Internal series graphitization box furnace for lithium ion negative electrode material

Abstract

The present application relates to the technical field of internal series graphitization furnace, in particular to a lithium ion negative electrode material internal series graphitization box furnace. It comprises a box furnace, a material control mechanism is arranged in the box furnace, the material control mechanism comprises a mixing plate, a material direction control assembly is arranged on the mixing plate, when the mixing plate rotates, the material direction control assembly changes its structure state following the rotation of the mixing plate, when the material direction control assembly rotates following the mixing plate and the material direction control assembly is below the mixing plate, the material direction control assembly slides along the mixing plate, the direction control assembly compresses the calcined material in the box furnace, and the storage space in the box furnace is expanded. The present application controls the driving plate and the pushing plate through the mixing process of the mixing plate, makes the driving plate slide on the mixing plate to control the pushing plate to contact the mixing plate, removes the attached material on the mixing plate through the contact with the mixing plate, and realizes the uniform heating of a large amount of material.

Description

Technical Field

[0001] This invention relates to the field of internal graphitization furnace technology, and more specifically, to an internal graphitization box furnace for lithium-ion anode materials. Background Technology

[0002] The internal graphitization furnace is mainly used for the sintering and graphitization of carbon materials, graphitization of PI films, graphitization of thermal conductive materials, sintering of carbon fiber ropes, graphitization of carbon fiber filaments, purification of graphite powder, and high-temperature treatment of other materials that can be graphitized in a carbon environment. It operates at temperatures up to 3000℃, boasts high production efficiency, energy savings, and is equipped with an online temperature measurement and control system that can monitor the furnace temperature in real time and automatically adjust it. However, because the graphitization furnace needs to cool down after each use before it can be reused, the cooling process typically relies on natural cooling, resulting in a long waiting time and reduced production efficiency.

[0003] To address this, Chinese Patent Publication No. CN217844764U proposes a graphitization furnace capable of rapid cooling, comprising an outer furnace body, an inner furnace fixedly installed inside the outer furnace body, a support base fixedly installed at the bottom of the outer furnace body, a base frame fixedly installed at the bottom of the support base, a water tank fixedly installed inside the base frame, a water pump fixedly installed at the top of the base frame, and a cooling component connected to the water pump on the outer furnace body. This rapid-cooling graphitization furnace divides the water output from the pump into several portions using a diversion pipe and inputs them into various annular pipes. Each portion of water is then evenly sprayed from the surface of the outer furnace body into the internal space of the outer furnace body through cooling pipes and nozzles, thereby rapidly reducing the temperature of the inner furnace. At the same time, the fan in the air inlet hood draws in outside air and inputs it into the outer furnace body, then drives the water mist and heat out through the exhaust pipe, thereby further accelerating the air circulation and increasing the cooling speed, thus shortening the waiting time and improving work efficiency. In this technical solution, although the furnace body can be rapidly cooled and the waiting time can be shortened, the heat treatment operation of the material during the furnace body operation has not been improved. Because the furnace body is a single heating structure, the material will accumulate in the furnace body during the heat treatment process, thus affecting the heat treatment efficiency of the furnace body.

[0004] Secondly, if the material is dispersed directly by rotating the blades, the material will also adhere to the blades, which will not achieve uniform heat treatment of the material. At the same time, if the material occupies too much space in the furnace, it will also affect the subsequent replenishment of material. Summary of the Invention

[0005] The purpose of this invention is to provide an internally connected graphitization box furnace for lithium-ion anode materials to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides an internally serial graphitization box furnace for lithium-ion anode materials, comprising a box furnace, wherein a material control mechanism is provided inside the box furnace, the material control mechanism including a mixing plate for dispersing and agitating the material, and a material discharge direction control component provided on the mixing plate, the material discharge direction control component cooperating with the mixing plate to control the material in the box furnace to disperse multiple times, wherein when the mixing plate rotates, the material discharge direction control component follows the rotation of the mixing plate and changes its own structural state, wherein:

[0007] When the material discharge control component rotates with the mixing plate and is above the mixing plate, the material discharge control component slides along the mixing plate, removes the material attached to the mixing plate, and causes a large amount of material to converge.

