Saggar structure

Abstract

The application relates to a sagger structure, which comprises a sagger body, an inner cavity with a top opening, a material loading platform fixed to the bottom wall of the inner cavity, and a ventilation pipe arranged on the bottom wall of the inner cavity and staggered with the material loading platform, wherein the ventilation pipe is provided with a gas passing channel communicated with the inner cavity; the gas passing channel is used for inputting reaction gas into the inner cavity, the inner cavity is used for containing reactants, and the material loading platform is used for placing materials, so that the reaction gas, the reactants and the materials can be subjected to homogenization reaction in the inner cavity. When sintering is carried out, the reactants can be placed in the inner cavity of the sagger structure, the materials are placed on the material loading platform, and the reaction gas is input into the inner cavity through the gas passing channel, so that the reaction gas can diffuse in the inner cavity, the reaction gas can continuously and sufficiently contact the reactants and the materials, the sintering quality and the sintering efficiency of the positive electrode material of the power battery are improved, and dynamic homogenization of the materials to be sintered in the in-situ reaction process is realized.

Description

Technical Field

[0001] This application relates to the field of lithium battery manufacturing technology, and in particular to a crucible structure. Background Technology

[0002] Currently, lithium batteries possess advantages such as high energy density, high open-circuit voltage, low self-discharge rate, no memory effect, and environmental friendliness, and are widely used in fields such as smart communication tools and new energy vehicles. Among them, lithium batteries using ternary materials as cathode materials have better overall performance, low cost, high energy density and voltage, and small size.

[0003] The production of lithium-ion battery cathode materials requires homogenization using a sagger, which involves placing the lithium-ion battery cathode material into a sagger, then placing the sagger in a sintering furnace for sintering at high temperatures. Existing saggers for lithium-ion battery cathode materials often employ a simple rectangular open-top box structure, which can easily lead to localized over-burning or incomplete reaction during the sintering process. Utility Model Content

[0004] Therefore, it is necessary to provide a new sagger structure to address the problem that existing saggers are prone to local overheating or incomplete reaction during the material sintering process.

[0005] A sagger structure includes: a sagger body, including an inner cavity with a top opening; a material carrier platform fixed to the bottom wall of the inner cavity; and a vent pipe disposed on the bottom wall of the inner cavity and offset from the material carrier platform, the vent pipe having a gas passage communicating with the inner cavity; wherein the gas passage is used to input reaction gas into the inner cavity, the inner cavity is used to contain reactants, and the material carrier platform is used to place materials, so that the reaction gas, the reactants, and the materials undergo a homogenization reaction in the inner cavity.

[0006] The aforementioned sagger structure includes an inner cavity with an open top. The bottom wall of the inner cavity is equipped with a material carrier platform and a vent pipe. During sintering, the reactants can be placed in the inner cavity of the sagger structure, the material is placed on the material carrier platform, and the reaction gas is introduced into the inner cavity through the vent pipe, allowing the reaction gas to diffuse within the inner cavity. This effectively promotes mass and heat transfer of the reactants during the sintering process, achieving uniform distribution of the reaction gas and material. This ensures continuous and sufficient contact between the reaction gas and the reactants and material, which is beneficial for improving the sintering quality and efficiency of the positive electrode material of the power battery. It also realizes the dynamic homogenization of the material to be sintered during the in-situ reaction process.

[0007] In some embodiments, the sagger structure further includes at least two insert plates, each of which protrudes from the bottom wall of the inner cavity and divides the inner cavity into at least two chambers, each of which is provided with at least one of the vent pipes.

[0008] In some embodiments, each chamber is provided with at least two ventilation tubes, and all the ventilation tubes are spaced apart in each chamber.

[0009] In some embodiments, each of the vents is configured as a hollow cylindrical structure with openings at both ends along its height.

[0010] In some embodiments, each of the vent pipes and the bowl body are integrally formed; and / or, each of the insert plates and the bowl body are integrally formed.

