WO2022218418A1 - 喷头组件、分配系统、电极片材条带以及电极 - Google Patents

喷头组件、分配系统、电极片材条带以及电极 Download PDF

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Publication number
WO2022218418A1
WO2022218418A1 PCT/CN2022/087132 CN2022087132W WO2022218418A1 WO 2022218418 A1 WO2022218418 A1 WO 2022218418A1 CN 2022087132 W CN2022087132 W CN 2022087132W WO 2022218418 A1 WO2022218418 A1 WO 2022218418A1
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WO
WIPO (PCT)
Prior art keywords
fluid
die
lip
electrode sheet
assembly
Prior art date
Application number
PCT/CN2022/087132
Other languages
English (en)
French (fr)
Inventor
邱中全
Original Assignee
诺信公司
邱中全
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.)
Filing date
Publication date
Application filed by 诺信公司, 邱中全 filed Critical 诺信公司
Priority to EP22787640.6A priority Critical patent/EP4324570A1/en
Priority to KR1020237039060A priority patent/KR20230172528A/ko
Priority to JP2023563220A priority patent/JP2024514206A/ja
Publication of WO2022218418A1 publication Critical patent/WO2022218418A1/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
    • 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
    • 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
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • 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
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • 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
    • B05C5/0225—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 characterised by flow controlling means, e.g. valves, located proximate the outlet
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • 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
    • H01M4/04—Processes of manufacture in general
    • 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
    • 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 a showerhead assembly, dispensing system, electrode sheet strip, and electrode.
  • Electric vehicles are a development direction of current automotive technology. Endurance is an important parameter to characterize the performance of electric vehicles. The range is mainly determined by the performance of the electric vehicle battery. Lithium-ion batteries such as so-called chip batteries are a very important direction of battery research. Typically, lithium-ion batteries for electric vehicles, especially sheet-type batteries, have an aluminum casing inside which the cells are housed. Multiple lithium-ion cells are placed side by side to form a battery pack. Insulation treatment is required between lithium-ion batteries, while the pursuit of the lowest possible coating weight.
  • lithium ions are deintercalated from the positive electrode and embedded in the negative electrode; while under abnormal conditions such as overcharge, low temperature or strong current, the lithium ions deintercalated from the positive electrode will appear abnormally embedded in the negative electrode. In this case, lithium ions can only be precipitated on the surface of the negative electrode. This is called lithium evolution.
  • lithium ions will be reduced to different forms of metallic lithium on the surface of the negative electrode, one of which is called lithium dendrite, which will continue to grow like a branch with the lithium precipitation phenomenon and this process is irreversible;
  • the crystal grows to a certain length, it will break through the diaphragm between the positive and negative electrodes, resulting in an internal short circuit of the cell, which is very likely to cause thermal runaway and even explosion, which is very dangerous.
  • a very thin adhesive material needs to be applied to the cell surface.
  • the thermal bonding material larger than 10mm (width) and smaller than 20 ⁇ m (thickness) on the electrode sheet of its battery, which is very important for improving the reliability of automobile batteries.
  • the hot glue must be very thin and evenly coated on the surface of the electrode sheet.
  • electrode sections for forming electrodes are usually formed by cutting the electrode sheet, and the outer edges of the electrode sheet also need to be protected before cutting the electrode sheet to form the electrode sections, especially during die cutting. This is obviously a serious challenge to existing glued products.
  • Current methods and products are difficult to achieve uniform paste thicknesses of less than 20 [mu]m on the electrode sheet, and it is difficult to apply the paste to the entire surface of the cathode section used to form the cathode.
  • the purpose of the present invention is to provide a spray head assembly, which can spray cloth fluid such as glue, especially polyurethane liquid glue with high precision, so as to realize an extremely thin glue layer. Further, the present invention also provides a distribution system, an electrode sheet strip, and an electrode.
  • a showerhead assembly which is characterized by comprising: a lip, the lip is configured to have an annular body portion and a dam member at the center, the dam member extending from the body portion surrounded by a rectangular The bottom edge of the space extends towards the top edge such that a rectangular opening is formed between the top edge of the dam member and the top edge of the rectangular space, the dam member extending the entire width of the rectangular opening in the transverse direction of the lip width, the rectangular opening is adapted to receive fluid; and a cover plate configured to connect to the lip, wherein the dam member is opposite to a surface of the lip to which the cover plate is connected Recessed so that a collecting groove is formed between the cover plate and the dam member, the collecting groove is in fluid communication with the rectangular opening, and in the two surfaces of the cover plate and the lip facing each other A concave portion is provided on one surface of the indentation, and the concave portion is in fluid communication with the collecting groove so that the fluid can flow out from the collecting groove through the conca
  • the thickness and width of the fluid dispensed from the recesses can be controlled precisely and stably, so that a desired thickness, especially a very thin coating, can be obtained on the substrate/workpiece.
  • the recess is provided on a surface of the lip facing the cover plate.
  • the recesses can be produced in a simple and efficient manner.
  • the width of the recessed portion is smaller than or equal to the width of the dam member, so that the fluid can flow out from the space through the recessed portion uniformly in a band shape.
  • the recesses have a uniform recessed depth with respect to the surface on which the recesses are provided and the recessed depths are 50 ⁇ m to 150 ⁇ m.
  • an extremely thin adhesive layer can be coated on the surface of the substrate.
  • the dam member is recessed relative to a surface of the lip on the opposite side of the cover plate.
  • a boss is provided on the outer edge of the lip on the side connected with the seal to limit the movement of the seal.
  • a guide boss is provided on the bottom surface of the cover plate and/or the lip.
  • the cover plate and the lip are sequentially fixed together by screws. Thereby, simple assembly can be realized.
  • a dispensing system characterized by comprising: a fluid supply assembly; a metering assembly in the form of a positive displacement pump and configured to be in fluid communication with the fluid supply assembly to receive a a fluid of a fluid supply assembly; and a spray head assembly in fluid communication with the metering assembly to receive fluid from the metering assembly, wherein the spray head assembly is according to any preceding claim sprinkler assembly.
  • the fluid supply assembly includes a delivery container.
  • the delivery container is configured to accommodate a glue tank, or is configured to be connected to a tube supplying glue.
  • the metering assembly includes a driving gear and a driven gear.
  • the driving gear is driven by a motor.
  • the metering assembly includes: a top plate with a top plate flow channel for receiving fluid from the fluid supply assembly; a bottom plate with a bottom plate flow channel, the bottom plate flow channel and the rectangular shape of the spray head assembly an opening in fluid communication; and a gear support plate located between the top plate and the bottom plate and having an aperture at a central portion for receiving the drive gear and the driven gear gear.
  • the respective gear shafts of the driving gear and driven gear are inserted into corresponding holes in the base plate to provide positioning of the gear shafts
  • the gap between the driving gear and the driven gear on one side of the metering assembly is in fluid communication with the top plate flow passage of the top plate, and the gap between the driving gear and the driven gear is in fluid communication with the top plate flow passage of the top plate.
  • the gap between the two on the other side of the metering assembly is in fluid communication with the bottom plate flow channel of the bottom plate.
  • a sealing member is provided between the gear support plate and the base plate, the sealing member surrounding an aperture in the gear support plate.
  • the lip of the spray head assembly is connected to the base plate such that the top edge of the dam member is higher than the outlet of the base plate flow channel.
  • a seal is provided between the lip and the base plate, the seal having a rectangular central opening.
  • the width of the central opening is greater than or equal to the width of the rectangular opening, and the height of the central opening is greater than or equal to the distance from the top edge of the rectangular opening to the bottom edge of the outlet of the bottom plate runner of the bottom plate.
  • the bottom plate has a protrusion in which the outlet of the bottom plate flow channel of the bottom plate is arranged, the protrusion being adapted to be connected to the lip.
  • the present application also relates to a method for dispensing a fluid onto a substrate using said dispensing system, said substrate having a relatively thin portion, characterized in that said method comprises the step of: using said dispensing system to dispense fluid onto on the thinner part of the substrate.
  • the substrate is an electrode sheet for manufacturing an electrode of a battery, the electrode sheet having a thicker body portion and a thinner edge portion, the edge portion being located on one side of the body portion and Continuing with the body portion, the method includes the step of using the dispensing system to dispense fluid onto the surface of the edge portion to produce a strip of electrode sheet material.
  • the battery may be a chip battery.
  • the method comprises: conveying the electrode sheet to a die-cutting machine and die-cutting the edge portion along a die-cutting path with the die-cutting machine; and after die-cutting, using the dispensing
  • the system dispenses fluid onto the surface of the rim.
  • the die-cutting machine starts die-cutting at a distance from the leading end of the electrode sheet, and ends the die-cutting at a distance from the trailing end of the electrode sheet.
  • the edge portion of the electrode sheet is die cut such that the width of the die cut slot on the edge portion is adapted to allow fluid from the dispensing system to fully penetrate the die cut slot.
  • the width of the die-cut slot hole is determined according to the thickness of the edge portion, the coating temperature of the fluid and/or the sheet conveying speed.
  • the die cutting path is non-linear.
  • the edge portion is die cut to form a plurality of electrode ears along the die cut path.
  • the electrode ears are preferably trapezoidal.
  • the present application also provides an electrode sheet strip, which is used for manufacturing an electrode of a battery, characterized in that the electrode sheet strip is manufactured by using the method.
  • the electrode sheet strip is cut widthwise into a plurality of sheet sections of the same shape, which are laminated together to constitute the electrode.
  • the present application also provides an electrode, characterized in that, the electrode is made of the electrode sheet strip.
  • the electrode is the anode or cathode of the cell.
  • the spraying component and the dispensing system of the utility model can realize extremely thin glue thickness, for example, less than 20 ⁇ m, thereby meeting the spraying requirements on the surface of the chip battery of the electric vehicle.
  • the method described in this application can apply glue to the outer edges of the electrode ears of the sheet battery for protection.
  • FIG. 1 is an oblique front exploded view showing a showerhead assembly according to the present invention.
  • FIG. 2 is an oblique rear exploded view showing a showerhead assembly according to the present invention.
  • FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 showing a showerhead assembly according to the present invention.
  • Figure 4 shows a side view of a showerhead assembly according to the present invention.
  • Figure 5 shows a front view of a showerhead assembly according to the present invention.
  • FIG. 6 is an exploded view showing a dispensing system including a spray head assembly according to the present invention.
  • Figure 7 is a cross-sectional view showing the dispensing system.
  • Figure 8 is an oblique front exploded view showing a portion of the dispensing system.
  • Figure 9 is an oblique rear exploded view showing a portion of the dispensing system.
  • FIG. 10 is a perspective view of an electrode sheet for producing an electrode of a battery cell.
  • FIG. 11 is a perspective view of a strip of electrode sheet obtained after the electrode sheet is die-cut in the prior art.
  • Figure 12 is a perspective view showing a strip of electrode sheet obtained after the electrode sheet has been die cut according to the new die cutting process.
  • Figure 13 is a schematic diagram showing the working principle of the combination of the dispensing system and the new die cutting process according to the present invention.
