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 coupled to a chamber of an electrode plate drying apparatus including the chamber for supplying a drying gas for drying the electrode plate, the gas nozzle for drying the electrode plate including: a first nozzle body including at least one inflow opening, the inflow opening is configured to allow a drying gas to flow into the first nozzle main body; a second nozzle body connected to the first nozzle body and including a plurality of injection holes configured to inject a drying gas to the outside of the gas nozzle; and a partition plate disposed between the first nozzle body and the second nozzle body and including at least one communication hole configured to allow a drying gas to flow from the at least one inflow opening to the plurality of injection holes. At least a portion of the first nozzle body protrudes toward a gas supply space of the chamber to be disposed inside the chamber.

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 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 may be different 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 portion and the two side portions of the electrode plate is short along the width direction of the electrode plate, and therefore, the flow rate and / or flow velocity deviation between the center portion and the two side portions 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 portion and the two side portions may be large along 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 may be 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 may be provided.

[0010] According to the embodiments of the present disclosure, a gas nozzle for drying an electrode plate and an electrode plate drying device including the gas nozzle can be 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 is combined with the chamber of the electrode plate drying device including a chamber for supplying drying gas for drying the electrode plate, and the electrode plate drying gas nozzle may include: a first nozzle body, including at least one inlet opening, and the inlet opening is configured to allow drying gas to flow into the interior of the first nozzle body; a second nozzle body, connected to the first nozzle body, and including a plurality of injection holes, and the injection holes are configured to inject drying gas to the outside of the gas nozzle; and a partition plate, arranged between the first nozzle body and the second nozzle body, and including at least one connecting hole, and the connecting hole is configured to allow drying gas to flow from the at least one inlet opening to the plurality of injection holes, and at least a portion of the first nozzle body may protrude into the gas supply space of the chamber to be arranged inside the chamber.

[0014] In one embodiment, the second nozzle body may be disposed outside the chamber.

[0015] In one embodiment, the first nozzle body may include a first plate formed with the at least one inflow opening and first side walls extending from both ends of the first plate.

[0016] In one embodiment, the at least one inflow opening may have a slit shape extending across the first plate along a length direction of the first nozzle body.

[0017] In one embodiment, the at least one communication hole may have a slit shape that crosses the partition plate along a length direction of the partition plate.

[0018] In one embodiment, the first plate and the partition plate may be disposed spaced apart in a first direction, and the at least one communication hole may be disposed not to face the at least one inflow opening along the first direction.

[0019] In one embodiment, the number of the at least one communication hole may be greater than the number of the at least one inflow opening.

[0020] In one embodiment, the second nozzle body may include a second plate formed with the plurality of injection holes and a second sidewall extending from both ends of the second plate, and the first nozzle body may include a first sidewall connected to the second sidewall and a cover plate covering the first sidewall.

[0021] In one embodiment, the cover plate may include: a first portion, which is spaced apart from the upper end of the first side wall; and a second portion, which extends from both ends of the first portion, and the at least one inflow opening may be formed between the outer side surface of the first side wall and the second portion.

[0022] In one embodiment, the cover plate comprises an upside-down U-Shape cross section.

[0023] In one embodiment, a value of a second distance between an upper end of the first sidewall and the first portion may be 0.7 to 1.3 times of a first distance between an outer surface of the first sidewall and the second portion.

[0024] In one embodiment, the height of the second portion may be greater than 10% and less than 90% of the height of the first side wall.

[0025] In one embodiment, the total cross-sectional area of ​​the at least one communication hole may be greater than the total cross-sectional area of ​​the at least one inflow opening.

[0026] In one embodiment, the partition plate may partition a flow space formed between the first nozzle body and the second nozzle body into a first flow space opposite to the first nozzle body and a second flow space opposite to the second nozzle body.

[0027] In one embodiment, the second nozzle body may include a coupling portion coupled to the chamber by a fastening member, and the first nozzle body may have a shape protruding from the coupling portion toward a gas supply space of the chamber.

[0028] In one embodiment, the plurality of injection holes may have a circular cross-sectional shape.

[0029] According to the present disclosure, the electrode plate drying device may include: a chamber, which is formed with a gas supply space for the flow of drying gas for drying the electrode plate; and a plurality of gas nozzles, which are combined with the chamber to communicate with the gas supply space of the chamber, and the plurality of gas nozzles may include: a first nozzle body, including at least one inflow opening, and the inflow opening is configured to allow the drying gas in the gas supply space to flow into the interior of the first nozzle body; a second nozzle body, which is connected to the first nozzle body and includes a plurality of injection holes, and the injection holes are configured to inject the drying gas to the electrode plate; and a partition plate, which is arranged between the first nozzle body and the second nozzle body and includes at least one connecting hole, and the connecting hole is configured to allow the drying gas to flow from the at least one inflow opening to the plurality of injection holes, and at least a portion of the first nozzle body may have a shape protruding toward the gas supply space so as to be arranged inside the gas supply space of the chamber.

[0030] In one embodiment, the second nozzle body may include a coupling portion coupled to the chamber by a fastening member, and the first nozzle body may have a shape protruding from the coupling portion toward the gas supply space of the chamber.

