JP2023112481A - Liquid discharge device, electrode forming device and multi-layered separator forming device - Google Patents

Abstract

To enable a surface but also a side surface of an electrode substrate to be printed, while preventing liquid from adhering to a conveyance surface, in performing borderless-printing in which not only the surface but also the side surface thereof are printed.SOLUTION: A liquid discharge device comprises a conveying part that conveys a substrate, a liquid adhesion member provided on the conveying part and partially sandwiched between an end part of the substrate and the conveying part, and a discharge part that discharges a liquid composition to the substrate and the liquid adhesion member, where the substrate inclines with respect to a conveyance surface of the substrate in the conveying part.SELECTED DRAWING: Figure 4

Description

The present invention relates to a liquid ejecting apparatus, an electrode forming apparatus and a multilayer separator forming apparatus.

Conventionally, electrodes used in electrochemical devices such as power storage devices such as batteries, power generation devices such as fuel cells, and solar power generation devices are prepared by dispersing a powdery active material or a catalyst composition in a liquid. is applied on the electrode substrate, fixed and dried. For the application of the liquid, a spray, dispenser, die coater, pull-up coating, and printing using an inkjet head have been usually used.

Japanese Patent Application Laid-Open No. 2002-200001 discloses a technique of removing the liquid with a liquid removing member by causing the liquid adhering to the conveying surface to fly by electrostatic force during idle discharge after applying the liquid.

However, according to the prior art, when the amount of adhesion is large, as in borderless printing in which not only the surface but also the side surface of the electrode substrate is printed, it is unrealistic to fly the particles by electrostatic force.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to perform borderless printing in which not only the surface but also the side surface of an electrode substrate is printed, without causing liquid to adhere to the conveying surface.

In order to solve the above-described problems and achieve the object, the present invention provides a transport section that transports a substrate, and a transport section that is provided on the transport section and is partially sandwiched between an end portion of the substrate and the transport section. a liquid adhering member; and an ejection section for ejecting a liquid composition onto the base and the liquid adhering member, wherein the base is inclined with respect to a conveying surface of the base in the conveying section. characterized by

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the case of borderless printing which prints not only the surface of an electrode substrate but a side surface, and can print without making a conveyance surface adhere to a liquid.

FIG. 1 is a schematic diagram of an electrode printing apparatus according to a first embodiment. FIG. 2 is a side view showing an ink removing mechanism provided in the electrode printing device. FIG. 3 is a plan view showing an ink removing mechanism provided in the electrode printing device. FIG. 4 is a front view showing a cross-section of the ink removing mechanism provided in the electrode printing device as seen from the downstream side in the transport direction. FIG. 5 is a diagram showing the positional relationship between the electrode substrate and the liquid adhering member. FIG. 6 is a plan view showing an ink removing mechanism provided in the electrode printing apparatus according to the second embodiment. FIG. 7 is a front view showing a cross section of the ink removing mechanism provided in the electrode printing device as seen from the downstream side in the transport direction. FIG. 8 is a schematic diagram of an electrode forming apparatus according to a third embodiment.

Exemplary embodiments of a liquid ejecting device, an electrode forming device, and a multilayer separator forming device will be described in detail below with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a diagram schematically showing an electrode printing device 1 according to the first embodiment.

As shown in FIG. 1, an electrode printing apparatus 1 uses a liquid ink as a functional layer forming ink to print the surface of an electrode substrate as a substrate (hereinafter also referred to as "electrode substrate surface") and the surface of an active material layer. (hereinafter also referred to as "active material layer surface"). In other words, the electrode printing apparatus 1 uses liquid ink to position-selectively form a functional layer on the electrode substrate surface and/or the active material layer surface.

In the present specification and claims, the term "functional layer" means a layer that functions in the manufacture and/or use of an electrochemical device. For example, when an insulating resin layer and/or inorganic layer is provided on the electrode active material, the functional layer functions as an insulating layer.

