Slurry backflow device

Abstract

The invention provides a slurry backflow device, and belongs to the technical field of battery production. The slurry backflow device provided by the invention comprises a die head, a regulating valve, a slurry recovery tank, a slurry recovery tank, a backflow pump, a slurry extrusion tank, a slurry stirring tank, a slurry tank and a control part, wherein a flow inlet, a coating opening and a backflow opening which are communicated with one another are formed in the die head; the regulating valve is connected with the reflux inlet; the slurry recovery tank is connected with the regulating valve and is used for collecting slurry flowing out of the reflux inlet; the reflux pump is connected with the slurry recovery tank; the slurry extrusion tank is provided with a feed port and a discharge port which can be opened and closed, and the feed port of the slurry extrusion tank is connected with the reflux pump; the slurry stirring tank is provided with a feed port and a discharge port, and the feed port of the slurry stirring tank is connected with the discharge port of the slurry extrusion tank; the slurry tank is connected with a discharge port of the slurry stirring tank; and the control part is electrically connected with the regulating valve, the reflux pump, the slurry extrusion tank and the slurry stirring tank. According to the invention, the coating operation quality and the slurry utilization rate are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production, and more specifically, relates to a slurry reflux device. Background Art

[0002] The battery cell of a lithium battery includes pole pieces, which are coated with slurry. The pole pieces are divided into positive pole pieces and negative pole pieces. The positive pole pieces are coated with positive electrode slurry, and the negative pole pieces are coated with negative electrode slurry. In the actual production process of batteries, the slurry used for coating operations is usually prepared by a batching device and stored in a slurry tank. The coating device includes a die head, a feed pump and a material conveying mechanism, and the slurry tank is connected to the feed pump and the die head. During the coating operation, the feed pump transports the slurry in the feed tank to the die head through a conveying pipe, and the die head coats the slurry on the pole piece conveyed by the material conveying mechanism. In the process of feeding the die head with existing coating devices, it is often difficult to accurately control the feeding amount, resulting in too much or too little coating on the die head and uneven coating, which affects the quality of the coating operation. Summary of the invention

[0003] The purpose of the present invention is to provide a slurry reflux device to solve the technical problem in the prior art that it is difficult to accurately control the slurry supply amount during the feeding process of the coating device to the die head, resulting in excessive or insufficient coating on the die head, uneven coating, and affecting the quality of the coating operation.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a slurry reflux device, including a die head, a regulating valve, a slurry recovery tank, a slurry recovery tank, a reflux pump, a slurry extrusion tank, a slurry stirring tank, a slurry tank and a control unit, the die head is provided with an inlet, a coating port and a reflux port which are interconnected, and the slurry is coated on the electrode through the coating port; the regulating valve is connected to the reflux port; the slurry recovery tank is connected to the regulating valve, and is used to collect the slurry flowing out of the reflux port; the reflux pump is connected to the slurry recovery tank; the slurry extrusion tank is provided with an openable and closable inlet and outlet, the inlet of the slurry extrusion tank is connected to the reflux pump, and the slurry extrusion tank is used to extrude and filter the slurry; the slurry stirring tank is provided with a feed inlet and a discharge port, the feed inlet of the slurry stirring tank is connected to the discharge port of the slurry extrusion tank, and the slurry stirring tank is used to stir the slurry; the slurry tank is connected to the discharge port of the slurry stirring tank; the control unit is electrically connected to the regulating valve, the reflux pump, the slurry extrusion tank and the slurry stirring tank.

[0005] In combination with the above technical scheme, in a possible implementation method, the slurry extrusion tank includes an extrusion tank body, an extrusion plate, and a hydraulic cylinder. The extrusion tank body is a hollow structure, and the inlet and outlet are arranged on the extrusion tank body, and a filter plate is arranged above the outlet; the extrusion plate is arranged in the extrusion tank body, and the extrusion plate is slidingly and sealingly connected to the extrusion tank body, and the extrusion plate can move along the axial direction of the extrusion tank body; the hydraulic cylinder is arranged in the extrusion tank body, connected to the extrusion plate, and is used to push the extrusion plate to extrude the slurry and make the slurry flow out through the filter plate.

[0006] In combination with the above technical solution, in a possible implementation method, the extrusion tank body is cylindrical, the extrusion plate is a circular plate, and a first motor is also provided on the extrusion tank body. The driving end of the first motor extends into the extrusion tank body and is connected to the hydraulic cylinder. A number of grinding heads are provided at the contact end of the extrusion plate and the slurry. The first motor is used to drive the extrusion plate to rotate and grind the slurry particles on the filter plate through the grinding heads.

