WO2024073928A1 - 涂布模头及涂布装置 - Google Patents

涂布模头及涂布装置 Download PDF

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Publication number
WO2024073928A1
WO2024073928A1 PCT/CN2022/135568 CN2022135568W WO2024073928A1 WO 2024073928 A1 WO2024073928 A1 WO 2024073928A1 CN 2022135568 W CN2022135568 W CN 2022135568W WO 2024073928 A1 WO2024073928 A1 WO 2024073928A1
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WIPO (PCT)
Prior art keywords
lip
die
coating
module
modules
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PCT/CN2022/135568
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English (en)
French (fr)
Inventor
刘旭永
刘明丽
潘崇浩
商红武
郑建峰
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2024073928A1 publication Critical patent/WO2024073928A1/zh

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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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 technical field of battery pole piece processing equipment, and in particular to a coating die head and a coating device.
  • Coating is an essential process in the production of lithium-ion batteries and is also a key process that directly affects battery safety, capacity, life and other performance. Coating is to evenly, continuously or intermittently coat the prepared paste-like viscous slurry on the substrate (aluminum foil or copper foil). During the coating process, the thickness consistency of each coating position must be ensured and the coating thickness must be controlled within the tolerance range required by the process.
  • the coating die head When coating the substrate with slurry, the coating die head needs to be replaced as a whole when producing pole pieces of different widths, which results in high manufacturing costs.
  • the present application provides a coating die and a coating device, which can avoid the problem of having to replace the coating die as a whole when producing pole pieces of different widths.
  • the present application provides a coating die head, the coating die head comprising a first die head and a second die head arranged opposite to each other, wherein the first die head comprises a first die head body and a plurality of first lip modules, and the plurality of first lip modules are sequentially spliced along a first direction.
  • Each first lip module is detachably connected to the first die head body, each first lip module is provided with a first groove, and the first grooves of the plurality of first lip modules are spliced to form a main cavity for storing slurry, and the first direction is the length direction of the main cavity.
  • the first lip module when producing pole pieces of different widths, can be replaced or reassembled, and the length of the main cavity can be changed to make the coating die head adapt to the production of pole pieces of different widths. There is no need to replace the coating die head as a whole, which reduces the manufacturing cost.
  • the first die includes a first die body and a plurality of first lip modules, and the plurality of first lip modules are spliced in sequence along a first direction.
  • the first die body is provided with a first slot extending in the first direction, and each first lip module has a first protrusion, and the first protrusion is plugged into the first slot.
  • the first lip module When replacing the first lip module, the first lip module can be conveniently assembled into the first slot of the first die body under the action of the first protrusion; when reassembling the first lip module, the first lip module that does not need to be removed can be slid along the first slot under the action of the first protrusion to realize the sequential splicing of the plurality of first lip modules, thereby reducing the difficulty of assembling the reassembled first lip module.
  • a first slot extending along the first direction is provided on the first die body, and each first lip module has a first protrusion, which is plugged into the first slot.
  • a plurality of first positioning holes are provided in the first slot, and the first die includes a plurality of first screw members corresponding to the first positioning holes one by one, and the first lip module is fixed to the first die body by the first screw member passing through the first positioning hole. The first screw member improves the connection stability between the first lip module and the first die body.
  • the first die body includes a base and a boss, the boss protrudes from a first surface of the base, the first lip module is disposed on the first surface, and the first slot is disposed on the boss.
  • the first die body includes a base and a boss, the boss protrudes from the first surface of the base, the first lip module is arranged on the first surface, and the first slot is arranged on the boss.
  • a plurality of second positioning holes are arranged on the first surface, and the first die also includes a plurality of second screw members corresponding to the second positioning holes one by one, and the first lip module is fixed to the base by the second screw member passing through the second positioning hole. The second screw member improves the connection stability between the first lip module and the first die body.
  • the first lip module is provided with a second groove, and the second grooves of a plurality of first lip modules are spliced to form a sub-cavity for caching slurry.
  • the sub-cavity can cache the slurry flowing out of the main cavity, thereby improving the uniformity of the coating die discharge.
  • a first seal is disposed between two adjacent first lip modules, and the first seal improves the sealing performance of the first die head and reduces the risk of slurry seepage in the first die head.
  • the first die includes a first die body and a plurality of first lip modules, the plurality of first lip modules are sequentially spliced along a first direction, and each first lip module is detachably connected to the first die body, and the second die includes a second die body and a plurality of second lip modules, the plurality of second lip modules are sequentially spliced along a first direction, and each second lip module is detachably connected to the second die body, and the gap between the second lip module and the first lip module forms the lip of the coating die.
  • the first lip module or the second lip module can be replaced or repaired separately, without replacing the coating die as a whole, thereby reducing the manufacturing cost.
  • the second lip module and the first lip module are arranged in one-to-one correspondence. Such a design simplifies the structural design of the first lip module and the second lip module and reduces the manufacturing cost.
  • a first coating is provided on a side of the first lip module facing the second lip module, and a second coating is provided on a side of the second lip module facing the first lip module.
  • the second die body is provided with a second slot extending along the first direction, and the second lip module has a second protrusion, which is plugged into the second slot.
  • the second lip module can be conveniently assembled into the second slot of the second die body under the action of the second protrusion.
  • the second die body is provided with a second slot extending along the first direction
  • the second lip module has a second protrusion
  • the second protrusion is plugged into the second slot.
  • the second protrusion is provided with a plurality of third positioning holes
  • the second die includes a plurality of third screw members corresponding to the third positioning holes one by one
  • the second lip module is fixed to the second die body by the third screw member passing through the third positioning hole.
  • the third screw member improves the connection stability between the second lip module and the second die body.
  • a second seal is provided between two adjacent second lip modules, so as to improve the sealing performance of the second die head and reduce the risk of slurry seepage in the second die head.
  • the present application provides a coating device, which includes the coating die head in the above embodiment.
  • FIG1 is an isometric view of a coating die head according to some embodiments of the present application.
  • FIG2 is an isometric view of a first die head according to some embodiments of the present application.
  • FIG3 is an isometric view of a first die body according to some embodiments of the present application.
  • FIG4 is a partial enlarged view of point A in FIG3 of the present application.
  • FIG5 is an axonometric view of a first lip module according to some embodiments of the present application.
  • FIG6 is an axonometric view of a first lip module according to some other embodiments of the present application.
  • FIG. 7 is a side view of a coating die according to some embodiments of the present application.
