Gas nozzle for drying electrode plate and electrode plate drying device comprising gas nozzle

Abstract

An embodiment of the present disclosure provides a gas nozzle for drying an electrode plate, comprising: a nozzle body having a flow space in which a drying gas flows, the flow space being formed between a first plate and a second plate spaced apart from the first plate in a first direction; at least one inflow hole formed in the first plate and configured to allow a drying gas to flow into the flow space from outside the nozzle body; and a plurality of injection holes formed in the second plate and injecting a drying gas from inside the flow space to the outside, the at least one inflow hole having a slit shape traversing the first plate in a second direction.

Description

Technical Field

[0001] The embodiments of the present disclosure generally relate to a gas nozzle for drying an electrode plate and an electrode plate drying device including the gas nozzle. The electrode plate manufactured by the gas nozzle and the electrode plate drying device including the gas nozzle of the present disclosure can be widely used in the field of secondary battery technology such as pouch-type secondary batteries and prismatic secondary batteries. Background Art

[0002] Unlike primary batteries, secondary battery cells can be charged and discharged, so they can be used in many fields such as digital cameras, mobile phones, laptops, hybrid vehicles, electric vehicles, energy storage devices, etc.

[0003] Secondary batteries are divided into pouch-type secondary batteries and can-type secondary batteries, and have a structure in which an electrode assembly and an electrolyte are contained inside a shell. The electrode assembly has a structure in which electrode plates and separators are alternately stacked. The electrode plate may include a positive plate and a negative plate. Generally, the electrode plate includes a sheet-shaped or film-shaped collector and a positive active material or a negative active material coated on the collector. For example, the negative plate may be formed by coating a negative active material on a copper sheet, and the positive plate may be formed by coating a positive active material on an aluminum sheet. The electrode plate is manufactured by a coating process in which the active material is coated on the collector and a drying process in which the active material is dried. The coating process and the drying process have a significant impact on the quality of the secondary battery.

[0004] In the drying process, the active material is dried by spraying a drying gas such as hot air onto the current collector sheet coated with the active material. In the drying process, if the flow rate and / or flow velocity of the drying gas deviates greatly depending on the position of the electrode plate, the dryness and drying efficiency differ depending on the position of the electrode plate, and there may be a problem that the quality of the electrode plate may be uneven.

[0005] In addition, if the flow rate and / or flow velocity of the drying gas vary greatly, cracks, warping, etc. may occur in the electrode plate depending on the position of the electrode plate, resulting in a decrease in the quality of the electrode plate. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] If the width of the electrode plate is narrow, the distance between the center and the two side parts of the electrode plate is short based on the width direction of the electrode plate, so the flow rate and / or flow velocity deviation between the center and the two side parts of the electrode plate may not be large. However, if the width of the electrode plate is wide, the flow rate and / or flow velocity difference between the center and the two side parts may be large along the width direction of the electrode plate (based on the width direction of the electrode plate). In this case, the drying deviation in the width direction of the electrode plate will increase, and the quality of the electrode plate will decrease.

[0008] According to an embodiment of the present disclosure, a gas nozzle for drying an electrode plate capable of reducing a flow rate and / or flow velocity deviation according to a position of an electrode plate and an electrode plate drying device including the gas nozzle are provided.

[0009] According to an embodiment of the present disclosure, a gas nozzle for drying an electrode plate capable of reducing a deviation in drying efficiency and drying quality according to a position of an electrode plate and an electrode plate drying device including the gas nozzle are provided.

[0010] According to an embodiment of the present disclosure, a gas nozzle for drying an electrode plate and an electrode plate drying device including the gas nozzle are provided, which can improve the quality of the electrode plate even if the electrode plate has a large width.

[0011] The electrode plate and the battery cell including the electrode plate manufactured by the electrode plate drying gas nozzle and the electrode plate drying device including the gas nozzle disclosed in the present invention can be widely used in electric vehicles, battery charging stations and other green technology fields such as solar power generation and wind power generation using batteries. In addition, the electrode plate and the battery cell including the electrode plate manufactured by the present invention can be used in eco-friendly electric vehicles or hybrid vehicles that prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0012] (II) Technical solution

[0013] According to the present disclosure, the electrode plate drying gas nozzle may include: a nozzle body having a flow space for drying gas to flow, the flow space being formed between a first plate and a second plate separated from the first plate in a first direction; at least one inflow hole formed in the first plate and configured to allow drying gas to flow into the flow space from outside the nozzle body; and a plurality of injection holes formed in the second plate and injecting the drying gas from inside the flow space to outside, the at least one inflow hole may have a slit shape that crosses the first plate in the second direction.

[0014] In an embodiment, the electrode plate drying gas nozzle may further include a guide plate disposed between the first plate and the second plate and configured to convert a flow direction of the drying gas flowing in through the at least one inflow hole.

[0015] In an embodiment, the second direction is a length direction of the nozzle body, and the guide plate may have a shape that crosses the nozzle body along the second direction, and may be disposed at a position facing the at least one inflow hole along the first direction (with the first direction as a reference).

[0016] In an embodiment, a first height between the guide plate and the first plate may be equal to or smaller than a second height between the guide plate and the second plate.

[0017] In an embodiment, a value of a first height between the guide plate and the first plate may be 1 / 2 or less of a second height between the guide plate and the second plate.

[0018] In an embodiment, the width of the guide plate may be greater than 10% and less than 90% of the width of the first plate.

[0019] In an embodiment, the plurality of injection holes may have a circular shape.

[0020] According to an embodiment of the present disclosure, an electrode plate drying device may include: a chamber, forming a gas supply space for the flow of drying gas for drying the electrode plate; and a plurality of gas nozzles, coupled to the chamber to communicate with the gas supply space of the chamber, the plurality of gas nozzles may include: a nozzle body, forming a flow space for the flow of drying gas between a first plate and a second plate separated from the first plate in a first direction; at least one inflow hole, formed in the first plate and configured to allow drying gas to flow into the flow space from outside the nozzle body; and a plurality of injection holes, formed in the second plate and injecting the drying gas in the flow space to the outside, the at least one inflow hole may have a slit shape that crosses the first plate along a second direction, i.e., the length direction of the nozzle body.

[0021] In an embodiment, the plurality of gas nozzles may further include a guide plate disposed between the first plate and the second plate and configured to convert a flow direction of the drying gas flowing in through the at least one inflow hole.

[0022] In an embodiment, the plurality of gas nozzles may have a shape extending along a second direction, i.e., a width direction of the electrode plate, and may be spaced apart in a third direction, i.e., a moving direction of the electrode plate, and the first direction, the second direction, and the third direction may be perpendicular to each other.

[0023] In an embodiment, the chamber may include: an inlet for supplying a drying gas from outside the chamber to the gas supply space; and a dispersion plate disposed between the inlet and the first plate, the dispersion plate may be configured to allow the drying gas to communicate between the inlet and the inlet hole.

