Water jetting device and electrode drying apparatus including the same

Abstract

The present invention relates to a water injection device and an electrode drying device including the same, wherein the water injection device of the present invention includes a base portion, an injection portion including at least one injection nozzle for injecting fluid, and an adjustment portion that connects the injection portion to the base portion and moves the injection portion linearly and rotationally around the base portion, wherein the injection nozzle is configured to move horizontally and vertically by the adjustment portion or to rotate in an arc.

Description

Technical Field

[0001] The present invention relates to a water injection device and an electrode drying device including the same, and more specifically, to a device capable of minimizing a heat wrinkle phenomenon that may occur during the process of drying an electrode sheet.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0191015 filed on December 26, 2023, and all the contents disclosed in the literature of the Korean patent application are included as part of this specification.

Background Art

[0003] Currently widely used types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, nickel zinc batteries, etc.

[0004] Such secondary batteries are generally formed by housing an electrode assembly, an electrolyte, etc. in a battery case.

[0005] Here, the electrode assembly generally includes a jelly roll type assembly having a structure in which a separator is interposed between a long sheet-like positive electrode and a negative electrode and then wound, or a stack type assembly having a structure in which a rectangular positive electrode and a negative electrode are laminated with a separator interposed therebetween, a stack folding type assembly in which unit cells are wound by a long separation film, or a lamination stack type assembly in which battery cells are laminated with a separator interposed therebetween and adhered to each other.

[0006] In addition to the generally used liquid electrolyte, the electrolyte may also be replaced with a solid electrolyte or a gel-like quasi-solid electrolyte showing an intermediate form between liquid and solid by adding an additive to the solid electrolyte.

[0007] The electrode assemblies described above are housed in a battery case, and depending on the type of battery case, they can be classified into cylindrical batteries and rectangular batteries, in which the electrode assemblies are housed in cylindrical or rectangular metal cans, and pouch batteries, in which the electrode assemblies are housed in a pouch-type case made of aluminum laminate sheet.

[0008] On the other hand, one method for manufacturing electrodes for such secondary batteries involves processes such as dispersing active material, conductive material, and binder in a solvent to produce a slurry, applying it to an electrode current collector, and then drying it.

[0009] One method for drying electrodes is to load the electrode sheets, which are manufactured in sheet form, onto a roll and then place them in a drying device. However, in this case, the sheets are stacked during the drying process, which presents a problem as it results in differences in the degree of drying between the inside and outside of the device.

[0010] Therefore, conventionally, electrode sheets are passed through an empty oven, and the drying device inside the oven is activated to dry the passing electrode sheets.

[0011] However, when drying is performed using the method described above, excessive heat may be transferred to areas where the slurry is not applied, potentially causing heat wrinkles.

[0012] Conventionally, various attempts have been made to solve the problem of thermal wrinkles occurring in uncoated areas of electrode sheets where slurry is not applied, as described above, but no significant results have been achieved. [Prior art documents] [Patent Documents]

[0013] [Patent Document 1] Korean Published Patent No. 10-2023-0067927 [Overview of the Initiative] [Problems that the invention aims to solve]

[0014] Therefore, the present invention was devised to solve the above-mentioned problems, and aims to provide an apparatus that can minimize the thermal wrinkling phenomenon that may occur during the drying process of electrode sheets.

[0015] Other objects and advantages of the present invention can be understood from the following description and more clearly from the embodiments of the present invention. Furthermore, it is readily apparent that the objects and advantages of the present invention can be achieved by the means and combinations thereof as described in the claims. [Means for solving the problem]

[0016] The present invention provides a water injection device comprising a base portion, an injection portion including at least one injection nozzle for injecting fluid, and an adjustment portion that connects the injection portion to the base portion and moves the injection portion linearly and rotationally around the base portion, wherein the injection nozzle is configured to move horizontally and vertically, or rotate in an arc, by the adjustment portion.

[0017] The injection unit may include a support bar that extends horizontally, a support plate that extends along the longitudinal direction of the support bar and has bent ends, and an injection nozzle that is connected to the support bar.

[0018] Multiple injection nozzles may be attached to the support bar, and the injection nozzles may be arranged to be spaced apart at predetermined intervals along the longitudinal direction of the support bar.

