Mixing machine for crushing and coating all-solid-state electrolyte powder and using method

Abstract

The invention belongs to the technical field of battery production, and particularly relates to a mixing machine for crushing and coating all-solid-state electrolyte powder and a use method. The mixing machine comprises a base and a driving mechanism mounted on the base, a stirring assembly; a stirring tank body; the stirring assembly comprises a stirring shaft which is coaxially arranged with the output end of the transmission assembly; the ship-shaped stirring paddle, the first horizontal stirring paddle, the second horizontal stirring paddle and the V-shaped stirring paddle are fixedly mounted on the stirring shaft in sequence from bottom to top; the ship-shaped stirring paddle is perpendicular to the first horizontal stirring paddle, the first horizontal stirring paddle is perpendicular to the second horizontal stirring paddle, and the second horizontal stirring paddle is perpendicular to the V-shaped stirring paddle. By arranging the stirring paddles with different heights and specific shapes, layered mixing and crushing of materials are realized, mixing dead angles are avoided, and the mixing efficiency and mixing quality of the materials are effectively improved. According to the invention, any two adjacent stirring paddles are mounted in a mutually vertical state, so that multi-layer convection cutting is carried out on materials, and the mixing uniformity is optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of battery production, and in particular relates to a mixer for crushing and coating all-solid electrolyte powder and a use method thereof. Background Art

[0002] As time goes by, the traditional power battery system will be difficult to meet the energy density requirements in ten years. As we all know, power batteries directly correspond to the cost performance of new energy vehicle products, and energy density is a key indicator of power batteries. Solid-state batteries have the characteristics of high energy density, good safety, strong cyclability, and a wide range of applications. Therefore, solid-state batteries have become a must. Solid-state batteries use non-flammable solid electrolytes to replace flammable organic liquid electrolytes, which can greatly improve the safety of the battery system. At the same time, they can better adapt to high-energy positive and negative electrodes and reduce the weight of the system, achieving a simultaneous increase in energy density.

[0003] All-solid-state batteries are one of the emerging technology directions that are currently recognized by the industry as promising to break through the bottleneck of chemical energy storage technology and meet future development needs. As the core component of all-solid-state batteries, solid electrolytes are key materials for preparing all-solid-state lithium batteries with high energy density, high cycle stability and high safety performance. The mixers in the existing technology cannot meet the crushing and coating quality of solid electrolytes, and the crushing and coating efficiency is low. Therefore, there is an urgent need for a mixer for crushing and coating all-solid-state electrolyte powders with high crushing efficiency and good coating effect. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of low crushing and coating quality and low efficiency in the prior art, and to provide a stirring component designed specifically, which can crush battery solid electrolyte powder with high crushing quality and high efficiency, and a mixer for crushing and coating all-solid electrolyte powder and a method for using the same.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] As a first aspect, a mixer for crushing and coating all-solid electrolyte powders comprises:

[0007] A base and a driving mechanism mounted on the base;

[0008] A stirring assembly is connected to the driving mechanism through a transmission assembly;

[0009] A stirring tank body is fixedly mounted on the base, and the stirring assembly extends inside the stirring tank body;

[0010] The stirring assembly comprises a stirring shaft coaxially arranged with the output end of the transmission assembly; a boat-shaped stirring paddle, at least two horizontal stirring paddles and a V-shaped stirring paddle fixedly installed with the stirring shaft from bottom to top;

[0011] The ship-shaped stirring paddle is vertically arranged between the adjacent horizontal stirring paddles, between adjacent horizontal stirring paddles, and between the V-shaped stirring paddle and the adjacent horizontal stirring paddle; the ship-shaped stirring paddle, the horizontal stirring paddle, and the V-shaped stirring paddle are all located in the middle and lower part of the stirring tank body, and the upward inclination angle of the outer edge of the V-shaped stirring paddle is greater than the upward inclination angle of the outer edge of the ship-shaped stirring paddle.

[0012] Furthermore, the ship-shaped stirring paddle includes a ship-shaped body and first cutting edges arranged at both ends of the ship-shaped body; the included angle β1 between the cutting edge direction of the first cutting edge and the inclined plane at the end of the ship-shaped body is 40° to 50°.

[0013] Furthermore, the horizontal stirring paddle adopts a straight-shaped stirring paddle; the horizontal stirring paddle includes the first horizontal stirring paddle and the second horizontal stirring paddle;

[0014] Both the first horizontal stirring paddle and the second horizontal stirring paddle include:

[0015] A horizontal paddle body fixedly installed on the stirring shaft;

[0016] Second cutting edges arranged at both ends of the horizontal paddle body, and the included angle β2 between the cutting edge direction of the second cutting edge and the horizontal plane of the horizontal paddle body is -40° to -50°.

[0017] Furthermore, the V-shaped stirring paddle includes: a V-shaped body symmetrically arranged along the stirring axis and third cutting edges arranged at both ends of the V-shaped body;

[0018] The included angle β3 between the cutting edge direction of the third cutting edge and the inclined plane at the end of the V-shaped body is 40° to 50°.

