Dry powder supply device

Abstract

A dry powder supply device includes a feeder containing fibrous dry powder including an active material, a conductive material, and a binder, and a tank adjacent to the feeder, the tank including a bottom and a plurality of bottom pattern portions protruding from an inner surface of the bottom, the bottom of the tank is configured to move the fibrous dry powder discharged from the feeder in a first direction.

Description

Technical Field

[0001] The present disclosure relates to a dry powder supply device. Background Art

[0002] Generally, a rechargeable battery is a battery that can be charged and discharged. A device for manufacturing a dry electrode of a rechargeable battery without using a solvent is needed. For example, a free-standing film for a dry electrode can be manufactured by supplying a fibrous dry powder (including an active material, a binder, and a conductive material) to a roller for calendering, and the dry electrode can be manufactured by laminating the free-standing film on a current collector. Summary of the invention

[0003] Aspects of an example embodiment provide a dry powder supply device, which includes: a feeder that discharges fibrous dry powder, the fibrous dry powder including an active substance, a conductive material, and a binder; and a groove, adjacent to the feeder and including a bottom surface and a plurality of bottom pattern portions protruding from the bottom surface, the bottom surface moving the dry powder discharged from the feeder in a first direction.

[0004] The plurality of bottom pattern portions may protrude from the bottom surface at an obtuse angle.

[0005] The plurality of bottom pattern portions may form an obtuse angle with respect to the bottom surface in the first direction.

[0006] The plurality of bottom pattern portions may be spaced apart from each other in the first direction.

[0007] The plurality of bottom pattern portions may extend in a second direction intersecting the first direction in a plan view.

[0008] The plurality of bottom pattern portions may have the same shape.

[0009] The plurality of bottom pattern portions may have a linear shape in a plan view.

[0010] The plurality of bottom pattern portions may have a V-shape in a plan view.

[0011] The plurality of bottom pattern portions may have an M-shape in a plan view.

[0012] The plurality of bottom pattern portions may have different shapes.

[0013] The plurality of bottom pattern portions may include a first bottom pattern portion and a second bottom pattern portion spaced apart from each other in the first direction, the first bottom pattern portion may have a V-shape in a plan view, and the second bottom pattern portion may have a line shape in a plan view.

[0014] The trough may further include a vibrator configured to vibrate the bottom surface.

[0015] The dry powder supply device may further include a chute disposed between the feeder and the trough and guiding the dry powder discharged from the feeder to the trough.

[0016] The chute may include: a main body including an inner space through which the dry powder passes; and a plurality of inner pattern parts disposed in the inner space.

[0017] The body may further include: an inlet provided at an upper side of the inner space, through which the dry powder discharged from the feeder is supplied; and an outlet provided at a lower side of the inner space to discharge the dry powder to the trough and having a width wider than that of the inlet.

[0018] The plurality of inner pattern portions may be distributed and disposed in the inner space from the inlet to the outlet.

[0019] The plurality of inner pattern portions may have a triangular shape in a third direction intersecting the first direction.

[0020] Each of the plurality of inner pattern portions may include a mesh extending from an inlet to an outer area of ​​an outlet.

[0021] The net may include: a first subnet adjacent to the inlet and including a first through hole; a second subnet extending from the first subnet toward the outlet and including a second through hole larger than the first through hole; and a third subnet extending from the second subnet toward the outlet and including a third through hole larger than the second through hole.

[0022] Other aspects of the example embodiments provide a dry powder supply device, which includes: a feeder that discharges fibrous dry powder, the fibrous dry powder including an active substance, a conductive material, and a binder; a trough, which is adjacent to the feeder and moves the dry powder discharged from the feeder in one direction; and a chute, which is arranged between the feeder and the trough and includes a main body including an internal space and a plurality of internal pattern portions arranged in the internal space, and the internal space guides the dry powder discharged from the feeder to the trough. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Features will become apparent to those skilled in the art by describing in detail exemplary embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 is a side view showing a dry powder supply device according to an embodiment.

[0025] Figure 2 Yes Display Figure 1 A plan view of an enlarged view of the groove in FIG.

[0026] Figure 3 is along Figure 2 A cross-sectional view taken along line III-III.

[0027] Figure 4 is a plan view showing an example of a slot of a dry powder supply device according to an embodiment.

[0028] Figure 5 Yes Display Figure 1 Front view of an enlarged view of the chute in FIG.