  • FIG8 is a partial enlarged view of point B in FIG7 of the present application.
  • FIG9 is an isometric view of a second die head according to some embodiments of the present application.
  • FIG10 is an isometric view of a second die body according to some embodiments of the present application.
  • FIG11 is an axonometric view of a second lip module according to some embodiments of the present application.
  • FIG. 12 is a partial enlarged view of point C in FIG. 9 of the present application.
  • multiple refers to more than two (including two).
  • multiple groups refers to more than two groups (including two groups), and “multiple pieces” refers to more than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.
  • Coating is the process of applying a thin layer of coating material in liquid or powder form on the surface of objects such as fabrics, paper, metal foil or plates. Coating is an indispensable step in the manufacturing process of battery cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator.
  • the battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work.
  • the positive electrode sheet includes a positive electrode collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on part of the surface of the positive electrode collector.
  • the positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode ear.
  • the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide.
  • the negative electrode sheet includes a negative electrode collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on part of the surface of the negative electrode collector.
  • the negative electrode collector not coated with the negative electrode active material layer serves as the negative electrode ear.
  • the material of the negative electrode collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that a large current is passed without melting, the number of positive electrodes is multiple and stacked together, and the number of negative electrodes is multiple and stacked together.
  • the coating process is used to coat the positive active material on the positive current collector, and the negative active material on the negative current collector. That is, the prepared paste-like viscous slurry (positive active material or negative active material) is evenly, continuously or intermittently coated on the substrate (positive current collector or negative current collector). During coating, the thickness consistency of each coating position must be ensured, and the coating thickness must be controlled within the tolerance range required by the process.
  • the coating device used in the coating process includes a coating die, a feed pipe and a slurry tank.
  • the die body generally includes an upper die, a lower die, a feed port and a material cavity.
  • the material cavity is generally arranged on the lower die, and the gap between the upper die and the lower die forms a lip.
  • the length of the cavity In order to ensure that the thickness of each coating position has good consistency during coating, the length of the cavity generally needs to match the width of the electrode. For example, if the width of the electrode is much smaller than the length of the cavity, the slurry at the end of the cavity will have abnormal problems such as sedimentation, gelation, and agglomeration due to poor fluidity. The occurrence of the above abnormal problems will cause the pressure of the cavity to fluctuate and cause the thickness consistency of the coating position to deteriorate.
  • the coating die head needs to be replaced as a whole so that the replaced coating die head matches the width of the pole piece, but replacing the die head as a whole will dramatically increase the manufacturing cost.
  • the inventors have designed a coating die head after in-depth research, modularizing the lower die head so that the length of the material cavity set on the lower die head can be changed to adapt to pole pieces of different widths.
  • the lower die head is designed as a plurality of unit modules, and the unit module has a groove that can accommodate the slurry. All unit modules are assembled to form a complete lower die head, and all grooves are spliced to form a material cavity for storing the slurry.
  • the length of the material cavity is changed by replacing the unit modules or recombining the unit modules to make the coating die head adapt to the production of pole pieces of different widths, without replacing the coating die head as a whole, thereby reducing manufacturing costs.
  • the coating die head disclosed in the embodiment of the present application can be used, but is not limited to, for coating slurry on a positive electrode current collector or a negative electrode current collector.
  • the present application provides a coating die head, the coating die head comprising a first die head 1 and a second die head 2 arranged opposite to each other, wherein the first die head 1 comprises a first die head body 11 and a plurality of first lip modules 12, and the plurality of first lip modules 12 are sequentially spliced along a first direction X.
  • Each first lip module 12 is detachably connected to the first die head body 11, each first lip module 12 is provided with a first groove 121, and the first grooves 121 of the plurality of first lip modules 12 are spliced to form a main cavity for storing slurry, and the first direction X is the length direction of the main cavity.
  • the first die head 1 can be an upper die head/lower die head, which means that the main cavity can be arranged on the upper die head or on the lower die head.
  • first die head 1 and the second die head 2 are detachably connected.
  • first die head 1 and the second die head 2 are connected by a plurality of screws.
  • a gap needs to be left on the opposite sides of the first die head 1 and the second die head 2 to form a lip 3 for the slurry to flow out of the coating die head.
  • a coating layer for enhancing the wear resistance may be added to the first die 1 and the second die 2 on the side facing the lip 3 .
  • the feed port for the slurry to enter the main cavity can be set on the bottom surface of the coating die head, or it can be set on the side of the coating die head.
  • the feed port of the coating die head can be a plurality of channels that sequentially pass through the first die body 11 and the first lip module 12.
  • the channel can be formed by docking a first hole set on the first die body 11 with a second hole set on the first lip module 12 that corresponds to the first hole.
  • the channel can be multiple or one. When there are multiple channels, the channel that is not connected to the feed pipe needs to be sealed by a rubber plug/silicone plug to ensure the sealing of the main cavity.
  • the first groove 121 may be open at one end and closed at the other end.
  • the closed end of the first groove 121 forms a blocking portion, which is used to limit the flow of slurry.
  • the first groove 121 may also be open at both ends.
  • the two ends of the main cavity need to be provided with plugging pieces or have plugging parts to form a holding space for storing slurry.
  • the first groove 121 of the first lip module 12 at the two ends of the first die head 1 has a plugging part at one end away from the center of the main cavity, and the first groove 121 of the first lip module 12 in the middle of the first die head 1 is open at both ends.
  • the first grooves 121 of all the first lip modules 12 are open at both ends.
  • plugging pieces need to be added at both ends of the first die head 1.
  • the plugging pieces can close the openings of the first grooves 121.
  • the plugging piece can be a plate body, which is mounted on the side of the first lip module 12 at both ends of the first die head 1 by screws.
  • the processing accuracy of the end face of the first lip module 12 can be reduced. At this time, when all the first lip modules 12 are spliced, assembly gaps are likely to appear between adjacent first lip modules 12. In order to improve the sealing of the first die head 1 formed by splicing, a seal can be added between adjacent first lip modules 12.
  • the lengths of the first grooves 121 of different first lip modules 12 may be the same or different, and the installation positions may be random.
  • the lengths of the first grooves 121 of all first lip modules 12 are the same, which is D.
  • the length of the main cavity is an integer multiple of D.
  • D can be designed as a common divisor of multiple coating widths.
  • a plurality of first lip modules 12 with sealing portions having first grooves 121 of different lengths may be provided, and the length of the main cavity may be adjusted by only replacing the first lip modules 12 with sealing portions.
