Silicon-carbon negative electrode material drying device

Abstract

The utility model relates to a silicon carbon negative electrode material drying device which comprises a drying box, a drying tower arranged in the drying box and a driving mechanism used for driving materials to be transferred on the drying tower. The two drying towers are arranged in a spaced mode, a feeding hopper and a discharging pipe are arranged at the top and the bottom of each drying box respectively, the feeding hopper is located between the two drying towers, a connecting frame is arranged in the feeding hopper and extends into the drying box, and a conical material distributing plate is arranged at the end, extending into the drying box, of the connecting frame. The edge of the material distributing plate extends to the position over the two drying towers. According to the utility model, the design of double drying towers is adopted, and materials enter from the feeding hopper and uniformly fall onto the two drying towers under the action of the conical material distribution plate, so that the two drying towers can realize effective drying, the feeding quantity is further improved, and continuous, massive and efficient drying of silicon-carbon negative electrode materials is realized.

Description

Technical Field

[0001] The utility model relates to the field of drying equipment, and in particular to a silicon-carbon negative electrode material drying device. Background Art

[0002] In the industrial production of negative electrode materials for lithium-ion batteries, it is usually necessary to mix silicon powder and carbon powder (or graphite powder) evenly to form a precursor for silicon-carbon composite materials. The moisture and volatiles in the mixed materials are removed by a drying device to avoid affecting the subsequent high-temperature treatment. Among them, disc dryers, as a commonly used drying equipment, have the advantages of low energy consumption, uniform drying, good product quality, easy operation and a wide range of applications. However, existing disc dryers usually only use a set of vertically arranged heating discs for drying. The efficiency is not enough when processing large quantities of materials. It is often necessary to use multiple dryers for synchronous processing, which leads to increased costs. Utility Model Content

[0003] In view of this, the utility model provides a silicon-carbon negative electrode material drying device which can effectively improve the material drying efficiency and drying amount.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A silicon-carbon negative electrode material drying device comprises a drying box, a drying tower arranged in the drying box, and a driving mechanism for driving the material to transfer on the drying tower; the drying towers are two spaced apart, a feed hopper and a discharge pipe are respectively arranged on the top and bottom of the drying box, the feed hopper is located between the two drying towers, a connecting frame is arranged in the feed hopper, the connecting frame extends into the drying box, and a conical dividing plate is arranged at one end extending into the drying box, and the edge of the dividing plate extends to directly above the two drying towers.

[0006] The above technical solution adopts a double drying tower design. The material enters from the feed hopper and falls evenly onto the two drying towers under the action of the conical dividing plate, thereby ensuring the uniformity of the falling material, so that both drying towers can achieve effective drying, avoiding the accumulation and blockage of materials during the drying process, and further increasing the feed rate, achieving continuous, large-scale and efficient drying of silicon-carbon negative electrode materials. In addition, a feed hopper is provided at the top of the drying box and a discharge pipe is provided at the bottom, that is, a single feed hopper and discharge pipe are used to ensure that both drying towers can be effectively dried, while also allowing materials to enter and exit the drying box conveniently and quickly.

[0007] Optionally, in a possible implementation, the connecting frame includes a first connecting rod and a second connecting rod, the first connecting rod is arranged on the inner wall of the feed hopper, one end of the second connecting rod is arranged on the first connecting rod and the other end extends into the drying box, and the conical dividing plate is movably arranged on the second connecting rod.

[0008] In the above technical solution, the first connecting rod is installed on the inner side wall of the feed hopper, which ensures the overall stability of the connecting frame and avoids the impact caused by the entry of materials, which may cause the structure to loosen or deform. The second connecting rod is set so that the conical material distribution plate can be accurately positioned directly above the two drying towers. In addition, the conical material distribution plate can be movably arranged on the second connecting rod, so that the material distribution plate can be flexibly adjusted according to actual production needs.

[0009] Optionally, in a possible implementation, a limit block is provided at one end of the second connecting rod extending into the drying box, and an elastic member is sleeved on the second connecting rod, and the elastic member is located between the limit block and the conical dividing plate.

[0010] In the above technical solution, the setting of the limit block can limit the maximum displacement of the conical material distribution plate, prevent it from being separated from the second connecting rod due to excessive movement, and ensure the stability and safety of the entire device. At the same time, the setting of the elastic member allows the conical material distribution plate to obtain a certain elastic force, so that when the material falls on the conical material distribution plate, the conical material distribution plate will vibrate repeatedly due to the impact, thereby effectively preventing the material from sticking to the conical material distribution plate to a certain extent and avoiding blockage.

