Sagger assembly

Abstract

The utility model provides a sagger assembly which comprises a sagger body, an opening containing cavity is formed in one side of the sagger body, and the containing cavity is provided with a bottom wall and a side wall. The sacrifice part is arranged in the containing cavity, and the sacrifice part covers at least part of the bottom wall and / or the side walls. According to the sagger assembly, the sintering product and at least part of the inner wall of the containing cavity can be separated through the sacrifice piece when materials are sintered, so that the problem that the sintering product adheres to the sagger body can be effectively solved, the receiving rate of the sintering product is increased, meanwhile, erosion of the sintering product to the sagger body can be reduced, and the service life of the sagger body is prolonged. And the service life of the sagger body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of battery material preparation, and more specifically, to a sagger assembly. Background Art

[0002] The oxide type sodium ion positive electrode material is a powder material prepared by high-temperature calcination and crushing. It is mainly calcined in a high-temperature kiln. The sagger is the main loading tool for the sintering of powder materials. Most sodium ion positive electrode materials: such as sodium nickel manganate, sodium copper iron manganate, sodium nickel iron manganate, etc., due to the addition of sodium carbonate in a specific proportion during the calcination process, result in a large number of intermediate products in the calcination process that are extremely corrosive. For example, molten sodium oxide at high temperature and sodium hydroxide contained in the product are very corrosive. In addition, during the sintering process, the sintered products are very easy to stick to the bottom of the sagger, which is not only difficult to clean, but also causes the loss of the sagger products. The sagger with sintered products sticking to the wall will also accelerate corrosion, affecting the service life of the sagger. Utility Model Content

[0003] The utility model aims to provide a new technical solution for a sagger assembly, which can at least solve the technical problem of short service life of the existing saggers.

[0004] The utility model provides a sagger assembly, comprising: a sagger body, one side of the sagger body is provided with an open accommodating cavity, the accommodating cavity has a bottom wall and a side wall; a sacrificial member, the sacrificial member is arranged in the accommodating cavity, the sacrificial member covers at least part of the bottom wall and / or the side wall.

[0005] Optionally, the sacrificial member is formed as a flexible breathable structure.

[0006] Optionally, the sacrificial member covers the bottom wall and the side walls.

[0007] Optionally, the sacrificial member includes: a first sacrificial portion and a second sacrificial portion, the first sacrificial portion is in contact with the bottom wall, and the second sacrificial portion is in contact with the side wall.

[0008] Optionally, the first sacrificial portion and the second sacrificial portion are integrally formed.

[0009] Optionally, a distance between an edge of the side wall away from the bottom wall and the bottom wall is d1, and a distance between an edge of the second sacrificial portion away from the bottom wall and the bottom wall is d2, wherein d2<d1.

[0010] Optionally, the accommodating cavity is formed as a cuboid, the sacrificial member includes four second sacrificial portions, and at least one of the second sacrificial portions is connected to the first sacrificial portion.

[0011] Optionally, the sacrificial member is ash-free filter paper, and the sacrificial member is provided with at least one first fold along the edge of the bottom wall, wherein the first fold separates the first sacrificial portion from the second sacrificial portion.

[0012] Optionally, the sacrificial member is formed in a cross shape, and is provided with four first folds, which respectively correspond to four edges of the bottom wall, and the four first folds cooperate with the edges of the sacrificial member to define the first sacrificial portion and the second sacrificial portion.

[0013] Optionally, the sacrificial part is formed into a ￢ shape, and the first fold separates the sacrificial part into a first functional part and a second functional part, wherein the first functional part is formed as the first sacrificial part, and the second functional part is provided with a plurality of second folds, and the plurality of second folds cooperate with the edge of the second functional part to define a plurality of second sacrificial parts.

[0014] Optionally, the thickness of the ash-free filter paper is 0.1 mm to 0.5 mm, and the air permeability pores of the ash-free filter paper are 10 μm to 200 μm.