  • the first lip module 12 and the first die body 11 may be connected via a mortise and tenon structure, or may be connected via fasteners such as screws, bolts and nuts.
  • the first lip module 12 may be additionally provided with a second groove 123 for buffering the slurry.
  • the first lip module 12 can be replaced or reassembled, and the length of the main cavity can be changed to make the coating die head adapt to the production of pole pieces of different widths. There is no need to replace the coating die head as a whole, which reduces the manufacturing cost.
  • the first die 1 includes a first die body 11 and a plurality of first lip modules 12, and the plurality of first lip modules 12 are sequentially spliced along a first direction X.
  • the first die body 11 is provided with a first slot 1121 extending along the first direction X, and each first lip module 12 has a first protrusion 122, and the first protrusion 122 is plugged into the first slot 1121.
  • the cross-sectional shape of the first bump 122 may be trapezoidal, square, rectangular, semicircular, etc.
  • the first protrusion 122 can be integrally formed when the first lip module 12 is processed, or can be separately processed and then welded to the first lip module 12 .
  • the first lip module 12 When replacing the first lip module 12, the first lip module 12 can be conveniently assembled into the first slot 1121 of the first die body 11 under the action of the first protrusion 122; when reassembling the first lip module 12, the first lip module 12 can be slid along the first slot 1121 under the action of the first protrusion 122 without being removed to achieve sequential splicing of multiple first lip modules 12, thereby reducing the difficulty of assembling the reassembled first lip module 12.
  • a first slot 1121 extending along the first direction X is provided on the first die body 11, and each first lip module 12 has a first protrusion 122, and the first protrusion 122 is plugged into the first slot 1121.
  • a plurality of first positioning holes 1122 are provided in the first slot 1121, and the first die 1 includes a plurality of first screw members 13 corresponding to the first positioning holes 1122 one by one, and the first lip module 12 is fixed to the first die body 11 by the first screw member 13 passing through the first positioning holes 1122.
  • the first positioning hole 1122 can be a light hole, a screw hole, a countersunk hole, etc.
  • the first threaded member 13 may be a screw/screw rod.
  • the first threaded member 13 is a screw rod.
  • the first lip module 12 may be fixed to the first die body 11 through a nut matched with the screw rod.
  • the first die head 1 may further include a gasket matched with the first threaded member 13 .
  • a first threaded hole 1221 cooperating with the first threaded member 13 may be processed on the first protrusion 122 .
  • the first threaded member 13 improves the connection stability between the first lip module 12 and the first die body 11 .
  • the first die body 11 includes a base 111 and a boss 112, the boss 112 protrudes from the first surface 1111 of the base 111, the first lip module 12 is arranged on the first surface 1111, and the first slot 1121 is arranged on the boss 112.
  • the base 111 and the boss 112 may be integrally formed, or the boss 112 and the base 111 may be separately processed and then the boss 112 may be formed on the first surface 1111 of the base 111 by welding.
  • the boss 112 may be disposed at a middle portion/edge of the first surface 1111 of the base 111 .
  • the first die body 11 includes a base 111 and a boss 112.
  • the boss 112 protrudes from the first surface 1111 of the base 111.
  • the first lip module 12 is arranged on the first surface 1111, and the first slot 1121 is arranged on the boss 112.
  • a plurality of second positioning holes 1112 are arranged on the first surface 1111.
  • the first die 1 also includes a plurality of second screw members 14 corresponding to the second positioning holes 1112 one by one.
  • the first lip module 12 is fixed to the base 111 by the second screw members 14 passing through the second positioning holes 1112.
  • the second positioning hole 1112 can be a light hole, a screw hole, a countersunk hole, etc.
  • the second threaded member 14 may be a screw/screw rod.
  • the second threaded member 14 is a screw rod.
  • the first lip module 12 may be fixed to the first die body 11 through a nut matched with the screw rod.
  • the first die head 1 may further include a gasket matched with the second threaded member 14 .
  • the second threaded member 14 improves the connection stability between the first lip module 12 and the first die body 11 .
  • the first lip module 12 is provided with a second groove 123 , and the second grooves 123 of a plurality of first lip modules 12 are spliced to form a sub-cavity for caching slurry.
  • adjacent second grooves 123 are arranged along the first direction X but with a distance therebetween.
  • the auxiliary cavity can buffer the slurry flowing out of the main cavity, balance the pressure of the main cavity, and improve the uniformity of the discharge of the coating die.
  • a first seal is disposed between two adjacent first lip modules 12 .
  • the first sealing member may be a silicone sealing pad, a rubber sealing pad, or the like.
  • the first sealing member improves the sealing performance of the first die head 1 and reduces the risk of slurry seepage in the first die head 1 .
  • the first die 1 includes a first die body 11 and a plurality of first lip modules 12, and the plurality of first lip modules 12 are spliced in sequence along the first direction X, and each first lip module 12 is detachably connected to the first die body 11.
  • the second die 2 includes a second die body 21 and a plurality of second lip modules 22, and the plurality of second lip modules 22 are spliced in sequence along the first direction X, and each second lip module 22 is detachably connected to the second die body 21.
  • the gap between the second lip module 22 and the first lip module 12 forms the lip 3 of the coating die.
  • the lengths of the plurality of second lip modules 22 may be the same or different.
  • the second die 2 may include a second lip module 22 , which is detachably connected to the second die body 21 , and the length of the second lip module 22 is substantially the same as the length of all the first lip modules 12 after being spliced together.
  • the second lip module 22 and the first lip module 12 are arranged in a one-to-one correspondence and can be replaced synchronously.
  • the processing accuracy of the end face of the second lip module 22 can be reduced. At this time, when all the second lip modules 22 are spliced, assembly gaps are likely to appear between adjacent second lip modules 22. In order to improve the sealing of the second die head 2 formed by splicing, a seal can be added between adjacent second lip modules 22.
  • the second lip module 22 and the second die body 21 may be connected via a mortise and tenon structure, or may be connected via fasteners such as screws, bolts and nuts.
  • the first lip module 12 or the second lip module 22 can be replaced or repaired separately without replacing the entire coating die, thereby reducing manufacturing costs.
  • the second lip modules 22 and the first lip modules 12 are arranged in a one-to-one correspondence.
  • the second lip module 22 and the first lip module 12 are arranged in a one-to-one correspondence, which means that the positions and lengths of the first lip module 12 and the second lip module 22 are substantially the same.
