Slit-adjustable drying oven tuyere, drying oven and coating machine

Abstract

The utility model discloses a slit-adjustable drying oven tuyere, a drying oven and a coating machine, the slit-adjustable drying oven tuyere comprises a tuyere shell and a guide plate arranged in the tuyere shell, and a slit is formed by a gap between the tuyere shell and the guide plate; a plurality of adjusting assemblies for adjusting the size of the slit are arranged on the tuyere shell; a guide rail is installed at the bottom of the tuyere shell, a plurality of baffle assemblies are detachably installed on the guide rail, and the two ends of each baffle assembly can shield the slits. According to the air nozzle, the multiple adjusting assemblies are arranged on the air nozzle shell and used for adjusting the size of the slit, so that the air outlet amount is adjusted to meet the requirements of different pole pieces, and the practicability of the air nozzle is improved; meanwhile, the movable and detachable baffle assembly is arranged at the bottom of the tuyere shell, the baffle assembly can move through a sliding block, the baffle assembly mainly aims at blocking air flowing out of the slit from the position and mainly improving wrinkling of the drying oven pole piece at the blank position, and through the effect of the tuyere baffle, the pole piece and the pole lug are not affected by drying oven air.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, specifically to a slit-adjustable oven nozzle, an oven, and a coating machine. Background Technology

[0002] Coating is the process of uniformly applying a slurry with a certain viscosity and solid content onto a substrate, followed by drying in an oven to form an electrode sheet with a specific areal density and size. In the lithium-ion battery electrode sheet production process, the quality of the electrode sheet coating directly determines the battery's safety performance and capacity consistency. The quality of the coating is determined by both the coating effect and the drying effect. As the conveyor passes through an drying tunnel composed of multiple ovens, the heating plates inside the oven nozzles heat the gas entering from the air inlet channel, turning it into hot air. This hot air is then blown onto the electrode sheet, thereby drying the active slurry.

[0003] The prior art patent with patent publication number CN213194424U, entitled "A Uniform Air Nozzle and Its Oven", specifically discloses "a nozzle housing connected to the oven cavity and a first uniform air plate disposed on the nozzle housing; a second uniform air plate is provided at the connection between the nozzle housing and the oven cavity, the second uniform air plate protruding or recessed towards the oven cavity between the oven cavity and the nozzle housing, and a uniform air cavity is formed between the first uniform air plate and the second uniform air plate". Although the above-mentioned prior art can generate uniform air, the air volume cannot be adjusted according to the needs of different electrodes, and the air volume at different positions cannot be adjusted in a targeted manner, resulting in inconsistent drying of the electrodes and easy cracking. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to provide an oven nozzle with adjustable air volume in a narrow slit.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A slit-adjustable oven nozzle includes a nozzle housing and a guide plate installed inside the nozzle housing, wherein the gap between the nozzle housing and the guide plate forms a slit.

[0007] The nozzle housing is provided with several adjustment components for adjusting the size of the slit; a guide rail is installed at the bottom of the nozzle housing, and several baffle assemblies are detachably installed on the guide rail, wherein the two ends of the baffle assemblies can block the slit.

[0008] This application incorporates several adjustment components on the nozzle housing to regulate the slit size, thereby adjusting the airflow to suit different electrode requirements and improve practicality. Simultaneously, a movable and detachable baffle assembly is installed at the bottom of the nozzle housing. This baffle assembly can be moved via a slider. Its purpose is primarily to block the airflow from the slit at that position, mainly to improve the wrinkling of the electrode sheets in the blank areas of the oven. Since the slit airflow is mainly used for electrode drying, while the electrode tabs do not require drying, the electrode tabs are affected by the oven airflow, causing the electrode sheets to vibrate and wrinkle. The baffle at the nozzle prevents the electrode tabs from being affected by the oven airflow, greatly reducing electrode wrinkling.

[0009] As a further embodiment of this utility model: an air inlet cavity is provided above the air nozzle body, and a sealing strip is embedded on the top connecting surface of the air inlet cavity.

