Air suspension ultrasonic atomization spraying equipment for pre-sodium modification of negative electrode material

Abstract

The utility model provides air suspension ultrasonic atomization spraying equipment for pre-sodium modification of a negative electrode material, relates to the technical field of spraying equipment, and solves the problems that an existing spraying sodium supplementing device is limited in spraying range, and liquid dispersity of a single spray head is poor; and spraying and drying operations are difficult to complete. The spraying area comprises a spraying device, a first sliding rail and a second sliding rail, wherein the first sliding rail and the second sliding rail are used for moving the spraying device, and the spraying device comprises a liquid conveying opening used for inputting spraying reagents and an ultrasonic end used for ultrasonically atomizing the reagents. According to the utility model, a fine atomized reagent can be generated, and the uniformity in the spraying process can be improved, so that the pre-sodium modification quality of a negative electrode material is improved; and due to the design of the waste heat treatment device, the waste heat treatment device comprises a tail gas discharge pipe, a heat exchange device and a waste gas chamber, heat for drying tail gas can be recycled, the energy utilization efficiency is improved, and the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to spraying equipment technical field, specifically, relate to a kind of for negative material pre-sodiumization gas suspension ultrasonic atomization spraying equipment. BACKGROUND

[0002] With the global energy consumption mode gradually changes from fossil energy to new energy, the secondary battery industry with high energy density, long cycle life and low pollution develops rapidly, among them, lithium ion battery is favored because of its high energy density, high output power, small self-discharge and other advantages, but the lithium content in nature is limited, and sodium, which is in the same main group, not only has similar physical and chemical properties to lithium, but also has the characteristics of abundant reserves and low cost, and is gradually developing into one of the most potential energy storage battery types in the world.

[0003] In actual battery system, the sodium ions required in the battery cycle process are all provided by the positive electrode material, and the first cycle coulomb efficiency of the negative electrode is too low, which means that a large amount of active sodium ions are irreversibly consumed in the first cycle charging and discharging process, which reduces the reversible capacity of the battery and shortens the cycle life. In addition, many reported positive electrode materials are in a sodium-deficient state, which makes the active sodium content of the battery even more difficult to grasp, thereby causing its cycle performance to deteriorate. In order to improve the reversible cycle capacity and the first coulomb efficiency, people have developed a pre-sodiumization technology for sodium ion battery electrode materials. This technology can supplement the active material consumed by the formation of a solid-state interfacial film in the negative electrode reaction, thereby improving the reversible cycle capacity of the battery. The principle of pre-sodiumization technology is to pre-add extra active sodium in the negative electrode or positive electrode material to compensate for the irreversible capacity loss in the first cycle charging and discharging process, thereby achieving a substantial increase in the energy density and cycle life of the full battery. Among the many pre-sodiumization methods, chemical spraying is one of the commonly used pre-sodiumization methods. This method sprays a pre-sodiumization solution on the surface of the negative electrode sheet, and then performs drying and other treatments on the electrode sheet. At present, manual spraying and drying in a drying oven are mostly used, which is low in efficiency and difficult to produce continuously.

[0004] A method and device for cold spraying sodium supplement of negative electrode sheet and a sodium ion battery are disclosed in patent CN115799456A. The device includes an environmental cavity, a cold spraying device, an electrode sheet roll and a film roll. The cold spraying device, the electrode sheet roll and the film roll are all installed in a completely sealed and inert gas-filled environmental cavity. The operation is simple, and the pre-sodiumization can be continuous and efficient. The pre-sodium amount and depth are accurately adjustable, and the metallic sodium is uniformly distributed after pre-sodiumization.

[0005] However, the spraying equipment of the device is fixed and cannot be moved, and can only spray at a single position, with limited spraying range and poor liquid dispersibility of a single nozzle. It is difficult to complete the spraying and drying operation for objects with large volume or special shape that cannot be placed in the box. UTILITY MODEL CONTENT

[0006] The utility model discloses a kind of gas-suspended ultrasonic atomization spraying equipment for negative electrode material pre-sodium, to solve the technical problems that the spraying range of existing spraying sodium supplement device is limited, and single nozzle liquid dispersibility is poor;It is difficult to complete the spraying drying operation.

