A box-type structure of the charge box for a graphitization furnace

Abstract

The present invention discloses a box-type graphitization furnace charge box structure, which includes a box body. There are multiple unit chambers arranged side by side inside the box body. A plurality of groups of electric heating components distributed in a matrix are connected in each unit chamber. The electric heating components are composed of strip-shaped support plates and electric heating wires attached to the surfaces of the strip-shaped support plates. The two ends of the strip-shaped support plates and the electric heating wires are respectively connected to the side walls of the unit chambers. For this box-type graphitization furnace charge box structure, the electric heating wires arranged in a matrix inside the box body can uniformly heat the inner layer of the materials in the charge box. The box body and the electric heating wires enable the inner and outer layers of the materials to be heated simultaneously, which can improve the production quality of the negative electrode materials. Moreover, the electric heating wires are supported by the strip-shaped support plates, with good structural stability and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of box-type graphitization furnaces, and particularly relates to a box-type graphitization furnace charge box structure. Background Art

[0002] The box-type graphitization furnace is currently used in the production of lithium battery anode graphite materials. In the existing box-type graphitization furnace, the entire furnace core is divided into several equal-volume chambers, and the negative electrode material is directly placed in a charge box surrounded by graphite plates. Since the graphite plate material has electrical conductivity, after being energized, the charge box itself generates heat, and the charge box can heat the material while serving as a container for the negative electrode material.

[0003] However, since the heating method of the charge box for the material is from the inside out, due to the small heat generation cross-section of the plate, the temperature at the position close to the plate is extremely high. Moreover, the thermal conductivity of the carbon material decreases as the temperature increases, resulting in a large temperature difference in the thermal field distribution in different regions, uneven heating of the material, and poor quality of the produced negative electrode graphite material. Summary of the Invention

[0004] To solve the technical problems in the background art, the present invention proposes a box-type graphitization furnace charge box structure.

[0005] A box-type graphitization furnace charge box structure proposed by the present invention includes a box body. The box body has a plurality of unit chambers arranged side by side. Each unit chamber is connected with a plurality of groups of electric heating components distributed in a matrix. The electric heating component is composed of a strip-shaped support plate and an electric heating wire attached to the surface of the strip-shaped support plate. The two ends of the strip-shaped support plate and the electric heating wire are respectively connected to the side wall of the unit chamber.

[0006] Preferably, the side wall of the unit chamber of the box body is spliced by columns, side plates and partition plates. The columns are arranged in two parallel rows at intervals. Slots are provided on the side surface of the columns. The side plates are installed between adjacent two of each row of columns by inserting into the slots. The partition plates are installed between the two rows of columns by inserting into the slots.

[0007] Preferably, the partition plates are stacked in multiple layers along the slot direction of the columns. A notch portion is provided at the edge of the partition plate. The notch portions of adjacent two layers of partition plates enclose an installation hole for connecting the electric heating components.

[0008] Preferably, the shape of the notch portion is a right triangle. The notch portions of the two right triangles enclosing the installation hole are offset by a certain distance, so that the installation hole has a rectangular area and triangular areas located at two diagonal positions of the rectangular area; the rectangular area of the installation hole cooperates with the end of the strip-shaped support plate, and one electric heating wire is clamped and fixed in each of the two triangular areas of the installation hole.

[0009] Preferably, the side plates are stacked in multiple layers along the slot direction of the columns.

[0010] Preferably, the columns, side plates and partition plates of the box body are all made of graphite.

[0011] Preferably, the slots on the columns are rectangular slots.

[0012] Preferably, the strip-shaped support plate is made of graphite.

[0013] Preferably, the heating wire is made of tungsten wire.

[0014] Preferably, a bottom plate is laid on the bottom of the box body.

[0015] In the present invention, the box-type graphitization furnace charge box structure can uniformly heat the inner layer of the materials in the charge box through the heating wires arranged in a matrix in the box body. The box body and the heating wires heat the inner and outer layers of the materials simultaneously, which can improve the production quality of the negative electrode materials. At the same time, the heating wires of the charge box structure are supported by strip-shaped support plates, and the structural stability is good. It can avoid the movement of the heating wires caused by the settlement of the materials during loading, make the current passing amount uniform, so that the inside of the box body generates heat uniformly, make the quality of the whole furnace of materials uniform, and also avoid the breakage of the heating wires due to the sinking of the materials, and has a long service life. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of a box-type graphitization furnace charge box structure proposed in the embodiment;