[0011] In some embodiments, the sagger structure further includes a partition, with at least one partition provided in each chamber, the partition dividing the chamber into at least two layers along its height direction.

[0012] In some embodiments, in each of the chambers, the height of each vent tube is higher than the height of the partition, and the partition is provided with a clearance groove for each vent tube to pass through.

[0013] In some embodiments, the separator is configured as a mesh structure with multiple openings.

[0014] In some embodiments, the material carrier is located at the center of the bowl, and each of the insert plates is evenly distributed around the material carrier with the material carrier as the center.

[0015] In some embodiments, the number of bowls is at least two, and each bowl is stacked along a first direction, which is the height direction of the bowl; in two adjacent bowls, the top wall of one bowl is provided with a positioning protrusion, and the bottom wall of the other bowl is provided with a positioning groove, and the positioning groove is inserted into the positioning protrusion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the sagger structure in some embodiments of this application.

[0017] Figure 2 This is a schematic diagram of the sagger structure in some other embodiments of this application.

[0018] Figure label:

[0019] 100. Bowl body; 101. Inner cavity; 102. Chamber; 103. Positioning protrusion; 200. Material loading platform; 300. Vent pipe; 301. Air passage; 400. Insert plate; 500. Divider; 501. Clearance groove; 502. Mesh. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this application, 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", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0022] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this application, unless otherwise expressly specified and limited, the terms "initial," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Please refer to Figure 1 In one embodiment, the sagger structure includes a sagger body 100, a material carrier platform 200, and a vent pipe 300. The sagger body 100 includes an inner cavity 101 with a top opening. The material carrier platform 200 is fixed to the bottom wall of the inner cavity 101. The vent pipe 300 is disposed on the bottom wall of the inner cavity 101 and is offset from the material carrier platform 200. The vent pipe 300 has an air passage 301 communicating with the inner cavity 101. The air passage 301 is used to input reaction gas into the inner cavity 101. The inner cavity 101 is used to contain reactants. The material carrier platform 200 is used to place materials so that the reaction gas, reactants, and materials undergo a homogenization reaction in the inner cavity 101.

[0027] It should be noted that the sagger structure is used for sintering the positive electrode material of power batteries. During the entire sintering process, the sagger structure is placed inside an industrial kiln such as a roller kiln or a box kiln. During sintering, the reactants are placed in the inner cavity 101 of the sagger structure, the material is placed on the loading platform 200, and the reaction gas is introduced into the inner cavity 101 through the gas passage 301. This allows the reaction gas to diffuse within the inner cavity 101 and undergo a homogenization reaction with the reactants and material, thereby achieving the sintering of the positive electrode material of the power battery.

[0028] Optionally, the material is a reactant or a catalyst.

[0029] The aforementioned sagger structure includes a sagger body 100 with an open top cavity 101. The bottom wall of the cavity 101 is provided with a material carrier platform 200 and a vent pipe 300. During sintering, the reactants can be placed in the cavity 101 of the sagger structure, and the material is placed on the material carrier platform 200. The reaction gas is introduced into the cavity 101 through the vent pipe 301, allowing the reaction gas to diffuse within the cavity 101. This effectively promotes mass and heat transfer of the reactants during the sintering process, achieving uniform distribution of the reaction gas and material. This ensures that the reaction gas, reactants, and material can maintain continuous and sufficient contact, which is beneficial for improving the sintering quality and efficiency of the positive electrode material of the power battery. It also realizes the dynamic homogenization of the material to be sintered during the in-situ reaction process.

[0030] In the embodiments of this application, the bowl 100 includes an inner cavity 101 with an open top. The inner cavity 101 can be in various shapes. For example, the inner cavity 101 can be a cuboid, a cylinder, or other shaped cavity with an open top. The shape of the inner cavity 101 is not specifically limited here.