[0024] In an embodiment, the inlet may be configured to supply the drying gas in the second direction, and the plurality of dispersion holes may have a slit shape that crosses the dispersion plate in the third direction.

[0025] In an embodiment, the inlet may be configured to supply the drying gas in the second direction, and the plurality of dispersion holes may have a slit shape that crosses the dispersion plate in the second direction.

[0026] In an embodiment, the chamber may include: a first chamber, in which a drying gas for spraying onto a first surface of an electrode plate flows; and a second chamber, in which a drying gas for spraying onto a second surface of the electrode plate flows, and the plurality of gas nozzles may be installed in at least one of the first chamber and the second chamber.

[0027] According to an embodiment of the present disclosure, an electrode plate drying device may include: a chamber, a gas supply space for forming a flow of a drying gas for drying an electrode plate, and a plurality of gas nozzles in fluid communication with the gas supply space of the chamber. Each of the plurality of gas nozzles may include: a nozzle body having a first plate and a second plate spaced apart from the first plate in a first direction; at least one inflow hole formed in the first plate and configured to allow a drying gas to flow from the gas supply space into a flow space of the nozzle body; a plurality of injection holes formed in the second plate and configured to inject the drying gas inside the flow space to the outside of the nozzle body; and a guide plate disposed between the first plate and the second plate and configured to convert the flow direction of the drying gas entering the flow space through the at least one inflow hole before the drying gas is injected to the outside through the plurality of injection holes.

[0028] (III) Beneficial effects

[0029] According to the embodiments of the present disclosure, a flow rate and / or flow velocity deviation according to the position of the electrode plate may be reduced.

[0030] According to the embodiments of the present disclosure, drying efficiency and drying quality deviation according to the position of the electrode plate may be reduced.

[0031] According to the embodiments of the present disclosure, even if the electrode plate is wide, defects such as cracks and warping on both sides of the electrode plate can be reduced, and the quality of the electrode plate can be improved even if the electrode plate is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view showing an electrode plate drying device according to an embodiment of the present disclosure.

[0033] Figure 2 is a perspective view showing a gas nozzle for drying an electrode plate according to an embodiment of the present disclosure.

[0034] Figure 3a4 is a partially cutaway perspective view of a gas nozzle for drying an electrode plate according to an embodiment of the present disclosure.

[0035] Figure 3b is along Figure 1 The cross-sectional view taken along the line I-I' shows Figure 3a A cross section of a gas nozzle is shown.

[0036] Figure 4a is based on Figure 3a A partially cutaway perspective view of a gas nozzle for drying an electrode plate according to a modified embodiment.

[0037] Figure 4b is along Figure 1 The cross-sectional view taken along the line I-I' shows Figure 4a A cross section of a gas nozzle is shown.

[0038] Figure 5a is a perspective view showing an electrode plate drying device according to another embodiment of the present disclosure.

[0039] Figure 5b is along Figure 5a A partially cutaway perspective view taken along line II-II' shows a cross section of the dispersion plate and the gas nozzle.

[0040] Figure 5c is along Figure 5a The cross-sectional view taken along line II-II' shows Figure 5b A cross section of a gas nozzle is shown.

[0041] Figure 6a is a perspective view showing an electrode plate drying device according to yet another embodiment of the present disclosure.

[0042] Figure 6b is along Figure 6a A partially cutaway perspective view taken along line III-III' shows a cross section of the dispersion plate and the gas nozzle.

[0043] Figure 6c is along Figure 6a The cross-sectional view taken along line III-III' shows Figure 6b A cross section of a gas nozzle is shown.

[0044] Figure 7a is based on Figure 5b A partially cutaway perspective view of a gas nozzle for drying an electrode plate according to a modified embodiment.

[0045] Figure 7b is along Figure 5a The cross-sectional view taken along line II-II' shows Figure 7a A cross-sectional view of the gas nozzle is shown.

[0046] Figure 8a is a perspective view showing an electrode plate drying device according to a first comparative example.

[0047] Figure 8b is along Figure 8a The cross-sectional view taken along line IV-IV' of FIG. 1 shows a state in which a gas nozzle is provided in the electrode plate drying device according to the first comparative example.

[0048] Figure 8c yes Figure 8b A partially cutaway perspective view of a gas nozzle is shown.

[0049] Fig. 9 is along Figure 8a The cross-sectional view taken along line IV-IV' shows a state in which a gas nozzle is provided in the electrode plate drying device according to the second comparative example.

[0050] Fig.10a The figure shows the simulated drying gas flow through Figures 1 to 3b A diagram showing the results of the gas nozzle of the first embodiment is shown.

[0051] Fig.10b The figure shows the simulated drying gas flow through Figure 5a to Figure 5c A graph showing the results of the gas nozzle of the second embodiment is shown.

[0052] Fig.10c The figure shows the simulated drying gas flow through Figures 6a to 6c A graph showing the results of the gas nozzle of the third embodiment is shown.

[0053] Fig.11a The figure shows the simulated drying gas flow through Figures 8a to 8c A graph showing the results of the gas nozzle of the first comparative example is shown.

[0054] Fig.11b The figure shows the simulated drying gas flow through Fig. 9 A graph showing the results of the gas nozzle of the second comparative example is shown.

[0055] Fig.12a The figure shows the simulated drying gas flow through Figure 3a and Figure 3b Figure 2 shows the results of the gas nozzle.

[0056] Figure 12b The figure shows the simulated drying gas flow through Figure 4a and Figure 4b Figure 2 shows the results of the gas nozzle.

[0057] Fig.13a The figure shows the simulated drying gas flowing through the Figure 3a and Figure 3bFigure 2 shows the results of the gas nozzle.

[0058] Fig.13b The figure shows the simulated drying gas flowing through the Figure 4a and Figure 4b Result plot for the gas nozzle shown.

[0059] Description of reference numerals:

[0060] 100: Gas nozzle 110: Nozzle body

[0061] 111: First board 112: Second board

[0062] 120: Flow space 130: Inflow hole

[0063] 140: injection hole 150: guide plate

[0064] 200: Drying device 210: First chamber (chamber)

[0065] 220: Dispersion plate 221: Dispersion hole DETAILED DESCRIPTION

[0066] The same reference numerals or symbols recorded in the drawings attached to this specification represent parts or components that perform substantially the same functions. For ease of description and understanding, the same reference numerals or symbols will be used to describe different embodiments. That is, even if components with the same reference numerals are shown in multiple drawings, the multiple drawings do not represent the same embodiment.

[0067] In the following description, unless the context clearly indicates otherwise, singular expressions include plural expressions. It should be understood that terms such as "including" or "comprising" are intended to indicate the presence of features, numbers, steps, operations, components, parts or combinations thereof recorded in the specification, rather than excluding the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts or combinations thereof in advance.