[0017] Figure 2 is Figure 1 a partial view of the box-type graphitization furnace charge box structure in

[0018] Figure 3 is a schematic structural view of the partition plate in the embodiment;

[0019] Figure 4 is a schematic structural view of the electric heating assembly after being installed on the partition plate in the embodiment. Detailed Embodiments

[0020] Please refer to Figures 1-4 As shown, according to a box-type graphitization furnace charge box structure of an embodiment of the present invention, the charge box structure includes a box body 1. There are a plurality of unit chambers 11 arranged side by side in the box body 1. The upper ends of the respective unit chambers 11 of the box body 1 have openings. A plurality of groups of electric heating assemblies 2 distributed in a matrix are connected in each unit chamber 11. The electric heating assembly 2 is composed of a strip-shaped support plate 21 and a heating wire 22 attached to the surface of the strip-shaped support plate 21. The two ends of the strip-shaped support plate 21 and the heating wire 22 are respectively connected to the side walls of the unit chamber 11.

[0021] This material box structure is used in a box-type graphitization furnace. During operation, the negative electrode graphite material is placed in each unit chamber 11 of the box body 1, and the current is transmitted to the side wall of the box body 1 through the furnace head electrode. The box body 1 and the electric heating component 2 are both made of resistance materials. The material of the box body 1 and the strip support plate 21 is preferably graphite, and the material of the heating wire 22 is preferably tungsten wire. The box body 1 and the electric heating component 2 are energized and heated to heat the negative electrode material to achieve the purpose of graphitization.

[0022] Because the box body 1 and heating wire 22 of this material box structure heat the inner and outer layers of the material simultaneously, uniform heating of the material is ensured, thereby improving the production quality of the negative electrode material. Furthermore, the heating wire 22 of this material box structure is supported by the strip support plate 21, which provides excellent structural stability. This prevents the heating wire 22 from moving due to material settling during loading, ensuring uniform current flow, thereby ensuring uniform heating within the box body 1 and consistent material quality throughout the furnace. Furthermore, the strip support plate 21 prevents the heating wire 22 from breaking due to material settling, thereby extending its service life.

[0023] In this embodiment, the side walls of the unit chamber 11 of the box body 1 are composed of columns 12, side panels 13 and partitions 14. The columns 12 are arranged in two parallel rows at intervals. The columns 12 are fixed in the graphitization furnace. The side of the column 12 is provided with a slot 121. The slot 121 on the column 12 is a rectangular slot. The side panels 13 are installed between two adjacent columns 12 in each row by plugging into the slot 121. The side panels 13 are specifically stacked into multiple layers along the direction of the slot 121 of the column 12. The partition 14 is installed between the two rows of columns 12 by plugging into the slot 121. The columns 12, side panels 13 and partitions 14 of the box body 1 are all made of graphite. The box body 1 is formed by splicing the columns 12, side panels 13 and partitions 14, which makes it convenient to build and dismantle the material box structure in the graphitization furnace and facilitate the work of loading and unloading the negative electrode material.

[0024] In a further embodiment, the partitions 14 are stacked in multiple layers along the slots 121 of the pillars 12. The edges of the partitions 14 are provided with notches 141. The notches 141 of two adjacent layers of partitions 14 together form a mounting hole 15 for connecting the electric heating component 2. By forming the mounting hole 15 with the stacked layers of partitions 14, the strip support plate 21 and the heating wire 22 of the electric heating component 2 can be positioned and installed in the mounting hole 15, making installation of the electric heating component 2 more convenient.

[0025] Since the negative electrode material needs to be filled in the bin structure, it is necessary to ensure the sealing performance between the mounting hole 15 and the electric heating component 2. Therefore, a small mounting gap is required between the mounting hole 15 and the electric heating component 2. Producing the shaped notch portion 141 to make the mounting hole 15 cooperate with the strip-shaped support plate 21 and the heating wire 22 will increase the production difficulty of the partition 14 and also raise the production cost. However, there will be a large gap between the mounting hole 15 with a regular shape and the strip-shaped support plate 21 and the heating wire 22, making it difficult to ensure the sealing performance. Moreover, it is also very difficult to position the heating wire 22, which may cause the position of the heating wire 22 to change during the loading process, and even lead to the strip-shaped support plate 21 being unable to support the heating wire 22, causing the heating wire 22 to settle or break.

