Ultrasonic stirring machine

Abstract

The invention relates to the technical field of slurry preparation, in particular to an ultrasonic stirrer which comprises a vibration base, a stirring barrel is connected to the vibration base, the vibration base is used for transmitting vibration to the stirring barrel, a driving motor is fixedly connected to the top of the stirring barrel, and the output end of the driving motor is connected with a porous blade extending into the stirring barrel. Ultrasonic vibration rods are mounted on the porous blades and synchronously rotate along with the porous blades. Through multi-dimensional mixing design, temperature control optimization and structure innovation, the problems of incomplete dispersion, low efficiency and temperature control defects in traditional battery slurry stirring are effectively solved, and through the synergistic effect of mechanical stirring and ultrasonic waves, the dispersion uniformity of the slurry is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slurry preparation, and in particular to an ultrasonic stirring machine. BACKGROUND

[0002] Slurry stirring of the battery is the core link of electrode manufacturing, and its uniformity directly affects the battery capacity, cycle life and safety, and the current industry is facing three technical bottlenecks: 1, incomplete dispersion: traditional mechanical stirring (such as double planetary stirring machine) is difficult to break up nano-sized agglomerates (such as conductive agent, active material); 2, low efficiency: high solid content slurry (viscosity > 1000 Pa·s) needs 6-8 hours stirring, and there are container wall dead angles, frequent manual scraping introduces pollution; 3, temperature control defects: stirring generates heat (> 55℃) to cause binder degradation, and the external cooling system responds with a lag, and the temperature fluctuation is > ± 5℃; In the prior art, although the single ultrasonic dispersion can disperse the nanoparticles, the energy consumption is high and local overheating is easy to occur; the pure mechanical vibration can only realize anti-settling, cannot optimize the micro-dispersion, and cannot fully mix the slurry in multiple dimensions, so there is an urgent need to design an ultrasonic stirring machine to solve the problem of insufficient mixing of the slurry. SUMMARY

[0003] In view of the above problems in the prior art, the present application provides an ultrasonic stirring machine.

[0004] The above application object of the present application is realized by the following technical scheme: An ultrasonic stirring machine, comprising: a vibrating base, a stirring barrel connected to the vibrating base, the vibrating base being used to transmit vibration to the stirring barrel, a driving motor fixedly connected to the top of the stirring barrel, a multi-hole paddle extending into the interior of the stirring barrel connected to the output end of the driving motor, an ultrasonic vibration rod installed on the multi-hole paddle, the ultrasonic vibration rod rotating synchronously with the multi-hole paddle.

[0005] Preferably, the bottom surface of the stirring barrel is an inclined surface to realize fluidized mixing by gravity.

[0006] Preferably, the inclination angle of the inclined surface is 1-10 degrees.

[0007] Preferably, the stirring barrel bottom surface and the vibrating base are connected through an inclined compensation block, and the angle of the inclined compensation block matches the inclined surface of the stirring barrel.

[0008] Preferably, the multi-hole paddle comprises a rotating shaft fixedly connected to the output end of the driving motor, rectangular vanes and special-shaped vanes fixedly connected to the rotating shaft, and the rectangular vanes and special-shaped vanes are distributed along the circumferential surface of the rotating shaft.

[0009] Preferably, the rectangular fan blade comprises a first frame, and a first hole plate is fixedly connected to the first frame, and the first hole plate has a cross-section in the shape of a Chinese character 'yi'; the special-shaped fan blade comprises a second frame, and a plurality of second hole plates are fixedly connected to the second frame, and the second hole plates have cross-sections in the shape of a Chinese character 'n', and gaps are arranged between adjacent second hole plates.

[0010] Preferably, a mounting beam is connected between the rectangular fan blade and the special-shaped fan blade, and the ultrasonic vibration rod is fixedly connected to the mounting beam.

[0011] Preferably, the vibration base comprises an internally hollow bottom ring seat, the bottom ring seat is fixedly connected to the ground, damping adjusters are uniformly distributed on the top surface of the bottom ring seat in the circumferential direction, a connecting seat is connected to one end of each damping adjuster away from the bottom ring seat, the connecting seat is fixedly connected to the stirring barrel, and a vibration motor is fixedly connected to the connecting seat and located in the hollow position of the bottom ring seat.

[0012] Preferably, a cooling water inlet is arranged at the bottom of the stirring barrel, a cooling water outlet and a temperature sensor are arranged at the top of the stirring barrel, a cooling flow channel is arranged between the cooling water inlet and the cooling water outlet, the temperature sensor detects the temperature inside the stirring barrel, and the cooling flow channel cools the stirring barrel.

