Fluid ejection device for drying electrode sheets and electrode sheet drying device including the same

Abstract

According to an exemplary embodiment, there is provided a fluid ejection device for drying an electrode sheet, the fluid ejection device including a fluid storage tank, a plurality of flow paths connected to the fluid storage tank so as to be in fluid communication with the fluid storage tank, a first side nozzle coupled to one of the plurality of flow paths, a second side nozzle coupled to one of the plurality of flow paths, and at least one center nozzle coupled to one of the plurality of flow paths, wherein the first side nozzle, the second side nozzle, and the center nozzle are configured to be movable in a first direction perpendicular to the MD direction of the electrode sheet.

Description

[Technical Field]

[0001] This disclosure claims the benefit of priority to Korean Patent Application No. 10-2023-0074587, filed June 12, 2023, the entire contents of which are incorporated herein by reference.

[0002] The technical idea of ​​the present invention relates to a fluid ejection device for drying an electrode sheet and an electrode sheet drying device including the same.

[0003] More specifically, the technical idea of ​​the present invention relates to a fluid ejection device for drying an electrode sheet, which can solve the stress concentration phenomenon that appears in the non-coated portion, thereby preventing the occurrence of wrinkles and cracks in the electrode sheet, and which can be used to dry different electrode sheets having different patterns of the non-coated portion, and an electrode sheet drying device including the same. [Background technology]

[0004] The electrode can be manufactured through a coating process in which the electrode slurry is coated onto a current collector, and a drying process in which the fluid in the electrode slurry is removed.

[0005] In the coating process, the electrode slurry is not applied to all surfaces of the current collector. This is because the tabs that serve as the electron transfer paths in the electrode must be bonded to the current collector. Therefore, the electrode sheet that has undergone the coating process will have coated portions on the current collector where the electrode slurry is coated and uncoated portions on the current collector where the electrode slurry is not coated.

[0006] During the drying process, the coated and uncoated areas shrink differently. The coated areas are coated with electrode slurry and shrink due to heat, but the uncoated areas are not coated with electrode slurry and do not shrink due to heat. This causes stress concentration in the uncoated areas due to shrinkage of the coated areas. The stress concentration in the uncoated areas causes wrinkles and cracks in the electrode sheet, reducing the quality of the electrode sheet. Summary of the Invention [Problem to be solved by the invention]

[0007] The problem to be solved by the technical concept of the present invention is to solve the stress concentration phenomenon that appears in the non-coated portion and to prevent the occurrence of wrinkles and cracks in the electrode sheet. [Means for solving the problem]

[0008] To solve the above-mentioned problems, an exemplary embodiment of the present invention provides a fluid ejection device for drying an electrode sheet, which includes a fluid storage tank, a plurality of flow paths connected to the fluid storage tank so as to be in fluid communication with the fluid storage tank, a first side nozzle coupled to one of the plurality of flow paths, a second side nozzle coupled to one of the plurality of flow paths, and at least one center nozzle coupled to one of the plurality of flow paths, wherein the first side nozzle, the second side nozzle, and the center nozzle are configured to be movable in a first direction perpendicular to the MD (machine direction) of the electrode sheet.

[0009] The fluid injection device for drying the electrode sheet further includes a cover that at least partially houses the plurality of flow paths, the cover including a first slot and a second slot, the first side nozzle and the second side nozzle passing through the first slot, and the center nozzle passing through the second slot.

[0010] Each of the first slot and the second slot may be extended in a first direction.

[0011] The dimension of the first slot in the first direction may be the same as or greater than the dimension of the second slot in the first direction.

[0012] The center nozzle may be located between the first side nozzle and the second side nozzle in the first direction.

[0013] The number of center nozzles may be two or more.

[0014] Each of the plurality of channels may include silicone or rubber.

[0015] The fluid ejection device for drying the electrode sheet may further include a control device configured to selectively supply fluid to the plurality of flow paths.

[0016] The control device can be configured such that, in an on state, it can supply fluid to the flow path coupled to the first side nozzle and the flow path coupled to the second side nozzle, and can cut off the supply of fluid to the flow path coupled to the center nozzle.

[0017] The control device can be configured to supply fluid to a flow path coupled to the first side nozzle, a flow path coupled to the second side nozzle, and a flow path coupled to the center nozzle in an off state.