[0031] In one embodiment, the chamber may include a drying gas supplied from outside the chamber to the gas supply space, and the inlet may be configured to supply the drying gas along a length direction of the gas nozzle.

[0032] In one 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 an electrode plate flows, and the plurality of gas nozzles may be installed in at least one of the first chamber and the second chamber.

[0033] (III) Beneficial effects

[0034] 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.

[0035] 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.

[0036] 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

[0037] Figure 1 is a perspective view showing an electrode plate drying device according to an embodiment of the present disclosure.

[0038] Figure 2a is a partially cutaway perspective view showing a gas nozzle for drying an electrode plate according to an embodiment of the present disclosure.

[0039] Figure 2b yes Figure 2a A cross-sectional view of the gas nozzle is shown.

[0040] Figure 2c It is shown Figure 2b A schematic diagram of the flow of drying gas in the gas nozzle is shown.

[0041] Figure 2d The figure shows the simulated drying gas flow through Figure 2c Figure 2 shows the results of the gas nozzle.

[0042] Figure 3a FIG. 4 is a partially cutaway perspective view showing a gas nozzle for drying an electrode plate according to another embodiment of the present disclosure.

[0043] Figure 3b yes Figure 3a A cross-sectional view of the gas nozzle is shown.

[0044] Figure 3c yes Figure 3b A schematic diagram of the flow of drying gas in the gas nozzle is shown.

[0045] Figure 3d The figure shows the simulated drying gas flow through Figure 3c Figure 2 shows the results of the gas nozzle.

[0046] Figure 4 is a perspective view showing an electrode plate drying device according to a comparative example.

[0047] Figure 5 1 is a partially cutaway perspective view showing a gas nozzle for drying an electrode plate according to a first comparative example.

[0048] Figure 6 is a cross-sectional view showing a gas nozzle for drying an electrode plate according to a second comparative example.

[0049] Figure 7a It shows the simulation according to Figure 5 The graph shows the results of the flow of the drying gas in the first comparative example.

[0050] Figure 7b It shows the simulation according to Figure 6 The graphs shown are results of the flow of the drying gas in the second comparative example.

[0051] Figure 7c It shows the simulation according to Figure 2a to Figure 2d FIG. 1 is a diagram showing the results of the flow of the drying gas according to the first embodiment.

[0052] Figure 7d It shows the simulation according to Figure 3a to Figure 3d FIG. 1 is a diagram showing the results of the flow of the drying gas according to the second embodiment.

[0053] Figure 8 Graphs comparing the difference in average speed according to the width direction position of the electrode plate between the example of the present disclosure and the comparative example.

[0054] Description of reference numerals:

[0055] 100, 100a, 100b: gas nozzle (first nozzle)

[0056] 110, 110a: first nozzle body 111: first plate

[0057] 112: first side wall 113: cover plate

[0058] 113a: Part 113b: Part 2

[0059] 115, 115a: Inflow opening 120: Second nozzle body

[0060] 121: second plate 122: second side wall

[0061] 123: Joint 125: Injection hole

[0062] 130: partition plate 135: connecting hole

[0063] 140: Flow space 150: Fastening parts

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

[0065] 215: First gas supply space (gas supply space) DETAILED DESCRIPTION

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] Figure 1 is a perspective view showing an electrode plate drying device 200 according to an embodiment of the present disclosure.

[0071] Reference Figure 1 The electrode plate drying device 200 according to an embodiment of the present disclosure 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. The gas nozzle may include a first nozzle 100 and a second nozzle 240.

[0072] 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 of coating the active material on the collector and then performing a drying process of 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.

[0073] The chamber may include a gas supply space through which a drying gas for drying the electrode plate ES flows. 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 .

[0074] 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 arranged on both sides 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 side 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 side of the electrode plate ES flows in the second chamber 230. The first side and the second side of the electrode plate ES may correspond to the opposite sides of the electrode plate ES, respectively. The first side and the second side of the electrode plate ES may correspond to the upper surface and the lower surface of the electrode plate ES, respectively. In an embodiment, the upper surface and the lower surface of the electrode plate ES may also refer to the top surface and the bottom surface of the electrode plate ES, respectively. The first chamber 210 and the second chamber 230 may be arranged to be separated by a predetermined interval, and the electrode plate ES may move along the transfer direction SS between the first chamber 210 and the second chamber 230. In an embodiment, the electrode plate ES may be located between the first chamber 210 and the second chamber 230 in the transfer direction SS. The transfer direction SS of the electrode plate ES may be the third direction X.

[0075] 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. 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. 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 100. The supply direction of the drying gas may be a direction perpendicular to the moving direction SS of the electrode plate ES, that is, the width direction of the electrode plate ES.

[0076] 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 100 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 4 The guide vanes 22 shown are also divided into a plurality of regions.

[0077] 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 at positions corresponding to each other to spray the drying gas from the upper and lower sides of the electrode plate ES. However, the arrangement positions and numbers of the first nozzle 100 and the second nozzle 240 are not limited thereto.

[0078] 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 be installed on a surface facing the electrode plate ES in the second chamber 230.