[0019] The support plate may have bent ends that connect to both ends of the support bar.

[0020] The adjustment section may include a pair of connecting members connected to both ends of the support plate, and a support base connecting each connecting member to the base section.

[0021] The connecting member includes a slit formed to extend in the vertical direction, and the support plate can include a first fixing pin and a second fixing pin respectively configured to be inserted into the slit of the connecting member at both ends.

[0022] The slit includes a vertically extending linear vertical movement slit and an arcuately extending arc movement slit. The connecting member is located on one side of the support plate and can include a first connecting member including the vertical movement slit, and a second connecting member located on the other side of the support plate and including the arc movement slit.

[0023] The support base includes a first support base axially coupled to the first connecting member and a second support base coupled to the second connecting member. The second support base includes a main slit formed to extend in the vertical direction, and the second connecting member can include a third fixing pin configured to be inserted into the main slit of the second support base.

[0024] The support plate is guided by the vertical movement slit of the first connecting member and the main slit of the second support base to move in the vertical direction, and can be guided by the arc movement slit of the second connecting member to rotate about the rotation axis.

[0025] The base portion includes a guide rail extending along the width direction at the upper part, and the support base may be coupled to the guide rail slidably in the width direction of the base portion.

[0026] A water pipe to which water is supplied and an air pipe to which air is supplied are connected to one injection nozzle included in the injection unit, and the injection nozzle can further include an adjustment valve for controlling the flow of the fluid in the water pipe and the air pipe.

[0027] According to the present invention, there is provided an electrode drying device for drying an electrode sheet.

[0028] The electrode drying apparatus is characterized by comprising an oven body including a sheet inlet / outlet that is open for an electrode sheet to pass through, and a water spraying device according to claim 1 that sprays either water or air onto the electrode sheet passing through the sheet inlet / outlet inside the oven body.

[0029] The oven body may further include a drying unit that transfers high-temperature heat to the electrode sheet to dry the electrode sheet.

[0030] The drying unit may include at least one of an infrared tube that emits infrared rays and a hot air nozzle that emits hot air. [Effects of the Invention]

[0031] According to the present invention, electrode sheets can be dried efficiently.

[0032] Furthermore, according to the present invention, the thermal wrinkling phenomenon of the electrode sheet can be minimized, thereby improving the efficiency of the process. [Brief explanation of the drawing]

[0033] [Figure 1] This is a perspective view of the water injection device of the present invention. [Figure 2] This is another perspective view of the water injection device of the present invention. [Figure 3] These are a plan view and a front view of the water injection device of the present invention. [Figure 4] This is a perspective view of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 5] This is another perspective view of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 6] This is a side view of one side of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 7] This is a side view of the other side of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 8] This is an illustrative diagram showing the vertical movement of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 9] Figure 8 is a perspective view showing the movement of the injection unit and the adjustment unit. [Figure 10] Figure 8 is another perspective view showing the movement of the injection unit and the adjustment unit. [Figure 11] This is an illustrative diagram showing the rotational movement of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 12] Another illustrative diagram showing the rotational movement of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 13] This is a side view showing the rotational movement of the injection unit and adjustment unit included in the water injection device of the present invention. [Figure 14] This is a plan view of a water injection device showing the horizontal movement of the injection unit and the adjustment unit of the present invention. [Figure 15] This is a perspective view of the injection nozzle included in the injection unit of the present invention. [Figure 16] This is an illustrative diagram of the operation of the water injection device of the present invention. [Figure 17] This is another illustrative diagram of the operation of the water injection device of the present invention. [Figure 18] This is another illustrative diagram showing the operation of the water injection device of the present invention. [Figure 19] This is a perspective view of the electrode drying apparatus of the present invention. [Figure 20] This is a schematic diagram illustrating a drying unit included in the electrode drying apparatus of the present invention. [Modes for carrying out the invention]

[0034] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. As a premise, terms and words used herein and in the claims should not be interpreted in a manner limited to their usual or dictionary meanings, but rather in a manner consistent with the technical idea of ​​the present invention, based on the principle that inventors may appropriately define the concepts of terms in order to best describe their own invention.

