CN215428894U - Mixed granulation equipment applied to lithium ion battery anode material - Google Patents

Abstract

The utility model discloses a mixing granulation device applied to a lithium ion battery anode material, which comprises a mixing granulation chamber, a stirring device, a cooling jacket and a pneumatic discharge device, wherein the mixing granulation chamber is provided with a granulation cavity; the top of the mixing and granulating chamber is provided with a binder adding device, a material adding port and a dust filter; the stirring device is arranged at the bottom of the granulation cavity and comprises a plurality of blades and a driving device for driving the blades to rotate; the cooling jacket is sleeved outside the mixing granulation chamber, and a cooling water inlet and a cooling water outlet are formed in one side of the cooling jacket; and the pneumatic discharging device is arranged on the other side of the cooling jacket and is communicated with the granulation cavity. The utility model can greatly improve the bowl loading amount, shorten the production period, reduce the production cost, ensure the consistency of products and have excellent comprehensive performance.

Description

Mixed granulation equipment applied to lithium ion battery anode material

Technical Field

The utility model relates to powder treatment equipment, in particular to mixing granulation equipment applied to a lithium ion battery anode material.

Background

With the rapid development of new energy industry, lithium ion batteries are widely applied to the fields of automobile power batteries, electrochemical energy storage, 3C product batteries and the like as a novel and green energy supply mode. The lithium ion battery has the advantages of high energy density, long cycle life, green and recyclable property, but the lithium ion battery is not popularized in a large scale in the market at present due to cost, and the high production cost of the anode material serving as the main raw material of the lithium ion battery is a key factor for limiting the cost reduction of the lithium ion battery. The most critical and most costly production process in the preparation process of the cathode material is sintering, and as sintering is mainly a solid-phase reaction, the reaction period is long, the high-temperature energy consumption is high, the production capacity is low, and the cost is high; in addition, because the particle diameters of the raw material precursor for preparing the anode material and the lithium source particles are small, waste gas generated by reaction is difficult to discharge in time when the pot loading amount is high, and the reaction of the raw material at the bottom is incomplete, the sintered product is layered from top to bottom, the consistency is poor, and the electrochemical performance of the lithium ion battery is further influenced, so that the performances such as capacity, circulation and the like of the lithium ion battery are deteriorated.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the mixing and granulating equipment applied to the lithium ion battery anode material, the precursor lithium source mixed raw material prepared by the equipment can be sintered by a higher pot loading amount, the sintering period is short, and the product consistency is high. Effectively improves the production efficiency and reduces the production cost.

The mixing and granulating equipment applied to the lithium ion battery anode material comprises a mixing and granulating chamber, a stirring device, a cooling jacket and a pneumatic discharging device, wherein the mixing and granulating chamber is provided with a granulating cavity; the top of the mixing granulation chamber is provided with a binder adding device, a material adding port and a dust filter; the stirring device is arranged at the bottom of the granulation cavity and comprises a plurality of blades and a driving device for driving the blades to rotate; the cooling jacket is sleeved outside the mixing granulation chamber, and a cooling water inlet and a cooling water outlet are formed in one side of the cooling jacket; and the pneumatic discharging device is arranged on the other side of the cooling jacket and is communicated with the granulating cavity.

The mixing granulation equipment applied to the lithium ion battery anode material provided by the embodiment of the utility model at least has the following technical effects: according to the equipment, the lithium ion battery anode material precursor and a lithium source are mixed according to a certain proportion and then granulated, and the mixture is prepared into large-particle-size mixed material particles with certain size distribution and particle strength.

According to some embodiments of the present invention, the adhesive adding device is installed at an upper end surface of the mixing granulation chamber, a portion of the adhesive adding device protrudes into the granulation chamber, and the adhesive adding device sprays a half space of the granulation chamber.

According to some embodiments of the utility model, the binder addition device is located at 1/2 of the distance between one side of the mixing and pelletizing chamber and the center of the mixing and pelletizing chamber.

According to some embodiments of the present invention, the plurality of paddles are arranged in an up-down sequence, and the plurality of paddles are arranged in a staggered configuration.

According to some embodiments of the utility model, the paddle is located adjacent to the bottom surface of the granulation chamber.

According to some embodiments of the utility model, the total height of the plurality of paddles is 1/2 the height of the granulation chamber.

According to some embodiments of the utility model, the mixing granulation chamber comprises a main body provided with the granulation chamber and an upper cover that can move up and down and that covers the main body to seal the granulation chamber.