[0019] Furthermore, the driving mechanism includes:

[0020] A motor installed on the base;

[0021] A driving pulley coaxially arranged with the output shaft of the motor;

[0022] A driven pulley drivingly connected to the driving pulley through a transmission belt;

[0023] The driven pulley is coaxially arranged with the stirring shaft.

[0024] Furthermore, a feeding mechanism for adding materials is arranged at the upper part of the stirring tank body, and a discharging mechanism is arranged at the lower part of the stirring tank body;

[0025] The discharging mechanism includes:

[0026] A discharge port opened on the stirring tank body and a discharge plug cooperating with the discharge port;

[0027] An opening and closing fixed seat, fixedly installed on the outer wall of the mixing tank body;

[0028] A triangular handle, rotatably connected to the upper end of the opening and closing fixed seat through a connecting rod;

[0029] A triangular rotating plate, the first vertex end of the triangular rotating plate is rotatably connected to the opening and closing fixed seat, the second vertex end of the triangular rotating plate is rotatably connected to the triangular handle, and the third vertex end of the triangular rotating plate is fixedly installed with the discharge plug;

[0030] When converting from the blocked material state to the discharging state, the triangular handle rotates in a direction away from the mixing tank body, and the discharge plug disengages from the discharge port.

[0031] Furthermore, the mixing shaft is rotatably installed on the mixing tank body and the base through a double rotating bearing assembly;

[0032] The double rotating bearing assembly includes a bearing seat fixedly installed between the base and the mixing tank body, a first bearing arranged on the bearing seat for the rotating connection between the mixing shaft and the base, and a second bearing arranged on the bearing seat for the rotating connection between the mixing shaft and the mixing tank body.

[0033] Furthermore, a sealing assembly is arranged between the double rotating bearing assembly and the mixing shaft;

[0034] The sealing assembly includes:

[0035] A dry gas seal seat fixedly installed at the upper end of the bearing seat, and a cover plate covering the lower end face of the dry gas seal seat;

[0036] A first sealing cavity, formed by enclosing the mixing shaft, the dry gas seal seat, and the cover plate;

[0037] A second sealing cavity, arranged between the cover plate and the second bearing;

[0038] An air inlet hole, opened on the bearing seat and the dry gas seal seat, and communicated with the first sealing cavity; the air inlet hole is communicated with the air path of an external air source;

[0039] An air outlet hole, opened on the bearing seat, and communicated with the air path of the second sealing cavity;

[0040] And a first push ring, a first stationary ring, a moving ring, a second stationary ring, and a second push ring arranged in sequence from bottom to top in the first sealing cavity; the first push ring, the first stationary ring, the moving ring, the second stationary ring, and the second push ring are all sleeved on the mixing shaft; the moving ring rotates following the mixing shaft, and the first stationary ring and the second stationary ring are in clearance fit with the mixing shaft.

[0041] Furthermore, cooling jackets for cooling are provided on both the bearing housing and the stirring tank body.

[0042] As a second aspect, a method for using a mixer for crushing and coating all-solid-state electrolyte powder is characterized by including the following steps:

[0043] Add the battery all-solid-state electrolyte powder to be crushed into the stirring tank body.

[0044] Start the external air source to inflate the first sealing cavity through the air inlet hole.

[0045] Start the driving mechanism to drive the stirring assembly to rotate, and crush and coat the battery all-solid-state electrolyte powder in the stirring tank body.

[0046] After stirring is completed, stop the driving mechanism and perform the discharging operation.

[0047] After discharging is completed, stop supplying air to the first sealing cavity.

[0048] The beneficial effects of the mixer for crushing and coating all-solid-state electrolyte powder and the using method thereof according to the present invention are as follows:

[0049] The stirring assembly of the present invention adopts a four-layer design of a boat-shaped stirring paddle, a first horizontal stirring paddle, a second horizontal stirring paddle, and a V-shaped stirring paddle from bottom to top. The boat-shaped stirring paddle is arranged at the lowermost end of the stirring assembly. During the stirring process, upward forces are generated at both ends of the boat-shaped stirring paddle, and the bottom materials are pushed upward in the clockwise direction. The first horizontal stirring paddle and the second horizontal stirring paddle located in the middle position crush and stir the materials, while the V-shaped stirring paddle located at the top uses the V-shaped inclined surface to perform inclined upward throwing and stirring on the materials, so that the materials are in convection and the dispersion path of the materials is changed. By arranging stirring paddles at different heights and with specific shapes, the present invention realizes the layered convection mixing and crushing of the materials, avoids mixing dead corners, and effectively improves the mixing efficiency and mixing quality of the materials. At the same time, in the present invention, any two adjacent stirring paddles are installed in a mutually perpendicular state, and multi-level horizontal convection cutting is performed on the solid materials. The stirring paddles are arranged in a 90° staggered manner, so that the force is uniform, resonance is reduced. The upward inclination angle of the outer edge of the upper V-shaped stirring paddle is greater than the upward inclination angle of the lower boat-shaped stirring paddle, which is beneficial to the upward convection and full mixing of the powder and thorough discharging, guides the materials to form a circulating flow in the stirring tank body, can more effectively crush the materials, optimize the mixing uniformity, and further improve the mixing efficiency and quality.