[0010] The purpose of the sealing strip in this application is to ensure that there is no leakage of air from the oven when the air enters the air nozzle from the oven, and to ensure the airtightness when the air nozzle is connected to the oven.

[0011] As a further embodiment of this utility model: the adjustment component includes a plurality of adjustment holes opened on both sides of the nozzle housing along the length direction, and push rod screws or pull rod screws for adjusting the size of the slit between the nozzle housing and the guide plate are installed in the adjustment holes.

[0012] The push rod screw of this application can be installed in the adjustment hole. When tightened, it can increase the size of the slit by compressing the guide plate. When the pull rod screw is installed, it can reduce the size of the slit and reduce the air volume by pulling the nozzle housing to deform it.

[0013] As a further embodiment of this utility model: the bottom two sides of the nozzle housing are inclined, and the guide plate at the corresponding position is also inclined.

[0014] As a further embodiment of this utility model: a mesh-like air hole is provided inside the nozzle housing along the length direction and directly above the guide plate.

[0015] In this application, the air in the oven enters the cavity through the mesh holes, creating a certain pressure in the cavity, and then forming a uniform airflow through the slits. The mesh holes ensure uniform airflow.

[0016] As a further embodiment of this utility model: a nozzle baffle is detachably installed at one end of the nozzle housing, and a nozzle baffle is detachably installed at the other end of the nozzle housing.

[0017] The purpose of the first and second nozzle baffles in this application is to fix the nozzle and ensure that the incoming air does not overflow.

[0018] As a further embodiment of this utility model: the baffle assembly includes a slider and a baffle, wherein the slider is slidably mounted on the guide rail, and the baffle is detachably mounted on the outside of the slider.

[0019] As a further embodiment of this utility model: the guide rail is provided with several mounting holes for connecting with the slider.

[0020] This utility model also discloses an oven, including the aforementioned adjustable oven nozzle.

[0021] This utility model also discloses a coating machine, including the oven described above. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the adjustable slit oven nozzle according to an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the adjustable slit oven nozzle according to an embodiment of the present invention.

[0024] Figure 3 This is an exploded view of another perspective of the adjustable slit oven nozzle of this utility model embodiment;

[0025] Figure 4 This is a front view of the adjustable slit oven nozzle according to an embodiment of the present invention;

[0026] Figure 5 for Figure 4 Sectional view along line AA;

[0027] Figure 6 This is a schematic diagram of the push rod screw in an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the pull rod screw according to an embodiment of the present utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the adjustment hole in an embodiment of the present invention;

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Sealing strip;

[0032] 2. Nozzle body; 21. Air inlet cavity; 22. Nozzle housing; 23. Air outlet cavity; 24. Adjustment hole; 25. Guide plate; 26. Mounting hole one; 27. Mesh air hole; 28. Sealing strip groove;

[0033] 3. Air nozzle baffle one; 4. Air nozzle baffle two;

[0034] 5. Guide rail; 51. Mounting hole two;

[0035] 6. Slider;

[0036] 7. Baffle; 71. Positioning hole.

[0037] 8. Push rod screw; 9. Pull rod screw. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] Example 1

[0040] Reference Figure 1 and Figure 2 An adjustable slit oven nozzle includes a sealing strip 1, a nozzle body 2, a first nozzle baffle 3, a second nozzle baffle 4, a guide rail 5, a slider 6, and a baffle 7. The top of the nozzle body 2 is connected to the oven, and a sealing strip 1 is embedded at the connection point between the top of the nozzle body 2 and the oven. The sealing strip is made of a high-temperature resistant and corrosion-resistant material, which can prevent airflow loss due to poor sealing.

