。而且，由于腔压调节块2可单独拆卸和安装，还有利于维护。并且，使得腔压调节块2可在相同或不同的模头本体1上安装使用，有效降低制程成本。
具体而言，不同腔压调节块2的长度、宽度、高度、弧度等参数可以设计为不同的，使不同的涂布产品可选择地搭配不同的、或不同组合的腔压调节块2，从而可以满足各类涂布产品所需的调节效果。例如，腔压调节块2的横截面可以为多边形(如四边形、三角形、五边形等等)、或者扇形(如半圆形、劣弧扇形等等)、或不规则形状等等。
此外，可以理解的是，为了使得第二壁面21与第一壁面101有效贴合，可以将第二壁面21设置为与第一壁面101的形状相匹配，如可以为平面结构、或曲面结构等等。此外，第一壁面101的形状可以根据料腔10的形状、以及穿孔102的开设位置确定，如第一壁面101可以为模头单体a的壁面(例如图5或图6所示实施例)、又如第一壁面101还可以为垫片13的壁面(例如图2所示实施例)等等，此外，第一壁面101可以为平面结构(例如图2所示)、或曲面结构(例如图5和图6所示)等等，这里不作赘述。
需要说明的是，腔压调节块2与模头本体1可拆卸连接的方式不限，可以有多种，例如可以是卡扣连接或螺纹连接等等。例如在一些具体示例中，腔压调节块2与模头本体1通过穿设于第一壁面101与第二壁面21的螺纹连接件可拆卸连接，其中，螺纹连接件可以为螺钉或螺栓等等。值得说明的是，螺纹连接件的穿设方向不限，例如可以从模头本体1外部向内部穿设，或者也可以从模头本体1内部向外部穿设，等等。
由此，通过采用螺纹连接件实现可拆卸连接，从而可以保证连接可靠性较好，腔压调节块2不易脱落，保证第一壁面101与第二壁面21的贴合效果，有效地避免渗料问题。而且，由于螺纹连接件是穿设于第一壁面101和第二壁面21的，不但可以有效保证第一壁面101与第二壁面21的贴合效果，而且使得腔压调节块2的除第二壁面21以外的其他壁面均可以用于膨胀、收缩，有利于实现对料腔10压力的调节，可以使得腔压调节块2的形状和位置灵活设置。此外，采用螺纹连接件的连接，便于腔压调节块2的拆换，且拆换不易导致 结构件(如卡扣等)的损坏。
可以理解的是，为了满足螺纹连接件穿设于第二壁面21的要求，第二壁面21上可以设有用于穿设螺纹连接件的配合孔23(例如结合图7所示)。
需要说明的是，腔压调节块2的数量和在料腔10内的分布位置不限。
例如在本申请的一些实施例中，如图1和图2所示，腔压调节块2为多个且沿料腔10的长度方向(例如图1中所示的左右方向)依次排列。由此，每个腔压调节块2的体积相对较小，调控组件3容易调节各腔压调节块2的体积变化，调节精度较高。
此外，当多个腔压调节块2可以分别单独调节时，可以通过对不同位置的腔压调节块2进行单独调节，使得料腔10各位置的压力均满足涂布要求。或者，当料腔10的各位置的体积不一致时，可以通过在不同位置匹配设计不同的腔压调节块2，使得料腔10各位置的压力均满足涂布要求。
又例如在本申请的一些实施例中，如图3所示，腔压调节块2为一个且其长度方向(例如图3中所示的左右方向)与料腔10的长度方向平行(此处的“平行”当作广义理解，可以为绝对平行或大体平行)。由此，腔压调节块2的结构简单，便于加工，便于安装和拆卸更换，可以降低成本。
再例如在本申请的一些实施例中，如图4所示，料腔10沿长度方向的两端(例如图4中所示的左右两端部)处分别设有腔压调节块2。由此，对于进料位置和出料位置并非设于长度两端部的方案来说，腔压调节块2的设置位置对进料和出料的影响较小，可以使得料腔10整体的压力变化一致性较好，提升浆料在料腔10内的流动均匀性。并且，设于长度端部的腔压调节块2便于安装和拆换。
在本申请的一些实施例中，如图1-图3所示，模头本体1具有与料腔10连通的出料口16和进料口15，腔压调节块2被配置成膨胀到极限状态时，腔压调节块2与料腔10之间仍具有连通进料口15与出料口16的过料空间103。由此，可以避免堵塞的问题。