[0007] In combination with the above technical solution, in a possible implementation, an annular scraper is provided on the extrusion plate, the annular scraper is in contact with the inner wall of the extrusion tank body, and the annular scraper is used to scrape off the slurry adhering to the inner wall of the extrusion tank body.

[0008] In combination with the above technical scheme, in a possible implementation method, a slurry stirring tank includes a stirring tank body, an internal stirring structure, an external stirring structure, and a rotary drive structure. A feed port and a discharge port are arranged on the stirring tank body, the discharge port is located at the lower part of the stirring tank body, and the slurry tank is located below the discharge port; the internal stirring structure is arranged in the stirring tank body and is rotatably connected to the stirring tank body; the external stirring structure is arranged in the stirring tank body and is rotatably connected to the stirring tank body, the internal stirring structure is sleeved in the external stirring structure, the internal stirring structure and the external stirring structure rotate in opposite directions, and the internal stirring structure and the external stirring structure are used to stir the slurry in the stirring tank body; the rotary drive structure is connected to the stirring tank body, and the rotary drive structure is transmission-connected to the internal stirring structure and the external stirring structure, and is used to drive the internal stirring structure and the external stirring structure to rotate in the opposite direction.

[0009] In combination with the above technical scheme, in a possible implementation method, the internal stirring structure includes a rotating shaft, a connecting seat, a fixed rod, a fixed frame, a fixed gear, a movable gear, and a first stirring rod. The rotating shaft is rotatably connected to the stirring tank body, the rotating shaft is a hollow structure, and the upper end of the rotating shaft extends out of the stirring tank body, and the rotating drive structure can drive the rotating shaft to rotate; the connecting seat is connected to the rotating shaft, and the connecting seat is located below the rotating shaft. A through hole is provided on the connecting seat, and the through hole is coaxial with the inner hole of the rotating shaft; the fixed rod is passed through the rotating shaft, the upper end of the fixed rod extends out of the upper end of the rotating shaft, and the lower end of the fixed rod extends out of the through hole of the connecting seat; the fixed frame is arranged outside the stirring tank body and is connected to the upper end of the fixed rod; the fixed gear is connected to the lower end of the fixed rod; a plurality of movable gears are rotatably connected to the connecting seat, the movable gear is meshed with the fixed gear, and the plurality of movable gears are arranged around the fixed gear and can rotate around the fixed gear; each movable gear is coaxially connected to a first stirring rod, and the first stirring rod is provided with a first stirring blade.

[0010] In combination with the above technical solution, in a possible implementation method, the external stirring structure includes a plurality of arc-shaped scrapers and a second stirring rod. The plurality of arc-shaped scrapers are connected to the stirring tank body. The arc-shaped scrapers can rotate around the axis of the stirring tank body. The arc-shaped scrapers are in contact with the inner wall of the stirring tank body and are used to scrape off the slurry stuck to the inner wall of the stirring tank body. The rotary drive structure can drive the arc-shaped scrapers to rotate; the second stirring rod is arranged on the arc-shaped inner wall of the arc-shaped scraper, and a second stirring rod is arranged on each arc-shaped scraper, and a second stirring blade is arranged on the second stirring rod.

[0011] In combination with the above technical solution, in a possible implementation method, the rotary drive structure includes an internal gear, a follower gear, a driving gear, and a second motor. The internal gear is a ring structure, the internal gear is rotatably connected to the stirring tank body, and a plurality of arc-shaped scrapers are connected to the internal gear; the follower gear is connected to the lower end of the rotating shaft, a through hole is provided in the middle of the follower gear, the through hole is coaxial with the through hole, the connecting seat is connected to the follower gear, and the lower end of the fixing rod passes through the through hole and the through hole in turn and extends out of the rotating shaft; the driving gear is rotatably connected to the stirring tank body, and the driving gear is meshed with the internal gear and the follower gear; the second motor is connected to the driving gear, and is used to drive the driving gear to rotate.

[0012] In combination with the above technical solution, in a possible implementation, the first stirring blade is a spiral blade structure.

[0013] In combination with the above technical solution, in a possible implementation, the second stirring rod includes a horizontal rod and a vertical rod connected in sequence, the horizontal rods at both ends are connected to the arc scraper, and at least one second stirring blade is arranged on each vertical rod, and the second stirring blade is a disc structure.