[0007] The embodiment of the utility model realizes by the following technical scheme:

[0008] A kind of gas-suspended ultrasonic atomization spraying equipment for negative electrode material pre-sodium, including conveying unit for conveying material, for spraying material spraying unit and for the drying of material after spraying drying unit, the spraying area includes spraying device and to move the first slide rail and second slide rail of the spraying device, the spraying device includes to input spraying reagent infusion port and to ultrasonic atomization reagent ultrasonic end.

[0009] Preferably, the drying unit includes a drying chamber connected to the spraying unit for drying the material, a heating device for heating air, and a uniform air distribution plate for uniformly distributing hot air.

[0010] Preferably, the drying unit further includes an air compressor for compressing and conveying heated air, and a conveying pipe connected between the uniform air distribution plate and the air compressor.

[0011] Preferably, it further includes a waste heat treatment device for recovering waste heat from the hot air in the drying chamber, the waste heat treatment device includes a tail gas discharge pipe for discharging drying tail gas, and a heat exchange device connected to the tail gas discharge pipe for recovering heat from the drying tail gas, and the heat exchange device is also connected to the heating device for transferring the recovered heat to the heated air.

[0012] Preferably, the heat exchange device further includes an air suction pipe for sucking in cold air, a waste gas chamber for collecting the tail gas after heat exchange, and an exhaust pipe connected to the waste gas chamber.

[0013] Preferably, the spraying device further includes a gas inlet for introducing gas, and a conical cavity for mixing the reagent and the gas, and the narrow end of the conical cavity is connected to a spraying port for spraying the atomized reagent.

[0014] Preferably, the spraying device is slidingly arranged on the first slide rail, and the first slide rail is slidingly arranged on the second slide rail, and the sliding directions of the two are perpendicular to each other.

[0015] Preferably, the conveying unit includes a porous track passing through the spraying unit and the drying unit, and a roller for driving the porous track.

[0016] Preferably, it further includes a machine frame for supporting the spraying unit.

[0017] By adopting the technical scheme, the ultrasonic atomization technology can generate fine atomized reagents, which helps to improve the uniformity in the spraying process, thereby improving the pre-sodium treatment quality of the negative electrode material. Through accurate control of the infusion port and the ultrasonic end, the amount of sprayed reagents can be accurately adjusted to ensure the consistency and repeatability of the pre-sodium treatment. The integrated conveying part, spraying part and drying part realize the automation of material conveying, spraying and drying, improving the production efficiency and operation convenience. The design of the drying part includes a drying chamber, a heating device and an air distribution plate, as well as an air compressor and a conveying pipeline, which helps to quickly and uniformly dry the sprayed material. The design of the waste heat treatment device includes a tail gas discharge pipe, a heat exchange device and a waste gas chamber, which can recover the heat of the drying tail gas, improve the energy utilization efficiency and reduce the energy consumption. Through effective recovery of the drying tail gas heat and waste gas treatment, energy waste and environmental pollution are reduced, meeting the requirements of green production. The mobile design of the spraying device, including the first sliding rail and the second sliding rail, and the support of the rack, helps the operator to safely perform the spraying operation. The design of the spraying device allows spraying in different directions, increasing the flexibility of the equipment and the adaptability to different shaped materials.

[0018] The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0019] 1. The ultrasonic atomization technology can generate fine atomized reagents, which helps to improve the uniformity in the spraying process, thereby improving the pre-sodium treatment quality of the negative electrode material.

[0020] 2. The utility model realizes the automation of material conveying, spraying and drying, improving the production efficiency and operation convenience.

[0021] 3. The utility model helps to quickly and uniformly dry the sprayed material. The design of the waste heat treatment device includes a tail gas discharge pipe, a heat exchange device and a waste gas chamber, which can recover the heat of the drying tail gas, improve the energy utilization efficiency and reduce the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment. It should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0023] Figure 1 A structure diagram of a gas suspension ultrasonic atomization spraying equipment for pre-sodium treatment of negative electrode material is provided for the embodiment 1 of the utility model.