[0018] The first direction may be the transverse direction (TD) of the electrode sheet.

[0019] According to an exemplary embodiment of the present invention to solve the above-mentioned problems, there is provided an electrode sheet drying apparatus including a transport unit that transports an electrode sheet, a drying unit that dries the electrode sheet transported by the transport unit, and a fluid ejection device that ejects a fluid onto the electrode sheet transported by the transport unit, wherein the fluid ejection device includes a fluid storage tank, a plurality of flow paths connected to fluidically communicate with the fluid storage tank, a first side nozzle coupled to one of the plurality of flow paths, a second side nozzle coupled to one of the plurality of flow paths, and at least one center nozzle coupled to one of the plurality of flow paths, wherein the first side nozzle, the second side nozzle, and the center nozzle are configured to be movable in a first direction perpendicular to the MD direction of the electrode sheet.

[0020] The center nozzle may be located between the first side nozzle and the second side nozzle in the first direction.

[0021] The number of center nozzles may be two or more.

[0022] The first side nozzle, the second side nozzle, and the center nozzle may each be configured to spray fluid onto a non-coated portion of the electrode sheet. [Effects of the Invention]

[0023] The fluid ejecting device for drying an electrode sheet according to an exemplary embodiment of the present invention can solve the stress concentration phenomenon that occurs in the non-coated portion, thereby preventing the occurrence of wrinkles and cracks in the electrode sheet.

[0024] The fluid ejection device for drying an electrode sheet according to an exemplary embodiment of the present invention can be used to dry different electrode sheets having different patterns of non-coated portions.

[0025] The effects that can be obtained from the exemplary embodiments of the present disclosure are not limited to the effects described above, and other effects not mentioned can be clearly derived and understood from the following description by a person having ordinary skill in the art to which the exemplary embodiments of the present disclosure belong. In other words, unintended effects accompanying the implementation of the exemplary embodiments of the present disclosure can also be derived from the exemplary embodiments of the present disclosure by a person having ordinary skill in the art. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a perspective view illustrating a fluid ejection device for drying an electrode sheet according to an exemplary embodiment of the present invention; [Figure 2] 1 is a conceptual diagram illustrating a fluid ejection device for drying an electrode sheet according to an exemplary embodiment of the present invention; [Figure 3] 1 is a conceptual diagram illustrating a fluid ejection device for drying an electrode sheet according to an exemplary embodiment of the present invention; [Figure 4] 1 is a conceptual diagram illustrating a fluid ejection device for drying an electrode sheet according to an exemplary embodiment of the present invention; [Figure 5] 1 is a conceptual diagram illustrating an electrode sheet drying device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As a premise, the terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that an inventor can appropriately define the concept of terms in order to best describe his or her invention.

[0028] Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and therefore there may be various equivalents and modifications that can replace them at the time of this application.

[0029] Furthermore, in the description of the present invention, if it is determined that a detailed description of related publicly known structures or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0030] The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and therefore the shapes and sizes of components in the drawings may be exaggerated, omitted, or shown in a schematic manner for clearer explanation. Therefore, the sizes and proportions of each component do not completely reflect the actual sizes and proportions.

[0031] FIG. 1 is a perspective view illustrating a fluid ejecting device 100 for drying an electrode sheet according to an exemplary embodiment of the present invention.

[0032] FIG. 2 is a conceptual diagram that schematically illustrates a fluid ejection device 100 for drying an electrode sheet according to an exemplary embodiment of the present invention.

[0033] 2 , the electrode sheet 400 may include a current collector 410 and an electrode slurry 420. In some embodiments, the electrode slurry 420 may be applied to one side of the current collector 410. In some embodiments, the electrode slurry 420 may be applied to both sides of the current collector 410. The portion of the current collector 410 of the electrode sheet 400 where the electrode slurry 420 is applied may be referred to as a coated portion C. The portion of the current collector 410 of the electrode sheet 400 where the electrode slurry 420 is not applied may be referred to as a non-coated portion N. In some embodiments, the electrode sheet 400 may be a positive electrode sheet or a negative electrode sheet.

