Powder mixing and stirring device for dry-method electrode

Abstract

The utility model relates to the technical field of stirring equipment, in particular to a powder mixing and stirring device for a dry-method electrode, which comprises a stirring tank structure, and further comprises a feeding and discharging structure and a stirring structure which are arranged on the stirring tank structure, the stirring structure comprises a stirring rod rotationally connected to the stirring tank structure and a driving assembly used for driving the stirring rod, the stirring rod is provided with a helical ribbon assembly, a crushing assembly and a scraper assembly in the length direction of the stirring rod, and the crushing assembly comprises a plurality of connecting bolts fixedly connected to the stirring rod and crushing cutters fixedly connected to the connecting bolts; the crushing cutter has a crushing end; the scraper assembly is contacted with or separated from the inner wall of the stirring tank structure. The crushing cutter and the scraper assembly rotate along with the stirring rod, and the crushing cutter can apply large shearing force and impact force to caked materials through the crushing end of the crushing cutter to crush the caked materials into small particles. And the scraper assembly can scrape materials on the inner wall of the stirring tank, so that material residues are avoided, the stirring period is effectively shortened, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stirring equipment, in particular to a powder mixing and stirring device for dry-process electrodes. BACKGROUND

[0002] The dry-process electrode process does not require solvents, and directly processes dry powder into environmentally friendly self-supporting electrode films, which can effectively reduce processing costs and is widely used in the manufacture of semi-solid, full-solid and large cylindrical batteries. During the processing of dry powder materials for dry-process electrodes, the premixing and pre-fibrillation of dry powder are very important.

[0003] Stirring is a common means of premixing dry-process electrode powder, and as the dry-process electrode manufacturing process continues to develop, the quality and efficiency of dry-process electrode material mixing are increasingly demanding. Conventional stirring devices use a stirring rod structure, which on the one hand is prone to uneven stirring, and on the other hand the stirring effect of the stirring rod on the material is limited, and the material is prone to sticking to the inner wall of the stirring device. CONTENT OF THE INVENTION

[0004] In order to improve the poor stirring effect of the stirring device in the related art, the present application provides a powder mixing and stirring device for dry-process electrodes.

[0005] A powder mixing and stirring device for dry-process electrodes, comprising a stirring tank structure, further comprising an inlet and outlet structure and a stirring structure arranged on the stirring tank structure; the stirring structure comprises a stirring rod rotatably connected to the stirring tank structure and a driving assembly for driving the stirring rod, the stirring rod is provided with a spiral belt assembly, a crushing assembly and a scraper assembly along its length direction, the crushing assembly comprises a plurality of connecting pins fixedly connected to the stirring rod and a crushing knife fixedly connected to the connecting pins, the crushing knife has a crushing end; the scraper assembly is in contact or separated from the inner wall of the stirring tank structure.

[0006] Further, the crushing knife comprises a knife body fixedly connected to the connecting pin and two side blades arranged on the knife body, the end portions of the two side blades are close to each other to form the crushing end.

[0007] Further, the crushing knives are uniformly arranged along the length direction of the stirring rod, and the crushing ends of the plurality of crushing knives are directed in the same direction.

[0008] Further, the spiral belt assembly comprises an inner spiral belt and an outer spiral belt arranged on the stirring rod, the inner spiral belt is spirally arranged along the length direction of the stirring rod, and the outer spiral belt is spirally arranged along the length direction of the stirring rod; the inner spiral belt is located on the side of the outer spiral belt close to the stirring rod.

[0009] Further, the helical direction of the inner helical belt is opposite to the helical direction of the outer helical belt.

[0010] Further, the helical belt assembly further comprises a plurality of fixing rods arranged along the length direction of the stirring rod, and the fixing rods are connected to the outer helical belt.

[0011] Further, the scraper assembly comprises a scraper fixedly connected to the outer helical belt, the scraper is located on the side of the outer helical belt away from the inner helical belt, and the scraper abuts against the inner wall of the stirring tank structure.

[0012] Further, the feeding and discharging structure comprises a feeding assembly and a discharging assembly, the feeding assembly comprises a feeding pipe connected to the stirring tank structure and a feeding pump connected to the feeding pipe, and the discharging assembly comprises a discharging pipe connected to the stirring tank structure and a discharging pump connected to the discharging pipe.