[0008] When the material discharge control component rotates with the mixing plate and is located below the mixing plate, the material discharge control component slides along the mixing plate, discharging the material being calcined in the compression box furnace into the control component, thereby expanding the storage space inside the box furnace.

[0009] As a further improvement to this technical solution, the furnace includes a furnace body, the material discharge control component is disposed inside the furnace body, a feeding hopper for feeding materials into the furnace body is connected to the side of the furnace body, and a sealing cover is installed at one end of the furnace body.

[0010] As a further improvement to this technical solution, a support arm is installed at the bottom of the furnace body, and a discharge port is provided on the furnace body, with a sealing plate installed on the discharge port, wherein:

[0011] The furnace body is symmetrically equipped with guide plates near the discharge port, and the guide plates are connected to the furnace body through a connecting part.

[0012] As a further improvement to this technical solution, the mixing plate is rotatably disposed at one end of the inner wall of the furnace body. The mixing plate is composed of multiple push plates and is driven by a drive motor. The material discharge control component includes a drive plate disposed on the mixing plate. Push plates are installed on both sides of the drive plate. The push plates are used to change their own positions according to the movement of the drive plate on the mixing plate.

[0013] As a further improvement to this technical solution, a fixing part is movably connected to one end of the drive plate. The fixing part is installed on the dial plate of the mixing plate. A limiting arm is installed on the dial plate of the mixing plate. The limiting arm is used to support the drive plate and guide the drive plate to slide on the dial plate.

[0014] As a further improvement to this technical solution, when the drive plate is below the pusher plate on the mixing plate, the drive plate slides down along the mixing plate and contacts the inner wall of the furnace body, so that the pusher plate scrapes off the material attached to the inner wall of the furnace body.

[0015] As a further improvement to this technical solution, a guide block is provided between two adjacent push plates in the mixing plate. The guide block is used to guide the push plate to move towards the edge of the push plate, and when the material contacts the guide block, the guide block guides the material to be discharged outward.

[0016] As a further improvement to this technical solution, a sliding groove is provided on the drive plate, and one end of the limiting arm extends outward through the sliding groove. The limiting arm slides within the sliding groove to limit the movement direction of the drive plate.

[0017] As a further improvement to this technical solution, when the drive plate and push plate are in the position of the discharge port during movement, the drive plate and push plate will squeeze the material stuck in the discharge port, so that the material is discharged through the discharge port.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the internal series graphitization box furnace of the lithium-ion anode material, the driving plate and the pusher plate are controlled during the mixing process of the mixing plate, so that the driving plate slides on the mixing plate and controls the pusher plate to contact the mixing plate. By contacting the mixing plate, the material attached to the mixing plate is removed, so as to achieve uniform heating of a large amount of material.

[0020] 2. In the internal series graphitization box furnace for this lithium-ion anode material, the pusher plate is controlled downward by the drive plate, keeping it in an open state. This opening of the pusher plate compresses the material, expanding the furnace's volume space for continuous material input, facilitating subsequent continuous material injection for heat treatment.

[0021] 3. In the internal series graphitization box furnace of the lithium-ion anode material, the pusher plate is controlled by the drive plate to slide down synchronously. When the drive plate and the pusher plate contact the discharge port, the material blocking the discharge port can be cleared, so that the discharge port can discharge smoothly, realize the quick discharge of material, and improve the working efficiency of the whole device. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention;

[0023] Figure 2 This is one of the overall structural schematic diagrams of the present invention;

[0024] Figure 3 This is the second schematic diagram of the overall structure of the present invention;

[0025] Figure 4 This is a partial structural diagram of the guide plate of the present invention;

[0026] Figure 5 This is a schematic diagram of the material control mechanism of the present invention;

[0027] Figure 6 This is an exploded view of the material control mechanism structure of the present invention;

[0028] Figure 7 In this invention Figure 6 A schematic diagram of the structure at point A.