[0029] Figure 6 is along Figure 5 A cross-sectional view taken along line VI-VI.

[0030] Figure 7 is a front view showing an enlarged view of a chute of a dry powder supply device according to another embodiment.

[0031] Figure 8 is along Figure 7 A cross-sectional view taken along line VIII-VIII. DETAILED DESCRIPTION

[0032] Example embodiments will now be described more fully below with reference to the accompanying drawings; however, they may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the exemplary implementations to those skilled in the art.

[0033] In the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Additionally, it will be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. Like reference numerals refer to like elements throughout.

[0034] In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprising” or “including” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0035] In the following, reference will be made to Figures 1 to 8 A dry powder supply device according to an embodiment is described.

[0036] For example, the dry powder supply device according to the embodiment may be a device for supplying fibrous dry powder for manufacturing a dry electrode of a rechargeable battery to a roller for calendering. In another example, the dry powder supply device according to the embodiment may be a device for supplying fibrous dry powder to various known devices for manufacturing dry electrodes.

[0037] Figure 1 2 is a side view showing a dry powder supply device according to an embodiment. Figure 1 The dry powder supply device according to the embodiment may move the fibrous dry powder DP in the first direction X to supply the fibrous dry powder DP to the dry electrode manufacturing device (eg, to any suitable dry electrode manufacturing device).

[0038] The fibrous dry powder DP may include an active substance, a conductive material and a binder. For example, the active substance may include any suitable electrode active substance, the conductive material may include any suitable conductive material, and the binder may include any suitable fibrous binder, such as polytetrafluoroethylene (PTFE).

[0039] For example, the dry electrode manufacturing device adjacent to the dry powder supply device may be a device including any suitable calendering rollers. For example, the calendering rollers may be used to calender the fibrous dry powder DP to manufacture a self-supporting film.

[0040] like Figure 1 As shown, the dry powder supply device according to the embodiment may include a feeder 100, a trough 200, and a chute 300. The chute 300 may be between the feeder 100 and the trough 200.

[0041] The feeder 100 can discharge a fibrous dry powder DP (which includes an active substance, a conductive material, and a binder). The feeder 100 can use any suitable fixed amount control part (or fixed amount control unit) to discharge the dry powder DP in a fixed amount. The dry powder DP discharged from the feeder 100 can be moved to the trough 200 through the chute 300.

[0042] The trough 200 may be adjacent to the feeder 100, and the chute 300 is interposed between the trough 200 and the feeder 100. The trough 200 may be disposed below the feeder 100, and the chute 300 is interposed between the trough 200 and the feeder 100, for example, the distance between the top of the trough 200 and the surface supporting the dry powder supply device (in the third direction Z) may be smaller than the distance between the bottom of the feeder 100 and the surface supporting the dry powder supply device (in the third direction Z). The dry powder DP moved from the feeder 100 to the trough 200 may move through the trough 200 in the first direction X (e.g., parallel to the surface supporting the dry powder supply device) to be supplied to any suitable dry electrode manufacturing device including a calender roller, etc.

[0043] Figure 2 yes Figure 1 An enlarged top view of the groove 200 in FIG. Figure 3 is along Figure 2 A cross-sectional view taken along line III-III.

[0044] Reference Figures 1 to 3, the groove 200 may include a bottom 210, a plurality of bottom pattern portions 220, and a vibrator 230. For example, referring to Figures 1 to 3 , the groove 200 may have the shape of an open groove or an open channel extending parallel to the surface supporting the dry powder supply device, so that the bottom 210 of the groove 200 may be the bottom of the groove or channel, the sidewalls may extend from the bottom 210 of the groove 200 along the length of the bottom 210, and the top of the groove 200 may be open. For example, as Figures 1 to 3 As shown, the bottom 210 of the groove 200 may be between the bottom pattern portion 220 and the vibrator 230 .

[0045] For example, Figures 1 to 3 As shown, the bottom 210 of the trough 200 may include an inner surface 210a facing the feeder 100 and an outer surface 210b opposite to the inner surface 210a and facing the vibrator 230. The bottom 210 may extend longitudinally in a first direction X, and may have a predetermined width in a second direction Y intersecting the first direction X. The bottom 210 may be vibrated by the vibrator 230, and the dry powder DP discharged from the feeder 100 into the trough 200 (i.e., the dry powder DP on the inner surface 210a of the bottom 210) may move in the first direction X along the inner surface 210a of the bottom 210.