[0013] The utility model has the following advantages:

[0014] 1. The utility model relates to a powder mixing and stirring device for dry-process electrode, which is provided with a helical belt assembly, a crushing assembly and a scraper assembly on the stirring rod, when the driving assembly drives the stirring rod to rotate, the crushing knife rotates with the stirring rod, the crushing knife can exert a large shear force and impact force on the caked material through the crushing end, so that the material is crushed into smaller particles, the material can be uniformly dispersed during stirring to prevent caking, and the powder can be fully stirred in a short time; the scraper assembly can scrape off the material on the inner wall of the stirring tank to avoid material residue, effectively shorten the stirring period, improve the production efficiency, ensure the stirring quality, and improve the poor stirring effect of the stirring device in the related technology.

[0015] 2. The utility model relates to a powder mixing and stirring device for dry-process electrode, which is provided with a scraper, when the scraper rotates with the outer helical belt, the material adhered to the inner wall of the stirring tank structure can be scraped off, after the material is discharged, the inner wall of the stirring device does not need to be cleaned by spending extra manpower and material resources, the cleaning cost is saved, and the material waste is reduced.

[0016] 3. The utility model is provided with a feeding pipe and a discharging pipe driven by a feeding pump and a discharging pump, when feeding and discharging, the material is sucked into the stirring tank structure through the feeding pipe for stirring, and is sucked out to the discharge through the discharging pipe, the dust raising phenomenon caused by directly feeding or discharging the stirring tank structure is avoided, and the operator and the processing environment are protected. DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0018] Figure 1 A structural schematic diagram of a powder mixing and stirring device for dry electrodes according to an embodiment of the present application;

[0019] Figure 2 Another structural schematic diagram of a powder mixing and stirring device for dry electrodes according to an embodiment of the present application;

[0020] Figure 3 An internal structural schematic diagram of a stirring tank according to an embodiment of the present application;

[0021] Figure 4 A structural schematic diagram of a stirring structure according to an embodiment of the present application.

[0022] Explanation of reference signs:

[0023] 1, stirring tank structure; 11, stirring tank body; 12, sealing cover; 13, support column; 2, feeding and discharging structure; 21, feeding assembly; 211, feeding pipe; 22, discharging assembly; 221, discharging pipe; 3, stirring structure; 31, stirring rod; 32, driving assembly; 33, screw belt assembly; 331, inner screw belt; 332, outer screw belt; 333, fixed rod; 34, crushing assembly; 341, connecting bolt; 342, crushing knife; 3421, crushing end; 3422, knife body; 3423, side blade; 35, scraper assembly; 351, scraper. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Reference Figure 1 as well as Figure 2 A powder mixing and stirring device for dry electrode includes a mixing tank structure 1, an inlet / outlet structure 2 and a stirring structure 3 disposed on the mixing tank structure 1. When the powder mixing and stirring device is running, the inlet / outlet structure 2 introduces and discharges the material, and the stirring structure 3 stirs the introduced material.

[0029] Specifically, the stirring tank structure 1 comprises a stirring tank body 11, which is in a U-shaped structure and has a resistance wire installed in the outer shell sandwich for heating. A temperature control panel is fixedly installed on the outer surface of the front end of the stirring tank body 11. The temperature control panel can be used to control the current through the resistance wire, thereby adjusting the temperature inside the stirring tank body 11. A sealing cover 12 is movably installed on the outer surface of the upper end of the stirring tank body 11. The upper end of the stirring tank body 11 has a large opening to facilitate maintenance and cleaning of the inside of the stirring tank body 11. The sealing cover 12 can close the opening of the stirring tank body 11 to prevent dust from being raised during the stirring of the powder material. A plurality of support columns 13 are fixedly installed on the outer surface of the lower end of the stirring tank body 11. The support columns 13 are used to support the stirring tank body 11 and increase the stability of the stirring device.