  • Such a design simplifies the structural design of the first lip module 12 and the second lip module 22 and reduces the manufacturing cost.
  • a first coating layer is disposed on a side of the first lip module 12 facing the second lip module 22
  • a second coating layer is disposed on a side of the second lip module 22 facing the first lip module 12 .
  • the first coating layer and the second coating layer may be coating layers for enhancing hardness and mechanical strength.
  • the types of coating layers for enhancing hardness and mechanical strength are well known to those skilled in the art and will not be described in detail herein.
  • Such a design improves the wear resistance of the first lip module 12 and the second lip module 22 , and increases the service life of the first lip module 12 and the second lip module 22 .
  • the second die body 21 is provided with a second slot 211 extending along the first direction X, and the second lip module 22 has a second protrusion 221 , which is plugged into the second slot 211 .
  • the cross-sectional shape of the second bump 221 may be trapezoidal, square, rectangular, semicircular, or the like.
  • the second protrusion 221 can be integrally formed when the second lip module 22 is processed, or can be separately processed and then welded to the first lip module 12 .
  • the second lip module 22 When the second lip module 22 is replaced, the second lip module 22 can be conveniently assembled into the second slot 211 of the second die body 21 under the action of the second protrusion 221 .
  • the second die body 21 is provided with a second slot 211 extending along the first direction X, and the second lip module 22 has a second protrusion 221, which is plugged into the second slot 211.
  • the second protrusion 221 is provided with a plurality of third positioning holes 2211, and the second die 2 includes a plurality of third screw members 23 corresponding to the third positioning holes 2211 one by one.
  • the second lip module 22 is fixed to the second die body 21 by the third screw member 23 passing through the third positioning holes 2211.
  • the third positioning hole 2211 can be a light hole, a screw hole, a countersunk hole, etc.
  • the third threaded member 23 may be a screw/screw rod.
  • the third threaded member 23 is a screw rod.
  • the second lip module 22 may be fixed to the second die body 21 through a nut matched with the screw rod.
  • the second die head 2 may further include a gasket matched with the third threaded member 23 .
  • a second threaded hole that cooperates with the third threaded member 23 may be processed on the side wall of the second insertion slot 211 .
  • the third screw member 23 improves the connection stability between the second lip module 22 and the second die body 21 .
  • a second sealing member is disposed between two adjacent second lip modules 22 .
  • the second sealing member can be a silicone sealing pad, a rubber sealing pad, etc.
  • the second sealing member improves the sealing performance of the second die head 2 and reduces the risk of slurry seepage in the second die head 2 .
  • the present application also provides a coating device, comprising the coating die head in any of the above schemes.