[0031] In the embodiments of this application, the loading platform 200 is fixed to the bottom wall of the inner cavity 101. The loading platform 200 can be fixed to the bottom wall of the inner cavity 101 in a variety of ways, such as by welding, snap-fitting, riveting, etc.

[0032] In the embodiments of this application, the vent pipe 300 is disposed on the bottom wall of the inner cavity 101 and is offset from the material carrier 200. The vent pipe 300 can be disposed on the bottom wall of the inner cavity 101 in various ways, such as by welding, snap-fitting, riveting, etc. The vent pipe 300 and the material carrier 200 are offset from each other, that is, the vent pipe 300 and the material carrier 200 are staggered and have no overlapping parts.

[0033] In the embodiments of this application, the vent pipe 300 has a gas passage 301 communicating with the inner cavity 101. The gas passage 301 is used to input the reaction gas into the inner cavity 101. That is, one end of the gas passage 301 can communicate with the inner cavity 101, and the other end of the gas passage 301 is connected to the outside, so that the reaction gas from the outside can be input into the inner cavity 101 through the gas passage 301. The number of gas passages 301 is not limited to one, that is, at least two gas passages 301 can be provided in the same vent pipe 300.

[0034] For details, please refer to Figure 1 The sagger structure also includes at least two insert plates 400, each insert plate 400 protruding from the bottom wall of the inner cavity 101 and dividing the inner cavity 101 into at least two chambers 102, each chamber 102 being provided with at least one vent pipe 300.

[0035] The beneficial effect here is that by providing at least one vent pipe 300 in each chamber 102, the reactants and reactant gases placed in each chamber 102 can be in continuous and sufficient contact, thereby further improving the sintering quality and sintering efficiency of the positive electrode material of the power battery.

[0036] In the embodiments of this application, each insert plate 400 protrudes from the bottom wall of the inner cavity 101, that is, each insert plate 400 protrudes from the bottom wall of the inner cavity 101, and the height of each insert plate 400 is equal to or less than the height of the inner cavity 101. Each insert plate 400 can be fixed to the bottom wall of the inner cavity 101 in various ways. For example, each insert plate 400 and the bowl 100 are separate structures, and each insert plate 400 is fixed to the bottom wall of the inner cavity 101 by welding, snap-fitting, riveting, etc.; or, for another example, each insert plate 400 and the bowl 100 can be an integral structure, and each insert plate 400 is integrally formed to the bottom wall of the inner cavity 101 by injection molding or casting.

[0037] In the embodiments of this application, the shape and size of each insert plate 400 can be exactly the same to facilitate the uniform distribution of the size of the chamber 102; the shape and size of each insert plate 400 can be different to facilitate the flexible adjustment of the size of the chamber 102 according to the actual situation.

[0038] In the embodiments of this application, each chamber 102 is provided with at least one vent pipe 300. One end of the vent pipe 300 is located inside the chamber 102, and the other end of the vent pipe 300 can be flush with the bottom wall of the chamber 102 or extend out of the bottom wall of the chamber 102. The vent pipe 300 can be provided in the chamber 102 in various ways, for example, the vent pipe 300 can be fixed in the chamber 102 by welding, snap-fitting, riveting, etc.

[0039] For details, please refer to Figure 1 Each chamber 102 is provided with at least two vent pipes 300, and all vent pipes 300 are spaced apart in each chamber 102.

[0040] The beneficial effect here is that the reactant gas can diffuse rapidly in each chamber 102, and the reactants and reactant gas placed in each chamber 102 can be in continuous and sufficient contact, further improving the sintering quality and sintering efficiency of the positive electrode material of the power battery.

[0041] In the embodiments of this application, all ventilation tubes 300 are spaced apart in each chamber 102, and all ventilation tubes 300 can be arranged in various ways. For example, all ventilation tubes 300 are arranged in a rectangular array, a circular array, or other arrays in each chamber 102; or, for example, all ventilation tubes 300 are arranged radially outward from the center of the inner cavity 101.

