An oven and drying equipment for lithium battery hot roll coating

Abstract

This utility model discloses an oven and drying equipment for hot roller coating of lithium batteries. Hot air is input into the air inlet chamber through an air inlet pipe, and the hot air is output from the bottom of the air inlet chamber through air nozzles facing the coating roller shaft, thereby enabling drying. Two side return air chambers are located on both sides of the coating roller shaft. Part of the hot air output from the air nozzles enters the side return air chambers through return air holes. The arrangement of the side return air chambers facilitates the diffusion of air from the middle of the air nozzles to both sides, improving the uniformity of hot air distribution at both ends and the middle of the coating roller shaft and the space utilization rate, thereby improving the drying effect and drying efficiency, and facilitating use. The warm air from the side return air chambers can enter the rear return air chamber and be recovered through the return air pipe. The recovered hot air can be recycled, which helps to reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery coating, specifically to an oven and drying equipment for hot roller coating of lithium batteries. Background Technology

[0002] Drying is a crucial step in the lithium battery coating process. Existing ovens employ simple hot air circulation systems, but due to their unreasonable structural design, the hot air distribution is uneven. This is especially true when used on large coating rollers, where the temperature at both ends of the rollers is significantly lower than in the middle, resulting in unsatisfactory drying performance. Furthermore, existing ovens have low space utilization, low drying efficiency, poor circulation, and high energy consumption. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides an oven and drying equipment for hot roller coating of lithium batteries, which can solve the problems of inconvenience in using existing ovens and high energy consumption.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: On the one hand, an oven for hot roller coating of lithium batteries is provided, including an air inlet cavity, a rear return air cavity and two side return air cavities. The top and bottom of the air inlet cavity are respectively connected to an air inlet pipe and an air nozzle. The rear return air cavity and the two side return air cavities are all connected to the side wall of the air inlet cavity, and the two side return air cavities are arranged opposite to each other and protrude downward from the air nozzle. The side walls of the side return air cavities facing the air nozzle are provided with return air holes. The rear return air cavity is connected to the two side return air cavities, and the rear return air cavity is connected to a return air pipe.

[0005] As a further improvement to the above technical solution, two first sealing plates are provided at the bottom of the air inlet cavity near the air nozzle. The two first sealing plates protrude downward from the air inlet cavity, and the arrangement direction of the two first sealing plates is perpendicular to the arrangement direction of the two side return air cavities. A second sealing plate is surrounded by the side wall edge of the side return air cavity facing the air nozzle, and the second sealing plate protrudes from the side return air cavity in the direction of the air nozzle.

[0006] As a further improvement to the above technical solution, lifting rings are provided at the top of the side return air cavity and the top of the rear return air cavity, and mounting components are provided at the top and bottom of the rear return air cavity.

[0007] As a further improvement to the above technical solution, the mounting component includes two arms, which are connected at a right angle, and one of the arms is connected to the rear return air cavity.

[0008] As a further improvement to the above technical solution, a perforated plate is provided inside the air inlet cavity, and the perforated plate faces the air inlet pipe.

[0009] As a further improvement to the above technical solution, the perforated plate is inclined; a plurality of air nozzles are provided, and the plurality of air nozzles are arranged in a diagonal line, the inclination angle of the diagonal line being the same as the inclination angle of the perforated plate.

[0010] As a further improvement to the above technical solution, an explosion-proof door is also provided at the top of the air inlet cavity.

[0011] As a further improvement to the above technical solution, the sidewalls of the air inlet cavity, the sidewalls of the side return air cavity, and the sidewalls of the rear return air cavity are all configured as double-layer structures.

[0012] On the other hand, a drying device is provided, including a hot air blower, a recycling device, and the aforementioned oven for hot roller coating of lithium batteries. The hot air blower is connected to the air inlet pipe through a pipe, and the recycling device is connected to the air return pipe through a pipe. The hot air blower is used to input hot air into the air inlet cavity, and the recycling device is used to recover the air inside the air return cavity.

[0013] As a further improvement to the above technical solution, a bracket is also provided on the top of the air inlet cavity, and a groove is provided on the bracket, and the pipe is placed in the groove.

[0014] The beneficial effects of this invention are as follows: Hot air is input into the air inlet cavity through the air inlet pipe, and the hot air is output from the bottom of the air inlet cavity through the air nozzle, which faces the coating roller shaft, thus enabling drying. Two side return air cavities are located on both sides of the coating roller shaft. Part of the hot air output from the air nozzle enters the side return air cavities through the return air holes. The design of the side return air cavities facilitates the diffusion of airflow from the center of the air nozzle to both sides, improving the uniformity of hot air distribution at both ends and the middle of the coating roller shaft, as well as space utilization, thereby improving the drying effect and efficiency, and facilitating use. The warm air from the side return air cavities can enter the rear return air cavity and be recovered through the return air pipe. The recovered hot air can be recycled, which helps reduce energy consumption. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of an oven for hot roller coating of lithium batteries provided in a preferred embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the oven for hot roller coating of lithium batteries from another angle, provided by a preferred embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of an oven for hot roller coating of lithium batteries provided in a preferred embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional view from another angle of the oven for hot roller coating of lithium batteries provided in a preferred embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of an oven for hot roller coating of lithium batteries, provided by a preferred embodiment of the present invention, mounted on a coating roller shaft.