[0029] The meanings of the labels in the diagram are as follows:

[0030] 1. Box furnace;

[0031] 11. Furnace body; 12. Feed hopper; 13. Sealing cover; 14. Support arm; 15. Guide plate; 16. Connecting part; 17. Discharge port;

[0032] 2. Material control mechanism;

[0033] 21. Mixing plate; 22. Drive plate; 221. Transfer trough; 23. Push plate; 24. Fixing part; 25. Limiting arm; 26. Feeding block; 27. Drive motor. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Please see Figures 1-7 As shown, this embodiment provides an internal series graphitization box furnace for lithium-ion anode materials, including a box furnace 1. A material control mechanism 2 is provided inside the box furnace 1. The material control mechanism 2 includes a mixing plate 21 for dispersing and agitating the material. In this embodiment, by placing the material into the box furnace 1 and rotating the mixing plate 21, the mixing plate 21 can quickly disperse the incoming material, thereby accelerating the heat transfer between the materials and achieving rapid heat treatment of the material.

[0038] A material discharge direction control component is provided on the mixing plate 21. This component works in conjunction with the mixing plate 21 to control the multiple dispersion of materials within the furnace 1. As the mixing plate 21 rotates, the material discharge direction control component follows the rotation of the mixing plate 21, changing its own structural state.

[0039] When the material discharge control component rotates with the mixing plate 21 and is above the mixing plate 21, the material discharge control component slides along the mixing plate 21. The material discharge control component removes the material attached to the mixing plate 21 and allows a large amount of material to converge. The rotation of the mixing plate 21 controls the movement of the material discharge control component. When the material discharge control component is above the mixing plate 21, the material discharge control component slides down along the mixing plate 21 to remove the material attached to the mixing plate 21 and allow the material to come into contact with other materials, thereby accelerating the calcination rate between the materials.

[0040] When the material discharge control component rotates with the mixing plate 21 and is located below the mixing plate 21, the material discharge control component slides along the mixing plate 21, discharging the material into the compression chamber 1 for heat treatment, thereby expanding the storage space inside the chamber 1. When the material discharge control component slides down along the mixing plate 21, it compresses part of the material inside the chamber 1, expanding the remaining space volume inside the chamber 1 by compressing the material, which facilitates the continuous replenishment of material into the chamber 1 for heat treatment.

[0041] To provide a detailed explanation of the above technical solutions:

[0042] The furnace 1 includes a furnace body 11, and a material discharge control component is installed inside the furnace body 11. A feeding hopper 12 for feeding materials into the furnace body 11 is connected to the side of the furnace body 11. A sealing cover 13 is installed at one end of the furnace body 11. Materials are placed into the furnace body 11 through the feeding hopper 12. This allows for timely replenishment of materials after heat treatment in the furnace body 11, improving the working efficiency of the furnace body 11. When cleaning or installing the material discharge control component, the sealing cover 13 can be opened to facilitate the installation of the material discharge control component into the furnace body 11 or to clean the furnace body 11.

[0043] A support arm 14 is installed at the bottom of the furnace body 11, and a discharge port 17 is provided on the furnace body 11. A sealing plate is provided on the discharge port 17, wherein:

[0044] A guide plate 15 is symmetrically installed on the furnace body 11 near the discharge port 17. The guide plate 15 is connected to the furnace body 11 through the connecting part 16 and can be removed by the sealing plate. When the heat-treated material needs to be discharged, the material is squeezed and scraped by the material discharge control component and discharged along the discharge port 17. This enables convenient discharge of the material in the furnace body 11. The guide plate 15 rotates on the connecting part 16 to guide the discharged material and change the direction of the material discharged from the discharge port 17. By changing the discharge direction, the material can reach the required position for subsequent processing steps.