Further, in the following embodiments, a structure in which the functional layer is provided on the electrode substrate will be described. Alternatively, it may be a multi-layer separator forming apparatus having a multi-layer separator as a substrate, in which a layer different from the separator is provided on the separator.

As shown in FIG. 1, the electrode printing apparatus 1 includes a transport mechanism 3 as a transport section for transporting an electrode substrate 2 as a substrate and/or an electrode having an active material layer on the electrode substrate 2 . Further, the electrode printing apparatus 1 includes an image recognition device 9 , a liquid ejection head 4 , a light source 5 , a heater 6 , and a liquid ejection head in order from the upstream side to the downstream side in the transport direction X of the electrode substrate 2 by the transport mechanism 3 . 7, a light source 5, a heater 6, and the like are arranged.

The electrode substrate 2 is, for example, a current collector which is a metal component for extracting electric power stored in the electrode body inside the battery case to the outside of the battery case. Alternatively, the electrode substrate 2 is, for example, an electrode element having a current collector and an active material layer formed on the current collector.

The electrode substrate 2 is a conductive foil having flatness, and can be suitably used for secondary batteries and capacitors, which are generally electric storage devices, especially lithium ion secondary batteries. Examples of conductive foils include aluminum foil (hereinafter referred to as "aluminum foil"), copper foil, stainless steel foil, titanium foil, and etched foils obtained by etching them with fine holes, and holes used in lithium ion capacitors. A perforated electrode substrate or the like is used.

As the electrode substrate 2, carbon paper fibrous electrodes used in power generating devices such as fuel cells are made into a non-woven or woven flat surface, or the above perforated electrode substrates having fine holes are used. can.

The image recognition device 9 is arranged on the most upstream side in the transport direction X and functions as an information acquisition means for acquiring defect information and position information on the surface of the active material layer formed on the electrode substrate 2 . The image recognition device 9 is composed of, for example, a camera and a line sensor. The image recognition device 9 is used when an active material layer already exists on the electrode substrate 2, and recognizes and records the position of the active material image and the position of the defect on the electrode substrate 2, so it is an essential configuration. not, but provided as needed.

The transport mechanism 3 transports the electrode substrate 2 so that the electrode substrate 2 passes in front of the liquid ejection head 4 , the light source 5 , and the heater 6 in sequence. The conveying mechanism 3 can be composed of, for example, a belt for moving the electrode substrate 2, a combination of an air floating mechanism or rollers, and a drive mechanism including a motor for driving it. Further, the transport mechanism 3 may be further provided with a guide member or the like for assisting the movement of the electrode substrate 2 .

The liquid ejection head 4 functions as a liquid ejection head for forming an ink layer that ejects a liquid ink (liquid composition), which is an ink for forming a resin layer and/or an inorganic layer, onto the electrode substrate 2 to form an ink layer. . The liquid ejection head 4 deposits liquid ink on the electrode substrate 2 in accordance with image signals relating to information for forming a frame pattern as an ink layer pattern to be described later, and defect information acquired by the image recognition device 9 as necessary. to form an ink layer that is a precursor of the resin layer and/or the inorganic layer. As the liquid ejection head 4 , heads arranged in a line having a width equal to or greater than the width in the width direction perpendicular to the transport direction X of the electrode substrate 2 can be used. There are no particular restrictions on the pressure generating means and driving method for ejecting the liquid ink from the liquid ejection head 4 . For example, a thermal actuator for ejecting liquid ink droplets using vapor pressure generated by the heat of a heating element, a piezoelectric actuator for ejecting liquid ink droplets using mechanical pressure pulses generated by a piezoelectric element, or An electrostatic actuator or the like comprising a diaphragm and a counter electrode may be used. Furthermore, the liquid ink may be flown by turning on and off the pressure of the liquid ink supply system as necessary.

