Anode material drying equipment for powder dehydration

Abstract

The utility model relates to the technical field of lithium battery positive electrode material drying, in particular to positive electrode material drying equipment for powder dehydration, which comprises an air inflation chamber and a diffusion chamber, sealing gaskets are arranged at the joint of the bottom of the air inflation chamber and the top of the diffusion chamber, a breathable suspension plate is arranged between the two sealing gaskets, and the air inflation chamber is communicated with the diffusion chamber. A plurality of heating coils are installed at the bottom of the inner wall of the diffusion chamber, linings are jointly installed on the two sides of the inner walls of the portions, making contact with materials, of the inflation chamber and the diffusion chamber, an adjusting baffle is arranged on one side of the top of the inflation chamber, and the bottom of the adjusting baffle penetrates through the inflation chamber and extends into the diffusion chamber. The diffusion chamber, the hexagon head bolt, the hexagon nut, the flat washer, the sealing gasket, the breathable suspension plate, the inflation chamber, the heating coil, the adjusting baffle, the lining and the sealing ring are used in cooperation, so that the heat utilization efficiency of the drying equipment is improved, and the drying time of ternary materials is effectively shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of drying positive electrode materials for lithium batteries, in particular to positive electrode material drying equipment for dehydrating powder. Background Art

[0002] Nickel-cobalt-manganese ternary materials are lithium battery cathode materials developed in recent years. They have the advantages of high energy density, good cycle performance, fast charge and discharge performance, and high and low temperature resistance. They are widely used in electric vehicles and other fields. Ternary materials are customized intermediates, and every link in the production process has strict requirements. Among them, the drying method has a certain influence on the morphology, tap density, specific surface area and particle size distribution of the ternary precursor. At present, the equipment used for drying ternary materials mainly includes three types: ovens, disk dryers and rotary kilns. Ovens have low thermal efficiency, long drying time, high energy consumption and high investment costs. Disk dryers and rotary kilns have a certain influence on the morphology and tap density of ternary materials. Enhanced diffusion drying equipment is designed to solve the problems of low thermal efficiency of traditional drying equipment and the destruction of the appearance of ternary materials during the drying process. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a positive electrode material drying device for dehydrating powder.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A positive electrode material drying device for dehydrating powder comprises an inflation chamber and a diffusion chamber, wherein a sealing gasket is arranged at the connection between the bottom of the inflation chamber and the top of the diffusion chamber, a breathable suspension plate is arranged between the two sealing gaskets, a plurality of heating coils are installed at the bottom of the inner wall of the diffusion chamber, linings are installed on both sides of the inner wall of the inflation chamber and the diffusion chamber that are in contact with materials, an adjusting baffle is arranged on one side of the top of the inflation chamber, and the bottom of the adjusting baffle passes through the inflation chamber and extends to the interior of the diffusion chamber.

[0006] Preferably, the air-permeable suspension plate is located on top of the heating coil, and the air-filled chamber covers the top of the diffusion chamber.

[0007] Preferably, a plurality of hexagonal bolts are arranged on the top of the inflation chamber, and the bottoms of the hexagonal bolts pass through the inflation chamber, the sealing gasket and the diffusion chamber in sequence from top to bottom.

[0008] Preferably, a hexagonal nut is threadedly sleeved on the bottom of the outer wall of the hexagonal head bolt, a flat washer is sleeved on the top of the outer wall of the hexagonal head bolt, the bottom of the flat washer is placed on the top of the inflation chamber, and a number of through holes are penetrated through the inflation chamber and the diffusion chamber for use with the hexagonal head bolt.

[0009] Preferably, the outer sleeve of the regulating baffle is provided with a sealing ring, the sealing ring is embedded in the inflation chamber, and a plurality of inflation ports are installed on the top of the inflation chamber.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model improves the heat utilization efficiency of the drying equipment and effectively reduces the drying time of the ternary material without damaging the appearance characteristics of the drying equipment through the coordinated use of a diffusion chamber, a hexagonal bolt, a hexagonal nut, a flat washer, a sealing pad, a breathable suspension plate, an inflation chamber, a heating coil, an adjustment baffle, an inner liner and a sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the axonometric drawing of the structure of the utility model;

[0013] Figure 2 This is a top view of the heating coil of the utility model;

[0014] Figure 3 This is a schematic diagram of the lining structure of the utility model;

[0015] Figure 4 For this utility model Figure 1 A magnified view of middle;

[0016] Figure 5 For this utility model Figure 1 Enlarged view of middle B;

[0017] Figure 6 This is a schematic diagram of the sealing ring structure of the utility model.

[0018] In the figure: 1. inflation chamber; 2. hexagonal head bolt; 3. hexagonal nut; 4. flat washer; 5. sealing gasket; 6. breathable suspension plate; 7. diffusion chamber; 8. heating coil; 9. adjustment baffle; 10. lining; 11. sealing ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See also Figure 1-Figure 6A positive electrode material drying device for powder dehydration includes an air filling chamber 1 and a diffusion chamber 7. A sealing gasket 5 is provided at the connection between the bottom of the air filling chamber 1 and the top of the diffusion chamber 7. A breathable suspension plate 6 is provided between the two sealing gaskets 5. The breathable suspension plate 6 is made of a PTFE sintered plate with an air permeability of up to 12m3 / (h.Kpa.m2), a compressive strength of 0.5MPa, and a temperature resistance of 180°C, which meets the requirements of the heat resistance, pressure resistance and porosity of the dryer; a plurality of heating coils 8 are installed at the bottom of the inner wall of the diffusion chamber 7. Through the arrangement of the heating coils 8, the flow rate and temperature of each group of steam can be separately controlled according to the production situation. The temperature of the pre-drying and drying sections is precisely controlled; the inner walls of the gas chamber 1 and the diffusion chamber 7 in contact with the materials are both provided with linings 10; an adjusting baffle 9 is provided on one side of the top of the gas chamber 1, and the bottom of the adjusting baffle 9 passes through the gas chamber 1 and extends to the inside of the diffusion chamber 7; by adjusting the baffle 9, the residence time of the material in the dryer can be adjusted according to the change of the moisture content of the incoming material to ensure that the material meets the drying requirements; the inside of the dryer and the material contact part are all PTFE lined to avoid metal ion contamination of the material; the construction of the lining 10 adopts thermal spraying and overall heating treatment methods to ensure the adhesion strength of the lining 10.