[0045] The mixing plate 21 is rotatably mounted on one end of the inner wall of the furnace body 11. The mixing plate 21 is composed of multiple push plates and is driven by a drive motor 27. The material discharge control component includes a drive plate 22 mounted on the mixing plate 21. Push plates 23 are installed on both sides of the drive plate 22. The push plates 23 are used to change their positions according to the movement of the drive plate 22 on the mixing plate 21. Through the connection between the drive plate 22 and the mixing plate 21, when the mixing plate 21 drives the drive plate 22 to rotate and the drive plate 22 is above the mixing plate 21, the drive plate 22 slides downward along the side wall of the mixing plate 21. At this time, the push plates 23 slide downward synchronously, and the push plates 23... 3. When sliding, the material plate 23 contacts the two push plates of the mixing plate 21, and slides outward on the push plates, thereby quickly removing the material attached to the push plates. After removal, the material falls into the furnace body 11 through the push plates, and the material mixes with other materials, so that a large amount of material is uniformly heat-treated, improving the heat treatment and heat transfer efficiency of the material in the furnace body 11. When the drive plate 22 and the push plate 23 are below the furnace 1, the push plate 23 will rotate along the connection with the fixed part 24. The push plate 23 rotates outward to expand, realizing the compression treatment of the material by the push plate 23, which facilitates the continuous replenishment of material into the furnace body 11.

[0046] One end of the drive plate 22 is movably connected to a fixing part 24, which is mounted on the dial plate of the mixing plate 21. A limiting arm 25 is mounted on the dial plate of the mixing plate 21. The limiting arm 25 is used to support the drive plate 22 and guide the drive plate 22 to slide on the dial plate. The drive plate 22 and the fixing part 24 are movably connected by a hinge or a rotational connection. The push plate 23 is above the dial plate of the mixing plate 21. Due to the gravity of the drive plate 22 and the push plate 23, the drive plate 22 slides on the dial plate of the mixing plate 21. At this time, the push plate 23 slides downward and contacts the limiting arm 25 during the sliding process. The push plate 23 is affected by the resistance of the limiting arm 25, causing the push plate 23 to slide outward along the fixing part 24. At this time, the push plate 23 will contact the dial plate of the mixing plate 21, realizing the rapid removal of the material attached to the dial plate.

[0047] Another possible implementation method, different from the above implementation scheme:

[0048] When the drive plate 22 is below the upper baffle of the mixing plate 21, the drive plate 22 slides down along the mixing plate 21 and contacts the inner wall of the furnace body 11, causing the pusher plate 23 to scrape off the material attached to the inner wall of the furnace body 11. By sliding the drive plate 22 down along the baffle of the mixing plate 21, the drive plate 22 controls the pusher plate 23 to move downward. At this time, the pusher plate 23 will be in an open state, and the material in the furnace body 11 will be compressed by the pusher plate 23. Since both the drive plate 22 and the pusher plate 23 are in contact with the inner wall of the furnace body 11, the scraping treatment of the inner wall of the furnace body 11 is achieved by the contact between the drive plate 22 and the pusher plate 23. The reason for this treatment is that during the heat treatment and dispersion process of the mixing plate 21, the material will gather on the inner bottom side of the furnace body 11 due to gravity. By scraping off the inner wall of the furnace body 11, the material attached to the inner wall can be uniformly heat-treated with other materials, realizing a high-efficiency material processing process.

[0049] In this mixing plate 21, a guide block 26 is provided between two adjacent deflectors. The guide block 26 guides the pusher plate 23 to move towards the edge of the deflector. When the material contacts the guide block 26, the guide block 26 guides the material to be discharged outward. By setting the guide block 26, when the pusher plate 23 is above the mixing plate 21, the guide block 26 will guide the pusher plate 23 to slide down along the guide block 26 onto the deflector of the mixing plate 21. This avoids the problem of the pusher plate 23 being unable to slide on the deflector, and facilitates the rapid removal of material from the deflector.

[0050] Secondly, a sliding groove 221 is provided on the drive plate 22. One end of the limiting arm 25 extends outward through the sliding groove 221. The limiting arm 25 slides in the sliding groove 221 to limit the movement direction of the drive plate 22. After the drive plate 22 is connected to the dial plate of the mixing plate 21, the connection between the limiting arm 25 and the sliding groove 221 ensures that the drive plate 22 is limited by the limiting arm 25 when sliding on the dial plate of the mixing plate 21. This ensures that the drive plate 22 moves on the dial plate and does not detach from the dial plate, thus ensuring that the use of the entire device is not affected.