[0034] 1 and 2, the fluid ejection device 100 for drying an electrode sheet may include a fluid storage tank 110, a first flow path 120, a second flow path 130, a first side nozzle 121, a second side nozzle 122, a first center nozzle 131, a second center nozzle 132, a cover 140, a first slot 141, a second slot 142, and a control device 150. Referring to Fig. 2, the fluid ejection device 100 for drying an electrode sheet may eject a fluid onto an electrode sheet 400 being transported in the MD direction.

[0035] Hereinafter, the transverse direction (TD) of the electrode sheet 400 is defined as the X direction, the MD direction of the electrode sheet 400 is defined as the Y direction, and the direction substantially perpendicular to the electrode sheet 400 is defined as the Z direction. The X direction, Y direction, and Z direction may be substantially perpendicular to each other.

[0036] The fluid storage tank 110 may provide a space in which a fluid can be stored. In some embodiments, the shape of the fluid storage tank 110 may be a cylinder or a rectangular prism. The fluid storage tank 110 may include a pump (not shown) that supplies the fluid inside the fluid storage tank 110 to the outside. The fluid storage tank 110 may include a pump control unit (not shown) that controls the operation of the pump (not shown). The pump control unit (not shown) may control the pump (not shown) to control the flow rate of the fluid supplied from the inside of the fluid storage tank 110 to the outside.

[0037] In some embodiments, the fluid may be water. In some embodiments, the fluid may be the same substance as the solvent of the electrode slurry. In some embodiments, the fluid may include an organic solvent such as N-methyl-2-pyrrolidone, dimethylformamide, acetone, dimethylacetamide, and mixtures thereof.

[0038] Each of the first flow path 120 and the second flow path 130 may be coupled to fluid communication with the fluid storage tank 110. In some embodiments, each of the first flow path 120 and the second flow path 130 may be directly coupled to the fluid storage tank 110 and supplied with fluid from the fluid storage tank 110. In some embodiments, each of the first flow path 120 and the second flow path 130 may branch off from a separate flow path directly coupled to the fluid storage tank 110 and be supplied with fluid from the fluid storage tank 110.

[0039] Each of the first flow path 120 and the second flow path 130 may include silicone or rubber. Each of the first flow path 120 and the second flow path 130 may be a silicone pipe, a silicone tube, a rubber pipe, or a rubber tube. In some embodiments, at least a portion of the first flow path 120 is movable in the X direction. In some embodiments, at least a portion of the second flow path 130 is movable in the X direction. In some embodiments, a portion of the first flow path 120 housed by the cover 140 is at least partially movable in the X direction. In some embodiments, a portion of the second flow path 130 housed by the cover 140 is at least partially movable in the X direction. The first flow path 120 can be moved in the X direction as needed. The second flow path 130 can be moved in the X direction as needed.

[0040] Each of the first side nozzle 121 and the second side nozzle 122 may be coupled to the first flow path 120. In some embodiments, each of the first side nozzle 121 and the second side nozzle 122 may be mated with a protrusion (not shown) that is located on a side surface of the first flow path 120 and protrudes from the side surface of the first flow path 120. In some embodiments, the protrusion (not shown) may protrude from the side surface of the first flow path 120 in the Y direction.

[0041] Each of the first side nozzle 121 and the second side nozzle 122 may include silicone or rubber.

[0042] Each of the first side nozzle 121 and the second side nozzle 122 can be supplied with fluid from the first flow path 120. Each of the first side nozzle 121 and the second side nozzle 122 can inject fluid onto a non-coating portion N of the electrode sheet 400 corresponding to the first side nozzle 121 and the second side nozzle 122 in the Z direction. Each of the first side nozzle 121 and the second side nozzle 122 can overlap in the Z direction with the non-coating portion N of the electrode sheet 400 corresponding to the first side nozzle 121 and the second side nozzle 122.

[0043] The following description will be given assuming that there are two center nozzles for ease of explanation. In some embodiments, the number of center nozzles may be one or more. In some embodiments, the number of center nozzles may be two or more. In some embodiments, the number of center nozzles may be three or more. In some embodiments, the number of center nozzles may be ten or less. In some embodiments, the number of center nozzles may be nine or less. In some embodiments, the number of center nozzles may be eight or less.