The light source 5 has a curing function of irradiating the ink layer formed on the electrode substrate 2 with light to cure the ink layer into a resin layer. As the light source 5, for example, mercury lamps such as low, medium and high pressure mercury lamps, tungsten lamps, arc lamps, excimer lamps, excimer lasers, semiconductor lasers, high output UV-LEDs, YAG lasers, lasers and nonlinear optical crystals. , a high-frequency induced ultraviolet ray generator, an electron beam irradiation device such as an EB cure, an X-ray irradiation device, or the like can be used. Among them, it is preferable to use a high-frequency induced ultraviolet ray generator, a high/low pressure mercury lamp, a semiconductor laser, or the like, because the system can be simplified. Further, the light source 5 may be provided with a condensing mirror or a sweeping optical system.

The heater 6 serves as curing/drying means or heating means/heating mechanism for heating the ink layer formed by ejecting the ink for forming the inorganic layer formed on the electrode substrate 2 to promote curing or drying. has the function of As the heater 6, for example, an infrared lamp, a roller (heat roller) containing a heating element, a blower for blowing out warm or hot air, a boiler-type furnace using water vapor or the like into which hot air is introduced, or the like can be used.

The liquid ejection head 7 functions as coating means for further coating an active material as necessary when forming an active material layer continuously on the electrode substrate 2 on which a resin layer has been previously provided. Instead of the liquid ejection head 7, a die head having an intermittent function, a high-speed dispenser, a jet nozzle, a spray nozzle, or a liquid ejection head similar to the above may be used to apply the ink for forming the active material layer.

In this case, the liquid ejection head 7 ejects an active material layer-forming ink (liquid composition) containing an active material onto the surface of the electrode substrate 2 to form an active material layer. Acts as a head. The liquid ejection head 7 is provided as appropriate and necessary. Based on the defect information acquired by the image recognition device 9, the ink for forming the resin layer and/or the inorganic layer is applied to the defective portion of the surface of the active material layer. It also functions as an application means for applying the

As described above, the liquid ejection head 7 ejects a liquid ink, which is an ink for forming a resin layer and/or an inorganic layer, onto the electrode substrate 2 to form an ink layer with the same liquid for forming an ink layer as the liquid ejection head 4 . It may function as an ejection head.

The electrode printing apparatus 1 is equipped with a control device for controlling operations of the transport mechanism 3, the image recognition device 9, the liquid ejection head 4, the light source 5, the heater 6, the liquid ejection head 7, the light source 5, the heater 6, and the like. .

Next, the operation of the electrode printing device 1 will be described.

First, the controller of the electrode printing apparatus 1 drives the transport mechanism 3 to transport the electrode substrate 2 in the transport direction X from right to left in FIG. At this time, the transport speed of the electrode substrate 2 is, for example, within the range of 0.1 m/min to several hundred m/min.

When the image recognition device 9 is provided upstream of the electrode printing device 1, the control device of the electrode printing device 1 observes the electrode surface with the image recognition device 9, and includes a camera for recording the position information of the defective portion. A line sensor is used to read the defective portion and its position, and feedback to subsequent liquid ink ejection/printing by the liquid ejection head 4 is performed.

When the electrode substrate 2 is transported to the front of the liquid ejection head 4, the controller of the electrode printing apparatus 1 controls the liquid ejection head 4 in accordance with the image signal to eject the liquid ink. An ink layer is thereby formed on the electrode substrate 2 .

Next, the controller of the electrode printing apparatus 1 conveys the electrode substrate 2 on which the ink layer is formed to the front of the light source 5 . When the electrode substrate 2 passes in front of the light source 5, the controller of the electrode printing apparatus 1 drives the light source 5 to irradiate the ink layer formed on the electrode substrate 2 with light, thereby exposing the ink layer. Harden. The irradiation light intensity at the position of the ink layer surface varies depending on the wavelength of the light source used, etc., but is usually within the range of several mW/cm ² to 1 KW/cm ² . The amount of exposure to the ink layer can be appropriately set according to the sensitivity of the liquid ink, the moving speed of the surface to be printed (the conveying speed of the electrode substrate 2), and the like.