[0013] Preferably, a viscosity sensor is arranged at the bottom of the stirring barrel to detect the viscosity of the slurry in the stirring barrel; a vacuumizing port is arranged at the top of the stirring barrel to perform vacuum treatment on the stirring barrel; and an observation window is arranged at the top of the stirring barrel to observe the internal condition of the stirring barrel.

[0014] Compared with the prior art, the present application has the following beneficial effects: The present application effectively solves the problems of incomplete dispersion, low efficiency and temperature control defects in traditional battery slurry stirring through multi-dimensional mixing design, temperature control optimization and structural innovation, and significantly improves the dispersion uniformity of the slurry through the synergistic effect of mechanical stirring and ultrasonic waves. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a first perspective view of the overall structure of the ultrasonic stirrer of the present application; Figure 2 is a schematic view of the multi-hole paddle structure of the present application; Figure 3 is a schematic view of the bottom structure of the ultrasonic stirrer of the present application; Figure 4 is a second perspective view of the overall structure of the ultrasonic stirrer of the present application.

[0016] Signs: 1, vibration base; 101, bottom ring seat; 102, damping adjuster; 103, connecting seat; 104, vibration motor; 2, stirring barrel; 201, inclined surface; 202, cooling water inlet; 203, cooling water outlet; 3, driving motor; 4, porous paddle; 401, rotating shaft; 402, rectangular fan blade; 4021, first frame; 4022, first hole plate; 403, special-shaped fan blade; 4031, second frame; 4032, second hole plate; 404, mounting beam; 5, ultrasonic vibration rod; 6, inclination compensation block; 7, temperature sensor; 8, viscosity sensor; 9, vacuumizing port; 10, observation window; 11, electric control box. DETAILED DESCRIPTION

[0017] The exemplary embodiments of this application are described herein with reference to the accompanying drawings, which are included to provide a thorough understanding of embodiments of the application by a person of ordinary skill in the art, and should not be construed as a literal description of all embodiments falling within the scope of the application. Accordingly, those of ordinary skill in the art will recognize that modifications and variations of the embodiments described herein can be made without departing from the scope and spirit of the application. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0018] It should be noted that the terms "first", "second", and the like in the description do not necessarily connote an ordinal or chronological sequence, but are used merely to distinguish one from another. It will be understood by those skilled in the art that the data so distinguished can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be carried out in other sequences than those illustrated or described herein. The implementations described in the following exemplary embodiments are not meant to represent all implementations consistent with the present disclosure.

[0019] In addition, the term "and / or" in this document is merely a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects unless otherwise specified.

[0020] The following description refers to the accompanying drawings, which illustrate preferred embodiments of the application. Figure 1 to the accompanying drawings Figure 4 An ultrasonic mixer is described.

[0021] As Figure 1 and Figure 2As shown in the figure, an ultrasonic mixer comprises a vibrating base 1, a stirring barrel 2 connected to the vibrating base 1, the vibrating base 1 being used to transmit vibration to the stirring barrel 2, a driving motor 3 fixedly connected to the top of the stirring barrel 2, a multi-hole paddle 4 extending into the inside of the stirring barrel 2 connected to the output end of the driving motor 3, and an ultrasonic vibrating rod 5 installed on the multi-hole paddle 4, the ultrasonic vibrating rod 5 rotating synchronously with the multi-hole paddle 4. Specifically, the device combines the vibrating base 1 and the multi-hole paddle 4 to realize mechanical stirring, and at the same time, generates high-frequency vibration energy through the ultrasonic vibrating rod 5, so as to significantly improve the dispersion uniformity of the slurry through the synergistic effect of mechanical stirring and ultrasonic waves.

[0022] Optionally, the driving motor 3 can be a synchronous motor or a stepping motor.

[0023] As preferred, as shown in the figure, the bottom surface of the stirring barrel 2 is an inclined surface 201 to perform fluidization mixing through gravity. Specifically, the inclined surface 201 promotes fluidization mixing through gravity, reduces the dead angle area at the bottom of the container wall, avoids slurry deposition, optimizes the slurry flow path, and improves the mixing efficiency. Figure 1

[0024] As preferred, the inclination angle of the inclined surface 201 is 1-10 degrees, which can effectively promote fluidization mixing and does not cause too fast flow or accumulation of the slurry. By optimizing the inclination angle, the mixing efficiency and stability are balanced, and the uniformity of the slurry in the stirring barrel 2 is improved.