[0044] Each of the first center nozzle 131 and the second center nozzle 132 may be coupled to the second flow passage 130. In some embodiments, each of the first center nozzle 131 and the second center nozzle 132 may be mated with a protrusion (not shown) that is located on a side surface of the second flow passage 130 and protrudes from the side surface of the second flow passage 130. In some embodiments, the protrusion (not shown) may protrude from the side surface of the second flow passage 130 in the Y direction.

[0045] Each of the first center nozzle 131 and the second center nozzle 132 may include silicone or rubber.

[0046] The first center nozzle 131 and the second center nozzle 132 can each be supplied with fluid from the second flow path 130. The first center nozzle 131 and the second center nozzle 132 can each spray fluid onto a non-coating portion N of the electrode sheet 400 that corresponds to the first center nozzle 131 and the second center nozzle 132 in the Z direction. The first center nozzle 131 and the second center nozzle 132 can each overlap in the Z direction with the non-coating portion N of the electrode sheet 400 that corresponds to the first center nozzle 131 and the second center nozzle 132, respectively.

[0047] Each of the first side nozzle 121 and the second side nozzle 122 is movable in the X direction. In some embodiments, each of the first side nozzle 121 and the second side nozzle 122 can be moved in the X direction by moving the first flow path 120 in the X direction. In some embodiments, each of the first side nozzle 121 and the second side nozzle 122 can be moved in the Z direction to overlap a corresponding non-coating portion N of the electrode sheet 400. This allows each of the first side nozzle 121 and the second side nozzle 122 to spray fluid onto the non-coating portion N of the electrode sheet 400. When each of the first side nozzle 121 and the second side nozzle 122 is moved in the X direction, a distance d1 in the X direction between the first side nozzle 121 and the second side nozzle 122 can be substantially constant.

[0048] Each of the first center nozzle 131 and the second center nozzle 132 is movable in the X direction. In some embodiments, each of the first center nozzle 131 and the second center nozzle 132 can be moved in the X direction by moving the second flow path 130 in the X direction. In some embodiments, each of the first center nozzle 131 and the second center nozzle 132 can be moved in the Z direction so as to overlap with a non-coating portion N of the electrode sheet 400 corresponding to the first center nozzle 131 and the second center nozzle 132, respectively. This allows each of the first center nozzle 131 and the second center nozzle 132 to spray fluid onto the non-coating portion N of the electrode sheet 400 corresponding to the first center nozzle 131 and the second center nozzle 132, respectively. When each of the first center nozzle 131 and the second center nozzle 132 is moved in the X direction, the distance d2 in the X direction between the first center nozzle 131 and the second center nozzle 132 can be substantially constant.

[0049] 3 is a conceptual diagram illustrating a fluid ejection device 100 for drying an electrode sheet according to an exemplary embodiment of the present invention. In FIG. 3, the positions of the first center nozzle 131 and the second center nozzle 132 in the X direction are different from those in FIG. 2. This is because the positions of the non-coated portions N of the electrode sheet 400 in FIG. 3 are different from those in FIG. 2. As described above, if the positions of the non-coated portions N of the electrode sheet 400 are different, each of the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132 can be moved in the X direction to correspond to the different positions of the non-coated portions N of the electrode sheet 400.

[0050] The distance d2 in the X direction from the first center nozzle 131 to the second center nozzle 132 may be smaller than the distance d1 in the X direction from the first side nozzle 121 to the second side nozzle 122. The first center nozzle 131 and the second center nozzle 132 may each be located between the first side nozzle 121 and the second side nozzle 122.

[0051] Referring again to FIG. 1 , the cover 140 may at least partially accommodate each of the first flow path 120 and the second flow path 130. The cover 140 may protect and support each of the first flow path 120 and the second flow path 130. In some embodiments, the cover 140 may be in the form of a hollow cylinder or a hollow rectangular prism. The cover 140 may provide a path along which the first side nozzle 121 and the second side nozzle 122 move in the X direction while being fixed in the Y and Z directions. The cover 140 may provide a path along which the first center nozzle 131 and the second center nozzle 132 move in the X direction while being fixed in the Y and Z directions.

[0052] The cover 140 may include a first slot 141 and a second slot 142. In some embodiments, the planar shape of each of the first slot 141 and the second slot 142 may be a rectangle with rounded corners or a rectangle having a wide width and a narrow width.

