Continuous dosing device for electrode material powder

Abstract

This invention relates to a continuous quantitative supply device for electrode material powder. The device includes: a hopper for receiving electrode material powder supplied from the outside and discharging the powder downwards; a grooved roller horizontally disposed below the hopper, having a plurality of powder conveying grooves extending circumferentially on its outer circumferential surface; a first drive unit for rotating the grooved roller; a pressure roller disposed parallel to the grooved roller, forcing the electrode material powder through the space between the pressure roller and the grooved roller and pressing the powder towards the inside of the powder conveying grooves; a scraper for separating the electrode material powder embedded in the powder conveying grooves of the grooved roller from the powder conveying grooves; and a calendering unit for passing the electrode material powder separated by the scraper through and calendering the powder. The continuous quantitative supply device for electrode material powder of the present invention, configured as described above, enables the manufacture of dry electrode films with uniform density and thickness by continuously and quantitatively supplying electrode material powder. Furthermore, since the supply amount of electrode material powder is easily adjustable, the production speed of the electrode film can be easily adjusted.

Description

Technical Field

[0001] This invention relates to a powder supply device for secondary battery electrode materials, and more specifically, to a continuous quantitative supply device for electrode material powder that enables the manufacture of dry electrode films with uniform density and thickness by continuously and quantitatively supplying secondary battery electrode material powder. Background Technology

[0002] Unlike primary batteries that are disposable, lithium-ion batteries are rechargeable and reusable, offering higher output power and superior charge / discharge performance compared to other rechargeable batteries. Consequently, lithium-ion batteries are being reused in a variety of fields, from mobile IT devices such as smartphones and laptops to power sources for electric vehicles and energy storage devices for storing electricity generated by wind or solar power.

[0003] As is well known, a secondary battery has a basic structure consisting of a positive electrode, a negative electrode, an electrolyte, and a separator. The positive and negative electrodes are manufactured into a secondary battery cell by dispersing or dissolving active materials, conductive materials, and binders in a solvent to make a slurry, coating the slurry onto a current collector, and then drying it.

[0004] However, wet electrode manufacturing methods using solvents sometimes produce defects such as pinholes or cracks during the drying process. These pinholes or cracks are caused by the evaporation of the original solvent. Furthermore, powder floatation can occur due to differences in solvent evaporation rates, which degrades electrode quality.

[0005] To address the aforementioned problems, a dry manufacturing method for producing electrodes without the use of solvents is known. This dry manufacturing method involves passing electrode material powder, comprising an active substance, a binder, and a conductive material, between calendering rolls. The electrode material powder that has passed through the calendering rolls is then laminated and fixed onto a current collector as a dry electrode film of a predetermined thickness.

[0006] Relatedly, Korean Patent Publication No. 10-2022-0052852 (Electrode powder for manufacturing dry electrode for secondary battery, method for manufacturing the same, method for manufacturing dry electrode using the same, dry electrode, secondary battery including the same, energy storage device and dry electrode manufacturing apparatus) was previously published.

[0007] The disclosed dry electrode manufacturing apparatus comprises: a stirrer for mixing a mixture of raw materials including an active substance, a conductive material and a binder; a kneader for kneading the mixture to produce a mixture block in order to fiberize the binder; a pulverizer for pulverizing the mixture block to form an electrode powder; a calender for forming the electrode powder into a mixed film; and a laminating roller for placing the mixed film on at least one side of a current collector and laminating it.

[0008] On the other hand, in the aforementioned mixed film, uniformity of thickness and density is crucial. Thickness and density should be uniform across all parts, rather than exhibiting partial variations. To achieve such uniformity, the precise metering of the electrode powder, i.e., the electrode material powder, is essential. However, conventional dry electrode manufacturing apparatuses have not employed techniques for precisely metering the electrode material powder. Summary of the Invention

[0009] Technical issues

[0010] The present invention was created to solve the above-mentioned problems, and its purpose is to provide a continuous quantitative supply device for electrode material powder. This device enables the manufacture of dry electrode films with uniform density and thickness by continuously and quantitatively supplying electrode material powder, and also enables the adjustment of the production speed of the electrode films.

