CN215612607U

CN215612607U - Spray coating system for producing ternary cathode material

Info

Publication number: CN215612607U
Application number: CN202121903211.8U
Authority: CN
Inventors: 钟欢; 任浩华; 蒋文; 龚黎明
Original assignee: Jiangsu Xiangying New Energy Technology Co ltd
Current assignee: Jiangsu Xiangying New Energy Technology Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-01-25
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a spray coating system for producing a ternary cathode material, which comprises a mixing container, a spraying device arranged at the upper part of the mixing container, and a stirring device arranged at the lower part of the mixing container and used for stirring materials in the mixing container; wherein, atomizer includes atomizer, cladding material conveying mechanism with the atomizer intercommunication, set up on mixing container's upper portion and be used for driving the vibration mechanism of atomizer vibration, atomizer is located mixing container inside and sets up on vibration mechanism, and this system is through the cooperation of specific atomizer and rabbling mechanism, and the surface that has realized the nuclear layer material can be even and comprehensive cladding has cladding material, promotes the wholeness ability of ternary cathode material.

Description

Spray coating system for producing ternary cathode material

Technical Field

The utility model belongs to the field of battery material production equipment, particularly relates to a ternary cathode material, such as a high-nickel ternary cathode material and the like, and particularly relates to a spray coating system for producing the ternary cathode material.

Background

With the development of new energy industry, the production and sales volume of new energy automobiles realizes multiple breakthroughs in recent years, the demand degree of lithium ion batteries on the new energy automobiles is increasingly enhanced, and the lithium ion batteries are required to have greater breakthroughs in the aspect of the exertion of the electrochemical performance of the lithium ion batteries. At present, the lithium ion battery made of the ternary cathode material has the advantage of high energy density, conforms to the industrial development requirement, and gradually becomes the mainstream technical route of the lithium ion battery.

For the ternary cathode material, although the improvement of the nickel content is a good choice for improving the capacity of the material, the adverse effect caused by the improvement is not negligible, such as the aggravation of Li/Ni mixed discharge and the increase of surface side reaction, particularly, the moisture absorption of the cathode material caused by residual lithium among particles causes the material to be in a jelly shape, and the performance of the cathode material is seriously influenced; meanwhile, the increase of the alkaline residue also causes safety problems and the like, and the development of the high-nickel ternary cathode material on the commercialization road is seriously hindered due to the problems.

In order to solve these problems and realize commercialization of the high-nickel ternary positive electrode material, surface coating (forming a ternary positive electrode material having a substantially core-shell structure, the core layer being a high-nickel ternary material, and the shell layer being a specific coating material) or ion doping is mostly adopted. Common surface coatings tend to result in some portion of the material surface being coated with a thicker layer and other portions being coated with a thinner or uncoated layer due to the difficulty in controlling the uniformity of the coating.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a novel spray coating system for producing a ternary cathode material, and the system realizes that the outer surface of a nuclear layer material can be uniformly and comprehensively coated with a coating material through the matching of a specific atomizing device and a stirring mechanism, so that the overall performance of the ternary cathode material is improved.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a spray coating system for producing a ternary cathode material comprises a mixing container, a spraying device arranged at the upper part of the mixing container, and a stirring device arranged at the lower part of the mixing container and used for stirring and mixing materials in the mixing container; wherein, atomizer include atomizer, with cladding material conveying mechanism, the setting of atomizer intercommunication are in mixing container's upper portion just is used for the drive the vibration mechanism of atomizer vibration, atomizer is located mixing container is inside and setting up vibration mechanism is last.

According to some preferred aspects of the utility model, the system further comprises a hose disposed on the vibration mechanism, and the coating material delivery mechanism is in communication with the atomizer head through the hose.