[0046] The plurality of bottom pattern portions 220 may protrude from the inner surface 210a of the bottom 210 in a third direction Z intersecting the first direction X and the second direction Y. For example, the plurality of bottom pattern portions 220 may protrude from the inner surface 210a toward the feeder 100. Figure 2 As shown in , the plurality of bottom pattern portions 220 may be spaced apart from each other along the first direction X, and each of the plurality of bottom pattern portions 220 may extend continuously in the second direction Y along the entire width of the bottom 210. In an implementation, the plurality of bottom pattern portions 220 protrude from the bottom 210 toward the feeder 100, and the dry powder DP passing along the bottom 210 may be widely dispersed in the second direction Y on the bottom 210 by the plurality of bottom pattern portions 220 vibrating due to vibration of the bottom 210.

[0047] Each of the plurality of bottom pattern portions 220 may be inclined (e.g., tilted or angled) at an oblique angle relative to the inner surface 210a of the bottom 210, for example, each of the plurality of bottom pattern portions 220 may protrude from the inner surface 210a of the bottom 210 at an obtuse angle α relative to the inner surface 210a of the bottom 210. For example, the plurality of bottom pattern portions 220 may form an obtuse angle relative to the inner surface 210a of the bottom 210 in the first direction X, for example, the plurality of bottom pattern portions 220 may be oriented to be inclined away from the feeder 100. In an implementation, the plurality of bottom pattern portions 220 protrude at an oblique angle from the inner surface 210a of the bottom 210 in a direction oriented away from the feeder 100, and the dry powder DP passing along the bottom 210 may be widely dispersed in the first direction X and the second direction Y on the inner surface 210a of the bottom 210 by the plurality of bottom pattern portions 220 vibrating due to the vibration of the bottom 210.

[0048] The plurality of bottom pattern portions 220 may be spaced apart from each other in the first direction X. The plurality of bottom pattern portions 220 may extend in a second direction Y intersecting the first direction X in a plan view. In an implementation, the plurality of bottom pattern portions 220 extend in the second direction Y (which is a width direction of the bottom 210) to protrude from the inner surface 210a of the bottom 210, and the dry powder DP passing along the bottom 210 may be widely dispersed in the second direction Y on the bottom 210 by the plurality of bottom pattern portions 220 vibrating due to vibration of the bottom 210.

[0049] The plurality of bottom pattern portions 220 may have the same shape. Figure 2 As shown in , in a plan view, multiple bottom pattern portions 220 may have a linear shape extending in the second direction Y (which is the width direction of the bottom 210), for example, in a top view, multiple bottom pattern portions 220 may have a linear shape parallel to each other.

[0050] Figure 4 is a plan view of an example of a slot of a dry powder supply device according to an embodiment.

[0051] For example, refer to Figure 4 , in a plan view (e.g., top view), the plurality of bottom pattern portions 220 may have a V-shape extending in the second direction Y. For example, each of the plurality of bottom pattern portions 220 may have a bent shape, for example, may include a single bent portion, and adjacent bottom pattern portions of the plurality of bottom pattern portions 220 are aligned with each other and have the same V-shape as viewed in the top view.

[0052] For example, refer to Figure 4In the plan view, the plurality of bottom pattern portions 220 may have an M-shape extending in the second direction Y. For example, each of the plurality of bottom pattern portions 220 may have a bent shape, for example, may include a plurality of bent portions, and as viewed in a top view, adjacent bottom pattern portions of the plurality of bottom pattern portions 220 are aligned with each other and have the same M-shape.

[0053] For example, refer to Figure 4 , as viewed in a top view, the plurality of bottom pattern portions 220 may have different shapes. For example, the plurality of bottom pattern portions 220 may include a first bottom pattern portion 221 and a second bottom pattern portion 222 spaced apart in a first direction X. The first bottom pattern portion 221 may have a V-shape extending in a second direction Y in a plan view, and the second bottom pattern portion 222 may have a linear shape extending in a second direction Y in a plan view. As another example, each of the plurality of bottom pattern portions 220 may have various shapes in a plan view, such as a curved shape, a circular shape, an elliptical shape, a quadrilateral shape, a triangular shape, and an irregular shape.

