Ultrasonic stirring and dispersing device

Abstract

The utility model belongs to the technical field of lithium battery material dispersion, and particularly relates to an ultrasonic stirring and dispersing device which comprises a stirring tank, a refrigerating mechanism, a screw pump, a plurality of ultrasonic assemblies and a circulating pipeline, the ultrasonic assemblies are communicated with the stirring tank, the stirring tank is connected with the refrigerating mechanism, and the screw pump is connected with the circulating pipeline. Two ends of the screw pump are respectively communicated with the stirring tank and the ultrasonic assembly; the stirring tank is filled with slurry, the screw pump is used for providing power for the slurry to flow along the circulating pipeline, the ultrasonic assembly is used for carrying out ultrasonic dispersion on the slurry, and the refrigeration mechanism is used for cooling the slurry; according to the utility model, high-frequency vibration is generated in slurry through ultrasonic waves, the purposes of uniform dispersion, crushing and grinding can be achieved in a micro area within a short time, the slurry is dispersed through multi-stage ultrasonic waves, the slurry dispersion effect can be better ensured, and the slurry dispersion efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery material dispersion, and in particular relates to an ultrasonic stirring and dispersing device. Background Art

[0002] The slurry of lithium batteries is composed of multiple components, including active materials, conductive materials, binders, solvents and other processing materials. Currently, the main method of mixing battery slurry is mechanical stirring. Mechanical stirring and mixing technology is used for the dispersion of highly liquid-absorbing materials, which requires longer continuous stirring and has low efficiency.

[0003] Ultrasonic waves can generate strong high-frequency vibrations in the slurry, and even produce cavitation and strong diffusion effects, which can achieve the purpose of uniform dispersion and crushing and grinding in the micro-area in a short time. It also has a good deagglomeration effect on materials that are easy to agglomerate, such as graphene and nanomaterials. The use of ultrasonic waves can solve the problem of adding dispersants to these materials. Therefore, it is suitable for mixing lithium battery slurry.

[0004] The use of ultrasonic dispersion grinding of slurry breaks through the traditional graphene grinding technology. The traditional technology uses a grinder to grind graphene mechanically on the grinder. During the grinding process, some impurities generated by grinding will enter the graphene, making it difficult to screen. The graphene prepared by the grinder has a larger particle diameter, a poor degree of exfoliation, and poor quality of graphene.

[0005] Based on this, it is necessary to improve the defects of the prior art to overcome the deficiencies in practical applications. Utility Model Content

[0006] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the purposes of the present invention is to provide an ultrasonic stirring and dispersing device that meets one or more of the above-mentioned needs.

[0007] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides an ultrasonic stirring and dispersing device, comprising a stirring tank, a refrigeration mechanism, a screw pump, a plurality of ultrasonic components and a circulation pipeline, wherein the plurality of ultrasonic components are connected to the stirring tank, the stirring tank is connected to the refrigeration mechanism, and the two ends of the screw pump are respectively connected to the stirring tank and the ultrasonic components; the stirring tank is filled with slurry, the screw pump is used for providing power for the slurry to flow along the circulation pipeline, the ultrasonic component is used for ultrasonically dispersing the slurry, and the refrigeration mechanism is used for cooling the slurry.

[0009] As a preferred solution, a plurality of the ultrasonic components are connected to the circulation pipeline in parallel to perform graded dispersion on the slurry in the circulation pipeline.

[0010] As a preferred embodiment, each of the ultrasonic components includes an ultrasonic head, an amplitude modulator, a transducer and a dispersion chamber, the transducer is connected to the amplitude modulator, the amplitude modulator is connected to the ultrasonic head, the dispersion chamber is connected to the circulation pipe, and the ultrasonic head is located in the dispersion chamber to perform ultrasonic vibration on the slurry entering the dispersion chamber.

[0011] As a preferred solution, the dispersion chamber is provided with an inlet end and an outlet end, the inlet end is arranged opposite to the ultrasonic head, and the outlet end is arranged at the lower part of the dispersion chamber.

[0012] As a preferred solution, the circulation pipeline is provided with a filter and an iron remover, and the filter and the iron remover are arranged between the ultrasonic component and the screw pump.