Subsequently, the controller of the electrode printing apparatus 1 conveys the electrode substrate 2 carrying the cured ink layer into or near the heater 6 . When the electrode substrate 2 passes through or near the heater 6, the controller of the electrode printing apparatus 1 drives the heater 6 to heat the ink layer formed on the electrode substrate 2 so that the ink layer contains An insulating layer is formed by drying the solvent. Since the heater 6 requires sufficient heating to remove the solvent in the ink layer, its capacity is determined depending on the speed of the transport mechanism 3 and the boiling point of the solvent. Therefore, the heater 6 normally heats the ink layer so that the maximum temperature reaches a relatively high temperature of about 200° C. or less, preferably about 80° C. to 200° C. or about 60° C. to 180° C., and the drying time is set for the ink layer. Although it depends on the thickness of the film, it is preferable that the heating time is usually about 0.5 to 60 minutes, more preferably 1 to 10 minutes. Moreover, the cross-linking reaction may be accelerated during the main heating. In this case, in the electrode printing apparatus 1 shown in FIG. 1, the heating time by the heater 6 is usually relatively short, approximately several seconds to several tens of seconds. Therefore, when the ink layer is almost completely cured by the heater 6, the highest temperature is, for example, about 200.degree. C. or less, preferably about 80.degree. Heat up to

Subsequently, when the active material layer has not yet been formed on the electrode substrate 2, the control device of the electrode printing apparatus 1 ejects the active material layer forming ink onto the surface of the electrode substrate 2 using the liquid ejection head 7 or the like. to form an active material layer, and the heater 6 dries it. Since the heater 6 requires sufficient heating to remove the solvent in the active material, its capacity is determined depending on the speed of the transport mechanism 3 and the boiling point of the solvent. For this reason, the heater 6 normally heats the active material so that the maximum temperature is about 200° C. or less, preferably about 80° C. to 200° C. or about 60° C. to 180° C., which is relatively high. Although it depends on the thickness of the layer, it is generally preferred to heat for about 0.5 to 60 minutes, more preferably 1 to 10 minutes.

After that, the control device of the electrode printing apparatus 1 winds up the electrode substrate 2 in the case of a strip, or conveys it to a stocker (container for storing thin film electrodes). This completes the electrode printing.

The heating means for heating the ink layer is generally known as a heat source, and any device that can be controlled may be used. When used, heating can be performed simultaneously with light irradiation. In this case, curing can be accelerated, which is more preferable.

When the ink layer is irradiated with light, the ink layer is heated by the heat generated from the light source 5. Therefore, unlike the heater 6, the heating means does not necessarily need to be provided as an independent member. However, it takes a long time to completely cure the ink layer by leaving it at room temperature only with the heat from the light source 5 . Therefore, it is desirable to apply the room temperature standing to applications in which a sufficiently long time can be secured until complete curing. For example, a printed matter such as a newspaper advertisement to be distributed the next day can be completely cured even if it is left at room temperature because the time required for curing can be as long as about one day and night.

Examples of such light sources include Light Hammer Series (manufactured by Fusion UV Systems). In addition, LED manufacturers such as Nichia Corporation sell high-brightness UV-LEDs and laser diodes of 1 W or more, and these can be suitably used by arranging them in a line or on a plane. . In addition, when it is difficult for light to reach due to penetration into the gaps of the active material powder, an electron beam or an X-ray irradiation device can be used as a light source. It is preferably used.

In the electrode printing device 1, which is a device for ejecting liquid ink according to the present embodiment, two or more liquid ejection heads for ejecting different liquid inks (for example, liquid ink layers of both a resin layer and an inorganic layer) are provided. , multi-layer simultaneous printing and mixing of liquid inks at the point of impact.

In the electrode printing apparatus 1 described above, in order to move the electrode substrate 2 relative to the liquid ejection head 4 or 7 or the like, the electrode substrate 2 is formed with a desired thickness of the resin layer and/or the inorganic layer. Although the electrode substrate 2 is moved by providing the transport mechanism 3 for transporting, the liquid ejection head 4 or the like may be moved in the transport direction X as required. Also, both the electrode substrate 2 and the liquid ejection head 4 or 7 may be moved.