[0054] Reference Figure 1 The vibrator 230 may be disposed on the outer surface 210b of the bottom 210 of the tank 200. The vibrator 230 may vibrate the bottom 210 of the tank 200 using any suitable vibration mechanism.

[0055] like Figure 1 As further shown in FIG. 1 , the chute 300 may be disposed between the feeder 100 and the trough 200. The chute 300 may guide the dry powder DP discharged from the feeder 100 to the trough 200. The dry powder DP passing through the chute 300 from the feeder 100 may be dispersed in the second direction Y, which is the width direction of the trough 200.

[0056] Figure 5 yes Figure 1 An enlarged front view of the chute 300 in FIG. Figure 6 When facing along Figure 5 The view seen when the section is taken along line VI-VI. Note that Figure 6 Shows that when facing along Figure 5 The depth view of the bevel groove 300 as seen when the line VI-VI is cut halfway.

[0057] Reference Figure 1 , Figure 5 and Figure 6 , the chute 300 may include a body 310 and a plurality of inner pattern portions 320 .

[0058] like Figure 5As shown in FIG. 1 , the body 310 may include an internal space IS through which the dry powder DP passes; an inlet 311 through which the dry powder DP discharged from the feeder 100 is supplied to the body 310; and an outlet 312 through which the dry powder DP is discharged from the body 310 into the tank 200. For example, Figure 5 As shown, the inlet 311 and the outlet 312 may be located on opposite sides of the inner space IS of the body 310 along the third direction Z.

[0059] The internal space IS may be formed by expanding in the third direction Z (which is the direction in which the body 310 extends) from the inlet 311 to the outlet 312. That is, the width of the body 310 may increase (e.g., gradually) in a direction oriented from the inlet 311 toward the outlet 312. The internal space IS may have any suitable shape of an internal space of a chute, such as a cone or a pyramid.

[0060] The inlet 311 may be disposed at an upper side of the internal space IS in the third direction Z, for example, the inlet 311 may face the feeder 100. The inlet 311 may be a portion receiving the dry powder DP discharged from the feeder 100.

[0061] The outlet 312 may be disposed at the lower side of the internal space IS in the third direction Z, for example, the outlet 312 may face the groove 200. The outlet 312 may be a portion from which the dry powder DP is discharged through the internal space IS from the inlet 311. The dry powder DP may be discharged from the outlet 312 to the groove 200. The outlet 312 may have a width wider than the width of the inlet 311 (for example, in the first direction X and / or the second direction Y). The width of the outlet 312 may be greater than the width of the inlet 311. For example, the width of the outlet 312 may include at least one of the width in the first direction X and the width in the second direction Y.

[0062] A plurality of inner pattern portions 320 may be disposed in the inner space IS of the body 310. The plurality of inner pattern portions 320 may be distributed and disposed in the inner space IS from the inlet 311 of the body 310 to the outlet 312 of the body 310.

[0063] For example, Figure 6 As shown, the plurality of inner pattern portions 320 may extend in the first direction X to be connected (e.g., directly connected) to the inner wall of the body 310. For example, each of the plurality of inner pattern portions 320 may extend continuously in the first direction X to be connected (e.g., directly connected) to the opposite inner wall of the body 310. The plurality of inner pattern portions 320 may be distributed and arranged in the second direction Y and the third direction Z (e.g., spaced apart from each other) in the inner space IS of the body 310. For example, referring to Figure 5, the rows of the inner pattern portions 320 may be offset relative to each other in the second direction Y, but with respect to Figure 6 The observer can still face Figure 5 The three inner pattern parts 320 on the line VI-VI and along the second direction Y from Figure 5 The other two inner pattern portions 320 are offset from line VI-VI.

[0064] For example, Figure 5 As shown, each of the plurality of inner pattern portions 320 may have a triangular shape in the third direction Z, and in the present application, “a triangular shape in the third direction Z” refers to a triangular cross-sectional shape oriented in a plane defined by the second direction Y and the third direction Z with a width increasing toward the outlet 312. In another example, each of the plurality of inner pattern portions 320 may have any suitable polygonal shape (e.g., a quadrilateral shape, a pentagonal shape, a hexagonal shape, etc.), a circular shape, an elliptical shape, a linear shape, a curved shape, etc.