[0011] Technical solution

[0012] As a technical solution for achieving the above-mentioned objectives, the electrode material powder continuous quantitative supply device of the present invention includes: a hopper for containing electrode material powder supplied from the outside and discharging the electrode material powder downward; a grooved roller horizontally disposed at the lower part of the hopper, having a plurality of powder conveying grooves extending in a circumferential direction formed on its outer peripheral surface; a first drive unit for rotating the grooved roller; a pressure roller disposed parallel to the grooved roller, for passing the electrode material powder between the pressure roller and the grooved roller and pressing the electrode material powder toward the inside of the powder conveying grooves; a scraper for separating the electrode material powder embedded in the powder conveying grooves of the grooved roller from the powder conveying grooves; and a calendering unit for passing the electrode material powder conveyed by the grooved roller through and calendering it.

[0013] A reversing roller is also provided on the side of the grooved roller. The reversing roller rotates forward or backward or remains stationary by means of the second drive unit while in contact with the outer peripheral surface of the grooved roller.

[0014] A guide block is installed at the lower part of the grooved roller and the reversing roller. The guide block is spaced at a specified distance from the outer peripheral surface of the grooved roller and guides the electrode material powder that has separated from the powder conveying groove to the calendering section.

[0015] Each powder conveying trough is a trough of a specified width and depth divided by annular protrusions. The scraper includes: a fixing plate, which is mounted on the lower side of the trough roller and provides support; and a plurality of insert scrapers, which are integral with the fixing plate, extend into the inner side of their respective powder conveying troughs, and separate the electrode material powder from the powder conveying troughs.

[0016] A first gear and a second gear are respectively installed on the roller shafts of the grooved roller and the pressure roller. The first gear and the second gear mesh with each other and make the circumferential speed of the grooved roller and the pressure roller the same.

[0017] The calendering section has a first calendering roll and a second calendering roll. The first calendering roll and the second calendering roll are parallel to each other and spaced at a predetermined distance, so that the electrode material powder transmitted by the grooved roller passes through and is pressurized to reduce the thickness of the electrode material powder.

[0018] In addition, a vibrator is provided on the outer wall of the hopper, which applies vibration to the hopper to guide the discharge of electrode material powder inside the hopper.

[0019] The effects of the invention

[0020] The electrode material powder continuous metering supply apparatus of the present invention, configured as described above, enables the manufacture of dry electrode films with uniform density and thickness by continuously and metering the electrode material powder. Furthermore, since the supply amount of electrode material powder is easily adjustable, the production speed of the electrode film can be easily adjusted.

[0021] Furthermore, since a specified amount of electrode material powder can be continuously supplied along the length direction, it is possible to manufacture an electrode film with a constant thickness along the length direction. Attached Figure Description

[0022] Figure 1 and Figure 2 This is a perspective view of a continuous quantitative supply device for electrode material powder according to an embodiment of the present invention.

[0023] Figure 3 This is a diagram illustrating the overall structure and operation of a continuous quantitative supply device for electrode material powder according to an embodiment of the present invention.

[0024] Figure 4 It is shown Figure 3 A diagram showing the structure of a hopper.

[0025] Figure 5 It is used for explanation Figure 4 A diagram illustrating the movement of the hopper.

[0026] Figure 6 and Figure 7 It is shown Figure 3 A diagram showing the composition of the grooved roller, pressure roller, and reverse roller.

[0027] Figure 8 It is Figure 7 The image shows an exploded perspective view of the support block and scraper after disassembly.