[0068] In addition, in the following description, expressions such as upper side, upper part, lower side, lower part, side, front part, and rear part are expressed based on the directions shown in the figures. It should be noted that if the directions of the corresponding objects are changed, they can be expressed in different ways.

[0069] In addition, in this specification and claims, terms including ordinal numbers such as "first" and "second" may be used to distinguish components. These ordinal numbers are used to distinguish the same or similar components, and the meaning of the terms cannot be interpreted in a limiting manner due to the use of these ordinal numbers. For example, the order of use or the order of setting of the components combined with these ordinal numbers should not be interpreted in a limiting manner by these numbers. These ordinal numbers can be used interchangeably as needed.

[0070] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, this is merely exemplary, and the present disclosure is not limited to the specific embodiments exemplarily described.

[0071] Figure 1 is a perspective view showing an electrode plate drying device 200 according to an embodiment of the present disclosure.

[0072] Reference Figure 1 The electrode plate drying device 200 may include a chamber where a drying gas flows and a plurality of gas nozzles coupled to the chamber. The chamber may include a first chamber 210 and a second chamber 230, and the gas nozzles may include a first nozzle 100 and a second nozzle 240.

[0073] The electrode plate ES may include a positive plate and a negative plate. The electrode plate ES may include a sheet-shaped or film-shaped collector, and a positive active material or a negative active material coated on the collector. For example, the negative plate may be formed by coating the negative active material on a copper sheet, and the positive plate may be formed by coating the positive active material on an aluminum sheet. The electrode plate ES may be manufactured by a coating process for coating the active material and a drying process for drying the active material. The electrode plate drying device 200 according to an embodiment of the present disclosure may be applied to the drying process of the electrode plate ES. The electrode plate drying device 200 according to the embodiment may be applied to the drying process of the negative plate, but may also be applied to the drying process of the positive plate.

[0074] A gas supply space for drying the electrode plate ES may be formed inside the chamber. The gas supply space may include a first gas supply space 215 formed inside the first chamber 210 and a second gas supply space 235 formed inside the second chamber 230 .

[0075] The drying gas may include hot air having a predetermined temperature. The temperature, composition and physical properties of the drying gas may be variously changed. The first chamber 210 and the second chamber 230 may be respectively disposed on two opposite surfaces of the electrode plate ES as a drying object. For example, the first chamber 210 may be configured so that the drying gas sprayed onto the first surface of the electrode plate ES flows in the first chamber 210, and the second chamber 230 may be configured so that the drying gas sprayed onto the second surface of the electrode plate ES flows in the second chamber 230. The first surface and the second surface of the electrode plate ES may be the upper surface (e.g., the top surface) and the lower surface (e.g., the bottom surface) of the electrode plate ES, respectively. The first chamber 210 and the second chamber 230 may be disposed at a predetermined interval, and the electrode plate ES may be disposed and / or moved along the transfer direction SS between the first chamber 210 and the second chamber 230. The transfer direction SS of the electrode plate ES may be a third direction X.

[0076] The first chamber 210 and the second chamber 230 may respectively include an inlet for supplying a drying gas from outside the chamber to the gas supply space. For example, the first chamber 210 may include a first inlet 211 for supplying a drying gas from outside the first chamber 210 to the first gas supply space 215, and the second chamber 230 may include a second inlet 231 for supplying a drying gas from outside the second chamber 230 to the second gas supply space 235. The first inlet 211 and the second inlet 231 are respectively disposed on one side of the first chamber 210 and the second chamber 230 to supply the drying gas along the length direction (or the second direction Y) of the gas nozzle. The supply direction of the drying gas may be a direction perpendicular to the moving direction SS of the electrode plate ES, i.e., the width direction of the electrode plate ES.

[0077] The first chamber 210 and the second chamber 230 may be disposed inside the main chamber 250. The main chamber 250 may include an exhaust port for discharging the drying gas sprayed onto the electrode plate ES through the gas nozzle to the outside of the main chamber 250. The exhaust port may include a first exhaust port 251 disposed on the side of the first chamber 210 and a second exhaust port 252 disposed on the side of the second chamber 230. Guide vanes may be disposed in the first exhaust port 251 and the second exhaust port 252 to guide and stabilize the gas flow. For example, the guide vanes installed in the first exhaust port 251 and the second exhaust port 252 may have a shape such as Figure 8a The guide vanes 22 shown are also divided into a plurality of regions.

[0078] A plurality of gas nozzles may be coupled to the first chamber 210 and / or the second chamber 230 to communicate with the first gas supply space 215 of the first chamber 210 and / or the second gas supply space 235 of the second chamber 230. The gas nozzle may include a plurality of first nozzles 100 disposed in the first chamber 210 and a plurality of second nozzles 240 disposed in the second chamber 230. The first nozzle 100 and the second nozzle 240 may have the same number and may be disposed in pairs at positions corresponding to each other to spray the drying gas from the upper and lower sides of the electrode plate ES, and may have the same number. However, the arrangement positions and numbers of the first nozzle 100 and the second nozzle 240 are not limited thereto.

[0079] The first nozzle 100 may be installed on a substrate 212 of the first chamber 210. The substrate 212 may be configured as a surface facing the electrode plate ES in the first chamber 210. The second nozzle 240 may also be installed on a surface facing the electrode plate ES in the second chamber 230.

[0080] The first nozzle 100 and the second nozzle 240 may each have a shape extending in the width direction Y of the electrode plate ES, i.e., in a direction perpendicular to the transfer direction SS (i.e., the third direction) of the electrode plate ES. That is, the length direction Y of the first nozzle 100 and the second nozzle 240 may be the width direction of the electrode plate ES. A plurality of first nozzles 100 may be spaced apart in the third direction X, i.e., the transfer direction SS of the electrode plate ES. A plurality of second nozzles 240 may be spaced apart in the third direction X, i.e., the transfer direction SS of the electrode plate ES.

[0081] When the width of the electrode plate ES is wide, that is, when the electrode plate is wide, the length of the first nozzle 100 and the second nozzle 240 will also become longer. When the length of the first nozzle 100 and the second nozzle 240 becomes longer, the flow rate and / or flow rate deviation between the central part and the two side parts in the length direction of the nozzle (the second direction Y), or the flow rate and / or flow rate deviation between the two side parts may increase. In this case, according to the Y position in the width direction of the electrode plate ES, the drying deviation will increase and the quality of the electrode plate ES will decrease. The electrode plate drying device 200 of the present disclosure can reduce the flow rate and / or flow rate deviation by improving the gas nozzle, and can improve the quality of the electrode plate ES not only when the width WS of the electrode plate ES is narrow, but also when the width WS of the electrode plate ES is wide. The electrode plate drying device 200 of the present disclosure can be applied to the electrode plate ES with a width WS of 700 mm or more, 1000 mm or more, 1200 mm or more, or 1500 mm or more. However, the width WS of the electrode plate ES applied to the electrode plate drying device 200 of the present disclosure can also have a value of 700 mm or less.