  • FIG. 1 is an oblique front exploded view showing a showerhead assembly according to the present invention.
  • the nozzle assembly 60 mainly includes a lip 7 and a cover plate 6 .
  • the lip 7 is generally rectangular plate-like and has an annular body portion 70 and a centrally located dam member 72 extending from the bottom edge towards the top edge of the rectangular space enclosed by the body portion 70 such that A rectangular opening 71 is formed between the top edge of the dam member 72 and the top edge of the rectangular space.
  • the dam member 72 extends the entire width of the rectangular opening 71 in the lateral direction of the lip 7 .
  • the lateral direction of the lip 7 is the same as the lateral direction of the rectangular opening 71 .
  • the rectangular opening 71 is adapted to receive fluid.
  • the rectangular opening 71 can be connected to a fluid supply, a metering assembly connected to the fluid supply, or the like.
  • the cover plate 6 is configured to be connected to the lip 7 .
  • the front surface of the cover plate 6 is flat, and the rear surface is used for connection with the lip 7 .
  • the dam member 72 is recessed to a certain depth relative to the front surface of the lip 7 connected to the cover plate 6 so that a gathering groove 721 is formed between the cover plate 6 and the dam member 72 (see 3 ), the collecting groove 721 is in fluid communication with the rectangular opening 71 .
  • a recess 73 is provided on one of the two surfaces of the cover plate 6 and the lip 7 that face each other, and the width of the recess 73 in the lateral direction of the lip 7 is significantly greater than its depth .
  • the concave portion 73 is in fluid communication with the collecting groove 721 so that fluid can flow out from the collecting groove 721 through the concave portion 73 in a band shape.
  • the concave portion 73 is provided on the front surface of the lip 7 facing the cover plate 6 , and the width of the concave portion 73 in the lateral direction is less than or equal to The width of the dam member 72 .
  • the width of the dam member 72 is equal to the width of the rectangular opening 71 in the transverse direction of the lip 7 .
  • the concave portion 73 is recessed by 50 ⁇ m to 150 ⁇ m with respect to the surface on which the concave portion 73 is provided.
  • the recessed depths of the recesses 73 are preferably uniform.
  • the dam member 72 is recessed to a uniform depth with respect to the surface of the lip 7 facing the cover plate 6 , ie the front surface.
  • the configuration of the dam member 72 is not limited thereto, but may extend obliquely rearward from the bottom of the dam member 72 toward the top.
  • FIG. 2 is an oblique rear exploded view showing a showerhead assembly according to the present invention.
  • the back surface of the cover plate 6 that is, the surface of the cover plate 6 connected to the lip 7 is preferably flat.
  • FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 showing a showerhead assembly according to the present invention.
  • the dam member 72 is recessed with respect to the surface of the lip 7 on the side opposite to the cover plate 6 , ie the back surface, so that the dam member 72 is recessed
  • a space serving as a gathering groove 722 is formed on the side opposite to the cover plate 6 . It is easy to understand that the concave depth of the collecting groove 722 may be 0, that is, the collecting groove 722 is not provided.
  • the outer edge of the lip 7 on the side opposite to the cover plate 6 is preferably provided with a boss 74 for receiving the sealing member and restricting the movement of the sealing member.
  • the cover plate 6 and the lip 7 are fastened together, for example, by screws.
  • the thickness of the dam member 72 is not particularly limited here, and generally the thickness is smaller than the thickness of the lip 7 .
  • the thickness of the dam member 72 and the depth of the recess on both sides can be determined according to specific coating requirements. As shown in Figure 3, on the side of the dam member 72 facing the cover plate 6, the bottom edge of the dam member 72 transitions smoothly with the top edge of the recess 73 to facilitate the flow of fluid material.
  • the recessed depth of the gathering groove 721 is not particularly limited. For example, the recessed depth of the collecting groove 721 is approximately equal to the height of the opening 71 .
  • the recessed depth of the collecting groove 722 is less than or equal to the height of the opening 71 , in other words, the depth of the collecting groove 722 is less than or equal to the distance from the top edge of the opening 71 to the bottom edge thereof.
  • the lip 7 and the cover plate 6 have approximately the same thickness.
  • the lip 7 and the cover plate 6 have substantially the same transverse cross-sectional outer contour.
  • Figure 4 shows a side view of a showerhead assembly according to the present invention.
  • the surfaces of the cover plate 6 and the lip piece 7 facing the workpiece to be coated that is, the bottom surface, may have guide bosses 65 and 75 respectively, and after assembly, the cover plate 6 and the lip piece 7 have the same height , flatness, roughness, etc. are very small, thereby avoiding scratches and scratches on the surface of the workpiece to be coated in the working state.
  • Figure 5 shows a front view of a showerhead assembly according to the present invention.
  • the bottom surface of the guide boss 65 of the cover plate 6 has a step 651 .
  • the guide bosses on the bottom surfaces of the cover plate 6 and the lip 7 can be flat, alternatively or additionally also have steps, and the steps can be in any position, with any length and height. The specific size of the steps can be determined according to the actual spraying requirements.
  • FIG. 6 is an exploded view illustrating a dispensing system including a spray head assembly in accordance with the present invention.
  • the dispensing system includes a fluid supply assembly, a metering assembly 3 and a spray head assembly 60 .
  • the fluid supply assembly includes a delivery container 9 .
  • the delivery container 9 can accommodate various specifications of glue cans, such as 300cc glue cans.
  • Fluid materials suitable for dispensing are not limited to liquid glues, but can be a variety of other fluid materials in spray coating processes.
  • the liquid glue can be insulating liquid glue or conductive liquid glue.
  • the conductive liquid glue contains conductive substances in order to conduct electricity after being coated on the surface of the workpiece.
  • the transfer container 9 can be connected to a hose or other connecting pipe. This hose or other connecting pipe is directly connected to another metering system and/or fluid source. In the present invention, if a hose connection is used, the cut-off control module must be set at the position where the fluid begins to flow into the metering assembly 3.
  • the metering assembly 3 is an integrated metering system and is in the form of a positive displacement pump. Positive displacement pumps can have a variety of configurations.
  • the metering assembly 3 is configured to be in fluid communication with the delivery vessel 9 to receive fluid from the delivery vessel 9 .
  • the metering assembly 3 mainly includes a pair of gear sets, ie, a driving gear 31 and a driven gear 32 .
  • the pinion gear is driven by a driving device such as a motor 1 .
  • the motor 1 is, for example, a servo motor.
  • the driving gear 31 and the driven gear 32 constitute a pair of micro-gear sets capable of conveying fluid.
  • the metering assembly 3 further includes: a top plate 2 with a top plate flow channel for receiving fluid from the delivery container 9; a bottom plate 5 with a bottom plate flow channel, the bottom plate flow channel and the spray head assembly 60 such as The rectangular opening 71 of the showerhead assembly 60 is in fluid communication; the gear support plate 4 is located between the top plate 2 and the bottom plate 5 .
  • the gear support plate 4 has an aperture at the central portion for accommodating the driving gear 31 and the driven gear 32 . That is, a micro gear set constituted by the driving gear 31 and the driven gear 32 is provided in the gear support plate 4, thereby constituting an internal metering pump.
  • the gap between the driving gear 31 and the driven gear 32 on one side of the metering assembly 3 is in fluid communication with the top plate flow channel of the top plate 2, and the driving gear 31 and the driven gear
  • the gap between the gears 32 on the other side of the metering assembly 3 is in fluid communication with the bottom plate runners of the bottom plate 5 .
  • a seal is provided between the gear support plate 4 and the bottom plate 5 , and the seal surrounds the aperture in the gear support plate 4 .
  • the lip 7 of the showerhead assembly 60 is attached to the base plate 5 such that the top edge of the dam member 72 is higher than the outlet of the base plate runner.
  • a fluid such as hot glue
  • the metering pump i.e. the interior space of the metering assembly 3
  • the showerhead assembly 60 is in fluid communication with the metering assembly 3 and is thereby capable of receiving fluid material from the metering assembly 3 .
  • the fluid material can pass through the fluid supply assembly, in particular the delivery container 9, the metering assembly 3, the opening 71 in the lip 7, and then flow out of the spray head assembly in a precise amount through the recess 73 between the lip 7 and the cover plate 6.
  • the delivery container 9 can be secured together and in fluid communication with the metering assembly 3 in a number of ways.
  • the transfer container 9 is disposed directly on the top plate 2 of the metering assembly 3 and is in fluid communication with the top plate flow channel in the top plate 2 .
  • a drive for driving the metering assembly 3 eg a motor 1 , and a transport container 9 are arranged side by side on the top plate 2 .
  • the fluid material from the transfer vessel 9 flows into the metering assembly 3 via the top plate flow channels in the top plate 2 .
  • the gear shaft 33 of the driving gear 31 of the metering assembly 3 and the gear shaft 34 of the driven gear 32 pass through the gear support plate 4 and are inserted into the top plate 2 and the bottom plate 5 at both ends, respectively.
  • the motor 1 and the gear set are arranged on opposite sides of the top plate 2, respectively.
  • the gear shaft 33 of the driving gear 31 is drivingly connected with the output shaft (not shown) of the motor 1 through a through hole provided in the top plate 2 .
  • Both ends of the gear shaft 34 of the driven gear 32 are inserted into holes provided in the top plate 2 and holes provided in the bottom plate 5, respectively.
  • the gear shaft 34 of the driven gear 32 supports the driven gear 32 on the one hand, and realizes the positioning of the gear set on the other hand.
  • the top plate 2, the gear support plate 4 and the bottom plate 5 are preferably fixed together by screws.
  • the dispensing system also includes a control assembly 11 to control the operation of the dispensing system.
  • the control assembly 11 may be fixed to the housing of the transport container 9 , eg on the opposite side of the transport container 9 from the motor 1 .
  • FIG. 7 is a cross-sectional view illustrating a dispensing system according to the present invention.
  • Figure 7 shows the flow path of the fluid material inside the dispensing system.
  • the fluid material from the conveying container 9 flows into the top plate flow channel of the top plate 2 of the metering assembly 3 through the outlet of the conveying container 9 .
  • the top plate 2 for example, internally includes a vertical flow channel 21, a horizontal flow channel 22 and a vertical flow channel 23 in sequence, which flow channels are in fluid communication in sequence and correspond to the top plate flow channels.
  • the fluid material from the delivery vessel 9 enters the vertical flow channels 21 of the top plate 2, and then flows through the horizontal flow channels 22 and the vertical flow channels 23.
  • the fluid material from the vertical flow channel 23 of the top plate 2 enters into the gap on the input side of the metering assembly 3 , and then enters the gap on the output side of the metering assembly 3 driven by the gear pair, namely the driving gear 31 and the driven gear 32 .
  • the fluid material from the output side gap of the metering assembly 3 flows into the bottom plate flow channels of the bottom plate 5 of the metering assembly 3 , specifically into the vertical flow channels 52 of the bottom plate 5 first, and then into the horizontal flow channels 53 .