[0050] The included angles between the cutting edges of the first cutting blades provided at both ends of the ship-shaped stirring paddle and the positive direction of the Z-axis, and the included angles between the cutting edges of the third cutting blades provided at both ends of the V-shaped stirring paddle and the positive direction of the Z-axis are all acute angles. The included angles between the cutting edges of the second cutting blades at both ends of the first horizontal stirring paddle and the second horizontal stirring paddle and the positive direction of the Z-axis are obtuse angles, which can crush the materials from multiple angles and positions, and crush the materials more effectively. Brief Description of the Drawings

[0051] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0052] Figure 1 It is a three-dimensional view of the mixer in the embodiment of the present invention.

[0053] Figure 2 is Figure 1 the cross-sectional view of

[0054] Figure 3 It is a structural schematic diagram of the stirring assembly in the embodiment of the present invention.

[0055] Figure 4 It is a cross-sectional view of the sealing assembly in the embodiment of the present invention.

[0056] Figure 5 It is a partial cross-sectional view of the sealing assembly in the embodiment of the present invention.

[0057] Figure 6 It is a connection diagram of the stirring assembly and the double-rotating bearing assembly in the embodiment of the present invention.

[0058] Figure 7 is Figure 6 the first perspective structural diagram of

[0059] Figure 8 is Figure 6 the second perspective structural diagram of

[0060] Figure 9 It is a partial structural schematic diagram of the mixer in the embodiment of the present invention.

[0061] Figure 10 It is a flowchart of the usage method of the mixer in the embodiment of the present invention.

[0062] In the figure: 1, base, 2, driving mechanism, 21, motor, 22, driving pulley, 23, driven pulley, 3, stirring assembly, 31, stirring shaft, 32, boat-shaped stirring paddle, 321, boat-shaped body, 322, first blade, 33, first horizontal stirring paddle, 331, horizontal paddle body, 332, second blade, 34, second horizontal stirring paddle, 35, V-shaped stirring paddle, 351, V-shaped body, 352, third blade, 4, stirring tank body, 5, double rotating bearing assembly, 51, bearing seat, 52, first bearing , 53, the second bearing, 6, the sealing assembly, 61, the dry gas sealing seat, 62, the cover plate, 63, the first sealing chamber, 64, the second sealing chamber, 65, the air inlet, 66, the air outlet, 67, the first push ring, 68, the first static ring, 69, the moving ring, 610, the second static ring, 611, the second push ring, 7, the cooling jacket, 8, the feeding mechanism, 82, the barrel cover, 83, the buckle, 9, the discharging mechanism, 92, the discharging plug, 93, the opening and closing fixed seat, 94, the triangular handle, 95, the triangular rotating plate, 96, the connecting rod. DETAILED DESCRIPTION

[0063] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0064] like Figures 1-9 The specific embodiment of the mixer for crushing and coating all-solid electrolyte powder of the present invention shown comprises a base 1 and a driving mechanism 2, a stirring assembly 3 and a stirring tank body 4 installed on the base 1, wherein the stirring assembly 3 is connected to the driving mechanism 2 through a transmission assembly, the stirring tank body 4 is fixedly installed on the base 1, the stirring assembly 3 extends inside the stirring tank body 4, and the stirring assembly 3 comprises a stirring shaft 31 coaxially arranged with the output end of the transmission assembly; a boat-shaped stirring paddle 32, at least two horizontal stirring paddles and a V-shaped stirring paddle 35 are fixedly installed with the stirring shaft 31 from bottom to top. The boat-shaped stirring paddle 32 and the adjacent horizontal stirring paddle, the two adjacent horizontal stirring paddles, and the V-shaped stirring paddle 35 and the adjacent horizontal stirring paddle are all arranged vertically; the boat-shaped stirring paddle 32, the horizontal stirring paddle and the V-shaped stirring paddle 35 are all located in the middle and lower part of the stirring tank body 4, and the upward inclination angle of the outer edge of the V-shaped stirring paddle 35 is greater than the upward inclination angle of the outer edge of the boat-shaped stirring paddle 32.