[0065] For example, multiple internal pattern portions 320 can be distributed and arranged in the second direction Y and the third direction Z (e.g., spaced apart from each other) in the internal space IS of the main body 310, so that the dry powder DP supplied from the feeder 100 to the inlet 311 collides with the multiple internal pattern portions 320 and is thereby widely dispersed in the second direction Y (e.g., via offset and spaced-apart triangular shapes) while passing through the internal space IS along the third direction Z.

[0066] Figure 7 is a front view of a chute 300 ′ of a dry powder supply device according to an example embodiment. Figure 8 It is along Figure 7 A cross-sectional view taken along line VIII-VIII of FIG. Note that Figure 8 Shows that when facing along Figure 7 The depth view of the line VIII-VIII when cutting the halfway of the bevel groove 300' is seen.

[0067] For example, refer to Figure 1 , Figure 7 and Figure 8 , the dry powder supply device may include a feeder 100, a trough 200, and a chute 300' located therebetween. Each of the plurality of inner pattern portions 320 of the chute 300' may include a net extending from an inlet 311 of the body 310 toward an outer region of an outlet 312 of the body 310. For example, the net may extend from a central region of the inlet 311 to an outer region of the outlet 312 along an inner wall of the body 310, and the net may extend in a first direction X, a second direction Y, a third direction Z, or another direction to be connected to the inner wall of the body 310. For example, referring to Figure 7The plurality of inner pattern portions 320 may have a predetermined thickness along a radial direction of the inclined groove 300' and may be formed along an inner wall (ie, Figure 7 The dashed rectangle in FIG. 1 extends to surround the empty space of the interior space IS.

[0068] The mesh included in the inner pattern portion 320 may include a first sub-mesh 321, a second sub-mesh 322, and a third sub-mesh 323 (eg, stacked on top of each other in the third direction Z). Figure 8 As shown, the size of the holes in the first subnet to the third subnet may gradually increase from the inlet 311 toward the outlet 312 (e.g., Figure 8 A web is shown extending along the sidewall of the body 310 and spaced from the center of the chute 300'.

[0069] The first subnet 321 may be adjacent to the inlet 311 of the body 310 and may include a first through hole TH1. The second subnet 322 may extend from the first subnet 321 toward the outlet 312 and may include a second through hole TH2 that is larger than the first through hole TH1. The second subnet 322 may connect the first subnet 321 and the third subnet 323. The third subnet 323 may extend from the second subnet 322 toward the outlet 312 and may include a third through hole TH3 that is larger than the second through hole TH2.

[0070] For example, each of the multiple internal pattern portions 320 may include a net extending from the inlet 311 of the main body 310 to the external area of ​​the outlet 312 of the main body 310, so that the dry powder DP supplied from the feeder 100 to the inlet 311 passes through the first through holes TH1 of the first subnet 321 of the net, the second through holes TH2 of the second subnet 322 of the net, and the third through holes TH3 of the third subnet 323 of the net in sequence to be widely dispersed in the second direction Y while passing through the internal space IS along the third direction Z.

[0071] For example, in the dry powder supplying device according to the example embodiment, the dry powder DP discharged from the feeder 100 may collide with the plurality of inner pattern portions 320 while passing through the chute 300 (or chute 300') in the third direction Z to be widely dispersed in the second direction Y, thereby causing the dry powder DP discharged from the feeder 100 to move to the trough 200. The dry powder DP passing along the bottom 210 of the trough 200 in the first direction X may be widely dispersed in the second direction Y on the bottom 210 by the plurality of bottom pattern portions 220 vibrating due to the vibration of the bottom 210, thereby causing the dry powder DP passing along the bottom 210 of the trough 200 in the first direction X to move to the dry electrode manufacturing device.

[0072] As a summary and review, the dry powder supply device may include a feeder that discharges the fibrous dry powder and a slot that moves the dry powder discharged from the feeder in one direction to supply the dry powder to the roller for calendering. However, due to the low dispersibility and high cohesiveness of the fibrous dry powder, the dry powder discharged from the feeder may not be widely dispersed on the slot, so that a supply deviation may occur in the dry powder supplied to the roller for calendering.