[0079] The first nozzle 100 and the second nozzle 240 may have a shape extending in the width direction 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 and 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.

[0080] When the width of the electrode plate ES is wide, the lengths of the first nozzle 100 and the second nozzle 240 also become longer. When the lengths of the first nozzle 100 and the second nozzle 240 become longer, the flow rate and / or flow rate deviation between the center 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, the drying deviation increases according to the width direction position of the electrode plate ES, and the quality of the electrode plate ES decreases. The electrode plate drying device 200 of the present disclosure reduces the flow rate and / or flow rate deviation by improving the gas nozzle 100, 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 electrode plates 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.

[0081] 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 100. 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 100 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. Therefore, 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.

[0082] 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 or substantially the same configuration. For example, the first nozzle 100 may have a shape including a circular perforated hole (a spray hole 125 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.

[0083] 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. Hereinafter, the reference numeral "100" of the first nozzle 100 is used for the gas nozzle.

[0084] Figure 2a 1 is a partially cutaway perspective view showing a gas nozzle 100 for drying an electrode plate ES according to an embodiment, Figure 2b yes Figure 2a A cross-sectional view of the gas nozzle 100 is shown, Figure 2c It is shown Figure 2b A schematic diagram of the flow of drying gas in the gas nozzle 100 is shown, Figure 2d The figure shows the simulated drying gas flow through Figure 2c A graph of the results for the gas nozzle 100 is shown. Figure 2d The flow rate of the drying gas in the cross section perpendicular to the second direction Y is shown.

[0085] and Figure 1 Refer to Figure 2a to Figure 2d The gas nozzle 100 or 100a 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.

[0086] The gas nozzle 100 according to the embodiment may include a first nozzle body 110, a second nozzle body 120, and a partition plate 130. In the embodiment, the partition plate 130 may form a boundary between the first nozzle body 110 and the second nozzle body 120.

[0087] The first nozzle body 110 may include at least one inflow opening 115 configured to allow a drying gas to flow into the first nozzle body 110. The first nozzle body 110 may include a first plate 111 formed with at least one inflow opening 115 and a first sidewall 112 extending from both ends of the first plate 111.

[0088] The first plate 111 may have a flat shape. The first plate 111 may have a quadrilateral plate shape. The at least one inflow opening 115 formed in the first plate 111 may have a slit shape. In an embodiment, the at least one inflow opening 115 formed in the first plate 111 may have a slit shape that crosses the first plate 111 along the length direction Y of the first nozzle body 110. Figure 2a to Figure 2d The configuration in which the first plate 111 includes only one inflow opening 115 is shown. However, the number of inflow openings 115 in the first plate 111 is not limited thereto. For example, the first plate 111 may include two or more inflow openings 115.

[0089] The first sidewall 112 may extend from both ends of the first plate 111 in the third direction X in the first direction Z. In addition, the first sidewall 112 may include portions extending from both ends of the first plate 111 in the second direction Y in the first direction Z. That is, the first sidewall 112 may extend from four edges of the first plate 111 toward the second nozzle body 120 in the first direction Z. The portions of the first sidewall 112 extending from both ends of the first plate 111 in the second direction Y may be replaced with the inner surface of a chamber (e.g., the first chamber 210).

[0090] The second nozzle body 120 is connected to the first nozzle body 110 and may include a plurality of spray holes 125 configured to spray the drying gas to the outside. The second nozzle body 120 may include a second plate 121 formed with the plurality of spray holes 125 and second sidewalls 122 extending from both ends of the second plate 121.

[0091] The second plate 121 may have a flat shape or a quadrilateral plate shape. The plurality of injection holes 125 formed in the second plate 121 may be formed by a plurality of perforated holes punched in the second plate 121. The plurality of injection holes 125 may each have a circular cross-sectional shape. However, the embodiments of the present disclosure are not limited thereto, and the injection holes 125 may have various other shapes such as an elliptical or angular shape. The number and arrangement form of the plurality of injection holes 125 are not limited to Figure 2a to Figure 2c As shown, various changes can be made.

[0092] The second sidewalls 122 may extend from both ends of the second plate 121 in the third direction X and both ends in the second direction Y in the first direction Z. That is, the second sidewalls 122 extend from four edges of the second plate 121 toward the first nozzle body 110 in the first direction Z to form a space containing drying gas.

[0093] In a state where the first plate 111 and the second plate 121 are coupled to each other, a flow space 140 through which the drying gas flowing in from the first chamber 210 flows may be formed between the first nozzle body 110 and the second nozzle body 120 .

[0094] The partition plate 130 may be disposed between the first nozzle body 110 and the second nozzle body 120. The first plate 111 and the partition plate 130 may be spaced apart in the first direction. Likewise, the partition plate 130 and the second plate 121 may be spaced apart in the first direction. The first plate 111 and the partition plate 130 may be spaced apart by a first height H1, and the partition plate 130 and the second plate 121 may be spaced apart by a second height H2.