  • the fluid material from the horizontal flow channel 53 of the base plate 5 flows through the opening 71 between the dam member 72 (see FIG. 3 ) at the center of the lip 7 of the showerhead assembly 60 and the annular body portion 70 of the lip 7, and then Flow out from the recess 73 or slot between the lip 7 and the cover plate 6 for distribution onto the surface of the workpiece or substrate.
  • FIG. 8 is an oblique front exploded view showing a portion of a dispensing system according to the present invention.
  • the showerhead assembly 60 is in fluid communication with the metering assembly 3 .
  • the output side clearance of the gear set of the metering assembly 3 is aligned with the inlet of the vertical flow channel 52 of the base plate 5 , whereby the fluid material from the gear set of the metering assembly 3 can flow into the base plate flow channel of the base plate 5 .
  • the bottom plate 5 may be a substantially rectangular plate, in which case, both the vertical flow channels 52 and the horizontal flow channels 53 of the bottom plate 5 are formed inside the body of the rectangular bottom plate 5 . However, the bottom plate 5 may have protrusions 54 protruding from the bottom surface 56 .
  • a vertical flow channel 52 extends downward from the top surface 55 of the bottom plate 5 into the protrusion 54, and a horizontal flow channel 53 can be provided in the protrusion 54 to be in fluid communication with the vertical flow channel 52 (as shown in FIG. 7 ). Show). With this protruding portion 54 , the entire thickness of the bottom plate 5 can be appropriately reduced, thereby reducing the weight of the bottom plate 5 .
  • the protrusion 54 has an engaging surface 541, preferably a plane.
  • the outlet of the horizontal flow channel 53 is provided in the protrusion 54 , particularly on the joint surface 541 .
  • This joint surface 541 of the base plate 5 of the metering assembly 3 is adapted to be connected to the corresponding surface of the lip 7 of the spray head assembly 60 .
  • the vertical flow channels 52 and the horizontal flow channels 53 may have various cross-sectional shapes, for example, circular cross-sectional shapes.
  • the horizontal flow channel 53 may have a flat mouth-shaped section, in other words, its section has a slot shape.
  • the bottom plate flow channels of the bottom plate 5 are not limited to the vertical flow channels 52 and the horizontal flow channels 53, but may have other forms of flow channels. For example, additional flow channels may be provided between the vertical flow channels 52 and the horizontal flow channels 53 .
  • the base plate 5 preferably has a sealing groove 51 on the top surface 55 .
  • a seal groove corresponding to this seal groove 51 is located on the bottom surface of the gear support plate 4.
  • the sealing groove 51 and its corresponding sealing groove together form an accommodating space, and a sealing member is arranged inside the accommodating space.
  • a sealing member surrounds the interior space of the metering assembly 3 to achieve fluid tightness.
  • the lip 7 of the showerhead assembly 60 may be directly connected to the base plate 5 of the metering assembly 3 such that the top edge of the dam member 72 is higher than the outlet of the horizontal flow channel 53 and the opening 71 is in fluid communication with the outlet of the horizontal flow channel 53 .
  • Said opening 71 is in fluid communication with the horizontal flow channel 53 via a collecting groove 722 (see FIG. 3 ) of the lip 7 on the side opposite the cover plate 6 or facing the bottom plate 5 .
  • Various configurations of fluid communication between the opening 71 and the outlet of the horizontal flow channel 53 are contemplated.
  • the cover plate 6 is connected to the lip 7 on the opposite side of the lip 7 from the bottom plate 5 .
  • a seal 8 is provided between the lip 7 and the bottom plate 5 .
  • the depth of the gathering groove 722 may be zero.
  • the seal 8 has a central opening 81 which is substantially rectangular in shape.
  • the main dimensions of the central opening 81 and the rectangular opening 71 are different. Specifically, the width of the central opening 81 is greater than or equal to the width of the rectangular opening 71 , and the height of the central opening 81 is greater than or equal to the distance from the top edge of the rectangular opening 71 to the bottom edge of the outlet of the horizontal flow channel 53 of the plate 5 .
  • Both the lip 7 and the cover plate 6 can be screwed to the base plate 5 via seals 8 .
  • the screws pass through the cover plate 6, the lip 7, the seal 8 and the corresponding screw holes on the bottom plate 5 in sequence from one side of the cover plate 6, thereby connecting and fixing these components together.
  • the fluid such as liquid glue from the horizontal flow channel 53 of the bottom plate 5 first reaches the backside of the dam member 72 and is blocked by the backside.
  • the liquid glue then rises along this backside of the dam member 72, and when the liquid glue rises to the top edge of the dam member 72, the liquid glue begins to pass over the top edge of the dam member 72, through the opening 71 and into the cover plate 6
  • the space between the lip sheet 7 and the lip sheet 7 is the gathering groove 721 , and finally flows out of the nozzle assembly through the concave portion 73 .
  • the flow path of the fluid material is generally indicated by the arrows in FIG. 8 .
  • Figure 9 shows an oblique rear exploded view of a portion of the dispensing system.
  • the lip 7 may be in planar contact with the seal 8.
  • the outer edge of the surface of the lip 7 on the side opposite to the cover plate 6, ie on the side to which the seal 8 is connected may be provided with bosses 74, thereby forming recesses For receiving seal 8.
  • the boss 74 limits the movement of the seal 8 .
  • the height of the boss is preferably less than or equal to about 60% of the thickness of the sealing member 8 to avoid interference between the boss 74 and the mounting surface 541 of the bottom plate 5 after the sealing member 8 is compressed.
  • the bottom edge of the collecting groove 722 is aligned with the bottom edge of the outlet of the horizontal flow channel 53 of the bottom plate 5 or has the same height.
  • the components of the dispensing system may be formed from the same material.
  • the components may be made of aluminum alloys.
  • weight-reducing holes can be provided on this part to reduce the overall weight of the system.
  • the assembly of the dispensing system of the present invention is described below.
  • the distribution system can be divided into a plurality of subsystems, and the distribution system is obtained by assembling the subsystems.
  • the lip 7 and the cover plate 6 are fixed together with screws to form the nozzle assembly 60, that is, the first subsystem; the gear set, the gear support plate 4, the bottom 5 and the top plate 2 are fixed together to form the metering assembly 3
  • the second subsystem assemble the fluid supply assembly including the delivery container 9, namely the third subsystem; turn the first to third subsystems together; assemble the drive means such as the motor 1 to the metering assembly 3, thereby forming the entire distribution system. It is easy to understand that the above assembly steps are not fixed, but can be freely changed in an appropriate manner.
  • the fluid flowing from the glue tank or hose enters the delivery container 9 of the fluid supply assembly.
  • a fluid such as liquid glue enters into the flow channel of the top plate 2 of the metering assembly 3 and then into the inlet side clearance of the gear set.
  • the fluid is conveyed by the gear set of the metering assembly 3 into the gap on the outlet side of the gear set, and thus into the base plate 5 .
  • the liquid glue flowing from the bottom plate 5 passes through the seal 8 and is blocked by the dam member 72 of the lip 7 to rise.
  • the dispensing system utilizes a slit nozzle or a nozzle scraper to dispense an extremely thin liquid glue with a predetermined width on the target substrate.
  • the dispensing system of the present invention which may also be referred to as a belt applicator, incorporates a uniquely designed slot nozzle assembly or spray head assembly.
  • the design concept of the nozzle assembly and/or the distribution system of the present invention is significantly different from any previous design of the slit coating nozzle.
  • the dispensing system of the utility model integrates a precision metering pump and a slit nozzle, which realizes high-precision coating performance, provides a variety of hot liquid glue supplies, provides various types of liquid glue patterns, and provides friendly The man-machine interface interaction is perfect, and the spare parts are reliable and durable, and the maintenance is convenient.
  • the distribution system of the present invention supports high-speed production lines of automated production lines.
  • the dispensing system of the present invention is suitable for coating the surface of a sheet-type battery, an electrode sheet used for manufacturing an electrode of the sheet-type battery, and the like.
  • the sheet-type battery is preferably a battery for powering an electric vehicle.
  • Power batteries for electric vehicles usually take the form of lithium-ion batteries.
  • the cathode of a lithium ion battery is made of aluminum sheet and the anode is made of copper sheet.
  • FIG. 10 is a perspective view of an electrode sheet for producing an electrode of a battery cell.
  • Power batteries for electric vehicles are usually formed by laminating a plurality of sheet battery cells together. Electrodes such as cathodes and anodes of each unit cell are formed by cutting electrode sheets and laminating the cut sheet sections together.
  • an electrode sheet 10 for producing electrodes for battery cells has a long strip shape, and is usually wound on a reel to form a reel.
  • the electrode sheet 10 has a thick body portion 101 and a thin edge portion 102 .
  • the edge portion 102 has, for example, a thickness of several tens of micrometers.
  • the edge portion 102 is located on one side in the width direction of the body portion 101 .
  • Steps 103 are respectively formed on the upper and lower sides at the connection portion between the body portion 101 and the edge portion 102 .
  • the body portion 101 and the edge portion 102 respectively have a rectangular cross section.
  • the surface of the body portion 101 typically already has a coating to prevent corrosion.
  • the edge portion 102 is typically bare or taped to facilitate further die cutting.
  • FIG. 11 is a perspective view of a strip of electrode sheet obtained after the electrode sheet is die-cut in the prior art.
  • an electrode sheet 10 as shown in FIG. 10 is typically die-cut by a die-cutting machine.
  • the electrode sheet 10 is driven by a drive roller to pass through a die-cutting machine, and the die-cutting machine performs die-cutting, such as laser die-cutting, on the electrode sheet 10 .
  • a die-cutting path is formed on the edge portion 102 of the electrode sheet 10 along the length of the electrode sheet 10, and the die-cutting path is generally not a straight line.
  • a plurality of ear portions 1021 are formed on the edge portion 102 at uniform intervals.
  • the plurality of ear portions 1021 are formed by die-cutting a portion of the edge portion 102, ie, a cut-out portion (1022, see FIG. 12). After die-cutting, the die-cut electrode sheet strip 10' is cut along the cutting line L in the width direction of the sheet strip to form a plurality of sheet sections. Then, the plurality of sheet sections are laminated together to form the electrodes of the sheet battery.
  • the body portion 101 is coated with a coating, and the edge portion 102 can be covered with a layer of adhesive tape to protect the entire electrode sheet 10 .
  • the obtained ear portion remains partially exposed, for example, at least the outer edge of the ear portion 1021 is exposed, and the electrodes of the battery cells are formed in this state.
  • the electrode is directly immersed in the electrolyte. As a result, the produced battery may short-circuit and thereby cause a fire. This creates a big security risk.
  • the entire surface of the electrode sheet especially the edge portion including the ear portion, needs to be coated, and considering the requirement for a lower coating mass ratio, the surface of the electrode sheet needs to be coated with a layer of Very thin coating.
  • a new conductive glue that mixes electrode materials with conductive binders was created.
  • the glue is applied in a very thin layer to the edges of the electrode sheet to provide protection while the electrodes conduct electricity.
  • the thickness of the coating or primer must be strictly controlled. The thickness needs to be controlled to be less than 30 ⁇ m, preferably less than 20 ⁇ m.
