Slurry stirring equipment

Abstract

The slurry stirring equipment comprises a tank body, a stirring paddle and a driving part, the tank body comprises a stirring space, a feeding port and a discharging port, the stirring paddle is arranged in the stirring space and comprises a stirring shaft, a stirring frame, a first propeller blade and a second propeller blade, the stirring shaft is arranged in the height direction of the tank body, and the driving part is arranged in the stirring space. The stirring frame is connected to the stirring shaft and synchronously rotates along with the stirring shaft, the first propeller blade and the second propeller blade are connected to the stirring frame, the stirring diameter of the first propeller blade is larger than that of the second propeller blade, the driving part comprises a driving shaft in transmission connection with the stirring shaft, and when the driving shaft rotates in the first direction, the stirring shaft rotates in the second direction. When the slurry moves from bottom to top and rotates in the second direction, the slurry moves from top to bottom, so that the fluidity of the slurry is improved, the slurry retention condition is reduced, and the problem that the slurry becomes dry due to slurry retention is solved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a slurry mixing device. Background Technology

[0002] With the development of new energy sources, more and more fields are adopting new energy as a power source. Due to its advantages such as high energy density, rechargeability, safety, and environmental friendliness, battery devices are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0003] The battery assembly includes a housing, a heat exchange component, and multiple battery cells, with the battery cells and heat exchange component each housed within the housing. Each battery cell includes an electrode plate coated with a slurry; the slurry coating provides the battery cell with active materials.

[0004] In related technologies, the slurry needs to be stirred in a buffer tank before coating. When there are many solid particles in the slurry, the yield of the battery cells will decrease. Utility Model Content

[0005] In view of the above problems, this application provides a slurry mixing equipment, a slurry mixing method and a battery production line, which solves the problem of increased solid particles caused by the drying of the slurry during the existing slurry mixing process.

[0006] The first aspect of this application discloses a slurry mixing device, which includes:

[0007] The tank body includes a mixing space, a feed inlet, and a discharge outlet, with the feed inlet and discharge outlet respectively connected to the mixing space.

[0008] The stirring paddle is rotatably positioned within the stirring space. It includes a stirring shaft, a stirring frame, a first propeller blade, and a second propeller blade. The stirring shaft is positioned along the height of the tank. The stirring frame is connected to the stirring shaft and rotates synchronously with it. The first and second propeller blades are respectively connected to the stirring frame and are positioned around the stirring shaft. Along the radial direction of the stirring shaft, the stirring diameter of the first propeller blade is larger than that of the second propeller blade. Along the axial direction of the stirring shaft, the distance between the stirring frame and the inner bottom surface of the stirring space is between 0 and 2 cm. Along the radial direction of the stirring shaft, the minimum distance between the first propeller blade and the inner peripheral wall of the stirring space is between 0 and 2 cm.

[0009] The driving component is located outside the mixing space. The driving component includes a driving shaft that is connected to the mixing shaft. The driving shaft can rotate in opposite directions, a first direction and a second direction. When the driving shaft rotates in the first direction, the first propeller blade and the second propeller blade can drive the slurry to move from bottom to top. When it rotates in the second direction, the first propeller blade and the second propeller blade can drive the slurry to move from top to bottom.

[0010] In this application, the mixing equipment allows slurry to enter the tank through the inlet, be agitated by the mixing blade, and then discharged through the outlet to provide slurry for coating. During coating, the mixing blade rotates in a first direction, and the first and second propeller blades drive the slurry from bottom to top. When coating stops, the mixing blade rotates in a second direction, and the first and second propeller blades drive the slurry from top to bottom. By setting the first and second propeller blades, the slurry can be turned upwards, improving its fluidity and reducing slurry retention. This reduces the problem of slurry drying due to retention, resulting in fewer solid particles in the slurry and thus improving the yield of battery cells.

[0011] In some embodiments of this application, the stirring frame includes a first connecting rod and two second connecting rods. The first connecting rod is connected to the stirring shaft and is angled to the stirring shaft. Along the radial direction of the stirring shaft, both ends of the first connecting rod protrude from the stirring shaft. The two second connecting rods are angled to the first connecting rod and are located on opposite sides of the stirring shaft along the radial direction of the stirring shaft. The first propeller blade includes a first connecting portion and a second connecting portion arranged opposite to each other. The first connecting portion is connected to one of the second connecting rods, and the second connecting portion is connected to the other of the second connecting rods. Along the axial direction of the stirring shaft, the first connecting portion and the second connecting portion are spaced apart.

[0012] In this application, a first connecting rod is connected to a stirring shaft, two second connecting rods are respectively connected to the first connecting rod, and a first propeller blade is connected to the two second connecting rods respectively, so that the first propeller blade is inclined relative to the stirring shaft, so that when the stirring shaft rotates in the first direction, the first propeller blade can drive the slurry to move from bottom to top, and when the stirring shaft rotates in the second direction, the first propeller blade can drive the slurry to move from top to bottom, thereby improving the fluidity of the slurry, reducing the slurry retention, and thus reducing the problem of the slurry drying out due to slurry retention.

[0013] In some embodiments of this application, the first connecting rod is connected to the bottom end of the stirring shaft and is perpendicular to the stirring shaft, with the first connecting rod symmetrically arranged relative to the stirring shaft. When the drive shaft drives the first connecting rod to rotate, the first connecting rod can simultaneously stir the slurry. By vertically connecting the first connecting rod to the bottom of the stirring shaft, the first connecting rod is positioned close to the bottom of the stirring space, thereby enabling stirring of the slurry at the bottom of the stirring space and further improving the uniformity of slurry stirring. Simultaneously, the first connecting rod can uniformly stir both sides of the stirring shaft in the radial direction, thereby further improving the uniformity of slurry stirring.

[0014] In some embodiments of this application, the stirring shaft and two second connecting rods are located on the same side of the first connecting rod, with the two second connecting rods parallel to the stirring shaft. This arrangement ensures that the side of the first connecting rod facing the stirring space is flush with the shaft, allowing it to be positioned close to the inner bottom surface of the stirring space, thereby improving the stirring effect of the first connecting rod on the slurry at the bottom of the stirring space. Simultaneously, when the stirring shaft rotates, the first connecting rod drives the two second connecting rods to rotate around the stirring shaft, enabling the two second connecting rods to stir the slurry in the vertical direction. Positioning the two second connecting rods parallel to the stirring shaft further enhances the vertical stirring effect of the slurry.

[0015] In some embodiments of this application, the first propeller blade is a first plate-shaped member, which includes a first surface and a second surface arranged opposite to each other. The first surface and the second surface are respectively connected to two second connecting rods to form a spiral structure. The portion of the first propeller blade located between the first connecting portion and the second connecting portion protrudes towards one side of the inner peripheral wall of the stirring space. The first propeller blade has a first projection on the inner bottom surface of the stirring space, which is a first semi-circular ring structure. By connecting the first surface and the second surface of the first plate-shaped member to different second connecting rods, the first plate-shaped member can form a spiral structure, thereby forming the first propeller blade. Under the drive of the stirring shaft, it can drive the slurry to move from bottom to top or from top to bottom, thereby improving the fluidity of the slurry and reducing the situation of slurry stagnation and drying. At the same time, the first propeller blade can increase the stirring area in the radial direction of the stirring shaft, thereby further improving the stirring effect on the slurry.

[0016] In some embodiments of this application, there are two first propeller blades. Along the radial direction of the stirring shaft, the two first propeller blades are connected to opposite sides of a second connecting rod, and the first connecting portion of one first propeller blade is connected to the first connecting portion of the other first propeller blade on different second connecting rods. This arrangement allows for the provision of first propeller blades on opposite sides of the stirring shaft, thereby improving the stirring capacity of the slurry and thus enhancing the stirring effect.

[0017] In some embodiments of this application, the stirring frame further includes a third connecting rod, which is connected to the stirring shaft and angled to it. The third connecting rod is spaced above the first connecting rod and protrudes from the stirring shaft at both ends along its radial direction. The second propeller blade includes a first part and a second part arranged opposite to each other. One of the first part and the second part is connected to the protruding part of the first connecting rod, and the other part is connected to the protruding part of the third connecting rod. The first part and the second part are located on opposite sides of the stirring shaft along its radial direction, and spaced apart along its axial direction. The third connecting rod is vertically connected to the stirring shaft and is symmetrically arranged relative to the stirring shaft.