[0095] The partition plate 130 may partition the flow space 140 formed between the first nozzle body 110 and the second nozzle body 120 into a first flow space 141 opposite to the first nozzle body 110 and a second flow space 142 opposite to the second nozzle body 120. That is, the partition plate 130 may restrict the flow of the drying gas in a space between the first flow space 141 and the second flow space 142 except for a communication hole 135 described later.

[0096] The partition plate 130 may include at least one communication hole 135 configured to allow the drying gas to flow from the at least one inflow opening 115 to the plurality of injection holes 125 . The drying gas of the first flow space 141 may move to the second flow space 142 through the communication hole 135 .

[0097] At least one communication hole 135 may have a slit shape that crosses the partition plate 130 along the length direction Y of the partition plate 130 .

[0098] At least one communication hole 135 may be disposed so as not to face at least one inflow opening 115 in the first direction Z. That is, at least one inflow opening 115 and at least one communication hole 135 may be disposed at different positions in the third direction X. Therefore, the drying gas after passing through the inflow opening 115 does not directly pass through the communication hole 135 in the first direction Z, but flows in a direction different from the first direction Z and then passes through the communication hole 135. Therefore, the flow of the drying gas through the communication hole 135 may be dispersed.

[0099] The number of at least one communication hole 135 may be greater than the number of at least one inflow opening 115. When the communication holes 135 and the inflow opening 115 respectively include slit-shaped holes having the same width, if the number of the communication holes 135 is greater than the number of the inflow openings 115, the total cross-sectional area of ​​the communication holes 135 may be increased. Figure 2dAs shown, the drying gas diffuses into the second flow space 142 in a state where the flow rate is lower than that in a process of passing through the inflow opening 115 while passing through the communication hole 135 , so that the flow or flow rate can become uniform.

[0100] In addition, regardless of the number or width of the communication holes 135 and the inflow opening 115, the value of the total cross-sectional area of ​​at least one communication hole 135 may be greater than the total cross-sectional area of ​​at least one inflow opening 115. In this case, Figure 2d As shown, the drying gas diffuses into the second flow space 142 in a state where the flow rate is lower than that in a process of passing through the inflow opening 115 while passing through the communication hole 135 , so that the flow or flow rate can become uniform.

[0101] The total cross-sectional area of ​​the plurality of injection holes 125 may be greater than the total cross-sectional area of ​​the at least one communication hole 135. Figure 2d As shown, the drying gas may be sprayed onto the electrode plate ES in a state where the flow rate is reduced when passing through the spray holes 125 to dry the electrode plate ES.

[0102] In addition, the total cross-sectional area of ​​at least one communication hole 135 may be greater than the total cross-sectional area of ​​at least one inflow opening 115, and the total cross-sectional area of ​​the plurality of injection holes 125 may be greater than the total cross-sectional area of ​​at least one communication hole 135. Therefore, the flow velocity of the drying gas decreases when passing through the communication hole 135 and the injection hole 125 in sequence, so that the flow can become uniform.

[0103] In addition, at least a portion of the first nozzle body 110 has a shape protruding toward the gas supply space (e.g., the first gas supply space 215) to be disposed inside the chamber (e.g., the first chamber 210). That is, at least a portion of the first nozzle body 110 may be inserted into the first gas supply space 215 through the opening 213 formed in the substrate 212.

[0104] The second nozzle body 120 may be disposed outside the first chamber 210 and may be coupled to the substrate 212 of the first chamber 210. The second nozzle body 120 may include a coupling portion 123 coupled to the first chamber 210 by a fastening member 150 such as a bolt. The coupling portion 123 may be formed on the second sidewall 122. As an example, the coupling portion 123 may be configured as a stepped structure formed on a portion of the second sidewall 122. The first nozzle body 110 may have a shape protruding from the coupling portion 123 toward the first gas supply space 215 of the first chamber 210.

[0105] The first nozzle body 110 and the second nozzle body 120 may be separated by the partition plate 130. As an example, when the partition plate 130 and the substrate 212 of the first chamber 210 are located on the same plane, the first nozzle body 110 is inserted into the first gas supply space 215, and the second nozzle body 120 may be disposed outside the first chamber 210. However, the partition plate 130 may be disposed at a position higher or lower than the substrate 212.

[0106] The total height H of the gas nozzle 100 may include a first height H1 of the first flow space 141 and a second height H2 of the second flow space 142. When the total height H of the gas nozzle 100 increases, the total volume of the flow space 140 also increases, and thus, the flow and flow rate of the drying gas inside the flow space 140 may become more uniform. According to an embodiment, at least a portion of the first nozzle body 110 is inserted into the first gas supply space 215 of the first chamber 210, and thus the total height H of the gas nozzle 100 may be increased while reducing the height of the gas nozzle 100 exposed to the outside of the first chamber 210. Therefore, according to an embodiment, the height of the gas nozzle 100 exposed to the outside of the first chamber 210 may be reduced while making the flow and / or flow rate of the drying gas inside the flow space 140 sufficiently uniform.

[0107] As described above, according to one embodiment of the present disclosure, the drying gas may flow in the first flow space 141 and the second flow space 142 inside the gas nozzle 100 or the flow rate may be sufficiently uniform and then be injected through the injection hole 125. Therefore, the drying gas may be injected to the electrode plate ES in a state where the flow rate and / or flow rate deviation in the length direction Y of the gas nozzle 100, i.e., the width direction of the electrode plate, is small (see Figure 2d ).