[0011] Optionally, in a possible implementation manner, the elastic member is a metal spring or elastic rubber.

[0012] In the above technical solution, both the metal spring and the elastic rubber have excellent elasticity and durability, and can be selected according to the specific use environment and needs. The use of elastic parts can effectively enhance the stability and safety of the drying device and provide reliable protection for the drying process of the silicon-carbon negative electrode material.

[0013] Optionally, in a possible implementation, the drying tower includes a bracket, and a plurality of first heating trays and second heating trays disposed on the bracket, and the plurality of first heating trays and second heating trays are spaced and staggered in a vertical direction.

[0014] In the above technical solution, the first heating plate and the second heating plate are spaced and staggered in the vertical direction, which realizes more uniform and efficient heating and drying of the silicon-carbon negative electrode material. The multiple heating plates are staggered to heat and dry the materials in turn, so that the materials can be fully exposed to heat during the drying process, avoiding uneven heating, accelerating the evaporation of water, and improving the drying speed.

[0015] Optionally, in a possible implementation, the diameter of the first heating disk is smaller than the diameter of the second heating disk, a through hole is provided at the center of the second heating disk, and the driving mechanism drives the material to fall from the edge of the first heating disk into the second heating disk, and then fall from the through hole of the second heating disk into another first heating disk.

[0016] In the above technical solution, the diameter of the first heating plate is smaller than the diameter of the second heating plate, which not only optimizes the layout of the heating space, but also makes the flow of the material during the heating process more reasonable and efficient. The material is continuously transferred from top to bottom between the first heating plate and the second heating plate, thereby realizing the continuous flow of the material during the heating process, ensuring that the material is evenly heated during the heating process, and avoiding differences in heating effects caused by uneven material distribution.

[0017] Optionally, in a possible implementation, the driving mechanism includes a rotating rod rotatably mounted on the drying box, a driving member for driving the rotating rod to rotate, and a plurality of first rake arms and second rake arms arranged on the outer periphery of the rotating rod, the first rake arms and the second rake arms respectively abut against the upper surfaces of the first heating disk and the second heating disk, the first rake arms and the second rake arms are respectively provided with a plurality of first rake leaves and second rake leaves, the first rake leaves and the second rake leaves are inclined and have opposite inclination directions.

[0018] In the above technical solution, the structural design of the driving mechanism is ingenious and efficient, which not only realizes the automated transportation and distribution of materials, but also ensures the uniform spreading and flow of materials on the heating plate through the cooperation of the rake arm and the rake leaf. The first rake arm and the first rake leaf gradually push the material to the outer edge of the first heating plate to fall into the second heating plate, and the second rake arm and the second rake leaf gradually push the material to the through hole of the second heating plate to fall into the first heating plate, so as to ensure that the material can be transferred in an orderly manner.

[0019] Optionally, in a possible implementation, the driving member includes a motor disposed on the top of the drying box, a first bevel gear disposed at an output end of the motor, and a second bevel gear disposed on the rotating rod, and the first bevel gear is meshingly connected with the second bevel gear.

[0020] In the above technical solution, the setting of the motor enables the driving process to be electrified and improves work efficiency. The meshing connection between the first bevel gear and the second bevel gear realizes the vertical transmission of power, so that the motor and the rotating rod can be in a mutually perpendicular state, thereby facilitating the installation of the motor on the drying box, effectively saving installation space and optimizing the spatial layout.

[0021] Optionally, in a possible implementation, a conical slope is provided at the bottom of the drying box.

[0022] In the above technical solution, the existence of the conical slope enables the materials at the bottom of the drying box to automatically gather in the central area, which is convenient for subsequent collection and processing. It reduces the tediousness of manual operation and improves work efficiency. At the same time, the design of the conical slope also reduces the residue of materials at the bottom of the drying box, reducing the cleaning difficulty and maintenance cost.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The silicon-carbon negative electrode material drying device of the utility model adopts a double drying tower design. The material enters from the feed hopper and falls evenly onto the two drying towers under the action of the conical material distribution plate, thereby ensuring the uniformity of the falling material, so that both drying towers can achieve effective drying, avoiding the accumulation and blockage of the material during the drying process, and further increasing the feed volume, achieving continuous, large-scale and efficient drying of silicon-carbon negative electrode materials. Compared with the transmission disc dryer, the utility model can achieve double drying efficiency with one drying device, thereby greatly improving the drying efficiency of the material and reducing the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 The figure is a schematic diagram of the overall structure of an embodiment of the utility model.