[0018] A third connecting rod is provided, connecting the second propeller blade to both the third and first connecting rods. Along the radial direction of the stirring shaft, the second propeller blade is positioned inside the first propeller blade. During slurry mixing, the first and second propeller blades stir the slurry at different locations along the radial direction of the stirring shaft. This increases the number of mixing points, further improving the uniformity of the slurry, reducing air bubbles, and ultimately increasing the yield of battery cells.

[0019] When the drive shaft drives the third link to rotate, the third link can simultaneously stir the slurry. By vertically connecting the third link to the stirring shaft and symmetrically setting it relative to the stirring shaft, the third link can uniformly stir both sides of the stirring shaft in the radial direction, thereby further improving the uniformity of the slurry stirring.

[0020] In some embodiments of this application, the second propeller blade is a second plate-shaped member, which includes a first surface and a second surface arranged opposite to each other. One of the first surface and the second surface is connected to the portion of the first connecting rod protruding from the stirring shaft, and the other of the first surface and the second surface is connected to the portion of the third connecting rod protruding from the stirring shaft, so that the second plate-shaped member forms a spiral structure. The portion of the second propeller blade located between the first portion and the second portion protrudes towards one side of the inner peripheral wall of the stirring space. The second propeller blade has a second projection on the inner bottom surface of the stirring space, and the second projection is a second semi-circular ring structure.

[0021] By connecting the first and second surfaces of the second plate-shaped member to the first and third connecting rods respectively, the second plate-shaped member can form a spiral structure, thereby forming a second propeller blade. Driven by the stirring shaft, this propeller blade can drive the slurry to move from bottom to top or from top to bottom, improving the slurry's fluidity and reducing slurry stagnation and drying. Simultaneously, the second propeller blade increases the stirring area in the radial direction of the stirring shaft, further enhancing the stirring effect on the slurry.

[0022] In some embodiments of this application, there are two second propeller blades. Along the radial direction of the stirring shaft, the two second propeller blades are connected to opposite sides of the third connecting rod. Along the radial direction of the stirring shaft, the first part of one second propeller blade and the first part of the other second propeller blade are positioned on opposite sides of the stirring shaft. This arrangement allows for second propeller blades to be provided on both opposite sides of the stirring shaft, thereby improving the stirring capacity of the slurry and thus enhancing the stirring effect.

[0023] In some embodiments of this application, the stirring space includes a minimum liquid level, which is flush with the top of the stirring frame along the axial direction of the stirring shaft, and the ratio of the minimum liquid level to the height of the stirring space is in the range of 0.6 to 0.8. This arrangement allows the stirring paddle to provide sufficient dimensions for the stirring frame in the axial direction of the stirring shaft, thereby improving the stirring capacity of the slurry and enhancing its uniformity.

[0024] In some embodiments of this application, the ratio of the lowest liquid level to the height of the stirring space along the axial direction of the stirring shaft is in the range of 0.6 to 0.7. This setting makes the size of the stirring frame in the axial direction of the stirring shaft moderate, reducing the situation where slurry is stuck at the top edge of the stirring space during the stirring process, further reducing the situation of slurry drying due to slurry retention, and thus reducing the number of solid particles in the slurry.

[0025] In some embodiments of this application, the rotational speed of the stirring shaft is in the range of 5 rpm to 25 rpm. This setting allows the stirring paddle to uniformly stir the slurry, thereby effectively improving the homogeneity of the slurry.

[0026] In some embodiments of this application, the rotational speed of the stirring shaft is in the range of 6 to 10 revolutions per minute. This setting allows the stirring paddle to effectively stir the slurry while effectively reducing energy consumption.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of a slurry mixing device according to one embodiment of this application is shown.

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of the mixing blade of the slurry mixing equipment shown in the figure;

[0030] Figure 3 for Figure 2 Left view of the stirring paddle shown;

[0031] Figure 4 for Figure 2 A top view of the stirring paddle shown;

[0032] Figure 5 for Figure 1 The diagram shows the slurry mixing method using the slurry mixing equipment shown.

[0033] The attached figures are labeled as follows:

[0034] 100. Slurry mixing equipment;

[0035] 10. Tank body;

[0036] 11. Mixing space; 12. Feed inlet; 13. Discharge outlet; 14. Return outlet; 15. Minimum liquid level;

[0037] 20. Stirring paddle;

[0038] 21. Stirring shaft; 22. Stirring frame; 221. First connecting rod; 222. Second connecting rod; 223. Third connecting rod; 23. First propeller blade; 231. First connecting part; 232. Second connecting part; 24. Second propeller blade; 241. First part; 242. Second part;

[0039] 30. Driving components;

[0040] 40. Support frame;

[0041] X, radial direction; Y, axial direction; a, first distance; b, second distance; M, first direction; N, second direction; L1, first diameter; L2, second diameter. Detailed Implementation

[0042] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0048] In the description of the embodiments of this application, the technical 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0051] The battery assembly includes a housing, a heat exchange component, and multiple battery cells, with the battery cells and heat exchange component each housed within the housing. Each battery cell includes an electrode plate coated with a slurry; the slurry coating provides the battery cell with active materials.

[0052] In related technologies, the slurry needs to be stirred in a buffer tank before coating to improve the uniformity of the slurry. However, during the stirring process, the slurry is prone to drying out due to slurry retention. The drying of the slurry will lead to an increase in solid particles in the slurry, and the increase in solid particles will reduce the yield of battery cells.

[0053] In this application, the slurry mixing equipment includes a tank, a mixing paddle, and a drive unit. The tank includes a mixing space, a feed inlet, and a discharge outlet. The feed inlet and discharge outlet are respectively connected to the mixing space. The mixing paddle is rotatably disposed within the mixing space and includes a mixing shaft, a mixing frame, a first propeller blade, and a second propeller blade. The mixing shaft is arranged along the height direction of the tank. The mixing frame is connected to the mixing shaft and rotates synchronously with the mixing shaft. The first propeller blade and the second propeller blade are respectively connected to the mixing frame and are respectively arranged around the mixing shaft. Along the radial direction of the mixing shaft, the mixing diameter of the first propeller blade is larger than that of the second propeller blade. The drive unit is disposed outside the mixing space and includes a drive shaft that is drively connected to the mixing shaft. The drive shaft can rotate in opposite directions, a first direction and a second direction. When the drive shaft rotates in the first direction, the first propeller blade and the second propeller blade can drive the slurry to move from bottom to top. When it rotates in the second direction, the first propeller blade and the second propeller blade can drive the slurry to move from top to bottom. By setting up a first propeller blade and a second propeller blade, the slurry can be turned upwards, which improves the fluidity of the slurry and reduces the slurry retention. This reduces the problem of the slurry drying out due to slurry retention, thereby reducing the number of solid particles in the slurry and improving the yield of battery cells.

[0054] like Figures 1 to 4As shown, in some embodiments of this application, a slurry mixing device 100 is proposed. The slurry mixing device 100 includes a tank 10, a mixing paddle 20, and a drive unit 30. The tank 10 includes a mixing space 11, a feed inlet 12, and a discharge outlet 13. The feed inlet 12 and the discharge outlet 13 are respectively connected to the mixing space 11. The mixing paddle 20 is rotatably disposed in the mixing space 11. The mixing paddle 20 includes a mixing shaft 21, a mixing frame 22, a first propeller blade 23, and a second propeller blade 24. The mixing shaft 21 is arranged along the height direction of the tank 10. The mixing frame 22 is connected to the mixing shaft 21 and rotates synchronously with the mixing shaft 21. The first propeller blade 23 and the second propeller blade 24 are... The first propeller blade 23 and the second propeller blade 24 are respectively connected to the stirring frame 22 and are arranged around the stirring shaft 21. Along the radial direction X of the stirring shaft 21, the stirring diameter of the first propeller blade 23 is larger than that of the second propeller blade 24. The driving member 30 is located outside the stirring space 11. The driving member 30 includes a driving shaft that is connected to the stirring shaft 21. The driving shaft can rotate in opposite directions, a first direction M and a second direction N. When the driving shaft rotates in the first direction M, the first propeller blade 23 and the second propeller blade 24 can drive the slurry to move from bottom to top. When it rotates in the second direction N, the first propeller blade 23 and the second propeller blade 24 can drive the slurry to move from top to bottom.

[0055] Specifically, the first propeller blade 23 includes a helical structure along its length, is arranged circumferentially around the stirring shaft 21, and is inclined relative to the stirring shaft 21. The two ends of the first propeller blade 23 are spaced apart along the axial direction Y of the stirring shaft 21. The second propeller blade 24 also includes a helical structure along its length, is arranged circumferentially around the stirring shaft 21, and is inclined relative to the stirring shaft 21. The two ends of the second propeller blade 24 are also spaced apart along the axial direction Y of the stirring shaft 21.