  • the showerhead assembly according to the present invention and the dispensing system incorporating the same are able to dispense an extremely thin layer of fluid by allowing the recess 73 of the showerhead assembly to have an extremely small recessed depth, thereby solving the aforementioned problems.
  • a method of dispensing fluid on a substrate having thinner portions using a dispensing system includes the steps of using the dispensing system to dispense fluid onto a thinner portion of the substrate. Thereby, an extremely thin (less than 20 ⁇ m) fluid layer is obtained on the thinner part.
  • the substrate may be, for example, a sheet used to manufacture electrodes of a sheet battery.
  • FIG 12 is a perspective view showing the electrode sheet strip obtained after being die cut according to the new cutting process.
  • the electrode sheet 10 which is a cathode sheet or an anode sheet
  • the electrode sheet 10 is fed into a die-cutting machine to die-cut the electrode sheet into narrow strips suitable for electrodes of various sizes, that is, electrode sheets Timber strip 10'.
  • the electrode sheet strip 10' of the portion 1021 is then cut transversely to the region of the electrode sheet strip 10' that includes the at least one electrode ear portion 1021 to obtain a plurality of sheet sections of the same size.
  • the edge portion 102 of the electrode sheet 10 has a very thin thickness, and when the electrode sheet is die-cut, the edge portion 102 is usually exposed or the coating area of the electrode sheet 10, that is, the body portion 101 White flat tape is affixed between the blank area, the edge portion 102, and the electrodes thus formed are at least partially exposed. This poses a certain safety hazard to the battery.
  • the dispensing system according to the present invention it is possible to dispense an extremely thin layer of fluid on the die cut edge portion 102, thereby forming an extremely thin coating.
  • the thickness of the coating is usually less than 20 ⁇ m. Due to the extremely thin coating, the coating quality is kept small while protecting the edges.
  • the electrode ear portion 1021 is trapezoidal, and the outer edge (or the die-cutting path) of the die-cut edge portion 102 is not a straight line. Therefore, if a fluid such as liquid glue is directly applied to the surface of the die-cut electrode sheet, such as the surface of the edge portion 102, since the width of the nozzle edge remains unchanged, the liquid glue will obviously stick to the surface for conveying the electrode sheet. on the conveyor rollers, thereby contaminating the die-cutting machine. Moreover, the existing trough dispenser cannot dispense the glue to directly wrap the outer slit edge of the electrode sheet strip due to the thick glue layer being sprayed.
  • a fluid such as liquid glue
  • the outer edges of the electrode sheet strip 10' also need to be glued before the electrode sheet strip 10' is further cut into sheet sections for forming the final electrodes. That is, the electrode ears of the electrode sheet strip 10' also need to be adequately protected before the sheet sections are formed. If glue is applied directly to the slit-like outer edge of the electrode sheet strip, the outer edge is too thin to effectively glue directly along the entire corner.
  • the present invention a completely new type of sheet die cutting and sizing edge sealing process is provided, wherein once the electrode sheet is die cut, the fluid dispensing step is employed immediately.
  • the electrode sheet 10 is die-cut, the trimmings of the electrode sheet, that is, the cut-out portion 1022 are not completely removed.
  • the die cutter starts the die cutting at a distance from the leading end 104 of the electrode sheet.
  • the die-cutting machine ends the die-cutting at a distance from the trailing end 105 of the electrode sheet. That is, the die cut path does not extend the entire length of the electrode sheet 10 .
  • the edge material to be removed of the electrode sheet that is, the cut-out portion 1022 is not removed during die-cutting, thereby forming an integrated electrode sheet strip 10 including a sheet material body and a cut-out portion. '.
  • the sheet body includes at least the body portion 101 and the ear portion 1021 .
  • the cut portion of the electrode sheet is directly peeled off from the main body of the electrode sheet.
  • the continuous die-cut slot holes 1023 are cut on the electrode sheet 10 toward the feeding direction, after die-cutting or conveyed to the The electrode sheet strip 10' of the gluing system is still a single piece, which includes the cutout 1022 to be removed.
  • FIG. 13 is a schematic diagram showing the working principle of the combination of the dispensing system and the new die cutting process according to the present invention.
  • the electrode sheet strip 10 ′ obtained after die-cutting still has the edge material, namely the cut-out portion 1022 and the sheet material body as an integral part, which is then placed under the showerhead assembly 60 according to the present invention delivery.
  • the dispensing system continues to spray a fluid, such as liquid glue, evenly on the edge portion 102 of the sheet.
  • a fluid such as liquid glue
  • the edge portion 102 is coated with a fluid, such as liquid glue, there will be a thin layer of fluid in the die cut slot 1023 on the edge portion 102.
  • the showerhead assembly 60 is placed in close proximity to the substrate surface, i.e., the edge portion 102 of the electrode sheet strip 10' At the same time, due to the gravity of the fluid, the fluid must drop down into the die-cutting slot hole 1023 and may penetrate the die-cutting slot hole 1023 . Due to this reaction, the fluid gradually wraps around the opposite sides of the die-cut slot 1023 .
  • the same treatment can be performed on the other surface of the electrode sheet strip 10'.
  • the useless narrow trim, the cutout 1022 will peel off from the body of the sheet.
  • the outer cutting edge includes the outer edge of the ears 1021 and the outer edge between the ears 1021 .
  • the existing die-cutting process directly uses a laser to continuously cut the electrode sheet in the shape of the electrode ears.
  • a brand-new electrode ear die-cutting and coating process especially an edge-sealing process, is provided, thereby facilitating the provision of a new battery cell manufacturing technology, which can improve the energy of electric vehicle batteries density and reduce safety hazards.
  • the technology described in this application is to add a dispensing system such as a glue head in the die-cutting process.
  • a glue head such as a glue head in the die-cutting process.
  • the new process requirements not only is it possible to scrape a very thin special glue such as conductive glue on the sheet surface of the electrode ear, but also The outer edges of the electrode sheet strips obtained after die-cutting are protected by edge sealing such as gluing.
  • a new glue that mixes the electrode material and the conductive adhesive is formed in a specific way.
  • the glue is conductive and is applied in a very thin layer to the surface of the electrode sheet.
  • the coating thickness can be controlled to be between 20-30 ⁇ m or even thinner. Thereby, a small coating quality is achieved while effectively protecting the electrode ears.
  • the size of the die-cutting slot 1023 of the sheet can be optimized according to actual needs, so as to obtain the best edge sealing effect.
  • the size of the die-cutting slot hole 1023 may be determined according to the thickness of the edge portion, the application temperature of the fluid, the sheet conveying speed, and the like.
  • the dispensing system can be mounted directly on the die cutter, or separately located in front of the die cutter. Thereby, the sheet can be glued on the surface as well as the sides after die cutting. This provides a new method of gluing the outer edges of the electrode ears of the electrode sheet of the lithium ion battery, which is completely different from the existing gluing method.
  • the coating process can be performed directly on the electrode sheet strip shown in FIG. 11 using a showerhead assembly and/or dispensing system according to the present invention. In this case, it is necessary to strictly control the amount of glue and the coating speed to avoid contamination of the transfer roller as much as possible.
  • a separate gluing process may be performed to protect the surface of the step.
  • the width of the nozzle edge of the nozzle assembly can be selected and kept constant, so that when dispensing fluid onto the substrate, the gluing width can be kept consistent, and by setting/selecting the recess of the recess 73 of the nozzle assembly Into depth, glue thicknesses of less than 30 microns, preferably 20 microns, are achieved.
  • a strip coating distribution system combined with the improvement of the electrode sheet manufacturing process is obtained, which will provide the best equipment and technical solutions, not only in the production of electrode sheets for sheet electrodes
  • a very thin layer of adhesive less than 30 ⁇ m, preferably less than 20 ⁇ m, is precisely and uniformly applied, and the outer edge of the sheet can be completely sealed.
  • the utility model also relates to an electrode sheet strip.
  • the electrode sheet strip is obtained by the novel die-cutting and edge-sealing process described above.
  • the present invention also relates to an electrode of a sheet battery, which comprises a plurality of electrode segments, which are manufactured from the strips of electrode sheet obtained according to the above-mentioned process. A plurality of electrode segments are laminated together to form the electrode.
  • the present invention also relates to a sheet battery comprising electrodes obtained by laminating together the electrode segments obtained according to the above method. The performance and safety of electric vehicles equipped with such batteries can be greatly improved.