[0025] As preferred, the stirring barrel 2 is connected to the vibrating base 1 through an inclined compensation block 6, the angle of the inclined compensation block 6 matches the inclined surface 201 of the stirring barrel 2. Specifically, the inclined compensation block 6 matches the inclination angle of the stirring barrel 2 with the vibrating base 1, ensures that the vibration energy is effectively transmitted to the stirring barrel 2, improves the vibration transmission efficiency, enhances the mixing effect, and ensures the stable operation of the stirring barrel 2 during the vibration process.

[0026] As preferred, as shown in the figure, the multi-hole paddle 4 comprises a rotating shaft 401 fixedly connected to the output end of the driving motor 3, a rectangular fan blade 402 and a special-shaped fan blade 403 fixedly connected to the rotating shaft 401, and the rectangular fan blade 402 and the special-shaped fan blade 403 are distributed along the side surface of the rotating shaft 401 in a staggered and uniform manner. Through the cooperation of the rectangular fan blade 402 and the special-shaped fan blade 403, high-efficiency stirring of high-solid-content slurry is realized, and the problem of uneven mixing caused by single structure of the traditional stirring paddle is avoided. Figure 2

[0027] ​​As preferred, the rectangular fan blade 402 comprises a first frame 4021, and a first hole plate 4022 is fixedly connected to the first frame 4021, and the first hole plate 4022 is in a section of a character; the special-shaped fan blade 403 comprises a second frame 4031, and a plurality of second hole plates 4032 are fixedly connected to the second frame 4031, and the second hole plates 4032 are in a section of a V character, and gaps are arranged between adjacent second hole plates 4032, and specifically, the V-shaped hole plate design can guide the slurry flow, and further optimize the dispersion effect, and the character-shaped hole plate and the V-shaped hole plate are used in cooperation to form a multi-dimensional stirring flow field, and the mixing uniformity is improved, wherein the first hole plate 4022 and the second hole plate 4032 are both provided with micron-level array holes with a pore size of 50-300 μm, and high-speed micro-jets are formed during rotation to enhance local shear force and break 1-10 μm agglomerates.

[0028] As preferred, the mounting beam 404 is connected between the rectangular fan blade 402 and the special-shaped fan blade 403, and the ultrasonic vibration rod 5 is fixedly connected to the mounting beam 404, so that the ultrasonic vibration energy is uniformly distributed in the stirring area, and optionally, the power of the ultrasonic vibration rod 5 is 200-3000 W, and the frequency is 20 KHz-60 KHz, so that a cavitation bubble breakage shock wave is generated to specially attack <100 nm nano-agglomerates, complement the mechanical stirring, and increase the mixing efficiency.

[0029] As preferred, as shown in Figure 3 The vibration base 1 comprises an inner hollow bottom ring seat 101, the bottom ring seat 101 is fixedly connected to the ground, the top surface of the bottom ring seat 101 is circumferentially uniformly distributed with a damping adjuster 102, one end of the damping adjuster 102 away from the bottom ring seat 101 is connected with a connecting seat 103, the connecting seat 103 is fixedly connected with the stirring barrel 2, and the vibration motor 104 is fixedly connected to the connecting seat 103 and located in the hollow position of the bottom ring seat 101, and specifically, the bottom ring seat 101 is fixed to the ground, the top surface is circumferentially uniformly distributed with the damping adjuster 102, the damping adjuster 102 transmits vibration to the stirring barrel 2 through the connecting seat 103 and adjusts the vibration amplitude, the vibration frequency and amplitude are optimized through the damping adjuster 102, damage to the equipment or splashing of the slurry caused by excessive vibration is avoided, and thus the stability and mixing efficiency of the stirring barrel 2 are improved.

[0030] As preferred, as shown in Figure 4As shown, the bottom of the stirring barrel 2 is provided with a cooling water inlet 202, the top of the stirring barrel 2 is provided with a cooling water outlet 203 and a temperature sensor 7, a cooling flow channel is arranged between the cooling water inlet 202 and the cooling water outlet 203, the temperature sensor 7 detects the temperature inside the stirring barrel 2, the cooling flow channel cools the stirring barrel 2, specifically, real-time temperature control reduces the risk of over-heating of the slurry and improves the stability of the stirring process, optionally, when the temperature of the slurry in the stirring barrel 2 is greater than 50 DEG C, the cooling flow channel is automatically triggered to perform liquid cooling, so as to maintain the temperature at 45±2 DEG C, realizing temperature control closed loop.