需要说明的是，“极限状态”是调控组件3控制腔压调节块2的最大膨胀状态，而非腔压调节块2能够膨胀最大的状态。
申请人发现，如果在料腔内设置可膨胀较大的气囊，气囊膨胀后容易与料腔的壁面贴合，堵塞流路，阻碍浆料的流动性，导致浆料在料腔内形成较大的死区，影响涂布重量均匀性。具体而言，料腔内浆料流动状态为层流状态，当气囊阻挡一部分浆料从进料口向出料口流动时，由于局部浆料不流动，导致浆料在料腔内整体上无法均匀流动，出现局部凝胶沉降等现象，使得料腔内压力均匀性较差，影响涂布重量一致性。
而根据本申请的腔压调节块2，由于被配置成膨胀到极限状态时，腔压调节块2与料腔10之间仍具有连通进料口15与出料口16的过料空间103，从而可以有效地避免堵塞流路的问题，提升浆料在料腔10内的流动均匀性，改善局部凝胶沉降的现象，提升涂布重量一致性。
在本申请的一些实施例中，如图5和图6所示，模头本体1具有与料腔10连通的出料口16，腔压调节块2设于料腔10内的远离出料口16的一侧。或者，腔压调节块2设于料 腔10的中央位置(例如图2所示)。由此，可以降低腔压调节块2对出料均匀性的影响，从而提升涂布重量的一致性。需要说明的是，“料腔10的中央位置”指的是沿出料方向的中央位置，不限于中心截面上，靠近中心截面即可。
在本申请的一些实施例中，如图4所示，模头本体1包括多个模头单体a(例如图4中所示的上模头11和下模头12)和设于相邻两个模头单体a之间的垫片13，垫片13包括片体部131(即实体区域)和缺口部132(即镂空区域)，垫片13通过缺口部132与相应的两个模头单体a之间形成出料狭缝14，腔压调节块2对应片体部131设置。由此，腔压调节块2的设置可以避让出料狭缝14，从而可以降低腔压调节块2对出料均匀性的影响，提升涂布重量的一致性。
当然，本申请不限于此，例如在本申请的其他实施例中，腔压调节块2还可以对应缺口部132设置；或者，还可以是一部分腔压调节块2对应缺口部132设置、同时还有一部分腔压调节块2对应片体部131设置等等，这里不作赘述。
在本申请的一些实施例中，如图2和图7所示，调控组件3包括调压件31和流道管32，调压件31设于流道管32，流道管32穿设于穿孔102且与空腔20连通。由此，调控组件3的结构简单、成本较低，通过设置穿设于穿孔102的流道管32，便于与腔压调节块2的空腔20连通，降低调控组件3的安装难度，并且可以进一步改善渗料问题。
例如，调控组件3可以与气压调节系统或液压调节系统相连，从而调控组件3可以通过流道管32向腔压调节块2的空腔20内输送或抽出液体或气体，调压件31可以调节腔压调节块2的内部压力，从而来控制腔压调节块2的体积。
在一些实施例中，每个腔压调节块2均对应连接至少一个流道管32。由此，可以使得每个腔压调节块2都获得较为有效且快速的体积调节效果。
例如在一个具体示例中，如图1所示，流道管32与腔压调节块2可以均为多个且一一对应设置，也就是说，流道管32与腔压调节块2的数量相同且一一对应设置。由此，结构简单，便于设计，可以使得每个腔压调节块2都获得较为有效且快速的体积调节效果。
又例如在一个具体示例中，如图3所示，至少一个腔压调节块2同时连接多个流道管32。由此，对于较大体积的腔压调节块2来说，可以实现更加有效且快速的体积调节效果。
当然，本申请不限于此，例如在本申请的其他实施例中，调控组件3还包括连通管，所述连通管设于所述料腔10内，且连通多个所述腔压调节块2的所述空腔20。此时，可以是只有若干腔压调节块2与流道管32连接，其余的腔压调节块2与上述若干腔压调节块2通过连通管连接，从而也可以实现全部腔压调节块2的调节。由此，可以减少调压件31和流道管32的数量，简化控制，节省调压件31和流道管32布置所需的安装空间。