[0035] Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention; thus, there may be a variety of equivalents and modifications that can be substituted for them at the time of filing.

[0036] Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, such detailed description will be omitted.

[0037] Since embodiments of the present invention are provided to give a more complete explanation to an ordinary person, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes and proportions.

[0038] In the present invention, "slit" refers collectively to a through-hole having a long axis with a length in one direction and a short axis with a length perpendicular to the long axis, and includes cases where the shape is rectangular, elliptical, or bead-shaped.

[0039] The present invention relates to a water injection device and an electrode drying apparatus including the same, characterized in that the water injection device of the present invention is capable of selectively injecting water and air, and the injection nozzle included in the water injection device of the present invention is configured to be freely movable.

[0040] Figures 1 to 18 relate to the water injection device of the present invention, and Figures 19 and 20 relate to the electrode drying device of the present invention.

[0041] Specific embodiments of the water injection device and electrode drying apparatus including the same of the present invention will be described in detail below with reference to the attached drawings. For reference, the forward / backward and up / down / left / right directions used to specify relative positions in the following description are for the purpose of aiding the understanding of the invention, and unless otherwise specified, the directions shown in the drawings shall be used as the reference.

[0042] Here, the longitudinal direction of an object refers to the direction of the axis with the longer length among the horizontal and vertical axes of the object. The width direction of an object refers to the direction of the axis with the shorter length among the horizontal and vertical axes of the object.

[0043] <Water injection device 1000> Figure 1 is a perspective view of the water injection device 1000 of the present invention, Figure 2 is another perspective view of the water injection device 1000 of Figure 1 observed from a different direction, and Figure 3 is a plan view and a front view of the water injection device 1000 of the present invention. (However, in Figure 3, a portion of the base plate 110 has been cut away for ease of understanding.)

[0044] The water injection device 1000 of the present invention includes a base, an injection unit 200, and an adjustment unit 300, as shown in Figures 1 to 3.

[0045] The base section includes a base plate 110 that serves to support the lower parts of the injection section 200 and the adjustment section 300.

[0046] The base plate 110 may be formed into various shapes, and may be a basket shape with its edges bent upwards, as shown in Figures 1 to 3.

[0047] A separate drainage hole 112 may be formed at the bottom of the base plate 110, from which liquids such as water can be discharged.

[0048] The base plate 110 includes a pair of guide rails 111 extending along the width direction of the base plate 110 at its top.

[0049] The injection unit 200 and the adjustment unit 300 are connected to the base plate 110 by the guide rail 111.

[0050] Figure 4 is a perspective view of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention, Figure 5 is another perspective view of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention, Figure 6 is a side view of one side of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention, and Figure 7 is a side view of the other side of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention.

[0051] The injection unit 200 includes at least one injection nozzle 210 for injecting fluid.

[0052] The injection unit 200 includes a support bar 220, a support plate 230, and an injection nozzle 210. More specifically, the injection unit 200 includes a support bar 220 formed to extend horizontally, a support plate 230 extending along the longitudinal direction of the support bar 220 with both ends bent, and an injection nozzle 210 coupled to the support bar 220.

[0053] Multiple injection nozzles 210 are connected to a single support bar 220, as shown in Figures 1 to 5. Specifically, the injection nozzles are arranged to be spaced apart at predetermined intervals along the longitudinal direction of the support bar 220.

[0054] The injection nozzle 210 is coupled to the support bar 220 so as to be fixed on the support bar 220 and not shake. Therefore, the injection nozzle 210 and the support bar 220 may be manufactured as a single unit.

[0055] The injection nozzle 210 injects fluid supplied from the outside through its opening. At this time, the fluid flows into the injection nozzle 210 through a transfer pipe connected to one side of the injection nozzle 210.

[0056] The support plate 230 serves to support the support bar 220.

[0057] As shown in Figure 4, the bent ends of the support plate 230 connect to both ends of the support bar 220. Therefore, each injection nozzle 210 connected to the support bar 220 moves in conjunction with the movement of the support plate 230. In other words, the injection position of the fluid injected through the injection nozzles 210 can be adjusted by moving the support plate 230.

