Graphite sagger for sintering positive electrode material

Abstract

The utility model relates to the technical field of lithium iron phosphate sintering, in particular to a graphite sagger for sintering a positive electrode material. Comprising a sagger body, a separation assembly, a first flow guide channel and a second flow guide channel, the separation assembly is arranged in the sagger body, the first flow guide channel is arranged on the upper wall of the sagger body, and the second flow guide channel is arranged on the outer side wall of the sagger body; an opening is formed in the upper wall of the sagger body, and the first flow guide channel is formed in the opening; a plurality of bosses are fixedly connected to the side wall of the sagger body, and the second flow guide channel is formed between every two adjacent bosses on the same side wall of the sagger body; and the first flow guide channel and the second flow guide channel are arranged, air flow channels can be formed between the sagger bodies distributed up and down and between the sagger bodies distributed left and right in the sintering furnace, and heat dissipation of materials is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium iron phosphate sintering, in particular to a graphite sagger used for sintering positive electrode materials. Background Art

[0002] Lithium iron phosphate is a lithium-ion battery electrode material, mainly used as the positive electrode material of various lithium-ion batteries. Lithium iron phosphate has the advantages of high safety, long cycle life and low cost, and is widely used in many fields including portable electronic devices, automobiles, ships and energy storage. The preparation method of lithium iron phosphate is to mix iron phosphate, lithium carbonate and carbon source in pure water and then use a sand mill to perform a nano-process. After the nano-process is completed, the obtained slurry is sprayed and granulated to obtain a precursor. The precursor is sintered and crushed to obtain the final lithium iron phosphate material. A large amount of graphite crucibles are required in the sintering process, but conventional graphite crucibles are weak in strength and have poor heating and heat dissipation effects.

[0003] Prior art CN216482285U discloses a sagger for producing lithium iron phosphate positive electrode materials, including a sagger body, the sagger body including a bottom plate and a side plate fixedly connected to the bottom plate, the bottom plate and the side plate forming a holding cavity for holding materials, the holding cavity is provided with a transverse heat conducting plate and a longitudinal heat conducting plate, the transverse heat conducting plate and the longitudinal heat conducting plate are fixedly connected to the side plate at both ends, and the bottom is fixedly connected to the bottom plate. Although the above-mentioned sagger increases the strength and improves the heating and heat dissipation effects by setting the transverse heat conducting plate and the longitudinal heat conducting plate, it is inconvenient to dump the materials in the holding cavity, and the heat dissipation effect needs to be strengthened.

[0004] Therefore, it is urgent to provide a graphite sagger for sintering positive electrode materials, which is convenient for material pouring and improves heat dissipation effect compared with the prior art. Utility Model Content

[0005] The utility model solves the technical problems existing in the prior art and provides a graphite sagger for sintering positive electrode materials.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A graphite sagger for sintering positive electrode materials comprises a sagger body, a partition assembly, a first guide channel and a second guide channel, wherein the partition assembly is arranged inside the sagger body, the first guide channel is arranged on the upper wall of the sagger body, and the second guide channel is arranged on the outer side wall of the sagger body; a notch is provided on the upper wall of the sagger body, and the notch is the first guide channel; a plurality of bosses are fixedly connected to the side wall of the sagger body, and the second guide channel is formed between two adjacent bosses on the same side wall of the sagger body.

[0008] Furthermore, the boss includes a first bending portion and a second bending portion that are integrally connected, the first bending portion and the second bending portion are perpendicular to each other, the first bending portion and the second bending portion are respectively fixedly connected to the side walls adjacent to the sagger body; the second guide channel is formed between the first bending portion and the second bending portion connected on the same side wall of the sagger body.

[0009] Furthermore, the thickness of the first bending portion and the second bending portion are both half of the depth of the notch.

[0010] Furthermore, the sagger body comprises a bottom plate and a surrounding frame, and the upper wall of the bottom plate is fixedly connected to the surrounding frame.

[0011] Furthermore, the partition assembly includes mutually perpendicular transverse partitions and longitudinal partitions, both ends of the transverse partition are fixedly connected to the inner side wall of the frame, both ends of the longitudinal partition are also fixedly connected to the inner side wall of the frame, and both the transverse partition and the longitudinal partition are fixedly connected to the upper wall of the base plate.

[0012] Furthermore, a first arc surface is provided at the intersection of the transverse partition and the longitudinal partition.

[0013] Furthermore, a second arc surface is provided between the transverse partition and the inner side wall of the surrounding frame, and a second arc surface is also provided between the longitudinal partition and the inner side wall of the surrounding frame.

[0014] Furthermore, the transverse partition is provided in plurality, and / or the longitudinal partition is provided in plurality.

[0015] Furthermore, a third arc surface is provided between two adjacent inner side walls of the surrounding frame.

[0016] Furthermore, the upper end of the partition component is lower than the bottom of the notch.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The utility model is provided with a first guide channel and a second guide channel, and air flow channels are formed between the sagger bodies distributed vertically and horizontally in the sintering furnace to accelerate the heat dissipation of the material.

