Powder drying device

Abstract

The utility model provides a powder drying device which comprises a box body with a box door, an inner container is arranged in the box body, a hot air backflow channel is formed between the outer side of the inner container and the inner wall of the box body, the powder drying device further comprises a heating source and a fan, an air inlet of the box body is arranged close to the heating source, and the box body is further provided with an air outlet. The fan is used for enabling hot air heated by a heating source to continuously penetrate through the inner container and flow back to the heating source through the hot air backflow channel, a container containing powder is placed in the inner container and provided with a cover plate, the cover plate is provided with a plurality of air holes, and the diameter of each air hole is 1 / 3-1 / 2 of the particle size of the powder. According to the cover plate with the built-in container, the aperture of the air holes is 1 / 3-1 / 2 of the particle size of the powder, so that the powder can be prevented from penetrating through the cover plate in the baking process, the powder is prevented from overflowing out of the container from the interior of the container, and the problem that the powder in the container irregularly drifts away when a traditional container is put into a baking box body to be baked is solved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of lithium batteries, and more specifically relates to a powder drying device. Background Art

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as positive / negative electrode materials and a non-aqueous electrolyte solution. They have advantages such as high energy density, long cycle life, and low self-discharge rate. Domestic lithium battery technology is mainly used in the new energy vehicle industry and the energy storage industry. Common positive electrode materials for lithium-ion batteries include lithium cobalt oxide, lithium manganese oxide, and lithium iron phosphate, and common negative electrode materials include graphite and silicon-based materials. These materials are mostly in powder form, and before they can be used as lithium battery materials, they need to be dried to improve the safety performance of lithium batteries. Common types of drying equipment for these powdered materials include fluidized bed dryers, vacuum dryers, spray dryers, etc. Among them, when using a vacuum dryer to dry powder, because the container holding the powdered material is open or not well sealed, the powder will scatter irregularly during the drying process, scattering into the drying equipment, affecting the drying equipment and also resulting in waste of powdered material.

[0003] In view of this, there is an urgent need to provide a powder drying device to solve the problem. Utility Model Content

[0004] In order to at least solve one or more technical problems in the above-mentioned background technology, the present invention proposes a powder drying device.

[0005] To this end, the present invention provides the following technical solutions.

[0006] The utility model discloses a powder drying device, comprising: a box body with a box door, an inner liner is arranged in the box body, a hot air reflux channel is formed between the outer side of the inner liner and the inner wall of the box body, and a heat source and a fan. The air inlet of the box body is arranged close to the heat source, and the box body also has an air outlet. The fan is used to continuously pass the hot air heated by the heat source through the inner liner and return it to the heat source through the hot air reflux channel. The interior of the inner liner is used to place a container containing powder, and the container has a cover plate. The cover plate has a plurality of air holes, and the aperture of each air hole is 1 / 3 to 1 / 2 of the particle size of the powder.

[0007] Preferably, the cover plate includes a titanium rod sintered filter element.

[0008] Preferably, the inner liner is located in the middle of the box body and is arranged close to the box door, and the opening of the inner liner faces the box door so that when the box door is closed, the inner liner forms an independent area in the box body for placing the container.

[0009] Preferably, the inner liner includes a plurality of partitions, each of which extends from the bottom of the box to the top of the box to form an area for placing the container, and two partitions adjacent to the opening of the inner liner have grilles for ventilation to allow hot air to pass through the grilles and through the inner liner.

[0010] Preferably, the heat source is located inside the box and is arranged as a grille close to the opening of the inner tank.

[0011] Preferably, the container is placed stationarily inside the inner container.

[0012] Preferably, a cavity is provided in the center of the container to increase the contact area between the outer surface of the container and the hot air.

[0013] Preferably, the container is rotatably arranged on the inner side of the inner container.

[0014] Preferably, a driving motor is further included, the output end of the driving motor is used to pass through the outer shell of the box body and connect to the bottom of the container, and the sealing method between the output end of the driving motor and the box body is magnetic fluid sealing.