需要说明的是，调压件31与腔压调节块2的数量可以对应也可以不对应，例如，可以是每个腔压调节块2分别对应一个调压件31，以实现每个腔压调节块2的分别在线调节；或者，还可以是多个腔压调节块2同时对应一个调压件31，以实现多个腔压调节块2的同步在线调节。
在一些实施例中，如图1所示，当流道管32与腔压调节块2均为多个且一一对应设置 时，调压件31为多个且与多个流道管32一一对应设置。由此，可以实现每个腔压调节块2的单独调节，从而满足不同位置的腔压调节块2针对料腔10相应位置的压力特点进行针对性地调节要求，进一步提升涂布重量一致性。
当然，本申请不限于此，例如在另外一些实施例中，当流道管32与腔压调节块2均为多个且一一对应设置时，还可以是至少两个流道管32对应同一个调压件31设置。由此，可以实现至少两个腔压调节块2的同时调节，从而简化控制、降低成本。
在一些实施例中，如图2和图8所示，腔压调节块2具有对应穿孔102设置的开口22，开口22与空腔20连通，开口22处设有防逆流元件5，流道管32的端部适于通过防逆流元件5和开口22伸入空腔20，防逆流元件5用于在流道管32从开口22抽离时关闭开口22。由此，通过设置防逆流元件5，可以防止流体从开口22溢出，保证空腔20压力稳定，保证对料腔10的压力调节效果，使得料腔10的压力可以稳定。
在一些具体示例中，防逆流元件5根据压力逆向封闭原理设计，例如防逆流元件5可以为橡胶垫，当流道管32伸入开口22时，腔压调节块2的空腔20与流道管32保持连通状态，控制调压件31即可调节腔压调节块2内的压力；当流道管32从开口22退出时，腔压调节块2内部压力较大，会给橡胶垫向外的力，致使橡胶垫还原成密封紧闭状态。
当然，本申请不限于此，防逆流元件5还可以并非橡胶垫，例如可以为开关门机构，通过控制系统对开关门机构的控制实现防逆流元件5的防逆流效果，这里不作赘述。
在一些实施例中，如图7和图8所示，流道管32上还可以配置有压力表33。由此，当流道管32插入开口22时，可通过压力表33实时监控腔压调节块2内的压力，从而有利于对腔压调节块2的体积的有效调节。
在本申请的一些实施例中，涂布模头100还可以包括：检测装置，检测装置包括用于检测料腔10的压力的压力传感器4。由此，通过设置压力传感器4对料腔10的压力的检测，有利于调节腔压调节块2的体积，以利于对料腔10压力的在线调节。
值得说明的是，检测装置的构成不限于此，例如还可以包括温度传感器等，这里不作赘述。
需要说明的是，压力传感器4的数量、分布位置以及安装方式，均可以根据实际要求具体设定，从而满足不同的实际要求。例如，模头本体1的上、下、左、右、前、后任意位置均可以设置压力传感器4。
例如在一些实施例中，如图4所示，至少一个压力传感器4安装于腔压调节块2上且压力传感器4的感应头显露于料腔10。由此，可以避免由于腔压调节块2的体积变化撞击压力传感器4的感应头，从而保证压力传感器4的测压准确性。而且，可以简化模头本体1的加工，满足压力传感器4的安装需求。
当然，本申请不限于此，例如，也可以将腔压调节块2直接设置在模头本体1上，且位于靠近腔压调节块2的位置，从而可以较为有效地实现对料腔10压力的调节。
在一些实施例中，检测装置可以包括沿料腔10的长度方向间隔设置的多个压力传感器4。由此，可以对料腔10整个长度方向上的多个位置进行压力检测，以从多个空间位置监 控料腔10的压力变化情况，从而有利于确定调节参数，保证料腔10的压力均匀，有利于提升涂布重量的一致性。
可选地，检测装置与调控组件3电连接，以使调控组件3可根据压力传感器4检测的料腔10压力进行相应调节。由此，可以实现压力自动调节，省去人工操作，便于可靠地保证涂布重量的一致性。例如，可以设置相应的算法，后台通过计算，可以根据压力传感器4的检测结果，实现调控组件3的自动调节。