[0058] The adjustment unit 300 connects the injection unit 200 to the base unit and plays a role in moving the injection unit 200 linearly and rotationally around the base unit. In other words, the adjustment unit 300 is the part that is directly connected to the guide rail 111 of the base plate 110.

[0059] The adjustment unit 300 includes a connecting member 310 and a support base 320, as shown in Figures 1 to 7. More specifically, the adjustment unit 300 includes a pair of connecting members 310 that connect to both ends of the support plate 230, and a support base 320 that connects each connecting member 310 to the base plate 110.

[0060] The connecting member 310 includes a first connecting member 310a located on one side of the support plate 230 and a second connecting member 310b located on the other side of the support plate 230.

[0061] Furthermore, the support base 320 includes a first support base 320a connected to the first connecting member 310a and a second support base 320b connected to the second connecting member 310b.

[0062] The connecting member 310 includes a slit that extends in the vertical direction. The support plate 230 and the connecting member 310 are connected via the slit. Specifically, the support plate 230 includes fixing pins at both ends that are configured to be insertable into the slit of the connecting member 310. More specifically, the fixing pins are included at the outer end of the support plate 230, i.e., the surface facing the connecting member 310.

[0063] The fixing pin is shaped to protrude so that it can be inserted into the slit of the connecting member 310.

[0064] The fixing pin is configured to move guided by the slit shape. Therefore, the support plate 230 moves in conjunction with the fixing pin as it moves guided by the slit in the connecting member 310.

[0065] The slits in the connecting member 310 include a vertically moving slit S1 that extends in a straight line and an arc-shaped moving slit S2 that extends in an arc.

[0066] The pair of connecting members 310, positioned on both sides of the support plate 230, each include slits of different shapes.

[0067] Specifically, the first connecting member 310a includes a vertically moving slit S1 as shown in Figure 6, and the second connecting member 310b includes an arc-shaped moving slit S2 as shown in Figure 7.

[0068] More specifically, the first connecting member 310a includes a pair of vertically movable slits S1 formed side by side at a predetermined distance apart, and the second connecting member 310b includes a pair of arc-shaped movable slits S2 spaced apart in a symmetrical manner.

[0069] The fixing pins of the support plate 230 include a first fixing pin P1 inserted into the vertical movement slit S1 of the first connecting member 310a and a second fixing pin P2 inserted into the arc movement slit S2 of the second connecting member 310b.

[0070] Therefore, the first fixed pin P1 inserted into the vertical movement slit S1 is configured to reciprocate only in the vertical direction, and the second fixed pin P2 inserted into the arc movement slit S2 is configured to reciprocate in an arc.

[0071] The first support base 320a is axially coupled to the first connecting member 310a. Therefore, the first connecting member 310a is configured to be rotatable around the rotation axis Ax, which is the part that is coupled to the first support base 320a.

[0072] The second support base 320b includes a main slit S3 that extends in the vertical direction, and the second connecting member 310b is connected to the second support base 320b via the main slit S3. Specifically, the second connecting member 310b includes a third fixing pin P3 on one surface facing the main slit S3, which is configured to be insertable into the main slit S3 of the second support base 320b, and the second connecting member 310b is connected to the second support base 320b when the third fixing pin P3 is inserted into the main slit.

[0073] The injection nozzle 210 of the present invention is characterized by being configured to move horizontally and vertically by an adjustment unit 300, or to rotate in an arc.

[0074] Figure 8 is an illustrative diagram showing the vertical movement of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention, Figure 9 is a perspective view showing the movement of the injection unit 200 and adjustment unit 300 in Figure 8, and Figure 10 is another perspective view showing the movement of the injection unit 200 and adjustment unit 300 in Figure 8.

[0075] As shown in Figures 8 to 10, the support plate 230 moves vertically, guided by the vertical movement slit S1 of the first connecting member 310a and the main slit S3 of the second support base 320b.

[0076] Specifically, when the support plate 230 is moved upward as shown in Figures 8 and 9, only the second connecting member 310b moves upward together with the support plate 230. Specifically, the second connecting member 310b, which is connected to one side of the support plate 230, moves upward relative to the second support base 320b, while simultaneously, the other side of the support plate 230 moves directly upward relative to the first connecting member 310a. At this time, the first connecting member 310a is axially connected to the first support base 320a, so its vertical movement is restricted.