[0027] Figure 2 It is a top view of a feed hopper according to an embodiment of the utility model.

[0028] Figure 3 It is a top view of the first heating plate according to an embodiment of the present invention.

[0029] Figure 4 It is a top view of the second heating plate according to an embodiment of the present invention.

[0030] Figure numerals: 1-drying box; 11-conical slope; 2-drying tower; 21-bracket; 22-first heating plate; 23-second heating plate; 3-driving mechanism; 31-rotating rod; 32-driving member; 321-motor; 322-first bevel gear; 323-second bevel gear; 33-first rake arm; 331-first rake leaf; 34-second rake arm; 341-second rake leaf; 4-feed hopper; 5-discharge pipe; 6-connecting frame; 61-first connecting rod; 62-second connecting rod; 621-limiting block; 7-conical dividing plate; 8-elastic member. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] Please refer to Figure 1-Figure 4 .

[0034] The present embodiment provides a silicon-carbon negative electrode material drying device, comprising a drying box 1, a drying tower 2 arranged in the drying box 1, and a driving mechanism 3 for driving the material to transfer on the drying tower 2; the drying towers 2 are arranged in two intervals, and a feed hopper 4 and a discharge pipe 5 are respectively provided at the top and bottom of the drying box 1, the feed hopper 4 is located between the two drying towers 2, and a connecting frame 6 is provided in the feed hopper 4, the connecting frame 6 extends into the drying box 1, and a conical dividing plate 7 is provided at one end extending into the drying box 1, and the edge of the dividing plate extends to directly above the two drying towers 2.

[0035] This embodiment adopts a double drying tower 2 design. The material enters from the feed hopper 4 and falls evenly onto the two drying towers 2 under the action of the conical dividing plate 7, thereby ensuring the uniformity of the falling material, so that both drying towers 2 can achieve effective drying, avoiding the accumulation and blockage of the material during the drying process, and further increasing the feed amount, achieving continuous, large-scale and efficient drying of silicon-carbon negative electrode materials. In addition, a feed hopper 4 is provided at the top of the drying box 1, and a discharge pipe 5 is provided at the bottom, that is, a single feed hopper 4 and a discharge pipe 5 are used, which ensures that both drying towers 2 can be effectively dried, and also allows the material to enter and exit the drying box 1 conveniently and quickly.

[0036] In this embodiment, the connecting frame 6 includes a first connecting rod 61 and a second connecting rod 62. The first connecting rod 61 is arranged on the inner wall of the feed hopper 4, one end of the second connecting rod 62 is arranged on the first connecting rod 61, and the other end extends into the drying box 1, and the conical dividing plate 7 is movably arranged on the second connecting rod 62.

[0037] Specifically, the first connecting rod 61 is installed on the inner wall of the feed hopper 4, ensuring the overall stability of the connecting frame 6 and avoiding the impact generated when the material enters, which may cause the structure to loosen or deform. The provision of the second connecting rod 62 allows the conical dividing plate 7 to be accurately positioned directly above the two drying towers 2. In addition, the conical dividing plate 7 can be movably arranged on the second connecting rod 62, so that the dividing plate can be flexibly adjusted according to actual production needs. For example, when it is necessary to adjust the distribution range of the material or change the flow direction of the material, it is only necessary to fine-tune the position or angle of the dividing plate, without having to replace or modify the entire connecting frame 6, which greatly reduces the maintenance cost and operation difficulty.

[0038] In this embodiment, a stopper 621 is provided at one end of the second connecting rod 62 extending into the drying box 1, and an elastic member 8 is sleeved on the second connecting rod 62, and the elastic member 8 is located between the stopper 621 and the conical material dividing plate 7. The elastic member 8 is a metal spring or elastic rubber, and is preferably a metal spring in this embodiment.