[0042] In the embodiments of this application, all the ventilation tubes 300 may have the same shape and size to facilitate the uniform distribution of ventilation tubes 300 in each chamber 102; the shape and size of each insert plate 400 may be different to facilitate the flexible adjustment of ventilation tubes 300 in each chamber 102 according to the actual situation.

[0043] For more specific details, please refer to Figure 1 Each vent tube 300 is constructed as a hollow cylindrical structure with openings at both ends along its own height direction.

[0044] It should be noted that the height direction of the ventilator 300 is... Figure 1 The Z direction shown is the height direction of the inner cavity 101.

[0045] The beneficial effect here is that by setting each vent pipe 300 as a hollow cylindrical structure with open ends and limiting the size of each vent pipe 300, the reaction gas can be rapidly diffused in each chamber 102 without occupying too much space in the chamber 102, which helps to improve space utilization.

[0046] In the embodiments of this application, each ventilator 300 is constructed as a hollow cylindrical structure with openings at both ends along its own height direction. The cylindrical structure includes a cylinder, an elliptical cylinder, a square cylinder, or other shapes.

[0047] In the embodiments of this application, the height of each ventilator 300 is 90mm~110mm, the diameter of each ventilator 300 is 10mm~30mm, and the wall thickness of each ventilator 300 is 1mm~2mm. Preferably, the height of each ventilator 300 is 100mm, the diameter of each ventilator 300 is 20mm, and the wall thickness of each ventilator 300 is 2mm.

[0048] For a specific embodiment, please refer to Figure 1 Each vent pipe 300 and the bowl body 100 are integral structures; and / or each insert plate 400 and the bowl body 100 are integral structures.

[0049] The beneficial effects here are: it makes the overall structure of the sagger better and the mechanical strength higher, reduces the probability that gaps in the connection between the components of the sagger structure will affect the sintering quality, and helps to improve the sintering quality and sintering efficiency of the positive electrode material of the power battery.

[0050] In the embodiments of this application, each vent pipe 300 and the bowl 100 are integral structures. Each vent pipe 300 and the bowl 100 can be integrally formed by injection molding or casting, etc. The integral forming method is not specifically limited here.

[0051] In the embodiments of this application, each insert plate 400 and the bowl 100 are integral structures. Each insert plate 400 and the bowl 100 can be integrally formed by injection molding or casting, etc. The integral forming method is not specifically limited here.

[0052] Please refer to Figure 1The sagger structure also includes a partition 500, with at least one partition 500 provided in each chamber 102, which divides the chamber 102 into at least two layers along its height direction.

[0053] It should be noted that the height direction of chamber 102 is... Figure 1 The Z-direction is shown. The separator 500 divides the chamber 102 into at least two layers along its height direction. Each layer can hold reactants with different activities. For example, reactants with low activity are placed in the layers near the bottom wall of the chamber 102, and reactants with high activity are placed in the other layers away from the bottom wall of the chamber 102. This allows reactants with low activity to be located in the region with higher sintering temperature and reactants with high activity to be located in the region with lower sintering temperature, so that reactants with different activities can be fully sintered at the same time.

[0054] The beneficial effect here is that the separator 500 divides the chamber 102 into at least two layers along its height direction, and each layer can hold reactants with different activities, so that reactants with different activities can be fully sintered at the same time, which improves the application range and practicality of the sagger structure.

[0055] In the embodiments of this application, the separator 500 can be in various shapes, such as a rectangular plate, a circular plate, or other shapes. The shape of the separator 500 is not specifically limited here.

[0056] In the embodiments of this application, the partition 500 can be disposed in the chamber 102 in a variety of ways, such as by welding, snap-fitting, riveting, etc.

[0057] For details, please refer to Figure 1 In each chamber 102, the height of each vent pipe 300 is higher than the height of the partition 500, and the partition 500 is provided with a clearance groove 501 for each vent pipe 300 to pass through.