[0073] In contrast, the example embodiment provides a dry powder supply device that manufactures a large-area dry electrode with improved uniformity because the supply deviation of the dry powder supplied to the roller for calendering is minimized by widely dispersing the fibrous dry powder discharged from the feeder on the groove. That is, the dry powder supply device according to the example embodiment includes an inner pattern portion within the inclined groove and a bottom pattern portion inside the groove to increase the dispersion distribution of the dry powder within the groove in a direction perpendicular to the length direction of the groove, thereby reducing the supply deviation and increasing the uniformity of the dry powder supplied to the calendering roller.

[0074] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and interpreted only in a general and descriptive sense and not for purposes of limitation. In some cases, as will be apparent to one of ordinary skill in the art at the time of filing of this application, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless expressly indicated otherwise. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of the invention as set forth in the appended claims.

Claims

1. A dry powder supply device, comprising: a feeder containing a fibrous dry powder, the fibrous dry powder comprising an active substance, a conductive material and a binder; as well as A trough is adjacent to the feeder, the trough comprising a bottom and a plurality of bottom pattern portions protruding from an inner surface of the bottom, the bottom of the trough being configured to move the fibrous dry powder discharged from the feeder in a first direction. 2 . The dry powder supply device according to claim 1 , wherein the plurality of bottom pattern portions protrude from the inner surface of the bottom at an obtuse angle. 3 . The dry powder supply device according to claim 2 , wherein the plurality of bottom pattern portions form an obtuse angle with respect to the inner surface of the bottom in the first direction. 4 . The dry powder feeding device according to claim 1 , wherein the plurality of bottom pattern portions are spaced apart from each other in the first direction. 5 . The dry powder feeding device according to claim 1 , wherein the plurality of bottom pattern portions extend in a second direction intersecting the first direction in a plan view. The dry powder supply device according to claim 5 , wherein the plurality of bottom pattern portions have the same shape. 7 . The dry powder supply device according to claim 6 , wherein the plurality of bottom pattern portions have a linear shape in the plan view. 8 . The dry powder supply device according to claim 6 , wherein the plurality of bottom pattern portions have a V-shape in the plan view. 9 . The dry powder supply device according to claim 6 , wherein the plurality of bottom pattern portions have an M shape in the plan view. 10 . The dry powder feeding device according to claim 5 , wherein the plurality of bottom pattern portions have shapes different from each other in the plan view.

11. The dry powder supply device according to claim 10, wherein the plurality of bottom pattern portions include a first bottom pattern portion and a second bottom pattern portion spaced apart from each other in the first direction, the first bottom pattern portion having a V-shape in the plan view, and the second bottom pattern portion having a line shape in the plan view. 12 . The dry powder supply device according to claim 1 , wherein the tank further comprises a vibrator configured to vibrate the bottom. 13 . The dry powder supply device according to claim 1 , further comprising a chute between the feeder and the trough, the chute being configured to guide the dry powder discharged from the feeder to the trough.

14. The dry powder supply device according to claim 13, wherein the chute comprises: a main body having an internal space through which the dry powder passes; as well as A plurality of interior pattern portions are provided in the interior space.

15. The dry powder supply device according to claim 14, wherein the main body further comprises: an inlet at an upper side of the inner space, through which the dry powder is discharged from the feeder into the chute; as well as An outlet at a lower side of the inner space, through which the dry powder is discharged from the chute to the trough, has a width wider than that of the inlet. 16 . The dry powder feeding device according to claim 15 , wherein the plurality of inner pattern portions are spaced apart from one another in the inner space from the inlet to the outlet. 17 . The dry powder supply device according to claim 16 , wherein the plurality of inner pattern portions have a triangular shape in a third direction intersecting the first direction. 18 . The dry powder feeding device of claim 15 , wherein each of the plurality of inner pattern portions comprises a mesh extending from the inlet to an outer area of ​​the outlet.

19. The dry powder supply device according to claim 18, wherein the net comprises: a first subnet, adjacent to the inlet and comprising a first through hole; a second subnet extending from the first subnet toward the outlet and comprising a second through hole larger than the first through hole; as well as The third subnet extends from the second subnet toward the outlet and includes a third through hole larger than the second through hole.

20. A dry powder supply device, comprising: a feeder containing a fibrous dry powder, the fibrous dry powder comprising an active substance, a conductive material and a binder; a trough adjacent to the feeder, the trough being configured to move the dry powder discharged from the feeder in one direction; as well as A chute between the feeder and the trough, the chute including a body having an inner space and a plurality of inner pattern portions in the inner space, the inner space guiding the dry powder discharged from the feeder to the trough.

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