[0028] Figure 9 It is shown by Figure 8 A diagram showing the appearance of electrode material powder compressed by a pressure roller. Detailed Implementation

[0029] Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

[0030] Figure 1 and Figure 2 This is a perspective view of an electrode material powder continuous quantitative supply device according to an embodiment of the present invention. Figure 3 This is a diagram used to illustrate the overall structure and operation of the quantitative supply device. Furthermore, Figure 4 It is shown Figure 3 A diagram showing the structure of a hopper. Figure 5 It is used for explanation Figure 4 A diagram illustrating the movement of the hopper.

[0031] in addition, Figure 6 and Figure 7 It is shown Figure 3 A diagram showing the composition of the grooved roller, pressure roller, and reversing roller. Figure 8 It is Figure 7 The exploded perspective view of the support block and scraper shown is shown below. Figure 9 It is shown by Figure 8 A diagram showing the appearance of electrode material powder compressed by a pressure roller.

[0032] As shown in the figure, the electrode material powder continuous quantitative supply device 10 of this embodiment includes a support structure 11, a hopper 15, a groove roller 21, a first drive unit 17, a pressure roller 25, a reverse roller 29, a second drive unit 19, a scraper 33, a calendering unit 50, and a control unit 47.

[0033] The support structure 11 includes two vertical fixing plates 11a with a specified thickness. The vertical fixing plates 11a are arranged parallel to each other and spaced apart, and a hopper 15, a groove roller 21, a pressure roller 25, and a reversing roller 29 are accommodated between them. The vertical fixing plates 11a maintain the spacing by the hopper 15 and the spacing maintaining rod 11c.

[0034] The hopper 15 contains electrode material powder 100 supplied from the outside and discharges it downwards. A groove roller 21 and a pressure roller 25 are provided at the lower part of the hopper 15. The groove roller 21 and the pressure roller 25 rotate in opposite directions, causing the electrode material powder 100 to pass between them.

[0035] The space 15a of the hopper 15 is formed by two vertical fixed plates 11a and two inclined plates 15b. The inclined plates 15b are plate-shaped components with an included angle of about 60 degrees and correspond to each other. Thus, the hopper 15 is composed of a portion of the two vertical fixed plates 11a and the inclined plates 15b.

[0036] Furthermore, an observation window 13 is provided in the portion of the vertical fixing plate 11a on one side that covers the space 15a. The observation window 13 is a transparent window that displays the remaining amount of electrode material powder 100 contained in the space 15a to the outside. The operator can check the remaining amount of electrode material powder 100 at any time through the observation window 13.

[0037] Additionally, one or more level sensors 43 are installed on the inclined plate 15b inside the hopper and on the vertical fixed plate 11a that constitutes the hopper and forms the space 15a. The level sensors 43 sense the remaining amount of electrode material powder 100 and transmit the sensing information to the control unit 47 in real time. The control unit 47 receives the real-time transmitted remaining amount information as feedback and transmits a signal to the powder supply unit (not shown) to ensure that the electrode material powder 100 is supplied, so that a constant amount of electrode material powder 100 is always maintained in the hopper 15. At this time, the operator can also wirelessly access the control unit 47 via a smartphone to confirm the real-time remaining amount information of the electrode material powder 100 provided by the control unit 47.

[0038] Furthermore, vibrators 41 are installed on the outer sides of the inclined plates 15b on both sides. These vibrators 41 apply vibration to the hopper 15 to guide the discharge of the electrode material powder 100 within the hopper. The vibrators 41 apply vibrational energy to the hopper 15 to make the electrode material powder 100 easier to slide off. For example, when the electrode material powder 100 clumps together and is difficult to fall, vibration is applied to guide its discharge. The vibrators 41 are also controlled by a control unit 47.

[0039] A pressurizing unit 45 is provided at the upper part of the hopper 15. The pressurizing unit 45 is supported on the upper ends of the inclined plate 15b and the vertical fixed plate 11a, and seals the space 15a. The pressurizing unit 45 regulates the pressure inside the space 15a so that the electrode material powder 100 is discharged at a constant pressure. For this purpose, the pressurizing unit 45 seals the space 15a. Of course, in order to supply the electrode material powder 100, the pressurizing unit 45 can be opened from the hopper 15.