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Abstract

一种喷头组件(60)以及具有喷头组件(60)的分配系统，喷头组件(60)包括：唇片(7)，所述唇片(7)被构造成具有环形的本体部(70)和中央处的坝构件(72)；盖板(6)，所述盖板(6)被构造成连接到所述唇片(7)，其中，所述坝构件(72)相对于所述唇片(7)的与所述盖板(6)连接的表面凹进使得所述盖板(6)与所述坝构件(72)之间形成聚集槽(721)，所述聚集槽(721)与所述矩形开口(71)流体连通，并且在所述盖板(6)和所述唇片(7)的彼此面对的两个表面中的一个表面上设置有凹部(73)，所述凹部(73)与所述聚集槽(721)流体连通从而流体能够以带状从所述聚集槽(721)经由所述凹部(73)流出。还公开了一种电机片材条带（10 ，）以及由该电机片材条带（10 ，）制造的电极，电机片材条带（10 ，）根据上述分配系统将流体分配到电极片材边缘部的表面上而制得。

Description

喷头组件、分配系统、电极片材条带以及电极 技术领域
本申请涉及一种喷头组件、分配系统、电极片材条带以及电极。
背景技术
电动汽车是当前汽车技术的一个发展方向。续航能力是表征电动汽车的性能的一个重要参数。续航能力主要地取决于电动汽车电池的性能。锂离子电池例如所谓的片式电池是电池研究的一个非常重要的方向。通常，电动汽车的锂离子电池尤是片式电池，其具有铝制外壳，电芯容纳在该外壳内部。多个锂离子电池并排在一起形成一个电池组。锂离子电池之间需要进行绝缘处理，同时追求尽可能低的涂层重量。
进一步，正常情况下，锂电池在充电时，锂离子从正极脱嵌并嵌入负极；而在过充、低温或者强电流等非正常情况下，从正极脱嵌的锂离子会在负极出现嵌入异常的情况，锂离子就只能析出在负极表面。这被称为析锂。如果发生析锂现象，锂离子会在负极表面还原成不同形态的金属锂，其中有一种形态叫锂枝晶，它会随着析锂现象像树枝一样不断生长且这一过程不可逆；当锂枝晶长到一定长度时，会穿破正负极间的隔膜，导致电芯的内部短路，极有可能引发热失控乃至爆炸，这是非常危险的。
相应地，需要在电池表面上涂覆非常薄的粘合材料。通常，要求能够在其电池的电极片上均匀地涂上大于10mm(宽)和小于20μm(厚)的热粘合材料，这对于提高汽车电池的可靠性来说非常重要。热胶必须是极薄地且均匀地包覆在电极片的表面上。并且，用于形成电极的电极区段通常通过切割电极片材来形成，而在切割电极片材以形成电极区段之前尤其是在模切时电极片材的外侧边缘也需要被保护。这对现有涂胶产品显然是一个严峻的挑战。当前的方法和产品难于在电极片材上实现均匀的小于20μm的胶厚度，并且难于对用于形成阴极的阴 极区段的整个表面进行涂胶。
由此，存在对涂布设备或分配系统，以及涂胶方法的改进的需求。
实用新型内容
本实用新型的目的在于提供一种喷头组件，该喷头组件能够以较高精度喷涂布流体例如胶水尤其是聚氨酯液态胶，从而实现极薄的胶层。进一步，本实用新型还提供一种包括分配系统、电极片材条带以及电极。
根据本实用新型，提供一种喷头组件，其特征在于包括：唇片，所述唇片被构造成具有环形的本体部和中央处的坝构件，所述坝构件从所述本体部包围的矩形空间的底部边缘朝向顶部边缘延伸使得所述坝构件的顶部边缘与所述矩形空间的顶部边缘之间形成矩形开口，所述坝构件在所述唇片的横向方向上延伸所述矩形开口的整个宽度，所述矩形开口适于接收流体；和盖板，所述盖板被构造成连接到所述唇片，其中，所述坝构件相对于所述唇片的与所述盖板连接的表面凹进使得所述盖板与所述坝构件之间形成聚集槽，所述聚集槽与所述矩形开口流体连通，并且在所述盖板和所述唇片的彼此面对的两个表面中的一个表面上设置有凹部，所述凹部与所述聚集槽流体连通从而流体能够以带状从所述聚集槽经由所述凹部流出。
以此方式，能够精确、稳定地控制从凹部分配的流体的厚度和宽度，从而能够在基板/工件上获得期望厚度的、尤其是极薄的涂层。
优选地，所述凹部设置在所述唇片的面对所述盖板的表面上。由此，能够以简单、高效的方式制造凹部。并且，优选地，在所述横向方向上，所述凹部的宽度小于或等于所述坝构件的宽度，从而流体能够均匀地以带状从所述空间经由所述凹部流出。
优选地，所述凹部具有相对于设置有所述凹部的表面的一致的凹进深度并且所述凹进深度为50μm至150μm。由此，能够在基板表面涂覆极薄的胶层。
优选地，所述坝构件相对于所述唇片的与所述盖板相反的一侧上的表面凹进。
优选地，所述唇片在与所述密封件连接的一侧上的外沿设置有凸台，用以限制所述密封件的移动。
优选地，所述盖板和/或所述唇片的底表面上设置有导向凸台。
优选地，所述盖板和所述唇片依次由螺钉固定到一起。由此，能够实现简单的组装。
根据本实用新型，还提供一种分配系统，其特征在于包括：流体供应组件；计量组件，所述计量组件具有容积泵的形式并且被构造成与所述流体供应组件流体连通以接收来自所述流体供应组件的流体；和喷头组件，所述喷头组件与所述计量组件流体连通以接收来自所述计量组件的流体，其中，所述喷头组件是根据上述权利要求中的任一项所述的喷头组件。
优选地，所述流体供应组件包括输送容器。所述输送容器被构造成容纳有胶罐，或被构造成与供给胶的管相连接。
优选地，所述计量组件包括主动齿轮和从动齿轮。所述主动齿轮由马达驱动。
优选地，所述计量组件包括：顶板，所述顶板具有顶板流道用于接收来自流体供应组件的流体；底板，所述底板具有底板流道，所述 底板流道与所述喷头组件的矩形开口流体连通；和齿轮支撑板，所述齿轮支撑板位于所述顶板和所述底板之间，并且所述齿轮支撑板具有位于中央部处的孔口，用于容纳所述主动齿轮和从动齿轮。
优选地，所述主动齿轮和从动齿轮的各自的齿轮轴插入到所述底板的对应孔中，以提供对所述齿轮轴的定位
优选地，所述主动齿轮和所述从动齿轮之间的在所述计量组件的一侧上的间隙与所述顶板的顶板流道流体连通，并且所述主动齿轮和所述从动齿轮之间的在所述计量组件的另一侧上的间隙与所述底板的底板流道流体连通。
优选地，在所述齿轮支撑板和所述底板之间设置有密封构件，所述密封构件包围所述齿轮支撑板中的孔口。
优选地，所述喷头组件的唇片连接到所述底板使得所述坝构件的顶部边缘高于所述底板流道的出口。
优选地，在所述唇片和所述底板之间设置有密封件，所述密封件具有矩形的中央开口。所述中央开口的宽度大于或等于所述矩形开口的宽度，且所述中央开口的高度大于或等于从所述矩形开口的顶部边缘到所述底板的底板流道的出口的底部边缘的距离。
优选地，所述底板具有突起部，所述底板的底板流道的出口设置在所述突起部中，所述突起部适于被连接到所述唇片。
本申请还涉及一种使用所述的分配系统将流体分配到基板上的方法，所述基板具有较薄的部分，其特征在于，所述方法包括如下步骤：使用所述分配系统将流体分配到所述基板的较薄的部分上。
优选地，所述基板是用于制造电池的电极的电极片材，所述电极片材具有较厚的本体部和较薄的边缘部，所述边缘部位于所述本体部的一侧上并与所述本体部连续，所述方法包括如下步骤：使用所述分配系统将流体分配到所述边缘部的表面上，以生产电极片材条带。电池可以是片式电池。
优选地，所述方法包括：将所述电极片材输送到模切机，并且利用所述模切机对所述边缘部沿模切路径进行模切；和在模切之后，使用所述分配系统将流体分配到所述边缘部的表面上。
优选地，所述模切机从距离所述电极片材的先端隔开一定距离处开始模切，并且从距离所述电极片材的尾端隔开一定距离处结束所述模切。
优选地，将所述电极片材的所述边缘部模切成使得所述边缘部上的模切槽孔的宽度适于使得来自所述分配系统的流体完全渗透所述模切槽孔。
优选地，根据所述边缘部的厚度、流体的涂布温度和/或片材输送速度来确定所述模切槽孔的宽度。
优选地，所述模切路径是非直线的。
优选地，边缘部被模切成沿着所述模切路径形成多个电极耳部。电极耳部优选是梯形的。
本申请还提供一种电极片材条带，所述电极片材条带用于制造电池的电极，其特征在于，使用所述的方法来制造所述电极片材条带。
优选地，所述电极片材条带沿宽度方向被切割成形状相同的多个 片材区段，所述多个片材区段被层压在一起来构成所述电极。
本申请还提供一种电极，其特征在于，所述电极由所述的电极片材条带来制造。
优选地，所述电极是电池的阳极或阴极。
本实用新型的喷涂组件以及分配系统能够实现极薄的胶厚度，例如小于20μm，由此能够满足电动汽车的片式电池表面的喷涂要求。本申请所描述的方法能够对片式电池的电极耳部的外侧边缘进行涂胶以实现保护。
附图说明
本实用新型的这些和其它目的以及优点从结合附图的以下描述将更完全地体现出来，其中所有附图中用相同的附图标记表示相同的或相似的部件，且其中：
图1是示出根据本实用新型的喷头组件的斜前分解视图。
图2是示出根据本实用新型的喷头组件的斜后分解视图。
图3是示出根据本实用新型的喷头组件的沿着图2中的线III-III截取的截面图。
图4示出了根据本实用新型的喷头组件的侧视图。
图5示出了根据本实用新型的喷头组件的正视图。
图6是示出了包括根据本实用新型的喷头组件的一种分配系统的分解图；
图7是示出分配系统的截面图；和
图8是示出了分配系统的一部分的斜前分解图。
图9是示出了分配系统的一部分的斜后分解图。
图10是用于生产电池单体的电极的电极片材的立体图。
图11是现有技术中电极片材被模切后获得的电极片材条带的立体图。
图12是示出了电极片材根据新模切工艺被模切后获得的电极片材条带的立体图。
图13是示出了根据本实用新型的分配系统和新模切工艺相组合的工作原理的示意图。
具体实施方式
将在下文中参考附图详细地描述根据本实用新型的实施例。在附图说明中，相同或者相应的部分由相同的数字和符号表示，并且将省略重复的说明。以下描述中，表示方向的术语“上”、“下”、“前”、“后”、“顶”和“底”等仅用于描述附图，而不构成对本实用新型的实质性限定。
图1是示出根据本实用新型的喷头组件的斜前分解视图。如图1所示，喷头组件60主要包括唇片7和盖板6。所述唇片7是大致矩形板状的，并且具有环形的本体部70和中央处的坝构件72，所述坝构件72从所述本体部70包围的矩形空间的底部边缘朝向顶部边缘延伸使得所述坝构件72的顶部边缘与所述矩形空间的顶部边缘之间形成矩形开口71。坝构件72在所述唇片7的横向方向上延伸所述矩形开口71的整个宽度。所述唇片7的横向方向与所述矩形开口71的横向方向相同。矩形开口71适于接收流体。例如，矩形开口71能够连接到流体供应源、与流体供应源连接的计量组件等。