[0053] The first side nozzle 121 and the second side nozzle 122 may pass through the first slot 141. In some embodiments, the dimension of the first slot 141 in the narrow width direction may be substantially the same as the dimension of each of the protrusions (not shown) on the side surface of the first flow path 120 that protrude from the side surface of the first flow path 120 in directions substantially perpendicular to the narrow width direction and the wide width direction. This allows the first slot 141 to fix the first side nozzle 121 and the second side nozzle 122, which are mated and coupled with the protrusions (not shown) of the first flow path 120, in the Z direction. In some embodiments, the dimension of the first slot 141 in the narrow width direction may be smaller than the dimension of each of the first side nozzle 121 and the second side nozzle 122 in the narrow width direction. This allows the first slot 141 to fix the first side nozzle 121 and the second side nozzle 122 in the Y direction. The first slot 141 can be a path along which the first side nozzle 121 and the second side nozzle 122 move in the X direction.

[0054] The first center nozzle 131 and the second center nozzle 132 may pass through the second slot 142. In some embodiments, the dimension of the second slot 142 in the narrow width direction may be substantially the same as the dimension of each of the protrusions (not shown) on the side surface of the second flow path 130 that protrude from the side surface of the second flow path 130 in directions substantially perpendicular to the narrow width direction and the wide width direction. This allows the second slot 142 to fix, in the Z direction, the first center nozzle 131 and the second center nozzle 132 that are mated and coupled with the protrusions (not shown) of the second flow path 130. In some embodiments, the dimension of the second slot 142 in the narrow width direction may be smaller than the dimension of each of the first center nozzle 131 and the second center nozzle 132 in the narrow width direction. This allows the second slot 142 to fix, in the Y direction, the first center nozzle 131 and the second center nozzle 132. The second slot 142 can be a path along which each of the first center nozzle 131 and the second center nozzle 132 moves in the X direction.

[0055] In some embodiments, the X-direction dimension of the first slot 141 may be substantially the same as the X-direction dimension of the second slot 142. In some embodiments, the X-direction dimension of the first slot 141 may be greater than the X-direction dimension of the second slot 142.

[0056] In some embodiments, the first slot 141 may be located higher in the Z direction than the second slot 142. In this case, the first side nozzle 121 and the second side nozzle 122 may be located higher in the Z direction than the first center nozzle 131 and the second center nozzle 132. In this case, the first side nozzle 121 and the second side nozzle 122 may be located farther from the electrode sheet 400 than the first center nozzle 131 and the second center nozzle 132, respectively.

[0057] In some embodiments, the first slot 141 may be located lower than the second slot 142 in the Z direction. In this case, the first side nozzle 121 and the second side nozzle 122 may be located lower than the first center nozzle 131 and the second center nozzle 132 in the Z direction. In this case, the first side nozzle 121 and the second side nozzle 122 may be located closer to the electrode sheet 400 than the first center nozzle 131 and the second center nozzle 132, respectively.

[0058] The control device 150 can be configured to selectively supply fluid to each of the first flow path 120 and the second flow path 130. A user can control the control device 150 in accordance with the pattern of the non-coated portions N of the electrode sheet 400.

[0059] The control device 150 can be configured to supply fluid to the first flow path 120 in an on state and to cut off the supply of fluid to the second flow path 130. When the control device 150 is in an on state, fluid is supplied to the first flow path 120, and therefore the fluid is supplied to each of the first side nozzle 121 and the second side nozzle 122. This allows each of the first side nozzle 121 and the second side nozzle 122 to spray fluid onto the non-coating portion N of the electrode sheet 400 corresponding to the first side nozzle 121 and the second side nozzle 122, respectively. When the control device 150 is in an on state, the supply of fluid to the second flow path 130 is cut off, and therefore the supply of fluid to each of the first center nozzle 131 and the second center nozzle 132 is cut off.

[0060] Fig. 4 is a conceptual diagram illustrating a fluid ejection device for drying an electrode sheet according to an exemplary embodiment of the present invention. Fig. 4 differs from Fig. 2 in the pattern of non-coated portions N of an electrode sheet 400. Fig. 4 illustrates the case where the control device 150 is in an on state, while Fig. 2 illustrates the case where the control device 150 is in an off state.

