Stirring blade assembly, stirring device and battery production system

Abstract

The utility model discloses a stirring blade assembly, a stirring device and a battery production system. The stirring blade assembly provided by the utility model comprises a stirring shaft; comprising a first stirring blade, a second stirring blade and at least one third stirring blade, the first stirring blade, the second stirring blade and the third stirring blade are respectively connected with the stirring shaft and are arranged at intervals in the axial direction of the stirring shaft, and the at least one third stirring blade is located between the first stirring blade and the second stirring blade. A material folding surface is formed on the surface, deviating from the first stirring blade, of the second stirring blade in the circumferential direction of the stirring shaft, and the distance between a plurality of points on the material folding surface and the first plane is gradually reduced in the radial inward direction of the stirring shaft. The distance between the points on the material folding surface and the first plane is gradually reduced, and the movement track of the material can be changed by colliding with the material folding surface, so that the amount of the material falling back to the stirring area is reduced, and the stirred material in the stirring area can be stirred more uniformly.

Description

Technical Field

[0001] The present application relates to a battery production device, and in particular to a stirring blade assembly, a stirring device and a battery production system. Background Art

[0002] The stirring device has multiple stirring blades, and the stirring blades have the same structure, which has the problem that the stirring materials are not uniform enough. Utility Model Content

[0003] In view of the above problems, the present application provides a stirring blade assembly, a stirring device and a battery production system, which can improve the problem of uneven stirring of the stirring blade.

[0004] In a first aspect, the present application provides a stirring blade assembly, comprising:

[0005] Stirring shaft;

[0006] A first stirring blade, a second stirring blade and at least one third stirring blade, the first stirring blade, the second stirring blade and the third stirring blade are respectively connected to the stirring shaft and are spaced apart along the axial direction of the stirring shaft, at least one third stirring blade is located between the first stirring blade and the second stirring blade, along the circumferential direction of the stirring shaft, the distances between multiple points on the surface of the first stirring blade facing the third stirring blade and the first plane are increasing or decreasing, a folding surface is formed on the surface of the second stirring blade facing away from the first stirring blade, along the radial inward direction of the stirring shaft, the distances between multiple points on the folding surface and the first plane are decreasing, the first plane is perpendicular to the axis of the stirring shaft, and is located between the first stirring blade and the third stirring blade.

[0007] The distance between the points on the surface of the first stirring blade facing the third stirring blade and the first plane tends to increase or decrease. When the stirring shaft rotates, the first stirring blade stirs the material and can lift at least part of the material at the same time, so that part of the agglomerated material is further stirred in the stirring zone between the second stirring blade and the third stirring blade, and the other part of the agglomerated material passes over the second stirring blade. In the process of the material falling back, the distance between multiple points on the folding surface and the first plane tends to decrease. By colliding with the folding surface, the movement trajectory of the material can be changed to reduce the amount of material falling back to the stirring zone, so that the material that has been stirred in the stirring zone can be stirred more evenly.

[0008] In some embodiments, the folding surface includes a concave arc surface, so that the folding surface can change the movement trajectory of the material to reduce the amount of material directly falling into the stirring zone along the axial direction of the stirring shaft, so that the material in the stirring zone that has been stirred can be fully stirred.

[0009] In some embodiments, the second stirring blade includes a first part and a second part, the first part is connected to the stirring shaft, the second part is connected to the first part and is arranged at an angle with the first part, the angle between the second part and the first part is greater than 90° and less than 180°, and the surface of the second part facing away from the first stirring blade forms at least a partial material folding surface. Thus, the material can be bounced upward obliquely on the material folding surface to change the movement direction of the material, reduce mixing in the stirring zone, and allow the material in the stirring zone to be fully stirred.

[0010] In some embodiments, there are multiple first stirring blades, and the multiple first stirring blades are arranged at intervals along the circumferential direction of the stirring shaft. The surface of the first stirring blade facing the third stirring blade forms a first surface, and along the circumferential direction of the stirring shaft, the first surfaces of any two adjacent first stirring blades face the same direction. Thus, compared with the case where the number of the first stirring blade is one, the time for the material to be thrown upward can be shortened to improve the stirring efficiency.

[0011] In some embodiments, the third stirring blade coincides with or is parallel to the first plane. During the stirring process, compared with a structure in which the third stirring blade is at an angle to the first plane, it is easier to break up the agglomerated materials and stir the materials more evenly.

[0012] In a second aspect, the present application provides a stirring device, comprising:

[0013] A stirring tank, wherein a stirring chamber is formed inside the stirring tank;

[0014] The stirring blade assembly of the first aspect is arranged in the stirring chamber, the stirring shaft is rotatably connected to the stirring tank, and the first stirring blade is located between the third stirring blade and the bottom wall.