所述盖板6被构造成连接到所述唇片7。盖板6的前表面是平面，并且后表面用于与唇片7相连接。所述坝构件72相对于所述唇片7的与所述盖板6连接的表面即前表面凹进一定深度使得所述盖板6与所述坝构件72之间形成聚集槽721(请见图3)，所述聚集槽721与所述矩形开口71流体连通。在所述盖板6和所述唇片7的彼此面对的两个表面中的一个表面上设置有凹部73，所述凹部73在所述唇片7的横向方向上的宽度显著大于其深度。所述凹部73与所述聚集槽721流体连通从而流体能够以带状从所述聚集槽721经由所述凹部73流出。例 如如图1和3所示，在所述唇片7的面对所述盖板6的表面即前表面上设置有所述凹部73，并且在横向方向上所述凹部73的宽度小于或等于所述坝构件72的宽度。在唇片7的横向方向上，所述坝构件72的宽度等于矩形开口71的宽度。
所述凹部73相对于设置有所述凹部73的所述表面凹进50μm至150μm。所述凹部73的凹进深度优选是一致的。
并且，例如如图3清楚所示，所述坝构件72相对于所述唇片7的面对所述盖板6的表面，即前表面凹进一致的深度。然而，坝构件72的构造不限于此，而是可以从坝构件72的底部朝向顶部向后倾斜地延伸。
图2是示出根据本实用新型的喷头组件的斜后分解视图。如图2所示，盖板6的背面，即盖板6的与唇片7相连接的表面优选是平面。
图3是示出根据本实用新型的喷头组件的沿着图2中的线III-III截取的截面图。如图3所示，优选地或者附加地，所述坝构件72相对于所述唇片7的在与所述盖板6相反的一侧上的表面即背面凹进，从而在坝构件72的与所述盖板6相反的一侧上形成用作聚集槽722的空间。容易理解的是，该聚集槽722凹进的深度可以为0，即不设置该聚集槽722。
所述唇片7在与所述盖板6相反的一侧上的外沿优选设置有凸台74，用以接收密封构件并且限制所述密封构件的移动。所述盖板6和所述唇片7例如由螺钉固定到一起。
坝构件72的厚度在此没有具体限定，通常该厚度小于唇片7的厚度。坝构件72的厚度和在两侧上的凹进深度可以根据具体的涂布要求来确定。如图3所示，在坝构件72的面向盖板6的一侧上，坝构件72 的底部边缘与凹部73的顶部边缘平缓过渡，以便于流体材料的流动。聚集槽721的凹进深度没有特别限定。例如，聚集槽721的凹进深度大致等于开口71的高度。聚集槽722的凹进深度小于等于开口71的高度，换言之，聚集槽722的深度小于或等于开口71的顶部边缘到其底部边缘的距离。所述唇片7与所述盖板6具有大致相同的厚度。所述唇片7与所述盖板6具有大致相同的横向截面外轮廓。
图4示出了根据本实用新型的喷头组件的侧视图。如图4所示，优选地，盖板6和唇片7面对待涂覆工件的表面即底面可以分别具有导向凸台65和75，且在装配后，盖板6和唇片7的等高度、平面度、粗糙度等非常小，进而避免工作状态中划伤、划破待涂覆的工件的表面。
图5示出了根据本实用新型的喷头组件的正视图。如图5所示，盖板6的导向凸台65的底面带有台阶651。然而，能够构思的是，盖板6及唇片7的底面上的导向凸台可以为平面，替代地或者附加地也可以带有台阶，并且台阶可以在任意位置，具有任意长度及高度。台阶的具体尺寸可以根据实际喷涂要求来确定。
图6是示出了根据本实用新型的包括喷头组件的分配系统的分解图。如图6所示，分配系统包括流体供应组件、计量组件3和喷头组件60。然而，能够理解的是，流体供应组件和/或计量组件3并不是必需的，而是喷头组件60可以直接连接到流体供应源。流体供应组件包括输送容器9。输送容器9可以在内部容纳有各种规格的胶罐，例如300cc的胶罐。适于分配的流体材料不限于液态胶，而是可以是喷涂工艺中的多种其他流体材料。液态胶可以是绝缘液态胶或者导电液态胶。通常，导电液态胶中含有导电物质，以便于在涂覆于工件表面上之后进行导电。替代使用胶罐，输送容器9可以连接到软管或其他连接管。该软管或其他连接管直接与另外的计量系统和/或流体源相连接。在本实用新型中，如果采用软管连接，则截止控制模块必须设置在流体开 始流入计量组件3的位置。
计量组件3是一种集成式的计量系统，并且具有容积泵的形式。容积泵可以具有多种构造。所述计量组件3被构造成与所述输送容器9流体连通以接收来自所述输送容器9的流体。如图6所示，例如，计量组件3主要包括一对齿轮组，即主动齿轮31和从动齿轮32。该主动齿轮由驱动装置例如马达1驱动。马达1例如是伺服马达。主动齿轮31和从动齿轮32构成一对微型齿轮组，其能够输送流体。
计量组件3还包括：顶板2，所述顶板2具有顶板流道用于接收来自输送容器9的流体；底板5，所述底板具有底板流道，所述底板流道与所述喷头组件60例如喷头组件60的矩形开口71流体连通；齿轮支撑板4，所述齿轮支撑板4位于所述顶板2和所述底板5之间。所述齿轮支撑板4具有位于中央部处的孔口，用于容纳所述主动齿轮31和从动齿轮32。即由主动齿轮31和从动齿轮32构造成的微型齿轮组设置在齿轮支撑板4中，由此构成了内部计量泵。
所述主动齿轮31和所述从动齿轮32之间的在所述计量组件3的一侧上的间隙与所述顶板2的顶板流道流体连通，并且所述主动齿轮31和所述从动齿轮32之间的在所述计量组件3的另一侧上的间隙与所述底板5的底板流道流体连通。由此，流体能够从所述顶板2经由齿轮组流入底板5中。
优选地，在所述齿轮支撑板4和所述底板5之间设置有密封件，所述密封件包围所述齿轮支撑板4中的所述孔口。所述喷头组件60的唇片7连接到所述底板5使得所述坝构件72的顶部边缘高于所述底板流道的出口。
由此，利用该计量泵，流体诸如热胶可以准确、充分地输送到喷头组件。具体地，该计量泵即计量组件3的内部空间与输送容器9流 体连通，由此能够接收来自输送容器9的流体材料。所述喷头组件60与所述计量组件3流体连通，由此能够接收来自计量组件3的流体材料。流体材料能够依次经过流体供应组件具体地输送容器9、计量组件3、唇片7中的开口71，然后经过唇片7和盖板6之间的凹部73以准确的量流出该喷头组件。
输送容器9可以通过多种方式来与计量组件3固定到一起并且流体连通。优选地，输送容器9直接设置在计量组件3的顶板2上并且与顶板2中的顶板流道流体连通。用于驱动计量组件3的驱动装置例如马达1和输送容器9并排设置在顶板2上。来自输送容器9的流体材料经由顶板2中的顶板流道流入到计量组件3中。
计量组件3的主动齿轮31的齿轮轴33和从动齿轮32的齿轮轴34(结合图8-9)贯穿齿轮支撑板4然后在两端分别插入到顶板2以及底板5中。马达1和齿轮组分别布置在顶板2的相反两侧上。主动齿轮31的齿轮轴33与马达1的输出轴(未示出)穿过设置在顶板2中的通孔驱动连接。从动齿轮32的齿轮轴34的两端分别插入到设置在顶板2中的孔中以及设置在底板5中的孔中。由此，从动齿轮32的齿轮轴34一方面支撑从动齿轮32，另一方面实现了对齿轮组的定位。顶板2、齿轮支撑板4以及底板5优选通过螺钉固定到一起。
分配系统还包括控制组件11，以控制该分配系统的运行。控制组件11可以固定到输送容器9的壳体上，例如在输送容器9的与马达1相反的一侧上固定连接到该输送容器9。
图7是示出根据本实用新型的分配系统的截面图。图7示出了流体材料在分配系统内部的流动路径。具体地，如图7所示，来自输送容器9的流体材料经由输送容器9的出口流入到计量组件3的顶板2的顶板流道中。顶板2例如在内部依次包括竖直流道21、水平流道22和竖直流道23，这些流道依次流体连通并且对应于顶板流道。来自输 送容器9的流体材料进入顶板2的竖直流道21中，然后流过水平流道22和竖直流道23。来自顶板2的竖直流道23的流体材料进入到计量组件3的输入侧间隙中，然后在齿轮副即主动齿轮31和从动齿轮32的带动下进入到计量组件3的输出侧间隙中。来自计量组件3的输出侧间隙的流体材料流入到计量组件3的底板5的底板流道中，具体地首先进入底板5的竖直流道52中，然后进入水平流道53中。来自底板5的水平流道53的流体材料流过喷头组件60的唇片7的中央处的坝构件72(请见图3)与唇片7的环形的本体部70之间的开口71，然后从唇片7和盖板6之间的凹部73或狭槽流出，以便分配到工件或基板的表面上。
图8是示出根据本实用新型的分配系统的一部分的斜前分解图。如图8所示，喷头组件60与计量组件3流体连通。该计量组件3的齿轮组的输出侧间隙与底板5的竖直流道52的入口对准，由此，来自计量组件3的齿轮组的流体材料能够流入到底板5的底板流道中。底板5可以是大致矩形板，在此情况下，底板5的竖直流道52和水平流道53都形成在矩形的底板5的本体内部。然而，底板5可以具有从底表面56突出的突起部54。竖直流道52从底板5的顶表面55向下延伸到该突起部54中，并且水平流道53能够设置在该突起部54中以与该竖直流道52流体连通(如图7所示)。利用该突起部54，能够适当地降低底板5的整体厚度，由此降低底板5的重量。突起部54具有结合面541，优选地平面。水平流道53的出口设置在该突起部54中具体地该结合面541上。计量组件3的底板5的该结合面541适合于连接到喷头组件60的唇片7的对应表面。该竖直流道52和水平流道53可以具有多种截面形状，例如，圆形的截面形状。优选地，水平流道53可以具有扁口形截面，换言之，其截面具有狭槽形状。底板5的底板流道不限于竖直流道52和水平流道53，而是可以具有其他形式的流道。例如，竖直流道52和水平流道53之间可以设置有另外的流道。
该底板5优选地具有顶表面55上的密封槽51。与该密封槽51对 应的密封槽位于齿轮支撑板4的底表面上。该密封槽51与其对应的密封槽一起形成容纳空间，该容纳空间内部设置有密封构件。密封构件包围该计量组件3的内部空间以实现流体密封。
喷头组件60的唇片7可以直接连接到计量组件3的底板5，使得所述坝构件72的顶部边缘高于所述水平流道53的出口并且开口71与水平流道53的出口流体连通。通过唇片7的在与盖板6相反的一侧或面对底板5的一侧上的聚集槽722(参见图3)，所述开口71与水平流道53流体连通。可以构思开口71与水平流道53的出口之间的多种流体连通构造。盖板6在所述唇片7的与所述底板5相反的一侧连接到唇片7。
优选地，在所述唇片7和所述底板5之间设置有密封件8。在设置有密封件8的情况下，聚集槽722的深度可以为0。密封件8具有中央开口81，所述中央开口81的形状是大致矩形的。中央开口81和矩形开口71的主要尺寸不同。具体地，中央开口81的宽度大于或等于矩形开口71的宽度，且中央开口81的高度大于或等于矩形开口71的顶部边缘到底板5的水平流道53的出口的底部边缘的距离。唇片7和盖板6两者能够经由密封件8由螺钉固定到底板5。优选地，该螺钉从盖板6一侧依次穿过盖板6、唇片7、密封件8和底板5上的相应螺钉孔，由此将这些部件连接并固定到一起。
在工作状态下，来自底板5的水平流道53的流体例如液态胶首先到达坝构件72的背面并且被该背面阻挡。然后，液态胶沿着坝构件72的该背面升高，并且当液态胶升高到坝构件72的顶部边缘时，液态胶开始越过坝构件72的顶部边缘、穿过开口71进入到盖板6和唇片7之间的空间即聚集槽721中，并且最终经由凹部73流出喷头组件。流体材料的流动路径大致如图8中的箭头所示。