[0108] In addition, according to one embodiment, when the gas nozzle 100 is coupled to the first chamber 210, the first nozzle body 110 is inserted into the first gas supply space 215, so the first nozzle body 110 can be used to make the flow or flow rate of the drying gas uniform. Therefore, there is no need to install or change a separate structure for making the flow uniform in the first gas supply space 215 of the first chamber 210. In addition, if the flow performance needs to be improved, only the gas nozzle 100 needs to be replaced, so it is easy to maintain and repair.

[0109] Figure 3a 1 is a partially cutaway perspective view showing a gas nozzle 100 for drying an electrode plate ES according to another embodiment of the present disclosure, Figure 3b yes Figure 3a A cross-sectional view of the gas nozzle 100 is shown, Figure 3c yes Figure 3b A schematic diagram of the flow of drying gas in the gas nozzle 100 is shown, Figure 3dThe figure shows the simulated drying gas flow through Figure 3c A graph of the results for the gas nozzle 100 is shown. Figure 3d The drying gas flow rate in the cross section perpendicular to the second direction Y is shown.

[0110] and Figure 2a to Figure 2d Like the gas nozzle 100a shown, Figure 3a to Figure 3d The illustrated gas nozzle 100 or 100 b may include a first nozzle body 110 a , a second nozzle body 120 , and a partition plate 130 . Figure 3a to Figure 3d The gas nozzle 100b shown is Figure 2a to Figure 2d The gas nozzle 100a shown is different in that there is a difference in the shape of a portion of the first nozzle body 110a. Therefore, the configuration of the second nozzle body 120 and the partition plate 130 and the configuration of the first nozzle body 110a that are the same as or similar to the configuration of the gas nozzle 100a will be described with reference to FIG. Figure 2a to Figure 2d The description will be replaced by the description of the configuration that is different.

[0111] The first nozzle body 110a may include at least one inflow opening 115a configured to allow a drying gas to flow into the first nozzle body 110a. At least a portion of the first nozzle body 110a may have a shape protruding toward the first gas supply space 215 of the first chamber 210 to be disposed inside the first chamber 210.

[0112] The first nozzle body 110 a may include a first sidewall 112 connected to the second sidewall 122 of the second nozzle body 120 and a cover plate 113 covering the first sidewall 112 .

[0113] The first sidewall 112 may extend from both ends of the partition plate 130 in the first direction Z. The first sidewall 112 may be connected to the second sidewall 122. The first sidewall 112 may extend from both ends of the partition plate 130 in the third direction X in the first direction Z. In addition, the first sidewall 112 may include portions extending in the first direction Z from both ends of the partition plate 130 in the second direction Y.

[0114] The cover plate 113 may include: a first portion 113a, which is separated from the upper end of the first side wall 112; and a second portion 113b, which extends from both ends of the first portion 113a in the third direction X. The cover plate 113 may include an upside-down U-Shape cross-section or a rectangular bracket shape. That is, the cover plate 113 may have a cross-sectional shape in which two second portions 113b extending toward the second side wall 122 are connected to the first portion 113a at both ends of the first portion 113a. Figure 3a to Figure 3d In the illustrated gas nozzle 100 b , at least one inflow opening 115 a may be formed between an outer surface of the first sidewall 112 and the second portion 113 b .

[0115] The first interval T1 between the outer side surface of the first side wall 112 and the second portion 113b serves as a space for the drying gas to flow in from the first gas supply space 215, and the second interval T2 between the upper end of the first side wall 112 and the first portion 113a serves as a space for the drying gas to be discharged into the first flow space 141. That is, the inflow opening 115a may include the first interval T1 and the second interval T2.

[0116] The flow direction may be changed when the drying gas is discharged into the first flow space 141 after passing through the inflow opening 115 a. Therefore, the drying gas passing through the inflow opening 115 a may diffuse in the first flow space 141, and the flow or flow velocity may become uniform or more uniform (homogenized), and then may move to the second flow space 142 through the at least one communication hole 135.

[0117] The first interval T1 and the second interval T2 may have the same or similar values ​​so that the flow properties such as flow rate of the drying gas will not change significantly when the drying gas flows through the first interval T1 and the second interval T2 provided as the inflow opening 115a, and the drying gas flows smoothly. For example, the value of the second interval T2 may be 0.7 to 1.3 times that of the first interval T1.

[0118] The height of the second portion 113b may be greater than or equal to 10% and less than or equal to 90% of the height of the first side wall 112. For example, the height of the second portion 113b may be greater than or equal to 10%, greater than or equal to 20%, greater than or equal to 30%, greater than or equal to 40%, greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, greater than or equal to 80%, or less than or equal to 90% of the height of the first side wall 112. That is, the second portion 113b may have a shape that covers greater than or equal to 10% and less than or equal to 90% of the area of ​​the first side wall 112.