[0065] There are two horizontal stirring paddles in this embodiment. The horizontal stirring paddles include a first horizontal stirring paddle 33 and a second horizontal stirring paddle 34. In this embodiment, the stirring assembly 3 adopts a four-layer design of a boat-shaped stirring paddle 32, a first horizontal stirring paddle 33, a second horizontal stirring paddle 34, and a V-shaped stirring paddle 35 from bottom to top. The boat-shaped stirring paddle 32 is arranged at the lowermost end of the stirring assembly 3. During the stirring process, upward forces are generated at both ends of the boat-shaped stirring paddle 32, pushing the bottom materials upward in the clockwise direction. The first horizontal stirring paddle 33 and the second horizontal stirring paddle 34 located in the middle position crush and stir the materials, enhancing the powder mixing ability. The V-shaped stirring paddle 35 located at the topmost uses the inclined surface of the V-shape to perform an inclined upward throwing and stirring on the materials. During the upward throwing and stirring, for the materials around the V-shaped stirring paddle 35, the pressure is high on both sides and low in the middle, causing the materials to convect, forming a replacement of the materials, changing the dispersion path of the materials. Through stirring paddles of different heights and specific shapes, the present invention realizes the layered mixing of the materials, avoids mixing dead corners, and effectively improves the mixing efficiency and quality of the materials. At the same time, in the present invention, any adjacent stirring paddles are installed in a mutually perpendicular state, performing multi-level horizontal cutting on the solid materials, arranging the stirring paddles in a 90° staggered manner, making the force evenly distributed, reducing resonance. The upward inclination angle of the outer edge of the upper V-shaped stirring paddle is greater than the upward inclination angle of the lower boat-shaped stirring paddle, which is beneficial for the powder to rise and convect for full mixing and complete discharging, guiding the materials to form a circulating flow in the stirring tank body 4, being able to more effectively crush the materials, optimize the mixing uniformity, and further improve the mixing efficiency and quality.

[0066] As Figures 3 to 6 shown, the boat-shaped stirring paddle 32 in this embodiment includes a boat-shaped body 321 and inclined surfaces arranged at both ends of the boat-shaped body 321. The inclined surfaces and the boat-shaped body 321 form a first cutting edge 322. The included angle β1 between the cutting edge direction of the first cutting edge 322 and the horizontal plane is 40° - 50°. As a preferred implementation manner, in this embodiment, the included angle β1 between the cutting edge direction of the first cutting edge 322 and the inclined surface at the end of the boat-shaped body 321 is 45°. The boat-shaped stirring paddle 32 is located at the bottom layer of the stirring shaft 31. Both ends of the boat-shaped stirring paddle 32 are turned up to form inclined portions. The upper end surfaces of the inclined portions are set as inclined surfaces, and the inclined surfaces are joined with the inclined portions to form acute cutting edges for crushing and cutting the materials during the dispersion process.

[0067] In this embodiment, both the first horizontal stirring paddle 33 and the second horizontal stirring paddle 34 adopt straight-shaped stirring paddles. The first horizontal stirring paddle 33 and the second horizontal stirring paddle 34 both include a horizontal paddle body 331 fixedly installed on the stirring shaft 31 and second cutting edges 332 provided at both ends of the horizontal paddle body 331. The included angle β2 between the cutting edge direction of the second cutting edge 332 and the horizontal plane of the horizontal slurry body 331 is -40° to -50°. During specific rotation, the first horizontal stirring paddle 33 and the second horizontal stirring paddle 34 located at the middle position enhance the powder mixing ability. During the rotation process, the inclined surface (i.e., the cutting edge direction) of the second cutting edge 332 guides the upward movement of the material during shearing. As a preferred embodiment, the included angle β2 between the cutting edge direction of the second cutting edge 332 and the horizontal plane of the horizontal slurry body 331 in this embodiment is -45°. The V-shaped stirring paddle 35 includes: V-shaped bodies 351 symmetrically arranged along the stirring shaft 31 and third cutting edges 352 provided at both ends of the V-shaped bodies 351. The included angle β3 between the cutting edge direction of the third cutting edge 352 and the inclined surface at the end of the V-shaped body 351 is 40° to 50°. As a preferred embodiment, the included angle β3 between the cutting edge direction of the third cutting edge 352 and the inclined surface at the end of the V-shaped body in this embodiment is 45°. When the stirring shaft rotates, the V-shaped stirring paddle 35 located at the top uses the V-shaped inclined surface to perform inclined upward throwing and stirring on the material. During the upward throwing and stirring, for the material around the V-shaped stirring paddle 35, the pressure is high on both sides and low in the middle, forming a replacement of the material. The third cutting edge shears the material once, throws it upward, and then it comes down under the action of the gravity of the material, and the operation forms cycles one by one, realizing the repeated crushing and stirring of the material and improving the mixing efficiency and quality.

[0068] In this embodiment, cutting edges with different cutting edge directions can be adopted for the stirring paddles at different positions and with different shapes. It has been actually proved that when the included angle β1 between the cutting edge direction of the first cutting edge 322 and the inclined surface at the end of the boat-shaped body 321 is 45, the included angle β2 between the cutting edge direction of the second cutting edge 332 and the horizontal plane of the horizontal slurry body 331 is -45°, and the included angle β3 between the cutting edge direction of the third cutting edge 352 and the inclined surface at the end of the V-shaped body 351 is 45°, it can accelerate the longitudinal movement of the material, thereby improving the mixing efficiency.