[0015] The technical solution provided by this application may have the following beneficial effects:

[0016] By utilizing the device described in the above and multiple schemes of the present invention, that is, the present invention can place a container in an inner container located inside a baking oven, and provide a cover for the container to prevent the powder to be dried from penetrating the container and overflowing into the oven. By utilizing a heat source and a fan, the gas entering at the air inlet is heated, and the heated gas continuously passes through the inner container and then returns to the heat source through a hot air return channel. The aperture of the air vents in the cover is 1 / 3 to 1 / 2 of the powder particle size to prevent the powder from penetrating the cover and avoiding the powder from overflowing from inside and outside the container. This solves the problem of irregular dispersion of powder in a traditional container when the container is placed in a baking oven for baking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0018] Figure 1 1 is a front view showing an embodiment of the present utility model;

[0019] Figure 2 1 is a top view showing an embodiment of the present utility model;

[0020] Figure 3 It is a left side view showing an embodiment of the utility model;

[0021] Figure 4 1 is a schematic diagram showing the container structure of an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram showing a rotatable container arrangement according to an embodiment of the present invention;

[0023] Explanation of the accompanying reference numerals: 11, door; 12, box body; 13, liner; 14, heat source; 15, fan; 16, container; 17, cover; 41, grille; 71, cavity; 91, drive motor. DETAILED DESCRIPTION

[0024] The embodiments will now be described with reference to the accompanying drawings. It should be understood that for simplicity and clarity of explanation, reference numerals may be repeated in the accompanying drawings to indicate corresponding or similar elements, where deemed appropriate. In addition, the present invention sets forth many specific details in order to provide a thorough understanding of the embodiments described herein. However, one of ordinary skill in the art will understand that the embodiments described herein may be practiced without these specific details. In other cases, well-known methods, processes, and components are not described in detail so as not to obscure the embodiments described herein. Moreover, this description should not be construed as limiting the scope of the embodiments described herein.

[0025] like Figures 1 to 5 As shown, a powder drying device is provided, comprising: a box body 12 with a box door 11, an inner liner 13 is provided in the box body 12, a hot air reflux channel is formed between the outer side of the inner liner 13 and the inner wall of the box body 12, and also comprising a heat source 14 and a fan 15, the air inlet of the box body 12 is arranged close to the heat source 14, the box body 12 also has an air outlet, the fan 15 is used to continuously pass the hot air heated by the heat source 14 through the inner liner 13 and return it to the heat source 14 through the hot air reflux channel, the interior of the inner liner 13 is used to place a container 16 containing powder, the container 16 has a cover plate 17, the cover plate 17 has a plurality of air holes, and the aperture of each air hole is 1 / 3~1 / 2 of the powder particle size.

[0026] In one embodiment, the pore size of the air vents of the cover plate 17 is the same as the particle size of the powder, and a titanium rod sintered filter element can be provided in the cover plate 17 to prevent the powder particles from overflowing to the outside of the container 16 .

[0027] The titanium rod sintered filter element mentioned above can be purchased from Shijiazhuang Qianhuang Filtration Equipment Co., Ltd. Titanium rod sintered filter element is an existing technology and will not be described in detail here.

[0028] In one embodiment, the inner liner 13 is located in the middle of the box body 12 and is arranged close to the box door 11. The opening of the inner liner 13 faces the box door 11 so that when the box door 11 is closed, the inner liner 13 forms an independent area in the box body 12 for placing the container 16.

[0029] It is easy to understand that when the door 11 is open, the inner liner 13 is not closed, and the container 16 containing powder can be placed in the inner liner 13; when the door 11 is closed, the inner liner 13 is closed so that the container 16 is placed in a relatively independent baking area.

[0030] In the above embodiment, the structural design of the inner liner 13 can adopt the following scheme. Specifically, the inner liner 13 includes multiple partitions, for example, three partitions, each of which extends from the bottom of the box body 12 to the top of the box body 12 to form an area for placing the container 16. The two partitions adjacent to the opening of the inner liner 13 have grilles 41 for ventilation, so as to allow hot air to pass through the grilles 41 and pass through the inner liner 13. The remaining partition does not have a grille 41 because it does not need to be ventilated. Figure 2 As shown, two opposite partitions among the three partitions are used for air inlet and air outlet respectively.

[0031] In one embodiment, the heat source 14 is located inside the housing 12 and near the grille 41 at the opening of the inner container 13. This arrangement has the advantage that after the heat source 14 heats the gas entering the housing 12, the hot gas can quickly pass through the grille 41 of the inner container 13 and enter the inner container 13, thereby baking and heating the container 16 placed in the inner container 13.