According to some embodiments of the utility model, the granulation apparatus further comprises a blowing device, wherein the blowing device is installed at the top of the mixing granulation chamber, a part of the blowing device extends into the granulation chamber, and the blowing device blows the side wall of the granulation chamber.

According to some embodiments of the utility model, the purging device purges the upper half of the side wall of the granulation chamber.

According to some embodiments of the utility model, the height of the cooling jacket is 1/2 of the height of the granulation chamber, and the cooling jacket is sleeved on the bottom of the mixing granulation chamber.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a mixing and granulating apparatus applied to a lithium ion battery cathode material according to an embodiment of the present invention;

fig. 2 is a schematic top view of the blade mounted in the pelletizing chamber.

Reference numerals: the device comprises a mixing and granulating chamber 100, a granulating cavity 110, a main body 120, an upper cover 130, a binder adding device 200, a material adding port 300, a dust filter 400, a stirring device 500, a blade 510, a driving device 520, a cooling jacket 600, a cooling water inlet 610, a cooling water outlet 620, a pneumatic discharging device 700 and a purging device 800.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, a plurality means two or more. It should be understood that the orientation or positional relationship referred to in the description of the orientation, such as up, down, front, rear, left, right, and middle, is based on the orientation or positional relationship shown in the drawings. This is done solely for the purpose of facilitating the description of the utility model and simplifying the description without indicating or implying that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the utility model.

In the description of the present invention, unless otherwise specifically limited, installation and connection terms should be construed broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in consideration of the technical details.

Referring to fig. 1, the mixing and granulating apparatus applied to the positive electrode material of the lithium ion battery according to the embodiment of the present invention includes a mixing and granulating chamber 100, a stirring device 500, a cooling jacket 600, and a pneumatic discharging device 700, the mixing and granulating chamber 100 is provided with a granulating cavity 110; the top of the mixing and granulating chamber 100 is provided with a binder adding device 200, a material adding port 300 and a dust filter 400; the stirring device 500 is installed at the bottom of the granulation chamber 110, and the stirring device 500 comprises a plurality of blades 510 and a driving device 520 for driving the blades 510 to rotate; a cooling jacket 600 sleeved outside the mixing granulation chamber 100, wherein one side of the cooling jacket 600 is provided with a cooling water inlet 610 and a cooling water outlet 620; and the pneumatic discharging device 700 is arranged on the other side of the cooling jacket 600 and is communicated with the granulating cavity 110.

For example, the driving device 520 is a vertical motor, and the vertical motor drives the blade 510 to rotate through a belt; the material adding port 300 is used for adding different raw materials, and the material adding port 300 is provided with a valve for opening and closing the material adding port 300; the dust filter 400 is used for discharging the sealing gas in the granulation chamber 110 and the water vapor generated in the mixing granulation process in time, and ensuring that the powder is not lost along with the discharge of the gas; the cooling water inlet and the cooling water outlet 620 are used for being communicated with a circulating cooling water system;