[0056] The first propeller blade 23 rotates in the same direction as the second propeller blade 24, so that when the stirring shaft 21 drives the first propeller blade 23 and the second propeller blade 24, the first propeller blade 23 and the second propeller blade 24 can simultaneously drive the slurry to move from bottom to top or from top to bottom.

[0057] When the stirring shaft 21 drives the first propeller blade 23 and the second propeller blade 24 to rotate through the stirring frame 22, the first propeller blade 23 forms a first stirring circumference along the circumferential direction of the stirring shaft 21. The diameter of the first stirring circumference is a first diameter L1. The second propeller blade 24 forms a second stirring circumference. The diameter of the second stirring circumference is a second diameter L2. The first stirring circumference is located radially outside the second stirring circumference, and the first diameter L1 is greater than the second support, so that the stirring diameter of the first propeller blade 23 is greater than the stirring diameter of the second propeller blade 24.

[0058] The drive shaft of the drive unit 30 can rotate along a first direction M or a second direction N, wherein the first direction M and the second direction N are opposite, for example, the first direction M is clockwise and the second direction N is counterclockwise, or the first direction M is counterclockwise and the second direction N is clockwise.

[0059] In this application, the mixing equipment allows slurry to enter the tank 10 through the inlet 12, be agitated by the mixing paddle 20, and then be discharged through the outlet 13 to provide slurry for coating. During coating, the mixing paddle 20 rotates in the first direction M, and the first propeller blade 23 and the second propeller blade 24 drive the slurry from bottom to top. When coating stops, the mixing paddle 20 rotates in the second direction N, and the first propeller blade 23 and the second propeller blade 24 drive the slurry from top to bottom. By setting the first propeller blade 23 and the second propeller blade 24, the slurry can be turned upwards, improving its fluidity and reducing slurry retention. This reduces the problem of slurry drying due to retention, resulting in a reduction of solid particles in the slurry and thus improving the yield of battery cells.

[0060] It should be understood that when the drive shaft of the drive unit 30 rotates along the first direction M, the first propeller blade 23 and the second propeller blade 24 drive the slurry to move from bottom to top, thereby realizing the upward operation of the slurry and thus improving the fluidity of the slurry.

[0061] When the drive shaft of the drive unit 30 rotates along the second direction N, the first propeller blade 23 and the second propeller blade 24 drive the slurry to move from top to bottom, thereby realizing the downward pressure operation on the slurry, which in turn can maintain the viscosity of the slurry and improve the manufacturability, stability and consistency of the slurry.

[0062] In addition, when the slurry is stirred by the stirring paddle 20 in the stirring space 11, the stirring paddle 20 agitates the slurry, thereby separating the gas doped in the slurry from the slurry, thus reducing the amount of gas doped in the slurry. When coating the electrode of the battery cell, the coating quality can be improved, thereby increasing the yield of the battery cell.

[0063] In this application, when the slurry is stirred, the stirring frame 22, the first propeller blade 23, and the second propeller blade 24 are all immersed in the interior of the slurry. This reduces the possibility that the stirring frame 22, the first propeller blade 23, and the second propeller blade 24 protrude from the slurry surface, causing the slurry to remain on the protruding parts and dry out. This, in turn, reduces the possibility of an increase in solid particles in the slurry due to the slurry drying out.

[0064] It should be noted that in this application, the mixing equipment also includes a support frame 40, which is set on the ground at the working position. The tank 10 is fixed on the support frame 40, and the support frame 40 provides support for the tank 10, so that the tank 10 is spaced apart from the ground at the working position, so as to arrange the pipeline of the tank 10.

[0065] In addition, in this application, the tank body 10 includes a tank body and a top cover. A stirring space 11 with an opening is formed on the tank body. The top cover is detachably connected to the tank body to close the opening of the stirring space 11. The drive unit 30 can be set on the top cover or can be set at equal intervals above the top cover by a support structure. One end of the stirring shaft 21 passes through the top cover and is connected to the drive shaft of the drive unit 30 for transmission (the stirring shaft 21 is provided with a sealing structure at the point of protrusion from the top cover to reduce the situation where foreign objects enter the stirring space 11 through the protrusion point), so as to reduce the situation where dust generated during the operation of the drive unit 30 falls into the stirring space 11 and contaminates the slurry.

[0066] Furthermore, in this application, the top cover is fastened to the top of the tank body. The top cover and the tank body can be sealed (with an independent venting structure) or not sealed (to allow venting during the mixing process). The connection between the top cover and the tank body includes, but is not limited to, snap-fit ​​or connection via connectors (bolts or clips, etc.). Additionally, an observation window (such as a glass window) can be provided on the top cover to view the conditions of the mixing space 11, thereby facilitating control of the slurry mixing process.

[0067] In some embodiments of this application, such as Figures 1 to 3As shown, the stirring frame 22 includes a first connecting rod 221 and two second connecting rods 222. The first connecting rod 221 is connected to the stirring shaft 21 and is set at an angle to the stirring shaft 21. Along the radial direction X of the stirring shaft 21, the two ends of the first connecting rod 221 protrude from the stirring shaft 21. The two second connecting rods 222 are respectively connected to the first connecting rod 221 at an angle. Along the radial direction X of the stirring shaft 21, the two second connecting rods 222 are located on opposite sides of the stirring shaft 21. The first propeller blade 23 includes a first connecting part 231 and a second connecting part 232 arranged oppositely. The first connecting part 231 is connected to one second connecting rod 222, and the second connecting part 232 is connected to the other second connecting rod 222. Along the axial direction Y of the stirring shaft 21, the first connecting part 231 and the second connecting part 232 are spaced apart.

[0068] Specifically, the first connecting rod 221 is connected to the stirring shaft 21, and the first connecting rod 221 and the stirring shaft 21 are intersected. The included angle between the first connecting rod 221 and the stirring shaft 21 is greater than 0 degrees and less than or equal to 180 degrees (for example, it can be 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, 160 degrees, or 170 degrees). The first connecting rod 221 and the stirring shaft 21 can be in a T-shape or a cross-shaped structure.

[0069] On opposite sides of the radial direction X of the stirring shaft 21, the two ends of the first connecting rod 221 protrude from the stirring shaft 21 respectively, and a second connecting rod 222 is connected to each protrusion. The first connecting part 231 and the second connecting part 232 of the first propeller blade 23 are respectively connected to the two second connecting rods 222. The first connecting part 231 and the second connecting part 232 are spaced apart in the axial direction Y of the stirring shaft 21, and the first connecting part 231 and the second connecting part 232 are spaced apart from the stirring shaft 21 along the radial direction X of the stirring shaft 21, so that the first propeller blade 23 is inclined relative to the stirring shaft 21, so that when the stirring shaft 21 rotates in the first direction M, the first propeller blade 23 can drive the slurry to move from bottom to top, and when the stirring shaft 21 rotates in the second direction N, the first propeller blade 23 can drive the slurry to move from top to bottom, thereby improving the fluidity of the slurry, reducing the slurry retention, and thus reducing the problem of the slurry drying out due to slurry retention.

[0070] It should be understood that when the stirring shaft 21 drives the first connecting rod 221 and the two second connecting rods 222 to rotate synchronously, the first connecting rod 221 and the two second connecting rods 222 also synchronously stir the slurry to improve the uniformity of the slurry.

[0071] In addition, the shape of the radial section of the first link 221 includes, but is not limited to, a circle, an ellipse or a polygon, while the shape of the radial section of the second link includes, but is not limited to, a circle, an ellipse or a polygon.

[0072] It should be noted that the connection between the first connecting rod 221 and the stirring shaft 21 includes, but is not limited to, welding, bonding, snap-fitting, or connection via a connector.

[0073] In addition, the connection methods between the second link 222 and the first link 221 include, but are not limited to, welding, bonding, snap-fitting, or connection via connectors.

[0074] In some embodiments of this application, such as Figures 1 to 3 As shown, the first connecting rod 221 is connected to the bottom end of the stirring shaft 21 (the end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11).

[0075] Specifically, the stirring shaft 21 is arranged along the height direction of the stirring space 11, and one end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11 is positioned close to the inner bottom surface of the stirring shaft 21. The first connecting rod 221 is vertically connected to the end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. When the drive shaft drives the first connecting rod 221 to rotate, the first connecting rod 221 can simultaneously stir the slurry. By vertically connecting the first connecting rod 221 to the bottom of the stirring shaft 21, the first connecting rod 221 is positioned close to the bottom of the stirring space 11, thereby enabling the stirring of the slurry at the bottom of the stirring space 11 and further improving the uniformity of the slurry stirring.