[0061] 4, the first side nozzle 121 and the second side nozzle 122 can overlap in the Z direction with the non-coated portion N of the electrode sheet 400 corresponding to the first side nozzle 121 and the second side nozzle 122, respectively. Referring to the arrows in FIG. 4, the first side nozzle 121 and the second side nozzle 122 can spray fluid onto the non-coated portion N of the electrode sheet 400 corresponding to the first side nozzle 121 and the second side nozzle 122, respectively. The first center nozzle 131 and the second center nozzle 132 can overlap in the Z direction with the coated portion C of the electrode sheet 400. Referring to the arrows in FIG. 4, because the supply of fluid to the first center nozzle 131 and the second center nozzle 132 is cut off, the first center nozzle 131 and the second center nozzle 132 do not need to spray fluid.

[0062] The control device 150 may be configured to supply fluid to each of the first flow path 120 and the second flow path 130 in an off state. When the control device 150 is in an off state, fluid is supplied to each of the first flow path 120 and the second flow path 130, and therefore fluid is supplied to each of the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132. As a result, each of the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132 can spray fluid onto the non-coating portions N of the electrode sheet 400 corresponding to the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132, respectively.

[0063] 2, the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132 can overlap in the Z direction with the non-coating portions N of the electrode sheet 400 corresponding to the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132, respectively. Referring to the arrows in FIG. 2, the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132 can spray fluid onto the non-coating portions N of the electrode sheet 400 corresponding to the first side nozzle 121, the second side nozzle 122, the first center nozzle 131, and the second center nozzle 132, respectively.

[0064] In some embodiments, the controller 150 may be located at a point where each of the first flow path 120 and the second flow path 130 branches off from a separate flow path directly connected to the fluid storage tank 110. In some embodiments, the controller 150 may be an AC solenoid valve, a DC solenoid valve, a ball valve, a butterfly valve, a globe valve, a gate valve, a diaphragm valve, or a three-way valve.

[0065] In some embodiments, the number of controllers 150 may be two or more, in which case a first controller may be located in the first flow path 120 and a second controller may be located in the second flow path 130. When the number of controllers 150 is two or more, each controller may, when in an on state, block the supply of fluid to its corresponding flow path, and, when in an off state, supply fluid to its corresponding flow path.

[0066] FIG. 5 is a conceptual diagram that schematically illustrates an electrode sheet drying device 10 according to an exemplary embodiment of the present invention.

[0067] Referring to FIG. 5, the electrode sheet drying device 10 may include a fluid ejection device 100 for drying an electrode sheet, a drying unit 200, a transport unit 300, and a housing 500, and an electrode sheet 400 may be transported inside the electrode sheet drying device 10.

[0068] The housing 500 may protect and support the fluid spraying device 100 for drying the electrode sheet, the drying unit 200, and the conveying unit 300. The housing 500 may provide an internal space 510 for drying the electrode sheet 400. Heat used to dry the electrode sheet 400 may circulate in the internal space 510 of the housing 500. The housing 500 may include an exhaust hole (not shown) configured to exhaust the heat used to dry the electrode sheet 400 to the outside.

[0069] An inlet 520 through which the electrode sheet 400 is inserted may be located on one side of the housing 500. An outlet 530 through which the electrode sheet 400 is ejected may be located on the other side of the housing 500. The inlet 520 and the outlet 530 may be located on opposite sides of each other in the Y direction.

[0070] The electrode sheet drying fluid ejecting device 100 is as described above, and therefore a duplicated description thereof will be omitted.

[0071] The drying unit 200 may supply heat energy to the electrode sheet 400 to remove the solvent or water in the electrode slurry 420. In some embodiments, the drying unit 200 may be a hot air supply heater.

[0072] The conveying unit 300 can convey the electrode sheet 400 in the Y direction. In some embodiments, the conveying unit 300 can include a plurality of rollers that rotate by receiving power from a motor (not shown). The electrode sheet 400 can be conveyed in the Y direction by the rotation of the plurality of rollers.

[0073] The respective arrangements and numbers of the fluid spraying devices 100 for drying electrode sheets and the drying units 200 disclosed in Fig. 5 are merely non-limiting examples. In some embodiments, the fluid spraying devices 100 for drying electrode sheets may be disposed inside the drying units 200. In some embodiments, the respective numbers of the fluid spraying devices 100 for drying electrode sheets and the drying units 200 may be two or more. In some embodiments, each of the fluid spraying devices 100 for drying electrode sheets and the drying units 200 may be disposed below the electrode sheet 400, different from those disclosed in Fig. 5.