[0013] As a preferred solution, the stirring tank is equipped with a driving unit and a stirring paddle, wherein the driving unit is arranged on the stirring tank, and the stirring paddle is arranged inside the stirring tank, and the driving unit is transmission-connected to the stirring paddle to stir the slurry.

[0014] As a preferred solution, the ultrasonic component is connected to a control box, and the control box is used to control the ultrasonic component to perform ultrasonic vibration to achieve dispersion of the slurry.

[0015] As a preferred solution, the refrigeration mechanism includes a water chiller, and the water chiller is used to cool the mixing tank.

[0016] As a preferred solution, the circulation pipeline is provided with a pipeline compensator.

[0017] As a preferred solution, the stirring tank is provided with a plurality of inlets and outlets.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model discloses an ultrasonic stirring and dispersing device, which generates high-frequency vibration in the slurry through ultrasonic waves, and even generates cavitation and a strong diffusion effect, so as to achieve the purpose of uniform dispersion and crushing and grinding in a micro area in a short time, and has a good depolymerization effect on graphene, nanomaterials and other materials that are easy to agglomerate.

[0020] The utility model discloses an ultrasonic stirring and dispersing device, which disperses slurry through multi-stage ultrasound, can better ensure the slurry dispersing effect and improve the slurry dispersing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of an ultrasonic stirring and dispersing device according to an embodiment of the present application;

[0023] Figure 2 It is a structural schematic diagram of a stirring tank according to an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of the connection structure of the ultrasonic component of an embodiment of the present application;

[0025] Figure 4 is a cross-sectional view of an ultrasonic component according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0027] In the description of the embodiments of the present application, terms such as "upper", "lower", "front", and "rear" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] According to some embodiments of the present application, Figures 1 to 4 As shown, an ultrasonic stirring and dispersing device is provided, comprising a stirring tank 1, a refrigeration mechanism 2, a screw pump 3, several ultrasonic components 4 and a circulation pipeline 5, wherein the several ultrasonic components 4 are connected to the stirring tank 1, the stirring tank 1 is connected to the refrigeration mechanism 2, and both ends of the screw pump 3 are respectively connected to the stirring tank 1 and the ultrasonic components 4; the stirring tank 1 is filled with slurry, the screw pump 3 is used to provide power for the slurry to flow along the circulation pipeline 5, the ultrasonic components 4 are used to ultrasonically disperse the slurry, and the refrigeration mechanism 2 is used to cool the slurry.

[0029] Specifically, Figure 3As shown, several ultrasonic components 4 are connected to the circulation pipeline 5 in parallel to form multiple ultrasonic dispersion branches, and the ultrasonic frequencies and powers of the multiple ultrasonic components 4 can be controlled individually to perform graded dispersion treatment on the slurry in the circulation pipeline 5. The dispersion efficiency of the slurry can be improved by multi-stage ultrasonic dispersion, and if one of the ultrasonic components is damaged, it will not affect the normal operation of other branches. In a specific embodiment, there are at least two ultrasonic components connected in parallel in the circulation pipeline, which can be set according to actual needs.

[0030] In some embodiments, multiple ultrasonic components 4 can also be connected in series in the circulation pipeline 5 to form a single dispersion pipeline. By controlling the ultrasonic vibration frequency and power of different ultrasonic components 4, the slurry in the single dispersion pipeline can be ultrasonically dispersed in multiple stages.

[0031] Furthermore, each ultrasonic component 4 includes an ultrasonic head 41, an amplitude modulator 42, a transducer 43, a dispersion chamber 44 and a control valve 45. The transducer 43 is connected to the amplitude modulator 42, the amplitude modulator 42 is connected to the ultrasonic head 41, the dispersion chamber 44 is connected to the circulation pipe 5, and the ultrasonic head 41 is located in the dispersion chamber 44 to perform ultrasonic vibration on the slurry entering the dispersion chamber 44. The flow rate and flow rate of the slurry flowing into the dispersion chamber can be individually controlled by the control valve 45.