[0082] The first inlet 211 and the second inlet 231 may be configured to supply the drying gas along the second direction Y, i.e., the length direction of the gas nozzle. The drying gas may flow and disperse in the first gas supply space 215 and the second gas supply space 235 after flowing into the first chamber 210 and the second chamber 230 along the second direction Y, and then flow into the gas nozzle and be ejected along the first direction Z. That is, the first direction Z, i.e., the ejection direction of the drying gas ejected through the gas nozzle 100, may be different from the second direction Y in which the drying gas flows into the first chamber 210 and the second chamber 230. According to an embodiment of the present disclosure, the influence of the pressure and / or flow rate of the gas flowing into the first chamber 210 and the second chamber 230 on the flow rate and / or flow rate of the gas ejected through the gas nozzle 100 may be reduced. That is, since the drying gas is ejected through the gas nozzle 100 after the direction is changed, the flow rate and / or flow rate deviation according to the width direction Y position of the electrode plate ES may be reduced.

[0083] The first nozzle 100 and the second nozzle 240 may have different configurations. The first nozzle 100 and the second nozzle 240 may have the same configuration. For example, the first nozzle 100 may have a shape including a circular perforated hole (a spray hole 140 described later), and the second nozzle 240 may have a shape including a Coanda nozzle, i.e., a nozzle having a shape that takes advantage of the Coanda effect. Different from this, both the first nozzle 100 and the second nozzle 240 may have a shape including a circular perforated hole.

[0084] The plurality of gas nozzles of the present disclosure may be installed in at least one of the first chamber 210 and the second chamber 230. However, in the following disclosure, for the sake of convenience, only the case where the gas nozzle is the first nozzle 100 installed in the first chamber 210 is described, but the gas nozzle of the present disclosure may also be applicable to the second nozzle 240 installed in the second chamber 230. For the sake of convenience, the reference numeral "100" of the first nozzle 100 is used for the gas nozzle.

[0085] Figure 2 is a perspective view showing a gas nozzle 100 for drying an electrode plate according to an embodiment of the present disclosure, Figure 3a is a partially cutaway perspective view of a gas nozzle 100 for drying an electrode plate according to an embodiment of the present disclosure, Figure 3b is along Figure 1 The cross-sectional view taken along the line I-I' shows Figure 3a A cross section of a gas nozzle 100 is shown.

[0086] and Figure 1 Refer to Figure 2 , Figure 3a and Figure 3b The gas nozzle 100 according to the embodiment may be coupled to a chamber (e.g., a first chamber 210) that supplies a drying gas for drying the electrode plate ES. In the following description, the chamber is described by taking the first chamber 210 as an example. However, when the gas nozzle 100 according to the embodiment is applied to a second nozzle, the "chamber" may refer to the second chamber 230.

[0087] The gas nozzle 100 according to the embodiment may include a nozzle body 110. The nozzle body 110 may form a flow space 120 in which a drying gas flowing in from the outside of the nozzle body 110 flows.

[0088] The nozzle body 110 may include a first plate 111 and a second plate 112. The nozzle body 110 may include a plurality of side plates 113 connecting an edge of the first plate 111 and a corresponding edge of the second plate 112. The nozzle body 110 may have a shape formed by the first plate 111, the second plate 112, and the plurality of side plates 113.

[0089] As an example, the nozzle body 110 may have a rectangular parallelepiped shape having a height "H" in the first direction Z, a length "W" in the second direction Y, and a width "L" in the third direction X. When the nozzle body 110 has a rectangular parallelepiped shape, the first plate 111 and the second plate 112 may form an upper surface (or top surface) and a lower surface (or bottom surface) of the nozzle body 110, and the four side plates 113 may form the sides of the nozzle body 110. The width L of the nozzle body 110 may correspond to the transfer direction SS of the electrode plate ES, and the length W of the nozzle body 110 may correspond to the width direction Y of the electrode plate ES.

[0090] The first plate 111 may have a flat plate shape. The first plate 111 may have a quadrangular plate shape. The second plate 112 may be disposed spaced apart from the first plate 111 in the first direction Z. The second plate 112 may have a flat plate shape. The second plate 112 may have a quadrangular plate shape.

[0091] The side plate 113 may connect an edge of the first plate 111 and an edge of the second plate 112. The side plate 113 may extend from the edge of the first plate 111 in the first direction Z. An end of the first plate 111 and an end of the second plate 112 may be connected by a plurality of side plates 113. When the first plate 111 and the second plate 112 have a quadrilateral plate shape, the first plate 111 and the second plate 112 may be connected by four side plates 113.

[0092] A flow space 120 in which the drying gas flowing from the first chamber 210 flows may be formed between the first plate 111 and the second plate 112. The flow space 120 may be surrounded by the first plate 111, the second plate 112, and the plurality of side plates 113.

[0093] The nozzle body 110 may be coupled to a chamber (e.g., the first chamber 210). The nozzle body 110 may be coupled to an opening 213 formed in the substrate 212 from the outside of the chamber. The first plate 111 may form the same plane as the substrate 212. That is, the first plate 111 and the substrate 212 may be disposed at the same height. However, the arrangement position of the first plate 111 is not limited thereto, and an arrangement mode in which the first plate 111 protrudes to the inside of the first gas supply space 215 of the first chamber 210 may also be adopted.

[0094] The nozzle body 110 may include at least one inflow hole 130 formed in the first plate 111 and a plurality of spray holes 140 formed in the second plate 112 .

[0095] At least one inflow hole 130 formed in the first plate 111 may be configured to allow drying gas to flow from outside the nozzle body 110 into the flow space 120. The at least one inflow hole 130 may have a slit shape that crosses the first plate 111 along the second direction Y, i.e., the length direction of the nozzle body 110. Figure 2 , Figure 3a and Figure 3b A configuration in which one inflow hole 130 is provided in the first plate 111 is shown, but the number of inflow holes 130 provided in the first plate 111 is not limited thereto. For example, two or more inflow holes 130 may be provided in the first plate 111.

[0096] The plurality of injection holes 140 formed in the second plate 112 may be configured to inject the drying gas in the flow space 120 to the outside. The plurality of injection holes 140 may be formed by a plurality of perforated holes punched in the second plate 112. The plurality of injection holes 140 may have a circular shape, but is not limited thereto. The shape of the plurality of injection holes 140 may be changed in various ways and may have, for example, an elliptical shape, an angular shape. The number and arrangement form of the plurality of injection holes 140 are not limited to Figure 3a As shown, various changes can be made.