when the lithium ion battery granulation device works, the valve is opened to open the material adding port 300, the raw material precursor and the lithium source of the lithium ion battery anode material are quantitatively added into the granulation cavity 110 from the material adding port 300 according to a certain proportion, and the filling amount is ensured to be less than 50%. After the material is added, the valve is closed to close the material adding port 300, the material mixing is ready to start, at the moment, the cooling water system needs to ensure stable operation, cooling water enters the cooling jacket 600 from the cooling water inlet to take away heat generated by the operation of the mixing granulation chamber 100, and flows out from the cooling water outlet 620 to return to the cold water system. During material mixing, the vertical motor can firstly run at low frequency to drive the blades 510 to pre-mix the raw materials, and after the pre-mixing is finished, the running frequency of the motor is improved, so that the blades 510 can rotate quickly to drive the materials to move longitudinally and tangentially, and various raw materials can be quickly and uniformly mixed. After the raw materials are mixed, the raw materials are granulated, the frequency of the motor is firstly adjusted to enable the blades 510 to keep low rotating speed, the materials are driven to rotate slowly, then the prepared binder is uniformly added into the materials in the granulating cavity 110 from the binder adding device 200, and the specific adding amount can be adjusted according to different material properties. The spray range of the nozzle of the binder adding device 200 can be adjusted to a half space covering the granulation chamber 110, and the binder can be uniformly added to the mixed material as the paddle 510 drives the material to slowly rotate. After the binder is added, the motor frequency is increased to enable the blades 510 to rotate rapidly, when the blades 510 rotate, parabolic air flows from the central part to the periphery are generated to interact with the upper blades 510 and the lower blades 510, strong nest and roll air flows are formed during rapid rotation to enable the powder and the binder to rotate and revolve and to be uniformly dispersed, and granulation is achieved under the action of extrusion force and particle surface force. The particle size and physical strength of the granulated material particles are comprehensively determined by the structure of the paddle 510, the rotating speed of the paddle 510, the components, proportion and addition amount of the binder, the properties of the raw materials, the granulation time and other factors. In summary, the granulated material has a larger particle size, usually between 500 μm and 5mm, in which the mixture of the raw material particles is uniformly distributed, and has a certain physical strength, and can maintain the original shape after drying. In the granulation process, the dust filter 400 is required to be opened, and the sealing gas in the equipment and the water vapor generated in the granulation process are discharged in time to prevent the material particles from being attached to the inner wall of the mixing granulation chamber 100; meanwhile, the circulation water cooling system needs to be started, and heat generated by equipment operation is quickly taken away. After a mixing granulation process is completed, the material is discharged by the pneumatic discharging device 700, and is sintered in the roller kiln after being simply dried. Due to the characteristics of the granules after granulation, gaps among the granules caused by large particle size can enable oxygen to smoothly enter a thicker material layer to participate in reaction, and exhaust gas generated by the reaction can be discharged in time, so that the reaction conversion rate is greatly improved, and the loading amount of the sagger can be increased by about 50% to ensure that the materials in the sagger are completely reacted. Meanwhile, the contact of the raw materials in the granulated material particles is tighter, so that the reaction time of the diffusion stage of the solid-phase reaction control step is greatly reduced, and the heat transfer among the particles is more uniform and quicker, thereby further shortening the sintering period, improving the production yield and reducing the production cost.

In some embodiments of the present invention, as shown in fig. 1, the binder adding device 200 is installed at an upper end surface of the mixing granulation chamber 100, a portion of the binder adding device 200 protrudes into the granulation chamber 110, and the binder adding device 200 sprays a half space of the granulation chamber 110. Specifically, the mixing granulation chamber 100 is cylindrical, the granulation chamber 110 is also cylindrical, and a half space of the granulation chamber 110 is a left half portion of the cylindrical shape, so as to ensure that the binder is uniformly added to the mixed material.

In a further embodiment of the present invention, as shown in fig. 1, the binder addition device 200 is located at 1/2 of the distance between one side of the mixing and pelletizing chamber 100 and the center of the mixing and pelletizing chamber 100. Specifically, the binder adding device 200 is located at 1/2 of the radius of the cylindrical shape, which is configured to ensure that the binder is sprayed into one half of the space of the pelletizing chamber 110.

In some embodiments of the present invention, as shown in fig. 1 and 2, the plurality of paddles 510 are arranged in sequence, and the plurality of paddles 510 are arranged in a staggered configuration. Specifically, the number of the plurality of blades 510 may be 2, 3, 4, or more than 4, for example, the number of the blades 510 is 4, the blade 510 may be of a scraper type, the 4 blades 510 are sequentially arranged from top to bottom, and the upper blade 510 and the lower blade 510 are arranged at an angle of 60 ° in a plan view, so that the powder and the binder are uniformly dispersed, and granulation is achieved under the action of the pressing force and the surface force of the particles.

In a further embodiment of the utility model, as shown in fig. 1, the paddle 510 near the bottom surface of the granulation chamber 110 has a gap with the bottom surface of the granulation chamber 110. The lowermost paddle 510 is as close as possible to the bottom of the granulation chamber 110 in order to scrape the bottom material and repeatedly collide and mix it with the upper material.

In a further embodiment of the present invention, as shown in fig. 1, the total height of the plurality of paddles 510 is 1/2 the height of the granulation chamber 110.

In some embodiments of the present invention, as shown in fig. 1, the mixing and pelletizing chamber 100 includes a main body 120 and an upper cover 130 that can move up and down, the main body 120 is provided with a pelletizing chamber 110, and the upper cover 130 is placed over the main body 120 to seal the pelletizing chamber 110. For example, the opening and closing cylinder is installed on the body 120, the movable end of the opening and closing cylinder is connected with the upper cover 130, and the opening and closing cylinder drives the upper cover 130 to move up and down during operation; the upper cover 130 is provided with an adhesive adding device 200, a material adding port 300, and a dust filter 400. The upper cover 130 can be moved up and down to facilitate cleaning of the granulation chamber 110 and maintenance of the paddles 510.