[0074] The present invention has been described in more detail above through the drawings and embodiments, etc. However, the configurations shown in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, and therefore, at the time of filing this application, there may be various equivalents and modifications that can replace them. [Explanation of symbols]

[0075] 10: Electrode sheet drying device 100: Fluid injection device for drying electrode sheets 110: Fluid storage tank 120: First flow path 121, 122: Side nozzle 130: Second flow path 131, 132: Center nozzle 140: Cover 141, 142: Slots 150: Control device 200:Drying section 300:Transfer section 400: Electrode sheet 410: Current collector 420: Electrode slurry 500: Housing 510:Interior space 520: Inlet 530: Outlet C: Application area N: Non-coated area

Claims

1. a fluid storage tank; a plurality of fluid channels coupled in fluid communication with the fluid reservoir tank; a first side nozzle coupled to one of the plurality of flow paths; a second side nozzle coupled to one of the plurality of flow paths; at least one center nozzle coupled to one of the plurality of flow paths; The fluid ejecting device for drying an electrode sheet, wherein the first side nozzle, the second side nozzle, and the center nozzle are configured to be movable in a first direction perpendicular to the MD direction of the electrode sheet.

2. a cover at least partially containing the plurality of channels; the cover includes a first slot and a second slot; the first side nozzle and the second side nozzle pass through the first slot; The fluid ejecting device for drying an electrode sheet according to claim 1 , wherein the center nozzle passes through the second slot.

3. The fluid ejecting device for drying an electrode sheet according to claim 2 , wherein each of the first slot and the second slot extends in the first direction.

4. 4. The fluid injection device for drying an electrode sheet according to claim 3, wherein a dimension of the first slot in the first direction is the same as or larger than a dimension of the second slot in the first direction.

5. The fluid ejecting device for drying an electrode sheet according to claim 3 , wherein the center nozzle is located between the first side nozzle and the second side nozzle in the first direction.

6. The fluid ejecting device for drying an electrode sheet according to claim 1 , wherein the number of the center nozzles is two or more.

7. The fluid ejecting device for drying an electrode sheet according to claim 1 , wherein each of the plurality of flow paths includes silicone or rubber.

8. The fluid ejection device for drying an electrode sheet according to claim 1 , further comprising a control device configured to selectively supply fluid to the plurality of flow paths.

9. In an on state, the control device supplying a fluid to a flow path coupled to the first side nozzle and a flow path coupled to the second side nozzle; The fluid ejection device for drying an electrode sheet according to claim 8 , which is configured to cut off the supply of fluid to a flow path connected to the center nozzle.

10. In an off state, the control device 9. The fluid ejection device for drying an electrode sheet according to claim 8, configured to supply fluid to a flow path connected to the first side nozzle, a flow path connected to the second side nozzle, and a flow path connected to the center nozzle.

11. The fluid ejecting device for drying an electrode sheet according to claim 1 , wherein the first direction is a transverse direction of the electrode sheet.

12. a transfer unit that transfers the electrode sheet; a drying unit that dries the electrode sheet transported by the transport unit; a fluid ejection device that ejects a fluid onto the electrode sheet that is transferred by the transfer unit, The fluid ejection device is a fluid storage tank; a plurality of fluid channels coupled in fluid communication with the fluid reservoir tank; a first side nozzle coupled to one of the plurality of flow paths; a second side nozzle coupled to one of the plurality of flow paths; at least one center nozzle coupled to one of the plurality of flow paths; the first side nozzle, the second side nozzle, and the center nozzle are configured to be movable in a first direction perpendicular to the MD direction of the electrode sheet.

13. The electrode sheet drying device according to claim 12 , wherein the center nozzle is located between the first side nozzle and the second side nozzle in the first direction.

14. The electrode sheet drying device according to claim 12 or 13, wherein the number of the center nozzles is two or more.

15. 14. The electrode sheet drying device according to claim 12 or 13, wherein each of the first side nozzle, the second side nozzle, and the center nozzle is configured to spray fluid onto a non-coated portion of the electrode sheet.

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