[0097] The total cross-sectional area of ​​the plurality of injection holes 140 may have a value greater than the total cross-sectional area of ​​the at least one inflow hole 130. Therefore, the drying gas may be injected onto the electrode plate ES with a reduced flow rate while passing through the injection holes 140 to dry the electrode plate ES.

[0098] As described above, according to an embodiment of the present disclosure, the drying gas passes through at least one inflow hole 130 including a slit-shaped hole, and the drying gas flowing into the flow space 120 through the slit-shaped inflow hole 130 can be dispersed and uniform (become more uniform or homogenized) in the flow space 120 and then sprayed through the spray hole 140. Therefore, the drying gas can be sprayed to the electrode plate ES in a state where the flow rate and / or flow velocity deviation in the length direction Y of the gas nozzle 100, that is, the width direction of the electrode plate ES is small. According to the embodiment, even if the electrode plate ES is wide, defects such as cracks and warping on both sides of the electrode plate ES can be reduced, and even if the electrode plate ES is wide, the quality of the electrode plate ES can be improved.

[0099] Figure 4a is based on Figure 3a A partially cutaway perspective view of a gas nozzle 100 for drying an electrode plate according to a modified embodiment. Figure 4bis along Figure 1 The cross-sectional view taken along the line I-I' shows Figure 4a A cross section of a gas nozzle 100 is shown.

[0100] and Figure 3a and Figure 3b Like the gas nozzle 100 shown, Figure 4a and Figure 4b The illustrated gas nozzle 100 may include a nozzle body 110 including a first plate 111 and a second plate 112 , and may include at least one slit-shaped inflow hole 130 formed in the first plate 111 and a plurality of injection holes 140 formed in the second plate 112 . Figure 4a and Figure 4b The gas nozzle 100 is shown with Figure 3a and Figure 3b The difference between the gas nozzle 100 shown in FIG. 1 and FIG. 2 is that the gas nozzle 100 further includes a deflector 150. Therefore, the description will focus on the gas nozzle 100 and the deflector 150. Figure 3a and Figure 3b The illustrated gas nozzles 100 have aspects of different configurations.

[0101] The guide plate 150 may be disposed between the first plate 111 and the second plate 112 to convert the flow direction of the drying gas flowing in through the at least one inflow hole 130. That is, the guide plate 150 may hinder the drying gas passing through the inflow hole 130 from flowing in the first direction Z, and thus may restrict the drying gas passing through the inflow hole 130 from being directly sprayed through the spray hole 140.

[0102] The guide plate 150 may have a shape that crosses between the first plate 111 and the second plate 112 along the second direction Y, i.e., the width direction of the electrode plate. The first plate 111 and the guide plate 150 may be spaced apart in the first direction Z. The guide plate 150 and the second plate 112 may be spaced apart in the first direction Z. The first plate 111 and the guide plate 150 may be spaced apart by a first height H1. The guide plate 150 and the second plate 112 may be spaced apart by a second height H2.

[0103] The guide plate 150 may be disposed at a position facing the at least one inflow hole 130 along the first direction Z (with the first direction Z as a reference). That is, the at least one inflow hole 130 and the guide plate 150 may be disposed at positions corresponding to each other in the third direction X. Therefore, the drying gas passing through the at least one inflow hole 130 hits the guide plate 150 and changes direction, and may flow to both sides of the guide plate 150. The drying gas disperses and flows to both sides of the guide plate 150, then moves to the lower side of the guide plate 150 and passes through the injection hole 140.

[0104] The guide plate 150 may be placed closer to the first plate 111 as shown in FIG. 4B . That is, the value of the first height H1 between the guide plate 150 and the first plate 111 may be smaller than the second height H2 between the guide plate 150 and the second plate 112 . When the first height H1 is greater than the second height H2, the distance between the at least one inflow hole 130 and the guide plate 150 increases, which may reduce the effect of the drying gas hitting the guide plate 150 and changing direction to disperse. However, the embodiments of the present disclosure do not exclude the case where the first height H1 is equal to the second height H2 or the case where the first height H1 is greater than the second height H2, however, in those cases, the improvement in making the flow rate and flow velocity of the drying gas more uniform may be reduced compared to the case where the first height H1 is less than the second height H2 as shown in FIG. 4A . In some embodiments, the first height may be 1 / 2 of the second height or less.

[0105] The value of the width L1 of the guide plate 150 may be greater than 10% and less than 90% of the width L of the first plate 111. For example, the value of the width L1 of the guide plate 150 may be greater than 10%, greater than 20%, greater than 30%, greater than 40%, or greater than 50% of the width L of the first plate 111. In addition, the value of the width L1 of the guide plate 150 may be less than 90%, less than 80%, less than 70%, less than 60%, or less than 50% of the width L of the first plate 111. When the width L1 of the guide plate 150 is less than 10% of the width L of the first plate 111, the effect of converting the flow direction of the drying gas passing through the guide plate 150 is reduced. On the contrary, when the width L1 of the guide plate 150 exceeds 90% of the width L of the first plate 111, after the drying gas hits the guide plate 150, the drying gas flows over a long distance in the space between the guide plate 150 and the first plate 111. The flow resistance is therefore increased, which may reduce the effect of the flow direction change.

[0106] As described above, according to an embodiment of the present disclosure, the drying gas hits the guide plate 150 and changes direction before moving to the lower side of the guide plate 150 , so the drying gas can flow in the flow space 120 or be sprayed through the spray hole 140 after the flow rate is fully dispersed and / or uniform.

[0107] Figure 5a is a perspective view showing an electrode plate drying device 200 according to another embodiment of the present disclosure. Figure 5b is along Figure 5a The partially cutaway perspective view taken along line II-II′ shows a cross section of the dispersion plate 220 and the gas nozzle 100 . Figure 5c is along Figure 5a The cross-sectional view taken along line II-II' shows Figure 5b A cross section of a gas nozzle 100 is shown.

[0108] Figure 5a The electrode plate drying device 200 shown in FIG. Figure 1 The electrode plate drying device 200 shown is different in that a dispersion plate 220 and the number of at least one inflow hole 130 are provided in the chamber 210. Therefore, description of the same or similar configurations will be omitted, and only configurations with differences will be described.

[0109] Reference Figure 5a to Figure 5c The dispersion plate 220 may be disposed in a gas supply space 215 formed inside a chamber, such as the first chamber 210. The dispersion plate 220 may be disposed between the inlet 211 and the first plate 111 at a position spaced apart from the first plate 111 along the first direction Z. The dispersion plate 220 may be disposed parallel to the first plate 111.

[0110] The dispersion plate 220 may include a plurality of dispersion holes 221 configured to allow the drying gas to communicate between the inlet 211 of the chamber 210 and at least one inlet hole 130 formed in the first plate 111. Therefore, the drying gas flowing into the gas supply space 215 through the inlet 211 may flow toward the plurality of inlet holes 130 after being dispersed by the plurality of dispersion holes 221.