[0076] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, along the axial direction Y of the stirring shaft 21, the first connecting rod 221 is symmetrically arranged relative to the stirring shaft 21.

[0077] Specifically, the first connecting rod 221 is connected to the end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. The first connecting rod 221 is perpendicularly connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21, forming a T-shape with the stirring shaft 21. This arrangement allows the first connecting rod 221 to uniformly stir both sides of the stirring shaft 21 in the radial direction X, thereby further improving the uniformity of the slurry mixing.

[0078] In addition, the structure formed by the first connecting rod 221 and the stirring shaft 21 can make the stirring frame 22 be subjected to uniform force during the stirring process, reducing the occurrence of stress concentration that causes the stirring frame 22 to deform and affect the slurry stirring effect.

[0079] In some embodiments of this application, such as Figure 1As shown, the distance between the first connecting rod 221 and the inner bottom surface of the stirring space 11 is greater than 0.

[0080] Specifically, the first connecting rod 221 is connected to one end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. The first connecting rod 221 is perpendicularly connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21. The stirring shaft 21 and the first connecting rod 221 form a T-shaped structure. There is a first distance a between the first connecting rod 221 and the inner bottom surface of the stirring space 11, wherein the first distance a is set to be greater than 0.

[0081] This configuration reduces friction between the first connecting rod 221 and the inner bottom surface of the mixing space 11, enabling the first connecting rod 221 to effectively mix the slurry.

[0082] It should be noted that the specific value of the first distance 'a' can be 0.5 cm, 1.5 cm, 2.5 cm, 3.5 cm, 4.5 cm, 5.5 cm, 6.5 cm, or 7.5 cm.

[0083] In some embodiments of this application, such as Figure 1 As shown, the distance between the first connecting rod 221 and the inner bottom surface of the stirring space 11 is in the range of 1 cm to 2 cm.

[0084] Specifically, the first connecting rod 221 is connected to one end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. The first connecting rod 221 is perpendicularly connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21. The stirring shaft 21 and the first connecting rod 221 form a T-shaped structure. There is a first distance a between the first connecting rod 221 and the inner bottom surface of the stirring space 11, wherein the first distance a is set to be greater than or equal to 1 cm and less than or equal to 2 cm.

[0085] This configuration allows the distance between the first connecting rod 221 and the inner bottom surface of the mixing space 11 to be controlled within a better range, thereby improving the mixing effect of the first connecting rod 221 on the slurry at the bottom of the mixing space 11.

[0086] It should be noted that the specific value of the first distance 'a' can be 1 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm, or 2 cm.

[0087] In some embodiments of this application, such as Figures 1 to 3 As shown, the stirring shaft 21 and the two second connecting rods 222 are located on the same side of the first connecting rod 221.

[0088] Specifically, the first connecting rod 221 is connected to the end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. The first connecting rod 221 is perpendicularly connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21. The stirring shaft 21 and the first connecting rod 221 form a T-shaped structure. Two second connecting rods 222 are respectively connected to the first connecting rod 221, and the two second connecting rods 222 are located on opposite sides of the radial direction X of the stirring shaft 21. At the same time, the stirring shaft 21 and the two second connecting rods 222 are arranged on the same side of the first connecting rod 221, so that the side of the first connecting rod 221 facing the stirring space 11 is flush, so that the first connecting rod 221 can be close to the inner bottom surface of the stirring space 11, thereby improving the stirring effect of the first connecting rod 221 on the slurry at the bottom of the stirring space 11.

[0089] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the two second connecting rods 222 are parallel to the stirring shaft 21.

[0090] Specifically, the first connecting rod 221 is connected to one end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. The first connecting rod 221 is perpendicularly connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21. The stirring shaft 21 and the first connecting rod 221 form a T-shaped structure. Two second connecting rods 222 are respectively connected to the first connecting rod 221, and the two second connecting rods 222 are located on opposite sides of the radial direction X of the stirring shaft 21. At the same time, the stirring shaft 21 and the two second connecting rods 222 are arranged on the same side of the first connecting rod 221, so that the stirring shaft 21, the first connecting rod 221 and the two second connecting rods 222 form a mountain-shaped structure.

[0091] With this configuration, when the stirring shaft 21 rotates, the first connecting rod 221 drives the two second connecting rods 222 to rotate around the stirring shaft 21. The two second connecting rods 222 can stir the slurry in the vertical direction. Setting the two second connecting rods 222 to be parallel to the stirring shaft 21 can improve the stirring effect of the slurry in the vertical direction.

[0092] It should be understood that, along the radial direction X of the stirring shaft 21, the connection position between one end of the second connecting rod 222 and the first connecting rod 221 can be located at the end of the first connecting rod 221, or it can be located between the end of the first connecting rod 221 and the stirring shaft 21.

[0093] In this application, as Figure 1 and Figure 2As shown, one end of the second connecting rod 222 is connected to the end of the first connecting rod 221 facing the inner peripheral wall of the mixing space 11 and the two are flush. This arrangement allows the second connecting rod 222 to be positioned close to the inner peripheral wall of the mixing space 11, thereby enabling mixing at the edge of the mixing space 11 and further improving the mixing effect of the slurry.

[0094] In some embodiments of this application, such as Figure 2 As shown, the first propeller blade 23 is a first plate-shaped member. The first plate-shaped member includes a first surface and a second surface arranged opposite to each other. The first surface and the second surface are respectively connected to two second connecting rods 222 so that the first plate-shaped member forms a spiral structure.

[0095] Specifically, the first connecting rod 221 is connected to one end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. The first connecting rod 221 is perpendicularly connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21. The stirring shaft 21 and the first connecting rod 221 form a T-shaped structure. Two second connecting rods 222 are respectively connected to the first connecting rod 221. The two second connecting rods 222 are located on opposite sides of the radial direction X of the stirring shaft 21. The stirring shaft 21 and the two second connecting rods 222 are arranged on the same side of the first connecting rod 221, and the two second connecting rods 222 are parallel and respectively flush with the two ends of the first connecting rod 221, so that the stirring shaft 21, the first connecting rod 221 and the two second connecting rods 222 form a mountain-shaped structure.

[0096] One end of the first plate-shaped member is arranged along the length direction of a second connecting rod 222, and the first surface of the first plate-shaped member is connected to the second connecting rod 222 (the connection method includes, but is not limited to, welding, bonding or connection via a connector). The other end of the first plate-shaped member is arranged along the length direction of another second connecting rod 222, and the second surface of the first plate-shaped member is connected to the second connecting rod 222 (the connection method includes, but is not limited to, welding, bonding or connection via a connector), thereby causing the structure of the first plate-shaped member to be twisted and forming a spiral structure.

[0097] By connecting the first and second surfaces of the first plate to different second connecting rods 222, the first plate can form a spiral structure, thereby forming a first propeller blade 23. Driven by the stirring shaft 21, the first propeller blade 23 can drive the slurry to move from bottom to top or from top to bottom, thereby improving the fluidity of the slurry and reducing the situation of the slurry stagnating and drying.

[0098] It should be noted that, along the radial direction X of the stirring component, the first plate-shaped component is spaced apart from the inner peripheral wall of the stirring space 11, the stirring shaft 21 and the second propeller blade 24, and the specific width of the first plate-shaped component can be set as needed.

[0099] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, the portion of the first propeller blade 23 located between the first connecting portion 231 and the second connecting portion 232 protrudes towards one side of the inner peripheral wall of the stirring space 11. The first propeller blade 23 has a first projection on the inner bottom surface of the stirring space 11, and the first projection is a first semi-circular ring structure.

[0100] Specifically, by configuring the first propeller blade 23, the first propeller blade 23 can increase the stirring area in the radial direction X of the stirring shaft 21, thereby further improving the stirring effect on the slurry.

[0101] In some embodiments of this application, such as Figure 1 As shown, the distance between the first semi-circular ring structure and the inner peripheral wall of the stirring space 11 is greater than 0.