[0021] Reference numerals: 1. Air inlet chamber; 2. Rear return air chamber; 3. Side return air chamber; 4. Coating roller shaft.

[0022] 11. Air inlet duct, 12. Air nozzle, 13. First sealing plate, 14. Mesh plate, 15. Explosion-proof door, 16. Bracket, 21. Return air duct, 22. Mounting parts, 31. Return air hole, 32. Second sealing plate, 33. Lifting ring;

[0023] 161. Groove; 221. Support arm; 222. Connecting hole. Detailed Implementation

[0024] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0025] Please see Figure 1-2 The preferred embodiment of this utility model provides an oven for hot roller coating of lithium batteries, including an air inlet chamber 1, a rear return air chamber 2 and two side return air chambers 3. Hot air is first input through the air inlet chamber 1, then enters the two side return air chambers 3, and finally enters the rear return air chamber 2.

[0026] For details, please see Figure 1 , 25. The top and bottom of the air inlet chamber 1 are respectively connected to the air inlet pipe 11 and the air nozzle 12. The rear return air chamber 2 and the two side return air chambers 3 are all connected to the side wall of the air inlet chamber 1. The two side return air chambers 3 are arranged opposite each other and protrude downward from the air nozzle 12. The side walls of the side return air chambers 3 facing the air nozzle 12 are provided with return air holes 31. The rear return air chamber 2 is connected to the two side return air chambers 3 and is connected to the return air pipe 21. Hot air is input into the air inlet chamber 1 through the air inlet pipe 11. The hot air is output from the bottom of the air inlet chamber 1 through the air nozzle 12. The air nozzle 12 faces the coating roller shaft 4, thereby drying the copper foil on the coating roller shaft 4. Two side return air chambers 3 are located on both sides of the coating roller shaft 4. A portion of the hot air output from the nozzles 12 enters the side return air chambers 3 through the return air holes 31. The arrangement of the side return air chambers 3 facilitates the diffusion of airflow from the center of the nozzles 12 to both sides, improving the uniformity of hot air distribution at both ends and the middle of the coating roller shaft 4, as well as space utilization, thereby enhancing the drying effect and efficiency, and facilitating use. The warm air from the side return air chambers 3 can enter the rear return air chamber 2 and then be recovered through the return air pipe 21. The recovered hot air can be recycled, which helps reduce energy consumption.

[0027] Two first sealing plates 13 are provided at the bottom of the air inlet cavity 1 near the air nozzle 12. The two first sealing plates 13 protrude downward from the air inlet cavity 1, and their arrangement direction is perpendicular to the arrangement direction of the two side return air cavities 3. A second sealing plate 32 is surrounded by the side wall edge of the side return air cavity 3 facing the air nozzle 12, and the second sealing plate 32 protrudes from the side return air cavity 3 towards the air nozzle 12. During drying, both the first sealing plate 13 and the second sealing plate 32 abut against the coating roller shaft 4, forming a relatively closed space in the area to be dried, so that the hot air can be concentrated in the area to be dried to ensure the drying effect.

[0028] Lifting rings 33 are provided at the top of both the side return air chamber 3 and the rear return air chamber 2, while mounting pieces 22 are provided at the top and bottom of the rear return air chamber 2. The mounting pieces 22 can be used to fix the oven above the coating roller shaft 4, and the lifting rings 33 provide a safe and stable lifting fulcrum to ensure the convenience and reliability of the oven during handling or installation.

[0029] For details, please see Figure 1 The mounting component 22 includes two arms 221 connected at a right angle. One of the arms 221 is connected to the rear return air cavity 2. Both arms 221 are provided with connection holes 222 for easy fixing with screws, bolts or welding.

[0030] In this embodiment, four mounting components 22 and four lifting rings 33 are provided. The four mounting components 22 are arranged in a square at the upper and lower ends of the rear return air cavity 2, which helps to improve the stability of the oven installation. Two of the lifting rings 33 are connected to the rear return air cavity 2, and the other two lifting rings 33 are connected to the two side return air cavities 3 respectively. The four lifting rings 33 are arranged in a square, and all four lifting rings 33 are used at the same time during handling or installation to balance the force.

[0031] Please see Figure 3-4 The air inlet chamber 1 is equipped with a perforated plate 14 facing the air inlet pipe 11. After hot air enters the air inlet chamber 1 through the air inlet pipe 11, the perforated plate 14 adjusts the airflow path, ensuring even output from the air nozzle 12. An explosion-proof door 15 is also installed at the top of the air inlet chamber 1. The explosion-proof door 15 serves a pressure relief function; when the air pressure inside the air inlet chamber 1 reaches its limit, the explosion-proof door 15 can open and release some pressure to avoid the hazards and losses caused by an explosion.