[0069] Specifically, the first horizontal stirring paddle 33 is perpendicularly installed with the boat-shaped stirring paddle 32, the first horizontal stirring paddle 33 is perpendicularly installed with the second horizontal stirring paddle 34, and the second horizontal stirring paddle 34 is perpendicularly installed with the V-shaped stirring paddle 35. The boat-shaped stirring paddle 32 is located at the bottom of the stirring shaft 31, responsible for preliminary mixing, lifting materials, and crushing. The first horizontal stirring paddle 33 is located above the boat-shaped stirring paddle 32 to further mix the materials. The second horizontal stirring paddle 34 is located above the first horizontal stirring paddle 33 to continuously optimize the mixing effect. The V-shaped stirring paddle 35 is located at the top of the stirring shaft 31, responsible for the final homogenization of the materials. Through the stirring paddles at different heights, stratified mixing of the materials is achieved, avoiding mixing dead corners, increasing material flow, optimizing mixing uniformity, significantly improving the mixing efficiency and quality. All four stirring paddles are provided with blades, and the blade edges of the four stirring paddles are cleverly designed according to their positions. While stratifying and mixing the materials, the crushing efficiency of the materials is accelerated. The vertical setting of the stirring paddles can guide the materials to form a circulating flow inside the equipment, further improving the mixing efficiency.

[0070] As Figure 1 and Figure 2 shown, the drive mechanism 2 in this embodiment includes a motor 21 installed on the base 1, a driving pulley 22 coaxially arranged with the output shaft of the motor 21, and a driven pulley 23 drivingly connected to the driving pulley 22 through a transmission belt. During installation, the driven pulley 23 is coaxially arranged with the stirring shaft 31. When the motor 21 rotates, it drives the stirring shaft 31 to rotate. The motor 21 and the stirring shaft 31 adopt a two-section type, which can be placed in a factory building with a limited height, having a wide application range. On the other hand, it is convenient to observe the mixing state inside the stirring tank body 4. The present invention designs the motor 21 and the stirring shaft 31 in a segmented manner, enabling the rotational speed of the stirring rod to reach a higher speed, such as reaching 100 m / s, and improving the mixing uniformity by means of high-speed stirring.

[0071] The stirring shaft 31 is rotatably installed on the stirring tank body 4 and the base 1 through a double-rotating bearing assembly 5. The double-rotating bearing assembly 5 includes a bearing seat 51 fixedly installed between the base 1 and the stirring tank body 4, a first bearing 52 arranged on the bearing seat 51 for the rotational connection between the stirring shaft 31 and the base 1, and a second bearing 53 arranged on the bearing seat 51 for the rotational connection between the stirring shaft 31 and the stirring tank body 4.

[0072] A sealing assembly 6 is arranged between the double-rotating bearing assembly 5 and the stirring shaft 31, such as Figure 3 , Figure 4 , Figure 7 and Figure 8As shown in the figure, the sealing assembly 6 includes a dry gas seal seat 61 fixedly installed at the upper end of the bearing seat 51, a cover plate 62 covering the lower end face of the dry gas seal seat 61, a first sealing cavity 63, a second sealing cavity 64, an air inlet hole 65, and an air outlet hole 66. Among them, the stirring shaft 31, the dry gas seal seat 61, and the cover plate 62 enclose the first sealing cavity 63. A second sealing cavity 64 is provided between the cover plate 62 and the second bearing 53. The air inlet hole 65 is opened on the bearing seat 51 and the dry gas seal seat 61 and is in gas path communication with the first sealing cavity 63. The air inlet hole 65 is in gas path communication with an external air source. The air outlet hole 66 is opened on the bearing seat 51 and is in communication with the second sealing cavity 64. In the first sealing cavity 63, a first push ring 67, a first stationary ring 68, a rotating ring 69, a second stationary ring 610, and a second push ring 611 are arranged in sequence from bottom to top. The first push ring 67, the first stationary ring 68, the rotating ring 69, the second stationary ring 610, and the second push ring 611 are all sleeved on the stirring shaft 31. The rotating ring 69 rotates with the stirring shaft 31. The first stationary ring 68 and the second stationary ring 610 are in clearance fit with the stirring shaft 31.

[0073] Specifically, the stirring tank body 4 is installed on the base 1 through the bearing seat 51. The first stationary ring 68 and the second stationary ring 610 are respectively installed at the upper and lower ends of the rotating ring 69. The first push ring 67 and the second push ring 611 are respectively arranged on the upper and lower sides of the corresponding stationary rings. During installation, in order to realize the connection between the stirring shaft 31 and the power mechanism and the stirring assembly 3, the stirring shaft 31 passes through the cover plate 62 and the dry gas seal seat 61. An air inlet hole 65 communicating with an external air source is opened on the bearing seat 51 and the dry gas seal seat 64. An air outlet hole 66 is opened on the bearing seat 51 corresponding to the lower part of the air inlet hole 65. During use, clean gas is injected into the first sealing cavity 63 through an external air source. Under the action of pressure, the clean gas flows in the upper and lower directions of the first sealing cavity 63, thereby preventing the powder in the stirring tank body 4 from falling into the bearing seat 51.