[0119] The height of the second portion 113b corresponds to the length of the inlet opening 115a. Therefore, when the height of the inlet opening 115a is insufficient, for example, less than 10%, the effect of the flow direction conversion when discharged into the first flow space 141 is reduced. In addition, when the height of the inlet opening 115a is too large, for example, more than 90%, it is difficult for the drying gas in the first gas supply space 215 to flow into the inlet side of the inlet opening 115a, resulting in an increase in flow resistance.

[0120] exist Figure 3a to Figure 3d In the embodiment shown, the total cross-sectional area of ​​at least one connecting hole 135 may be greater than the total cross-sectional area of ​​at least one inflow opening 115a. Figure 3d As shown, the drying gas diffuses into the second flow space 142 in a state where the flow rate is lower than that in the process of passing through the inflow opening 115a during the process of passing through the communication hole 135, so that the flow or flow rate can be uniform. Figure 3a to Figure 3d In the illustrated embodiment, the total cross-sectional area of ​​the inlet opening 115 a is defined as the cross-sectional area of ​​the inlet side of the inlet opening 115 a .

[0121] The total cross-sectional area of ​​the plurality of injection holes 125 may be greater than the total cross-sectional area of ​​the at least one communication hole 135. Figure 3d As shown, the drying gas may be sprayed onto the electrode plate ES in a state where the flow rate is reduced when passing through the spray holes 125 to dry the electrode plate ES.

[0122] In addition, the total cross-sectional area of ​​at least one communication hole 135 may be greater than the total cross-sectional area of ​​at least one inflow opening 115a, and the total cross-sectional area of ​​the plurality of injection holes 125 may be greater than the total cross-sectional area of ​​at least one communication hole 135. Therefore, the flow velocity of the drying gas decreases when passing through the communication hole 135 and the injection hole 125 in sequence, so that the flow velocity can be uniform.

[0123] As described above, according to an embodiment of the present disclosure, the drying gas can be sprayed through the spray hole 125 after the flow velocity in the first flow space 141 and the second flow space 142 inside the gas nozzle 100 is sufficiently uniform. 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, is small. Therefore, according to the embodiment, even if the electrode plate ES is wide, it is possible to reduce defects such as cracks and warping on both sides of the electrode plate ES, and even if the electrode plate ES is wide, it is possible to improve the quality of the electrode plate ES (refer to Figure 3d ).

[0124] Figure 4 is a perspective view showing an electrode plate drying device according to a comparative example.

[0125] Reference Figure 4 The electrode plate drying device 20 according to the comparative example and the electrode plate drying device according to the Figure 1 The electrode plate drying device 200 of the illustrated embodiment is different in that guide vanes 22 are installed 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.

[0126] The electrode plate drying device 20 according to the comparative example accommodates the first chamber 21 and the second chamber 23 inside the main chamber 25. The electrode plate ES to be dried may be disposed between the first chamber 21 and the second chamber 23.

[0127] The first chamber 21 may have a first inlet 21a into which the drying gas flows. The drying gas flowing in through the first inlet 21a may be contained in the first gas supply space 21c. In the first chamber 21, a guide vane 22 may be installed in a portion adjacent to the first inlet 21a in the first gas supply space 21c. The guide vane 22 may have a shape divided into a plurality of regions so as to disperse the gas flowing in from the first inlet 21a.

[0128] 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.

[0129] 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.

[0130] The drying gas injected from the gas nozzle may be exhausted to the outside of the main chamber 25 through the first exhaust port 25 a and the second exhaust port 25 b after drying the electrode plate ES.

[0131] Figure 5 1 is a partially cutaway perspective view showing a gas nozzle for drying an electrode plate according to a first comparative example.

[0132] Reference Figure 5 The electrode plate drying gas nozzle 10 according to the first comparative example may include a nozzle body 11 coupled to a substrate 21 b of a first chamber 21 .

[0133] The nozzle body 11 may include a first plate 11a formed with an inflow opening 13 and a second plate 11b formed with a spray hole 14. The inflow opening 13 may include a plurality of perforations punched in the first plate 11a. The spray hole 14 may include a plurality of perforations punched in the second plate 11b. Each of the inflow opening 13 and the spray hole 14 may be formed as a circular hole.

[0134] Figure 6 is a cross-sectional view showing a gas nozzle for drying an electrode plate according to a second comparative example.

[0135] according to Figure 6 The electrode plate drying gas nozzle 10 of the second comparative example shown in FIG. Figure 5 The electrode plate drying gas nozzle 10 of the first comparative example shown is different in that it further includes a flow obstruction portion 15

[0136] The flow obstruction part 15 may have a shape covering a part of both sides of the first plate 11a in the width direction of the nozzle body 11. The flow obstruction part 15 may be formed of a mesh member that restricts the flow of the drying gas.

[0137] 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. These changes and modifications belong to the scope of the attached claims.

[0138] Figure 7a The simulation is shown according to Figure 5 The graph shows the results of the flow of the drying gas in the first comparative example. Figure 7b The simulation is shown according to Figure 6 The graphs shown are results of the flow of the drying gas in the second comparative example. Figure 7c The simulation is shown according to Figure 2a to Figure 2d FIG. 1 is a diagram showing the results of the flow of the drying gas according to the first embodiment. Figure 7d The simulation is shown according to Figure 3a to Figure 3d FIG. 1 is a diagram showing the results of the flow of the drying gas according to the second embodiment.