[0058] It is understandable that in each chamber 102, the height of each vent tube 300 is higher than the height of the partition 500. That is, one end of each vent tube 300 is located in the chamber 102 and passes through the partition 500, and the other end of each vent tube 300 can be flush with the bottom wall of the chamber 102 or can extend out to the bottom wall of the chamber 102.

[0059] The beneficial effect here is that one end of each vent pipe 300 is located inside the chamber 102 and passes through the partition 500, so that the height of the vent pipe 300 is high enough, and the reaction gas output from the vent pipe 300 can continuously and fully contact the reactants placed in each layer, which is beneficial to improving the sintering quality and sintering efficiency of the positive electrode material of the power battery.

[0060] In the embodiments of this application, the separator 500 is provided with a clearance groove 501 for each vent pipe 300 to pass through. The inner diameter of the clearance groove 501 is equal to or greater than the outer diameter of the vent pipe 300, that is, the size of the clearance groove 501 must be large enough for the vent pipe 300 to pass through. The clearance groove 501 can be square, circular or other shapes, as long as the clearance groove 501 can allow the vent pipe 300 to pass through.

[0061] For more specific details, please refer to Figure 2 The separator 500 is constructed as a mesh structure with multiple mesh openings 502.

[0062] The beneficial effect here is that by setting the separator 500 as a mesh structure and defining the aperture of the mesh 502, the separator 500 can carry the reactants and facilitates full contact between the reactants and the reaction gas on the separator 500.

[0063] In the embodiments of this application, the separator 500 is constructed as a mesh structure with a plurality of mesh openings 502, the shape and size of each mesh opening 502 may be exactly the same or different. The separator 500 is made of a material with good heat resistance, for example, a stainless steel mesh or a tungsten-plated mesh.

[0064] In the embodiments of this application, the aperture of each mesh 502 is 70-90 mesh. Preferably, the aperture of each mesh 502 is 80 mesh.

[0065] Please refer to Figure 2 The material carrier platform 200 is located at the center of the bowl body 100, and each insert plate 400 is evenly distributed around the material carrier platform 200 with the material carrier platform 200 as the center.

[0066] It should be noted that the material carrier 200 is located at the center of the bowl 100, that is, the material carrier 200 is located at the geometric center of the bowl 100.

[0067] The beneficial effect here is that each insert plate 400 is evenly distributed around the material carrier platform 200, which can divide the inner cavity 101 into multiple chambers 102 around the material carrier platform 200. This allows the reactants and reactant gases placed in each chamber 102 to be in continuous and sufficient contact, further improving the sintering quality and sintering efficiency of the positive electrode material of the power battery.

[0068] In the embodiments of this application, each insert plate 400 is evenly distributed around the material carrier 200. The shape and size of each insert plate 400 can be exactly the same or different. For example, there are four insert plates 400, which are rectangular plates of the same size. The four insert plates 400 are arranged perpendicularly to each other and located around the material carrier 200 to divide the inner cavity 101 of the bowl 100 into four chambers 102 of the same size.

[0069] For example, refer to Figure 2 The center of the loading platform 200 overlaps with the center of the bowl 100, and both the loading platform 200 and the bowl 100 are constructed as cuboid structures with open tops. This allows reactants and materials to be placed into corresponding positions within the bowl 100 through the openings, and facilitates uniform and sufficient contact between reactants, materials, and reaction gases.

[0070] In the embodiments of this application, the wall thickness of the bowl 100 is 5mm to 20mm, the length of the bowl 100 is 200mm to 400mm, and the width of the bowl 100 is 200mm to 400mm. Preferably, the wall thickness of the bowl 100 is 10mm, the length of the bowl 100 is 300mm, and the width of the bowl 100 is 300mm.