[0032] In other embodiments, the container 16 can be placed statically inside the inner liner 13 .

[0033] Furthermore, in the above embodiment, a cavity 71 is provided at the center of the container 16 to increase the contact area between the outer surface of the container 16 and the hot air.

[0034] In some other embodiments, the container 16 is rotatably disposed inside the inner liner 13 .

[0035] In the above embodiment, the container 16 can be rotatably arranged relative to the housing 12 in the following manner. Specifically, a drive motor 91 can be provided, wherein the output end of the drive motor 91 is configured to pass through the outer shell of the housing 12 and connect to the bottom of the container 16. The seal between the output end of the drive motor 91 and the housing 12 is a magnetic fluid seal. The magnetic fluid seal has the advantages of zero leakage and low friction. By driving the container 16 to rotate by the drive motor 91, the contact area between the powder and the container 16 can be improved, thereby increasing heat transfer to the powder and further improving heating efficiency.

[0036] In one embodiment, the air outlet is located on a side opposite to the air inlet. Placing the air outlet on a side opposite to the air inlet, i.e., farther away from the air inlet, can ensure that as much hot air as possible flows in the hot air return channel, thereby reducing heat loss.

[0037] It should be understood that the terms "first" or "second" and the like in the claims, specifications, and drawings disclosed herein are used to distinguish between different objects, rather than to describe a specific order. The terms "include" and "comprising" used in the specifications and claims disclosed herein indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0038] It should also be understood that the terminology used in this disclosure is for the purpose of describing specific embodiments only and is not intended to limit the disclosure. As used in this disclosure and the claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" as used in this disclosure and the claims refers to any and all possible combinations of one or more of the associated listed items, including and including these combinations.

[0039] Although the embodiments of the present invention are as described above, the above contents are merely examples for facilitating understanding of the present invention and are not intended to limit the scope and application scenarios of the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention. However, the scope of patent protection of the present invention shall still be based on the scope defined by the attached claims.

Claims

1. A powder drying device, characterized in that: include: A box body (12) having a box door (11), an inner liner (13) is provided in the box body (12), a hot air return channel is formed between the outer side of the inner liner (13) and the inner wall of the box body (12), and further comprising a heat source (14) and a fan (15), an air inlet of the box body (12) is arranged close to the heat source (14), the box body (12) also has an air outlet, the fan (15) is used to continuously pass the hot air heated by the heat source (14) through the inner liner (13) and return it to the heat source (14) through the hot air return channel, the interior of the inner liner (13) is used to place a container (16) containing powder, the container (16) has a cover plate (17), the cover plate (17) has a plurality of air holes, and the aperture of each air hole is 1 / 3 to 1 / 2 of the particle size of the powder.

2. A powder drying device according to claim 1, characterized in that: The cover plate (17) includes a titanium rod sintered filter element.

3. The powder drying device according to claim 1, characterized in that: The inner liner (13) is located in the middle of the box body (12) and is arranged close to the box door (11). The opening of the inner liner (13) faces the box door (11) so that when the box door (11) is closed, the inner liner (13) forms an independent area in the box body (12) for placing the container (16).

4. A powder drying device according to claim 3, characterized in that: The inner container (13) includes a plurality of partitions, each of which extends from the bottom of the box body (12) to the top of the box body (12) to form an area for placing the container (16), and two partitions adjacent to the opening of the inner container (13) have grilles (41) for ventilation, so as to allow hot air to pass through the grilles (41) and pass through the inner container (13).

5. The powder drying device according to claim 4, characterized in that: The heat source (14) is located inside the box (12) and is arranged on a grille (41) close to the opening of the inner container (13).

6. The powder drying device according to claim 4, characterized in that: The container (16) is placed statically inside the inner container (13).

7. A powder drying device according to claim 6, characterized in that: A cavity (71) is provided at the center of the container (16) to increase the contact area between the outer surface of the container (16) and the hot air.

8. The powder drying device according to claim 4, characterized in that: The container (16) is rotatably arranged on the inner side of the inner container (13).

9. The powder drying device according to claim 8, characterized in that: It also includes a drive motor (91), the output end of the drive motor (91) is used to pass through the outer shell of the box body (12) and connect to the bottom of the container (16), and the sealing method between the output end of the drive motor (91) and the box body (12) is a magnetic fluid seal.

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