Pole piece secondary drying device and pole piece drying equipment

Abstract

According to the pole piece secondary drying device and the pole piece drying equipment, a heating box rotates relative to a support, an air knife rotates relative to the support, the inclination angle of the heating box and the inclination angle of the air knife are adjusted, and pole pieces can be conveniently conveyed between the heating box and the air knife. In the conveying process of the pole piece, the heating box heats the pole piece, so that the temperature of the pole piece is increased, and the purpose of drying the pole piece is achieved; the air knife supplies air to the pole piece, and the coating of the pole piece is dried by wind power. The air knife can cool and dehumidify the pole piece coating, so that the temperature of the coating is reduced while the drying effect is ensured, and the cracking of the pole piece coating caused by temperature difference is avoided; and the cooled pole piece can be conveniently detected by using a surface density meter, so that the production quality of a product is controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lithium battery pole piece coating, concretely relates to a pole piece secondary drying device and pole piece drying equipment. BACKGROUND

[0002] With the development of coating technology, the coating speed is faster and faster, and the base material for coating is thinner and thinner, which is more prone to drying cracking in the oven. At present, this problem is solved by secondary heating of the semi-dried wet film after it comes out of the oven. However, in the traditional secondary drying, the temperature difference between the pole piece and the tension roller is large, and the pole piece passes through the tension roller after the over-heating device, which will also cause cracking and other problems under stress. In addition, the surface density instrument is sensitive to temperature, and the high temperature of the traditional secondary heating device will cause the surface density instrument to detect the pole piece inaccurately, which cannot detect the product quality. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the utility model provides a pole piece secondary drying device and pole piece drying equipment, which can solve the problem of easy cracking and inability to detect product quality in the existing pole piece secondary drying process.

[0004] The utility model solves the technical scheme that adopts: on the one hand, provide a kind of pole piece secondary drying device, including support, heating box and wind force drying component, the heating box is rotatably connected in the support, the wind force drying component includes air knife, the air knife is rotatably connected with the support, the air knife is located above the heating box, the air knife is used to dry air supply to pole piece, and pole piece passes between the air knife and the heating box.

[0005] As a further improvement of the above technical solution, the support includes a support shaft and two oppositely arranged vertical plates, both of which are vertically arranged, and the support shaft is horizontally connected between the two vertical plates; both of the vertical plates are connected with a connecting plate, and the two connecting plates are oppositely arranged; the two sides of the heating box are rotatably connected with the two connecting plates through a first adapter plate.

[0006] As a further improvement of the above technical solution, the first adapter plate is provided with an arc-shaped slot hole, the connecting plate is provided with a first through hole, the aperture of the arc-shaped slot hole is larger than the aperture of the first through hole, a first bolt is arranged between the arc-shaped slot hole and the first through hole, and the first bolt is connected between the first adapter plate and the connecting plate.

[0007] As a further improvement of the above technical solution, the first through hole is provided with two, the two first through holes are arranged in the vertical direction, the two first through holes are located at both ends of the arc-shaped slot hole respectively, and the two first through holes are connected with the arc-shaped slot hole through the first bolt.

[0008] As a further improvement of the above technical solution, the second adapter plate is connected between the two sides of the air knife and the two connecting plates, the second through hole is arranged on the connecting plate, the waist-shaped hole is arranged on the second adapter plate, the hole diameter of the waist-shaped hole is larger than the hole diameter of the second through hole, the second through hole is located in the middle of the waist-shaped hole, and the second bolt is arranged between the waist-shaped hole and the second through hole and connected between the second adapter plate and the connecting plate.

[0009] As a further improvement of the above technical solution, the heating box comprises an electromagnetic heating disc, a magnetic shielding plate and a box body with one end being open, the opening of the box body faces the air knife, the electromagnetic heating disc is located inside the box body, and the magnetic shielding plate is detachably connected with the opening edge of the box body so as to cover different positions of the opening of the box body.

[0010] As a further improvement of the above technical solution, the opening edge of the box body is provided with a connecting groove, the magnetic shielding plate is provided with a connecting hole, and the connecting hole is connected with the connecting groove through a third bolt.