  • the present application provides a coating die head, the coating die head comprises a first die head 1 and a second die head 2 arranged opposite to each other, the first die head 1 comprises a first die head body 11 and four first lip modules 12, and the four first lip modules 12 are sequentially spliced along a first direction X.
  • Each first lip module 12 is detachably connected to the first die head body 11, each first lip module 12 is provided with a first groove 121, and the first grooves 121 of the four first lip modules 12 are spliced to form a main cavity for storing slurry, and the first direction X is the length direction of the main cavity.
  • the first die body 11 includes a base 111 and a boss 112, the boss 112 protrudes from a first surface 1111 of the base 111, the first lip module 12 is arranged on the first surface 1111, and a first slot 1121 extending along the first direction X is arranged on the boss 112, each first lip module 12 has a first protrusion 122, and the first protrusion 122 is inserted into the first slot 1121.
  • a plurality of first positioning holes 1122 are provided in the first slot 1121, and the first die head 1 includes a plurality of first screw members 13 corresponding to the first positioning holes 1122.
  • a plurality of second positioning holes 1112 are provided on the first surface 1111, and the first die head 1 also includes a plurality of second screw members 14 corresponding to the second positioning holes 1112.
  • the first lip module 12 is fixed to the first die head body 11 by the first screw members 13 passing through the first positioning holes 1122 and the second screw members 14 passing through the second positioning holes 1112.
  • the first lip modules 12 can be replaced or reassembled to make the length of the main cavity match the width of the pole piece. Please refer to Figure 2.
  • a pole piece with a smaller width needs to be produced, one of the first lip modules 12 in the middle of the first die head 1 can be removed, and the remaining first lip modules 12 can be spliced in sequence along the first direction X.
  • the length of the main cavity of the re-spliced first die head 1 becomes shorter to adapt to the pole piece with a smaller width.

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  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
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  • Coating Apparatus (AREA)

Abstract

一种涂布模头及包括该涂布模头的涂布装置。该涂布模头包括相对设置的第一模头（1）和第二模头（2），第一模头（1）包括第一模头本体（11）和多个第一唇口模块（12），多个第一唇口模块（12）沿第一方向依次拼接。每个第一唇口模块（12）可拆卸地连接于第一模头本体（11），每个第一唇口模块（12）设置有第一凹槽（121），多个第一唇口模块（12）的第一凹槽（121）拼接形成用于储存浆料的主腔体，第一方向为主腔体的长度方向。该涂布模头可更替或重新组合第一唇口模块，改变主腔体的长度以使涂布模头适配不同幅宽的极片生产。

Description

涂布模头及涂布装置
相关申请的交叉引用
本申请要求享有于2022年10月08日提交的名称为“涂布模头及涂布装置”的中国专利申请202222622960.4的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池极片加工设备技术领域，具体涉及一种涂布模头及涂布装置。
背景技术
涂布是锂离子电池生产过程中必不可少的工序，也是直接影响电池安全性、容量、寿命等各项性能的关键工序。涂布就是将制作好的糊状粘稠浆料，均匀的、连续或间断的涂覆在基材(铝箔或铜箔)上，涂布过程中需保证各个涂布位置的厚度一致性、并将涂布厚度控制在工艺要求的公差范围内。
当对基材涂布浆料时，生产不同幅宽极片时需要整体更换涂布模头，制造成本较高。
发明内容
鉴于上述问题，本申请提供一种涂布模头及涂布装置，能够避免生产不同幅宽极片时需整体更换涂布模头的问题。
第一方面，本申请提供了一种涂布模头，涂布模头包括相对设置的第一模头和第二模头，其中，第一模头包括第一模头本体和多个第一唇口模块，多个第一唇口模块沿第一方向依次拼接。每个第一唇口模块可拆卸地连接于第一模头本体，每个第一唇口模块设置有第一凹槽，多个第一唇口模块的第一凹槽拼接形成用于储存浆料的主腔体，第一方向为主腔体的长度方向。
本申请实施例的技术方案中，在生产不同幅宽极片时，可更替第一唇口模块或重新组合第一唇口模块，改变主腔体的长度以使涂布模头适配不同幅宽的极片生产。无需整体更换涂布模头，降低制造成本。
在一些实施例中，第一模头包括第一模头本体和多个第一唇口模块，多个第一唇口模块沿第一方向依次拼接。第一模头本体上设置有沿第一方向延伸的第一插槽，每个第一唇口模块具有第一凸块，第一凸块插接于第一插槽。当更替第一唇口模块时，第一唇口模块在第一凸块的作用下可方便的装配至第一模头本体的第一插槽内；当重新组合第一唇口模块时，无需拆除的第一唇口模块在第一凸块的作用下可以沿第一插槽滑动的方式实现多个第一唇口模块的依次拼接，降低了重新组合第一唇口模块的装 配难度。