[0074] When the power mechanism is started, the rotating ring 69 rotates with the stirring shaft 31, and the first stationary ring 68 and the second stationary ring 610 remain stationary. Under high-speed rotation, a stable gas film is formed in the tiny clearance of the sealing surfaces between the first stationary ring 68 and the rotating ring 69 and between the second stationary ring 610 and the rotating ring 69. On the one hand, it can effectively prevent the powder from leaking into the bearing, avoid the powder entering the equipment from causing corrosion and increasing the friction between components, and further avoid the situation that the service life of the equipment is reduced due to corrosion and friction. On the other hand, it can prevent the powder from leaking, ensure the accuracy of the formula ratio, and effectively improve the mixing effect. The dry gas seal is adopted for the sealing assembly 6 in this embodiment, so that the contact surfaces between the stationary ring and the rotating ring 69 are separated from each other, avoiding the phenomenon of mutual friction and heat generation between the stationary ring and the rotating ring 69, preventing high temperature from being generated inside the sealing assembly 6, and prolonging the service life of the equipment.

[0075] In this embodiment, the thickness of the gas film formed is between several microns and dozens of microns, ensuring that the dynamic seal ring 69 does not come into direct contact with the first static seal ring 68 and the second static seal ring 610. The presence of the gas film reduces the friction and wear between the two static seal rings and the dynamic seal ring 69. Moreover, it can prevent powder leakage, further ensure the accuracy of the formula ratio, and effectively improve the mixing effect. The gas film not only plays a lubricating role but also effectively prevents the leakage of process gas. The gas flows from the high-pressure side (process gas side) to the low-pressure side (atmosphere side), but due to the barrier of the gas film, the leakage amount is very small. During operation, the thickness and pressure distribution of the gas film will be dynamically adjusted to adapt to changes in rotational speed, pressure, and temperature. This dynamic balance ensures the stability and reliability of the seal. The dry gas seal realizes non-contact sealing by forming a stable gas film, and has the characteristics of high efficiency, reliability, and environmental protection. By forming a stable gas film, a high-pressure side is formed inside the seal seat, which can effectively prevent the leakage of the materials in the stirring tank body 4, prevent the backflow and leakage of powder. Since the powder does not leak, it will not corrode the equipment. When stirring, a slightly positive pressure is formed inside the stirring tank body 4, and external gas and water are not easily introduced into the barrel body, avoiding the pollution of the materials. To further ensure the service life of the mixer, the stirring tank body 4 in this embodiment is made of 316L stainless steel material, and an anti-corrosion coating is provided on the inner wall of the stirring tank body 4. The ship-shaped stirring paddle, the horizontal stirring paddle, and the V-shaped stirring paddle all adopt ceramic blades.

[0076] As a preferred embodiment, refer to Figure 9 , in this embodiment, a feeding mechanism 8 for adding materials is provided at the upper part of the stirring tank body 4. Specifically, the feeding mechanism 8 includes a feeding port provided at the top end of the stirring tank body 4, a barrel cover 82 arranged on the stirring tank body 4 corresponding to the feeding port through a buckle 83. The barrel cover 82 realizes the opening / closing of the barrel cover 82 through the buckle 83. The design of the buckle 83 facilitates the opening / closing of the barrel cover 82 and facilitates the feeding into the stirring tank body 4. A discharging mechanism 9 is provided at the lower part of the stirring tank body 4. Specifically, the discharging mechanism 9 includes a discharging port opened on the stirring tank body 4, a discharging plug 92 matched with the discharging port, an opening / closing fixed seat 93 fixedly installed on the outer wall of the stirring tank body 4, a triangular handle 94 rotatably connected to the upper end of the opening / closing fixed seat 93 through a connecting rod 96, and a triangular rotating plate 95 rotatably connected to both the triangular handle 94 and the opening / closing fixed seat 93. The first vertex end of the triangular rotating plate 95 is rotatably connected to the opening / closing fixed seat 93, the second vertex end of the triangular rotating plate 95 is rotatably connected to the triangular handle 94, and the third vertex end of the triangular rotating plate 95 is fixedly installed with the discharging plug 92. When converting from the blocked state to the discharging state, the triangular handle 94 rotates away from the stirring tank body 4, and the discharging plug 92 disengages from the discharging port, as Figure 6 shown, that is, rotates downward.

[0077] In this embodiment, a discharge port is provided at the bottom of the stirring tank body 4. When discharging is not required, the discharge port is tightly plugged by a discharge plug 92, and the discharge plug 92 is opened / closed with the discharge port by pulling a triangular handle 94. When discharging is required, by manually pulling the triangular handle 94, driven by a connecting rod 96 and a triangular rotating plate 95, the discharge plug 92 is disengaged from the discharge port, so as to discharge the mixed material. The operation is convenient and the structure is simple. It should be understood that the discharge mechanism 9 in this embodiment adopts manual control or can also adopt automatic control, and the structure of the discharge mechanism 9 is not absolutely limited here.