[0111] The inlet 211 may be configured to supply the drying gas along the second direction Y, i.e., the width direction of the electrode plate ES, and the plurality of dispersion holes 221 may each have a slit shape that crosses the dispersion plate 220 along the third direction X, i.e., the moving direction SS of the electrode plate ES. That is, the flow direction of the drying gas through the inlet 211 and the direction in which the dispersion holes 221 extend may intersect each other.

[0112] like Figure 5b and Figure 5c As shown, a plurality of inflow holes 130 may be formed in the first plate 111. Each of the inflow holes 130 may have a slit shape that crosses the first plate 111 in the second direction.

[0113] The plurality of injection holes 140 formed in the second plate 112 may be circular perforations. Figure 3a and Figure 3b The configuration of the spray holes 140 shown is the same, so a detailed description will be omitted.

[0114] As described above, according to the embodiment of the present disclosure, the drying gas flowing into the gas supply space 215 through the inlet 211 may flow into the gas nozzle 100 after being dispersed and uniformed while passing through the dispersion holes 221 of the dispersion plate 220. In addition, the drying gas flowing into the flow space 120 through the slit-shaped inflow hole 130 may be sprayed through the spray hole 140 after being dispersed and uniformed in the flow space 120.

[0115] Figure 6a is a perspective view showing an electrode plate drying device 200 according to yet another embodiment of the present disclosure. Figure 6b is along Figure 6a The partially cutaway perspective view taken along line III-III′ shows a cross section of the dispersion plate 220 and the gas nozzle 100 . Figure 6c is along Figure 6a The cross-sectional view taken along line III-III' shows Figure 6b A cross section of a gas nozzle 100 is shown.

[0116] Figures 6a to 6c The electrode plate drying device 200 shown in FIG. Figure 5a to Figure 5c The electrode plate drying device 200 shown is different from the electrode plate drying device 200 in that the dispersion holes 221 formed in the dispersion plate 220 extend in a different direction.

[0117] like Figures 6a to 6c As shown, the plurality of dispersion holes 221 may have a slit shape that crosses the dispersion plate 220 along the second direction Y, ie, the width direction of the electrode plate ES. As described above, the dispersion holes 221 may extend in the same direction as the flow direction of the drying gas through the inlet 211 .

[0118] Figure 7a is based on Figure 5b A partially cutaway perspective view of a gas nozzle 100 for drying an electrode plate according to a modified embodiment. Figure 7b is along Figure 5a The cross-sectional view taken along line II-II' shows Figure 7a A cross-sectional view of a gas nozzle 100 is shown.

[0119] Figure 7a and Figure 7b The gas nozzle 100 is shown with Figure 5b and Figure 5c The difference of the gas nozzle 100 shown is that it further includes a guide plate 150. That is, the guide plate 150 can also be applied to the embodiment including the dispersion plate 220.

[0120] The guide plate 150 may be provided between the first plate 111 and the second plate 112 to convert the flow direction of the drying gas flowing in through the at least one inflow hole 130. Therefore, the drying gas passing through the inflow hole 130 hits the guide plate 150 and converts the direction, and may flow to both sides of the guide plate 150. The drying gas may disperse and flow to both sides of the guide plate 150 and then move to the lower side of the guide plate 150 and pass through the injection hole 140.

[0121] The guide plate 150 can also be applied to Figure 6b and Figure 6c A gas nozzle 100 is shown.

[0122] As described above, according to the embodiment of the present disclosure, the drying gas flowing into the gas supply space 215 through the inlet 211 may flow into the gas nozzle 100 after being dispersed and uniformed while passing through the dispersion holes 221 of the dispersion plate 220. In addition, the drying gas flowing into the flow space 120 through the slit-shaped inflow hole 130 may hit the guide plate 150 and change direction before moving to the lower side of the guide plate 150. Therefore, the drying gas may be sprayed through the spray hole 140 after flowing in the flow space 120 or the flow velocity thereof is sufficiently dispersed and / or uniformed.

[0123] Figure 8a is a perspective view showing an electrode plate drying device 20 according to a first comparative example. Figure 8b is along Figure 8a 1 is a cross-sectional view taken along line IV-IV' of , showing a state in which a gas nozzle is provided in the electrode plate drying device 20 according to the first comparative example. Figure 8c yes Figure 8b A partially cutaway perspective view of a gas nozzle is shown.

[0124] Reference Figure 8a The electrode plate drying device 20 according to the first comparative example is compared with the electrode plate drying device according to Figure 1 The electrode plate drying device 200 of the illustrated embodiment differs in that it includes guide vanes 22 and in the configuration of the gas nozzle (or first nozzle 10). Detailed description of the same or similar configurations in the two drying devices will be omitted.

[0125] The electrode plate drying device 20 according to the first comparative example accommodates a first chamber 21 and a second chamber 23 inside a main chamber 25. The electrode plate ES to be dried may be disposed between the first chamber 21 and the second chamber 23.

[0126] The first chamber 21 has a first inlet 21a through which the drying gas flows in, and the drying gas flowing in through the first inlet 21a can be contained in the first gas supply space 21c. In the first chamber 21, a guide vane 22 can be installed in a portion adjacent to the first inlet 21a in the first gas supply space 21c. The guide vane 22 can have a shape divided into a plurality of regions so as to disperse the gas flowing in from the first inlet 21a.

[0127] The second chamber 23 has a second inlet 23a for the drying gas to flow in, and the drying gas flowing in through the second inlet 23a can be accommodated in the second gas supply space 23c. In the second chamber 23, guide vanes can be installed in a portion of the second gas supply space 23c adjacent to the second inlet 23a.

[0128] The gas nozzle may include a first nozzle 10 installed in the first chamber 21 and a second nozzle 24 installed in the second chamber 23. The first nozzle 10 may be coupled to the substrate 21b of the first chamber 21. The drying gas ejected from the gas nozzle may be exhausted to the outside of the main chamber 25 through the first exhaust port 25a and the second exhaust port 25b after drying the electrode plate ES. In the comparative example, the reference numeral "10" of the first nozzle 10 will be used for the gas nozzle.

[0129] Reference Figure 8b and Figure 8c , the gas nozzle 10 may include a nozzle body 11 coupled to a base plate 21 b of the first chamber 21. The guide vane 22 may be installed in the first gas supply space 21 c of the first chamber 21.

[0130] The nozzle body 11 may include a first plate 11a formed with at least one inflow hole 13 and a second plate 11b formed with at least one injection hole 14. The inflow hole 13 may include a plurality of perforations punched in the first plate 11a. The injection hole 14 may include a plurality of perforations punched in the second plate 11b. The inflow hole 13 and the injection hole 14 may be formed as circular holes, respectively.

[0131] Fig. 9 is along Figure 8a The cross-sectional view taken along line IV-IV' of FIG. 1 shows a state in which the gas nozzle 10 is provided in the electrode plate drying device 20 according to the second comparative example.