[0015] When the stirring shaft rotates, the first stirring blade stirs the material and can lift at least part of the material at the same time, so that part of the agglomerated material is further stirred in the stirring zone between the second stirring blade and the third stirring blade, and the other part of the agglomerated material passes over the second stirring blade. In the process of the material falling back, the movement trajectory of the material can be changed by colliding with the folding surface to reduce the amount of material falling back to the stirring zone, so that part of the material is bounced to the side wall of the stirring tank and falls from the side wall to the bottom wall. It is stirred under the action of the first stirring blade to reduce the probability of the stirring zone between the second stirring blade and the third stirring blade directly mixing into the agglomerated material, so that the agglomerated material is first preliminarily stirred by the first stirring blade and then enters the stirring zone, so that the material is stirred more evenly.

[0016] In some embodiments, the stirring device further comprises a bottom plate, which is arranged in the stirring chamber and spaced apart from the bottom wall, and a plurality of blowing holes are formed on the surface of the bottom plate facing the bottom wall, and the blowing holes penetrate the bottom plate along the thickness direction of the bottom plate, and an air inlet is formed on the outer surface of the bottom wall, and the air inlet is connected to the stirring chamber through the blowing holes, and an exhaust port is formed on the top wall of the stirring tank, and the exhaust port is connected to the stirring chamber. By introducing gas into the stirring chamber through the air inlet, the material accumulated in the dead corner of the stirring chamber can be blown away, and heat exchange can also occur with the material to reduce the temperature of the material during the stirring process.

[0017] In some embodiments, the stirring device further comprises a filter screen, and a filter screen is arranged between the bottom plate and the bottom wall. When gas is introduced into the air inlet, the gas passes through the filter screen and the blowing hole into the stirring chamber to blow away the material accumulated in the stirring chamber, and the filter screen can prevent the material from being discharged from the air inlet.

[0018] In some embodiments, the stirring device further comprises a scraper, which is located in the stirring chamber and is rotatably connected to the stirring tank, and the scraper is used to scrape the material on the inner wall of the stirring tank. Thus, the scraper can reduce the accumulation of material on the inner wall to improve the stirring effect.

[0019] In some embodiments, the surface of the scraper facing the inner wall is provided with a wear-resistant layer, and the wear-resistant layer is arranged in contact with the inner wall. Compared with the structure in which the scraper is in contact with the inner wall, the wear of the scraper can be reduced and the service life of the scraper can be extended.

[0020] In some embodiments, the wear-resistant layer includes any one of a polyurethane layer, a polyethylene layer, a polytetrafluoroethylene layer and tungsten carbide, thereby reducing the wear of the wear-resistant layer.

[0021] In some embodiments, the stirring device further comprises a first driving mechanism, which is drivingly connected to the scraper and is used to drive the scraper to rotate relative to the stirring tank, and the axis of rotation of the scraper relative to the stirring tank coincides with or is parallel to the axis of the stirring tank. Compared with manual driving, the first driving mechanism drives the scraper to rotate, which saves more manpower.

[0022] In some embodiments, the stirring tank includes a tank body and an end cover, a cavity is formed inside the tank body, an opening connected to the cavity is formed at one end of the tank body, the end cover is covered at the opening and is connected to the tank body in an openable and closable manner, the end cover and the tank body together define a stirring chamber, the scraper is rotatably connected to the end cover, the wall of the bottom of the tank body forms the bottom wall of the stirring tank, and the inner peripheral surface of the tank body forms at least part of the inner wall. The scraper is arranged on the end cover, and after the end cover is separated from the tank body, it is convenient to clean the material on the inner wall of the tank body after loading and stirring.

[0023] In some embodiments, the stirring device further comprises a second driving mechanism, which is drivingly connected to the stirring shaft and is used to drive the stirring shaft to rotate relative to the stirring tank. Compared with the method of manually rotating the stirring shaft, it saves more manpower.

[0024] In some embodiments, an annular cavity surrounding the axis of the stirring tank is formed inside the side wall of the stirring tank, and a heat exchange medium inlet and a heat exchange medium outlet are formed on the outer surface of the stirring tank. The heat exchange medium inlet and the heat exchange medium outlet are respectively connected to the annular cavity and are arranged at intervals. The heat exchange medium is introduced into the heat exchange medium inlet and flows out from the heat exchange medium outlet, so that the material in the stirring tank can be cooled to reduce the temperature of the material during the stirring process.