[0011] As a further improvement of the above technical solution, the box body is provided with a heat dissipation interface, and the heat dissipation interface communicates with the inside of the box body.

[0012] As a further improvement of the above technical solution, the wind drying assembly further comprises an air supply member, the air supply member is used for generating wind force, the air knife is provided with an air supply interface, and the air supply member is connected with the air supply interface through a pipeline.

[0013] In another aspect, the application further provides a pole piece drying device, which comprises an oven and the pole piece secondary drying device, and the pole piece is conveyed from the oven to the pole piece secondary drying device.

[0014] The pole piece drying device has the advantages that: the heating box is rotated relative to the support, and the air knife is rotated relative to the support, so that the inclination angle of the heating box and the air knife is adjusted, and the pole piece is conveniently conveyed between the heating box and the air knife; in the conveying process of the pole piece, the heating box heats the pole piece, so that the temperature of the pole piece is increased, and the purpose of drying the pole piece is achieved; the air knife supplies air to the pole piece, and the coating of the pole piece is blown dry by using the wind force; the air knife can cool and dehumidify the coating of the pole piece, the coating temperature is reduced while the drying effect is ensured, and the cracking of the coating of the pole piece caused by the temperature difference is avoided; and the face density instrument is used to detect the cooled pole piece, so that the production quality of the product is controlled. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below in combination with the drawings and examples.

[0016] Figure 1Is the structure schematic diagram of the pole piece secondary drying device provided by the preferred embodiment of the utility model;

[0017] Figure 2 Is Figure 1 The enlarged view of part A in the middle;

[0018] Figure 3 Is Figure 1 The enlarged view of part B in the middle;

[0019] Figure 4 Is the schematic diagram of part structure of the pole piece secondary drying device provided by the preferred embodiment of the utility model.

[0020] The drawing reference: 1, support, 2, heat box, 3, wind force drying assembly;

[0021] 11, vertical plate, 12, support shaft, 13, connecting plate, 21, first adapter plate, 22, electromagnetic heating disc, 23, magnetic shielding plate, 24, box body, 31, air knife, 32, air supply piece;

[0022] 131, first through hole, 132, second through hole, 211, arc slot hole, 231, connecting hole, 241, connecting groove, 242, heat dissipation interface, 311, second adapter plate, 312, waist-shaped hole, 313, air supply interface. DETAILED DESCRIPTION

[0023] The concept, specific structure and generated technical effects of the utility model will be described clearly and completely in the following combined with embodiments and drawings, so as to fully understand the purpose, features and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all embodiments, based on the embodiments of the utility model, other embodiments obtained by the skilled in the art without creative labor are within the scope of the utility model protection. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but means that a better coupling structure can be composed by adding or reducing coupling auxiliary components according to the specific implementation situation, such as fixed connection / fixed installation, which can be selected according to the needs screw connection, bolt connection, pin connection, key connection, adhesion, mortise and tenon connection, welding, riveting and the like, such as detachable connection, which can be selected according to the needs screw connection, bolt connection, threaded connection, buckle connection, mortise and tenon connection, magic tape connection and the like. The various technical features in the utility model creation can be interactively combined without mutual contradiction and conflict.

[0024] Please see Figure 1The utility model discloses an optimal embodiment provides a kind of pole piece secondary drying device, including support 1, heating box 2 and wind force drying component 3, heating box 2 is rotatably connected in support 1, wind force drying component 3 includes air knife 31, air knife 31 is rotatably connected with support 1, air knife 31 is located above heating box 2, air knife 31 is used to dry air supply to pole piece, pole piece passes between air knife 31 and heating box 2.Through make heating box 2 rotate relative to support 1, and make air knife 31 rotate relative to support 1, adjust the inclination angle of heating box 2 and air knife 31, facilitate pole piece to be conveyed between heating box 2 and air knife 31.In the conveying process of pole piece, heating box 2 heats pole piece, makes pole piece temperature rise, to reach the purpose of drying pole piece;Air knife 31 air supply to pole piece, utilize wind power and dry pole piece coating layer.Wind knife 31 can cool pole piece coating layer, dehumidify, reduce coating temperature while guaranteeing drying effect, avoid the cracking of pole piece coating layer due to temperature difference;And it is convenient to use area density appearance to detect pole piece after cooling, to control product production quality.