[0014] The beneficial effect of the slurry reflux device provided by the present invention is that: compared with the prior art, the present invention adds a reflux port in the die head, the reflux port is interconnected with the inlet and coating port of the die head itself, and the reflux port is connected to the slurry recovery tank through a regulating valve. When the feed pump feeds the slurry in the slurry tank into the inlet of the die head, and the feed is too much, part of the slurry can flow back into the slurry recovery tank from the reflux port. By controlling the opening size of the regulating valve, the flow rate of the slurry flowing out of the reflux port can be controlled, thereby ensuring that the slurry can be more evenly coated on the electrode. At the same time, the present invention adds a reflux pump, a slurry extrusion tank, and a slurry stirring tank. The reflux port, the regulating valve, the slurry recovery tank, the slurry extrusion tank, the slurry stirring tank and the slurry tank are connected in sequence to form a reflux path for the slurry. Because some particles may gel in the process of the slurry flowing back into the slurry recovery tank, if it flows back directly to the slurry tank, it will affect the quality of the slurry in the slurry tank. In the slurry reflux process of the present invention, the slurry is first squeezed and filtered through the slurry squeezing tank to filter out larger particles in the slurry, and then the slurry is stirred through the slurry stirring tank to ensure that the slurry is evenly mixed, and finally flows back to the slurry tank. The slurry reflux device of the present invention improves the coating operation quality while ensuring the slurry reflux quality, avoiding slurry waste, and improving the slurry utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A slurry reflux flow chart provided for an embodiment of the present invention; Figure 2 A front view of a slurry extrusion tank used in an embodiment of the present invention; Figure 3 For along Figure 2 AA section view in; Figure 4 A schematic diagram of the internal structure of a slurry extrusion tank used in an embodiment of the present invention; Figure 5 A top view of a slurry stirring tank used in an embodiment of the present invention; Figure 6 For along Figure 5 BB section view in; Figure 7 This is a schematic diagram of the internal structure of a slurry stirring tank used in an embodiment of the present invention; Figure 8A schematic diagram of the internal structure of a slurry stirring tank from another angle used in an embodiment of the present invention; Fig. 9 This is a schematic diagram of the internal structure of the slurry stirring tank from a third angle used in an embodiment of the present invention.

[0017] Among them, the reference numerals in the figures are as follows: 1. Slurry recovery tank; 2. Reflux pump; 3. Slurry extrusion tank; 4. Slurry stirring tank; 5. Die head; 6. Regulating valve; 7. Slurry tank; 8. Feed pump; 301. Extrusion tank body; 302. First motor; 303. Hydraulic cylinder; 304. Grinding head; 305. Extrusion plate; 306. Filter plate; 307. Annular scraper; 401. Stirring tank body; 402. Fixed frame; 403. Second motor; 404. Fixed rod; 405. Rotating shaft; 406. Internal gear; 407. Fixed gear; 408. Moving gear; 409. Arc scraper; 410. First stirring blade; 411. Second stirring rod; 412. Second stirring blade; 413. Driving gear; 414. Follower gear; 415. Connecting seat; 416. First stirring rod; 501. Inlet; 502. Reflux port; 503. Coating port. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0019] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0020] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0021] The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. The directions or positional relationships indicated by the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0024] The slurry reflux device provided by the present invention is now described.

[0025] like Figure 1As shown, the first embodiment of the present invention provides a slurry reflux device including a die head 5, a regulating valve 6, a slurry recovery tank 1, a slurry recovery tank 1, a reflux pump 2, a slurry extrusion tank 3, a slurry stirring tank 4, a slurry tank 7 and a control unit, wherein the die head 5 is provided with an inlet 501, a coating port 503 and a reflux port 502 which are interconnected, and the slurry is coated on the electrode through the coating port 503; the regulating valve 6 is connected to the reflux port 502; the slurry recovery tank 1 is connected to the regulating valve 6 for collecting the slurry flowing out of the reflux port 502; the reflux port 503 is connected to the slurry recovery tank 1, and ... The pump 2 is connected to the slurry recovery tank 1; the slurry extrusion tank 3 is provided with an openable and closable inlet and outlet, the inlet of the slurry extrusion tank 3 is connected to the reflux pump 2, and the slurry extrusion tank 3 is used to extrude and filter the slurry; the slurry stirring tank 4 is provided with a feed inlet and a discharge port, the feed inlet of the slurry stirring tank 4 is connected to the outlet of the slurry extrusion tank 3, and the slurry stirring tank 4 is used to stir the slurry; the slurry tank 7 is connected to the discharge port of the slurry stirring tank 4; the control unit is electrically connected to the regulating valve 6, the reflux pump 2, the slurry extrusion tank 3, and the slurry stirring tank 4.