[0015] According to the sagger assembly of the utility model, a sacrificial part is arranged in the accommodating chamber of the sagger body. The sacrificial part can separate the sintered product from at least a portion of the inner wall of the accommodating chamber when sintering the material, thereby effectively alleviating the problem of adhesion between the sintered product and the sagger body, improving the receipt rate of the sintered product, and at the same time reducing the erosion of the sagger body by the sintered product, thereby increasing the service life of the sagger body.

[0016] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0018] Figure 1 It is a three-dimensional diagram of a sagger assembly according to an embodiment of the utility model;

[0019] Figure 2 is a cross-sectional view of a sagger assembly according to an embodiment of the utility model;

[0020] Figure 3 This is a structural exploded view of a sagger assembly according to an embodiment of the utility model;

[0021] Figure 4 It is a schematic structural diagram of a sacrificial member of a sagger assembly in an expanded state according to an embodiment of the utility model;

[0022] Figure 5 It is a schematic structural diagram of a sacrificial component of a sagger assembly in an unfolded state according to another embodiment of the utility model.

[0023] Reference numerals

[0024] Sagger assembly 100;

[0025] Sagger body 10;

[0026] Bottom wall 11; side wall 12; raised portion 13;

[0027] Sacrificial part 20;

[0028] A first sacrificial portion 21 ; a second sacrificial portion 22 ; a first fold 23 ; and a second fold 24 . DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] The sagger assembly 100 according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 5 As shown, the sagger assembly 100 according to the embodiment of the present invention comprises: a sagger body 10 and a sacrificial member 20 .

[0036] Specifically, an open accommodating cavity is provided on one side of the sagger body 10 . The accommodating cavity has a bottom wall 11 and a side wall 12 . The sacrificial member 20 is provided in the accommodating cavity. The sacrificial member 20 covers at least a portion of the bottom wall 11 and / or the side wall 12 .

[0037] In other words, if Figures 1 to 5 As shown, the sagger assembly 100 according to the embodiment of the utility model can hold powder for preparing sodium ion positive electrode materials, and the sagger assembly 100 mainly includes a sagger body 10, and an opening installation cavity is provided on one side of the sagger body 10, and the installation cavity is suitable for holding the material to be sintered. A large number of intermediate products of the material are extremely corrosive during the sintering process, such as molten sodium oxide at high temperature and sodium hydroxide contained in the product, which are very corrosive, and during the sintering process, the sintered product is very easy to adhere to the inner wall of the containing cavity, which is not only difficult to clean, but also causes the loss of the sintered product, and the position where the sintered product adheres will also accelerate corrosion.

[0038] Based on this, the sagger assembly 100 of the present embodiment has a sacrificial part 20 disposed in the accommodating chamber before the sagger body 10 is loaded with materials. The sacrificial part 20 may cover at least a portion of the bottom wall 11 of the accommodating chamber, and / or at least a portion of the bottom wall 11 of the accommodating chamber. The sacrificial part 20 may be specifically determined according to the position where the sagger body 10 is easily adhered and corroded by the sintering products, which will not be described in detail in the present embodiment.

[0039] After the sacrificial member 20 covers the bottom wall 11 and / or the side wall 12 of the accommodating chamber, the material to be sintered can be placed in the accommodating chamber, and the sacrificial member 20 separates the material to be sintered from at least part of the inner wall of the accommodating chamber. The sacrificial member 20 will be automatically eliminated during the sintering process, and under the action of the sacrificial member 20, the problem of the material sticking to the sagger body 10 during the sintering process can be effectively alleviated, on the one hand, the receipt rate of the sintered product is improved, and on the other hand, since the sagger body 10 is not adhered to the sagger body 10, or the adhered sintered product is less, the corrosion of the sagger body 10 by the sintering product can be reduced, thereby improving the service life of the sagger body 10; at the same time, during the sintering process, the sacrificial member 20 separates the material from the sagger body 10 for a certain period of time, plays a certain protective role on the sagger body 10, and can effectively slow down the erosion of the sagger body 10 by the sintering product, thereby improving the service life of the sagger body 10.