[0040] When air is forced into the space 15a while the space 15a is sealed by the pressurization unit 45, the pressure inside the space 15a increases and acts as a force that pushes the electrode material powder 100 downward.

[0041] The electrode material powder 100 is pressed downwards under the action of gravity. When a larger amount of electrode material powder 100 is filled into the space 15a, the total weight is heavier (compared to when a smaller amount of powder is filled), resulting in relatively stronger pressure on the groove roller 21 and the pressure roller 25. There is inevitably a pressure difference between the force applied when the amount of electrode material powder 100 is smaller and the force applied when the amount of electrode material powder 100 is relatively larger. The stronger the force applied to the groove roller and the pressure roller, the greater the density of the electrode material powder discharged through the powder conveying trough 21a.

[0042] The pressurizing unit 45 serves to reduce the aforementioned pressure difference. Specifically, as the remaining amount of electrode material powder 100 within the space 15a gradually decreases, the pressure inside the space 15a increases accordingly. When the pressure in the space increases, the increased pressure pushes the electrode material powder 100 downwards, thus maintaining a constant unit volume density of the finally discharged electrode material powder. The pressurizing unit 45 is controlled by the control unit 47.

[0043] The pressurizing unit 45 can apply pressure to the electrode material powder in a non-contact manner, without directly contacting the powder. In this case, the pressurizing unit 45 can control the pressure of the electrode material powder by supplying air at a predetermined pressure towards the hopper. When pressure is applied to the electrode material powder in a non-contact manner, agglomeration of the powder can be prevented. Alternatively, the pressurizing unit can also apply pressure by directly contacting the electrode material powder.

[0044] On the other hand, such as Figure 6 As shown, the grooved roller 21 is a component horizontally disposed at the lower part of the hopper 15. A roller shaft 21e is provided at the central axis of the grooved roller 21. The roller shaft 21e is rotatably supported on vertical fixed plates 11a on both sides.

[0045] Additionally, a powder conveying groove 21a and an annular protrusion 21b are formed on the outer circumferential surface of the grooved roller 21. The powder conveying groove 21a is a groove with a specified width and depth, extending along the circumferential direction of the grooved roller 21. The powder conveying groove 21a is formed by machining the outer circumferential surface of a cylindrical component with a specified diameter.

[0046] Furthermore, the annular protrusion 21b is an annular protrusion remaining on the side of the powder conveying trough 21a. The annular protrusion 21b is a portion that is automatically generated by forming the powder conveying trough 21a and divides adjacent powder conveying troughs 21a.

[0047] Additionally, a first gear 23 is fixed at one end of the roller 21e, and a driven pulley is fixed at the other end on the opposite side. Figure 2 (17f). Related explanations will be provided later.

[0048] The first drive unit 17 serves to rotate the grooved roller 21. The first drive unit 17 includes a fixed bracket 17d, a servo motor 17a, a reducer 17b, a drive pulley 17e, a belt 17g, and a driven pulley 17f.

[0049] The fixed bracket 17d is a support structure fixed to the vertical fixed plate 11a on one side and supports the reducer 17b. The reducer 17b, in a state of engagement with the fixed bracket 17d, receives the rotational force of the servo motor 17a, thereby causing the drive pulley 17e to rotate.

[0050] Furthermore, the drive pulley 17e is connected to the driven pulley 17f via a belt 17g. The belt 17g is a synchronous belt, which transmits the rotational force of the drive pulley 17e to the driven pulley 17f. As the driven pulley 17f rotates, the grooved roller 21 naturally rotates as well.

[0051] The pressure roller 25 is arranged parallel to the groove roller 21. While the electrode material powder 100 passes between the pressure roller and the groove roller, the electrode material powder is pressed towards the inside of the powder conveying groove 21a.