[0026] The slurry reflux device provided in this embodiment is compared with the prior art. The present invention adds a reflux port 502 in the die head 5. The reflux port 502 is interconnected with the inlet port 501 and the coating port 503 of the die head 5 itself. The reflux port 502 is connected to the slurry recovery tank 1 through the regulating valve 6. When the feed pump 8 feeds the slurry in the slurry tank 7 into the inlet port 501 of the die head 5 and the feed is too much, part of the slurry can flow back into the slurry recovery tank 1 from the reflux port 502. By controlling the opening size of the regulating valve 6, the flow rate of the slurry flowing out of the reflux port 502 can be controlled, thereby ensuring that the slurry can be more evenly coated on the electrode through the coating port 503. At the same time, the present invention adds a reflux pump 2, a slurry extrusion tank 3, and a slurry stirring tank 4. The reflux port 502, the regulating valve 6, the slurry recovery tank 1, the slurry extrusion tank 3, the slurry stirring tank 4 and the slurry tank 7 are connected in sequence to form a reflux path for the slurry. Since some particles may gel during the slurry reflux into the slurry recovery tank 1, if the slurry is directly refluxed to the slurry tank 7, the quality of the slurry in the slurry tank 7 will be affected. In the slurry reflux process of the present invention, the slurry is first squeezed and filtered through the slurry squeezing tank 3 to filter out larger particles in the slurry, and then the slurry is stirred through the slurry stirring tank 4 to ensure that the slurry is evenly mixed, and finally flows back to the slurry tank 7. The slurry reflux device of the present invention improves the coating operation quality while ensuring the slurry reflux quality, avoiding slurry waste and improving slurry utilization.

[0027] In this embodiment, a liquid level sensor can be provided in the slurry recovery tank 1, and the liquid level sensor is electrically connected to the control unit. The feed pump 8 feeds the slurry from the slurry tank 7 to the inlet 501 of the die head 5, and the slurry flows from the inlet 501 to the coating port 503 for coating, and the excess slurry overflows from the reflux port 502 and flows into the slurry recovery tank 1. When the slurry in the slurry recovery tank 1 accumulates to a certain liquid level, the liquid level sensor transmits a signal to the control unit, and the control unit controls the reflux pump 2, the slurry extrusion tank 3, and the slurry stirring tank 4 to start operation, and the slurry in the slurry recovery tank 1 is squeezed and filtered by the slurry extrusion tank 3 and stirred by the slurry stirring tank 4 and then flows back to the slurry tank 7.

[0028] In this embodiment, the slurry can also be refluxed once at a certain time interval, so that the slurry in the slurry collection tank can flow back to the slurry tank 7.

[0029] like Figures 2 to 4 As shown, a specific embodiment provided by the present invention on the basis of the first embodiment is as follows: the slurry extrusion tank 3 includes an extrusion tank body 301, an extrusion plate 305, and a hydraulic cylinder 303. The extrusion tank body 301 is a hollow structure, and an inlet and an outlet are arranged on the extrusion tank body 301, and a filter plate 306 is arranged above the outlet; the extrusion plate 305 is arranged in the extrusion tank body 301, and the extrusion plate 305 is slidingly and sealingly connected to the extrusion tank body 301, and the extrusion plate 305 can move along the axial direction of the extrusion tank body 301; the hydraulic cylinder 303 is arranged in the extrusion tank body 301, and is connected to the extrusion plate 305, and is used to push the extrusion plate 305 to extrude the slurry and make the slurry flow out through the filter plate 306.

[0030] In this embodiment, when reflux is required, the feed inlet of the extrusion tank body 301 is opened, the discharge port is closed, and the reflux pump 2 is activated to transport the slurry in the slurry recovery tank 1 into the extrusion tank body 301. Then the reflux pump 2 stops operating, the feed inlet of the extrusion tank body 301 is closed, the discharge port is opened, and the hydraulic cylinder 303 pushes the extrusion plate 305 downward to extrude the slurry. Under the action of the extrusion force, the slurry passes through the filter plate 306 and flows from the discharge port into the slurry stirring tank 4 for stirring.

[0031] In this embodiment, an inlet and an outlet are provided on the extrusion tank body 301 of the slurry extrusion tank 3. The inlet is provided with a first switch valve, and the outlet is provided with a second switch valve. The first switch valve and the second switch valve are electrically connected to the control unit, and the control unit controls the opening and closing of the inlet and the outlet respectively through the first switch valve and the second switch valve.

[0032] like Figures 2 to 4As shown, the present invention provides a specific implementation method based on the above implementation method as follows: the extrusion tank body 301 is cylindrical, the extrusion plate 305 is a circular plate, the extrusion tank body 301 is also provided with a first motor 302, the driving end of the first motor 302 extends into the extrusion tank body 301 and is connected to the hydraulic cylinder 303, and the extrusion plate 305 is provided with a plurality of grinding heads 304 at the contact end with the slurry, and the first motor 302 is used to drive the extrusion plate 305 to rotate and grind the slurry particles on the filter plate 306 through the grinding heads 304.