[0102] Specifically, the portion of the first propeller blade 23 located between the first connecting portion 231 and the second connecting portion 232 protrudes towards one side of the inner peripheral wall of the stirring space 11. The first propeller blade 23 has a first projection on the inner bottom surface of the stirring space 11. The first projection is a first semi-circular ring structure. The distance between the first semi-circular ring structure and the inner peripheral wall of the stirring space 11 is a second distance b. The second distance b is set to be greater than 0, so that there is a gap between the first propeller blade 23 and the inner peripheral wall of the stirring space 11, reducing the interference between the first propeller blade 23 and the inner peripheral wall of the stirring space 11.

[0103] It should be noted that the specific value of the second distance b can be 0.5 cm, 1.5 cm, 2.5 cm, 3.5 cm, 4.5 cm, 5.5 cm, 6.5 cm, or 7.5 cm.

[0104] In some embodiments of this application, such as Figure 1 As shown, the distance between the first semi-circular ring structure and the inner peripheral wall of the stirring space 11 is in the range of 1 cm to 2 cm.

[0105] Specifically, the portion of the first propeller blade 23 located between the first connecting portion 231 and the second connecting portion 232 protrudes towards one side of the inner peripheral wall of the stirring space 11. The first propeller blade 23 has a first projection on the inner bottom surface of the stirring space 11. The first projection is a first semi-circular ring structure. The distance between the first semi-circular ring structure and the inner peripheral wall of the stirring space 11 is a second distance b, wherein the second distance b is set to be greater than or equal to 1 cm and less than or equal to 2 cm.

[0106] This configuration allows the distance between the first propeller blade 23 and the inner peripheral wall of the mixing space 11 to be controlled within a better range, thereby improving the mixing effect of the first propeller blade 23 on the slurry in the mixing space 11.

[0107] It should be noted that the specific value of the second distance b can be 1 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm, or 2 cm.

[0108] In some embodiments of this application, such as Figures 1 to 4 As shown, there are two first propeller blades 23. Along the radial direction X of the stirring shaft 21, the two first propeller blades 23 are connected to opposite sides of the second connecting rod 222, and the first connecting part 231 of one first propeller blade 23 is connected to the first connecting part 231 of the other first propeller blade 23 on different second connecting rods 222.

[0109] Specifically, the two first propeller blades 23 rotate in the same direction. When the stirring shaft 21 drives the two first propeller blades 23 to rotate, the two propeller blades can drive the slurry to move in the same direction. With this arrangement, first propeller blades 23 can be provided on both opposite sides of the stirring shaft 21, thereby improving the stirring ability of the slurry and thus enhancing the stirring effect of the slurry.

[0110] In some embodiments of this application, such as Figures 1 to 4 As shown, the stirring frame 22 also includes a third connecting rod 223, which is connected to the stirring shaft 21 and is angled to the stirring shaft 21. The third connecting rod 223 is spaced above the first connecting rod 221 and extends along the radial direction X of the stirring shaft 21. Both ends of the third connecting rod 223 protrude from the stirring shaft 21. The second propeller blade 24 includes a first part 241 and a second part 242 arranged opposite to each other. One of the first part 241 and the second part 242 is connected to the portion of the first connecting rod 221 that protrudes from the stirring shaft 21, and the other part of the first part 241 and the second part 242 is connected to the portion of the third connecting rod 223 that protrudes from the stirring shaft 21. Along the radial direction X of the stirring shaft 21, the first part 241 and the second part 242 are located on opposite sides of the stirring shaft 21, and along the axial direction Y of the stirring shaft 21, the first part 241 and the second part 242 are spaced apart.

[0111] Specifically, the first connecting rod 221 and the third connecting rod 223 are respectively connected to the stirring shaft 21. The opposite ends of the first connecting rod 221 protrude from the stirring shaft 21, and the opposite ends of the third connecting rod 223 also protrude from the stirring shaft 21. The third connecting rod 223 is spaced above the first connecting rod 221. The second connecting rod 222 is respectively connected to the opposite ends of the first connecting rod 221. The two second connecting rods 222 are respectively connected to the opposite ends of the first connecting rod 221. The first propeller blade 23 is connected to the two second connecting rods 222. The second propeller blade 24 is respectively connected to the third connecting rod 223 and the first connecting rod 221.

[0112] A third connecting rod 223 is provided, such that the second propeller blade 24 is connected to both the third connecting rod 223 and the first connecting rod 221. Along the radial direction X of the stirring shaft 21, the second propeller blade 24 is positioned inside the first propeller blade 23. During slurry stirring, along the radial direction X of the stirring shaft 21, the first propeller blade 23 and the second propeller blade 24 stir the slurry at different locations, increasing the number of stirring points and further improving the uniformity of the slurry, reducing air bubbles, and ultimately improving the yield of the battery cells.

[0113] It should be understood that when the third connecting rod 223 rotates relative to the stirring shaft 21, the third connecting rod 223 can also stir the slurry, thereby further improving the uniformity of the slurry.

[0114] It should be noted that the connection method between the third connecting rod 223 and the stirring shaft 21 includes, but is not limited to, bonding, welding, or connection via a connector. The third connecting rod 223 and the stirring shaft 21 are arranged crosswise, and the angle between them is greater than 0 degrees and less than 180 degrees (for example, it can be 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, 160 degrees, 170 degrees, or 180 degrees).

[0115] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the third connecting rod 223 is vertically connected to the stirring shaft 21, and the third connecting rod 223 is symmetrically arranged relative to the stirring shaft 21.

[0116] Specifically, the third connecting rod 223 is vertically connected to the stirring shaft 21, and is symmetrically arranged relative to the stirring shaft 21. When the drive shaft drives the third connecting rod 223 to rotate, the third connecting rod 223 can simultaneously stir the slurry. The vertical connection and symmetrical arrangement of the third connecting rod 223 to the stirring shaft 21 enable the third connecting rod 223 to uniformly stir both sides of the stirring shaft 21 in the radial direction X, thereby further improving the uniformity of the slurry stirring.

[0117] In addition, the structure formed by the third connecting rod 223 and the stirring shaft 21 can make the stirring frame 22 be subjected to uniform force during the stirring process, reducing the occurrence of stress concentration that causes the stirring frame 22 to deform and affect the slurry stirring effect.

[0118] It should be noted that the first link 221 and the third link 223 can be located in the same plane or in different planes.

[0119] In this application, the first connecting rod 221, the third connecting rod 223, the stirring shaft 21, and the two second connecting rods 222 are all located in the same plane. This arrangement, which is a symmetrical structure with the stirring shaft 21 as the axis of symmetry, allows the stirring frame 22 to be subjected to uniform force during the stirring of the slurry, thereby improving the stability of the structure, reducing the failure rate of the stirring paddle 20, and effectively improving the stirring effect of the slurry.

[0120] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the second propeller blade 24 is a second plate-shaped member. The second plate-shaped member includes a first surface and a second surface arranged opposite to each other. One of the first surface and the second surface is connected to the portion of the first connecting rod 221 that protrudes from the stirring shaft 21, and the other of the first surface and the second surface is connected to the portion of the third connecting rod 223 that protrudes from the stirring shaft 21, so that the second plate-shaped member forms a spiral structure.

[0121] Specifically, the first connecting rod 221 is vertically connected to the end of the stirring shaft 21 facing the bottom surface of the stirring space 11 and is symmetrically arranged relative to the stirring shaft 21. The third connecting rod 223 is vertically connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21. One end of the second plate-shaped member is connected to the side of the third connecting rod 223 that protrudes from the stirring shaft 21, and the first surface of the second plate-shaped member is connected to this part (the connection method includes, but is not limited to, welding, bonding or connection via a connector). The other end of the second plate-shaped member is connected to the side of the third connecting rod 223 that protrudes from the stirring shaft 21, and the second surface of the second plate-shaped member is connected to the second connecting rod 222 (the connection method includes, but is not limited to, welding, bonding or connection via a connector), thereby causing the structure of the second plate-shaped member to be twisted and forming a spiral structure.

[0122] By connecting the first and second surfaces of the second plate to the first connecting rod 221 and the third connecting rod 223 respectively, the second plate can form a spiral structure, thereby forming a second propeller blade 24. Under the drive of the stirring shaft 21, the propeller blade 24 can drive the slurry to move from bottom to top or from top to bottom, thereby improving the fluidity of the slurry and reducing the situation of the slurry drying out.

[0123] It should be noted that, along the radial direction X of the stirring component, the second plate-shaped component is spaced apart from the inner peripheral wall of the stirring space 11, the stirring shaft 21 and the first propeller blade 23, and the specific width of the plate-shaped component can be set as needed.