Furthermore, by appropriately using the technique described in the present embodiment, it is possible to perform overprinting and to form a relatively thick resin layer and/or inorganic layer pattern. That is, a resin layer and/or an inorganic layer having a thickness of several tens of μm or more is formed by repeating ejection of the liquid ink in a predetermined region of the electrode substrate and curing of the resulting ink layer a plurality of times. It is also possible to

When the electrode active material layer is formed on the electrode substrate 2 and the liquid ejection head 4 or 7 is used to form a resin layer or an inorganic layer, the control device of the electrode printing device 1 controls the image recognition device 9. By feeding back the defect of the obtained electrode active material layer and changing the concentration, thickness or type of liquid ejected by the liquid ejection head 4 or 7 respectively, the defect of the electrode active material layer can be corrected by the active material, the resin, or the like. A layer, an inorganic layer, and an improvement in patterning the inorganic layer.

The thin-film electrode according to the present embodiment is intended to have a single unit thickness of typically 1 mm or less, more preferably 500 μm or less. Although the lower limit of the thickness is not specified, it is about 1 μm because of the limit of current foil manufacturing technology. By realizing and providing a thin-film electrode having the thickness described above and having the effects described above and below, it is possible to contribute to high performance, light weight, and miniaturization of various devices (especially lithium-ion secondary batteries).

By the way, in the electrode printing apparatus 1, when forming an ink layer or an active material layer on the electrode substrate 2 by ejecting liquid (liquid composition) from the liquid ejection heads 4 and 7, which are ejection portions, the electrode substrate 2 borderless printing in which ink is ejected beyond the edge in the width direction perpendicular to the transport direction X of the paper. Here, borderless printing in this embodiment means printing not only the surface of the electrode substrate 2 but also the side surface of the electrode substrate 2, and is different from borderless printing in which the entire surface is generally printed. When borderless printing is executed in this way, there is a problem that the belts and the like constituting the transport mechanism 3 are stained by the ink ejected to the outside of the electrode substrate 2 .

Therefore, in the electrode printing apparatus 1 according to this embodiment, the ink ejected to the outside of the electrode substrate 2 is removed by the ink removing mechanism. This point will be described below.

2 is a side view showing the ink removing mechanism provided in the electrode printing device 1, FIG. 3 is a plan view showing the ink removing mechanism provided in the electrode printing device 1, and FIG. FIG. 10 is a front view showing a state in which a cross section of the ink removing mechanism that is mounted is viewed from the downstream side in the conveying direction;

As shown in FIGS. 2 to 4, the ink removing mechanism includes a liquid adhering member 11 which is provided on the belt 3a constituting the transport mechanism 3 and adheres the liquid L ejected from the liquid ejection heads 4 and 7; and a liquid removing member 12 which is a removing portion for removing the liquid L on the adhering member 11 .

The liquid adhering member 11 has a long tape shape and is a region on the belt 3a that constitutes the transport mechanism 3, and is parallel to the transport surface of the electrode substrate 2 and perpendicular to the transport direction X. It is provided so as to cover the area around the end (the position where the liquid L is discharged outside the electrode base 2). Therefore, part of the liquid adhering member 11 is sandwiched between the edge of the electrode substrate 2 and the belt 3 a that constitutes the transport mechanism 3 . As a result, the electrode substrate 2 is inclined with respect to the conveying surface of the electrode substrate 2 on the belt 3 a constituting the conveying mechanism 3 .