[0040] Therefore, according to the sagger assembly 100 provided in the present embodiment, by arranging a sacrificial part 20 in the accommodating cavity of the sagger body 10, the sacrificial part 20 can separate the sintered product from at least a portion of the inner wall of the accommodating cavity when sintering the material, thereby effectively alleviating the problem of adhesion between the sintered product and the sagger body 10, improving the receipt rate of the sintered product, and at the same time reducing the erosion of the sagger product on the sagger body 10, thereby improving the service life of the sagger body 10.

[0041] According to an embodiment of the present invention, the sacrificial member 20 is formed as a flexible air-permeable structure.

[0042] In this embodiment, the sacrificial member 20 is a flexible breathable structure, for example, the sacrificial member 20 can be filter paper. The sacrificial member 20 adopts this structure, which not only facilitates the assembly of the sacrificial member 20 in the accommodating cavity, but also does not affect the air permeability of the sagger body 10 itself, thereby ensuring the quality of the material.

[0043] In some embodiments of the present invention, the sacrificial member 20 covers the bottom wall 11 and the side wall 12 .

[0044] Specifically, Figure 1 and Figure 2 As shown, before the sagger body 10 is loaded with materials, the bottom wall 11 of the accommodating cavity is covered by the sacrificial member 20, thereby effectively alleviating the problem of the material adhering to the bottom wall 11 of the accommodating cavity during the sintering process, thereby improving the yield of the sintered product and increasing the service life of the sagger body 10.

[0045] like Figure 1 and Figure 2 As shown, the sacrificial part 20 can cover the bottom wall 11 of the accommodating cavity while also covering one or more side walls 12 of the accommodating cavity, thereby alleviating the problem of material adhesion to the side walls 12 of the accommodating cavity during sintering, thereby further improving the yield of the sintered product and the service life of the sagger body 10.

[0046] According to an embodiment of the present invention, the sacrificial member 20 includes: a first sacrificial portion 21 and a second sacrificial portion 22 . The first sacrificial portion 21 is in contact with the bottom wall 11 , and the second sacrificial portion 22 is in contact with the side wall 12 .

[0047] In other words, if Figures 1 to 5 As shown, the sacrificial part 20 mainly includes a first sacrificial part 21 and a second sacrificial part 22, wherein the shape of the first sacrificial part 21 is formed as a sheet body corresponding to the shape of the bottom wall 11 of the accommodating cavity, and the second sacrificial part 22 is formed as a sheet body matching the side wall 12 of the accommodating cavity, and the number of the second sacrificial parts 22 can be determined according to actual needs.

[0048] Before the sagger body 10 is loaded with materials, the first sacrificial portion 21 can be attached to the bottom wall 11 of the accommodating cavity, and the second sacrificial portion 22 can be attached to the corresponding side wall 12 of the accommodating cavity. Thus, the first sacrificial portion 21 and the second sacrificial portion 22 can alleviate the problem of the material adhering to the inner wall of the accommodating cavity during the sintering process, improve the receiving rate of the sintered product, and improve the service life of the sagger body 10.

[0049] In some embodiments of the present invention, the first sacrificial portion 21 and the second sacrificial portion 22 are integrally formed.

[0050] That is to say, the integral molding of the first sacrificial part 21 and the second sacrificial part 22 can facilitate the processing of the sacrificial part 20, protect the transition part between the bottom wall 11 and the side wall 12 of the accommodating cavity, and further improve the receiving rate of the sintered product and the service life of the sagger body 10.

[0051] like Figure 2 As shown, according to an embodiment of the present invention, the distance between the edge of the side wall 12 away from the bottom wall 11 and the bottom wall 11 is d1, and the distance between the edge of the second sacrificial portion 22 away from the bottom wall 11 and the bottom wall 11 is d2, wherein d2<d1.