[0124] In some embodiments of this application, such as Figure 3As shown, the portion of the second propeller blade 24 located between the first portion 241 and the second portion 242 protrudes towards one side of the inner peripheral wall of the stirring space 11. The second propeller blade 24 has a second projection on the inner bottom surface of the stirring space 11, and the second projection is a second semi-circular ring structure.

[0125] Specifically, by configuring the second propeller blade 24, the mixing area of ​​the second propeller blade 24 in the radial direction X of the mixing shaft 21 can be increased, thereby further improving the mixing effect on the slurry.

[0126] In some embodiments of this application, such as Figures 1 to 4 As shown, there are two second propeller blades 24. Along the radial direction X of the stirring shaft 21, the two second propeller blades 24 are connected on opposite sides of the third connecting rod 223. Along the radial direction X of the stirring shaft 21, the first part 241 of one second propeller blade 24 and the first part 241 of the other second propeller blade 24 are arranged on opposite sides of the stirring shaft 21.

[0127] Specifically, the two second propeller blades 24 rotate in the same direction. When the stirring shaft 21 drives the two second propeller blades 24 to rotate, the two propeller blades can drive the slurry to move in the same direction. With this arrangement, second propeller blades 24 can be provided on both opposite sides of the stirring shaft 21, thereby improving the stirring ability of the slurry and thus enhancing the stirring effect of the slurry.

[0128] It should be understood that the first propeller blade 23 and the second propeller blade 24 rotate in the same direction. When the stirring shaft 21 drives the first propeller blade 23 and the second propeller blade 24 to rotate, the first propeller blade 23 and the second propeller blade 24 can drive the slurry to move in the same direction.

[0129] In some embodiments of this application, such as Figure 1 As shown, the stirring space 11 includes a minimum liquid level 15, which is set above the top of the stirring frame 22 along the axial direction Y of the stirring shaft 21.

[0130] Specifically, by setting the lowest liquid level 15 above the top of the stirring frame 22 along the axial direction Y of the stirring shaft 21, both the stirring frame 22 and the stirring paddle 20 can be placed inside the slurry, thereby reducing the slurry retention caused by contact with protruding slurry, and further reducing the increase of solid particles in the slurry due to drying caused by slurry retention.

[0131] In some embodiments of this application, such as Figure 1 As shown, along the axial direction Y of the stirring shaft 21, the lowest liquid level 15 is flush with the top of the stirring frame 22, and the ratio of the lowest liquid level 15 to the height of the stirring space 11 is in the range of 0.6 to 0.8.

[0132] Specifically, along the axial direction Y of the stirring shaft 21, the lowest liquid level 15 is set flush with the top of the stirring frame 22, and the ratio of the lowest liquid level 15 to the height of the stirring space 11 is set to be greater than or equal to 0.6 and less than or equal to 0.8. This allows the stirring paddle 20 to ensure that the stirring frame 22 has sufficient dimensions in the axial direction Y of the stirring shaft 21, thereby improving the stirring ability of the slurry and enhancing the uniformity of the slurry.

[0133] It should be noted that the ratio of the minimum liquid level 15 to the height of the stirring space 11 can be 0.62, 0.64, 0.66, 0.68, 0.72, 0.74, 0.76, 0.78, or 0.80.

[0134] In some embodiments of this application, the ratio of the lowest liquid level 15 to the height of the stirring space 11 along the axial direction Y of the stirring shaft 21 is in the range of 0.6 to 0.7.

[0135] Specifically, along the axial direction Y of the stirring shaft 21, the ratio of the lowest liquid level 15 to the height of the stirring space 11 is set to be greater than or equal to 0.6 and less than or equal to 0.7. This makes the size of the stirring frame 22 in the axial direction Y of the stirring shaft 21 appropriate, reducing the situation where the slurry is stuck at the top edge of the stirring space 11 during the stirring process, further reducing the situation where the slurry dries out due to slurry retention, and thus reducing the number of solid particles in the slurry.

[0136] It should be noted that the ratio of the minimum liquid level 15 to the height of the stirring space 11 can be 0.61, 0.63, 0.65, 0.67, 0.69, or 0.7.

[0137] In some embodiments of this application, the rotational speed of the stirring shaft 21 is in the range of 5 rpm to 25 rpm.

[0138] Specifically, the rotation speed of the stirring shaft 21 is set to be greater than or equal to 5 rpm and less than or equal to 25 rpm, so that the stirring paddle 20 can uniformly stir the slurry, thereby effectively improving the uniformity of the slurry.

[0139] It should be noted that in this application, the driving component 30 is a driving motor, which is connected to the stirring shaft 21 through a transmission mechanism. The transmission mechanism can be a reducer or similar structure, so that the driving component 30 can transmit the required rotational speed to the stirring shaft 21.

[0140] It should be noted that, in this application, the rotational speed of the stirring shaft 21 can be 5 rpm, 5.5 rpm, 6.5 rpm, 7.5 rpm, 8.5 rpm, 9.5 rpm, 1.5 rpm, 11 rpm, 12 rpm, 13 rpm, 14 rpm, 15 rpm, 16 rpm, 17 rpm, 18 rpm, 19 rpm, 20 rpm, 21 rpm, 22 rpm, 23 rpm, 24 rpm, or 25 rpm.

[0141] In some embodiments of this application, the rotational speed of the stirring shaft 21 is in the range of 6 rpm to 10 rpm.

[0142] Specifically, setting the rotation speed of the stirring shaft 21 to be greater than or equal to 6 rpm and less than or equal to 10 rpm enables the stirring paddle 20 to effectively stir the slurry while effectively reducing energy consumption.

[0143] It should be noted that, in this application, the rotational speed of the stirring shaft 21 can be 6 rpm, 7 rpm, 8 rpm, 9 rpm, or 10 rpm.

[0144] In some embodiments of this application, the discharge port 13 is connected to the bottom of the mixing space 11.

[0145] Specifically, the discharge port 13 is connected to the bottom of the mixing space 11 to facilitate the discharge of slurry in the mixing space 11, thereby improving the discharge efficiency of the tank 10.

[0146] It should be noted that the discharge port 13 is equipped with a flange structure, which facilitates the connection of the discharge port 13 to the pipeline.

[0147] In some embodiments of this application, the feed inlet 12 is connected to the top of the side wall of the mixing space 11.

[0148] Specifically, the feed inlet 12 is connected to the top of the side wall of the mixing space 11, so that when the slurry enters the mixing space 11, it can contact the mixing paddle 20, so that the gas in the slurry can be separated from the slurry, thereby reducing the amount of gas mixed in the slurry.

[0149] It should be noted that the feed inlet 12 is equipped with a flange structure, which facilitates the connection of the discharge outlet 13 to the pipeline.

[0150] In addition, a return port 14 is provided in the tank body 10. The return port 14 is used to connect to the coating equipment so that excess slurry in the coating equipment can be collected in the tank body 10 to reduce slurry waste.

[0151] like Figures 1 to 5As shown, a second aspect of this application discloses a slurry mixing method, which is implemented by the slurry mixing equipment 100 described above. The slurry mixing method includes:

[0152] S10: Obtain the current status of the slurry coating equipment.

[0153] Specifically, the current state of the slurry coating equipment is obtained, and the slurry mixing equipment 100 is controlled according to the current state of the slurry coating equipment so that the slurry can be kept in the optimal state, thereby providing a stable slurry for the production of battery cells and thus improving the yield of battery cells.

[0154] It should be understood that the current state of the slurry coating equipment includes, but is not limited to, the normal coating state (i.e., the slurry coating equipment is in the state of coating the electrode) and the shutdown state (i.e., the slurry coating equipment has stopped coating the electrode).

[0155] In addition, the current status of the slurry coating equipment can be obtained manually or by monitoring the slurry coating equipment through sensors and other components, so as to effectively obtain the current status of the slurry coating equipment.

[0156] S20: Based on the current state being normal coating state, control the drive shaft of the drive unit 30 to rotate along the first direction M, so that the stirring paddle 20 stirs the slurry along the first direction M, so that the slurry moves from bottom to top in the stirring space 11.

[0157] Specifically, when the current state of the slurry coating equipment is normal coating state, that is, when the slurry coating equipment is currently coating the electrode, it is necessary to keep the slurry in good fluidity to reduce the situation of slurry stagnation and drying, thereby reducing the situation of increased solid particles in the slurry due to slurry drying.

