Detachable flow equalizing air knife for lithium battery drying oven

Abstract

The detachable flow equalizing air knife comprises an air knife shell, a flow equalizing sieve plate is welded to the inner wall of the air knife shell, a plurality of flow equalizing holes are formed in the flow equalizing sieve plate, a buffer cavity is formed below the flow equalizing holes, a pressure relief plate is arranged at the lower end of the buffer cavity, pressure relief holes are formed in the pressure relief plate, and the flow equalizing sieve plate is provided with a plurality of flow equalizing holes. The pressure relief plate is welded to the air knife shell to form an air knife outlet with a certain slit width, buckle devices are arranged on the two sides of the air knife shell, and the air knife shell is connected with a drying oven shell through the buckle devices. The drying oven is simple and practical in structure and convenient to disassemble when used in the drying oven; and meanwhile, the air flow equalizing effect on air in the drying oven is achieved, the air speed uniformity of the air outlets of the air knives is guaranteed, and the drying efficiency of the battery pole pieces is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery drying ovens, specifically to a detachable airflow equalization knife. Background Technology

[0002] Lithium-ion batteries for power applications have been widely used in electric vehicles, high-speed rail, aerospace, and other fields due to their advantages such as high energy density, high discharge power, no memory effect, and long cycle life. In the manufacturing process of power lithium-ion batteries, the drying process after electrode coating is particularly important, directly affecting the performance and lifespan of the finished battery. An oven is an essential piece of equipment in the electrode drying process, and the air knife is a core component within the oven, playing a role in organizing, homogenizing, and adjusting airflow.

[0003] A well-designed air knife structure can provide a uniform and stable air velocity field for electrode drying, ensuring better convective heat transfer between the electrode and the hot air, and avoiding uneven drying, surface wrinkles, and curling on both sides of the electrode during the drying process.

[0004] Traditional air knives have complex structures, are not easy to disassemble in ovens, and have little effect on equalizing airflow, making it impossible to guarantee the consistency and uniformity of airflow at the air knife outlet.

[0005] The existing air knife has a novel form and simple structure. It is not only easy to disassemble, but also, under the action of the flow equalization sieve plate and the gradually narrow channel, blows out a thin and narrow hot air flow through the air knife outlet, which improves the drying uniformity and stability of the battery electrode surface. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a detachable flow equalization air knife for lithium battery ovens.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A detachable flow equalization air knife for a lithium battery oven includes an air knife housing. The air knife housing has a flow equalization sieve plate welded to its inner wall, and the sieve plate has several flow equalization holes. Below the flow equalization holes is a buffer chamber, and at the lower end of the buffer chamber is a pressure relief plate with pressure relief holes. The pressure relief plate is welded to the air knife housing to form an air knife outlet with a certain slit width. The air knife housing has buckles on both sides, and the air knife housing is connected to the oven housing via the buckles. The oven housing has buckle grooves and screw holes, and the buckles and buckle grooves are embedded. The buckles and screw holes are fastened together by bolts.

[0009] Furthermore, the buckles are two identical structures, so there is no need to distinguish the front or back of the air knife installation.

[0010] Furthermore, the flow equalization screen plate is located 10mm below the air inlet of the air knife, and an array of flow equalization holes with a diameter of 5mm are arranged on it.

[0011] Furthermore, the buffer chamber has a tapering channel below it, through which air flows towards the air knife outlet, forming a thin and narrow airflow.

[0012] Furthermore, the air knife outlet is a slit outlet with a width of 3mm.

[0013] Furthermore, the pressure relief plate is connected to the air knife housing by welding, and its surface has two rows of pressure relief holes with a diameter of 10mm.

[0014] Furthermore, the oven shell is provided with an air inlet, through which air enters the air knife shell.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The structure of the air knife is completely symmetrical. When installing the air knife on the oven body, there is no need to consider the front or back. The buckle at either end can enter the buckle groove or be connected to the screw hole through bolts.

[0017] 2. The air knife is easy and convenient to disassemble. Simply unscrew the bolt along one end of the screw hole, and the air knife can be pulled out along its length. The operation is simple and saves time.

[0018] 3. The flow equalization holes on the flow equalization screen plate enable the hot air to be evenly distributed after entering the air knife, and then flow out through the gradually narrowing channel, forming a thin and narrow airflow that is evenly distributed along the length of the air knife.

[0019] 4. The design of the pressure relief hole allows for a more uniform pressure distribution on the electrode surface when airflow blows onto the electrode in the oven, thereby improving the drying efficiency and effect of the electrode surface. Attached Figure Description

[0020] Figure 1 , Figure 2 This is an isometric view of the air knife structure;

[0021] Figure 3 This is a cross-sectional view of the air knife structure;

[0022] Figure 4 This is a partial view of the oven shell;

[0023] Figure 5 This is an exploded view of the air knife and the oven shell.