[0052] like Figure 2 As shown, in this embodiment, the second sacrificial portion 22 is smaller than the side wall 12 of the accommodating cavity in the height direction of the accommodating cavity.

[0053] When in use, the second sacrificial portion 22 is lower than the opening end of the accommodating cavity, so that the material to be sintered can completely cover the sacrificial part 20, so that the environment in which the sacrificial part 20 is located during the sintering of the material is relatively oxygen-deficient, thereby avoiding the sacrificial part 20 from over-reacting in high-temperature air and affecting the performance of the material.

[0054] In some embodiments of the present invention, the accommodating cavity is formed as a cuboid, and the sacrificial member 20 includes four second sacrificial portions 22 , and at least one second sacrificial portion 22 is connected to the first sacrificial portion 21 .

[0055] Specifically, Figures 1 to 5 As shown, the accommodating cavity is formed into a rectangular parallelepiped structure, and the accommodating cavity has a bottom wall 11 and four side walls 12 adjacent to the bottom wall 11 , and the number of the second sacrificial portions 22 is the same as that of the bottom wall 11 , so that each side wall 12 of the accommodating cavity can be protected by the four second sacrificial portions 22 .

[0056] Therefore, according to the sagger assembly 100 of the utility model, the problem of material adhesion to the sagger body 10 during the sintering process can be alleviated, the receipt rate of the sintered product can be improved, and the service life of the sagger body 10 can be improved; and the second sacrificial portion 22 can be connected to the first sacrificial portion 21, so that the transition portion between the bottom wall 11 and the side wall 12 can be protected.

[0057] According to an embodiment of the present invention, the sacrificial member 20 is ash-free filter paper. The sacrificial member 20 is provided with at least one first fold 23 along the edge of the bottom wall 11 . The first fold 23 separates the first sacrificial portion 21 from the second sacrificial portion 22 .

[0058] That is to say, ash-free filter paper can be used as the sacrificial part 20. The ash-free filter paper has good air permeability and will not affect the air permeability of the sagger body 10 itself. Moreover, the filter paper is a carbohydrate and will be slowly carbonized, decomposed and volatilized during high-temperature sintering. It will not cause impurity contamination to the sintered product (such as sodium ion positive electrode material), and the quality of the sintered product can be guaranteed.

[0059] like Figure 4 and Figure 5 As shown, the sacrificial member 20 is provided with at least one first fold 23 along the edge of the bottom wall 11 of the accommodating cavity. The first sacrificial portion 21 can be separated from the second sacrificial portion 22 by the first fold 23, so that the sacrificial member 20 can be processed into a desired structure at a low processing cost.

[0060] In this embodiment, the sacrificial member 20 is ash-free filter paper, which has a relatively low cost. Compared with the prior art in which an anti-corrosion layer is provided on the inner side of the sagger body 10 , the production cost of the electrode material can be greatly reduced.

[0061] In some embodiments of the present invention, the sacrificial member 20 is formed in a cross shape, and the sacrificial member 20 is provided with four first folds 23, which respectively correspond to the four edges of the bottom wall 11, and the four first folds 23 cooperate with the edges of the sacrificial member 20 to define a first sacrificial portion 21 and a second sacrificial portion 22.

[0062] Specifically, Figure 4 As shown, the sacrificial member 20 can be roughly formed into a cross-shaped structure, and the sacrificial member 20 is provided with first folds 23 corresponding to the four edges of the bottom wall 11 of the accommodating cavity, and the four first folds 23 cooperate with each other to define the first sacrificial portion 21, and the four first folds 23 respectively cooperate with the edges of the sacrificial member 20 to define four second sacrificial portions 22. When the sacrificial member 20 is assembled with the sagger body 10, the four first folds 23 facilitate the second sacrificial portion 22 to move to a set position, which can improve the assembly efficiency of the sacrificial member 20 and the sagger body 10, thereby improving the production efficiency of the sintered product.