[0025] In some embodiments, a discharge port is formed on the side wall or the bottom wall of the mixing tank, thereby facilitating discharge of materials.

[0026] In a third aspect, the present application provides a battery production system, comprising the stirring device of the second aspect, the stirring device being used to stir the slurry of the battery pole piece.

[0027] Since the battery production system includes all the technical features of the stirring device, the effects are the same as those of the stirring device and will not be described in detail here.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0030] Figure 1 An axonometric view of a stirring blade assembly according to an embodiment of the present application;

[0031] Figure 2 A side view of a stirring blade assembly according to an embodiment of the present application;

[0032] Figure 3 It is a cross-sectional view of a longitudinal section of a stirring device according to an embodiment of the present application, wherein the longitudinal section is a section passing through the axis of the stirring tank;

[0033] Figure 4 for Figure 3 A local enlarged view at location I;

[0034] Figure 5 A top view of a bottom plate of a stirring device according to an embodiment of the present application.

[0035] The reference numerals in the specific implementation manner are as follows:

[0036] 100. stirring device;

[0037] 10. stirring blade assembly; 11. stirring shaft; 12. first stirring blade; 13. second stirring blade; 131. first part; 132. second part; 1321. folding surface; 14. third stirring blade;

[0038] 20. stirring tank; 21. tank body; 211. air inlet; 212. heat exchange medium inlet; 213. heat exchange medium outlet; 214. discharge port; 215. annular cavity; 216. bottom wall; 22. end cover; 221. exhaust port;

[0039] 30. Scraper;

[0040] 40. Wear-resistant layer;

[0041] 50. A first driving mechanism;

[0042] 60. Second driving mechanism;

[0043] 70. bottom plate; 71. air blowing hole;

[0044] 80. Filter. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] At present, the stirring device has multiple stirring blades, which are arranged at intervals along the axial direction of the stirring shaft. The structure of each stirring blade is the same. The problem is that the agglomerated materials (materials that have not been dispersed) are easily dropped into the stirring zone between the multiple stirring blades after being lifted up by the stirring blades, causing the materials that are stirred relatively evenly in the stirring zone to be mixed with the agglomerated materials, which will increase the stirring time and affect the stirring effect.

[0054] In view of this, the present application provides a stirring blade assembly, in which the distance between the points on the surface of the first stirring blade facing the third stirring blade and the first plane shows an increasing or decreasing trend. When the stirring shaft rotates, the first stirring blade stirs the material and can lift at least part of the material at the same time, so that part of the agglomerated material is further stirred in the stirring zone between the second stirring blade and the third stirring blade, and the other part of the agglomerated material passes over the second stirring blade. In the process of the material falling back, the distance between the points on the folding surface and the first plane shows a decreasing trend. By colliding with the folding surface, the movement trajectory of the material can be changed to reduce the amount of material falling back to the stirring zone, so that the material that has been stirred in the stirring zone can be stirred more evenly.

[0055] The stirring blade assembly provided in the present application can be used for stirring solid materials or semi-solid materials.

[0056] For the convenience of explanation, please refer to the following examples. Figure 1 and Figure 5 , a stirring blade assembly 10 according to some embodiments of the present application is taken as an example for description.

[0057] The stirring blade assembly 10 includes a stirring shaft 11, a first stirring blade 12, a second stirring blade 13 and at least one third stirring blade 14. The first stirring blade 12, the second stirring blade 13 and the third stirring blade 14 are respectively connected to the stirring shaft 11 and are arranged at intervals along the axial direction of the stirring shaft 11. At least one third stirring blade 14 is located between the first stirring blade 12 and the second stirring blade 13. Along the circumferential direction of the stirring shaft 11, the distances between multiple points on the surface of the first stirring blade 12 facing the third stirring blade 14 and the first plane are increasing or decreasing. A folding surface 1321 is formed on the surface of the second stirring blade 13 away from the first stirring blade 12. Along the radial inward direction of the stirring shaft 11, the distances between multiple points on the folding surface 1321 and the first plane are decreasing. The first plane is perpendicular to the axis of the stirring shaft 11 and is located between the first stirring blade 12 and the third stirring blade 14.

[0058] Optionally, the surface of the first stirring blade 12 facing the third stirring blade 14 and the folding surface 1321 can both be a flat surface or a curved surface.

[0059] The radially inward direction of the stirring shaft 11 refers to the radial direction toward the axis of the stirring shaft 11 .

[0060] The number of the first stirring blades 12 and the number of the second stirring blades 13 may be one or more.

[0061] Exemplarily, there are multiple first stirring blades 12 , and the multiple first stirring blades 12 are evenly distributed along the circumferential direction of the stirring shaft 11 .