[0021] As a technical optimization scheme of the utility model, the breathable suspension plate 6 is located on the top of the heating coil 8, and the inflation chamber 1 covers the top of the diffusion chamber 7; the diffusion chamber 7 is the main area for material drying, providing sufficient moisture diffusion and transportation space, the lower part of the diffusion chamber 7 is the material suspension heat exchange area, and the upper part is the air-water diffusion and transportation area. The shell of the diffusion chamber 7 is stamped in one piece, with sharp corners and arc transitions, which is convenient for the construction of the lining 10.

[0022] As a technical optimization solution of the utility model, a plurality of hexagonal bolts 2 are arranged on the top of the inflation chamber 1, and the bottom of the hexagonal bolts 2 passes through the inflation chamber 1, the sealing gasket 5 and the diffusion chamber 7 from top to bottom in sequence.

[0023] As a technical optimization solution of the utility model, a hexagonal nut 3 is provided on the bottom thread sleeve of the outer wall of the hexagonal head bolt 2, and a flat washer 4 is provided on the top of the outer wall of the hexagonal head bolt 2. The bottom of the flat washer 4 is placed on the top of the inflation chamber 1, and a number of through holes are opened through the inflation chamber 1 and the diffusion chamber 7 for use with the hexagonal head bolt 2.

[0024] As a technical optimization solution of the utility model, the outer sleeve of the adjusting baffle 9 is provided with a sealing ring 11, and the sealing ring 11 is embedded in the inflation chamber 1. A plurality of inflation ports are installed on the top of the inflation chamber 1. The air intake method of the inflation chamber 1 adopts multi-point air intake to accurately control the pressure of various parts of the inflation chamber 1, thereby ensuring that the pressure difference between the inflation chamber 1 and various parts of the diffusion chamber 7 is basically the same.

[0025] The present application is divided into two stages: pre-drying and drying. The pre-drying is carried out at a relatively low temperature (60-80°C) with uniform drying speed to dry the material to a moisture content of about 10%. The drying stage is carried out at a relatively high temperature (150°C) to dry the material to a moisture content of less than 0.5%, which not only meets the drying requirements but also ensures that the outer surface morphology of the ternary material is not destroyed.

[0026] When the utility model is used, the drying equipment is first placed at an angle, the positive electrode material is put into the drying equipment, and the heating coil 8 is started to reach the set drying temperature. Under the action of hot air, the positive electrode material is dried efficiently and evenly, and slides down along the specially treated lining 10 that is tilted at a certain angle. During the drying process, the external control system monitors and adjusts various parameters in real time to ensure the stability and safety of the drying process. After drying, open the adjusting baffle 9, and the dried material is discharged from the discharge port. At the same time, the drying equipment is not easily deformed. Furthermore, the present application does not require additional transmission devices. The positive electrode material is dried and slides in the drying equipment tilted at a certain angle, and is blocked by the adjusting baffle 9. The adjusting baffle 9 is opened to collect the dried material. The structure is simple and easy to operate, avoiding subsequent maintenance of the transmission device.

[0027] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A positive electrode material drying device for dehydrating powder, comprising an air filling chamber (1) and a diffusion chamber (7), characterized in that: A sealing gasket (5) is provided at the connection between the bottom of the inflation chamber (1) and the top of the diffusion chamber (7); a breathable suspension plate (6) is provided between the two sealing gaskets (5); a plurality of heating coils (8) are installed at the bottom of the inner wall of the diffusion chamber (7); inner liners (10) are installed on both sides of the inner walls of the inflation chamber (1) and the diffusion chamber (7) in contact with the material; an adjustment baffle (9) is provided on one side of the top of the inflation chamber (1); the bottom of the adjustment baffle (9) passes through the inflation chamber (1) and extends to the interior of the diffusion chamber (7).

2. The positive electrode material drying device for dehydrating powder according to claim 1, characterized in that: The air-permeable suspension plate (6) is located on the top of the heating coil (8), and the air-filled chamber (1) covers the top of the diffusion chamber (7).

3. The positive electrode material drying device for powder dehydration according to claim 1, characterized in that: A plurality of hexagonal bolts (2) are arranged on the top of the inflation chamber (1), and the bottoms of the hexagonal bolts (2) pass through the inflation chamber (1), the sealing gasket (5) and the diffusion chamber (7) in sequence from top to bottom.

4. The positive electrode material drying device for powder dehydration according to claim 3, characterized in that: A hexagonal nut (3) is threadedly sleeved on the bottom of the outer wall of the hexagonal head bolt (2), a flat washer (4) is sleeved on the top of the outer wall of the hexagonal head bolt (2), the bottom of the flat washer (4) is placed on the top of the inflation chamber (1), and a plurality of through holes for use with the hexagonal head bolt (2) are penetrated through the inflation chamber (1) and the diffusion chamber (7).

5. The positive electrode material drying device for powder dehydration according to claim 1, characterized in that: The outer sleeve of the regulating baffle (9) is provided with a sealing ring (11), and the sealing ring (11) is embedded in the inflation chamber (1). The top of the inflation chamber (1) is provided with a plurality of inflation ports.

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