[0139] Figures 7a to 7d 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 for measuring the flow rate of the drying gas 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 width direction Y of the electrode plate, and a third portion OS away from the first inlet 211, 21a along the width direction Y of the electrode plate.

[0140] Figure 7a yes Figure 5 The gas nozzle 10 shown is mounted on Figure 4 The simulation results of the first comparative example in the first chamber 21 of the electrode plate drying device 20 are shown. Figure 7b yes Figure 6 The gas nozzle 10 shown is mounted on Figure 4 The simulation results of the second comparative example in the first chamber 21 of the electrode plate drying device 20 are shown. Figure 7c yes Figure 2a to Figure 2d The gas nozzle 100a shown is installed in Figure 1 The simulation results of the first embodiment in the first chamber 210 of the electrode plate drying device 200 are shown. Figure 7d yes Figure 3a to Figure 3d The gas nozzle 100b is shown mounted on Figure 1The simulation results of the second embodiment in the first chamber 210 of the electrode plate drying device 200 are shown.

[0141] Figure 7a and Figure 7b Comparative example and Figure 7c and Figure 7d The experiments were conducted under the same conditions except for the structure of the gas nozzle and whether the guide vanes 22 were installed.

[0142] exist Figure 7a and Figure 7b Comparative Examples and Figure 7c and Figure 7d In the embodiment of the present invention, 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. Figure 7a and Figure 7b Comparative example and Figure 7c and Figure 7d In the embodiment of FIG. 1 , the width WS of the electrode plate is about 1500 mm, and 10 gas nozzles 100 , 10 are arranged in the first chamber 210 , 21 .

[0143] In application Figure 7a In the case of the gas nozzle 10 of the first comparative example, the diameter of each inflow opening 13 is 8 mm, and the total cross-sectional area of ​​the plurality of inflow openings 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).

[0144] Application Figure 7b The gas nozzle 10 of the second comparative example is different from the first comparative example in that a flow obstruction portion 15 is installed. In the case of the second comparative example, the area of ​​the first plate 11a not covered by the flow obstruction portion 15, that is, the area of ​​the open area is about 40%, and the shape of the open area is the same as that of the first comparative example.

[0145] In application Figure 7c In the case of the gas nozzle 100a of the first embodiment, the inflow opening 115 includes a slit-shaped hole, the communication hole 135 includes two slit-shaped holes, and the injection hole 125 includes a plurality of perforations. The widths of the slits of the inflow opening 115 and the communication hole 135 are 4 mm respectively, and the total cross-sectional area of ​​the inflow opening 115 is about 6000 mm 2 The diameter of each injection hole 125 is 10 mm, and the total cross-sectional area of ​​the plurality of injection holes 125 is 53780 mm 2(square millimeters).

[0146] Application Figure 7d The gas nozzle 100b of the second embodiment includes two inflow openings 115a arranged on both sides of the first side wall 112, and the interval between each inflow opening 115a is 2mm, and the total cross-sectional area of ​​the inflow openings 115 is 6000mm. 2 The connecting hole 135 includes two slit-shaped holes, and the width of the slit of the connecting hole 135 is 4 mm. The diameter of each injection hole 125 is 10 mm, and the total cross-sectional area of ​​the plurality of injection holes 125 is 53780 mm 2 (square millimeters).

[0147] exist Figure 7a and Figure 7b 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 in the width direction of the electrode plate is low, while the flow velocity of the first portion DS and the third portion OS located at both sides in the width direction of the electrode plate 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.

[0148] exist Figure 7c and Figure 7d In the case of the first and second embodiments shown, overall, the flow rate of the second portion CT located at the center in the width direction is increased compared to the first and second comparative examples, while the flow rates of the first portion DS and the third portion OS located on both sides of the electrode plate in the width direction are similar.

[0149] That is, it can be seen that the speed deviations of both side portions DS, OS in the width direction and the center portion CT in the width direction of the electrode plate are reduced in the first and second embodiments as compared with the first and second comparative examples.

[0150] Figure 8 Graphs comparing the difference in average speed according to the width direction position of the electrode plate between the example of the present disclosure and the comparative example.

[0151] Figure 8 It is for comparison Figure 7a and Figure 7b The first comparative example and the second comparative example shown in FIG. Figure 7c and Figure 7d The graph shown is a graph quantifying the average flow velocity in the width direction of the electrode plate at 5 mm above the electrode plate surface based on the flow deviation of the first embodiment and the second embodiment.

[0152] from Figure 8It can be seen that, compared with the first and second comparative examples, in the first and second embodiments, the flow rate in the central portion in the width direction increases, while the flow rates in the two side portions DS and OS in the width direction of the electrode plate are approximately the same.

[0153] The following Table 1 shows the average flow rate and deviation of the first comparative example, the second comparative example, the first embodiment, and the second embodiment. 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.