[0077] Conversely, when the support plate 230 is moved downward as shown in Figures 8 and 10, similarly, only the second connecting member 310b moves downward together with the support plate 230. Specifically, the second connecting member 310b, which is connected to one side of the support plate 230, moves downward with respect to the second support base 320b, while the other side of the support plate 230 moves directly downward with respect to the first connecting member 310a. At this time, the first connecting member 310a is axially connected to the first support base 320a, so its vertical movement is restricted.

[0078] The support plate 230 moves vertically by the movement of the first fixing pin P1, which is configured to slide into the vertical movement slit S1 of the first connecting member 310a.

[0079] As shown in Figure 8, the second connecting member 310b moves vertically by the movement of the third fixing pin P3, which is configured to slide into the main slit S3 of the second support base 320b.

[0080] Therefore, when adjusting the height of the injection nozzle 210, the support plate 230 and the second connecting member 310b, which is coupled to one side of the support plate 230, are moved simultaneously.

[0081] Figure 11 is an illustrative diagram showing the rotational movement of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention, Figure 12 is another illustrative diagram showing the rotational movement of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention, and Figure 13 is a side view showing the rotational movement of the injection unit 200 and adjustment unit 300 included in the water injection device 1000 of the present invention.

[0082] As shown in Figures 11 to 13, the support plate 230 is guided by the arc-shaped moving slit S2 of the second connecting member 310b and rotates around the rotation axis Ax.

[0083] Specifically, when the support plate 230 is rotated as shown in Figures 11 to 13, only the first connecting member 310a rotates together with the support plate 230.

[0084] The third fixing pin P3 included on one side of the support plate 230 is inserted into the vertical movement slit S1 of the first connecting member 310a, thus restricting its rotational movement. Similarly, the second connecting member 310b, connected to the other side of the support plate 230, is also restricted from rotational movement because the third fixing pin P3 is inserted into the main slit S3.

[0085] However, on the other side of the support plate 230, since the second fixing pin P2 is inserted into the arc-moving slit S2, the second fixing pin P2 rotates in conjunction with the sliding of the arc-moving slit S2. At this time, the second fixing pin P2 inserted into one of the pair of arc-moving slits S2 slides upward, and the second fixing pin P2 inserted into the other slides downward.

[0086] Furthermore, since the first connecting member 310a is axially connected to the first support base 320a, it rotates together with the support plate 230 around the rotation axis Ax.

[0087] In other words, the support plate 230 rotates due to the movement of the second fixing pin P2, which is configured to slide into the arc-shaped moving slit S2 of the second connecting member 310b, and the rotation of the first connecting member 310a, which rotates on the rotation axis Ax of the first support base 320a.

[0088] Therefore, when adjusting the tilt angle of the injection nozzle 210, the support plate 230 and the first connecting member 310a, which is coupled to one side of the support plate 230, are rotated simultaneously.

[0089] Figure 14 is a plan view of the water injection device 1000 showing the horizontal movement of the injection unit 200 and the adjustment unit 300 of the present invention.

[0090] The base plate 110 includes guide rails 111 extending along the width direction at its top, as shown in Figures 1 to 3 and Figure 14. More specifically, the base plate 110 includes a pair of guide rails 111 corresponding to both ends of the support plate 230.

[0091] The support base 320 is connected to the guide rail 111 so as to be slidable in the width direction of the base plate 110.

[0092] Therefore, the support plate 230, together with the connecting members 310 connected on both sides, slides horizontally in relation to the support base 320.

[0093] Figure 15 is a perspective view of the injection nozzle 210 included in the injection unit 200 of the present invention.

[0094] The water injection device 1000 of the present invention is capable of selectively injecting water and air through a single injection nozzle 210. That is, the injection nozzle 210 of the present invention may be connected to at least two or more transport pipes through which fluid is supplied, and a single injection nozzle 210 can selectively inject fluid supplied through multiple transport pipes.