[0041] Reference Figure 2 and Figure 3 The nozzle body 2 includes an air inlet cavity 21, a nozzle housing 22, an air outlet cavity 23, an adjustment hole 24, a guide plate 25, a mounting hole 26, a mesh air hole 27, and a sealing strip groove 28. The air inlet cavity 21 is installed on the top of the nozzle housing 22, and a guide plate 25 of the same length is installed on the lower part of the air inlet cavity 21 along its length. The guide plate 25 has a concave shape and its two sides are inclined, with an inclination angle of 0-90°, generally 45° being optimal. Correspondingly, the two sides of the nozzle housing 22 that contact the guide plate 25 are also designed to be inclined, with an inclination angle of 0-90°, generally 45° being optimal. The two narrow gaps formed between the guide plate 25 and the nozzle housing 22 are slits. The two slits are symmetrically arranged. The purpose of the slits is mainly to form a certain pressure of oven air for drying the electrode surface.

[0042] Furthermore, air nozzle baffle 1 3 and air nozzle baffle 2 4 are installed at both ends of the air nozzle housing 22 to prevent the oven air from overflowing from both sides.

[0043] An air inlet cavity 21 connected to the oven is provided on the upper part of the nozzle housing 22. A sealing strip 1 is installed on the top of the air inlet cavity 21. A mesh air hole 27 is provided along its length inside the air inlet cavity 21. The diameter of each air hole is between 1 mm and 3 mm. The denser the holes, the greater the air volume and the more stable the air volume. The air coming out of the oven can pass through the mesh air hole 27 and form a certain pressure in the cavity. Then it forms a uniform air through the slit and then acts on the electrode.

[0044] Reference Figure 2 The first air nozzle baffle 3 and the second air nozzle baffle 4 are detachably installed to the two ends of the air nozzle body 2 by bolts or pins. The purpose of the two air nozzle baffles is to fix the air nozzle and ensure that the incoming air does not overflow. The first air nozzle baffle 3 is equipped with a handle, which is mainly for the purpose of facilitating the removal of the air nozzle.

[0045] Reference Figure 3 and Figure 8 Several sets of adjustment holes 24 are provided on the lower sides of the nozzle housing 22 (i.e., on the inclined surface). The adjustment holes are also threaded holes. Correspondingly, internal threaded holes are provided on both sides of the guide plate 25. When the push rod screw 8 is used, the push rod screw 8 is threadedly connected to the adjustment hole 24. When the push rod screw 8 is rotated, its end will press against the guide plate 25, which will make the slit larger, thereby ensuring that the air volume at this position increases, thereby improving the drying efficiency of this part.

[0046] When using the pull rod screw 9, the tail end of the pull rod screw 9 is threaded and threaded to the internal threaded hole on the guide plate 25. Rotating the pull rod screw 9 can pull the guide plate 25 to reduce the slit, thereby reducing the airflow at that position and thus reducing the drying efficiency at that position. The main purpose of this part of the design is to improve the uneven drying degree caused by the difference in surface density of the electrode, thereby improving the problems of electrode cracking and excessive moisture. The number of holes in this part is not limited to the number shown in the figure, and is designed according to the size of the electrode.

[0047] Reference Figure 6 and Figure 8 The head of the push rod screw 8 is threaded, and the thread is threaded to the adjustment hole 24. The tail is a rod body, which can push the guide plate 25 when rotated.

[0048] Reference Figure 7 and Figure 8 The head of the pull rod screw 9 is a rod body, and the tail is threaded. The threaded part is threaded to the internal threaded hole on the guide plate 25. Rotating the pull rod screw 9 can pull the guide plate 25 to reduce the slit.

[0049] Reference Figure 3 and Figure 5The guide rail 5 is installed at the bottom of the guide plate 25 along the length of the guide plate 25. Several mounting holes 26 are provided at the bottom of the guide plate 25. The guide rail 5 is provided with mounting holes 51 corresponding to the positions of the mounting holes 26. The mounting holes 26 and the mounting holes 51 are detachably installed by bolts or pins.

[0050] Reference Figure 3 and Figure 5 Several sliders 6 are slidably engaged on the outer side of the guide rail 5. A baffle 7 is installed on the outer side of the slider 6. The baffle 7 has a positioning hole 71. The slider 6 has a corresponding mounting hole on the side facing the baffle 7. The mounting hole is connected to the positioning hole 71 by bolts or pins, thereby realizing the connection between the slider 6 and the baffle 7.