[0154] As can be seen from Table 1, it is confirmed that, in the first and second embodiments, the flow velocity deviation in the width direction of the electrode plate is greatly reduced compared with the first and second comparative examples, and therefore the flow rate deviation is also reduced.

[0155] [Table 1]

[0156]

[0157] 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.

[0158] The above content is only an example of applying the principle of the present disclosure, and other configurations may also be included without departing from the scope of the present invention. In addition, the present disclosure may be implemented by deleting some components in the above embodiments, or by combining the embodiments with each other.

Claims

1. An electrode plate drying gas nozzle, which is coupled to a chamber of an electrode plate drying device including a chamber for supplying a drying gas for drying an electrode plate, the electrode plate drying gas nozzle comprising: a first nozzle body including at least one inflow opening configured to allow a drying gas to flow into an interior of the first nozzle body; a second nozzle body connected to the first nozzle body and comprising a plurality of injection holes configured to inject a drying gas to the outside of the gas nozzle; as well as a partition plate disposed between the first nozzle body and the second nozzle body and including at least one communication hole configured to allow a drying gas to flow from the at least one inflow opening to the plurality of injection holes, At least a portion of the first nozzle body protrudes toward a gas supply space of the chamber to be disposed inside the chamber.

2. The gas nozzle for drying the electrode plate according to claim 1, wherein: The second nozzle body is disposed outside the chamber.

3. The gas nozzle for drying the electrode plate according to claim 1, wherein: The first nozzle body includes a first plate formed with the at least one inflow opening and first side walls extending from both ends of the first plate.

4. The gas nozzle for drying the electrode plate according to claim 3, wherein: The at least one inflow opening has a slit shape extending across the first plate along a length direction of the first nozzle body.

5. The gas nozzle for drying the electrode plate according to claim 4, wherein: The at least one communication hole has a slit shape that crosses the partition plate along a length direction of the partition plate.

6. The gas nozzle for drying the electrode plate according to claim 5, wherein: The first plate and the partition plate are spaced apart from each other in a first direction, The at least one communication hole is disposed not to face the at least one inflow opening with reference to the first direction.

7. The gas nozzle for drying the electrode plate according to claim 5, wherein: The number of the at least one communication hole is greater than the number of the at least one inflow opening.

8. The gas nozzle for drying the electrode plate according to claim 1, wherein: The second nozzle body includes a second plate formed with the plurality of injection holes and second side walls extending from both ends of the second plate, The first nozzle body includes a first side wall connected to the second side wall and a cover plate covering the first side wall.

9. The gas nozzle for drying the electrode plate according to claim 8, wherein: The cover plate comprises: a first portion spaced apart from an upper end portion of the first side wall; and The second part extends from both ends of the first part, The at least one inflow opening is formed between an outer side surface of the first side wall and the second portion.

10. The gas nozzle for drying the electrode plate according to claim 8, wherein: The cover plate includes an inverted U-shaped cross-section.

11. The gas nozzle for drying the electrode plate according to claim 9, wherein: A second distance between an upper end portion of the first side wall and the first portion has a value that is 0.7 to 1.3 times greater than a first distance between an outer side surface of the first side wall and the second portion.

12. The gas nozzle for drying the electrode plate according to claim 9, wherein: A value of the height of the second portion is greater than or equal to 10% and less than or equal to 90% of the height of the first side wall.

13. The gas nozzle for drying the electrode plate according to claim 1, wherein: The total cross-sectional area of ​​the at least one communication hole has a value greater than the total cross-sectional area of ​​the at least one inflow opening.

14. The gas nozzle for drying the electrode plate according to claim 1, wherein: The partition plate partitions a flow space formed between the first nozzle body and the second nozzle body into a first flow space opposite to the first nozzle body and a second flow space opposite to the second nozzle body.

15. The gas nozzle for drying the electrode plate according to claim 2, wherein: The second nozzle body includes a coupling portion coupled to the chamber by a fastening member, The first nozzle body has a shape protruding from the coupling portion toward a gas supply space of the chamber.

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

17. An electrode plate drying device, comprising: The chamber is formed with 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 to communicate with the gas supply space of the chamber, The plurality of gas nozzles comprises: a first nozzle body including at least one inflow opening configured to allow the drying gas in the gas supply space to flow into the interior of the first nozzle body; a second nozzle body connected to the first nozzle body and comprising a plurality of spray holes configured to spray a drying gas to the electrode plate; and a partition plate disposed between the first nozzle body and the second nozzle body and including at least one communication hole configured to allow a drying gas to flow from the at least one inflow opening to the plurality of injection holes, At least a portion of the first nozzle body has a shape protruding toward the gas supply space to be disposed inside the gas supply space of the chamber.

18. The electrode plate drying device according to claim 17, wherein: The second nozzle body includes a coupling portion coupled to the chamber by a fastening member, The first nozzle body has a shape protruding from the coupling portion toward the gas supply space of the chamber.

19. The electrode plate drying device according to claim 17, wherein: The chamber includes an inlet for supplying a drying gas from outside the chamber to the gas supply space. The inlet port is arranged to supply the drying gas along the longitudinal direction of the gas nozzle.

20. The electrode plate drying device according to claim 17, 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 for spraying 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.

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