[0032] Furthermore, if Figure 4 As shown, the dispersion chamber 44 is provided with an inlet end 441 and an outlet end 442, the inlet end 441 is arranged opposite to the ultrasonic head 41, and the outlet end 442 is arranged at the lower part of the dispersion chamber 44. The dispersion chamber 44 is connected to the upstream circulation pipe 5 through the inlet end 441, the slurry in the stirring tank 1 is pumped out through the screw pump 3 and enters the inlet end 442 of the dispersion chamber 44 through the circulation pipe 5, the slurry is sprayed on the ultrasonic head 41 and fills the dispersion chamber 4, and the slurry is dispersed and ground by the ultrasonic head 41; the dispersion chamber 44 is connected to the downstream circulation pipe 5 through the outlet end 442, and the slurry after ultrasonic treatment enters the circulation pipe 5 through the outlet end 442 and flows into the stirring tank 1, forming a closed loop of slurry circulation flow in turn.

[0033] Furthermore, a transition arc surface 411 is provided at the end of the ultrasonic head 41, and the slurry sprayed into the dispersion chamber 44 immerses the ultrasonic head 41. Since the slurry in the dispersion chamber 44 is in contact with the ultrasonic head 41 by immersion, and the transition arc surface 411 enables the ultrasonic head 41 and the slurry to have a larger contact area, the ultrasonic vibration frequency is guaranteed to be the highest when the slurry contacts the ultrasonic head 41, thereby improving the effect of ultrasonic dispersion and grinding, and the power requirement is low, which helps to save ultrasonic vibration energy.

[0034] Since the slurry contains metal impurities and debris, a filter 51 and an iron remover 52 are provided in the circulation pipeline. The filter 51 and the iron remover 52 are provided between the ultrasonic component 4 and the screw pump 3. They can remove the impurities and debris in the slurry and ensure the cleanliness of the slurry in the circulation pipeline 5 to meet the process requirements of slurry preparation.

[0035] According to some embodiments of the present application, the stirring tank 1 is equipped with a driving unit 12 and a stirring paddle 13. The driving unit 12 is arranged on the stirring tank 1, and the stirring paddle 13 is arranged inside the stirring tank 1. The driving unit 12 is transmission-connected to the stirring paddle 13 to stir the slurry.

[0036] Specifically, the driving part 13 can be set as a servo motor, and the stirring paddle 13 is connected to the servo motor so that the stirring paddle 13 continuously rotates in the stirring tank 1 to continuously stir the slurry. The stirring process driven by the servo motor can control the stirring rate and improve the control accuracy.

[0037] According to some embodiments of the present application, the ultrasonic component 4 is connected to the control box 6, and the control box 6 is used to control the ultrasonic component 4 to perform ultrasonic vibration to achieve dispersion of the slurry. In order to achieve the dispersion effect, the control box must control the ultrasonic frequency of the entire system to reach 20KHz and the ultrasonic power to reach 6kW.

[0038] Due to the processing requirements of the slurry, the temperature of the preparation process needs to be less than 45°, so the temperature of the stirring tank needs to be controlled. The mixed slurry is continuously stirred by the stirring paddle, and the temperature of the stirring tank will continue to rise. In order to control the temperature of the stirring tank to be kept below 45°, a refrigeration mechanism 2 is set to cool it down. The refrigeration mechanism 2 includes a chiller, which is used to cool the stirring tank.

[0039] Specifically, a jacket 14 is provided on the periphery of the stirring tank 1, and chilled water is transported to the jacket 14 of the stirring tank 1 through a water chiller to circulate and cool the stirring tank 1, thereby ensuring that the slurry temperature in the stirring tank is maintained below 45° during the entire ultrasonic dispersion and grinding process.

[0040] According to some embodiments of the present application, a pipeline compensator 53 is provided in the circulation pipeline 5 to compensate for the hard pipeline, thereby reducing the installation error of components and improving the sealing of the pipeline.

[0041] According to some embodiments of the present application, the stirring tank 1 is provided with several inlets 11, including a powder inlet and a liquid inlet, through which powders such as graphene are added, and water is added through the liquid inlet, so that different mixtures can be fed separately. A discharge port 15 is provided at the bottom side of the stirring tank, through which the prepared slurry is discharged.