The liquid adhering member 11 is made of, for example, a non-permeable material. The term “non-permeability” refers to the property that the liquid L does not permeate the inside of the liquid adhering member 11 and the liquid L does not flow to the rear surface of the liquid adhering member 11 . Specifically, the liquid adhering member 11 is made of, for example, synthetic resin such as fluororesin, PTFE (Polytetrafluoroetheylene), PET (Polyethyleneterephthalate) resin, or polyimide film. By forming the liquid adhering member 11 from a non-permeable material in this manner, the liquid L ejected to the outside of the electrode substrate 2 does not permeate the liquid adhering member 11, so that the electrodes of the belt 3a constituting the conveying mechanism 3 are prevented from penetrating the liquid adhering member 11. The conveying surface of the substrate 2 is not soiled.

The liquid adhering member 11 is placed on the belt 3a constituting the transport mechanism 3 by a tape applying device (not shown) provided on the upstream side of the transport mechanism 3 in the transport direction. As described above, the liquid adhering member 11 is installed upstream in the transport direction of the transport mechanism 3, so that the liquid L ejected from the liquid ejection heads 4 and 7 can be deposited downstream of the transport mechanism 3 in the transport direction. can.

By providing the liquid adhering member 11 made of an impermeable material so as to cover one end of the transport surface of the electrode substrate 2 (the position where the liquid L is ejected to the outside of the electrode substrate 2), the liquid Since the liquid L ejected from the ejection heads 4 and 7 to the outside of the electrode substrate 2 adheres to the liquid adhering member 11, the liquid L is ejected to the outside of the electrode substrate 2 onto the conveying surface of the electrode substrate 2 on the belt 3a constituting the conveying mechanism 3. It is possible to prevent the deposited liquid L from adhering.

Further, the liquid removing member 12 is provided in the vicinity of the roller 3b on the downstream side of the electrode substrate 2 in the conveying direction of the belt 3a constituting the conveying mechanism 3. As shown in FIG. The liquid removing member 12 removes the liquid L ejected onto the liquid adhering member 11 by, for example, scraping off the liquid L on the liquid adhering member 11 with a brush and sucking it.

An example has been described in which the tape applying member 100 is provided on the upstream side of the electrode substrate 2 in the conveying direction, and the liquid removing member 12 is provided on the downstream side of the electrode substrate 2 in the conveying direction. On the downstream side in the direction, the liquid removing member 12 may be provided on the upstream side in the transport direction of the electrode substrate 2 , or may be provided on the upstream side in the transport direction or the downstream side in the transport direction of the electrode substrate 2 .

Next, the positional relationship between the electrode substrate 2 and the liquid adhering member 11 will be described.

Here, FIG. 5 is a diagram showing the positional relationship between the electrode substrate 2 and the liquid adhering member 11. As shown in FIG. Usually, when the gap t between the electrode substrate 2 and the liquid adhesion member 11 is small, the liquid L adhering to the liquid adhesion member 11 is drawn by capillary action, and the liquid adhering to the liquid adhesion member 11 on the back surface of the electrode substrate 2 is drawn. L sticks. When the liquid L adheres to the back surface of the electrode substrate 2 in this manner, the belt 3a and peripheral parts constituting the transport mechanism 3 are soiled.

Therefore, in the present embodiment, the distance between the liquid adhesion member 11 and the uppermost side with respect to the liquid adhesion member 11 among the sides of the surface of the electrode substrate 2 in contact with the liquid adhesion member, that is, the electrode The longest distance among the distances vertically lowered from the edge of the base 2 to the liquid adhering member 11 (gap distance: t in the figure) is 30 μm or more. By doing so, it is possible to prevent the liquid L adhering to the liquid adhering member 11 from flowing to the back surface of the electrode substrate 2 due to capillary action.

As described above, according to the present embodiment, during borderless printing, the liquid L ejected onto the electrode substrate 2 is caused to adhere to the liquid adhering member 11, and then the liquid L on the liquid adhering member 11 is removed by the liquid removing member 12. Remove. As a result, printing can be performed without causing the liquid L to adhere to the belt 3a constituting the transport mechanism 3 during borderless printing.