[0078] To prevent the service life of components from decreasing due to overheating during the stirring process, in this embodiment, cooling jackets 7 for cooling are provided on both the bearing seat 51 and the stirring tank body 4. It should be understood that water inlets and outlets for cooling water to enter and exit are provided on the corresponding bearing seat 51 and the stirring tank body 4, and the water inlets and outlets are both communicated with the cooling jacket 7 to achieve circulation through the water inlets and outlets, so as to cool and lower the temperature of each component, prevent each component from overheating, and effectively improve the service life of the parts. The cooling jacket 7 on the stirring tank body 4 can also cool the material in the stirring tank body 4, and can effectively prevent the temperature from being too high and damaging the molecular structure of the material.

[0079] As Figure 10 shown, based on the above-mentioned use method of the mixer for crushing and coating all-solid-state electrolyte powder, it includes the following contents:

[0080] Step 1: Add the battery solid electrolyte powder to be crushed into the stirring tank body 4;

[0081] Step 2: Start the external air source to inflate the first sealing cavity 63 through the air inlet hole 65;

[0082] Step 3: Start the driving mechanism 2 to drive the stirring assembly 3 to rotate, and crush and coat the battery solid electrolyte powder in the stirring tank body 4;

[0083] Step 4: After the stirring is completed, stop the driving mechanism 2 and perform the discharging operation;

[0084] Step 5: After the discharging is completed, stop inflating the first sealing cavity 63.

[0085] Specifically, when using the mixer for crushing and coating the all-solid-state electrolyte powder, first add the battery all-solid-state electrolyte powder to be crushed into the stirring tank body 4, start the external air source, inflate the first sealing cavity 63, and then start the motor 21 in the driving mechanism 2. The motor 21 rotates through the belt drive to drive the stirring shaft 31 to rotate. The moving ring 69 rotates with the stirring shaft 31, and the first static ring 68 and the second static ring 610 remain stationary. A stable air film is formed between the contact surfaces between the first static ring 68 and the moving ring 69 and between the second static ring 610 and the moving ring 69, which can effectively improve the sealing performance of the equipment and form a stable air film. On the one hand, it can reduce the friction between parts and extend the service life of the equipment. On the other hand, with good sealing performance, it can effectively prevent material leakage from corroding the equipment. During stirring, the setting of the sealing component 6 makes the inside of the stirring tank body 4 form a slightly positive pressure, making it difficult for external gases or water vapor to enter the stirring tank, which can effectively prevent material contamination and avoid environmental pollution of the material by the outside world, and extend the service life of the equipment. Further, it can ensure the accuracy of the formula ratio and further improve the product quality.

[0086] During the stirring process, the boat-shaped stirring paddle 32, the first horizontal stirring paddle 33, the second horizontal stirring paddle 34, and the V-shaped stirring paddle 35 simultaneously stir and crush the material to ensure the crushing and mixing quality and mixing efficiency. After the stirring is completed, manually pull the triangular handle 94 to first discharge the material in the stirring tank body 4, and then stop inflating the first sealing cavity 63 to ensure that no dust enters the bearing seat 51 during the whole process. It should be understood that during the stirring process, the cooling water circulates continuously in the cooling jackets 7 on the stirring tank body 4 and the bearing seat 51 to cool down the stirring tank body 4, the bearing seat 51 and other components in real time.

[0087] Using the method for using the mixer for crushing and coating the all-solid-state electrolyte powder can improve the mixing efficiency and mixing quality of the material, increase the sealing performance between the stirring tank body 4 and the bearing seat 51, and cool down each component in real time to ensure the service life of each component.

[0088] It should be understood that the specific embodiments described above are only used to explain the present invention and are not used to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A mixer for crushing and coating all-solid-state electrolyte powder, characterized in that, Comprising: A base and a driving mechanism mounted on the base; A stirring assembly, which is drivingly connected to the driving mechanism through a transmission assembly; A stirring tank body, fixedly mounted on the base, and the stirring assembly extends inside the stirring tank body; The stirring assembly includes a stirring shaft coaxially arranged with the output end of the transmission assembly; a boat-shaped stirring paddle, at least two horizontal stirring paddles, and a V-shaped stirring paddle fixedly mounted on the stirring shaft in sequence from bottom to top; The boat-shaped stirring paddle is vertically arranged between the adjacent horizontal stirring paddles, between adjacent horizontal stirring paddles, and between the V-shaped stirring paddle and the adjacent horizontal stirring paddle; the boat-shaped stirring paddle, the horizontal stirring paddles, and the V-shaped stirring paddle are all located in the middle and lower parts of the stirring tank body, and the upward inclination angle of the outer edge of the V-shaped stirring paddle is greater than the upward inclination angle of the outer edge of the boat-shaped stirring paddle.