According to some preferred aspects of the present invention, the vibration mechanism includes an ultrasonic generator, an ultrasonic transducer connected to the ultrasonic generator, a horn connected to the ultrasonic transducer, and an ultrasonic vibrator connected to the horn, the ultrasonic vibrator extending into the mixing vessel, and the atomizer head is disposed on a portion of the ultrasonic vibrator extending into the mixing vessel.

According to some specific aspects of the utility model, the coating material conveying mechanism comprises a storage tank for storing the coating material, a conduit with two ends respectively communicated with the storage tank and the atomizing spray head, and a peristaltic pump arranged on the conduit.

According to some preferred aspects of the present invention, the stirring device comprises a stirring paddle arranged in the mixing container, a driving shaft in transmission connection with the stirring paddle, and a driving component for driving the driving shaft to move, wherein the stirring paddle comprises a first stirring part and a second stirring part which are arranged in sequence along the up-down direction.

Further, the first stirring part includes a first base provided on the driving shaft and an even number of first stirring blades symmetrically provided on the first base, and the second stirring part includes a second base provided on the driving shaft and an even number of second stirring blades symmetrically provided on the second base.

Further, the distance between the end of the second stirring blade far away from the driving shaft and the driving shaft is larger than the distance between the end of the first stirring blade far away from the driving shaft and the driving shaft.

According to some preferred aspects of the present invention, orthographic projections of the first stirring blade and the second stirring blade on the same horizontal plane do not coincide.

According to some preferred and specific aspects of the present invention, the first base and the second base are respectively circular in cross section, and the area of the cross section of the first base is smaller than the area of the cross section of the second base.

According to some preferred aspects of the utility model, the atomizer head is located directly above the paddle.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model innovatively adds the atomizing nozzle capable of vibrating on the mixing container, so that the coating material is dispersed to the periphery in a fog shape through the atomizing nozzle and is coated on the outer surface of the nuclear layer material, meanwhile, the atomizing nozzle can vibrate, so that the coating material can be more uniformly dispersed in the mixing container, the coating uniformity and integrity are improved, and in addition, the effect of a stirring device is combined, so that the coating material can be uniformly and comprehensively coated on the outer surface of the nuclear layer material, the integral performance of the ternary anode material is improved, the secondary coating is avoided, the production and manufacturing cost is reduced, the automation degree can be improved, and the utility model has good application prospect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a spray coating system for producing a ternary cathode material according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

in the figure, 1, a mixing vessel; 21. An atomizing spray head; 221. A conduit; 222. a peristaltic pump; 231. An ultrasonic generator; 232. an ultrasonic vibration rod; 31. A stirring paddle; 311. a first base; 312. a first stirring blade; 313. a second base; 314. a second stirring blade; 32. a drive shaft; 33. a drive member; 4. a viewing port; 5. a discharging mechanism; 6. and a sealing mechanism.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1-2, this example provides a spray coating system for producing a ternary cathode material, which includes a mixing container 1, a spray device disposed at an upper portion of the mixing container 1, and a stirring device disposed at a lower portion of the mixing container 1 and used for stirring the materials inside the mixing container 1.

Wherein, atomizer includes atomizer 21, coating material conveying mechanism with atomizer 21 intercommunication, set up in mixing vessel 1's upper portion and be used for driving the vibration mechanism of atomizer 21 vibration, atomizer 21 is located mixing vessel 1 inside and sets up on the vibration mechanism.

In this example, the coating material feeding mechanism includes a tank for storing the coating material, a conduit 221 having both ends respectively communicating with the tank and the atomizer 21, and a peristaltic pump 222 provided on the conduit 221. The coating material can be selected from low nickel materials, nano cobalt and the like known in the art, and then the coating material is configured into mixed liquid to be stored in the storage tank, the storage tank can be provided with stirring equipment for keeping the mixed liquid to be well dispersed, the fluid mixed liquid is conveniently conveyed by the peristaltic pump 222, and the peristaltic pump 222 adopts a flow sensing control mode to effectively control the adding amount of the coating material. The atomizer 21 may be a commercially available atomizer, and the mixed liquid of this embodiment may be sprayed in a mist form or a mist form.