Note that the controller of the electrode printing apparatus 1 controls the liquid ejection heads 4 and 7 so that the liquid L is not applied to the area where the liquid adhering member 11 is not provided on the conveying surface of the electrode substrate 2 on the belt 3 a that constitutes the conveying mechanism 3 . may be controlled so as not to discharge the By doing so, the liquid L does not protrude from the liquid adhering member 11, so that the transport surface of the transport mechanism 3 and the electrode printing device 1 are not soiled.

In this embodiment, ink (liquid L) is ejected from the liquid ejection heads 4 and 7 to form an ink layer or an active material layer on the electrode substrate 2. However, the present invention is not limited to this. The insulating layer may be formed by ejecting a liquid L containing an insulating material from a liquid ejection head.

(Second embodiment)
Next, a second embodiment will be described.

In the second embodiment, both end portions of the belt 3a constituting the transport mechanism 3 in the direction parallel to the transport surface of the electrode substrate 2 and perpendicular to the transport direction X (the liquid L is discharged outside the electrode substrate 2). The difference from the first embodiment is that the liquid adhering member 11 is provided so as to cover the position where the liquid adhering member 11 is positioned. Hereinafter, in the description of the second embodiment, the description of the same portions as those of the first embodiment will be omitted, and the portions different from those of the first embodiment will be described.

Here, FIG. 6 is a plan view showing an ink removing mechanism provided in the electrode printing device 1 according to the second embodiment, and FIG. It is a front view which shows the state seen from the side.

As shown in FIGS. 6 and 7, the liquid adhering member 11 is formed on both ends of the belt 3a constituting the transport mechanism 3 in a direction parallel to the transport surface of the electrode substrate 2 and orthogonal to the transport direction X (electrode substrate 2 (position where the liquid L is ejected outside the )). Therefore, part of the liquid adhering member 11 is sandwiched between the edge of the electrode substrate 2 and the belt 3 a that constitutes the transport mechanism 3 . As a result, the electrode substrate 2 is inclined at both ends in the direction orthogonal to the transport direction X with respect to the transport surface of the electrode substrate 2 on the belt 3a constituting the transport mechanism 3, provided that it has flexibility. will do.

By providing the liquid adhering member 11 made of an impermeable material so as to cover both ends of the transport surface of the electrode substrate 2 (positions where the liquid L is ejected to the outside of the electrode substrate 2), the liquid Since the liquid L ejected from the ejection heads 4 and 7 to the outside of the electrode substrate 2 adheres to the liquid adhering member 11, the liquid L is ejected to the outside of the electrode substrate 2 onto the conveying surface of the electrode substrate 2 on the belt 3a constituting the conveying mechanism 3. It is possible to prevent the deposited liquid L from adhering.

Also in the present embodiment, the distance between the liquid adhesion member 11 and the uppermost side of the side of the electrode substrate 2 in contact with the liquid adhesion member with respect to the liquid adhesion member 11, that is, the electrode substrate The longest distance among the distances (distances in the gap) vertically lowered from the end of 2 to the liquid adhering member 11 is set to 30 μm or more. By doing so, it is possible to prevent the liquid L adhering to the liquid adhering member 11 from flowing to the back surface of the electrode substrate 2 due to capillary action.

(Third Embodiment)
Next, a third embodiment will be described.

The third embodiment differs from the first and second embodiments in that it is an electrode forming apparatus provided with an electrode printing apparatus 1 . Hereinafter, in the description of the third embodiment, the description of the same portions as those of the first and second embodiments will be omitted, and the portions that are different from those of the first and second embodiments will be omitted. will be explained.

Here, FIG. 8 is a diagram schematically showing an electrode forming apparatus 50 according to the third embodiment. As shown in FIG. 8, the electrode forming apparatus 50 is provided downstream of the electrode printing apparatus 1, such as a press roll as a means for pressing the obtained thin film electrode, or a cutting mechanism such as a slit blade or a laser for cutting the thin film electrode. , the post-processing mechanism 20 is provided.