[0051] Another possible implementation method, different from the above implementation scheme:

[0052] When the drive plate 22 and push plate 23 are in the position of the discharge port 17 during movement, the drive plate 22 and push plate 23 will squeeze the material stuck in the discharge port 17, so that the material is discharged through the discharge port 17. As the drive plate 22 slides down along the push plate, the drive plate 22 controls the push plate 23 to slide down synchronously. In this way, when the drive plate 22 and push plate 23 come into contact with the discharge port 17, they can clear the material blocking the discharge port 17 and make the discharge of material from the discharge port 17 smooth. Among them, the drive plate 22 and push plate 23 will extend into the discharge port 17, but will not penetrate the discharge port 17. This avoids the problem of the drive plate 22 and push plate 23 extending too far and failing to reset.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A box furnace for internal series graphitization of lithium-ion anode materials, comprising a box furnace (1), characterized in that: The furnace (1) is equipped with a material control mechanism (2), which includes a mixing plate (21) for dispersing and agitating the material. A material discharge control component is mounted on the mixing plate (21) to cooperate with the mixing plate (21) and control the material within the furnace (1) to disperse multiple times. When the mixing plate (21) rotates, the material discharge control component follows the rotation of the mixing plate (21) and changes its own structural state. When the material discharge control component rotates with the mixing plate (21) and is above the mixing plate (21), the material discharge control component slides along the mixing plate (21), removes the material attached to the mixing plate (21), and causes a large amount of material to converge. When the material discharge control component rotates with the mixing plate (21) and is below the mixing plate (21), the material discharge control component slides along the mixing plate (21) and discharges the material calcined in the compression box furnace (1) to the control component, thereby expanding the storage space in the box furnace (1). The mixing plate (21) is rotatably disposed at one end of the inner wall of the furnace body (11). The mixing plate (21) is composed of multiple push plates. The mixing plate (21) is driven by a drive motor (27). The material discharge control component includes a drive plate (22) disposed on the mixing plate (21). Push plates (23) are installed on both sides of the drive plate (22). The push plates (23) are used to change their own position according to the movement of the drive plate (22) on the mixing plate (21). One end of the drive plate (22) is movably connected to a fixing part (24), the fixing part (24) is installed on the dial plate of the mixing plate (21), and a limiting arm (25) is installed on the dial plate of the mixing plate (21). The limiting arm (25) is used to support the drive plate (22) and guide the drive plate (22) to slide on the dial plate. When the drive plate (22) is below the push plate on the mixing plate (21), the drive plate (22) slides down along the mixing plate (21) and contacts the inner wall of the furnace body (11), so that the push plate (23) scrapes off the material attached to the inner wall of the furnace body (11). A guide block (26) is provided between two adjacent push plates in the mixing plate (21). The guide block (26) is used to guide the push plate (23) to move towards the edge of the push plate, and when the material contacts the guide block (26), the guide block (26) guides the material to be discharged outward.

2. The internally connected graphitization box furnace for lithium-ion anode materials according to claim 1, characterized in that: The furnace (1) includes a furnace body (11), the material discharge control component is disposed inside the furnace body (11), the side of the furnace body (11) is connected to a feeding hopper (12) for feeding materials into the furnace body (11), and a sealing cover (13) is installed at one end of the furnace body (11).

3. The internally connected graphitization box furnace for lithium-ion anode materials according to claim 2, characterized in that: A support arm (14) is installed at the bottom of the furnace body (11), and a discharge port (17) is provided on the furnace body (11). A sealing plate is provided on the discharge port (17), wherein: A guide plate (15) is symmetrically installed on the furnace body (11) near the discharge port (17), and the guide plate (15) is connected to the furnace body (11) through a connecting part (16).

4. The internally connected graphitization box furnace for lithium-ion anode materials according to claim 1, characterized in that: The drive plate (22) has a sliding groove (221), one end of the limiting arm (25) passes through the sliding groove (221) outward, and the limiting arm (25) slides in the sliding groove (221) to limit the movement direction of the drive plate (22).

5. The internally connected graphitization box furnace for lithium-ion anode materials according to claim 1, characterized in that: When the drive plate (22) and push plate (23) are in the position of the discharge port (17) during movement, the drive plate (22) and push plate (23) will squeeze the material stuck in the discharge port (17) so that the material is discharged through the discharge port (17).

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