[0030] The in-out structure 2 comprises an in-feed assembly 21 and an out-feed assembly 22. The in-feed assembly 21 comprises an in-feed pipe 211 connected to the stirring tank structure 1 and an in-feed pump connected to the in-feed pipe 211. The rear end of the stirring tank body 11 has an in-feed port. The in-feed pipe 211 is in communication with the in-feed port. Under the drive of the in-feed pump, the material can be sucked into the inside of the stirring tank body 11 through the in-feed pipe 211 and the in-feed port for stirring. Similarly, the out-feed assembly 22 comprises an out-feed pipe 221 connected to the stirring tank structure 1 and an out-feed pump connected to the out-feed pipe 221. The other side of the stirring tank body 11 has an out-feed port. The out-feed pipe 221 is in communication with the out-feed port. The stirred material can be sucked into the out-feed pipe 221 by the out-feed pump for discharge.

[0031] Referring to Figure 3 and Figure 4 , the stirring structure 3 comprises a stirring rod 31 rotatably connected to the stirring tank structure 1 and a drive assembly 32 for driving the stirring rod 31. The stirring rod 31 is provided with a spiral belt assembly 33, a crushing assembly 34 and a scraper assembly 35 along its length direction. In this embodiment, the drive assembly 32 is an electric motor. Under the drive of the drive assembly 32, the stirring rod 31 will continuously rotate, thereby driving the spiral belt assembly 33, the crushing assembly 34 and the scraper assembly 35 to rotate synchronously.

[0032] The screw belt assembly 33 comprises an inner screw belt 331 and an outer screw belt 332 arranged on the stirring rod 31. The inner screw belt 331 is arranged spirally along the length direction of the stirring rod 31, and the outer screw belt 332 is arranged spirally along the length direction of the stirring rod 31. The inner screw belt 331 is located on the side of the outer screw belt 332 close to the stirring rod 31. The screw belt assembly 33 further comprises a plurality of fixing rods 333 arranged along the length direction of the stirring rod 31. The fixing rods 333 are connected to the outer screw belt 332 to reinforce the structure of the outer screw belt 332. In this embodiment, the spiral direction of the inner screw belt 331 is opposite to that of the outer screw belt 332. When the stirring rod 31 rotates, the outer screw belt 332 has a large pitch to carry the material on the inner wall of the stirring tank 11 to the center of the shaft, and the inner screw belt 331 has a small pitch to turn the material at the center of the shaft outward, so that the material is mixed in all directions in the stirring tank 11, ensuring that the material is fully stirred in a short time, thereby improving the stirring efficiency and uniformity.

[0033] The crushing assembly 34 comprises a plurality of connecting bolts 341 fixedly connected to the stirring rod 31 and a crushing knife 342 fixedly connected to the connecting bolt 341. The crushing knife 342 has a crushing end 3421. The crushing knife 342 comprises a knife body 3422 fixedly connected to the connecting bolt 341 and two side blades 3423 arranged on the knife body 3422. The end portions of the two side blades 3423 are close to each other to form the crushing end 3421, i.e., the crushing knife 342 is arranged in a triangular shape. The crushing knife 342 is uniformly arranged along the length direction of the stirring rod 31. The crushing ends 3421 of the plurality of crushing knives 342 face the same direction. In this embodiment, the crushing ends 3421 of the crushing knives 342 face the rotating direction of the stirring rod 31. The crushing knife 342 is made of stainless steel, which has strong corrosion resistance and high hardness. The wide bottom and the gradually narrowing crushing end 3421 of the crushing knife 342 can exert a large shear force and impact force on the caked material during rotation to crush it into smaller particles.

[0034] The scraper assembly 35 is in contact with or separated from the inner wall of the stirring tank structure 1. In this embodiment, the scraper assembly 35 comprises a scraper plate 351 fixedly connected to the outer screw belt 332. The scraper plate 351 is located on the side of the outer screw belt 332 away from the inner screw belt 331 and abuts against the inner wall of the stirring tank structure 1. When the stirring rod 31 rotates, the scraper plate 351 can scrape the inner wall of the stirring tank 11, thereby avoiding the material remaining on the inner wall of the stirring tank 11.