Although preferred embodiments and examples of the present invention have been described above, the present invention is not limited to such specific embodiments and examples, and unless otherwise limited in the above description, Various modifications and changes are possible within the spirit and scope of the present invention described in . For example, it may be an appropriate combination of the technical matters described in the above embodiments and examples.

For example, in the above embodiments, the thin-film electrode having the above effect of the present invention is applied to a lithium-ion secondary battery, but the present invention is not limited to this, and the secondary battery, which is the electricity storage device described above, or the fuel cell. It can also be applied or mutatis mutandis to a power generation device such as

The effects described as appropriate in the embodiments of the present invention are merely enumerations of the most suitable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. not a thing

REFERENCE SIGNS LIST 1 liquid ejecting device 2 substrate 3 conveying section 4, 7 ejecting section 11 liquid adhering member 12 removing section 20 post-treatment mechanism 50 electrode forming apparatus

JP 2006-264172 A

Claims (17)

a transport unit that transports the substrate;
a liquid adhering member provided on the conveying section and partially sandwiched between an end portion of the substrate and the conveying section;
a discharge section for discharging a liquid composition onto the substrate and the liquid adhesion member;
with
the substrate is inclined with respect to a transport surface of the substrate in the transport unit;
A liquid ejection device characterized by: a removing unit for removing the liquid composition ejected onto the liquid adhering member;
2. The liquid ejecting apparatus according to claim 1, wherein: The ejection section does not eject the liquid composition to a region of the transport section where the liquid adhesion member is not provided.
3. The liquid ejecting apparatus according to claim 1, wherein: The liquid adhering member is a non-permeable material,
4. The liquid ejecting apparatus according to any one of claims 1 to 3, characterized in that: The impermeable material is a synthetic resin,
5. The liquid ejecting apparatus according to claim 4, characterized in that: The distance between the liquid adhesion member and the side positioned highest with respect to the liquid adhesion member among the sides of the surface of the base body in contact with the liquid adhesion member is 30 μm or more.
6. The liquid ejecting apparatus according to any one of claims 1 to 5, characterized in that: The ejection section ejects the liquid composition beyond an edge in a width direction perpendicular to the transport direction of the substrate.
7. The liquid ejecting apparatus according to any one of claims 1 to 6, characterized in that: The liquid adhering member is placed on the conveying unit by a pasting device provided upstream in the conveying direction in the conveying unit.
8. The liquid ejecting apparatus according to any one of claims 1 to 7, characterized in that: The ejection unit ejects the liquid composition from a liquid ejection head.
9. The liquid ejecting apparatus according to any one of claims 1 to 8, characterized by: The liquid adhering member is provided at one end of the transport section in a direction parallel to the transport surface of the substrate and perpendicular to the transport direction.
9. The liquid ejecting apparatus according to any one of claims 1 to 8, characterized by: The liquid adhering members are provided on both side end portions of the transport section in a direction parallel to the transport surface of the substrate and perpendicular to the transport direction.
9. The liquid ejecting apparatus according to any one of claims 1 to 8, characterized by: The base is a current collector, which is a metal component for extracting electric power stored in the electrode body inside the battery case to the outside of the battery case.
12. The liquid ejecting apparatus according to any one of claims 1 to 11, characterized in that: The base includes a current collector, which is a metal component for extracting electric power stored in the electrode body inside the battery case to the outside of the battery case, and an active material layer formed on the current collector. is an electrode element having
12. The liquid ejecting apparatus according to any one of claims 1 to 11, characterized in that: the ejection unit ejects the liquid composition containing an insulating material;
14. The liquid ejecting apparatus according to any one of claims 1 to 13, characterized in that: The transport unit is a belt transport,
15. The liquid ejecting apparatus according to any one of claims 1 to 14, characterized in that: a liquid ejection device according to any one of claims 1 to 15;
a post-processing mechanism provided downstream of the liquid ejection device;
with
The substrate is an electrode substrate,
An electrode forming apparatus characterized by: A liquid ejection device according to any one of claims 1 to 15,
The substrate is a separator,
A multilayer separator forming apparatus characterized by:

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