[0031] As preferred, as shown in the drawings, Figure 1 As shown, the bottom of the stirring barrel 2 is provided with a viscosity sensor 8 to detect the viscosity of the slurry in the stirring barrel 2; the top of the stirring barrel 2 is provided with a vacuum port 9 for vacuum treatment of the stirring barrel 2; the top of the stirring barrel 2 is provided with an observation window 10 for observing the internal condition of the stirring barrel 2; The temperature sensor 7, the viscosity sensor 8, the cooling flow channel, the vibration motor 104, the driving motor 3, the ultrasonic vibration rod 5 and other structural components are electrically connected in the electric control box 11, so as to realize intelligent control, and the electric control box 11 controls each component by dynamic coupling algorithm, for example, according to the real-time data of the viscosity of the slurry, the power ratio of the vibration motor 104, the driving motor 3 and the ultrasonic vibration rod 5 is automatically adjusted, for example, ultrasonic pulse is started in the high viscosity stage, and mechanical vibration is strengthened in the low viscosity stage, at the same time, the vacuum port 9 is used to form a vacuum environment in the stirring barrel 2 to inhibit bubble generation, for example, the vacuum environment is pumped to-0.098 MPa to inhibit bubble generation and avoid micro-hole jet failure.

[0032] Further, the comparison table of the conventional scheme and the present application is shown in Table 1: Table 1 Index Traditional scheme Invention scheme Promotion effect Stirring time 6-8 hours 2.5-3.5 hours Time saving >40% Particle size uniformity D90>1 μm D90<500 nm Particle size mixing effect >50% Viscosity consistency Deviation >15% Deviation <5% Viscosity mixing effect >3 times Energy consumption High (ultrasonic independent) Medium (coordinated power reduction) Energy consumption reduction 30% The present application effectively solves the problems of incomplete dispersion, low efficiency and temperature control defects in the traditional battery slurry stirring by multi-dimensional mixing design, temperature control optimization and structural innovation, and significantly improves the dispersion uniformity of the slurry through the synergistic effect of mechanical stirring and ultrasonic waves.

[0033] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An ultrasonic mixer, characterized in that, include: A vibrating base is attached to a mixing tank. The vibrating base is used to transmit vibration to the mixing tank. A drive motor is fixedly connected to the top of the mixing tank. The output end of the drive motor is connected to a porous blade that extends into the mixing tank. An ultrasonic vibrating rod is installed on the porous blade. The ultrasonic vibrating rod rotates synchronously with the porous blade.

2. The ultrasonic mixer as described in claim 1, characterized in that, The bottom of the mixing tank is inclined to allow for fluidized mixing by gravity.

3. An ultrasonic mixer as described in claim 2, characterized in that, The inclination angle of the inclined surface is 1 to 10 degrees.

4. An ultrasonic mixer as described in claim 2, characterized in that, The bottom of the mixing tank is connected to the vibrating base by an inclined compensation block, the angle of which matches the inclined surface of the mixing tank.

5. An ultrasonic mixer as described in claim 1, characterized in that, The porous blade includes a rotating shaft, which is fixedly connected to the output end of a drive motor. Rectangular and irregularly shaped blades are fixedly connected to the rotating shaft, and the rectangular and irregularly shaped blades are evenly distributed circumferentially along the side of the rotating shaft.

6. An ultrasonic mixer as described in claim 5, characterized in that, The rectangular fan blade includes a first frame, on which a first perforated plate is fixedly connected. The first perforated plate has a straight cross-section. The irregular fan blade includes a second frame, on which multiple second perforated plates are fixedly connected. The second perforated plates have a V-shaped cross-section, and gaps are provided between adjacent second perforated plates.

7. An ultrasonic mixer as described in claim 5, characterized in that, A mounting beam connects the rectangular and irregularly shaped fan blades, and the ultrasonic vibrator is fixedly connected to the mounting beam.

8. An ultrasonic mixer as described in claim 1, characterized in that, The vibrating base includes a hollow bottom ring seat, which is fixedly connected to the ground. Damping adjusters are evenly distributed around the top surface of the bottom ring seat. A connecting seat is connected to the end of the damping adjuster away from the bottom ring seat. The connecting seat is fixedly connected to the mixing tank. A vibrating motor is fixedly connected to the connecting seat and the vibrating motor is located in the hollow part of the bottom ring seat.

9. An ultrasonic mixer as described in claim 1, characterized in that, The mixing tank has a cooling water inlet at the bottom and a cooling water outlet and temperature sensor at the top. A cooling channel is provided between the cooling water inlet and the cooling water outlet. The temperature sensor detects the internal temperature of the mixing tank, and the cooling channel cools the mixing tank.

10. An ultrasonic mixer as described in claim 1 or 9, characterized in that, A viscosity sensor is installed at the bottom of the mixing tank to detect the viscosity of the slurry inside; a vacuum port is installed at the top of the mixing tank for vacuum treatment inside the tank; and an observation window is installed at the top of the mixing tank for observing the internal conditions.

Images