[0019] (2) In the present invention, a first arc surface is arranged between the transverse partition and the longitudinal partition, a second arc surface is arranged between the transverse partition, the longitudinal partition and the side wall of the frame, and a third arc surface is arranged between two adjacent inner walls of the frame, all of which are for the purpose of facilitating the dumping of materials and preventing the materials from being retained inside the sagger body.

[0020] (3) The utility model is provided with a partition assembly, which increases the contact area between the material and the sagger body, enhances the thermal conductivity, makes heating and heat dissipation faster, reduces the material required to be heated in the same area, and makes the heating of the material more uniform. At the same time, the cross-arrangement of the horizontal partition and the vertical partition also plays a role in enhancing the strength of the sagger body itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Description of reference numerals:

[0023] 1. sagger body; 11. bottom plate; 12. frame; 2. boss; 21. first bending portion; 22. second bending portion; 3. notch; 4. transverse partition; 5. longitudinal partition; 6. first arc surface; 7. second arc surface; 8. third arc surface. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] like Figure 1 As shown, the utility model provides a graphite sagger for sintering positive electrode materials, including a sagger body 1, a separator component, a first guide channel and a second guide channel. The sagger body 1 is made of graphite, and a accommodating cavity is provided inside the sagger body 1. A separator component is arranged inside the accommodating cavity. A first guide channel is provided on the upper part of the sagger body 1, and the first guide channel is used to separate the sagger bodies 1 stacked in the vertical direction. A second guide channel is provided on the side wall of the sagger body 1, and the second guide channel is used to separate the sagger bodies 1 arranged in the horizontal direction.

[0026] The sagger body 1 comprises a bottom plate 11 and a surrounding frame 12. The upper wall of the bottom plate 11 is fixedly connected to the surrounding frame 12. The surrounding frame 12 and the bottom plate 11 form a accommodating cavity. The upper wall of the surrounding frame 12 is provided with a notch 3. The notch 3 forms a first guide channel. The depth of the notch 3 is 10 cm. The dimensions of the sagger body 1 are: 330 cm in length, 330 cm in width, and 160 cm in height. The bottom plate 11 is 15 cm thick, and the surrounding frame 12 is 13 cm thick.

[0027] The partition assembly divides the accommodating cavity into a plurality of small accommodating cavities, and the partition assembly includes a transverse partition 4 and a longitudinal partition 5, the transverse partition 4 is vertically connected to the longitudinal partition 5, and is a cross-shaped, both ends of the transverse partition 4 are fixedly connected to the inner wall of the enclosure 12, the lower wall of the transverse partition 4 is fixedly connected to the upper wall of the bottom plate 11, both ends of the longitudinal partition 5 are fixedly connected to the inner wall of the enclosure 12, and the lower wall of the longitudinal partition 5 is fixedly connected to the upper wall of the bottom plate 11; the enclosure 12 is provided with two groups of opposite side walls, one group of opposite side walls is fixedly connected to the transverse partition 4, the transverse partition 4 is perpendicular to the side wall of the enclosure 12 connected thereto, and the other group of opposite side walls of the enclosure 12 is fixedly connected to the longitudinal partition The transverse partition 4 and the longitudinal partition 5 are perpendicular to the side wall of the surrounding frame 12 connected to them; the transverse partition 4 and the longitudinal partition 5 are both perpendicular to the bottom plate 11; in the present embodiment, one transverse partition 4 and one longitudinal partition 5 are each provided, and in other embodiments of the present invention, it can also be: one transverse partition 4 is provided, and multiple longitudinal partitions 5 are provided, and the longitudinal partitions 5 are spaced apart along the length direction of the transverse partition 4; or, one longitudinal partition 5 is provided, and multiple transverse partitions 4 are provided, and multiple transverse partitions 4 are spaced apart along the length direction of the longitudinal partition 5; or, multiple transverse partitions 4 and multiple longitudinal partitions 5 are both provided, and multiple transverse partitions 4 and multiple longitudinal partitions 5 are vertically staggered.

[0028] A first arc surface 6 is provided at the intersection of the transverse partition 4 and the longitudinal partition 5, and the first arc surface 6 is tangent to the side wall of the transverse partition 4 and the side wall of the longitudinal partition 5; a second arc surface 7 is provided at the connection between the transverse partition 4 and the inner wall of the frame 12, and the second arc surface 7 is tangent to the side wall of the transverse partition 4 and the inner wall of the frame 12; a second arc surface 7 is also provided at the connection between the longitudinal partition 5 and the inner wall of the frame 12, and the second arc surface 7 is tangent to the side wall of the longitudinal partition 5 and the inner wall of the frame 12.

[0029] The upper ends of the transverse partition 4 and the longitudinal partition 5 are flush, and the upper ends of the transverse partition 4 and the longitudinal partition 5 are lower than the bottom of the notch 3; the height of the transverse partition 4 and the longitudinal partition 5 is 95 cm.

[0030] A third arc surface 8 is provided between adjacent inner walls of the enclosure 12 , and the third arc surface 8 is tangent to the inner walls of the adjacent enclosures 12 on both sides.