[0095] One of the injection nozzles 210 included in the injection unit 200 is connected to a water pipe 240a that supplies water and an air pipe 240b that supplies air, as shown in Figure 15.

[0096] The injection nozzle 210 further includes a control valve (not shown) that controls the fluid flow in the water pipe 240a and the air pipe 240b, and the water and air injection patterns can be adjusted by operating the control valve.

[0097] Figure 16 is an illustrative diagram of the operation of the water injection device 1000 of the present invention.

[0098] As shown in Figure 16, the control valves are operated so that all injection nozzles 210 are connected only to the water pipe 240a, and therefore only water is injected into each injection nozzle 210. In this case, the humidity can be increased by increasing the amount of moisture in the space where the water injection device 1000 is located.

[0099] Figure 17 is another illustrative diagram of the operation of the water injection device 1000 of the present invention.

[0100] As shown in Figure 17, the control valves are operated so that all injection nozzles 210 communicate only with the air pipe 240b, and therefore only air is injected from each injection nozzle 210. In this case, if the amount of moisture in the space where the water injection device 1000 is located is too high, the humidity can be reduced by increasing the amount of air injected.

[0101] Figure 18 is another illustrative diagram of the operation of the water injection device 1000 of the present invention.

[0102] As shown in Figure 18, the control valves are operated so that only the water pipe 240a is connected to some of the multiple injection nozzles 210, and the control valves are operated so that only the air pipe 240b is connected to the remaining nozzles. In this case, humidity control can be performed more precisely by finely adjusting the amount of water and air injected through a single water injection device 1000.

[0103] <Electrode drying device 1> Figure 19 is a perspective view of the electrode drying apparatus 1 of the present invention.

[0104] The electrode drying apparatus 1 of the present invention performs the function of drying the electrode sheet Sh that is being transported.

[0105] Specifically, the electrode sheet Sh includes a sheet-shaped current collector and an electrode slurry coated on the current collector.

[0106] The electrode slurry is located on top of the electrode sheet Sh in Figure 19.

[0107] The electrode drying apparatus 1 includes an oven body 2000 and a water injection device 1000, as shown in Figure 19. The electrode drying apparatus 1 of the present invention further includes a drying unit 3000 that transfers high-temperature heat to the electrode sheet Sh to dry the electrode sheet Sh.

[0108] Specifically, the drying unit 3000 is responsible for drying the electrode slurry contained on top of the electrode sheet Sh. Therefore, the drying unit 3000 is preferably located on top of the electrode sheet Sh within the oven body 2000.

[0109] Figure 20 is a schematic diagram that simply shows the drying unit 3000 included in the electrode drying apparatus 1 of the present invention.

[0110] The drying unit 3000 may be of various types, but typically it may include at least one of an infrared tube that emits infrared rays and a hot air nozzle that emits hot air, as shown in Figure 20.

[0111] The oven body 2000 includes a sheet entrance E that is open for the electrode sheet Sh to pass through.

[0112] The sheet inlets and outlets E are formed on the oven body 2000 so as to face each other, and the electrode sheet Sh, which is transported in one direction, is transported to the sheet inlet and outlet E on the opposite side through the sheet inlet and outlet E formed on one side of the oven body 2000.

[0113] The water injection device 1000 can directly adjust the humidity inside the oven body 2000 to control the environment in which the electrode sheet Sh is dried, and can also serve to cool the electrode sheet Sh by directly spraying water or air onto it.

[0114] In other words, the water injection device 1000 directly sprays either water or air onto the electrode sheet Sh as it passes through the sheet inlet / outlet E in order to prevent the formation of thermal wrinkles when an excessive amount of heat is transferred to a part of the electrode sheet Sh by the drying unit 3000 or the like.

[0115] In this case, the area where thermal wrinkles may occur may vary depending on the size and type of the electrode sheet Sh and the output and type of the drying unit 3000. Therefore, the position where water and air are concentrated must be adjusted each time, but the electrode drying apparatus 1 of the present invention can move the spray nozzle 210 in all directions, so the spray direction can be freely controlled.

[0116] For example, the support plate 230 of the water injection device 1000 can be moved vertically to adjust the range of fluid injection toward the electrode sheet Sh. Alternatively, the support plate 230 can be rotated or moved horizontally to concentrate the fluid injection onto a portion of the electrode sheet Sh.