[0033] In this embodiment, the reflux pump 2 starts to work and drives the slurry to reflux only when the slurry accumulates to a certain liquid level or is stored for a certain period of time in the slurry recovery tank 1. During the accumulation process, larger particles or bubbles may appear in the slurry. The bubbles in the slurry can be discharged by squeezing, and the particles in the slurry can be retained in the slurry squeezing tank 3 by filtering. In this embodiment, a first motor 302 is provided, and the first motor 302 is connected to the hydraulic cylinder 303, which can drive the hydraulic cylinder 303 and the squeezing plate 305 to rotate. A plurality of grinding heads 304 are provided on the squeezing plate 305. During the rotation process, the grinding heads 304 can grind and crush the larger particles on the filter plate 306 for reuse.

[0034] like Figures 2 to 4 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: an annular scraper 307 is provided on the extrusion plate 305, and the annular scraper 307 is in contact with the inner wall of the extrusion tank body 301, and the annular scraper 307 is used to scrape off the slurry adhering to the inner wall of the extrusion tank body 301.

[0035] In this embodiment, a ring-shaped scraper is arranged at the edge of the circular extrusion plate 305. When the extrusion plate 305 moves downward, the scraper can scrape off the slurry adhering to the inner wall of the extrusion tank body 301, thereby avoiding slurry waste.

[0036] like Figures 5 to 9 As shown, a specific embodiment provided by the present invention on the basis of the above-mentioned embodiment is as follows: the slurry stirring tank 4 includes a stirring tank body 401, an internal stirring structure, an external stirring structure, and a rotary drive structure. The feed port and the discharge port are arranged on the stirring tank body 401, the discharge port is located at the lower part of the stirring tank body 401, and the slurry tank 7 is located below the discharge port; the internal stirring structure is arranged in the stirring tank body 401, and is rotatably connected to the stirring tank body 401; the external stirring structure is arranged in the stirring tank body 401, and is rotatably connected to the stirring tank body 401, the internal stirring structure is sleeved in the external stirring structure, and the internal stirring structure and the external stirring structure rotate in opposite directions, and the internal stirring structure and the external stirring structure are used to stir the slurry in the stirring tank body 401; the rotary drive structure is connected to the stirring tank body 401, and the rotary drive structure is transmission-connected to the internal stirring structure and the external stirring structure, and is used to drive the internal stirring structure and the external stirring structure to rotate in the opposite direction.

[0037] In this embodiment, an internal stirring structure and an external stirring structure are provided. The internal stirring structure is installed inside the external stirring structure. The external stirring structure and the internal stirring structure are rotatably connected to the stirring tank body 401. The internal stirring structure rotates in opposite directions to the external stirring structure, thereby forming reverse stirring, so that the slurry in the stirring tank body 401 is mixed more evenly.

[0038] In this embodiment, the discharge port is located at the lower part of the stirring tank body 401, and the slurry tank 7 is located below the discharge port. When the slurry is squeezed and flows into the stirring tank body 401, the slurry can flow into the slurry tank while being stirred under the action of gravity.

[0039] like Figures 5 to 9 As shown, the present invention provides a specific embodiment based on the above-mentioned embodiment as follows: the internal stirring structure includes a rotating shaft 405, a connecting seat 415, a fixed rod 404, a fixed frame 402, a fixed gear 407, a movable gear 408, and a first stirring rod 416. The rotating shaft 405 is rotatably connected with the stirring tank body 401. The rotating shaft 405 is a hollow structure. The upper end of the rotating shaft 405 extends out of the stirring tank body 401. The rotary drive structure can drive the rotating shaft 405 to rotate; the connecting seat 415 is connected to the rotating shaft 405, and the connecting seat 415 is located below the rotating shaft 405. The connecting seat 415 is provided with a through hole, and the through hole is coaxial with the inner hole of the rotating shaft 405; the fixed rod 404 It is inserted into the rotating shaft 405, the upper end of the fixed rod 404 extends out of the upper end of the rotating shaft 405, and the lower end of the fixed rod 404 extends out from the through hole of the connecting seat 415; the fixed frame 402 is arranged outside the mixing tank body 401, and is connected to the upper end of the fixed rod 404; the fixed gear 407 is connected to the lower end of the fixed rod 404; a plurality of movable gears 408 are rotatably connected to the connecting seat 415, the movable gear 408 is meshed with the fixed gear 407, and a plurality of movable gears 408 are arranged around the fixed gear 407 and can rotate around the fixed gear 407; each movable gear 408 is coaxially connected to a first stirring rod 416, and the first stirring rod 416 is provided with a first stirring blade 410.