[0051] The slider 6 can move on the guide rail 5 to facilitate the adjustment of the position of the baffle 7. The number of sliders is not limited to the four shown in the figure. The number of sliders 6 mainly depends on the number of electrode tabs.

[0052] The baffle 7 can be moved by the slider 6. The purpose of this component is mainly to block the air coming out of the slit at this position, which mainly improves the wrinkling of the electrode in the blank position of the oven. Since the air in the slit is mainly used for drying the electrode, while the electrode tabs do not need to be dried, the electrode tabs will be affected by the oven air, causing the electrode to shake and wrinkle. Through the action of the baffle 7, the electrode tabs are not affected by the oven air, which can greatly improve the wrinkling of the electrode.

[0053] In use, the air inlet chamber 21 of the air nozzle fixes the air nozzle on the oven, and the middle seal is sealed by the sealing strip 1. The circulating fan sends the filtered hot air into the oven, and then enters through the air inlet chamber 21 of the air nozzle, then passes through the mesh air hole 27, and is compressed, and finally passes through the slit to form a wind with a certain pressure and a certain speed to be discharged evenly, so as to dry the electrode sheet.

[0054] Example 2

[0055] This embodiment discloses an oven, including the adjustable oven nozzle described in Embodiment 1. The adjustable oven nozzle is installed at the air outlet of the oven, so that the air coming out of the oven can be guided out through the adjustable oven nozzle and act on the electrode.

[0056] Example 3

[0057] This embodiment discloses a coating machine, including the drying oven described in Embodiment 2.

[0058] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slit-adjustable oven nozzle, comprising a nozzle housing (22) and a guide plate (25) installed inside the nozzle housing (22), wherein the gap between the nozzle housing (22) and the guide plate (25) forms a slit; characterized in that: The nozzle housing (22) is provided with several adjustment components for adjusting the size of the slit; a guide rail (5) is installed at the bottom of the nozzle housing (22), and several baffle assemblies are detachably installed on the guide rail (5), wherein the two ends of the baffle assembly can block the slit.

2. The adjustable slit oven nozzle according to claim 1, characterized in that: An air inlet cavity (21) is provided above the air nozzle body (2), and a sealing strip (1) is embedded on the top connecting surface of the air inlet cavity (21).

3. The adjustable slit oven nozzle according to claim 1, characterized in that: The adjustment assembly includes several adjustment holes (24) on both sides of the nozzle housing (22) along the length direction. The adjustment holes (24) are equipped with push rod screws or pull rod screws for adjusting the size of the slit between the nozzle housing (22) and the guide plate (25).

4. The adjustable slit oven nozzle according to claim 1, characterized in that: The bottom sides of the nozzle housing (22) are inclined, and the guide plate (25) at the corresponding position is also inclined.

5. The adjustable slit oven nozzle according to claim 1, characterized in that: The inside of the nozzle housing (22) is provided with a mesh-like air hole (27) along the length direction and directly above the guide plate (25).

6. The adjustable slit oven nozzle according to claim 1, characterized in that: One end of the nozzle housing (22) is detachably fitted with a nozzle baffle (3), and the other end of the nozzle housing (22) is detachably fitted with a nozzle baffle (4).

7. The adjustable slit oven nozzle according to claim 1, characterized in that: The baffle assembly includes a slider (6) and a baffle (7), wherein the slider (6) is slidably mounted on the guide rail (5), and the baffle (7) is detachably mounted on the outside of the slider (6).

8. The adjustable slit oven nozzle according to claim 7, characterized in that: The guide rail (5) has several mounting holes (51) that are connected to the slider (6).

9. An oven, characterized in that: Including the adjustable oven nozzle as described in any one of claims 1-8.

10. A coating machine, characterized in that: Includes the oven as described in claim 9.

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