In this example, the vibration mechanism includes an ultrasonic generator 231, an ultrasonic transducer connected to the ultrasonic generator 231, a horn connected to the ultrasonic transducer, and an ultrasonic vibrator 232 connected to the horn, the ultrasonic vibrator 232 extending into the mixing container 1, and the atomizer head 21 is provided on a portion of the ultrasonic vibrator 232 extending into the mixing container 1. The vibrating mechanism of this example not only can drive atomizer 21 and vibrate with certain frequency, and then be favorable to dispersing cladding material in each direction in mixing container 1, promotes the cladding effect on the nuclear layer material, can also produce the ultrasonic wave simultaneously, further vibrates the material in mixing container 1 to promote cladding homogeneity and validity. In addition, the amplitude transformer in this example is also provided with a cooling mechanism, and because the amplitude transformer is easy to accumulate heat after long-term operation, in order to avoid damage, the cooling mechanism provided in this example can effectively cool the amplitude transformer, for example, heat exchange is performed by adopting a water cooling mode.

Further, in this example, the system further includes a hose disposed on the vibration mechanism, the coating material conveying mechanism is communicated with the atomizing nozzle 21 through the hose, and the hose is disposed to effectively cooperate with the vibration of the vibration mechanism, so as to avoid damage and non-continuity of the equipment caused by rigid connection.

In this example, the stirring device includes a stirring paddle 31 disposed in the mixing container 1, a driving shaft 32 in transmission connection with the stirring paddle 31, and a driving member 33 (which may be a motor) for driving the driving shaft 32 to move, and the stirring paddle 31 includes a first stirring portion and a second stirring portion sequentially disposed in the vertical direction. Further, the first stirring section includes a first base 311 provided on the driving shaft 32 and an even number of first stirring blades 312 symmetrically provided on the first base 311, and the second stirring section includes a second base 313 provided on the driving shaft 32 and an even number of second stirring blades 314 symmetrically provided on the second base 313. In this example, the distance between the end of the second stirring blade 314 away from the driving shaft 32 and the driving shaft 32 is greater than the distance between the end of the first stirring blade 412 away from the driving shaft 32 and the driving shaft 32, the orthographic projections of the first stirring blade 412 and the second stirring blade 415 on the same horizontal plane are not overlapped, the cross sections of the first base 311 and the second base 313 are circular, and the area of the cross section of the first base 311 is smaller than that of the cross section of the second base 313. Above-mentioned mode of setting up can be so that the material in mixing container 1 obtains not equidirectional and the size also not identical effort, forms the stirring mixed mode of similar vortex effect moreover, promotes nuclear layer material and clad material's mixing homogeneity, and the completeness of cladding also can effectively improve.

Further, the atomizing nozzle 21 is located right above the stirring paddle 31, and both are located at the central portion of the mixing container 1 along the up-down direction, so that the coating material can be conveniently diffused all around and can be stirred more sufficiently.

In this example, this system includes viewing aperture 4 that sets up on mixing container 1 outer wall, and viewing aperture 4 can adopt transparent material to seal, is convenient for observe the inside material condition of mixing container 1, and then is favorable to in time holding the cladding condition, can also set up the equipment similar to the magnifying glass in viewing aperture 4 position simultaneously, is convenient for observe the inside condition more clearly under the not good condition of operating mode environment.

In this example, the system includes a discharging mechanism 5 disposed at the bottom of one side of the mixing container 1, and the discharging door can be driven by a motor to open and close, so as to realize automatic discharging and improve the degree of automation.