图9示出了分配系统的一部分的斜后分解图。唇片7可以与密封 件8平面接触。替代地或优选地，唇片7的在与所述盖板6相反的一侧上的、即与密封件8连接的一侧上的表面的外沿可以设置有凸台74，由此形成凹部用于接收密封件8。该凸台74限制密封件8的移动。该凸台的高度优选小于等于密封件8的厚度的约60％，以避免在密封件8被压缩后，凸台74与底板5的安装面541发生干涉。
优选地，聚集槽722的底部边缘与底板5的水平流道53的出口的底部边缘对齐或者具有相同高度。
该分配系统的各部件可以由相同的材料形成。优选地，各部件可以由铝合金制成。并且，该部件上可以设置减重孔，以降低系统的整体重量。
下面描述本实用新型的分配系统的组装。分配系统可以分为多个子系统，并且通过组装这些子系统来获得该分配系统。首先，将唇片7以及盖板6用螺钉固定到一起由此组成喷头组件60即第一子系统；将齿轮组、齿轮支撑版4、底部5以及顶板2固定到一起由此组成计量组件3即第二子系统；组装包括输送容器9的流体供应组件即第三子系统；将第一至第三子系统组转到一起；将驱动装置例如马达1组装到计量组件3上，从而形成整个分配系统。容易理解，以上的组装步骤不是固定的，而是可以以合适的方式自由改变。
下面描述本实用新型的分配系统的操作原理。
当控制装置11发出起动指令由此分配系统起动时，从胶罐或软管流出的流体进入到流体供应组件的输送容器9中。流体例如液态胶进入到计量组件3的顶板2的流道中，然后进入到齿轮组的入口侧间隙中。在马达1的驱动下，流体被计量组件3的齿轮组输送到齿轮组的出口侧间隙中，由此进入底板5中。从底板5流出的液态胶穿过密封件8，且被唇片7的坝构件72阻挡而升高。之后，流体越过坝构件72、 穿过开口71，进入到盖板6和唇片7之间的聚集槽721中，最终经由狭槽形式的凹部73从喷头组件流出以分配到工件或基板例如电池的表面上。由此，分配系统利用了狭缝式喷头或者喷头刮刀而将极薄的且具有预定宽度的液态胶分配在目标基板上。本实用新型的分配系统也可以称作为带式涂覆器，其结合了独特设计的狭缝喷嘴组件或喷头组件。
从流体流道和工作原理的角度考虑，本实用新型的喷头组件和/或分配系统的设计思想与之前任何一种狭缝涂布喷嘴的设计都是明显不同的。本实用新型的分配系统将精密计量泵和狭缝式喷头集成在一起，其实现了高精度涂布性能，提供了多种热液态胶供应，提供了各种类型的液态胶图案，提供了友好的人机界面交互，而且备件可靠耐用，维修方便。此外，本实用新型的分配系统支持自动化生产线的高速生产线。
本实用新型的分配系统适于对片式电池的表面、对用于制造片式电池的电极的电极片材等进行涂覆。该片式电池优选是用于对电动汽车提供动力的电池。电动汽车的动力电池通常采用锂离子电池的形式。通常，锂离子电池的阴极是由铝片材制成并且阳极由铜片材制成。
图10是用于生产电池单体的电极的电极片材的立体图。电动汽车用动力电池通常由多个片式电池单体层压在一起而形成。每个单体电池的电极诸如阴极和阳极通过切割电极片材并且将切割得到的片材区段层压在一起而形成。如图10所示，用于生产电池单体的电极的电极片材10具有长带状，通常被卷绕在卷轴上以形成一个卷盘。该电极片材10具有较厚的本体部101和较薄的边缘部102。边缘部102例如具有数十微米的厚度。该边缘部102位于本体部101的宽度方向上的一侧上。在本体部101和边缘部102的连接部处在上下两侧上分别形成台阶部103。本体部101和边缘部102分别具有矩形的横截面。本体部101的表面上通常已经具有涂层以防止腐蚀。边缘部102通常裸露或被 粘贴有胶带以便于进一步被模切。
图11是现有技术中电极片材被模切后获得的电极片材条带的立体图。为了形成用于制造电池单体的电极的、具有电极耳部的电极区段，通常对如图10所示的电极片材10通过模切机进行模切处理。电极片材10在传动辊的带动下经过模切机，模切机对该电极片材10进行模切，例如进行激光模切。模切路径沿着电极片材10的长度方向形成在该电极片材10的边缘部102上，并且模切路径通常不是直线。例如，在边缘部102上以均匀间隔形成多个耳部1021。通过将边缘部102的一部分即切除部(1022，请见图12)模切掉来形成该多个耳部1021。在模切之后，对模切得到的电极片材条带10’在片材条带的宽度方向上沿着切割线L进行切割以形成多个片材区段。然后，将多个片材区段层压在一起从而形成片式电池的电极。
现有技术中，如前所述，在模切之前，本体部101被涂覆有涂层，而边缘部102可以被贴上一层胶带，以对整个电极片材10进行保护。在模切后，得到的耳部保持部分裸露，例如至少耳部1021的外侧边缘被裸露，并且在该状态下形成电池单体的电极。在工作状态下，该电极直接浸泡在电解质中。由此，生产出的电池可能发生短路，并由此导致起火。这造成了很大的安全风险。
为了解决这个问题，需要电极片材的整个表面尤其是包括耳部的边缘部进行涂层处理，并且考虑到对较低涂布质量占比的要求，需要对电极片材的表面涂覆一层极薄的涂层。例如，产生了一种新的混合电极材料与导电粘合剂的导电胶。这种胶以极薄的一层涂在电极片材的边缘部上，以在电极导电的同时提供保护。涂层或底漆的厚度必须严格控制。该厚度需要被控制在小于30μm，优选小于20μm。根据本实用新型的喷头组件以及包含它的分配系统通过使得喷头组件的凹部73具有极小的凹进深度而能够分配极薄的流体层，由此能够解决上述问题。
具体地，提供了一种使用根据本实用新型的分配系统将流体分配的基板上的方法，所述基板具有较薄的部分。所述方法包括如下步骤：使用所述分配系统将流体分配到所述基板的较薄的部分上。由此，在较薄的部分上获得了极薄(小于20μm)的流体层。基板例如可以是用于制造片式电池的电极的片材。
图12是示出了根据新切割工艺被模切后获得的电极片材条带的立体图。如前所述，现有技术中，作为阴极片材或者阳极片材的电极片材10被送入模切机，以将电极片材模切成适合各种尺寸电极的窄条，即电极片材条带10’。具体地，在制备用于制造电池电极的电极片材区段时，需要首先将较长的电极片材10的边缘部102进行模切，通过完全去除边料即切除部1022来获得具有电极耳部1021的电极片材条带10’，然后对电极片材条带10’的包括至少一个电极耳部1021的区域进行横向切割，以获得多个尺寸相同的片材区段。现有技术中，电极片材10的边缘部102具有极薄的厚度，并且在对电极片材进行模切时，边缘部102通常是暴露的或者电极片材10的涂层区域即本体部101和空白区域即边缘部102之间粘贴有白色扁平胶带，并且由此形成的电极是至少部分暴露的。这就对电池造成了一定的安全隐患。
然而，利用根据本实用新型的分配系统，能够在模切后的边缘部102上分配一层极薄的流体，由此形成极薄的涂层。涂层的厚度通常小于20μm。由于涂层极薄，在对边缘部进行保护的同时，使得涂布质量保持较小。
另一方面，如图11所示，电极耳部1021为梯形，且模切后的边缘部102的外侧边缘(或模切路径)不是一条直线。因此，如果在模切后的电极片材的表面例如边缘部102的表面上直接涂流体例如液态胶，则由于喷头刀口的宽度保持不变，液态胶将明显粘到用于输送电极片材的输送辊上，由此污染了模切机。而且，现有的槽式分配器由 于喷出的胶层较厚，不可能分配胶水以直接包裹电极片材条带的外侧狭缝边缘。
因此，需要在将电极片材条带10’进一步切割成用于形成最终电极的片材区段之前，电极片材条带10’的外缘也要用胶水封好。也就是说，在形成片材区段之前，电极片材条带10’的电极耳部也需要得到充分保护。如果直接对电极片材条带的狭缝式外侧边缘进行涂胶，则因为该外侧边缘太薄，不能直接沿着整个边角进行有效的涂胶。
然而，利用本实用新型，提供了一种完全新型的片材模切和施胶封边工艺，其中一旦电极片材被模切开，就立即采用流体分配步骤。具体地，如图12所示，根据本实用新型，在对电极片材10进行模切时，并不是完全去除电极片材的边料即切除部1022。相反地，当进行模切时，模切机从距离电极片材的先端104隔开一定距离处开始模切。并且，模切机从距离电极片材的尾端105隔开一定距离处结束模切。即，模切路径并不延伸电极片材10的整个长度。通过上述模切工艺，使得电极片材的待被去除的边料即切除部1022并没有在模切时被去除，由此形成了包括片材主体和切除部的一体的电极片材条带10’。片材主体至少包括本体部101和耳部1021。现有技术中，电极片材的切除部是从电极片材的主体上直接剥离下来的。与之相比，在这种新工艺中，尽管连续的模切槽孔1023(请见图13)是朝着给料方向在电极片材10上切开的，但是模切后或者被输送到涂胶系统的电极片材条带10’仍然是一个整体，其包括待被去除的切除部1022。
图13是示出了根据本实用新型的分配系统和新模切工艺相组合的工作原理的示意图。如图13所示，模切后获得的电极片材条带10’仍然是将边料即切除部1022和片材主体作为一个完整的部分，然后将其在根据本实用新型的喷头组件60下方输送。之后，分配系统继续将流体例如液态胶均匀地喷在片材的边缘部102上。根据片材的实际尺寸，可以选择最佳尺寸的模切槽孔模式。只要边缘部102被涂上流体 例如液态胶，边缘部102上的模切槽孔1023中就会有一层薄薄的流体。喷头组件60非常接近基板表面即电极片材条带10’的边缘部102的表面，以便在一定程度上刮涂边缘部102上的流体。同时由于流体的重力作用，流体必然向下滴入模切槽孔1023并且可能穿透模切槽孔1023。由于这种反应，流体会逐渐包裹模切槽孔1023的相对的两个侧面。进一步，在模切后获得的电极片材条带10’在单面涂胶之后在输送辊上反向输送时，可以对电极片材条带10’的另一个表面进行相同处理。最后，随着另外的分离过程的进行，无用的狭窄边料即切除部1022将从片材主体上剥落。由此，模切后获得的电极片材条带10’的外侧切割边缘也被流体完全包裹。该外侧切割边缘包括耳部1021的外侧边缘以及耳部1021之间的外侧边缘。由此，实现了模切后获得的电极片材条带10’的电极耳部1021的完全涂层保护。
现有的模切工艺直接使用激光以电极耳部的形状连续切割电极片材。根据本实用新型，提供了一种全新的电极耳部模切和涂布工艺，尤其是封边工艺，由此能够便于提供一种新的电池单体制造技术，其能提高电动汽车电池的能量密度并且减轻安全隐患。本申请中阐述的技术是在模切过程中增加了分配系统例如涂胶头，按照新工艺要求，不但实现了在电极耳部的片材表面上刮涂极薄的特殊胶水例如导电胶，同时对模切后获得的电极片材条带的外侧边缘进行了封边保护例如涂胶保护。
本实用新型方案中，以特定方式形成了一种新的混合电极材料与导电粘合剂的胶。这种胶能够导电并且以极薄的一层涂在电极片材表面上。利用本实用新型的分配系统及其喷头组件，涂层厚度能够控制在20～30μm之间甚至更薄。由此，在有效保护电极耳部的同时，实现了较小的涂布质量。