在一些实施例中，第一模头本体上设置有沿所述第一方向延伸的第一插槽，每个第一唇口模块具有第一凸块，第一凸块插接于第一插槽。第一插槽内设置有多个第一定位孔，第一模头包括多个与第一定位孔一一对应的第一螺纹件，第一唇口模块通过穿过第一定位孔的第一螺纹件固定于第一模头本体。第一螺纹件提高了第一唇口模块与第一模头本体的连接稳定性。
在一些实施例中，第一模头本体包括基体和凸台，凸台凸出于基体的第一表面，第一唇口模块设置在第一表面上，第一插槽设置于凸台。
在一些实施例中，第一模头本体包括基体和凸台，凸台凸出于基体的第一表面，第一唇口模块设置在第一表面上，第一插槽设置于凸台。第一表面上设置有多个第二定位孔，第一模头还包括多个与第二定位孔一一对应的第二螺纹件，第一唇口模块通过穿过第二定位孔的第二螺纹件固定于基体。第二螺纹件提高了第一唇口模块与第一模头本体的连接稳定性。
在一些实施例中，第一唇口模块设置有第二凹槽，多个第一唇口模块的第二凹槽拼接形成用于缓存浆料的副腔体。副腔体可以缓存从主腔体流出的浆料，提高了涂布模头出料的均匀性。
在一些实施例中，相邻的两个所述第一唇口模块之间设置有第一密封件。第一密封件提高了第一模头的密封性，降低了第一模头出现浆料渗料的风险。
在一些实施例中，第一模头包括第一模头本体和多个第一唇口模块，多个第一唇口模块沿第一方向依次拼接，每个第一唇口模块可拆卸地连接于第一模头本体，第二模头包括第二模头本体和多个第二唇口模块，多个第二唇口模块沿第一方向依次拼接，每个第二唇口模块可拆卸地连接于第二模头本体，第二唇口模块与第一唇口模块之间的缝隙形成涂布模头的唇口。当涂布模头的唇口发生磨损或变形时，可单独更换或修复第一唇口模块或第二唇口模块，无需整体更换涂布模头，降低制成成本。
在一些实施例中，第二唇口模块和第一唇口模块一一对应布置。这样的设计，简化了第一唇口模块和第二唇口模块的结构设计，降低了制造成本。
在一些实施例中，第一唇口模块朝向第二唇口模块的一侧设置有第一镀层，第二唇口模块朝向第一唇口模块的一侧设置有第二镀层。这样的设计，提高了第一唇口模块和第二唇口模块的耐磨强度，提高了第一唇口模块和第二唇口模块的寿命。
在一些实施例中，第二模头本体上设置有沿第一方向延伸的第二插槽，第二唇口模块具有第二凸块，第二凸块插接于第二插槽。当更换第二唇口模块时，第二唇口模块在第二凸块的作用下可方便的装配至第二模头本体的第二插槽内。
在一些实施例中，第二模头本体上设置有沿第一方向延伸的第二插槽，第二唇口模块具有第二凸块，第二凸块插接于第二插槽。第二凸块上设置有多个第三定位孔，第二模头包括多个与第三定位孔一一对应的第三螺纹件，第二唇口模块通过穿过第三定位孔的第三螺纹件固定于第二模头本体。第三螺纹件提高了第二唇口模块与第二模头本体的连接稳定性。
在一些实施例中，相邻的两个第二唇口模块之间设置有第二密封件。第二密封 件提高了第二模头的密封性，降低了第二模头出现浆料渗料的风险。
第二方面，本申请提供了一种涂布装置，其包括上述实施例中的涂布模头。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请一些实施例的涂布模头的轴测图；
图2为本申请一些实施例的第一模头的轴测图；
图3为本申请一些实施例的第一模头本体的轴测图；
图4为本申请图3中A处的局部放大图；
图5为本申请一些实施例的第一唇口模块的轴测图；
图6为本申请又一些实施例的第一唇口模块的轴测图；
图7为本申请一些实施例的涂布模头的侧视图；
图8为本申请图7中B处的局部放大图；
图9为本申请一些实施例的第二模头的轴测图；
图10为本申请一些实施例的第二模头本体的轴测图；
图11为本申请一些实施例的第二唇口模块的轴测图；
图12为本申请图9中C处的局部放大图。
具体实施方式中的附图标号如下：
1-第一模头；11-第一模头本体；111-基体；1111-第一表面；1112-第二定位孔；112-凸台；1121-第一插槽；1122-第一定位孔；12-第一唇口模块；121-第一凹槽；122-第一凸块；1221-第一螺纹孔；123-第二凹槽；13-第一螺纹件；14-第二螺纹件；2-第二模头；21-第二模头本体；211-第二插槽；22-第二唇口模块；221-第二凸块；2211-第三定位孔；23-第三螺纹件；3-唇口；X-第一方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文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；本文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。
在本文中提及“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。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；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或两个元件的相互作用关系。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实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
涂布是将涂布材料以液体或粉末形式在织物，纸张，金属箔或板等物体表面上涂盖薄层。而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，电极组件由正极极片、负极极片和隔离膜组成。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部分表面，未涂覆正极活性物质层的正极集流体作为正极耳。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部分表面，未涂覆负极活性物质层的负极集流体作为负极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极耳的数量为多个且层叠在一起，负极耳的数量为多个且层叠在一起。
在电池单体的生产过程中，将正极活性物质涂覆于正极集流体上，以及将负极活性物质涂覆于负极集流体上用的正是涂布工艺，即将制作好的糊状粘稠浆料(正极活性物质或负极活性物质)均匀的、连续或间断的涂覆在基材(正极集流体或负极集流体)上，涂布时需保证各个涂布位置的厚度一致性、并将涂布厚度控制在工艺要求 的公差范围内。
涂布工艺所使用的涂布装置包括涂布模头、进料管道和浆料罐，模头本体一般包括上模头、下模头、进料口和料腔，料腔一般设置在下模头上，上模头和下模头之间的缝隙形成唇口。涂布装置涂布时，浆料罐内的浆料通过进料管道由进料口进入料腔，之后浆料从料腔流出并由唇口喷出涂布在基材上。
为了保证涂布时各个涂布位置的厚度具有较好的一致性，一般料腔的长度需要与极片的幅宽匹配。例如，若极片的幅宽远小于料腔的长度，料腔端部的浆料由于流动性变差会出现沉降、凝胶、团聚等异常问题，上述异常问题的出现会造成料腔的压力出现波动并导致涂布位置的厚度一致性变差。
本发明人注意到，在生产不同幅宽的极片时，为了避免上述问题的出现，需要将涂布模头整体更换，以使更换后的涂布模头与极片的幅宽相匹配，但整体更换模头会使制造成本急剧增加。
基于以上考虑，为了解决生产不同幅宽极片时需要整体更换涂布模头造成的制造成本增加的问题，发明人经过深入研究，设计了一种涂布模头，将下模头模块化，使设置在下模头上的料腔长度可变化以适应不同幅宽的极片。具体为将下模头设计为多个单元模块，单元模块具有可容纳浆料的凹槽，所有单元模块拼装形成完整的下模头，所有凹槽拼接形成用于储存浆料的料腔。在生产不同幅宽极片时，通过更替单元模块或重新组合单元模块的方式，改变料腔的长度以使涂布模头适配不同幅宽的极片生产，无需整体更换涂布模头，降低制造成本。