In this example, the system includes a lid body provided at an upper portion of the mixing container 1 to cover the mixing container 1, and a sealing mechanism 6 provided at one side of the mixing container 1, the sealing mechanism 6 being configured to seal the lid body and the mixing container 1 to prevent the atomized coating material or other nuclear layer material from being splashed out during high-speed mixing. Further, the sealing mechanism may be mainly composed of three parts, one part is connected with the cover body, the other part is connected with the outer wall of the mixing container, and the other part (for example, a driving device such as a cylinder) is used for realizing the closing or the separation of the two parts, thereby indirectly realizing the effective sealing of the cover body and the mixing container.

To sum up, the utility model innovatively adds the atomizer capable of vibrating on the mixing container, so that the coating material is dispersed around in a fog shape through the atomizer and coated on the outer surface of the nuclear layer material, and meanwhile, because the atomizer can vibrate, the coating material can be more uniformly dispersed in the mixing container, so that the coating uniformity and integrity are improved, and in addition, the effect of the stirring device is combined, so that the coating material can be uniformly and comprehensively coated on the outer surface of the nuclear layer material, the integral performance of the ternary anode material is improved, the secondary coating is avoided, the production and manufacturing cost is reduced, the automation degree can be improved, and the utility model has good application prospect.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the utility model, and not to limit the scope of the utility model, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims

1. A spray coating system for producing a ternary cathode material is characterized by comprising a mixing container, a spraying device arranged at the upper part of the mixing container, and a stirring device arranged at the lower part of the mixing container and used for stirring and mixing materials in the mixing container; wherein, atomizer include atomizer, with cladding material conveying mechanism, the setting of atomizer intercommunication are in mixing container's upper portion just is used for the drive the vibration mechanism of atomizer vibration, atomizer is located mixing container is inside and setting up vibration mechanism is last.

2. The spray coating system for producing a ternary positive electrode material according to claim 1, further comprising a hose disposed on the vibration mechanism, wherein the coating material delivery mechanism is in communication with the atomizer through the hose.

3. The spray coating system for producing a ternary positive electrode material of claim 1, wherein the vibration mechanism comprises an ultrasonic generator, an ultrasonic transducer connected to the ultrasonic generator, a horn connected to the ultrasonic transducer, and an ultrasonic vibrator rod connected to the horn, the ultrasonic vibrator rod extending into the mixing vessel, and the atomizing nozzle is disposed on a portion of the ultrasonic vibrator rod extending into the mixing vessel.

4. The spray coating system for producing a ternary cathode material according to claim 1, wherein the coating material conveying mechanism comprises a storage tank for storing the coating material, a conduit with two ends respectively communicated with the storage tank and the atomizing nozzle, and a peristaltic pump arranged on the conduit.

5. The spray coating system for producing the ternary cathode material according to claim 1, wherein the stirring device comprises a stirring paddle arranged in the mixing container, a driving shaft in transmission connection with the stirring paddle, and a driving component for driving the driving shaft to move, and the stirring paddle comprises a first stirring part and a second stirring part which are sequentially arranged in the vertical direction.

6. The spray coating system for producing a ternary cathode material according to claim 5, wherein the first stirring section includes a first base provided on the driving shaft and an even number of first stirring blades symmetrically provided on the first base, and the second stirring section includes a second base provided on the driving shaft and an even number of second stirring blades symmetrically provided on the second base.

7. The spray coating system for producing a ternary positive electrode material according to claim 6, wherein a distance between an end of the second stirring vane remote from the driving shaft and the driving shaft is greater than a distance between an end of the first stirring vane remote from the driving shaft and the driving shaft.

8. The spray coating system for producing a ternary cathode material according to claim 6, wherein orthographic projections of the first stirring blade and the second stirring blade on the same horizontal plane are not coincident.

9. The spray coating system for producing a ternary cathode material according to claim 6, wherein the cross-sections of the first base and the second base are circular, respectively, and the area of the cross-section of the first base is smaller than that of the cross-section of the second base.

10. The spray coating system for producing a ternary positive electrode material according to claim 5, wherein the atomizer is located directly above the paddle.