[0031] The outer wall of the frame 12 is fixedly connected to the boss 2, and the boss 2 includes a first bending portion 21 and a second bending portion 22. The first bending portion 21 is integrally connected to the second bending portion 22, and the first bending portion 21 is perpendicular to the second bending portion 22. A boss 2 is connected between adjacent outer walls of the frame 12, and the first bending portion 21 and the second bending portion 22 of the same boss 2 are respectively fixedly connected to the adjacent outer walls of the frame 12; the upper end of the boss 2 connected to the same frame 12 is flush, and the lower end of the boss 2 is a certain distance from the lower wall of the bottom plate 11, preferably 4 cm; the dimensions of the boss 2 are: the length of the first bending portion 21 and the second bending portion 22 are both 40 cm, the height is both 40 cm, and the thickness is both 5 cm.

[0032] A second guide channel is formed between the first bent portion 21 and the second bent portion 22 provided on the side wall of one side of the surrounding frame 12, and the gap between two adjacent sagger bodies 1 in the horizontal direction is 10 cm.

[0033] The utility model provides a graphite sagger for sintering positive electrode materials according to the working principle: required heating materials are placed in independent small accommodating cavities inside multiple sagger bodies 1, so that the materials are lower than the bottom of the notch 3, and then multiple sagger bodies 1 filled with materials are placed in the vertical direction and the horizontal direction, two adjacent sagger bodies 1 in the vertical direction are separated by a first guide channel, and two adjacent sagger bodies 1 in the horizontal direction are separated by a second guide channel, and then enter the sintering furnace for sintering.

[0034] A partition assembly is provided to increase the contact area between the material and the sagger body 1, and the thermal conductivity is enhanced to make heating and heat dissipation faster. The amount of material required to be heated in the same area is reduced, so that the uniformity of material heating is better. At the same time, the cross-arrangement of the transverse partition 4 and the longitudinal partition 5 also plays a role in enhancing the strength of the sagger body 1 itself; a first guide channel and a second guide channel are provided, and air flow channels are formed between the sagger bodies 1 distributed vertically and horizontally in the sintering furnace to accelerate the heat dissipation of the material; a first arc surface 6 is provided between the transverse partition 4 and the longitudinal partition 5, a second arc surface 7 is provided between the transverse partition 4, the longitudinal partition 5 and the side wall of the surrounding frame 12, and a third arc surface 8 is provided between two adjacent inner walls of the surrounding frame 12, all of which are for the convenience of dumping the material and avoiding the material from remaining inside the sagger body 1.

[0035] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A graphite sagger for sintering positive electrode materials, characterized in that: The invention comprises a sagger body, a partition assembly, a first flow guide channel and a second flow guide channel, wherein the partition assembly is arranged inside the sagger body, the first flow guide channel is arranged on the upper wall of the sagger body, and the second flow guide channel is arranged on the outer side wall of the sagger body; a notch is arranged on the upper wall of the sagger body, and the notch is the first flow guide channel; a plurality of bosses are fixedly connected to the side wall of the sagger body, and the second flow guide channel is formed between two adjacent bosses on the same side wall of the sagger body.

2. A graphite sagger for sintering positive electrode materials according to claim 1, characterized in that: The boss includes a first bending portion and a second bending portion that are integrally connected, the first bending portion and the second bending portion are perpendicular to each other, the first bending portion and the second bending portion are respectively fixedly connected to the side walls adjacent to the sagger body; the second guide channel is formed between the first bending portion and the second bending portion connected on the same side wall of the sagger body.

3. A graphite sagger for sintering positive electrode materials according to claim 2, characterized in that: The thickness of the first bending portion and the second bending portion are both half of the depth of the notch.

4. A graphite sagger for sintering positive electrode materials according to claim 1, characterized in that: The sagger body comprises a bottom plate and a surrounding frame, and the upper wall of the bottom plate is fixedly connected to the surrounding frame.

5. A graphite sagger for sintering positive electrode materials according to claim 4, characterized in that: The partition assembly includes a transverse partition and a longitudinal partition that are perpendicular to each other. Both ends of the transverse partition are fixedly connected to the inner wall of the frame. Both ends of the longitudinal partition are fixedly connected to the inner wall of the frame. Both the transverse partition and the longitudinal partition are fixedly connected to the upper wall of the bottom plate.

6. A graphite sagger for sintering positive electrode materials according to claim 5, characterized in that: A first arc surface is provided at the intersection of the transverse partition and the longitudinal partition.

7. A graphite sagger for sintering positive electrode materials according to claim 5, characterized in that: A second arc surface is provided between the transverse partition and the inner side wall of the surrounding frame, and a second arc surface is also provided between the longitudinal partition and the inner side wall of the surrounding frame.

8. The graphite sagger for sintering positive electrode materials according to claim 5, characterized in that: There are multiple transverse partitions, and / or there are multiple longitudinal partitions.

9. A graphite sagger for sintering positive electrode materials according to claim 4, characterized in that: A third arc surface is provided between two adjacent inner side walls of the surrounding frame.

10. The graphite sagger for sintering positive electrode materials according to claim 1, characterized in that: The upper end of the partition component is lower than the bottom of the notch.

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