[0052] A roller shaft 25b is provided at the central axis of the pressure roller 25. The roller shaft 25b is rotatably supported on vertical fixed plates 11a on both sides. In addition, a second gear 27 is installed at one end of the roller shaft 25b. The second gear 27 meshes with the first gear 23. Thus, since the grooved roller 21 and the pressure roller 25 are connected by the first gear 23 and the second gear 27, the grooved roller 21 and the pressure roller 25 rotate simultaneously in opposite directions at the same circumferential speed. Since the grooved roller 21 and the pressure roller 25 rotate in the directions of arrow a and arrow b, the electrode material powder 100 is guided to the lower part after flowing between the grooved roller 21 and the pressure roller 25.

[0053] like Figure 9 As shown, the pressure roller 25 is in line contact with the grooved roller 21. That is, the outer peripheral surface of the pressure roller 25 is in contact with the outer peripheral surface of the annular protrusion 21b. Furthermore, in the electrode material powder 100 introduced between the pressure roller 25 and the grooved roller 21, the electrode material powder 100 located at the periphery of the powder conveying groove 21a is pressed by the pressure roller 25 and pressurized in the direction of arrow F. The electrode material powder 100 is compacted and firmly clumped together towards the inner side of the powder conveying groove 21a.

[0054] A reversing roller 29 is disposed on the side of the grooved roller 21 and is operated by the second drive unit 19. Like the pressure roller 25, the reversing roller 29 is a flat roller that contacts the outer peripheral surface of the grooved roller 21. The roller shaft 29a of the reversing roller 29 is rotatably supported on the vertical fixed plate 11a. Furthermore, a driven pulley 19f is mounted on one end of the roller shaft 29a. The driven pulley 19f receives rotational force from the second drive unit 19 and rotates.

[0055] The second drive unit 19 includes a fixed bracket 19d, a servo motor 19a, a reducer 19b, a drive pulley 19e, a belt 19g, and a driven pulley 19f.

[0056] The fixed bracket 19d is a support structure fixed to the vertical fixed plate 11a on one side and supports the reducer 19b. The reducer 19b, in conjunction with the fixed bracket 19d, receives the rotational force of the servo motor 19a, causing the drive pulley 19e to rotate. The drive pulley 19e is connected to the driven pulley 19f via a belt 19g. The belt 17g is a synchronous belt, transmitting the rotational force of the drive pulley 19e to the driven pulley 19f. As the driven pulley 17f rotates, the reverse roller 29 rotates naturally.

[0057] In particular, the servo motor 19a is capable of both forward and reverse rotation, and can also maintain a stationary state. Therefore, the reverse roller 29 can move along... Figure 3 It can rotate in the direction of arrow e or its opposite direction and can remain stationary. The speed ratio of the reverse roller 29 to the groove roller 21 can be adjusted within a virtually unlimited range.

[0058] The reversing roller 29 supports the electrode material powder 100 contained in the powder conveying trough 21a. For example, during the process of the electrode material powder 100 moving from the pressure roller 25 to the reversing roller 29, the electrode material powder 100 that has been lifted from the powder conveying trough 21a is pressurized again.

[0059] According to the embodiment, an annular protrusion (not shown) of the electrode material powder 100 can also be applied (into the inside of the powder conveying groove 21a) to the outer peripheral surface of the reverse roller 29 to press and compact it.

[0060] On the other hand, a guide block 31 is installed at the lower part of the contact area between the grooved roller 21 and the reverse roller 29. The guide block 31 is a block-shaped component made of Teflon, and its two ends are fixed to the vertical fixing plate 11a.

[0061] Guide block 31 receives the electrode material powder 100 that has passed through the grooved roller 21 and the reverse roller 29 and separated from the powder conveying groove 21a, and directs it towards... Figure 4 The arrow 's' direction guides the electrode material powder. The electrode material powder 100, which has detached from the powder conveying trough 21a, slides downward along the sliding surface 31b and reaches the upper part of the first calendering roller 51.