In some embodiments of the present invention, as shown in fig. 1, a purging device 800 is further included, the purging device 800 is installed at the top of the mixing granulation chamber 100, a portion of the purging device 800 extends into the granulation chamber 110, and the purging device 800 purges the sidewall of the granulation chamber 110. In the continuous production process of the mixing and granulating equipment, the phenomena of water vapor condensation and material adhesion on the inner wall of the mixing and granulating chamber 100 can be inevitably generated. In order to improve the situation, after each work flow is finished, the blowing device 800 can be started to blow the inner wall of the mixing and granulating chamber 100 clean by using clean and dry compressed air, and because the material quantity is less, the material quantity can be remained in the mixing and granulating chamber 100 to be mixed with the raw material added in the next production without great influence, and the material quantity is discharged together after the next granulation production is finished. The material quantity is in a stable state in long-term production and is in a controllable process range. Specifically, the purge device 800 uses clean and dry compressed air as a gas source, and is installed at a central point of the upper cover 130.

In a further embodiment of the utility model, as shown in fig. 1, the purge device 800 purges the upper half of the sidewall of the granulation chamber 110. This is provided to avoid excessive consumption of compressed air, due to the condensation of water vapor, the material adhering mainly to the upper half of the side wall of the granulation chamber 110.

In some embodiments of the present invention, as shown in fig. 1, the height of cooling jacket 600 is 1/2 of the height of pelletizing cavity 110, and cooling jacket 600 is fitted over the bottom of mixing and pelletizing chamber 100. The cooling jacket 600 covers only the lower half of the mixing and granulating chamber 100 in order to prevent the upper high-temperature moisture from being condensed by cooling.

The binder adding device 200, the dust filter 400, the pneumatic discharging device 700, and the purging device 800 may be referred to as conventional devices.

In the description herein, references to the description of "some embodiments" or "what is conceivable" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a be applied to mixed granulation equipment of lithium ion battery cathode material which characterized in that includes:

the mixing granulation chamber is provided with a granulation cavity; the top of the mixing granulation chamber is provided with a binder adding device, a material adding port and a dust filter;

the stirring device is arranged at the bottom of the granulation cavity and comprises a plurality of blades and a driving device for driving the blades to rotate;

the cooling jacket is sleeved outside the mixing granulation chamber, and a cooling water inlet and a cooling water outlet are formed in one side of the cooling jacket;

and the pneumatic discharging device is arranged on the other side of the cooling jacket and is communicated with the granulating cavity.

2. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 1, characterized in that: the binder adding device is arranged on the upper end face of the mixing and granulating chamber, one part of the binder adding device extends into the granulating cavity, and the binder adding device sprays half space of the granulating cavity.

3. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 2, characterized in that: the binder addition device is located 1/2 of the distance between one side of the mixing and pelletizing chamber and the center of the mixing and pelletizing chamber.

4. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 1, characterized in that: the plurality of paddles are sequentially arranged from top to bottom, and the plurality of paddles are arranged in a staggered structure.

5. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 4, wherein the mixing and granulating equipment comprises: and a gap is formed between the paddle close to the bottom surface of the granulation cavity and the bottom surface of the granulation cavity.

6. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 4, wherein the mixing and granulating equipment comprises: the total height of the plurality of paddles is 1/2 the height of the granulation chamber.

7. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 1, characterized in that: the mixing and granulating chamber comprises a main body and an upper cover capable of moving up and down, the main body is provided with the granulating cavity, and the upper cover covers the main body to seal the granulating cavity.

8. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 1, characterized in that: the blowing device is arranged at the top of the mixing granulation chamber, one part of the blowing device extends into the granulation cavity, and the blowing device blows the side wall of the granulation cavity.

9. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 8, wherein the mixing and granulating equipment comprises: the blowing device blows the upper half part of the side wall of the granulation cavity.

10. The mixing and granulating equipment applied to the lithium ion battery cathode material according to claim 1, characterized in that: the height of the cooling jacket is 1/2 of the height of the granulating cavity, and the cooling jacket is sleeved at the bottom of the mixing and granulating chamber.

Images