[0062] The connection between the first stirring blade 12 , the second stirring blade 13 and the third stirring blade 14 and the stirring shaft 11 includes, but is not limited to, welding, bolting or riveting.

[0063] The distance between the points on the surface of the first stirring blade 12 facing the third stirring blade 14 and the first plane shows an increasing or decreasing trend. When the stirring shaft 11 rotates, the first stirring blade 12 can stir the material and at the same time lift up at least part of the material, so that part of the agglomerated material is further stirred in the stirring zone between the second stirring blade 13 and the third stirring blade 14, and another part of the agglomerated material passes over the third stirring blade 14. In the process of the material falling back, the distance between multiple points on the folding surface 1321 and the first plane shows a decreasing trend. By colliding with the folding surface 1321, the movement trajectory of the material can be changed to reduce the amount of material falling back to the stirring zone, so that the material that has been stirred in the stirring zone can be stirred more evenly.

[0064] In some embodiments, the folding surface 1321 includes a concave arc surface.

[0065] The folding surface 1321 may be formed by one or both of an arc surface and a plane.

[0066] Exemplarily, the folding surface 1321 includes an arc surface and a plane, and the plane is tangent to the arc surface.

[0067] Therefore, the folding surface 1321 can change the movement trajectory of the material to reduce the amount of material that directly falls into the stirring zone along the axial direction of the stirring shaft 11, so that the material that has been stirred in the stirring zone can be fully stirred.

[0068] In some embodiments, please refer to Figure 1 The second stirring blade 13 includes a first part 131 and a second part 132. The first part 131 is connected to the stirring shaft 11, and the second part 132 is connected to the first part 131 and is arranged at an angle to the first part 131. The angle between the second part 132 and the first part 131 is greater than 90° and less than 180°. The surface of the second part 132 facing away from the first stirring blade 12 forms at least a partial folding surface 1321.

[0069] The surface of the second portion 132 facing away from the first stirring blade 12 can form the entire folding surface 1321, or can form a portion of the folding surface 1321. Exemplarily, the surface of the second portion 132 facing away from the first stirring blade 12 forms a portion of the folding surface 1321, and the surface of the first portion 131 facing away from the first stirring blade 12 forms another portion of the folding surface 1321.

[0070] Thus, the material can be bounced upward obliquely on the folding surface 1321, so that the material in the stirring zone can be fully stirred.

[0071] In some embodiments, please refer to Figure 1 There are multiple first stirring blades 12, and the multiple first stirring blades 12 are arranged at intervals along the circumferential direction of the stirring shaft 11. The surface of the first stirring blade 12 facing the third stirring blade 14 forms a first surface. Along the circumferential direction of the stirring shaft 11, the first surfaces of any two adjacent first stirring blades 12 face the same direction.

[0072] Therefore, compared with the case where the number of the first stirring blade 12 is one, the time for the material to be thrown upward can be shortened to improve the stirring efficiency.

[0073] In some embodiments, the third stirring blade 14 is coincident with or parallel to the first plane. During the stirring process, compared with the structure in which the third stirring blade 14 is at an angle to the first plane, it is easier to break up the agglomerated materials and stir the materials more evenly. In other examples, the third stirring blade 14 is set at an angle to the first plane.

[0074] For the convenience of explanation, please refer to the following examples. Figure 3-Figure 5 , a stirring device 100 according to some embodiments of the present application is taken as an example for description.

[0075] The stirring device 100 includes a stirring tank 20 and a stirring blade assembly 10 of the above embodiment. A stirring chamber is formed inside the stirring tank 20. The stirring blade assembly 10 is disposed in the stirring chamber, the stirring shaft 11 is rotatably connected to the stirring tank 20, and the first stirring blade 12 is located between the third stirring blade 14 and the bottom wall 216.

[0076] Optionally, the stirring shaft 11 is rotatably connected to the bottom wall 216 of the stirring tank 20 , and may also be rotatably connected to the top wall of the stirring tank 20 .

[0077] The stirring shaft 11 can be driven manually or by a first motor.

[0078] When the stirring shaft 11 rotates, the first stirring blade 12 stirs the material and can lift at least part of the material at the same time, so that part of the agglomerated material is further stirred in the stirring zone between the second stirring blade 13 and the third stirring blade 14, and another part of the agglomerated material passes over the second stirring blade 13. In the process of the material falling back, the movement trajectory of the material can be changed by colliding with the folding surface 1321 to reduce the amount of material falling back to the stirring zone, so that part of the material is bounced to the side wall of the stirring tank 20, and falls from the side wall to the bottom wall 216, and is stirred under the action of the first stirring blade 12 to reduce the probability of the agglomerated material being directly mixed into the stirring zone between the second stirring blade 13 and the third stirring blade 14, so that the agglomerated material is first preliminarily stirred by the first stirring blade 12 and then enters the stirring zone, so that the material is stirred more evenly.