[0158] Specifically, the slurry enters the tank 10 through the inlet 12 and is agitated by the agitator 20 before being discharged through the outlet 13 to provide slurry for coating. The agitator 20 rotates in the first direction M, and the first propeller blade 23 and the second propeller blade 24 drive the slurry to move from bottom to top. The rotation of the first propeller blade 23 and the second propeller blade 24 can tumble the slurry upwards, improving its fluidity and reducing slurry retention. This reduces the problem of slurry drying due to retention, thereby reducing the number of solid particles in the slurry and improving the yield of battery cells.

[0159] S30: Based on the current state being a shutdown state, control the drive shaft of the drive unit 30 to rotate along the second direction N, so that the stirring paddle 20 stirs the slurry along the second direction N, so that the slurry moves from top to bottom within the stirring space 11.

[0160] Specifically, when the current state of the slurry coating equipment is the shutdown state, that is, the slurry coating equipment is not coating the electrode, it is necessary to maintain good viscosity of the slurry in order to improve the manufacturability, stability and consistency of the slurry.

[0161] The stirring paddle 20 rotates in the second direction N, and the first propeller blade 23 and the second propeller blade 24 drive the slurry to move from top to bottom. The rotation of the first propeller blade 23 and the second propeller blade 24 can press down on the slurry, so that the slurry maintains a better viscosity.

[0162] S40: Get the current rotational speed of the agitator 20.

[0163] Specifically, the rotational speed of the agitator 20 has a direct impact on the mixing of the slurry. The rotational speed of the agitator 20 is monitored by sensors and other components to keep it within the required range, thereby improving the mixing effect of the agitator 20 on the slurry.

[0164] S50: If the current rotation speed of the agitator 20 is outside the preset rotation speed range, control the slurry mixing equipment 100 to issue the first alarm message.

[0165] Specifically, when the current rotation speed of the stirring paddle 20 is outside the preset rotation speed range, it indicates that the current rotation speed cannot meet the stirring requirements of the slurry. At this time, the rotation speed needs to be adjusted. The first alarm message is issued by controlling the slurry stirring equipment 100 so that the on-site personnel can adjust the rotation speed in time, thereby reducing the problem of poor slurry stirring effect leading to a decrease in the yield of battery cells.

[0166] It should be noted that the preset speed range is between 5 rpm and 25 rpm.

[0167] S60: Obtain the current liquid level in the stirring space 11.

[0168] Specifically, the current liquid level in the mixing space 11 of the agitator 20 has a direct impact on the mixing of the slurry. The current liquid level in the mixing space 11 is monitored by sensors and other components so that the current liquid level in the mixing space 11 is maintained within the required range, thereby improving the mixing effect of the agitator 20 on the slurry.

[0169] S70: If the current liquid level is outside the preset liquid level range, the slurry mixing equipment 100 is controlled to issue a second alarm message. By monitoring the current liquid level of the slurry in the mixing space 11, the liquid level of the slurry can be controlled within the preset liquid level range, reducing the situation of slurry stagnation caused by excessive liquid level.

[0170] It should be noted that the ratio of the lowest liquid level 15 to the height of the stirring space 11 is in the range of 0.6 to 0.8.

[0171] According to the slurry mixing method in this application, the slurry can be fully mixed by the mixing paddle 20 during the coating process to improve the slurry's flowability, reduce the slurry's retention leading to drying, and reduce the number of solid particles in the slurry, thereby improving the yield of battery cells during the production process.

[0172] A third aspect of this application discloses a battery production line comprising a slurry mixing device 100 as described above.

[0173] When the mixing equipment is in use, the slurry enters the tank 10 through the inlet 12 and is agitated by the mixing paddle 20 before being discharged through the outlet 13 to provide slurry for coating. During the coating process, the mixing paddle 20 rotates in the first direction M, and the first propeller blade 23 and the second propeller blade 24 drive the slurry to move from bottom to top. When coating stops, the mixing paddle 20 rotates in the second direction N, and the first propeller blade 23 and the second propeller blade 24 drive the slurry to move from top to bottom. By setting the first propeller blade 23 and the second propeller blade 24, the slurry can be turned upwards, improving the slurry's fluidity and reducing slurry retention. This reduces the problem of slurry drying due to retention, thereby reducing the number of solid particles in the slurry and improving the yield of battery cells.

[0174] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0175] In the embodiments of this application, such as Figures 1 to 4 As shown, this application proposes a slurry mixing device 100, which includes a tank 10, a mixing paddle 20 and a driving component 30. The tank 10 includes a mixing space 11, a feed inlet 12 and a discharge outlet 13. The feed inlet 12 and the discharge outlet 13 are respectively connected to the mixing space 11. The discharge outlet 13 is connected to the bottom of the mixing space 11, and the feed inlet 12 is connected to the top of the side wall of the mixing space 11.

[0176] The stirring paddle 20 is rotatably disposed within the stirring space 11. The stirring paddle 20 includes a stirring shaft 21, a stirring frame 22, a first propeller blade 23, and a second propeller blade 24. The stirring shaft 21 is arranged along the height direction of the tank body 10. The stirring frame 22 is connected to the stirring shaft 21 and rotates synchronously with it. The first propeller blade 23 and the second propeller blade 24 are respectively connected to the stirring frame 22. The first propeller blade 23 and the second propeller blade 24 are respectively arranged around the stirring shaft 21 along the radial direction X of the stirring shaft 21. The stirring diameter of the first propeller blade 23 is larger than that of the second propeller blade 24. The drive unit 30 is located outside the stirring space 11. The drive unit 30 includes a drive shaft that is connected to the stirring shaft 21. The drive shaft can rotate in opposite directions, a first direction M and a second direction N. When the drive shaft rotates in the first direction M, the first propeller blade 23 and the second propeller blade 24 can drive the slurry to move from bottom to top. When it rotates in the second direction N, the first propeller blade 23 and the second propeller blade 24 can drive the slurry to move from top to bottom.

[0177] In some embodiments of this application, the stirring frame 22 includes a first connecting rod 221 and two second connecting rods 222. The first connecting rod 221 is vertically connected to one end of the stirring shaft 21 facing the inner bottom surface of the stirring space 11. Along the radial direction X of the stirring shaft 21, the two ends of the first connecting rod 221 protrude from the stirring shaft 21 respectively. The first connecting rod 221 is symmetrically arranged relative to the stirring shaft 21. The distance between the first connecting rod 221 and the inner bottom surface of the stirring space 11 is greater than or equal to 1 cm and less than or equal to 2 cm.

[0178] Two second connecting rods 222 are respectively connected at an angle to the first connecting rod 221. The stirring shaft 21 and the two second connecting rods 222 are located on the same side of the first connecting rod 221. The two second connecting rods 222 are parallel to the stirring shaft 21. Along the radial direction X of the stirring shaft 21, the two second connecting rods 222 are located on opposite sides of the stirring shaft 21. The first propeller blade 23 includes a first connecting part 231 and a second connecting part 232 arranged oppositely. The first connecting part 231 is connected to one second connecting rod 222, and the second connecting part 232 is connected to the other second connecting rod 222. Along the axial direction Y of the stirring shaft 21, the first connecting part 231 and the second connecting part 232 are spaced apart.

[0179] The first propeller blade 23 is a first plate-shaped member, which includes a first surface and a second surface arranged opposite to each other. The first surface and the second surface are respectively connected to two second connecting rods 222 to form a spiral structure. The portion of the first propeller blade 23 located between the first connecting portion 231 and the second connecting portion 232 protrudes towards one side of the inner peripheral wall of the stirring space 11. The first propeller blade 23 has a first projection on the inner bottom surface of the stirring space 11, which is a first semi-circular ring structure. The distance between the first semi-circular ring structure and the inner peripheral wall of the stirring space 11 is greater than or equal to 1 cm and less than or equal to 2 cm. There are two first propeller blades 23. Along the radial direction X of the stirring shaft 21, the two first propeller blades 23 are connected to opposite sides of the second connecting rods 222, and the first connecting portion 231 of one first propeller blade 23 is connected to the first connecting portion 231 of the other first propeller blade 23 on different second connecting rods 222.

[0180] The stirring frame 22 also includes a third connecting rod 223, which is vertically connected to the stirring shaft 21 and is symmetrically arranged relative to the stirring shaft 21. The third connecting rod 223 is spaced above the first connecting rod 221 and protrudes from the stirring shaft 21 at both ends along the radial direction X of the stirring shaft 21. The second propeller blade 24 includes a first part 241 and a second part 242 arranged opposite to each other. One of the first part 241 and the second part 242 is connected to the part of the first connecting rod 221 that protrudes from the stirring shaft 21, and the other part of the first part 241 and the second part 242 is connected to the part of the third connecting rod 223 that protrudes from the stirring shaft 21. Along the radial direction X of the stirring shaft 21, the first part 241 and the second part 242 are located on opposite sides of the stirring shaft 21, and along the axial direction Y of the stirring shaft 21, the first part 241 and the second part 242 are spaced apart.

