Rhombic material box unit and graphitization material box

Abstract

The utility model provides a rhombic material box unit and a graphitization material box. Each rhombic material box unit comprises two first carbon plates which are oppositely arranged in a first direction X and two second carbon plates which are oppositely arranged in a second direction Y, and the first direction X and the second direction Y are perpendicular to each other in the thickness direction of the first carbon plates; buckles are arranged at the two ends of the first carbon plate, clamping grooves are formed in the two ends of the second carbon plate, and the buckles are clamped in the clamping grooves, so that the first carbon plate and the second carbon plate are sequentially enclosed to form a rhombus. According to the utility model, the two convex (buckle) and concave (clamping groove) carbon plates are spliced to form the material box, and a stand column is omitted, so that the material consumption of the material box is reduced, and the use and maintenance cost of the material box is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of box-type graphitization furnaces, in particular to a rhombus material box unit and a graphitization material box. Background Art

[0002] The graphitization process is a process that makes full use of resistance heat to heat the carbonaceous material to 2300-3000℃, so that the amorphous chaotic layer structure of carbon is converted into an ordered graphite crystalline structure. At present, the furnace types used in the graphitization process of negative electrode materials are mainly Acheson graphitization furnace, internal heat series graphitization furnace, box-type graphitization furnace and continuous graphitization furnace. Among them, the box-type graphitization furnace is widely used because of its large one-time furnace loading and low graphitization per ton powder cost. The box-type graphitization furnace divides the entire furnace core into several equal volume chambers, and the negative electrode material is directly placed in the material box surrounded by graphite plates. Because the graphite plate (carbon plate) is conductive, the material box itself heats up after power is turned on. The material box can achieve the purpose of heating the material while serving as a container for the negative electrode material.

[0003] The main material of the current box-type graphitization furnace is the square material box structure (such as Figure 7 As shown in the figure, it includes a carbon plate and a column, the carbon plate is inserted around the column, and the columns are inserted at both ends of the carbon plate to achieve splicing. The square material box has the following problems:

[0004] 1. Current density distribution and uneven temperature (such as Figure 7 As shown in the figure, there is a large temperature difference in different areas, and the material is heated unevenly, which affects the graphitization degree and quality of the negative electrode material;

[0005] (ii) The material box needs to use columns to assemble multiple carbon plates, which increases the production cost;

[0006] (iii) Because the material box is a consumable and prone to deformation and breakage, in addition to replacing the carbon plate, the column also needs to be replaced, resulting in a high replacement cost. Utility Model Content

[0007] The utility model aims to provide a rhombus material box unit and a graphitized material box without pillars, thereby improving the uniformity of current density distribution.

[0008] The technical solution of the utility model is: a rhombus material box unit, comprising two first carbon plates arranged opposite to each other in a first direction X and two second carbon plates arranged opposite to each other in a second direction Y, wherein the first direction X and the second direction Y are perpendicular to each other in the thickness direction of the first carbon plate; buckles are provided at both ends of the first carbon plate, and slots are provided at both ends of the second carbon plate, wherein the buckles are engaged in the slots, so that the first carbon plate and the second carbon plate are enclosed in sequence to form a rhombus.

[0009] Preferably, the buckle includes a first plate extending along the Y direction and a second plate extending along the X direction, one end of the first plate is connected to the end surface of the first carbon plate, the other end of the first plate is connected to the second plate, the first plate and the second plate are arranged at both ends of the first carbon plate, a first groove and a second groove are formed between the second plate and the first carbon plate, and the first groove and the second groove are respectively arranged on both sides of the first plate; the card groove is a U-shaped groove, so that the second carbon plate forms a card wall, the card wall is inserted into the first groove, and one end of the first plate is placed in the card groove.

[0010] Preferably, the card slot has a width W1, the first plate has a thickness W2, W1=2×W2, or W1>2×W2.

[0011] Preferably, a plurality of the first carbon plates and the second carbon plates are stacked in sequence in the height direction Z.

[0012] The utility model also provides a graphitization material box, comprising at least one of the above-mentioned diamond-shaped material box units.

[0013] The utility model also provides a graphitized material box, which includes the above-mentioned diamond-shaped material box units assembled together, the first plate of one of the diamond-shaped material box units and the first plate of another of the diamond-shaped material box units are simultaneously inserted into the slot on the second carbon plate of the same diamond-shaped material box unit, and the card wall of one of the diamond-shaped material box units and the card wall of another of the diamond-shaped material box units are respectively carded into the first groove and the second groove on the first carbon plate of the same diamond-shaped material box unit.