如图12-13所示，为了避免在模切后获得的电极片材条带的外侧面的极薄边缘直接涂布流体例如施胶，对连续的电极片材模切和涂胶 工艺进行了微调。根据实施例，在片材模切工艺后，片材仍然保留为一个整体。然后，流体例如液态胶被喷头刀口刮涂在边缘部102的表面上，且压入模切槽孔1023中。然后，在片材的另一个面上进行相同的涂布处理。最后，流体能够渗透穿过模切槽孔1023，由此完全密封了电极片材条带的外侧的整个狭窄边缘。
可以根据实际需求来优化片材的模切槽孔1023的尺寸，以得到最好的封边效果。例如，模切槽孔1023的尺寸可以根据边缘部的厚度、流体的涂布温度、片材输送速度等来确定。在片材前进方向上，分配系统可以直接安装在模切机上，或者分离地位于模切机的前方。由此，片材能够在模切之后进行表面以及侧面上的涂胶处理。这提供了一种锂离子电池的电极片材的电极耳部的外缘涂胶的崭新方法，其与现有的涂胶方法完全不同。
替代地，可以直接在图11所示的电极片材条带上使用根据本实用新型的喷头组件和/或分配系统进行涂覆处理。在这种情况下，需要严格控制出胶量以及涂布速度，以尽可能避免对传送辊的污染。
此外，在片材的本体部101和边缘部102之间的台阶103处，可能执行单独的涂胶处理，以对该台阶的表面进行保护。由此，避免了胶带的使用。而且，可以选择喷头组件的喷头刀口的宽度，并且该宽度保持不变，由此在分配流体到基板上时，能够使涂胶宽度保持一致，并且通过设定/选择喷头组件的凹部73的凹进深度，实现了小于30微米优选20微米的胶厚度。
在本实用新型中，获得了与电极片材制造工艺改进相结合的带状涂层分配系统，其将提供最佳的设备和技术解决方案，不仅能在用于制造片式电极的电极片材上精确一致地涂上小于30μm优选小于20微米的极薄胶层，而且能完全密封片材外侧边缘。
本实用新型还涉及一种电极片材条带。通过上述新型的模切和封边工艺来获得该电极片材条带。本实用新型还涉及一种片式电池的电极，其包括多个电极区段，由根据上述工艺获得的电极片材条带来制造该电极区段。多个电极区段被层压在一起形成了该电极。本实用新型还涉及一种片式电池，其包括电极，电极由根据上述方法获得的电极区段层压在一起而获得。搭载这种电池的电动汽车的性能和安全性能够被大大提高。
上面已经参照附图详细描述本实用新型的具体实施例。可以预期的是，在不脱离所附权利要求限定的本实用新型的精神和范围的情况下，可以对本实用新型做出各种变形和修改。
附图标记清单：
1 马达
2 顶板
21 竖直流道
22 水平流道
23 竖直流道
3 计量组件
31 主动齿轮
32 从动齿轮
4 齿轮支撑板
5 底板
51 密封槽
52 竖直流道
53 水平流道
54 突起部
541 结合面
6 盖板
65 导向凸台
651 台阶
7 唇片
70 本体部
71 矩形开口
72 坝构件
721 聚集槽
722 聚集槽
73 凹部
74 凸台
75 导向凸台
8 密封构件
81 中央开口
9 输送容器
10 电极片材
101 本体部
102 边缘部
1021 耳部
1022 切除部
1023 模切槽孔
103 台阶部
10’ 电极片材条带
11 控制模块电极片材

Claims (30)

  1. 一种喷头组件(60)，其特征在于包括：
    唇片(7)，所述唇片(7)被构造成具有环形的本体部(70)和中央处的坝构件(72)，所述坝构件(72)从所述本体部(70)包围的矩形空间的底部边缘朝向顶部边缘延伸使得所述坝构件(72)的顶部边缘与所述矩形空间的顶部边缘之间形成矩形开口(71)，所述坝构件(72)在所述唇片(7)的横向方向上延伸所述矩形开口(71)的整个宽度，所述矩形开口(71)适于接收流体；和
    盖板(6)，所述盖板(6)被构造成连接到所述唇片(7)，
    其中，所述坝构件(72)相对于所述唇片(7)的与所述盖板(6)连接的表面凹进使得所述盖板(6)与所述坝构件(72)之间形成聚集槽(721)，所述聚集槽(721)与所述矩形开口(71)流体连通，并且
    在所述盖板(6)和所述唇片(7)的彼此面对的两个表面中的一个表面上设置有凹部(73)，所述凹部(73)与所述聚集槽(721)流体连通从而流体能够以带状从所述聚集槽(721)经由所述凹部(73)流出。
  2. 根据权利要求1所述的喷头组件，其特征在于，在所述唇片(7)的面对所述盖板(6)的表面上设置有所述凹部(73)，并且在所述横向方向上所述凹部(73)的宽度小于或等于所述坝构件(72)的宽度。
  3. 根据权利要求1或2所述的喷头组件，其特征在于，所述凹部(73)相对于设置有所述凹部(73)的所述表面凹进50μm至150μm。
  4. 根据权利要求1或2所述的喷头组件，其特征在于，所述坝构件(72)相对于所述唇片(7)的与所述盖板(6)相反的一侧上的表面凹进。
  5. 根据权利要求1或2所述的喷头组件，其特征在于，所述唇片(7)在与所述盖板(6)相反的一侧上的外沿设置有凸台(74)，用以接收密封件。
  6. 根据权利要求1或2所述的喷头组件，其特征在于，所述盖板(6)和/或所述唇片(7)的底表面上设置有导向凸台。
  7. 根据权利要求1或2所述的喷头组件，其特征在于，所述盖板(6)和所述唇片(7)由螺钉固定到一起。
  8. 一种分配系统，其特征在于包括：
    流体供应组件；
    计量组件(3)，所述计量组件(3)具有容积泵的形式并且被构造成与所述流体供应组件流体连通以接收来自所述流体供应组件的流体；和
    喷头组件，所述喷头组件与所述计量组件(3)流体连通以接收来自所述计量组件(3)的流体，
    其中，所述喷头组件是根据上述权利要求中的任一项所述的喷头组件(60)。
  9. 根据权利要求8所述的分配系统，其特征在于，所述流体供应组件包括输送容器(9)，所述输送容器(9)被构造成容纳有流体罐，或被构造成与供给流体的管相连接。
  10. 根据权利要求8或9所述的分配系统，其特征在于，所述计量组件(3)包括主动齿轮(31)和从动齿轮(32)。
  11. 根据权利要求10所述的分配系统，其特征在于，所述计量组件(3)包括：
    顶板(2)，所述顶板(2)具有顶板流道用于接收来自流体供应 组件的流体；
    底板(5)，所述底板具有底板流道，所述底板流道与所述喷头组件(60)的矩形开口(71)流体连通；和
    齿轮支撑板(4)，所述齿轮支撑板(4)位于所述顶板(2)和所述底板(5)之间，并且所述齿轮支撑板(4)具有位于中央部处的孔口，用于容纳所述主动齿轮(31)和从动齿轮(32)。
  12. 根据权利要求11所述的分配系统，其特征在于，所述主动齿轮(31)和从动齿轮(32)的各自的齿轮轴插入到所述底板(5)的对应孔中，以提供对所述齿轮轴的定位。
  13. 根据权利要求11所述的分配系统，其特征在于，所述主动齿轮(31)和所述从动齿轮(32)之间的在所述计量组件(3)的一侧上的间隙与所述顶板(2)的顶板流道流体连通，并且所述主动齿轮(31)和所述从动齿轮(32)之间的在所述计量组件(3)的另一侧上的间隙与所述底板(5)的底板流道流体连通。
  14. 根据权利要求11所述的分配系统，其特征在于，在所述齿轮支撑板(4)和所述底板(5)之间设置有密封构件，所述密封构件包围所述齿轮支撑板(4)中的孔口。
  15. 根据权利要求11所述的分配系统，其特征在于，所述喷头组件(60)的唇片(7)连接到所述底板(5)使得所述坝构件(72)的顶部边缘高于所述底板流道的出口。
  16. 根据权利要求11所述的分配系统，其特征在于，在所述唇片(7)和所述底板(5)之间设置有密封件(8)，所述密封件具有矩形的中央开口(81)。
  17. 根据权利要求16所述的分配系统，其特征在于，所述中央开 口(81)的宽度大于或等于所述矩形开口(71)的宽度，且所述中央开口(81)的高度大于或等于从所述矩形开口(71)的顶部边缘到所述底板(5)的底板流道的出口的底部边缘的距离。
  18. 根据权利要求11所述的分配系统，其特征在于，所述底板(5)具有突起部(54)，所述底板(5)的底板流道的出口设置在所述突起部中，所述突起部适于被连接到所述唇片(7)。
  19. 一种使用根据权利要求8所述的分配系统将流体分配的基板上的方法，所述基板具有较薄的部分，其特征在于，所述方法包括如下步骤：
    使用所述分配系统将流体分配到所述基板的较薄的部分上。
  20. 根据权利要求19所述的方法，其特征在于，所述基板是用于制造电池的电极的电极片材(10)，所述电极片材具有较厚的本体部(101)和较薄的边缘部(102)，所述边缘部(102)位于所述本体部的一侧上并与所述本体部连续，所述方法包括如下步骤：
    使用所述分配系统将流体分配到所述边缘部(102)的表面上，以生产电极片材条带(10’)。
  21. 根据权利要求20所述的方法，其特征在于，所述方法包括：
    将所述电极片材(10)输送到模切机，并且利用所述模切机对所述边缘部(102)沿模切路径进行模切；和
    在模切之后，使用所述分配系统将流体分配到所述边缘部(102)的表面上以生产所述电极片材条带(10’)。
  22. 根据权利要求21所述的方法，其特征在于，所述模切机从距离所述电极片材的先端(104)隔开一定距离处开始模切，并且从距离所述电极片材的尾端(105)隔开一定距离处结束所述模切。
  23. 根据权利要求22所述的方法，其特征在于，将所述电极片材(10)的所述边缘部(102)模切成使得所述边缘部(102)上的模切槽孔(1023)的宽度适于使得来自所述分配系统的流体完全渗透所述模切槽孔(1023)。
  24. 根据权利要求23中的任一项所述的方法，其特征在于，根据所述边缘部的厚度、流体的涂布温度和/或片材输送速度来确定所述模切槽孔(1023)的宽度。
  25. 根据权利要求21-23中的任一项所述的方法，其特征在于，所述模切路径是非直线的。
  26. 根据权利要求25所述的方法，其特征在于，所述边缘部(102)被模切成沿着所述模切路径形成多个电极耳部(1021)。
  27. 一种电极片材条带，所述电极片材条带用于制造电池的电极，其特征在于，使用根据权利要求20-26中的任一项所述的方法来制造所述电极片材条带(10’)。
  28. 根据权利要求27所述的电极片材条带，其特征在于，所述电极片材条带沿宽度方向被切割成形状相同的多个片材区段，所述多个片材区段被层压在一起来构成所述电极。
  29. 一种电极，其特征在于，所述电极由根据权利要求27所述的电极片材条带(10’)来制造。
  30. 根据权利要求29所述的电极，其特征在于，所述电极是电池的阳极或阴极。
PCT/CN2022/087132 2021-04-16 2022-04-15 喷头组件、分配系统、电极片材条带以及电极 WO2022218418A1 (zh)

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