[0025] Support 1 includes support shaft 12 and two oppositely arranged vertical plates 11, two vertical plates 11 are vertically arranged, and the support shaft 12 is horizontally connected between the two vertical plates 11; both vertical plates 11 are connected with connecting plates 13, and the two connecting plates 13 are oppositely arranged; the two sides of the heating box 2 are rotatably connected with the two connecting plates 13 through the first adapter plate 21. The support 1 is simple in structure, and the heating box 2 and the air knife 31 are rotatably connected with the support 1.

[0026] Please refer to Figure 2 An arc-shaped slot hole 211 is formed on the first adapter plate 21, a first through hole 131 is formed on the connecting plate 13, the diameter of the arc-shaped slot hole 211 is larger than the diameter of the first through hole 131, a first bolt (not shown in the figure) is arranged between the arc-shaped slot hole 211 and the first through hole 131, and the first bolt is connected between the first adapter plate 21 and the connecting plate 13. By disassembling the first bolt and adjusting the different angles of the arc-shaped slot hole 211, the first adapter plate 21 can be rotatably connected to the connecting plate 13 at different angles, so as to adjust the inclination angle of the heating box 2, and make it adapt to the inclination angle of the pole piece.

[0027] The first through hole 131 is provided with two first through holes 131, the two first through holes 131 are arranged in the vertical direction, and the two first through holes 131 are located at the two ends of the arc-shaped slot hole 211 respectively. The two first through holes 131 are connected with the arc-shaped slot hole 211 through the first bolt. The connection stability of the first adapter plate 21 and the connecting plate 13 is enhanced, and relative rotation between the two is prevented.

[0028] Please refer to Figure 3The second adapter plate 311 is connected between the two sides of the air knife 31 and the two connecting plates 13, the second through hole 132 is arranged on the connecting plate 13, the waist-shaped hole 312 is arranged on the second adapter plate 311, the hole diameter of the waist-shaped hole 312 is larger than the hole diameter of the second through hole 132, the second through hole 132 is located in the middle of the waist-shaped hole 312, the second bolt (not shown in the figure) is arranged between the second adapter plate 311 and the connecting plate 13, and the second bolt is connected between the second adapter plate 311 and the connecting plate 13. By disassembling the second bolt and adjusting the different angles of the waist-shaped hole 312, the second adapter plate 311 can be rotated to different angles and connected to the connecting plate 13, so that the inclination angle of the air knife 31 is adjusted, the wind direction is adapted to the inclination angle of the pole piece, and the effects of air drying and cooling are ensured.

[0029] Please refer to Figure 1 and Figure 4 The heating box 2 includes an electromagnetic heating disc 22, a magnetic shielding plate 23 and an open-ended box body 24, the opening of the box body 24 faces the air knife 31, the electromagnetic heating disc 22 is located inside the box body 24, and the magnetic shielding plate 23 is detachably connected with the opening edge of the box body 24, so that the magnetic shielding plate 23 covers different positions of the opening of the box body 24. The magnetic shielding plate 23 can effectively shield the magnetic induction line to avoid heating the lug position, the heating area of the electromagnetic heating disc 22 can be controlled by adjusting the position of the magnetic shielding plate 23, a series of problems caused by lug softening can be avoided, different coating specifications of the pole piece can be adapted to, and the application range of the device is improved.

[0030] In the embodiment, the opening of the box body 24 is provided with a mica sheet covering the electromagnetic heating disc 22, which is used for preventing electric leakage and protecting the electromagnetic heating disc 22 from being damaged.

[0031] Please refer to Figure 4 The opening edge of the box body 24 is provided with a connecting groove 241, the magnetic shielding plate 23 is provided with a connecting hole 231, and the connecting hole 231 is connected with the connecting groove 241 through the third bolt (not shown in the figure). By disassembling the third bolt and adjusting the different positions of the connecting hole 231 and the connecting groove 241, the magnetic shielding plate 23 can cover different positions of the electromagnetic heating disc 22, and the structure is simple and easy to operate.