[0063] According to one embodiment of the utility model, the sacrificial part 20 is formed into a ￢ shape, and the first fold 23 separates the sacrificial part 20 into a first functional part and a second functional part, wherein the first functional part is formed as a first sacrificial part 21, and the second functional part is provided with a plurality of second folds 24, and the plurality of second folds 24 cooperate with the edge of the second functional part to define a plurality of second sacrificial parts 22.

[0064] That is to say, Figure 5As shown, the sacrificial part 20 can be roughly formed into a ￢-shaped structure, and the sacrificial part 20 is provided with a first fold 23, and the first fold 23 separates the sacrificial part 20 into a first functional part and a second functional part, wherein the first functional part corresponds to the shape of the bottom wall 11 of the accommodating cavity, so that the first functional part can be formed as a first sacrificial part 21; the second functional part is formed into a long strip, and the second functional part is provided with three second folds 24 extending along its width direction, and the three second folds 24 are spaced apart along the length direction of the second functional part, so that the three second folds 24 can separate the second functional part into four second sacrificial parts 22.

[0065] In this embodiment, the ash-free filter paper adopts the above structure to facilitate layout when preparing the sacrificial component 20, which can reduce the waste of ash-free filter paper.

[0066] In some examples of the present invention, the thickness of the ash-free filter paper is 0.1 mm to 0.5 mm, and the diameter of the air holes of the ash-free filter paper is 10 μm to 200 μm.

[0067] In some embodiments of the present invention, the sagger body 10 is provided with a plurality of protrusions 13 on the side of the accommodating cavity opening, and the plurality of protrusions 13 are spaced apart from each other. For example, four protrusions 13 may be provided, and the four protrusions 13 may be provided at the four corners of the sagger body 10 .

[0068] When a plurality of sagger bodies 10 are stacked for use, ventilation space can be reserved between adjacent sagger bodies 10 through the protrusions 13, so that waste generated during sintering can be discharged in time, thereby improving the quality and performance of the sintered product.

[0069] In some specific examples of the present invention, the size of the sagger body 10 is 330 mm*330 mm*100 mm, the wall thickness is 10 mm, and the sintered material is a sodium ion positive electrode material Na 0.8 Cu 0.25 Fe 0.35 Mn 0.40 O2, the sintering system is 900℃ insulation and total cycle 30h.

[0070] According to the above method, the experiment was conducted. Five sagger assemblies 100 (a sagger body 10 provided with a sacrificial member 20, wherein the sacrificial member 20 covers the bottom wall 11 of the accommodating cavity, the sacrificial member is ash-free filter paper, the thickness of the ash-free filter paper is 0.1 mm to 0.5 mm, and the pore diameter of the ash-free filter paper is 10 μm to 200 μm) were selected in the embodiment, and five sagger bodies 10 were selected in the comparative example as well. The sintering was repeated on the production line, and the statistical data were as follows:

[0071] Data Sheet

[0072] project Sagger cycle life Average material receipt rate / % Material capacity / 2.5V-4.0V Example-1 48 99.8 108.4 Example-2 39 99.9 107.9 Example-3 52 99.9 108.3 Example-4 55 99.8 108.5 Example-5 62 99.9 107.8 Example - Average 51 99.9 108.2 Comparative Example-1 18 98.5 108.3 Comparative Example-2 15 97.9 108.5 Comparative Example-3 14 98.0 107.7 Comparative Example-4 13 97.8 108.1 Comparative Example-5 16 99.0 108.0 Comparison ratio - average 15 98.2 108.1

[0073] Data determination instructions:

[0074] 1. Determination of cartridge cycle life

[0075] The following can be judged as discarded sagger bodies 10: the sagger bodies 10 are broken, have large cracks, are severely peeled, have missing pieces, etc., which affect their continued use, and cannot be used for loading materials.