[0032] In this embodiment, the perforated plate 14 is inclined; a plurality of air nozzles 12 are provided, and the plurality of air nozzles 12 are arranged in a diagonal line. The inclination angle of the diagonal line is the same as the inclination angle of the perforated plate 14. The inclined arrangement of the two can cooperate with the surface of the large-diameter coating roller 4, shortening the distance from the air nozzle to the copper foil on the surface of the coating roller 4, so as to improve the drying effect.

[0033] The side walls of the air inlet chamber 1, the side return air chamber 3, and the rear return air chamber 2 are all designed with a double-layer structure. The double-layer structure can reduce the heat exchange between each chamber and the external environment, reduce heat loss, ensure a more stable internal temperature, and greatly improve the overall strength of the oven.

[0034] A preferred embodiment of this utility model also provides a drying device, including a hot air blower, a recovery device, and the oven for hot roller coating of lithium batteries described in the above embodiment. The hot air blower is connected to the air inlet pipe 11 through a pipe, and the recovery device is connected to the air return pipe 21 through a pipe. The hot air blower is used to input hot air into the air inlet chamber 1, and the recovery device is used to recover the air inside the air return chamber 2. When the device is in use, the hot air is evenly distributed at both ends and the middle of the coating roller shaft 4, which improves the drying effect and drying efficiency, is easy to use, and the hot air can be recovered and recycled, which helps to reduce energy consumption.

[0035] The top of the air inlet cavity 1 is also provided with a bracket 16, on which the pipe is placed; specifically, there are two brackets 16, on which the pipe connected to the air inlet pipe 11 and the pipe connected to the air return pipe 21 are placed respectively. The brackets 16 can firmly support the pipe and prevent displacement, sagging or deformation caused by gravity, medium flow or external vibration. In addition, the brackets 16 isolate the pipe from the surface of the air inlet cavity 1 to prevent mechanical collision between the two.

[0036] Furthermore, the bracket 16 is provided with a groove 161, and the pipe is placed in the groove 161. The curvature of the groove 161 matches the curvature of the pipe, which further facilitates the fixing of the pipe.

[0037] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An oven for hot roller coating of lithium batteries, characterized in that: It includes an air inlet chamber, a rear return air chamber, and two side return air chambers. The top and bottom of the air inlet chamber are respectively connected to an air inlet pipe and an air nozzle. The rear return air chamber and the two side return air chambers are all connected to the side wall of the air inlet chamber. The two side return air chambers are arranged opposite each other and protrude downward from the air nozzle. The side wall of each side return air chamber facing the air nozzle is provided with a return air hole. The rear return air chamber is connected to the two side return air chambers and is connected to a return air pipe.

2. The oven for hot roller coating of lithium batteries according to claim 1, characterized in that: Two first sealing plates are provided at the bottom of the air inlet cavity near the air nozzle. The two first sealing plates protrude downward from the air inlet cavity, and the arrangement direction of the two first sealing plates is perpendicular to the arrangement direction of the two side return air cavities. A second sealing plate is surrounded by the side wall edge of the side return air cavity facing the air nozzle, and the second sealing plate protrudes from the side return air cavity in the direction of the air nozzle.

3. The oven for hot roller coating of lithium batteries according to claim 1, characterized in that: Lifting rings are provided at the top of both the side return air cavity and the rear return air cavity, and mounting components are provided at the top and bottom of the rear return air cavity.

4. The oven for hot roller coating of lithium batteries according to claim 3, characterized in that: The mounting component includes two arms connected at a right angle, with one of the arms connected to the rear return air cavity.

5. The oven for hot roller coating of lithium batteries according to claim 1, characterized in that: A perforated plate is provided inside the air inlet cavity, and the perforated plate faces the air inlet pipe.

6. The oven for hot roller coating of lithium batteries according to claim 5, characterized in that: The perforated plate is inclined; several air nozzles are provided, and the air nozzles are arranged in a diagonal line with the same inclination angle as the perforated plate.

7. The oven for hot roller coating of lithium batteries according to claim 1, characterized in that: The top of the air intake cavity is also equipped with an explosion-proof door.

8. The oven for hot roller coating of lithium batteries according to claim 1, characterized in that: The side walls of the air inlet cavity, the side return air cavity, and the rear return air cavity are all designed with a double-layer structure.

9. A drying device, characterized in that: The device includes a hot air blower, a recycling device, and an oven for hot roller coating of lithium batteries as described in any one of claims 1-8. The hot air blower is connected to the air inlet pipe via a pipe, and the recycling device is connected to the air return pipe via a pipe. The hot air blower is used to input hot air into the air inlet cavity, and the recycling device is used to recycle the air inside the air return cavity.

10. The drying equipment according to claim 9, characterized in that: The top of the air inlet cavity is also provided with a bracket, and the bracket is provided with a groove, in which the pipe is placed.

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