[0042] During use, the slurry in the mixing tank is pumped out by the screw pump and flows through the screw pump along the circulation pipe into the ultrasonic component in turn. After the slurry is dispersed by the ultrasonic component, it enters the mixing tank again. The slurry is continuously stirred by the mixing tank, and the slurry is stirred and dispersed in turn to achieve the particle requirements of the slurry. The slurry can be circulated and transported by the screw pump throughout the working process to ensure the circulation, dispersion and stirring of the slurry.

[0043] Before entering the ultrasonic dispersion grinding, a temperature detection sensor and a pressure detection sensor can also be set in the circulation pipeline. When the temperature and pressure do not meet the requirements, the system needs to alarm and automatically adjust to ensure the maximum ultrasonic grinding effect.

[0044] An ultrasonic stirring powder dispersion device provided in an embodiment of the present application generates high-frequency vibrations in the slurry through ultrasound, and even generates cavitations and a strong diffusion effect, so as to achieve the purpose of uniform dispersion and dispersed grinding in a micro-region in a short time, and also has a good deagglomeration effect on slurries that are easy to agglomerate, such as graphene and nanomaterials.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] The above description is only a detailed description of the preferred embodiments and principles of the present application. For ordinary technicians in this field, according to the ideas provided by the present utility model, there will be changes in the specific implementation methods, and these changes should also be regarded as the scope of protection of the present application.

Claims

1. An ultrasonic stirring and dispersing device, characterized in that: It includes a stirring tank, a refrigeration mechanism, a screw pump, several ultrasonic components and a circulation pipeline, wherein the several ultrasonic components are connected to the stirring tank, the stirring tank is connected to the refrigeration mechanism, and the two ends of the screw pump are respectively connected to the stirring tank and the ultrasonic components; the stirring tank is filled with slurry, the screw pump is used to provide power for the slurry to flow along the circulation pipeline, the ultrasonic components are used to ultrasonically disperse the slurry, and the refrigeration mechanism is used to cool the slurry.

2. An ultrasonic stirring and dispersing device according to claim 1, characterized in that: A plurality of the ultrasonic components are connected to the circulation pipeline in parallel to perform graded dispersion on the slurry in the circulation pipeline.

3. The ultrasonic stirring and dispersing device according to claim 1, characterized in that: Each of the ultrasonic components comprises an ultrasonic head, an amplitude modulator, a transducer and a dispersion chamber, wherein the transducer is connected to the amplitude modulator, the amplitude modulator is connected to the ultrasonic head, the dispersion chamber is connected to the circulation pipeline, and the ultrasonic head is located in the dispersion chamber to perform ultrasonic vibration on the slurry entering the dispersion chamber.

4. The ultrasonic stirring and dispersing device according to claim 3, characterized in that: The dispersion chamber is provided with an inlet end and an outlet end, the inlet end is arranged opposite to the ultrasonic head, and the outlet end is arranged at the lower part of the dispersion chamber.

5. The ultrasonic stirring and dispersing device according to claim 1, characterized in that: The circulation pipeline is provided with a filter and an iron remover, and the filter and the iron remover are arranged between the ultrasonic component and the screw pump.

6. The ultrasonic stirring and dispersing device according to claim 1, characterized in that: The stirring tank is equipped with a driving part and a stirring paddle, wherein the driving part is arranged on the stirring tank, and the stirring paddle is arranged inside the stirring tank, and the driving part is transmission-connected with the stirring paddle to stir the slurry.

7. The ultrasonic stirring and dispersing device according to claim 1, characterized in that: The ultrasonic component is connected to a control box, and the control box is used to control the ultrasonic component to perform ultrasonic vibration to achieve dispersion of the slurry.

8. The ultrasonic stirring and dispersing device according to claim 1, characterized in that: The refrigeration mechanism comprises a water chiller, and the water chiller is used to cool the mixing tank.

9. The ultrasonic stirring and dispersing device according to claim 1, characterized in that: The circulation pipeline is provided with a pipeline compensator.

10. The ultrasonic stirring and dispersing device according to claim 1, characterized in that: The stirring tank is provided with a plurality of material inlets and material outlets.

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