[0040] In this embodiment, the upper end of the fixed rod 404 extends out of the mixing tank body 401 and is connected to the fixed frame 402, and the lower end of the fixed rod 404 is provided with a fixed gear 407. A rotating shaft 405 is arranged outside the fixed rod 404, and the rotating shaft 405 is rotatably connected to the mixing tank body 401, and the rotating shaft 405 is connected to the connecting seat 415, and a through hole is arranged on the connecting seat 415, and the lower end of the fixed rod 404 passes through the through hole on the connecting seat 415. The connecting seat 415 is rotatably connected to the moving gear 408, and the moving gear 408 and the fixed gear 407 are meshed with each other. Because the rotating shaft 405 is rotatably connected to the mixing tank body 401, when the rotating drive structure drives the rotating shaft 405 to rotate, the moving gear 408 will rotate around the fixed gear 407, and at the same time, when the moving gear 408 revolves around the fixed gear 407, it will also generate autorotation. The moving gear 408 is coaxially connected to the first stirring rod 416, and the first stirring rod 416 rotates and revolves with the moving gear 408, so that the stirring is more uniform.

[0041] In this embodiment, three moving gears 408 are provided, and the three moving gears 408 are evenly spaced apart along the annular direction of the fixed gear 407 .

[0042] like Figures 5 to 9 As shown, the present invention provides a specific embodiment based on the above-mentioned embodiment as follows: the external stirring structure includes a plurality of arc scrapers 409 and a second stirring rod 411, and the plurality of arc scrapers 409 are connected to the stirring tank body 401, and the arc scrapers 409 can rotate around the axis of the stirring tank body 401, and the arc scrapers 409 are in contact with the inner wall of the stirring tank body 401, and are used to scrape off the slurry adhering to the inner wall of the stirring tank body 401, and the rotary drive structure can drive the arc scrapers 409 to rotate; the second stirring rod 411 is arranged on the arc inner wall of the arc scraper 409, and a second stirring rod 411 is arranged on each arc scraper 409, and a second stirring blade 412 is arranged on the second stirring rod 411.

[0043] In this embodiment, a plurality of arc scrapers 409 are provided, and the arc scrapers 409 are rotatably connected to the stirring tank body 401, and the arc scrapers 409 are in contact with the inner wall of the stirring tank body 401. When the rotary drive structure drives the arc scrapers 409 to rotate around the axis of the stirring tank body 401, the arc scrapers 409 can scrape off the slurry adhering to the inner wall of the stirring tank body 401. At the same time, the second stirring rod 411 on the arc scraper 409 can form external stirring for the slurry when rotating with the arc scraper 409.

[0044] In this embodiment, three arc-shaped scrapers 409 are provided, and the three arc-shaped scrapers 409 are evenly arranged along the circumferential direction.

[0045] like Figures 5 to 9As shown, a specific embodiment of the present invention is provided on the basis of the above-mentioned embodiment as follows: the rotation driving structure includes an internal gear 406, a follower gear 414, a driving gear 413, and a second motor 403, the internal gear 406 is a ring structure, the internal gear 406 is rotatably connected to the mixing tank body 401, and a plurality of arc scrapers 409 are connected to the internal gear 406; the follower gear 414 is connected to the lower end of the rotating shaft 405, a through hole is provided in the middle of the follower gear 414, the through hole is coaxial with the through hole, the connecting seat 415 is connected to the follower gear 414, and the lower end of the fixing rod 404 passes through the through hole and the through hole in turn and extends out of the rotating shaft 405; the driving gear 413 is rotatably connected to the mixing tank body 401, and the driving gear 413 is meshed with the internal gear 406 and the follower gear 414; the second motor 403 is connected to the driving gear 413, and is used to drive the driving gear 413 to rotate.