[0024] Figure 2A structure schematic view of a spraying device of a gas suspension ultrasonic atomization spraying equipment for pre-sodium of negative electrode material is provided for the embodiment 1 of the present application;

[0025] Figure 3 A structure schematic view of a conveying pipeline of a gas suspension ultrasonic atomization spraying equipment for pre-sodium of negative electrode material is provided for the embodiment 2 of the present application;

[0026] Figure 4 A structure schematic view of a uniform air distribution plate of a gas suspension ultrasonic atomization spraying equipment for pre-sodium of negative electrode material is provided for the embodiment 2 of the present application;

[0027] Figure 5 A structure schematic view of a sliding track of a gas suspension ultrasonic atomization spraying equipment for pre-sodium of negative electrode material is provided for the embodiment 2 of the present application;

[0028] Figure 6 A structure schematic view of a porous track of a gas suspension ultrasonic atomization spraying equipment for pre-sodium of negative electrode material is provided for the embodiment 2 of the present application;

[0029] Icon: 1, gas inlet; 2, liquid inlet; 3, ultrasonic end; 4, conical cavity; 41, spraying port; 5, first sliding rail; 6, second sliding rail; 7, tail gas discharge pipe; 8, roller; 9, waste gas chamber; 11, air suction pipe; 12, heat exchange device; 13, heating device; 14, air compressor; 15, conveying pipeline; 16, drying chamber; 17, uniform air distribution plate; 18, porous track; 19, rack. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0033] In the description of the utility model, it needs to be explained that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the application when it is usually placed, it is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0034] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, if the terms "setting", "mounting", "connecting", "connecting" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or they can be detachably connected, or integrally connected; they can be mechanically connected, or they can be electrically connected; they can be directly connected, or they can be indirectly connected through an intermediate medium; they can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] Embodiment 1

[0036] A gas-suspended ultrasonic atomization spraying device for negative electrode material pre-sodiumization, comprising a conveying part for conveying materials, a spraying part for spraying materials, and a drying part for drying the sprayed materials, the spraying area comprises a spraying device and a first sliding rail 5 and a second sliding rail 6 for moving the spraying device, the spraying device comprises a liquid inlet 2 for inputting a spraying agent and an ultrasonic end 3 for ultrasonic atomization of the agent.

[0037] In this embodiment, the heat exchange device 12 further comprises an air suction pipe 11 for sucking cold air, a waste gas chamber 9 for collecting tail gas after heat exchange, and an exhaust pipe communicating with the waste gas chamber 9.

[0038] In this embodiment, the spraying device further comprises a gas inlet 1 for introducing gas and a conical cavity 4 for mixing the agent and the gas, and the narrow end of the conical cavity 4 is communicated with a spraying port 41 for spraying the atomized agent.

[0039] In this embodiment, the spraying device is slidingly arranged on the first sliding rail 5; the first sliding rail 5 is slidingly arranged on the second sliding rail 6, and the sliding directions of the two are perpendicular to each other.

[0040] In this embodiment, a rack 19 is further provided for supporting the spraying part.

[0041] Working principle and use method:

[0042] The ultrasonic atomization technology can produce fine atomized reagents, which helps to improve the uniformity in the spraying process and thus improve the quality of pre-sodiumization of the negative electrode material. Through precise control of the infusion port 2 and the ultrasonic end 3, the amount of sprayed reagents can be accurately adjusted to ensure the consistency and repeatability of the pre-sodiumization process. The integrated conveying part, spraying part and drying part realize the automation of material conveying, spraying and drying, improving the production efficiency and operation convenience. The design of the drying part includes a drying chamber 16, a heating device 13 and an air distribution plate 17, as well as an air compressor 14 and a conveying pipeline 15, which helps to quickly and evenly dry the sprayed materials. The design of the waste heat treatment device, including the tail gas discharge pipe 7, the heat exchange device 12 and the waste gas chamber 9, can recover the heat of the drying tail gas, improve the energy utilization efficiency and reduce energy consumption. Through effective recovery of the heat of the drying tail gas and waste gas treatment, energy waste and environmental pollution are reduced, meeting the requirements of green production. The mobile design of the spraying device, including the first sliding rail 5 and the second sliding rail 6, as well as the support of the rack 19, helps the operator to safely perform the spraying operation.