本申请实施例公开的涂布模头可以但不限于用于对正极集流体或负极集流体上涂布浆料。
根据本申请的一些实施例，参照图1和图2，本申请提供了一种涂布模头，涂布模头包括相对设置的第一模头1和第二模头2，其中，第一模头1包括第一模头本体11和多个第一唇口模块12，多个第一唇口模块12沿第一方向X依次拼接。每个第一唇口模块12可拆卸地连接于第一模头本体11，每个第一唇口模块12设置有第一凹槽121，多个第一唇口模块12的第一凹槽121拼接形成用于储存浆料的主腔体，第一方向X为主腔体的长度方向。
第一模头1可以为上模头/下模头，意味着，主腔体可以设置在上模头上也可设置在下模头上。
在一些实施例中，第一模头1和第二模头2可拆卸连接，示例性的，第一模头1和第二模头2通过多个螺钉连接。
第一模头1与第二模头2连接后，在第一模头1和第二模头2的相对侧需留有缝隙以形成供浆料流出涂布模头的唇口3。
在一些实施例中，为了提高第一模头1和第二模头2的使用寿命可在第一模头1和第二模头2朝向唇口3一侧增设增强其耐磨性的镀层。
供浆料进入主腔体的进料口可设置在涂布模头底面，亦可，设置在涂布模头侧面。在一些实施例中，涂布模头的进料口可为多个依次穿过第一模头本体11和第一唇口模块12的通道，示例性的，通道可由设置在第一模头本体11上的第一孔与设置在 第一唇口模块12上与上述第一孔一一对应的第二孔对接形成，通道可为多个亦可为一个，当通道为多个时，不与进料管连通的通道需要通过橡胶塞/硅胶塞封堵，以确保主腔体的密封性。
请参照图2，第一凹槽121可以一端开口一端封闭，第一凹槽121封闭的一端即形成封堵部，封堵部用于限制浆料流动，第一凹槽121亦可两端均开口。
主腔体两端需设置封堵件或具有封堵部以形成容纳空间储存浆料，示例性的，请参照图2，第一模头1两端的第一唇口模块12的第一凹槽121远离主腔体中心一端具有封堵部，第一模头1中部的第一唇口模块12的第一凹槽121两端均开口。在一些实施例中，所有第一唇口模块12的第一凹槽121均两端开口，在所有第一唇口模块12沿第一方向X依次拼接后需要在第一模头1的两端增设封堵件，封堵件可封闭第一凹槽121的开口。例如，封堵件可为板体，板体通过螺钉安装在第一模头1两端的第一唇口模块12侧面。
在一些实施例中，考虑到加工成本和加工难度，可降低第一唇口模块12端面的加工精度，此时，当所有第一唇口模块12拼接完成后，相邻的第一唇口模块12之间容易出现装配间隙，为了提高拼接形成的第一模头1的密封性可在相邻的第一唇口模块12间增设密封件。
不同第一唇口模块12的第一凹槽121的长度可以相同/不同，且安装位置随机。
在一些实施例中，所有第一唇口模块12的第一凹槽121的长度均相同为D，主腔体的长度为D的整数倍，在设计时，可将D设计为多种涂布宽度的公约数，在生产不同幅宽极片时只需选取特定数量的第一唇口模块12进行拼接即可实现主腔体长度与极片幅宽的匹配。
在一些实施例中，可设置多个第一凹槽121长度不同的具有封堵部的第一唇口模块12，仅更换具有封堵部的第一唇口模块12也可实现主腔体长度的调节。
第一唇口模块12与第一模头本体11可通过榫卯结构连接，亦可，通过紧固件如螺钉、螺栓与螺母连接。
在一些实施例中，第一唇口模块12可增设用于缓存浆料的第二凹槽123。
在生产不同幅宽极片时，可更替第一唇口模块12或重新组合第一唇口模块12，改变主腔体的长度以使涂布模头适配不同幅宽的极片生产。无需整体更换涂布模头，降低制造成本。
根据本申请的一些实施例，请参照图2-图6，第一模头1包括第一模头本体11和多个第一唇口模块12，多个第一唇口模块12沿第一方向X依次拼接。第一模头本体11上设置有沿第一方向X延伸的第一插槽1121，每个第一唇口模块12具有第一凸块122，第一凸块122插接于第一插槽1121。
第一凸块122的截面形状可为梯形、正方形、长方形、半圆形等。
第一凸块122可在第一唇口模块12加工时一体成型，亦可，分体加工后焊接成型于第一唇口模块12。
当更替第一唇口模块12时，第一唇口模块12在第一凸块122的作用下可方便的装配至第一模头本体11的第一插槽1121内；当重新组合第一唇口模块12时，无需 拆除的第一唇口模块12在第一凸块122的作用下可以沿第一插槽1121滑动的方式实现多个第一唇口模块12的依次拼接，降低了重新组合第一唇口模块12的装配难度。
根据本申请的一些实施例，请参照图2-图7，第一模头本体11上设置有沿所述第一方向X延伸的第一插槽1121，每个第一唇口模块12具有第一凸块122，第一凸块122插接于第一插槽1121。第一插槽1121内设置有多个第一定位孔1122，第一模头1包括多个与第一定位孔1122一一对应的第一螺纹件13，第一唇口模块12通过穿过第一定位孔1122的第一螺纹件13固定于第一模头本体11。
第一定位孔1122可为光孔、螺孔、沉孔等。
第一螺纹件13可为螺钉/螺杆，示例性的，第一螺纹件13为螺杆，当第一螺纹件13穿过第一定位孔1122后可通过与螺杆配合的螺母将第一唇口模块12固定于第一模头本体11。
第一模头1还可包括与第一螺纹件13配合的垫片。
在一些实施例中，为了配合第一螺纹件13可在第一凸块122上加工与第一螺纹件13配合的第一螺纹孔1221。
第一螺纹件13提高了第一唇口模块12与第一模头本体11的连接稳定性。
根据本申请的一些实施例，请参照图3，第一模头本体11包括基体111和凸台112，凸台112凸出于基体111的第一表面1111，第一唇口模块12设置在第一表面1111上，第一插槽1121设置于凸台112。
基体111与凸台112可一体成型，亦可，在凸台112和基体111分体加工后，将凸台112通过焊接的方式成型于基体111的第一表面1111。
凸台112可设置在基体111第一表面1111的中部/边缘。
根据本申请的一些实施例，请参照图2-图7，第一模头本体11包括基体111和凸台112，凸台112凸出于基体111的第一表面1111，第一唇口模块12设置在第一表面1111上，第一插槽1121设置于凸台112。第一表面1111上设置有多个第二定位孔1112，第一模头1还包括多个与第二定位孔1112一一对应的第二螺纹件14，第一唇口模块12通过穿过第二定位孔1112的第二螺纹件14固定于基体111。
第二定位孔1112可为光孔、螺孔、沉孔等。
第二螺纹件14可为螺钉/螺杆，示例性的，第二螺纹件14为螺杆，当第二螺纹件14穿过第二定位孔1112后可通过与螺杆配合的螺母将第一唇口模块12固定于第一模头本体11。
第一模头1还可包括与第二螺纹件14配合的垫片。
第二螺纹件14提高了第一唇口模块12与第一模头本体11的连接稳定性。
根据本申请的一些实施例，请参照图2、图5和图6，第一唇口模块12设置有第二凹槽123，多个第一唇口模块12的第二凹槽123拼接形成用于缓存浆料的副腔体。
在一些实施例中，多个第一唇口模块12沿第一方向X依次拼接后，相邻的第二凹槽123沿第一方向X排布但存在距离。
副腔体可以缓存从主腔体流出的浆料，平衡主腔体的压力，提高了涂布模头出料的均匀性。
根据本申请的一些实施例，相邻的两个所述第一唇口模块12之间设置有第一密封件。
第一密封件可为硅胶密封垫、橡胶密封垫等。
第一密封件提高了第一模头1的密封性，降低了第一模头1出现浆料渗料的风险。
根据本申请的一些实施例，请参照图8-图9，第一模头1包括第一模头本体11和多个第一唇口模块12，多个第一唇口模块12沿第一方向X依次拼接，每个第一唇口模块12可拆卸地连接于第一模头本体11，第二模头2包括第二模头本体21和多个第二唇口模块22，多个第二唇口模块22沿第一方向X依次拼接，每个第二唇口模块22可拆卸地连接于第二模头本体21，第二唇口模块22与第一唇口模块12之间的缝隙形成涂布模头的唇口3。
多个第二唇口模块22的长度可相同/不同。
在一些实施例中，第二模头2可包括一个第二唇口模块22，第二唇口模块22与第二模头本体21可拆卸连接，第二唇口模块22的长度与所有第一唇口模块12拼接后的长度基本一致。