[0076] 2. Determination of average yield of sintered products

[0077] After each sintering, the sintered products that can be poured out by simple pouring are judged as the received sintered products, or the sintered products that are slightly stuck to the wall and need to be brushed off with a brush or scraped off with a small spatula are judged as the sintered products received. The rest of the sintered products that are not easy to obtain due to corrosion and are stuck to the sintering bowl body 10, or the unusable sintered products that are removed because they are stuck to the sintering bowl material, are all wasted sintering products. The ratio of the weight of the sintered products received to the weight of the sintered products that should be received theoretically is the average receiving rate of the sintered products, and the average receiving rate is the average receiving rate of all single sinterings during the life cycle.

[0078] 3. Material capacity determination

[0079] Three sintering products were randomly selected and prepared into conventional button batteries respectively. The capacity of 2.5V to 4.0V was tested at a rate of 0.1C, and the average value of the three times was taken as the material capacity value.

[0080] It can be seen from the above data table that using the sagger assembly 100 of the embodiment of the utility model for sintering can ensure the product performance of the sintered product, and can alleviate the problem of material adhesion to the sagger body 10 during the sintering process, can improve the receipt rate of the sintered product, and can increase the service life of the sagger body 10.

[0081] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A sagger assembly, characterized in that: include: A sagger body (10), wherein one side of the sagger body (10) is provided with an open accommodating cavity, wherein the accommodating cavity has a bottom wall (11) and a side wall (12); A sacrificial member (20), wherein the sacrificial member (20) is ash-free filter paper, the sacrificial member (20) is arranged in the accommodating cavity, and the sacrificial member (20) covers at least a portion of the bottom wall (11) and / or the side wall (12).

2. The sagger assembly according to claim 1, characterized in that: The sacrificial member (20) covers the bottom wall (11) and the side wall (12).

3. The sagger assembly according to claim 1, characterized in that: The sacrificial member (20) comprises: A first sacrificial portion (21) and a second sacrificial portion (22), wherein the first sacrificial portion (21) is in contact with the bottom wall (11), and the second sacrificial portion (22) is in contact with the side wall (12).

4. The sagger assembly according to claim 3, characterized in that: The first sacrificial portion (21) and the second sacrificial portion (22) are integrally formed.

5. The sagger assembly according to claim 3, characterized in that: The distance between the edge of the side wall (12) away from the bottom wall (11) and the bottom wall (11) is d1, and the distance between the edge of the second sacrificial portion (22) away from the bottom wall (11) and the bottom wall (11) is d2, wherein d2<d1.

6. The sagger assembly according to claim 3, characterized in that: The accommodating cavity is formed as a rectangular parallelepiped, and the sacrificial member (20) comprises four second sacrificial parts (22), and at least one of the second sacrificial parts (22) is connected to the first sacrificial part (21).

7. The sagger assembly according to claim 6, characterized in that: The sacrificial member (20) is provided with at least one first fold (23) along the edge of the bottom wall (11), and the first fold (23) separates the first sacrificial portion (21) from the second sacrificial portion (22).

8. The sagger assembly according to claim 7, characterized in that: The sacrificial member (20) is formed in a cross shape, and is provided with four first folds (23). The four first folds (23) respectively correspond to the four edges of the bottom wall (11), and the four first folds (23) cooperate with the edges of the sacrificial member (20) to define the first sacrificial portion (21) and the second sacrificial portion (22).

9. The sagger assembly according to claim 7, characterized in that: The sacrificial member (20) is formed into a ￢ shape, and the first fold (23) separates the sacrificial member (20) into a first functional portion and a second functional portion, wherein: The first functional part is formed as the first sacrificial part (21), and the second functional part is provided with a plurality of second folds (24). The plurality of second folds (24) cooperate with the edge of the second functional part to form a plurality of second sacrificial parts (22).

10. The sagger assembly according to claim 1, characterized in that: The thickness of the ash-free filter paper is 0.1 mm to 0.5 mm, and the diameter of the air holes of the ash-free filter paper is 10 μm to 200 μm.

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