[0079] In some embodiments, please refer to Figure 3 and Figure 4 The stirring device 100 also includes a bottom plate 70, which is arranged in the stirring chamber and is spaced apart from the bottom wall 216. A plurality of blowing holes 71 are formed on the surface of the bottom plate 70 facing the bottom wall 216. The blowing holes 71 penetrate the bottom plate 70 along the thickness direction of the bottom plate 70. An air inlet 211 is formed on the outer surface of the bottom wall 216. The air inlet 211 is connected to the stirring chamber through the blowing holes 71. An exhaust port 221 is formed on the top wall of the stirring tank 20. The exhaust port 221 is connected to the stirring chamber.

[0080] Optionally, a plurality of circles of air inlet holes are formed on the outer surface of the bottom plate 70 , each circle of air inlet holes has a plurality of air inlet holes, and the air inlet holes are arranged at intervals along the circumference of the stirring shaft 11 , and the plurality of circles of air inlet holes are arranged at intervals along the radial direction of the stirring shaft 11 .

[0081] The air inlet hole may be in a shape of, but not limited to, circular, rectangular or polygonal.

[0082] By introducing gas into the stirring chamber through the air inlet, the materials accumulated in the dead corners of the stirring chamber can be blown away, and heat exchange can also occur with the materials to reduce the temperature of the materials during the stirring process.

[0083] In some embodiments, please refer to Figure 3 and Figure 4 The stirring device 100 further includes a filter screen 80, which is disposed between the bottom plate 70 and the bottom wall 216. When gas is introduced into the air inlet 211, the gas passes through the filter screen 80 and the air blowing hole 71 and enters the stirring chamber to blow away the material accumulated in the stirring chamber, and the filter screen 80 can prevent the material from being discharged from the air inlet 211.

[0084] In some embodiments, please refer to Figure 3 The stirring device 100 further includes a scraper 30 , which is located in the stirring chamber and is rotatably connected to the stirring tank 20 . The scraper 30 is used to scrape the material on the inner wall of the stirring tank 20 .

[0085] Optionally, the scraper 30 extends along the axial direction of the stirring tank 20, and the scraping portion of the scraper 30 is a strip-shaped structure.

[0086] Exemplarily, the scraper 30 is rotatably connected to the top wall of the mixing tank 20 via a rotating shaft. The stirring shaft 11 is rotatably connected to the bottom wall 216 of the mixing tank 20. In other examples, the scraper 30 is rotatably connected to the bottom wall 216 of the mixing tank 20 via a rotating shaft, and the stirring shaft 11 is rotatably connected to the top wall of the mixing tank 20.

[0087] Therefore, the arrangement of the scraper 30 can reduce the accumulation of materials on the inner wall to improve the stirring effect.

[0088] In some embodiments, please refer to Figure 3The surface of the scraper 30 facing the inner wall is provided with a wear-resistant layer 40, and the wear-resistant layer 40 is arranged close to the inner wall.

[0089] The thickness of the wear-resistant layer 40 includes but is not limited to 0-3 mm. The scraper 30 is spaced apart from the inner wall, and a wear-resistant layer 40 is disposed between the scraper 30 and the inner wall to fill the gap between the scraper 30 and the inner wall to reduce the amount of material sticking to the inner wall.

[0090] Compared with the structure in which the scraper 30 is in contact with the inner wall, the wear of the scraper 30 can be reduced and the service life of the scraper 30 can be extended.

[0091] In some embodiments, the wear-resistant layer 40 includes but is not limited to any one of a polyurethane layer, a polyethylene layer, a polytetrafluoroethylene layer and a tungsten carbide layer, thereby reducing the wear of the wear-resistant layer 40 .

[0092] In some embodiments, please refer to Figure 3 The stirring device 100 also includes a first driving mechanism 50, which is drivingly connected to the scraper 30 and is used to drive the scraper 30 to rotate relative to the stirring tank 20. The axis of rotation of the scraper 30 relative to the stirring tank 20 coincides with or is parallel to the axis of the stirring tank 20.

[0093] Optionally, the first driving mechanism 50 includes a first motor, and the first motor drives the scraper 30 in transmission connection.

[0094] In other examples, the first driving mechanism 50 further includes a transmission component, which includes but is not limited to a reducer, a chain transmission structure, a gear transmission mechanism or a pulley transmission mechanism, and the first motor is connected to the scraper 30 through the transmission component.