[0014] Compared with the related art, the beneficial effects of the utility model are:

[0015] 1. The material box is formed by assembling two carbon plates, one convex (snap) and one concave (slot), eliminating the columns, reducing the material consumption of the material box, and reducing the use and maintenance costs of the material box;

[0016] Second, the material box is designed in a diamond shape, which can improve the uniformity of current density distribution, make the resistance of each carbon plate uniform, and there is no problem of bias current;

[0017] 3. The current density is evenly distributed, which greatly improves the uniformity of material temperature and the life of the entire furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a diamond-shaped material box unit provided by the utility model;

[0019] Figure 2 is a schematic structural diagram of a first carbon plate;

[0020] Figure 3 is a schematic diagram of the structure of the second carbon plate;

[0021] Figure 4 A schematic diagram of stacking a plurality of diamond-shaped material box units in the height direction;

[0022] Figure 5 A schematic diagram of the structure of the graphitization material box provided by the utility model;

[0023] Figure 6 A schematic diagram of the assembly details of two first carbon plates and two second carbon plates;

[0024] Figure 7 It is the current density distribution diagram of the rectangular material box;

[0025] Figure 8 This is the current density distribution diagram of the diamond box.

[0026] In the accompanying drawings: 1, first carbon plate; 2, second carbon plate; 21, card slot; 22, card wall; 3, buckle; 31, first plate; 32, second plate; 33, first groove; 34, second groove. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0028] Embodiment 1

[0029] like Figure 1 As shown, a diamond-shaped material box unit provided in this embodiment includes two first carbon plates 1 arranged opposite to each other in a first direction X and two second carbon plates 2 arranged opposite to each other in a second direction Y, wherein the first direction X and the second direction Y are perpendicular to each other in the thickness direction of the first carbon plate 1. Buckles 3 are provided at both ends of the first carbon plate 1, and slots 21 are provided at both ends of the second carbon plate 2. The buckles 3 are engaged in the slots 21, so that the first carbon plate 1 and the second carbon plate 2 are enclosed in sequence to form a diamond shape.

[0030] To ensure the structural stress and the structural strength of the first carbon plate 1 and the second carbon plate 2 after thermal expansion and contraction, the first carbon plate 1 and the second carbon plate 2 have a size of 50-100 mm thick, 600-1500 mm long, and 300-700 mm high.

[0031] This embodiment also provides a graphitization material box, including the above-mentioned diamond-shaped material box unit.

[0032] Embodiment 2

[0033] The first embodiment is repeated, except that the graphitization box in this embodiment includes a plurality of the above-mentioned diamond-shaped box units, and the buckles 3 of the adjacent first carbon plates 1 are interlocked with the slots 21 of the second carbon plates 2 to assemble the plurality of diamond-shaped box units.

[0034] Embodiment 3

[0035] like Figure 1 , Figure 2 As shown, the buckle 3 includes a first plate 31 extending along the Y direction and a second plate 32 extending along the X direction. One end of the first plate 31 is connected to the end face of the first carbon plate 1, and the other end of the first plate 31 is connected to the second plate 32. The first plate 31 and the second plate 32 are arranged at both ends of the first carbon plate 1. The first plate 31 and the second plate 32 form a T-shaped structure. A first groove 33 and a second groove 34 are formed between the second plate 32 and the first carbon plate 1. The first groove 33 and the second groove 34 are respectively arranged on both sides of the first plate 31. The card slot 21 is a U-shaped groove, so that the second carbon plate 2 forms a card wall 22. The card wall 22 is inserted into the first groove 33, and one end of the first plate 31 is placed in the card slot 21.

[0036] The slot 21 has a width W1, and the first plate 31 has a thickness W2, where W1=2×W2, or, considering the processing error and for the convenience of installation, the design size of W1 is slightly larger than 2×W2.

[0037] like Figure 5 As shown, this embodiment also provides a graphitization material box comprising a plurality of the above-mentioned diamond-shaped material box units assembled together. Figure 6 As shown, the first plate 31 of one diamond-shaped material box unit and the first plate 31 of another diamond-shaped material box unit are simultaneously inserted into the slot 21 on the second carbon plate 2 of the same diamond-shaped material box unit, and the card wall 22 of one diamond-shaped material box unit and the card wall 22 of another diamond-shaped material box unit are respectively clamped in the first groove 33 and the second groove 34 on the first carbon plate 1 of the same diamond-shaped material box unit.