2. A mixer for crushing and coating an all-solid-state electrolyte powder according to claim 1, characterized in that: The boat-shaped stirring paddle includes a boat-shaped body and first cutting edges arranged at both ends of the boat-shaped body; the included angle β1 between the cutting edge direction of the first cutting edge and the inclined surface at the end of the boat-shaped body is 40° - 50°.

3. A mixer for crushing and coating all-solid-state electrolyte powder according to claim 1, characterized in that, The horizontal stirring paddle adopts a straight-shaped stirring paddle; the horizontal stirring paddle includes a first horizontal stirring paddle and a second horizontal stirring paddle; Both the first horizontal stirring paddle and the second horizontal stirring paddle include: A horizontal paddle body, fixedly mounted on the stirring shaft; Second cutting edges, arranged at both ends of the horizontal paddle body, and the included angle β2 between the cutting edge direction of the second cutting edge and the horizontal plane of the horizontal paddle body is -40° - -50°.

4. A mixer for crushing and coating all-solid-state electrolyte powder according to claim 1, characterized in that, The V-shaped stirring paddle includes: a V-shaped body symmetrically arranged along the stirring axis and third cutting edges arranged at both ends of the V-shaped body; The included angle β3 between the cutting edge direction of the third cutting edge and the inclined surface at the end of the V-shaped body is 40° - 50°.

5. A mixer for crushing and coating all-solid-state electrolyte powder according to claim 1, characterized in that, The driving mechanism includes: A motor mounted on the base; A driving pulley, coaxially arranged with the output shaft of the motor; A driven pulley, drivingly connected to the driving pulley through a transmission belt; The driven pulley is coaxially arranged with the stirring shaft.

6. A mixer for crushing and coating an all-solid-state electrolyte powder, according to claim 1, characterized in that, A feeding mechanism for adding materials is arranged at the upper part of the stirring tank body, and a discharging mechanism is arranged at the lower part of the stirring tank body; The discharging mechanism includes: A discharging port opened on the stirring tank body and a discharging plug matched with the discharging port; An opening and closing fixed seat, fixedly mounted on the outer wall of the stirring tank body; A triangular handle, rotatably connected to the upper end of the opening and closing fixed seat through a connecting rod; A triangular rotating plate, the first vertex end of the triangular rotating plate is rotatably connected to the opening and closing fixed seat, the second vertex end of the triangular rotating plate is rotatably connected to the triangular handle, and the third vertex end of the triangular rotating plate is fixedly mounted on the discharging plug; When converting from the blocked material state to the discharging state, the triangular handle rotates in a direction away from the stirring tank body, and the discharging plug disengages from the discharging port.

7. A mixer for crushing and coating all-solid-state electrolyte powder according to claim 1, characterized in that: The stirring shaft is rotatably mounted on the stirring tank body and the base through a double-rotating bearing assembly; The double-rotating bearing assembly includes a bearing housing fixedly installed between the base and the stirring tank body, a first bearing provided on the bearing housing for the rotational connection between the stirring shaft and the base, and a second bearing provided on the bearing housing for the rotational connection between the stirring shaft and the stirring tank body.

8. A mixer for crushing and coating all-solid-state electrolyte powder according to claim 7, characterized in that, A sealing assembly is provided between the double-rotating bearing assembly and the stirring shaft; The sealing assembly includes: A dry gas seal housing fixedly installed at the upper end of the bearing housing, and a cover plate covering the lower end face of the dry gas seal housing; A first sealing cavity formed by enclosing the stirring shaft, the dry gas seal housing, and the cover plate; A second sealing cavity provided between the cover plate and the second bearing; An air inlet hole opened on the bearing housing and the dry gas seal housing, one end of the air inlet hole is communicated with the first sealing cavity, and the other end is communicated with an external gas source gas path; An air outlet hole opened on the bearing housing and communicated with the second sealing cavity by a gas path; And a first push ring, a first stationary ring, a moving ring, a second stationary ring, and a second push ring sequentially arranged from bottom to top in the first sealing cavity; the first push ring, the first stationary ring, the moving ring, the second stationary ring, and the second push ring are all sleeved on the stirring shaft; the moving ring rotates with the stirring shaft, and the first stationary ring and the second stationary ring are in clearance fit with the stirring shaft.

9. A mixer for crushing and coating all-solid-state electrolyte powder according to claim 8, characterized in that, Cooling jackets for cooling are provided on both the bearing housing and the stirring tank body.

10. The method of using a mixer for crushing and coating all-solid-state electrolyte powder according to claim 8, characterized in that It includes the following steps: Add the battery solid electrolyte powder to be pulverized into the stirring tank body; Start the external gas source to inflate the first sealing cavity through the air inlet hole; Start the driving mechanism to drive the stirring assembly to rotate, and crush and coat the battery solid electrolyte powder in the stirring tank body; After the stirring is completed, stop the driving mechanism and perform the discharging operation; After the discharging is completed, stop supplying air to the first sealing cavity 63.

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