[0095] The first driving mechanism 50 drives the scraper 30 to rotate, which saves more manpower compared with the manual driving method.

[0096] In some embodiments, please refer to Figure 3 The stirring tank 20 includes a tank body 21 and an end cover 22. A cavity is formed inside the tank body 21. An opening communicating with the cavity is formed at one end of the tank body 21. The end cover 22 covers the opening and is openably connected to the tank body 21. The end cover 22 and the tank body 21 together define a stirring chamber. The scraper 30 is rotatably connected to the end cover 22. The wall of the bottom of the tank body 21 forms a bottom wall 216 of the stirring tank 20. The inner peripheral surface of the tank body 21 forms at least a portion of the inner wall.

[0097] The openable and closable connection between the end cover 22 and the tank body 21 refers to a connection in which the end cover 22 can open or close the tank body 21 .

[0098] Exemplarily, the end cover 22 is connected to the tank body 21 by bolts or screws.

[0099] Exemplarily, the first side of the end cover 22 is hinged to the tank body 21, and the connection between the second side of the end cover 22 and the tank body 21 includes but is not limited to a snap connection, a bolt connection or a screw connection, etc. The first side and the second side can be opposite sides of the end cover 22.

[0100] The scraper 30 is arranged on the end cover 22, and after the end cover 22 is separated from the tank body 21, it is convenient to clean the material on the inner wall of the tank body 21 after loading and stirring. In other examples, the end cover 22 and the tank body 21 can be set as an integral structure, and the bottom wall 216 and the tank body 21 are openably connected.

[0101] In some embodiments, please refer to Figure 3 The stirring device 100 further includes a second driving mechanism 60 , which is drivingly connected to the stirring shaft 11 , and is used to drive the stirring shaft 11 to rotate relative to the stirring tank 20 .

[0102] Exemplarily, the second driving mechanism 60 includes a second motor, which is in driving connection with the stirring shaft 11. Further optionally, the second driving mechanism 60 also includes a second transmission component, through which the second motor is in driving connection with the stirring shaft 11. The second transmission component includes but is not limited to one of a reducer, a chain transmission structure, a gear transmission mechanism or a pulley transmission mechanism.

[0103] Compared with manually rotating the stirring shaft 11 , the provision of the second driving mechanism 60 saves more manpower.

[0104] In some embodiments, please refer to Figure 3 An annular cavity 215 surrounding the axis of the stirring tank 20 is formed inside the side wall of the stirring tank 20, and a heat exchange medium inlet 212 and a heat exchange medium outlet 213 are formed on the outer surface of the stirring tank 20. The heat exchange medium inlet 212 and the heat exchange medium outlet 213 are respectively connected to the annular cavity 215, and the two are arranged at an interval.

[0105] Heat exchange medium can be introduced into the heat exchange medium inlet 212 through a pipeline and flow out from the heat exchange medium outlet 213. The heat exchange medium can be, but is not limited to, oil or water.

[0106] The heat exchange medium is introduced into the heat exchange medium inlet 212 and flows out from the heat exchange medium outlet 213 , so that the material in the stirring tank 20 can be cooled to reduce the temperature of the material during the stirring process.

[0107] In some embodiments, please refer to Figure 3 The side wall or bottom wall 216 of the mixing tank 20 is formed with a discharge port 214. Thus, discharge is convenient.

[0108] For the convenience of description, the following embodiments are described by taking a battery production system according to some embodiments of the present application as an example.

[0109] The battery production system comprises the stirring device 100 of the above embodiment, and the stirring device 100 is used to stir the slurry of the battery pole piece.

[0110] Since the battery production system includes all the technical features of the stirring device 100 of the above embodiment, the effects thereof are the same as those of the stirring device 100 and will not be described in detail here.