[0132] and Figures 8a to 8c Compared with the first comparative example shown, Fig. 9 The electrode plate drying device 20 of the second comparative example shown shows a state in which the guide vane 22 is not provided in the first gas supply space 21 c of the first chamber 21 .

[0133] In accordance with Fig. 9 In the electrode plate drying device 20 of the second comparative example shown in FIG. Figures 8a to 8c The configuration in the first comparative example shown is the same, so detailed description is omitted.

[0134] The embodiments of the present disclosure are further described below in conjunction with specific experimental examples. The embodiments and comparative examples included in the experimental examples are only examples of the present disclosure and do not limit the scope of the attached claims. It is obvious to those skilled in the art that various changes and modifications can be made to the embodiments within the scope of the present disclosure and the technical concept, and these changes and modifications belong to the scope of the attached claims.

[0135] Fig.10a The figure shows the simulated drying gas flow through Figures 1 to 3b A graph showing the results of the gas nozzle 100 of the first embodiment is shown. Fig.10b The figure shows the simulated drying gas flow through Figure 5a to Figure 5c A graph showing the results of the gas nozzle 100 of the second embodiment is shown. Fig.10c The figure shows the simulated drying gas flow through Figures 6a to 6c A graph showing the results of the gas nozzle 100 of the third embodiment is shown.

[0136] Fig.11a The figure shows the simulated drying gas flow through Figures 8a to 8c The graph shown is a result of the gas nozzle 10 of the first comparative example. Fig.11b The figure shows the simulated drying gas flow through Fig. 9 The graph shown is a result of the gas nozzle 10 of the second comparative example.

[0137] Figures 10a to 10c , Fig.11a and Fig.11b The flow rate at 5 mm above the electrode plate surface when the drying gas is sprayed from the gas nozzles 100, 10 provided in the first chambers 210, 21 is shown. The area where the flow rate of the drying gas is measured can be divided into a first portion DS adjacent to the first inlet 211, 21a, a second portion CT located at the center of the electrode plate in the width direction Y, and a third portion OS away from the first inlet 211, 21a along the width direction Y of the electrode plate.

[0138] Fig.10a yes Figure 3a and Figure 3b The gas nozzle 100 is shown mounted on Figure 1 The simulation results of the first embodiment in the first chamber 210 of the electrode plate drying device 200 are shown. Fig.10b yes Figure 5b and Figure 5c The gas nozzle 100 is shown mounted on Figure 5a The simulation results of the second embodiment in the first chamber 210 of the electrode plate drying device 200 are shown. Fig.10c yes Figure 6b and Figure 6c The gas nozzle 100 is shown mounted on Figure 6a The simulation results of the third embodiment in the first chamber 210 of the electrode plate drying device 200 are shown.

[0139] Fig.11a yes Figure 8b and Figure 8c The gas nozzle 10 shown is mounted on Figure 8a The simulation results of the first comparative example in the first chamber 21 of the electrode plate drying device 20 are shown. Fig.11b yes Figure 8a The electrode plate drying device 20 shown in the figure is installed in a state where the guide blades 22 are not provided in the second chamber 21. Fig. 9 The simulation results of the second comparative example of the gas nozzle 10 are shown. The gas nozzles 10 of the first comparative example and the second comparative example have the same configuration, and the only difference is whether the guide vanes 22 are installed.

[0140] Figures 10a to 10c Examples and Fig.11a and Fig.11b Comparative Example The experiment was performed under the same conditions except for the structure of the gas nozzle.

[0141] exist Figures 10a to 10c Examples and Fig.11a and Fig.11b In the comparative example, the cross-sectional area of ​​the first inlet 211, 21a provided in the first chamber 210, 21 is 321000mm 2 (square millimeters), air volume is 119CMM (cubic meters per minute). The simulation is carried out under normal temperature conditions. Figures 10a to 10c Examples and Fig.11a and Fig.11b In the comparative example, the width WS of the electrode plate is about 1500 mm, and ten gas nozzles 100 , 10 are provided in the first chambers 210 , 21 .

[0142] exist Fig.10b The second embodiment and Fig.10c In the third embodiment, the slit width of the dispersion hole 221 of the dispersion plate 220 is 4 mm, and the total cross-sectional area of ​​the dispersion hole 221 is 132000 mm 2 (square millimeters).

[0143] In the gas nozzle 100 of the first embodiment, the inflow hole 130 includes a slit-shaped hole. The slit width of the inflow hole 130 is 4 mm, and the total cross-sectional area of ​​the inflow hole 130 is about 5950 mm. 2 The diameter of each injection hole 140 is 10 mm, and the total cross-sectional area of ​​the plurality of injection holes 140 is 53780 mm 2 (square millimeters).

[0144] In the gas nozzle 100 of the second and third embodiments, the inflow hole 130 includes two slit-shaped holes, the slit width of each inflow hole 130 is 4 mm, and the total cross-sectional area of ​​the inflow holes 130 is about 11900 mm. 2 The diameter of each injection hole 140 is 10 mm, and the total cross-sectional area of ​​the plurality of injection holes 140 is 53780 mm 2 (square millimeters).

[0145] exist Fig.11a The first comparative example and Fig.11bIn the second comparative example, the same gas nozzle 10 is provided. In each gas nozzle 10, the diameter of each inflow hole 13 is 8 mm, and the total cross-sectional area of ​​the plurality of inflow holes 13 is 36850 mm 2 (square millimeters), the diameter of each injection hole 14 is 10 mm, and the total cross-sectional area of ​​the plurality of injection holes 14 is 53780 mm 2 (square millimeters).

[0146] exist Fig.11a and 11b In the case of the first comparative example and the second comparative example shown, as a whole, the flow velocity of the second portion CT located at the center of the electrode plate in the width direction Y is low, while the flow velocity of the first portion DS and the third portion OS located on both sides of the electrode plate in the width direction Y is high. That is, in the case of the first comparative example and the second comparative example, the velocity deviation between the two side portions DS and OS in the width direction of the electrode plate and the center portion CT in the width direction is large.

[0147] In contrast, Figures 10a to 10c In the case of the first to third embodiments shown, it can be seen that the speed deviation between the second portion CT located at the center of the electrode plate in the width direction Y and the first portion DS and the third portion OS located on both sides of the width direction Y is reduced. In addition, it can be seen that the speed deviation between the first portion DS and the third portion OS located on both sides of the electrode plate in the width direction is reduced.

[0148] That is, it can be seen that the speed deviations of the widthwise both side portions DS, OS and the widthwise center portion CT of the electrode plate are reduced in the first to third embodiments compared with the first and second comparative examples.

[0149] The following Table 1 shows the average flow rate and deviation of the first to third embodiments, the first comparative example, and the second comparative example. Table 1 quantitatively shows the average flow rate in the width direction of the electrode plate at 5 mm above the surface of the electrode plate.