[0071] In the embodiments of this application, the wall thickness of the loading platform 200 is 10mm~30mm; the length of the loading platform 200 is 50mm~150mm; and the width of the loading platform 200 is 10mm~30mm. Preferably, the wall thickness of the loading platform 200 is 20mm; the length of the loading platform 200 is 100mm; and the width of the loading platform 200 is 20mm.

[0072] Please refer to Figure 2 The number of bowls 100 is at least two, and each bowl 100 is stacked along a first direction, which is the height direction of the bowl 100; in two adjacent bowls 100, the top wall of one bowl 100 is provided with a positioning protrusion 103, and the bottom wall of the other bowl 100 is provided with a positioning groove, which is inserted and engaged with the positioning protrusion 103.

[0073] It should be noted that the first direction is Figure 2 The Z direction shown is the height direction of the bowl body 100.

[0074] The beneficial effect here is that by interlocking the positioning groove and the positioning protrusion 103, multiple bowls 100 can be stacked, thereby enabling the simultaneous sintering of multiple or various lithium battery cathode materials, which greatly improves production efficiency.

[0075] In the embodiments of this application, the positioning groove and the positioning protrusion 103 are trapezoidal. When the bowl body 100 is stacked, the positioning protrusion 103 is inserted into the positioning groove. The positioning protrusion 103 is less likely to come into frictional contact with the positioning groove, thereby reducing resistance and facilitating the stacking of the bowl body 100. Furthermore, the top of the positioning protrusion 103 can also be set as a rounded corner to facilitate the positioning protrusion 103 entering the positioning groove when the bowl body 100 is stacked.

[0076] In the embodiments of this application, the number of positioning grooves and positioning protrusions 103 is not limited to one. When the number of positioning grooves and positioning protrusions 103 is at least two, the positioning grooves and positioning protrusions 103 are set in a one-to-one correspondence.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A sagger structure, characterized in that, include: The bowl body, including the inner cavity with an opening at the top; A loading platform is fixed to the bottom wall of the inner cavity; A vent pipe is provided on the bottom wall of the inner cavity and is offset from the material platform. The vent pipe has an air passage that communicates with the inner cavity. The gas passage is used to input the reaction gas into the inner cavity, the inner cavity is used to contain the reactants, and the material platform is used to place the material, so that the reaction gas, the reactants, and the material can undergo a homogenization reaction in the inner cavity.

2. The sagger structure according to claim 1, characterized in that, The sagger structure also includes at least two insert plates, each of which protrudes from the bottom wall of the inner cavity and divides the inner cavity into at least two chambers, each of which is provided with at least one vent pipe.

3. The sagger structure according to claim 2, characterized in that, Each chamber is provided with at least two ventilation pipes, and all the ventilation pipes are spaced apart in each chamber.

4. The sagger structure according to claim 2, characterized in that, Each of the vent pipes is constructed as a hollow cylindrical structure with openings at both ends along its height.

5. The sagger structure according to claim 2, characterized in that, Each of the aforementioned vent pipes and the bowl body are integrally formed; And / or, each of the aforementioned insert plates and the bowl body are integral structures.

6. The sagger structure according to claim 2, characterized in that, The sagger structure also includes a partition, with at least one partition provided in each chamber, the partition dividing the chamber into at least two layers along its height direction.

7. The sagger structure according to claim 6, characterized in that, In each of the chambers, the height of each vent pipe is higher than the height of the partition, and the partition is provided with a clearance groove for each vent pipe to pass through.

8. The sagger structure according to claim 6, characterized in that, The separator is constructed as a mesh structure with multiple openings.

9. The sagger structure according to claim 2, characterized in that, The material-carrying platform is located at the center of the bowl, and each of the insert plates is evenly distributed around the material-carrying platform.

10. The sagger structure according to claim 1, characterized in that, The number of bowls is at least two, and each bowl is stacked along a first direction, which is the height direction of the bowl. In two adjacent bowls, one bowl has a positioning protrusion on its top wall and the other bowl has a positioning groove on its bottom wall, the positioning groove being inserted into the positioning protrusion.

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