[0043] Embodiment 2

[0044] The difference between this embodiment and embodiment 1 is that in this embodiment, the drying part includes a drying chamber 16 connected to the spraying part for drying the materials, a heating device 13 for heating air, and an air distribution plate 17 for uniformly delivering hot air.

[0045] In this embodiment, the drying part further includes an air compressor 14 for compressing the conveying hot air and a conveying pipeline 15 connecting the air distribution plate 17 and the air compressor 14.

[0046] In this embodiment, a waste heat treatment device is further included for recovering the waste heat of the hot air in the drying chamber 16, which includes a tail gas discharge pipe 7 for discharging the drying tail gas and a heat exchange device 12 connected to the tail gas discharge pipe 7 for recovering the heat of the drying tail gas, and the heat exchange device 12 is also connected to the heating device 13 for transferring the recovered heat to the heating air.

[0047] In this embodiment, the conveying part includes a porous track 18 penetrating through the spraying part and the drying part, and a roller 8 for driving the porous track 18.

[0048] The above is only a preferred embodiment of the present utility model, and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An aerosolized ultrasonic atomized spray apparatus for pre-sodiation of negative electrode material, characterized by: The application relates to a material spraying device, which comprises a conveying part for conveying material, a spraying part for spraying material and a drying part for drying sprayed material, the spraying part comprises a spraying device and first and second sliding rails (5, 6) for moving the spraying device, the spraying device comprises a liquid inlet (2) for inputting spraying reagent and an ultrasonic end (3) for ultrasonic atomization of the reagent.

2. The gas suspended ultrasonic nebulized spray device for pre-sodiation of negative electrode material according to claim 1, characterized in that: The drying part comprises a drying chamber (16) connected with the spraying part for drying material, a heating device (13) for heating air and an air uniform outlet plate (17) for uniformly sending hot air.

3. The gas suspended ultrasonic nebulized spray apparatus for pre-sodiation of negative electrode material according to claim 2, characterized in that: The drying part further comprises an air compressor (14) for compressing air for heating and a conveying pipeline (15) connected with the air uniform outlet plate (17) and the air compressor (14).

4. The gas suspended ultrasonic nebulizer spray device for pre-sodiation of negative electrode material according to claim 3, characterized in that: The application further comprises a waste heat treatment device for recovering waste heat of hot air in the drying chamber (16), the waste heat treatment device comprises a tail gas discharge pipeline (7) for discharging drying tail gas and a heat exchange device (12) connected with the tail gas discharge pipeline (7) for recovering heat of the drying tail gas, the heat exchange device (12) is further connected with the heating device (13) for transferring recovered heat to the heating air.

5. The gas suspended ultrasonic nebulizer spray device for pre-sodiation of negative electrode material according to claim 4, characterized in that: The heat exchange device (12) further comprises an air suction pipeline (11) for sucking cold air, a waste gas chamber (9) for collecting tail gas after heat exchange and an exhaust pipeline connected with the waste gas chamber (9).

6. The gas suspended ultrasonic nebulized spray apparatus for pre-sodiation of negative electrode material according to any one of claims 1-5, characterized in that: The spraying device further comprises a gas inlet (1) for inputting gas and a conical cavity (4) for mixing the reagent and the gas, the narrow end of the conical cavity (4) is connected with a spraying port (41) for spraying atomized reagent.

7. The gas suspended ultrasonic nebulized spray apparatus for pre-sodiation of negative electrode material according to any one of claims 1-5, characterized in that: The spraying device is slidably arranged on the first sliding rail (5), the first sliding rail (5) is slidably arranged on the second sliding rail (6), and the sliding directions of the two are perpendicular to each other.

8. The gas suspended ultrasonic nebulized spray apparatus for pre-sodiation of negative electrode material according to any one of claims 1-5, characterized in that: The conveying part comprises a porous track (18) penetrating through the spraying part and the drying part and a roller (8) for driving the porous track (18).

9. The gas suspended ultrasonic nebulized spray apparatus for pre-sodiation of negative electrode material according to any one of claims 1-5, characterized in that: The application further comprises a machine frame (19) for supporting the spraying part.

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