[0062] The guide block 31 has an upper cutting edge 31a and a sliding surface 31b. The upper cutting edge 31a extends to the portion where the grooved roller 21 contacts the reversing roller 29, and prevents the electrode material powder 100 that has detached from the powder conveying groove 21a from escaping toward the reversing roller 29. That is, it prevents it from escaping along the... Figure 4 The arrow 't' extends outwards.

[0063] The sliding surface 31b is a surface spaced at a predetermined distance from the outer peripheral surface of the grooved roller 21. The curvature of the outer peripheral surface of the grooved roller 21 is the same as the curvature of the sliding surface 31b. Therefore, the distance between the outer peripheral surface of the annular protrusion 21b and the sliding surface 31b is the same.

[0064] As mentioned above, the sliding surface 31b guides the electrode material powder that has detached from the powder conveying trough 21a in the direction of arrow s and directs it toward the first calendering roll 51 of the calendering section 50. However, the electrode material powder 100 that has not detached from the powder conveying trough 21a does not contact the guide block 31, but moves to the scraper 33 and is separated from the powder conveying trough 21a by the scraper 33.

[0065] The scraper 33 serves to separate the electrode material powder 100 embedded in the powder conveying groove 21a of the groove roller 21 from the powder conveying groove 21a. The scraper 33 includes a fixed plate 33e and a plurality of insert scraper blades 33a.

[0066] The fixing plate 33e is a plate-shaped component with a specified thickness, supporting the mounting plate 34a and the connecting plate 34b. The mounting plate 34a is a quadrilateral plate with a specified thickness, with both ends fixed to the vertical fixing plates 11a on both sides. Furthermore, the connecting plate 34b is a component connecting the mounting plate 34a and the scraper 33. The connecting plate 34b is also bolted to both the scraper 33 and the mounting plate 34a.

[0067] The fixing plate 33e is fixed to the lower side of the groove roller 21 and has the aforementioned insert scraper 33a at its front end. The insert scraper 33a is integrally formed with the fixing plate 33e and extends into the inside of each powder conveying groove 21a to separate the electrode material powder 100 from the powder conveying groove 21a. The front end of the insert scraper 33a contacts the bottom surface of the powder conveying groove 21a.

[0068] Simultaneously, a raised slit 33d is formed between each inserted scraper 33a. For example... Figure 7 As shown in the magnified view, the annular protrusion 21b is accommodated in the protrusion receiving slit 33d. Due to the formation of the protrusion receiving slit 33d, the inserted scraper 33a can contact the bottom of the powder receiving groove 21a.

[0069] On the other hand, the calendering section 50 has the function of calendering the electrode material powder 100 through and pressing it to form it into a thinner shape. The calendering section 50 includes a first calendering roll 51 and a second calendering roll 53. The first calendering roll 51 and the second calendering roll 53 are driven independently by their respective roll drive sections 51a and 53a. The rotational speeds of the first calendering roll 51 and the second calendering roll 53 are controlled independently.

[0070] The first calendering roll 51 and the second calendering roll 53 are parallel to each other and spaced at a predetermined distance. The rotation directions of the first calendering roll 51 and the second calendering roll 53 are opposite to each other. The electrode material powder 100, which is passed through the grooved roll 21, passes through the first calendering roll 51 and the second calendering roll 53, and its thickness is reduced. The electrode material powder, which is formed into a sheet shape when passing through the first calendering roll 51 and the second calendering roll 53, is further compressed and processed into a thinner sheet in subsequent processes.

[0071] The ratio of the rotational speeds of the first calendering roll 51 and the second calendering roll 55 can be combined in various ways. In this case, when the speed of the first calendering roll 51 is set to 1, it is preferable to adjust the speed of the second calendering roll 55 to 1 or higher, for example, to a speed of 1.2 to 2. If the speed of the second calendering roll is faster than that of the first calendering roll, the electrode material powder 100 can adhere to the second calendering roll and move along the second calendering roll when it separates from the first calendering roll.