[0111] In an optional embodiment of the stirring device 100, please refer to Figure 3-Figure 5The stirring device 100 includes a stirring tank 20, a scraper 30, a bottom plate 70, a filter screen 80, a first driving mechanism 50, a second driving mechanism 60 and the stirring blade assembly 10 of the above embodiment. The stirring blade assembly 10 includes a stirring shaft 11, a first stirring blade 12, a second stirring blade 13 and at least one third stirring blade 14. The first stirring blade 12, the second stirring blade 13 and the third stirring blade 14 are respectively connected to the stirring shaft 11 and are arranged at intervals along the axial direction of the stirring shaft 11. At least one third stirring blade 14 is located between the first stirring blade 12 and the second stirring blade 13. Along the circumferential direction of the stirring shaft 11, the distances between multiple points on the surface of the first stirring blade 12 facing the third stirring blade 14 and the first plane are increasing or decreasing. The surface of the second stirring blade 13 away from the first stirring blade 12 is formed with a folding surface 1321. Along the radial inward direction of the stirring shaft 11, the distances between multiple points on the folding surface 1321 and the first plane are decreasing. The first plane is perpendicular to the axis of the stirring shaft 11 and is located between the first stirring blade 12 and the third stirring blade 14. The folding surface 1321 is a concave arc surface. The third stirring blade 14 coincides with or is parallel to the first plane. The stirring tank 20 includes a tank body 21 and an end cover 22. A cavity is formed inside the tank body 21. An opening communicating with the cavity is formed at one end of the tank body 21. The end cover 22 is disposed on the opening and is openably connected to the tank body 21. The end cover 22 and the tank body 21 together define a stirring chamber. The stirring blade assembly 10 is disposed in the stirring chamber. The stirring shaft 11 is rotatably connected to the wall at the bottom of the stirring tank 20, and the first stirring blade 12 is located between the third stirring blade 14 and the bottom wall 216. The second driving mechanism 60 is drivingly connected to the stirring shaft 11. The second driving mechanism 60 is used to drive the stirring shaft 11 to rotate relative to the stirring tank 20. The bottom plate 70 is arranged in the stirring chamber and is spaced from the bottom wall 216. A plurality of blowing holes 71 are formed on the surface of the bottom plate 70 facing the bottom wall 216. The blowing holes 71 penetrate the bottom plate 70 along the thickness direction of the bottom plate 70. An air inlet 211 is formed on the outer surface of the bottom wall 216. The air inlet 211 is connected to the stirring chamber through the blowing holes 71. An exhaust port 221 is formed on the top wall of the stirring tank 20. The exhaust port 221 is connected to the stirring chamber. A filter screen 80 is arranged between the bottom plate 70 and the bottom wall 216. The end cover 22 forms the top wall of the stirring tank 20. The scraper 30 is located in the stirring chamber and is rotatably connected to the stirring tank 20. The surface of the scraper 30 facing the inner wall is provided with a wear-resistant layer 40, and the wear-resistant layer 40 is arranged close to the inner wall. The first driving mechanism 50 is drivingly connected to the scraper 30, and is used to drive the scraper 30 to rotate relative to the stirring tank 20. The axis of rotation of the scraper 30 relative to the stirring tank 20 coincides with or is parallel to the axis of the stirring tank 20. The thickness of the wear-resistant layer 40 is between 0-3 mm.An annular cavity 215 surrounding the axis of the stirring tank 20 is formed inside the side wall of the stirring tank 20, and a heat exchange medium inlet 212 and a heat exchange medium outlet 213 are formed on the outer surface of the stirring tank 20. The heat exchange medium inlet 212 and the heat exchange medium outlet 213 are respectively connected to the annular cavity 215 and are arranged at an interval.

[0112] When the stirring shaft 11 rotates, the first stirring blade 12 stirs the material and can lift at least part of the material, so that part of the agglomerated material is further stirred in the stirring zone between the second stirring blade 13 and the third stirring blade 14, and the other part of the agglomerated material passes over the second stirring blade 13. In the process of the material falling back, the movement trajectory of the material can be changed by colliding with the folding surface 1321 to reduce the amount of material falling back to the stirring zone, so that part of the material is bounced to the side wall of the stirring tank 20, and falls from the side wall to the bottom wall 216, and is stirred under the action of the first stirring blade 12 to reduce the probability of the agglomerated material being directly mixed into the stirring zone between the second stirring blade 13 and the third stirring blade 14, so that the agglomerated material is first initially stirred by the first stirring blade 12 and then enters the stirring zone, so that the material is stirred more evenly. The gas is introduced into the stirring chamber through the air inlet, so that the material accumulated in the dead corner of the stirring chamber can be blown away; the scraper 30 can reduce the accumulation of material on the inner wall to improve the stirring effect. The heat exchange medium is introduced into the heat exchange medium inlet 212 and flows out from the heat exchange medium outlet 213 , so that the material in the stirring tank 20 can be cooled to reduce the temperature of the material during the stirring process.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A stirring blade assembly, characterized in that: include: Stirring shaft; A first stirring blade, a second stirring blade and at least one third stirring blade, wherein the first stirring blade, the second stirring blade and the third stirring blade are respectively connected to the stirring shaft and are spaced apart along the axial direction of the stirring shaft, wherein the at least one third stirring blade is located between the first stirring blade and the second stirring blade, and along the circumferential direction of the stirring shaft, the distances between multiple points on the surface of the first stirring blade facing the third stirring blade and a first plane are increasing or decreasing, and a folding surface is formed on the surface of the second stirring blade facing away from the first stirring blade, and along the radially inward direction of the stirring shaft, the distances between multiple points on the folding surface and the first plane are decreasing, and the first plane is perpendicular to the axis of the stirring shaft and is located between the first stirring blade and the third stirring blade.