例如在一些实施例中，料腔10划分为多个区域，每个区域对应设置至少一个压力传感器4，每个区域对应设置至少一个腔压调节块2。由此，调控组件3可以根据各区域的压力传感器4调节相应区域的腔压调节块2，从而可以针对性地调节各腔压调节块2的体积，以达到控制料腔10压力稳定且均匀的效果。
当然，本申请不限于此，检测装置与调控组件3也可以没有电连接关系，当料腔10出现腔压波动时，可以通过人工操作调控组件3调节腔压调节块2的体积，以此达到控制料腔10压力稳定性的效果。
如上文所述，腔压调节块2的安装位置不限，其膨胀方向可以为背离第二壁面21的方向，例如，当将腔压调节块2固定在上模头11时，当空腔20压力增大时，腔压调节块2向下模头12方向膨胀，当空腔20压力减小时，腔压调节块2向上模头11方向收缩。当将腔压调节块2固定在下模头12时，当空腔20压力增大时，腔压调节块2向上模头11方向膨胀，当空腔20压力减小时，腔压调节块2向下模头12方向收缩。当将腔压调节块2固定在料腔10左端时，当空腔20压力增大时，腔压调节块2向右端方向膨胀，当空腔20压力减小时，腔压调节块2向左端方向收缩。当将腔压调节块2固定在料腔10右端时，当空腔20压力增大时，腔压调节块2向左端方向膨胀，当空腔20压力减小时，腔压调节块2向右端方向收缩。
在一些实施例中，如图9所示，涂布模头100还包括：导向件6，导向件6设于料腔10内且用于引导腔压调节块2定向膨胀。由此，通过设置导向件6，可以使得腔压调节块2沿设定方向膨胀或收缩，从而满足不同的设计要求。例如，引导腔压调节块2的膨胀方向使得浆料在料腔10内的分布更有利于涂覆工序。
例如，腔压调节块2可以搭配导向件6使用，以使腔压调节块2沿着料腔10的长度方向、上下方向、或者朝向出料口16的方向进行膨胀等等，这里不作赘述。
综上所述，根据本申请实施例的涂布模头100，通过在料腔10内增加至少一个可收缩或膨胀的腔压调节块2，通过控制腔压调节块2内的压力来改变腔压调节块2的体积，以此改变料腔10的有效体积，实现在线调节料腔10的空间大小，以此保证料腔10的压力可在线调节至目标值，从而解决料腔10的压力波动问题，进而解决涂布重量波动问题。由此，有效地避免了料腔10压力不匹配时，需要更换整个涂布模头100，或拆解清洗涂布模头100等造成的资源浪费问题，可有效降低制造成本。
其中，可根据模头本体1的设计类型来配置腔压调节块2的数量和类型(包括尺寸、形状等)等，以通过腔压调节块2与料腔10的较好匹配设计，增大料腔10的可调压范围。 例如可以将腔压调节块2设置在料腔10上侧、料腔10下侧、料腔10左侧、料腔10右侧、远离出料口16等至少一处，保证料腔10具有较大的调压能力。
而且，腔压调节块2可单独拆卸和安装，有利于更换和维护，简便且高效，并且，可在相同或不同的模头本体1上安装使用，大大降低制程成本。
此外，通过设置压力传感器4，可在线监控料腔10压力，以根据料腔10的压力波动情况，使得调控组件3可以自动将料腔10的压力调节至目标腔压。
另外，本申请还提出了一种采用上述涂布模头的涂布设备，可以有效地提高涂布重量一致性，降低了制成成本，提高了制成效率。
可以理解的是，根据本申请实施例的涂布设备的其他构成涂布棍等以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互结合。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (25)

  1. 一种涂布模头，其中，包括：
    模头本体，所述模头本体内具有料腔，所述料腔的第一壁面上具有穿孔；