[0039] The setting of the limit block 621 can limit the maximum displacement of the conical material dividing plate 7, preventing it from being separated from the second connecting rod 62 due to excessive movement, and ensuring the stability and safety of the entire device. At the same time, the setting of the elastic member 8 allows the conical material dividing plate 7 to obtain a certain elastic force, so that when the material falls on the conical material dividing plate 7, the conical material dividing plate 7 will vibrate repeatedly due to the impact, thereby effectively preventing the material from sticking to the conical material dividing plate 7 to a certain extent and avoiding clogging.

[0040] In addition, both the metal spring and the elastic rubber have excellent elasticity and durability, and can be selected according to the specific use environment and needs. The use of the elastic member 8 can effectively enhance the stability and safety of the drying device, and provide reliable protection for the drying process of the silicon-carbon negative electrode material.

[0041] In this embodiment, the drying tower 2 includes a support 21, and a plurality of first heating discs 22 and second heating discs 23 arranged on the support 21, and the plurality of first heating discs 22 and second heating discs 23 are arranged at intervals and staggered in the vertical direction. The first heating discs 22 and second heating discs 23 are arranged at intervals and staggered in the vertical direction, so as to achieve more uniform and efficient heating and drying of the silicon-carbon negative electrode material. The staggered arrangement of the plurality of heating discs heats and dries the material in sequence, so that the material can be fully exposed to heat during the drying process, thereby avoiding uneven heating and accelerating the evaporation of water, thereby improving the drying speed.

[0042] Specifically, the diameter of the first heating disk 22 is smaller than the diameter of the second heating disk 23, and a through hole is provided at the center of the second heating disk 23. The driving mechanism 3 drives the material to fall from the edge of the first heating disk 22 into the second heating disk 23, and then fall from the through hole of the second heating disk 23 into another first heating disk 22.

[0043] In this embodiment, the diameter of the first heating disk 22 is smaller than the diameter of the second heating disk 23, which not only optimizes the layout of the heating space, but also makes the flow of the material during the heating process more reasonable and efficient. The material is continuously transferred from top to bottom between the first heating disk 22 and the second heating disk 23, thereby realizing the continuous flow of the material during the heating process, ensuring the uniform heating of the material during the heating process, and avoiding the difference in heating effect caused by uneven distribution of the material.

[0044] In this embodiment, the driving mechanism 3 includes a rotating rod 31 rotatably mounted on the drying box 1, a driving member 32 for driving the rotating rod 31 to rotate, and a plurality of first rake arms 33 and a second rake arm 34 arranged on the outer periphery of the rotating rod 31, the first rake arm 33 and the second rake arm 34 respectively abut against the upper surface of the first heating plate 22 and the second heating plate 23, and a plurality of first rake leaves 331 and a second rake leaf 341 are respectively arranged on the first rake arm 33 and the second rake leaf 341, and the first rake leaf 331 and the second rake leaf 341 are arranged obliquely and in opposite directions. Specifically, a plurality of first rake arms 33 are correspondingly arranged on the surface of each first heating plate 22, and correspondingly, a plurality of second rake arms 34 are correspondingly arranged on the surface of each second heating plate 23. A plurality of first rake leaves 331 are arranged at intervals in the length direction of the first rake arm 33, and a plurality of second rake leaves 341 are arranged at intervals in the length direction of the second rake arm 34.

[0045] The structural design of the driving mechanism 3 of this embodiment is ingenious and efficient, which not only realizes the automatic transportation and distribution of materials, but also ensures the uniform spreading and flow of materials on the heating disk through the cooperation of the rake arms and rake leaves. Among them, the first rake arm 33 and the first rake leaf 331 gradually push the material to the outer edge of the first heating disk 22 to fall into the second heating disk 23, and the second rake arm 34 and the second rake leaf 341 gradually push the material to the through hole of the second heating disk 23 to fall into the first heating disk 22, so as to ensure that the material can be transferred in an orderly manner.

[0046] In this embodiment, the driving member 32 includes a motor 321 disposed on the top of the drying box 1, a first bevel gear 322 disposed at the output end of the motor 321, and a second bevel gear 323 disposed on the rotating rod 31, and the first bevel gear 322 is meshedly connected with the second bevel gear 323. The arrangement of the motor 321 enables the driving process to be electrified, thereby improving the working efficiency. The meshing connection between the first bevel gear 322 and the second bevel gear 323 realizes the vertical transmission of power, so that the motor 321 and the rotating rod 31 can be in a mutually perpendicular state, thereby facilitating the installation of the motor 321 on the drying box 1, effectively saving the installation space, and optimizing the spatial layout.