2. The stirring blade assembly according to claim 1, characterized in that: The folding surface comprises a concave arc surface.

3. The stirring blade assembly according to claim 1, characterized in that: The second stirring blade includes a first part and a second part, the first part is connected to the stirring shaft, the second part is connected to the first part and is arranged at an angle with the first part, the angle between the second part and the first part is greater than 90° and less than 180°, and the surface of the second part facing away from the first stirring blade forms at least part of the folding surface.

4. The stirring blade assembly according to any one of claims 1 to 3, characterized in that: There are multiple first stirring blades, and the multiple first stirring blades are arranged at intervals along the circumferential direction of the stirring shaft. The surface of the first stirring blade facing the third stirring blade forms a first surface, and along the circumferential direction of the stirring shaft, the first surfaces of any two adjacent first stirring blades face the same direction.

5. The stirring blade assembly according to any one of claims 1 to 3, characterized in that: The third stirring blade coincides with or is parallel to the first plane.

6. A stirring device, characterized in that: include: A stirring tank, wherein a stirring chamber is formed inside the stirring tank; The stirring blade assembly as described in claims 1-5 is arranged in the stirring chamber, the stirring shaft is rotatably connected to the stirring tank, and the first stirring blade is located between the third stirring blade and the bottom wall of the stirring tank.

7. The stirring device according to claim 6, characterized in that: The stirring device also includes a bottom plate, which is arranged in the stirring chamber and spaced apart from the bottom wall. A plurality of blowing holes are formed on the surface of the bottom plate facing the bottom wall, and the blowing holes penetrate the bottom plate along the thickness direction of the bottom plate. An air inlet is formed on the outer surface of the bottom wall, and the air inlet is connected to the stirring chamber through the blowing holes. An exhaust port is formed on the top wall of the stirring tank, and the exhaust port is connected to the stirring chamber.

8. The stirring device according to claim 7, characterized in that: The stirring device further comprises a filter screen, and the filter screen is arranged between the bottom plate and the bottom wall.

9. The stirring device according to claim 6, characterized in that: The stirring device also includes a scraper, which is located in the stirring chamber and is rotatably connected to the stirring tank. The scraper is used to scrape materials on the inner wall of the stirring tank.

10. The stirring device according to claim 9, characterized in that: A wear-resistant layer is arranged on the surface of the scraper facing the inner wall, and the wear-resistant layer is arranged close to the inner wall.

11. The stirring device according to claim 10, characterized in that: The wear-resistant layer includes any one of a polyurethane layer, a polyethylene layer, a polytetrafluoroethylene layer and tungsten carbide.

12. The stirring device according to claim 9, characterized in that: The stirring device also includes a first driving mechanism, which is drivingly connected to the scraper and is used to drive the scraper to rotate relative to the stirring tank. The axis of rotation of the scraper relative to the stirring tank coincides with or is parallel to the axis of the stirring tank.

13. The stirring device according to claim 9, characterized in that: The stirring tank includes a tank body and an end cover, a cavity is formed inside the tank body, an opening connected to the cavity is formed at one end of the tank body, the end cover is covered on the opening and is openably connected to the tank body, the end cover and the tank body together define the stirring chamber, the scraper is rotatably connected to the end cover, the wall of the bottom of the tank body forms the bottom wall, and the inner circumferential surface of the tank body forms at least a portion of the inner wall.

14. The stirring device according to any one of claims 6 to 13, characterized in that: The stirring device further comprises a second driving mechanism, which is drivingly connected to the stirring shaft and is used to drive the stirring shaft to rotate relative to the stirring tank.

15. The stirring device according to any one of claims 6 to 13, characterized in that: An annular cavity surrounding the axis of the stirring tank is formed inside the side wall of the stirring tank, and a heat exchange medium inlet and a heat exchange medium outlet are formed on the outer surface of the stirring tank. The heat exchange medium inlet and the heat exchange medium outlet are respectively connected to the annular cavity and are spaced apart. And / or, a discharge port is formed on the side wall or the bottom wall of the stirring tank.

16. A battery production system, characterized in that: It comprises a stirring device as described in any one of claims 6 to 15, wherein the stirring device is used to stir the slurry of the battery electrode.

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