    腔压调节块，所述腔压调节块设于所述料腔内，所述腔压调节块内具有空腔，所述腔压调节块被配置为随所述空腔的压力变化而改变体积，所述腔压调节块的朝向所述第一壁面的一侧壁面为第二壁面，所述第二壁面与所述第一壁面贴合且包围所述穿孔所在区域；
    调控组件，所述调控组件适于通过所述穿孔与所述空腔连通，且用于向所述空腔内输送或抽出流体，以通过改变所述空腔的压力来调节所述腔压调节块的体积。
  2. 根据权利要求1所述的涂布模头，其中，所述腔压调节块与所述模头本体可拆卸连接。
  3. 根据权利要求2所述的涂布模头，其中，所述腔压调节块与所述模头本体通过穿设于所述第一壁面与所述第二壁面的螺纹连接件可拆卸连接。
  4. 根据权利要求1-3中任一项所述的涂布模头，其中，所述腔压调节块为多个且沿所述料腔的长度方向依次排列。
  5. 根据权利要求1-3中任一项所述的涂布模头，其中，所述腔压调节块为一个且其长度方向与所述料腔的长度方向平行。
  6. 根据权利要求1-3中任一项所述的涂布模头，其中，所述料腔沿长度方向的两端处分别设有所述腔压调节块。
  7. 根据权利要求1-6中任一项所述的涂布模头，其中，所述模头本体具有与所述料腔连通的出料口和进料口，所述腔压调节块被配置成膨胀到极限状态时，所述腔压调节块与所述料腔之间仍具有连通所述进料口与所述出料口的过料空间。
  8. 根据权利要求1-7中任一项所述的涂布模头，其中，所述模头本体具有与所述料腔连通的出料口，所述腔压调节块设于所述料腔内的远离所述出料口的一侧，或者，所述腔压调节块设于所述料腔的中央位置。
  9. 根据权利要求1-8中任一项所述的涂布模头，其中，所述模头本体包括多个模头单体和设于相邻两个所述模头单体之间的垫片，所述垫片包括片体部和缺口部，所述垫片通过所述缺口部与相应的两个所述模头单体之间形成出料狭缝，所述腔压调节块对应所述片体部设置。
  10. 根据权利要求1-9中任一项所述的涂布模头，其中，所述调控组件包括调压件和流道管，所述调压件设于所述流道管，所述流道管穿设于所述穿孔且与所述空腔连通。
  11. 根据权利要求10所述的涂布模头，其中，每个所述腔压调节块均对应连接至少一个所述流道管。
  12. 根据权利要求11所述的涂布模头，其中，所述流道管与所述腔压调节块均为多个且一一对应设置。
  13. 根据权利要求12所述的涂布模头，其中，所述调压件为多个且与多个所述流道管一一对应设置。
  14. 根据权利要求12所述的涂布模头，其中，至少两个所述流道管对应同一个所述调压件设置。
  15. 根据权利要求10所述的涂布模头，其中，所述调控组件还包括连通管，所述连通管设于所述料腔内，且连通多个所述腔压调节块的所述空腔。
  16. 根据权利要求10-15中任一项所述的涂布模头，其中，所述腔压调节块具有对应所述穿孔设置的开口，所述开口与所述空腔连通，所述开口处设有防逆流元件，所述流道管的端部适于通过所述防逆流元件和所述开口伸入所述空腔，所述防逆流元件用于在所述流道管从所述开口抽离时关闭所述开口。
  17. 根据权利要求10-16中任一项所述的涂布模头，其中，所述流道管上设有压力表。
  18. 根据权利要求1-17中任一项所述的涂布模头，其中，还包括：
    检测装置，所述检测装置包括用于检测所述料腔的压力的压力传感器。
  19. 根据权利要求18所述的涂布模头，其中，至少一个所述压力传感器安装于所述腔压调节块上且所述压力传感器的感应头显露于所述料腔。
  20. 根据权利要求18或19所述的涂布模头，其中，所述检测装置包括沿所述料腔的长度方向间隔设置的多个所述压力传感器。
  21. 根据权利要求18-20中任一项所述的涂布模头，其中，所述检测装置与所述调控组件电连接，以使所述调控组件可根据所述压力传感器检测的料腔压力进行相应调节。