[0150] It can be seen from Table 1 that, compared with the first and second comparative examples, in the first to third embodiments, the flow velocity deviation in the width direction of the electrode plate is greatly reduced, and thus the flow rate deviation is also reduced.

[0151] [Table 1]

[0152]

[0153] As described above, according to the embodiments of the present disclosure, the drying gas can be sprayed onto the electrode plate in a state where the flow rate and / or flow velocity deviation in the width direction of the electrode plate is small. Therefore, even for a wide electrode plate, defects such as cracks and warping on both sides of the electrode plate can be reduced, and the quality of the electrode plate can be improved even for a wide electrode plate.

[0154] Fig.12a The figure shows the simulated drying gas flow through Figure 3a and Figure 3b A graph of the results for the gas nozzle 100 is shown. Figure 12b The figure shows the simulated drying gas flow through Figure 4a and Figure 4b A graph of the results for the gas nozzle 100 is shown.

[0155] Fig.13a The figure shows the simulated drying gas flowing through the Figure 3a and Figure 3b A graph of the results for the gas nozzle 100 is shown. Fig.13b The figure shows the simulated drying gas flowing through the Figure 4a and Figure 4b The resulting graph of the gas nozzle 100 is shown.

[0156] Fig.12a and Fig.13a is a flow simulation result of the drying gas in the embodiment without the guide plate 150, Figure 12b and Fig.13b 1 is a flow simulation result of the drying gas according to the embodiment including the guide plate 150 .

[0157] It can be seen that Figure 12b and Fig.13b As in the embodiment shown, if the guide plate 150 is included, the drying gas passing through the inflow hole 130 does not flow directly to the injection hole 140, but moves in the horizontal direction and the flow velocity is reduced, and the uniformity of the flow is increased. In particular, it can be seen that if the guide plate 150 is added, the flow deviation is improved by about 30% and the maximum velocity is reduced by more than about 70% compared to the case where the guide plate 150 is not included.

[0158] The above-mentioned embodiments are merely examples of the principles of the present disclosure. Without departing from the scope of the present invention, other configurations may also be included in the embodiments. In addition, the present disclosure may be implemented by deleting some components in the above-mentioned embodiments, or by combining the embodiments with each other. In addition, the embodiments may be combined to form other embodiments.

Claims

1. A gas nozzle for drying an electrode plate, comprising: a nozzle body having a flow space in which a drying gas flows, the flow space being formed between a first plate and a second plate spaced apart from the first plate in a first direction; at least one inflow hole formed in the first plate and configured to allow a drying gas to flow into the flow space from outside the nozzle body; as well as a plurality of injection holes formed in the second plate and injecting the drying gas from the inside of the flow space to the outside, The at least one inflow hole has a slit shape that crosses the first plate in a second direction.

2. The gas nozzle for drying the electrode plate according to claim 1, further comprising: A guide plate is provided between the first plate and the second plate and is configured to convert a flow direction of the drying gas flowing in through the at least one inflow hole.

3. The gas nozzle for drying the electrode plate according to claim 2, wherein: The second direction is a longitudinal direction of the nozzle body, and the guide plate has a shape that crosses the nozzle body along the second direction and is provided at a position facing the at least one inflow hole with reference to the first direction.

4. The gas nozzle for drying the electrode plate according to claim 2, wherein: A first height between the guide plate and the first plate has a value equal to or smaller than a second height between the guide plate and the second plate.

5. The gas nozzle for drying the electrode plate according to claim 2, wherein: A first height between the guide plate and the first plate has a value that is 1 / 2 or less of a second height between the guide plate and the second plate.

6. The gas nozzle for drying the electrode plate according to claim 3, wherein: The width of the guide plate is greater than or equal to 10% and less than or equal to 90% of the width of the first plate.

7. The gas nozzle for drying the electrode plate according to claim 1, wherein: The plurality of injection holes have a circular shape.

8. An electrode plate drying device, comprising: a chamber forming a gas supply space for flowing a drying gas for drying the electrode plate; as well as a plurality of gas nozzles coupled to the chamber so as to communicate with the gas supply space of the chamber, The plurality of gas nozzles comprises: a nozzle body, wherein a flow space for a drying gas to flow is formed between a first plate and a second plate spaced apart from the first plate in a first direction; at least one inflow hole formed in the first plate and configured to allow a drying gas to flow into the flow space from outside the nozzle body; and A plurality of injection holes are formed in the second plate and inject the drying gas in the flow space to the outside, The at least one inflow hole has a slit shape that crosses the first plate in a second direction.

9. The electrode plate drying device according to claim 8, wherein: The plurality of gas nozzles further include a guide plate disposed between the first plate and the second plate and configured to convert a flow direction of the drying gas flowing in through the at least one inflow hole.

10. The electrode plate drying device according to claim 8, wherein: The plurality of gas nozzles have a shape extending in the second direction, i.e., the width direction of the electrode plate, and are spaced apart in the third direction, i.e., the moving direction of the electrode plate. The first direction, the second direction and the third direction are perpendicular to each other.

11. The electrode plate drying device according to claim 10, wherein: The chamber comprises: an inlet for supplying a drying gas from outside the chamber to the gas supply space; and a dispersion plate disposed between the inlet and the first plate, The dispersion plate is configured to allow the drying gas to communicate between the inlet and the inflow hole.

12. The electrode plate drying device according to claim 11, wherein: The inlet is configured to supply drying gas along the second direction, The plurality of dispersion holes have a slit shape that crosses the dispersion plate along the third direction.

13. The electrode plate drying device according to claim 11, wherein: The inlet is configured to supply drying gas along the second direction, The plurality of dispersion holes have a slit shape that crosses the dispersion plate along the second direction.

14. The electrode plate drying device according to claim 8, wherein: The chamber comprises: a first chamber in which a drying gas for spraying onto a first surface of the electrode plate flows; and a second chamber in which a drying gas sprayed onto the second surface of the electrode plate flows; The plurality of gas nozzles are installed in at least one of the first chamber and the second chamber.

15. An electrode plate drying device, comprising: a chamber forming a gas supply space for flowing a drying gas for drying the electrode plate and a plurality of gas nozzles in fluid communication with the gas supply space of the chamber; Each of the plurality of gas nozzles comprises: a nozzle body having a first plate and a second plate spaced apart from the first plate in a first direction; at least one inflow hole formed in the first plate and configured to allow a drying gas to flow from the gas supply space into the flow space of the nozzle body; a plurality of injection holes formed in the second plate and configured to inject the drying gas inside the flow space to the outside of the nozzle body; and A guide plate is disposed between the first plate and the second plate and is configured to convert a flow direction of the drying gas entering the flow space through the at least one inflow hole before the drying gas is sprayed to the outside through the plurality of spray holes.

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