[0117] The present invention has been described in more detail above with reference to the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. Therefore, at the time of filing, there may be a variety of equivalents and modifications that can substitute for them. [Explanation of Symbols]

[0118] 1: Electrode drying device 1000: Water injection device 2000: Oven unit 3000: Drying Unit 110: Base plate 111: Guide rail 112: Drainage Hole 200: Injection part 210: Spray nozzle 220: Support bar 230: Support plate 240a: Water pipe 240b: Air tube 300: Adjustment section 310: Connecting member 310a: First connecting member 310b: Second connecting member 320: Support stand 320a: 1st support stand 320b:Second support stand S1: Vertical moving slit S2: Arc-shaped moving slit S3: Main slit P1: First fixed pin P2: Second fixing pin P3: Third fixed pin Ax: Rotation axis Sh: Electrode Sheet E: Seat entrance / exit

Claims

1. The base part, An injection unit including at least one injection nozzle for injecting fluid, The injection unit is connected to the base unit, and includes an adjustment unit that moves the injection unit linearly and rotationally around the base unit, A water injection device in which the injection nozzle is configured to move horizontally and vertically, or rotate in an arc, by the adjustment unit.

2. The aforementioned injection unit is A support bar that extends horizontally and is formed, A support plate extending along the longitudinal direction of the support bar, with both ends bent, The water spraying device according to claim 1, further comprising a spray nozzle coupled to the support bar.

3. Multiple injection nozzles are attached to the support bar. The water spraying device according to claim 2, wherein the spray nozzles are arranged to be spaced apart at predetermined intervals along the longitudinal direction of the support bar.

4. The water spraying device according to claim 2, wherein the support plate has bent ends that are connected to both ends of the support bar.

5. The base portion includes a base plate, The adjustment unit is A pair of connecting members connected to both ends of the support plate, A water spray device according to any one of claims 2 to 4, comprising a support base that connects each connecting member to the base plate.

6. The connecting member includes a slit that extends in the vertical direction, The water spray device according to claim 5, wherein the support plate includes a first fixing pin and a second fixing pin, which are configured to be insertable into the slits of the connecting member at both ends.

7. The aforementioned slit is A vertically moving slit extending in a straight line, It includes an arc-shaped moving slit, The aforementioned connecting member is Located on one side of the support plate, the first connecting member includes the vertical movement slit, The water spray device according to claim 6, further comprising a second connecting member located on the other side of the support plate and including the arc-shaped movable slit.

8. The aforementioned support base is The first support base is axially connected to the first connecting member, The second support base is connected to the second connecting member, The second support base includes a main slit that extends in the vertical direction, The water spraying device according to claim 7, wherein the second connecting member includes a third fixing pin configured to be insertable into the main slit of the second support base.

9. The water spray device according to claim 8, wherein the support plate moves vertically guided by the vertical movement slit of the first connecting member and the main slit of the second support base, and rotates about the rotation axis guided by the arc movement slit of the second connecting member.

10. The base plate includes a guide rail extending along the width direction at its top, The water jet device according to claim 5, wherein the support base is coupled to the guide rail so as to be slidable in the width direction of the base plate.

11. One of the injection nozzles included in the injection unit is connected to a water pipe through which water is supplied and an air pipe through which air is supplied. The water injection device according to any one of claims 1 to 4, wherein the injection nozzle further includes a control valve for controlling the fluid flow in the water pipe and the air pipe.

12. An electrode drying apparatus for drying electrode sheets, The oven body includes a sheet entrance / exit with an opening for the electrode sheet to pass through, An electrode drying apparatus comprising a water spraying device according to any one of claims 1 to 4, which sprays either water or air onto an electrode sheet passing through the sheet inlet / outlet inside the oven body.

13. The electrode drying apparatus according to claim 12, wherein the oven body further includes a drying unit that transfers high-temperature heat to the electrode sheet to dry the electrode sheet.

14. The electrode drying apparatus according to claim 13, wherein the drying unit includes at least one of an infrared tube that emits infrared rays and a hot air nozzle that emits hot air.

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