[0026] Therefore, as Figure 3 and 4 shown, in this example, the shape of the notch portion 141 is a right triangle. The two right triangle notch portions 141 enclosing the mounting hole 15 are staggered by a certain distance, so that the mounting hole 15 has a rectangular region 151 and triangular regions 152 located at two diagonal positions of the rectangular region 151. The rectangular region 151 of the mounting hole 15 cooperates with the end of the strip-shaped support plate 21, and one heating wire 22 is respectively clamped and fixed in the two triangular regions 152 of the mounting hole 15.

[0027] Through the design of the right triangle notch portion 141 on the partition 14 in this example, and the mounting hole 15 formed by staggering the notch portions 141 of the upper and lower layers of the partition 14 by a certain distance, it is possible to ensure the sealing performance between the mounting hole 15 and the electric heating component 2, and at the same time position the heating wire 22, so that the heating wire 22 can maintain its position unchanged during loading, thus ensuring the heating effect. At the same time, the shape of the notch portion 141 on the partition 14 is regular, and the production and manufacturing are simple.

[0028] Therefore, according to the design of the bin structure of this embodiment, it is possible to facilitate production and construction while ensuring good structural stability of the heating wire 22, avoid the movement or breakage of the heating wire 22 caused by the settlement of materials during loading, reduce the loss of the heating wire 22, and improve the service life of the heating wire 22. In addition, this assembly method makes the disassembly and assembly of the box body 1 and the heating wire 22 very convenient, facilitating the loading and unloading operations of materials. The resistance wire does not need to be installed layer by layer with the materials during loading, which can improve the efficiency of loading and unloading materials and reduce the labor intensity of workers.

[0029] In this embodiment, the bin structure further includes a bottom plate 3, which is laid at the bottom of the box body 1, and the bottom plate 3 is also made of graphite.

[0030] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A box structure of a box-type graphitization furnace charge box, characterized in that, It includes a box body (1). Inside the box body (1), there are multiple unit chambers (11) arranged side by side. Inside each unit chamber (11), multiple groups of electric heating components (2) distributed in a matrix are connected. The electric heating component (2) is composed of a strip-shaped support plate (21) and an electric heating wire (22) attached to the surface of the strip-shaped support plate (21). The two ends of the strip-shaped support plate (21) and the electric heating wire (22) are respectively connected to the side walls of the unit chamber (11). The side walls of the unit chamber (11) of the box body (1) are spliced by columns (12), side plates (13) and partition plates (14). The columns (12) are arranged in two parallel rows at intervals. Slots (121) are provided on the sides of the columns (12). The side plates (13) are installed between two adjacent ones in each row of columns (12) by inserting into the slots (121). The partition plates (14) are installed between the two rows of columns (12) by inserting into the slots (121). The partition plates (14) are stacked in multiple layers along the direction of the slots (121) of the columns (12). Notched portions (141) are provided at the edges of the partition plates (14). The notched portions (141) of two adjacent layers of partition plates (14) enclose an installation hole (15) for connecting the electric heating component (2). The shape of the notched portion (141) is a right triangle. The notched portions (141) of the two right triangles enclosing the installation hole (15) are offset by a certain distance, so that the installation hole (15) has a rectangular area (151) and triangular areas (152) located at two diagonal positions of the rectangular area (151). The rectangular area (151) of the installation hole (15) cooperates with the end of the strip-shaped support plate (21). One electric heating wire (22) is respectively clamped and fixed in the two triangular areas (152) of the installation hole (15).

2. The hopper structure of the box-type graphitization furnace according to claim 1, wherein The side plates (13) are stacked in multiple layers along the direction of the slots (121) of the columns (12).

3. The hopper structure of the box-type graphitization furnace according to claim 1, characterized in that, The materials of the columns (12), side plates (13) and partition plates (14) of the box body (1) are all graphite.

4. The hopper structure of the box-type graphitization furnace according to claim 1, characterized in that, The slots (121) on the columns (12) are rectangular slots.

5. The charging box structure of the box-type graphitization furnace according to any one of claims 1-4, characterized in that, The material of the strip-shaped support plate (21) is graphite.

6. The charge box structure of the box-type graphitization furnace according to any one of claims 1-4, characterized in that, The material of the electric heating wire (22) is tungsten wire.

7. The charging box structure of the box-type graphitization furnace according to any one of claims 1-4, characterized in that, A bottom plate (3) is laid at the bottom of the box body (1).

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