[0024] Wherein: 1-Flow equalization sieve plate; 2-Flow equalization hole; 3-Air knife housing; 4-Pressure relief plate; 5-Snap fastener; 6-Pressure relief hole; 7-Buffer chamber; 8-Gradual narrowing channel; 9-Air knife slit outlet; 10-Snap fastener groove; 11-Oven housing; 12-Screw hole; 13-Air inlet. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-5 A detachable flow equalization air knife for a lithium battery oven includes an air knife housing 3. The air knife housing 3 has a flow equalization sieve plate 1 welded to its inner wall, and the sieve plate has several flow equalization holes 2. Below the flow equalization holes is a buffer cavity 7, and at the lower end of the buffer cavity 7 is a pressure relief plate 4, which has pressure relief holes 6. The pressure relief plate 4 is welded to the air knife housing 3 to form an air knife outlet 9 with a certain slit width. The air knife housing 3 has buckles 5 on both sides, and the air knife housing 3 is connected to an oven housing 11 via the buckles 5. The oven housing 11 has buckle grooves 10 and screw holes 12. The buckles 5 and buckle grooves 10 are embedded, and the buckles 5 and screw holes 12 are fastened together by bolts.

[0027] In this invention, the buckles are two identical structures, so there is no need to distinguish the front and back of the air knife installation. The flow equalization screen plate is located 10mm below the air knife inlet, and it is arranged with an array of flow equalization holes with a diameter of 5mm. The buffer chamber is a tapered channel below which air flows to the air knife outlet after passing through the tapered channel, forming a thin and narrow airflow. The air knife outlet is a slit outlet with a width of 3mm. The pressure relief plate is connected to the air knife housing by welding, and its surface has two rows of pressure relief holes with a diameter of 10mm. The oven housing is provided with an air inlet, and air enters the air knife housing through the air inlet on the oven housing.

[0028] like Figure 1 As shown, the flow equalization holes 2 in each row are evenly arranged along the length of the air knife housing 3. As a preferred embodiment, in this case, the diameter of the flow equalization holes 2 on the air knife flow equalization screen plate 1 is 10mm. Of course, those skilled in the art can also choose between 5-15mm according to the actual situation. The smaller the hole diameter and the more holes there are, the better the flow equalization effect. The optimal hole diameter is also related to the material of the flow equalization screen plate 1. In actual work, multiple tests can be conducted to determine the optimal hole diameter.

[0029] Working principle: During use, air enters through the air inlet 13 after passing through the oven shell 11, and then enters the buffer chamber 7 through the flow equalization holes 2 on the flow equalization sieve plate 1. The air gradually flows into the converging channel 8 from the buffer chamber 7 and flows out from the air knife slit outlet 9, blowing towards the electrode in the oven.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A detachable air-equalizing knife for a lithium battery oven, comprising an air-knife housing (3), characterized in that, The inner wall of the air knife housing (3) is welded with a flow equalization screen plate (1), and the flow equalization screen plate is provided with several flow equalization holes (2). Below the flow equalization holes is a buffer cavity (7), and the lower end of the buffer cavity (7) is a pressure relief plate (4), and the pressure relief plate is provided with a pressure relief hole (6). The pressure relief plate (4) is welded to the air knife housing (3) to form an air knife outlet (9) with a certain slit width. The air knife housing (3) is provided with buckles (5) on both sides. The air knife housing (3) is connected to the oven housing (11) through the buckles (5). The oven housing (11) is provided with buckle grooves (10) and screw holes (12). The buckles (5) and buckle grooves (10) are embedded. The buckles (5) are fastened to the screw holes (12) by bolts.

2. The detachable flow equalization air knife for a lithium battery oven according to claim 1, characterized in that: The buckles (5) are two identical structures, so there is no need to distinguish the front and back of the air knife installation.

3. A detachable flow equalization air knife for a lithium battery oven according to claim 1, characterized in that: The flow equalization sieve plate (1) is located 10 mm below the air inlet of the air knife, and an array of flow equalization holes (2) with a diameter of 5 mm are arranged on it.

4. A detachable flow equalization air knife for a lithium battery oven according to claim 1, characterized in that: Below the buffer chamber (7) is a narrow channel (8). After passing through the narrow channel (8), the air flows to the air knife outlet (9), forming a thin and narrow airflow.

5. A detachable air-equalizing knife for a lithium battery oven according to claim 1, characterized in that: The air knife outlet (9) is a slit outlet with a width of 3mm.

6. A detachable air-equalizing knife for a lithium battery oven according to claim 1, characterized in that: The pressure relief plate (4) is connected to the air knife housing (3) by welding, and its surface has two rows of pressure relief holes with a diameter of 10mm.

7. A detachable flow equalization air knife for a lithium battery oven according to claim 1, characterized in that: The oven shell (11) is provided with an air inlet (13), and air enters the air knife shell (3) through the air inlet (13) on the oven shell (11).

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