  22. 根据权利要求21所述的涂布模头，其中，所述料腔划分为多个区域，每个所述区域对应设置至少一个所述压力传感器，每个所述区域对应设置至少一个所述腔压调节块。
  23. 根据权利要求1-22中任一项所述的涂布模头，其中，还包括：
    导向件，所述导向件设于所述料腔内且用于引导所述腔压调节块定向膨胀。
  24. 根据权利要求1-23中任一项所述的涂布模头，其中，所述腔压调节块为橡胶件或硅胶件。
  25. 一种涂布设备，其中，包括根据权利要求1-24中任一项所述的涂布模头。
PCT/CN2023/122589 2022-10-08 2023-09-28 涂布模头和具有其的涂布设备 WO2024074117A1 (zh)

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CN218167601U (zh) * 2022-10-08 2022-12-30 宁德时代新能源科技股份有限公司 涂布模头和具有其的涂布设备
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120027942A1 (en) * 2010-07-29 2012-02-02 Felipe Miguel Joos Systems and methods for dispensing a fluid
CN209697340U (zh) * 2019-01-15 2019-11-29 肇庆遨优动力电池有限公司 一种可调节腔压涂布挤压模头
CN111760757A (zh) * 2020-08-05 2020-10-13 惠州市赢合科技有限公司 腔压可调的涂布模头
CN111774250A (zh) * 2020-08-03 2020-10-16 惠州市赢合科技有限公司 一种腔压可调的涂布模头
CN213102968U (zh) * 2020-07-27 2021-05-04 惠州市赢合科技有限公司 一种可竖直方向调节腔压的涂布模头
CN216880143U (zh) * 2022-01-25 2022-07-05 深圳市曼恩斯特科技股份有限公司 涂布模头及涂布装置
CN218167601U (zh) * 2022-10-08 2022-12-30 宁德时代新能源科技股份有限公司 涂布模头和具有其的涂布设备

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120027942A1 (en) * 2010-07-29 2012-02-02 Felipe Miguel Joos Systems and methods for dispensing a fluid
CN209697340U (zh) * 2019-01-15 2019-11-29 肇庆遨优动力电池有限公司 一种可调节腔压涂布挤压模头
CN213102968U (zh) * 2020-07-27 2021-05-04 惠州市赢合科技有限公司 一种可竖直方向调节腔压的涂布模头
CN111774250A (zh) * 2020-08-03 2020-10-16 惠州市赢合科技有限公司 一种腔压可调的涂布模头
CN111760757A (zh) * 2020-08-05 2020-10-13 惠州市赢合科技有限公司 腔压可调的涂布模头
CN216880143U (zh) * 2022-01-25 2022-07-05 深圳市曼恩斯特科技股份有限公司 涂布模头及涂布装置
CN218167601U (zh) * 2022-10-08 2022-12-30 宁德时代新能源科技股份有限公司 涂布模头和具有其的涂布设备

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