[0038] like Figure 2 As shown, after a diamond-shaped material box unit is assembled, the second groove 34 of the first carbon plate 1 on it is assembled with the second carbon plate 2 of the diamond-shaped material box unit on the other side. The slot 21 on the second carbon plate 2 can simultaneously insert two first carbon plates 1. Figure 5 The graphitized material box shown.

[0039] like Figure 5 As shown, in order to improve the utilization rate of the space in the graphitization furnace, the surrounding carbon plates can be encapsulated to form a triangular material box.

[0040] like Figure 6As shown, after the buckles 3 on the two butted first carbon plates 1 are butted, they are inserted into the buckle slots 21 of the two butted second carbon plates 2. This concave-convex interlocking method can form an interlocking structure to ensure the stability of the connection structure.

[0041] In addition, a heat expansion strip can be provided on the inner bottom surface of the card slot 21, and the end of the first plate 31 contacts the heat expansion strip. Heat expansion strips can also be provided on the inner bottom surfaces of the first groove 33 and the second groove 34, and the end of the card wall 22 contacts the heat expansion strip. The heat expansion strip is an elastic, soft contact material that can be carbonized at high temperature (such as a rubber strip or a plastic strip). The function of the heat expansion strip is to reserve space for the thermal expansion of the carbon plate and reduce the fracture of the carbon plate after high-temperature expansion.

[0042] like Figure 8 As shown, the improved diamond-shaped material box of the utility model can improve the uniformity of current density distribution, so that the resistance of the carbon plate is uniform and consistent without biased current.

[0043] Embodiment 4

[0044] like Figure 4 As shown, according to the height of the graphitization furnace, a plurality of diamond-shaped material box units are stacked in the height direction Z. The plurality of stacked units can be stacked on the basis of the material boxes formed in the above three embodiments, respectively, and are specifically determined according to the size of the inner cavity of the graphitization furnace.

[0045] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A diamond-shaped material box unit, characterized in that: The invention comprises two first carbon plates (1) arranged opposite to each other in a first direction X and two second carbon plates (2) arranged opposite to each other in a second direction Y, wherein the first direction X and the second direction Y are perpendicular to each other in the thickness direction of the first carbon plate (1); buckles (3) are provided at both ends of the first carbon plate (1), and slots (21) are provided at both ends of the second carbon plate (2); the buckles (3) are snapped into the slots (21), so that the first carbon plate (1) and the second carbon plate (2) are sequentially enclosed to form a rhombus.

2. The diamond-shaped material box unit according to claim 1, characterized in that: The buckle (3) comprises a first plate (31) extending in the Y direction and a second plate (32) extending in the X direction, one end of the first plate (31) is connected to the end surface of the first carbon plate (1), and the other end of the first plate (31) is connected to the second plate (32), the first plate (31) and the second plate (32) are arranged at both ends of the first carbon plate (1), a first groove (33) and a second groove (34) are formed between the second plate (32) and the first carbon plate (1), and the first groove (33) and the second groove (34) are arranged on both sides of the first plate (31); the clamping groove (21) is a U-shaped groove, so that the second carbon plate (2) forms a clamping wall (22), the clamping wall (22) is inserted into the first groove (33), and one end of the first plate (31) is placed in the clamping groove (21).

3. The diamond-shaped material box unit according to claim 2, characterized in that: The card slot (21) has a width W1, the first plate (31) has a thickness W2, W1=2×W2, or W1>2×W2.

4. The diamond-shaped material box unit according to claim 1, characterized in that: A plurality of the first carbon plates (1) and the second carbon plates (2) are stacked in sequence in the height direction Z.

5. A graphitization material box, characterized in that: Comprising at least one diamond-shaped container unit as claimed in claim 1.

6. A graphitization material box, characterized in that: It comprises a plurality of diamond-shaped material box units as described in any one of claims 2 to 4, wherein the first plate (31) of one diamond-shaped material box unit and the first plate (31) of another diamond-shaped material box unit are simultaneously inserted into the slot (21) on the second carbon plate (2) of the same diamond-shaped material box unit, and the card wall (22) of one diamond-shaped material box unit and the card wall (22) of another diamond-shaped material box unit are respectively carded into the first groove (33) and the second groove (34) on the first carbon plate (1) of the same diamond-shaped material box unit.

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