[0046] In this embodiment, the mixing tank body 401 is rotatably connected to the internal gear 406, the internal gear 406 is coaxial with the mixing tank body 401, and the internal gear 406 can rotate around its own axis. The arc scraper 409 is connected to the internal gear 406, so that the arc scraper 409 can rotate around the axis of the mixing tank body 401. A follower gear 414 is provided at the lower end of the rotating shaft 405, and a through hole is provided in the middle of the follower gear 414. The connecting seat 415 is connected to the follower gear 414 and is located below the follower gear 414. The lower end of the fixed rod 404 passes through the through hole and the through hole in the rotating shaft 405 in sequence and is connected to the fixed gear 407. A driving gear 413 is also rotatably provided in the mixing tank body 401, and the driving gear 413 is meshed with the internal gear 406 and the follower gear 414 at the same time. The driving gear 413 is connected to the second motor 403. When the second motor 403 drives the driving gear 413 to rotate, the internal gear 406 rotates in the same direction as the driving gear 413, thereby driving the arc scraper 409 to rotate in the same direction as the driving gear 413. The follower gear 414 rotates in the opposite direction to the driving gear 413, and the follower gear 414 drives the rotating shaft 405 to rotate in the opposite direction, so that the first stirring rod 416 rotates in the opposite direction along with the connecting seat 415, realizing internal and external stirring in opposite directions, and at the same time, the first stirring rod 416 rotates by itself, so that the stirring is more thorough, which can better ensure the uniform mixing of the slurry.

[0047] like Figures 5 to 9 As shown, the present invention provides a specific implementation mode based on the above implementation mode as follows: the first stirring blade 410 is a spiral blade structure.

[0048] In this embodiment, the first stirring blade 410 is a spiral blade structure, so that the first stirring blade 410 can spirally stir the slurry when the first stirring rod 416 rotates.

[0049] like Figures 5 to 9As shown, the present invention provides a specific implementation method based on the above implementation method as follows: the second stirring rod 411 includes a horizontal rod and a vertical rod connected in sequence, the horizontal rods at both ends are connected to the arc scraper 409, and at least one second stirring blade 412 is arranged on each vertical rod, and the second stirring blade 412 is a disc structure.

[0050] In this embodiment, the distance from each arc-shaped vertical rod to the arc-shaped scraper 409 is different, so that stirring forces exist at different radii of the periphery. When multiple arc-shaped scrapers 409 are provided at the same time, the second stirring rod 411 on each arc-shaped scraper 409 can be provided at different heights to achieve stirring at different heights and different radii. In addition to the stirring of the second stirring rod 411, a second stirring blade 412 with a disc structure is provided on the second stirring rod 411, and the second stirring blade 412 can achieve radial cutting disturbance as the arc-shaped scraper 409 rotates.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

Claims

1. A slurry reflux device, characterized in that: include: A die head (5), wherein the die head (5) is provided with an inlet (501), a coating port (503) and a return port (502) which are interconnected, and the slurry is coated on the electrode piece through the coating port (503); A regulating valve (6) connected to the reflux port (502); A slurry recovery tank (1), connected to the regulating valve (6), and used to collect the slurry flowing out of the reflux port (502); A reflux pump (2) connected to the slurry recovery tank (1); A slurry extrusion tank (3), wherein the slurry extrusion tank (3) is provided with an openable and closable inlet and outlet, the inlet of the slurry extrusion tank (3) is connected to the reflux pump (2), and the slurry extrusion tank (3) is used to extrude and filter the slurry; A slurry stirring tank (4), wherein the slurry stirring tank (4) is provided with a feed inlet and a discharge outlet, the feed inlet of the slurry stirring tank (4) is connected to the discharge outlet of the slurry extrusion tank (3), and the slurry stirring tank (4) is used to stir the slurry; A slurry tank (7) connected to the discharge port of the slurry stirring tank (4); The control unit is electrically connected to the regulating valve (6), the reflux pump (2), the slurry extrusion tank (3), and the slurry stirring tank (4).

2. The slurry reflux device according to claim 1, characterized in that: The slurry extrusion tank (3) comprises: The extrusion tank body (301) is a hollow structure, the material inlet and the material outlet are arranged on the extrusion tank body (301), and a filter plate (306) is arranged above the material outlet; An extrusion plate (305) is disposed in the extrusion tank body (301), the extrusion plate (305) is slidably and sealingly connected to the extrusion tank body (301), and the extrusion plate (305) is capable of moving along the axis direction of the extrusion tank body (301); The hydraulic cylinder (303) is disposed in the squeezing tank body (301) and is connected to the squeezing plate (305) and is used to push the squeezing plate (305) to squeeze the slurry so that the slurry flows out through the filter plate (306).

3. The slurry reflux device according to claim 2, characterized in that: The extrusion tank body (301) is cylindrical, the extrusion plate (305) is a circular plate, and a first motor (302) is also provided on the extrusion tank body (301). The driving end of the first motor (302) extends into the extrusion tank body (301) and is connected to the hydraulic cylinder (303). The extrusion plate (305) is provided with a plurality of grinding heads (304) at the end in contact with the slurry. The first motor (302) is used to drive the extrusion plate (305) to rotate and grind the slurry particles on the filter plate (306) through the grinding heads (304).