[0181] The second propeller blade 24 is a second plate-shaped component, comprising a first surface and a second surface arranged opposite to each other. One of the first surface and the second surface is connected to the portion of the first connecting rod 221 protruding from the stirring shaft 21, and the other of the first surface and the second surface is connected to the portion of the third connecting rod 223 protruding from the stirring shaft 21, so that the second plate-shaped component forms a spiral structure. The portion of the second propeller blade 24 located between the first portion 241 and the second portion 242 protrudes towards one side of the inner peripheral wall of the stirring space 11. The second propeller blade 24 has a second projection on the inner bottom surface of the stirring space 11, and the second projection is a second semi-circular ring structure. There are two second propeller blades 24. Along the radial direction X of the stirring shaft 21, the two second propeller blades 24 are connected on opposite sides of the third connecting rod 223. Along the radial direction X of the stirring shaft 21, the first portion 241 of one second propeller blade 24 and the first portion 241 of the other second propeller blade 24 are arranged on opposite sides of the stirring shaft 21.

[0182] Along the axial direction Y of the stirring shaft 21, the lowest liquid level 15 of the stirring space 11 is flush with the top of the stirring frame 22, and the ratio of the lowest liquid level 15 to the height of the stirring space 11 is greater than or equal to 0.6 and less than or equal to 0.7. The rotational speed of the stirring shaft 21 is greater than or equal to 6 rpm and less than or equal to 10 rpm. This configuration allows the stirring paddle 20 to effectively stir the slurry while effectively reducing energy consumption.

[0183] In this application, the mixing equipment allows slurry to enter the tank 10 through the inlet 12, be agitated by the mixing paddle 20, and then be discharged through the outlet 13 to provide slurry for coating. During coating, the mixing paddle 20 rotates in the first direction M, and the first propeller blade 23 and the second propeller blade 24 drive the slurry from bottom to top. When coating stops, the mixing paddle 20 rotates in the second direction N, and the first propeller blade 23 and the second propeller blade 24 drive the slurry from top to bottom. By setting the first propeller blade 23 and the second propeller blade 24, the slurry can be turned upwards, improving its fluidity and reducing slurry retention. This reduces the problem of slurry drying due to retention, resulting in a reduction of solid particles in the slurry and thus improving the yield of battery cells.

[0184] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A slurry mixing device, characterized in that, The slurry mixing equipment includes: The tank body includes a stirring space, a feed inlet, and a discharge outlet, wherein the feed inlet and the discharge outlet are respectively connected to the stirring space; The stirring paddle includes a stirring shaft, a stirring frame, a first propeller blade, and a second propeller blade. The stirring frame is connected to the stirring shaft and rotates synchronously with the stirring shaft. The first propeller blade and the second propeller blade are respectively connected to the stirring frame and are respectively arranged around the stirring shaft. Along the radial direction of the stirring shaft, the stirring diameter of the first propeller blade is larger than that of the second propeller blade. Along the axial direction of the stirring shaft, the distance between the stirring frame and the inner bottom surface of the stirring space is between 0 and 2 cm. Along the radial direction of the stirring shaft, the minimum distance between the first propeller blade and the inner peripheral wall of the stirring space is between 0 and 2 cm. A driving component is disposed outside the stirring space. The driving component includes a driving shaft that is pulverizedly connected to the stirring shaft. The driving shaft is capable of rotating in opposite directions, namely a first direction and a second direction. When the driving shaft rotates in the first direction, the first propeller blade and the second propeller blade can drive the slurry to move from bottom to top. When the driving shaft rotates in the second direction, the first propeller blade and the second propeller blade can drive the slurry to move from top to bottom.

2. The slurry mixing equipment as described in claim 1, characterized in that, The stirring frame includes: A first connecting rod is connected to the stirring shaft and is set at an angle to the stirring shaft. Along the radial direction of the stirring shaft, both ends of the first connecting rod protrude from the stirring shaft. Two second connecting rods are respectively connected at an angle to the first connecting rod. Along the radial direction of the stirring shaft, the two second connecting rods are located on opposite sides of the stirring shaft. The first propeller blade includes a first connecting part and a second connecting part arranged opposite to each other. The first connecting part is connected to one of the second connecting rods, and the second connecting part is connected to the other of the second connecting rods. Along the axial direction of the stirring shaft, the first connecting part and the second connecting part are spaced apart.

3. The slurry mixing equipment as described in claim 2, characterized in that, The first connecting rod is connected to the bottom end of the stirring shaft and is arranged perpendicular to the stirring shaft. The first connecting rod is arranged symmetrically with respect to the stirring shaft.

4. The slurry mixing equipment as described in claim 3, characterized in that, The stirring shaft and the two second connecting rods are located on the same side of the first connecting rod, and the two second connecting rods are parallel to the stirring shaft.

5. The slurry mixing equipment as described in claim 4, characterized in that, The first propeller blade is a first plate-shaped member, which includes a first surface and a second surface arranged in opposite directions. The first surface and the second surface are respectively connected to two second connecting rods to form a spiral structure. The portion of the first propeller blade located between the first connecting portion and the second connecting portion protrudes towards one side of the inner peripheral wall of the stirring space. The first propeller blade has a first projection on the inner bottom surface of the stirring space, which is a first semi-circular ring structure.

6. The slurry mixing equipment as described in claim 5, characterized in that, The number of first propeller blades is two. Along the radial direction of the stirring shaft, the two first propeller blades are connected to opposite sides of the second connecting rod, and the first connecting part of one first propeller blade is connected to the first connecting part of the other first propeller blade on different second connecting rods.

7. The slurry mixing equipment as described in claim 3, characterized in that, The stirring frame further includes a third connecting rod, which is connected to the stirring shaft and is angled to the stirring shaft. The third connecting rod is spaced above the first connecting rod and runs along the radial direction of the stirring shaft. Both ends of the third connecting rod protrude from the stirring shaft. The second propeller blade includes a first part and a second part arranged opposite to each other. One of the first part and the second part is connected to the part of the first connecting rod that protrudes from the stirring shaft, and the other of the first part and the second part is connected to the part of the third connecting rod that protrudes from the stirring shaft. In this configuration, along the radial direction of the stirring shaft, the first part and the second part are located on opposite sides of the stirring shaft, and along the axial direction of the stirring shaft, the first part and the second part are spaced apart. The third connecting rod is vertically connected to the stirring shaft and is symmetrically arranged relative to the stirring shaft.

8. The slurry mixing equipment as described in claim 7, characterized in that, The second propeller blade is a second plate-shaped member, which includes a first surface and a second surface arranged opposite to each other. One of the first surface and the second surface is connected to the portion of the first connecting rod that protrudes from the stirring shaft, and the other of the first surface and the second surface is connected to the portion of the third connecting rod that protrudes from the stirring shaft, so that the second plate-shaped member forms a spiral structure. The portion of the second propeller blade located between the first portion and the second portion protrudes towards one side of the inner peripheral wall of the stirring space. The second propeller blade has a second projection on the inner bottom surface of the stirring space, and the second projection is a second semi-circular ring structure.

9. The slurry mixing equipment as described in claim 8, characterized in that, The number of second propeller blades is two. Along the radial direction of the stirring shaft, the two second propeller blades are connected to opposite sides of the third connecting rod. Along the radial direction of the stirring shaft, the first part of one second propeller blade and the first part of the other second propeller blade are arranged on opposite sides of the stirring shaft.

10. The slurry mixing equipment according to any one of claims 1 to 9, characterized in that, The stirring space includes a minimum liquid level, which is flush with the top of the stirring frame along the axial direction of the stirring shaft, and the ratio of the minimum liquid level to the height of the stirring space is in the range of 0.6 to 0.

8.

11. The slurry mixing equipment as described in claim 10, characterized in that, Along the axial direction of the stirring shaft, the ratio of the lowest liquid level to the height of the stirring space is in the range of 0.6 to 0.

7.

12. The slurry mixing equipment according to any one of claims 1 to 9, characterized in that, The rotational speed of the stirring shaft is greater than or equal to 5 revolutions per minute and less than or equal to 25 revolutions per minute.

13. The slurry mixing equipment as described in claim 12, characterized in that, The rotational speed of the stirring shaft is in the range of 6 to 10 revolutions per minute.

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