在一些实施例中，第二唇口模块22与第一唇口模块12一一对应设置，可同步更替。
在一些实施例中，考虑到加工成本和加工难度，可降低第二唇口模块22端面的加工精度，此时，当所有第二唇口模块22拼接完成后，相邻的第二唇口模块22之间容易出现装配间隙，为了提高拼接形成的第二模头2的密封性可在相邻的第二唇口模块22间增设密封件。
第二唇口模块22与第二模头本体21可通过榫卯结构连接，亦可，通过紧固件如螺钉、螺栓与螺母连接。
当涂布模头的唇口3发生磨损或变形时，可单独更换或修复第一唇口模块12或第二唇口模块22，无需整体更换涂布模头，降低制成成本。
根据本申请的一些实施例，第二唇口模块22和第一唇口模块12一一对应布置。
第二唇口模块22和第一唇口模块12一一对应设置，意味着，第一唇口模块12和第二唇口模块22的位置、长度基本一致。
这样的设计，简化了第一唇口模块12和第二唇口模块22的结构设计，降低了制造成本。
根据本申请的一些实施例，第一唇口模块12朝向第二唇口模块22的一侧设置有第一镀层，第二唇口模块22朝向第一唇口模块12的一侧设置有第二镀层。
第一镀层和第二镀层可为增强硬度和机械强度的镀层，增强硬度和机械强度的镀层种类为本领域技术人员公知的在此不赘述。
这样的设计，提高了第一唇口模块12和第二唇口模块22的耐磨强度，提高了第一唇口模块12和第二唇口模块22的寿命。
根据本申请的一些实施例，请参照图9-图12，第二模头本体21上设置有沿第一方向X延伸的第二插槽211，第二唇口模块22具有第二凸块221，第二凸块221 插接于第二插槽211。
第二凸块221的截面形状可为梯形、正方形、长方形、半圆形等。
第二凸块221可在第二唇口模块22加工时一体成型，亦可，分体加工后焊接成型于第一唇口模块12。
当更换第二唇口模块22时，第二唇口模块22在第二凸块221的作用下可方便的装配至第二模头本体21的第二插槽211内。
根据本申请的一些实施例，请参照图9-图12，第二模头本体21上设置有沿第一方向X延伸的第二插槽211，第二唇口模块22具有第二凸块221，第二凸块221插接于第二插槽211。第二凸块221上设置有多个第三定位孔2211，第二模头2包括多个与第三定位孔2211一一对应的第三螺纹件23，第二唇口模块22通过穿过第三定位孔2211的第三螺纹件23固定于第二模头本体21。
第三定位孔2211可为光孔、螺孔、沉孔等。
第三螺纹件23可为螺钉/螺杆，示例性的，第三螺纹件23为螺杆，当第三螺纹件23穿过第三定位孔2211后可通过与螺杆配合的螺母将第二唇口模块22固定于第二模头本体21。
第二模头2还可包括与第三螺纹件23配合的垫片。
在一些实施例中，为了配合第三螺纹件23可在第二插槽211的侧壁加工与第三螺纹件23配合的第二螺纹孔。
第三螺纹件23提高了第二唇口模块22与第二模头本体21的连接稳定性。
根据本申请的一些实施例，相邻的两个第二唇口模块22之间设置有第二密封件。
第二密封件可为硅胶密封垫、橡胶密封垫等。
第二密封件提高了第二模头2的密封性，降低了第二模头2出现浆料渗料的风险。
根据本申请的一些实施例，本申请还提供了一种涂布装置，包括以上任一方案中的涂布模头。
根据本申请的一些实施例，参见图1至图8，本申请提供了一种涂布模头，涂布模头包括相对设置的第一模头1和第二模头2，第一模头1包括第一模头本体11和四个第一唇口模块12，四个第一唇口模块12沿第一方向X依次拼接。每个第一唇口模块12可拆卸地连接于第一模头本体11，每个第一唇口模块12设置有第一凹槽121，四个第一唇口模块12的第一凹槽121拼接形成用于储存浆料的主腔体，第一方向X为主腔体的长度方向。
第一模头本体11包括基体111和凸台112，凸台112凸出于基体111的第一表面1111，第一唇口模块12设置在第一表面1111上，凸台112上设置有沿第一方向X延伸的第一插槽1121，每个第一唇口模块12具有第一凸块122，第一凸块122插接于第一插槽1121。
第一插槽1121内设置有多个第一定位孔1122，第一模头1包括多个与第一定位孔1122一一对应的第一螺纹件13。第一表面1111上设置有多个第二定位孔1112， 第一模头1还包括多个与第二定位孔1112一一对应的第二螺纹件14，第一唇口模块12通过穿过第一定位孔1122的第一螺纹件13和穿过第二定位孔1112的第二螺纹件14固定于第一模头本体11。
当生产不同幅宽的极片时，可更替或重新组合第一唇口模块12使主腔体的长度与极片的幅宽匹配。请参照图2，当需生产的更小幅宽的极片时，可拆除第一模头1中部的其中一个第一唇口模块12后，将剩余的第一唇口模块12沿第一方向X依次拼接，重新拼接后的第一模头1的主腔体的长度变短即可适配更小幅宽的极片。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (14)

  1. 一种涂布模头，包括相对设置的第一模头和第二模头；其中，所述第一模头包括第一模头本体和多个第一唇口模块，多个所述第一唇口模块沿第一方向依次拼接，每个所述第一唇口模块可拆卸地连接于所述第一模头本体，每个所述第一唇口模块设置有第一凹槽，多个所述第一唇口模块的所述第一凹槽拼接形成用于储存浆料的主腔体，所述第一方向为所述主腔体的长度方向。
  2. 根据权利要求1所述的涂布模头，其中，所述第一模头本体上设置有沿所述第一方向延伸的第一插槽，每个所述第一唇口模块具有第一凸块，所述第一凸块插接于所述第一插槽。
  3. 根据权利要求2所述的涂布模头，其中，所述第一插槽内设置有多个第一定位孔，所述第一模头包括多个与所述第一定位孔一一对应的第一螺纹件，所述第一唇口模块通过穿过所述第一定位孔的所述第一螺纹件固定于所述第一模头本体。
  4. 根据权利要求2或3所述的涂布模头，其中，所述第一模头本体包括基体和凸台，所述凸台凸出于所述基体的第一表面，所述第一唇口模块设置在所述第一表面上，所述第一插槽设置于所述凸台。
  5. 根据权利要求4所述的涂布模头，其中，所述第一表面上设置有多个第二定位孔，所述第一模头还包括多个与所述第二定位孔一一对应的第二螺纹件，所述第一唇口模块通过穿过所述第二定位孔的所述第二螺纹件固定于所述基体。
  6. 根据权利要求1-5任一项所述的涂布模头，其中，所述第一唇口模块设置有第二凹槽，多个所述第一唇口模块的所述第二凹槽拼接形成用于缓存所述浆料的副腔体。
  7. 根据权利要求1-5任一项所述的涂布模头，其中，相邻的两个所述第一唇口模块之间设置有第一密封件。
  8. 根据权利要求1-7任一项所述的涂布模头，其中，所述第二模头包括第二模头本体和多个第二唇口模块，多个所述第二唇口模块沿所述第一方向依次拼接，每个所述第二唇口模块可拆卸地连接于所述第二模头本体，所述第二唇口模块与所述第一唇口模块之间的缝隙形成所述涂布模头的唇口。
  9. 根据权利要求8所述的涂布模头，其中，所述第二唇口模块和所述第一唇口模块一一对应布置。
  10. 根据权利要求8或9所述的涂布模头，其中，所述第一唇口模块朝向所述第二唇口模块的一侧设置有第一镀层，所述第二唇口模块朝向所述第一唇口模块的一侧设置有第二镀层。
  11. 根据权利要求8或9所述的涂布模头，其中，所述第二模头本体上设置有沿所述第一方向延伸的第二插槽，所述第二唇口模块具有第二凸块，所述第二凸块插接于所述第二插槽。
  12. 根据权利要求11所述的涂布模头，其中，所述第二凸块上设置有多个第三定位孔，所述第二模头包括多个与所述第三定位孔一一对应的第三螺纹件，所述第二唇口模块通过穿过所述第三定位孔的所述第三螺纹件固定于所述第二模头本体。
  13. 根据权利要求8-12任一项所述的涂布模头，其中，相邻的两个所述第二唇口模块之间设置有第二密封件。
  14. 一种涂布装置，其中，包括权利要求1-13任一项所述的涂布模头。
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