[0035] When the high-speed powder mixing device of dry electrode is used, firstly, the container containing electrode material is placed at the bottom of the feeding pipe 211, and then the feeding pump is started to suck the material into the inside of the stirring tank body 11 for stirring. The stirring motor drives the stirring rod 31 to rotate inside the stirring tank body 11, and the inner screw belt 331, the outer screw belt 332, the scraper 351 and the crushing knife 342 are driven to rotate by the rotation of the stirring rod 31. The inner screw belt 331 and the outer screw belt 332 quickly mix the material. Since the scraper 351 is attached to the inner wall of the stirring tank body 11, it can scrape off the material adhered to the inner wall of the stirring tank body 11 when it rotates. At the same time, the crushing end 3421 of the crushing knife 342 crushes the material, which can make the material evenly dispersed during stirring to prevent clumping, realize full stirring of the powder in a short time, effectively shorten the stirring period, improve the production efficiency, reduce the energy consumption and production cost, and is especially suitable for the fiberization of the adhesive polytetrafluoroethylene. Finally, the stirred material is sucked into the discharge pipe 221 by the discharge pump for discharge, avoiding dust raising to harm the health of workers and pollute the air.

[0036] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0037] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A powder mixing and stirring device for dry-process electrodes, comprising a stirring tank structure (1), characterized in that, Also include the setting in the stirring tank structure (1) access to the material structure (2) and stirring structure (3);The stirring structure (3) includes the stirring rod (31) rotationally connected to the stirring tank structure (1) and the drive assembly (32) for driving the stirring rod (31), the stirring rod (31) is provided with a spiral belt assembly (33), a crushing assembly (34) and a scraper assembly (35) along its length direction, the crushing assembly (34) includes a plurality of connecting bolts (341) fixedly connected to the stirring rod (31) and a crushing knife (342) fixedly connected to the connecting bolt (341), the crushing knife (342) has a crushing end (3421);The scraper assembly (35) is in contact or separated from the inner wall of the stirring tank structure (1); The crushing knife (342) includes a blade body (3422) fixedly connected with the connecting bolt (341) and two side blades (3423) provided on the blade body (3422), the ends of the two side blades (3423) are close to each other to form the crushing end (3421).

2. A powder mixing and stirring device for dry-process electrodes according to claim 1, characterized in that The crushing knife (342) is uniformly arranged along the length direction of the stirring rod (31), and the crushing ends (3421) of a plurality of the crushing knives (342) face the same direction.

3. A powder mixing and stirring device for dry-process electrodes according to claim 1 or 2, characterized in that The spiral belt assembly (33) includes an inner spiral belt (331) and an outer spiral belt (332) provided on the stirring rod (31), the inner spiral belt (331) is spirally arranged along the length direction of the stirring rod (31), and the outer spiral belt (332) is spirally arranged along the length direction of the stirring rod (31);The inner spiral belt (331) is located on the side of the outer spiral belt (332) close to the stirring rod (31).

4. A powder mixing and stirring device for dry-process electrodes according to claim 3, characterized in that The spiral direction of the inner spiral belt (331) is opposite to the spiral direction of the outer spiral belt (332).

5. A powder mixing and stirring device for dry-process electrodes according to claim 3, characterized in that The spiral belt assembly (33) further includes a plurality of fixing rods (333), and a plurality of the fixing rods (333) are arranged along the length direction of the stirring rod (31), and the fixing rod (333) is connected to the outer spiral belt (332).

6. A powder mixing and stirring device for dry-process electrodes according to claim 3, characterized in that The scraper assembly (35) includes a scraper (351) fixedly connected to the outer spiral belt (332), the scraper (351) is located on the side of the outer spiral belt (332) away from the inner spiral belt (331), and the scraper (351) abuts against the inner wall of the stirring tank structure (1).

7. A powder mixing and stirring device for dry-process electrodes according to claim 1, characterized in that The access to the material structure (2) includes a feeding assembly (21) and a discharging assembly (22), the feeding assembly (21) includes a feeding pipe (211) connected to the stirring tank structure (1) and a feeding pump connected to the feeding pipe (211);The discharging assembly (22) includes a discharging pipe (221) connected to the stirring tank structure (1) and a discharging pump connected to the discharging pipe (221).

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