4. The slurry reflux device according to claim 3, characterized in that: An annular scraper (307) is provided on the extrusion plate (305), the annular scraper (307) is in contact with the inner wall of the extrusion tank body (301), and the annular scraper (307) is used to scrape off slurry adhering to the inner wall of the extrusion tank body (301).

5. The slurry reflux device according to claim 1, characterized in that: The slurry stirring tank (4) comprises: A stirring tank body (401), wherein the feed port and the discharge port are arranged on the stirring tank body (401), the discharge port is located at the lower part of the stirring tank body (401), and the slurry tank (7) is located below the discharge port; An internal stirring structure, disposed in the stirring tank body (401) and rotatably connected to the stirring tank body (401); an external stirring structure, disposed in the stirring tank body (401) and rotatably connected to the stirring tank body (401); the internal stirring structure is sleeved in the external stirring structure; the internal stirring structure and the external stirring structure rotate in opposite directions; the internal stirring structure and the external stirring structure are used to stir the slurry in the stirring tank body (401); A rotation driving structure is connected to the stirring tank body (401), and the rotation driving structure is transmission-connected to the inner stirring structure and the outer stirring structure, and is used to drive the inner stirring structure and the outer stirring structure to rotate in opposite directions.

6. The slurry reflux device according to claim 5, characterized in that: The internal stirring structure comprises: A rotating shaft (405) is rotatably connected to the stirring tank body (401); the rotating shaft (405) is a hollow structure; the upper end of the rotating shaft (405) extends out of the stirring tank body (401); and the rotating drive structure is capable of driving the rotating shaft (405) to rotate; A connecting seat (415) connected to the rotating shaft (405), the connecting seat (415) being located below the rotating shaft (405), the connecting seat (415) being provided with a through hole, the through hole being coaxial with the inner hole of the rotating shaft (405); A fixing rod (404) is inserted into the rotating shaft (405), the upper end of the fixing rod (404) extends out of the upper end of the rotating shaft (405), and the lower end of the fixing rod (404) extends out of the through hole of the connecting seat (415); A fixing frame (402) is arranged outside the mixing tank body (401) and is connected to the upper end of the fixing rod (404); A fixed gear (407) connected to the lower end of the fixed rod (404); A plurality of movable gears (408) are rotatably connected to the connecting seat (415); the movable gears (408) are meshed with the fixed gear (407); and a plurality of movable gears (408) are arranged around the fixed gear (407) and are capable of rotating around the fixed gear (407); A first stirring rod (416), each of the moving gears (408) is coaxially connected to one of the first stirring rods (416), and a first stirring blade (410) is provided on the first stirring rod (416).

7. The slurry reflux device according to claim 6, characterized in that: The external stirring structure comprises: a plurality of arc-shaped scrapers (409) connected to the stirring tank body (401); the arc-shaped scrapers (409) are capable of rotating around the axis of the stirring tank body (401); the arc-shaped scrapers (409) are in contact with the inner wall of the stirring tank body (401) and are used to scrape off slurry adhering to the inner wall of the stirring tank body (401); and the rotary drive structure is capable of driving the arc-shaped scrapers (409) to rotate; The second stirring rod (411) is arranged on the arc-shaped inner wall of the arc-shaped scraper (409), and each arc-shaped scraper (409) is provided with a second stirring rod (411), and the second stirring rod (411) is provided with a second stirring blade (412).

8. The slurry reflux device according to claim 7, characterized in that: The rotary drive structure comprises: The internal gear (406) is an annular structure, the internal gear (406) is rotatably connected to the mixing tank body (401), and a plurality of arc-shaped scrapers (409) are connected to the internal gear (406); A follower gear (414) is connected to the lower end of the rotating shaft (405); a through hole is provided in the middle of the follower gear (414); the through hole is coaxial with the through hole; the connecting seat (415) is connected to the follower gear (414); the lower end of the fixing rod (404) passes through the through hole and the through hole in sequence and extends out of the rotating shaft (405); A driving gear (413) is rotatably connected to the mixing tank body (401), and the driving gear (413) is meshed with the internal gear (406) and the follower gear (414); The second motor (403) is connected to the driving gear (413) and is used to drive the driving gear (413) to rotate.

9. The slurry reflux device according to claim 6, characterized in that: The first stirring blade (410) is a spiral blade structure.

10. The slurry reflux device according to claim 7, characterized in that: The second stirring rod (411) comprises a horizontal rod and a vertical rod connected in sequence, the horizontal rods at both ends are connected to the arc-shaped scraper (409), and at least one second stirring blade (412) is arranged on each of the vertical rods, and the second stirring blade (412) is a disc structure.

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