[0072] The first and second calendering rolls can each be made of special steel with a chromium-plated surface.

[0073] The present invention has been described in detail above through specific embodiments, but the present invention is not limited to the above embodiments. Within the scope of the technical concept of the present invention, those skilled in the art can make various modifications.

[0074] Industrial availability

[0075] Because the continuous and quantitative supply of secondary battery electrode material powder enables the manufacture of dry electrode films with uniform density and thickness, it can be used in industry.

Claims

1. A device for continuous quantitative supply of electrode material powder, characterized in that, include: The hopper contains electrode material powder supplied from the outside and discharges the electrode material powder downwards; The grooved roller is horizontally positioned at the bottom of the hopper and has multiple powder conveying grooves extending in the circumferential direction on its outer circumferential surface. The first drive unit rotates the grooved roller; The pressure roller is arranged parallel to the groove roller, so that the electrode material powder passes between the pressure roller and the groove roller and presses the electrode material powder toward the inside of the powder conveying groove. A scraper, which separates the electrode material powder embedded in the powder conveying groove of the grooved roller from the powder conveying groove; and The calendering section is where electrode material powder, conveyed by grooved rollers, passes through and is calendered.

2. The continuous quantitative supply device for electrode material powder according to claim 1, characterized in that, A reversing roller is also provided on the side of the grooved roller. The reversing roller rotates forward or backward or remains stationary by means of the second drive unit while in contact with the outer peripheral surface of the grooved roller.

3. The continuous quantitative supply device for electrode material powder according to claim 2, characterized in that, A guide block is installed at the lower part of the grooved roller and the reversing roller. The guide block is spaced at a specified distance from the outer peripheral surface of the grooved roller and guides the electrode material powder that has separated from the powder conveying groove to the calendering section.

4. The continuous quantitative supply device for electrode material powder according to claim 1, characterized in that, Each powder conveying trough is a trough of a specified width and depth, divided by annular protrusions. The scraper has the following features: A fixing plate is installed on the lower side of the grooved roller and provides support. as well as Multiple insert scrapers, which are integrally formed with the fixing plate, extend into the inner side of their respective powder conveying tanks and separate the electrode material powder from the powder conveying tanks.

5. The continuous quantitative supply device for electrode material powder according to claim 1, characterized in that, A first gear and a second gear are respectively installed on the roller shafts of the grooved roller and the pressure roller. The first gear and the second gear mesh with each other and make the circumferential speed of the grooved roller and the pressure roller the same.

6. The continuous quantitative supply device for electrode material powder according to claim 1, characterized in that, The calendering section has a first calendering roll and a second calendering roll. The first calendering roll and the second calendering roll are parallel to each other and spaced at a predetermined distance, so that the electrode material powder transmitted by the grooved roller passes through and is pressurized to reduce the thickness of the electrode material powder.

7. The continuous quantitative supply device for electrode material powder according to claim 6, characterized in that, The second calendering roll rotates at a speed higher than that of the first calendering roll, causing the sheet-like electrode material powder passing through the first and second calendering rolls to adhere to the second calendering roll and move.

8. The continuous quantitative supply device for electrode material powder according to claim 1, characterized in that, The hopper is also equipped with a vibrator, which applies vibration to the hopper to guide the discharge of electrode material powder inside the hopper.

9. The continuous quantitative supply device for electrode material powder according to claim 1, characterized in that, Also includes: A pressurizing unit applies a constant pressure to the electrode material powder contained in the hopper.

10. The continuous quantitative supply device for electrode material powder according to claim 1, characterized in that, The hopper is composed of an inclined plate and a vertical fixed plate having a funnel-shaped downward inclination, and a level sensor for sensing the height of the electrode material powder filled in the hopper is disposed on at least one of the inclined plate and the vertical fixed plate inside the hopper.

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