[0047] The working principle of the driving mechanism 3 of this embodiment is as follows: the output shaft of the motor 321 rotates, and the rotating rod 31 is driven to rotate through the first bevel gear 322 and the second bevel gear 323. When the rotating rod 31 rotates, it will synchronously drive the first rake arm 33 and the second rake arm 34 to rotate. When the first rake arm 33 rotates, because it contacts the upper surface of the first heating disk 22, the material will be gradually pushed to the outer edge of the first heating disk 22 under the action of the first rake leaf 331 until the material falls onto the second heating disk 23; at the same time, when the second rake arm 34 rotates, because it contacts the upper surface of the second heating disk 23, the material will be gradually pushed into the through hole on the second heating disk 23 under the action of the second rake leaf 341 until it falls onto the other first heating disk 22. This process is repeated until the material falls from the discharge pipe 5 to complete the drying.

[0048] In this embodiment, a conical slope 11 is provided at the bottom of the drying box 1. The existence of the conical slope 11 enables the materials at the bottom of the drying box 1 to automatically gather in the central area, thereby facilitating subsequent collection and processing. This reduces the tediousness of manual operation and improves work efficiency. At the same time, the design of the conical slope 11 also reduces the residue of materials at the bottom of the drying box 1, reducing the cleaning difficulty and maintenance cost.

[0049] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the application product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicon-carbon negative electrode material drying device, comprising a drying box, a drying tower arranged in the drying box, and a driving mechanism for driving the material to transfer on the drying tower; characterized in that: There are two drying towers arranged at intervals, and a feed hopper and a discharge pipe are respectively provided at the top and bottom of the drying box. The feed hopper is located between the two drying towers, and a connecting frame is provided in the feed hopper. The connecting frame extends into the drying box, and a conical dividing plate is provided at one end extending into the drying box, and the edge of the dividing plate extends to directly above the two drying towers.

2. The silicon-carbon negative electrode material drying device according to claim 1, characterized in that: The connecting frame includes a first connecting rod and a second connecting rod, the first connecting rod is arranged on the inner side wall of the feed hopper, one end of the second connecting rod is arranged on the first connecting rod and the other end extends into the drying box, and the conical dividing plate is movably arranged on the second connecting rod.

3. The silicon-carbon negative electrode material drying device according to claim 2, characterized in that: A limit block is provided at one end of the second connecting rod extending into the drying box, and an elastic member is sleeved on the second connecting rod, and the elastic member is located between the limit block and the conical material dividing plate.

4. The silicon-carbon negative electrode material drying device according to claim 3, characterized in that: The elastic member is a metal spring or elastic rubber.

5. The silicon-carbon negative electrode material drying device according to claim 1, characterized in that: The drying tower comprises a support, and a plurality of first heating trays and a second heating tray arranged on the support, wherein the plurality of first heating trays and the second heating trays are spaced and staggered in a vertical direction.

6. The silicon-carbon negative electrode material drying device according to claim 5, characterized in that: The diameter of the first heating disk is smaller than that of the second heating disk. A through hole is provided at the center of the second heating disk. The driving mechanism drives the material to fall from the edge of the first heating disk into the second heating disk, and then fall from the through hole of the second heating disk into another first heating disk.

7. The silicon-carbon negative electrode material drying device according to claim 6, characterized in that: The driving mechanism includes a rotating rod rotatably mounted on the drying box, a driving member for driving the rotating rod to rotate, and a plurality of first rake arms and a second rake arms arranged on the outer periphery of the rotating rod, the first rake arms and the second rake arms respectively abut against the upper surfaces of the first heating plate and the second heating plate, the first rake arms and the second rake arms are respectively provided with a plurality of first rake leaves and a second rake leaves, the first rake leaves and the second rake leaves are inclined and have opposite inclination directions.

8. The silicon-carbon negative electrode material drying device according to claim 7, characterized in that: The driving member comprises a motor disposed on the top of the drying box, a first bevel gear disposed on the output end of the motor, and a second bevel gear disposed on the rotating rod, and the first bevel gear is meshedly connected with the second bevel gear.

9. The silicon-carbon negative electrode material drying device according to any one of claims 1 to 8, characterized in that: The bottom of the drying box is provided with a conical slope.

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