[0032] Please refer to Figure 1 The box body 24 is provided with a heat dissipation interface 242, the heat dissipation interface 242 communicates with the inside of the box body 24, the electromagnetic heating disc 22 dissipates heat through the heat dissipation interface 242, and the temperature of the electromagnetic heating can be prevented from being too high.

[0033] The wind-drying assembly 3 further comprises an air supply member 32 for generating wind, and the air knife 31 is provided with an air supply interface 313, and the air supply member 32 is connected with the air supply interface 313 through a pipeline (not shown in the figure). The air supply member 32 can continuously supply wind to the air knife 31, so that the air knife 31 can continuously dry the pole piece and cool the pole piece.

[0034] The utility model further provides a kind of pole piece drying equipment, including oven and the pole piece secondary drying device of above-mentioned embodiment, pole piece is transported by oven to pole piece secondary drying device. After pole piece coating is completed, it is dried to half dry by oven high temperature, then pole piece is transported to between heating box 2 and air knife 31, heating box 2 heats pole piece, so that pole piece temperature rises, to reach the purpose of drying pole piece;Air knife 31 air supply to pole piece, utilize wind force to blow dry pole piece coating. Air knife 31 can cool and dehumidify pole piece coating, reduce coating temperature while guaranteeing drying effect, avoid the cracking of pole piece coating due to temperature difference;And it is convenient to use area density appearance to detect pole piece after cooling, to control product production quality.

[0035] The above is a specific description of the preferred embodiment of the utility model, but the utility model is not limited to the described embodiment, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the utility model. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. An electrode tab secondary drying device, characterized by: The device comprises a support, a heating box and a wind drying assembly, the heating box is rotationally connected to the support, the wind drying assembly comprises a wind knife, the wind knife is rotationally connected to the support, the wind knife is above the heating box, and the wind knife is used for drying air supply to the pole piece.

2. The pole piece secondary drying apparatus of claim 1, wherein: The support comprises a support shaft and two opposite vertical plates, the two vertical plates are vertically arranged, and the support shaft is horizontally connected between the two vertical plates; the two vertical plates are connected with connecting plates, and the two connecting plates are opposite; and the two sides of the heating box are rotationally connected with the two connecting plates through first adapter plates.

3. The pole piece secondary drying apparatus of claim 2, wherein: An arc-shaped slot hole is arranged on the first adapter plate, a first through hole is arranged on the connecting plate, the aperture of the arc-shaped slot hole is larger than the aperture of the first through hole, a first bolt is arranged between the arc-shaped slot hole and the first through hole, and the first bolt is connected between the first adapter plate and the connecting plate.

4. The pole piece secondary drying apparatus of claim 3, wherein: The first through hole is provided with two first through holes arranged in the vertical direction, and the two first through holes are located at two ends of the arc-shaped slot hole and connected with the arc-shaped slot hole through the first bolt.

5. The pole piece secondary drying apparatus of claim 2, wherein: Second adapter plates are connected between the two sides of the wind knife and the two connecting plates, second through holes are arranged on the connecting plates, a waist-shaped hole is arranged on the second adapter plate, the aperture of the waist-shaped hole is larger than the aperture of the second through hole, the second through hole is located in the middle of the waist-shaped hole, a second bolt is arranged between the waist-shaped hole and the second through hole, and the second bolt is connected between the second adapter plate and the connecting plate.

6. The pole piece secondary drying apparatus of claim 1, wherein: The heating box comprises an electromagnetic heating disc, a magnetic shielding plate and a box body with one end being open, the opening of the box body faces the wind knife, the electromagnetic heating disc is located inside the box body, and the magnetic shielding plate is detachably connected with the opening edge of the box body so as to cover different positions of the opening of the box body.

7. The pole piece secondary drying apparatus of claim 6, wherein: The opening edge of the box body is provided with a connecting groove, the magnetic shielding plate is provided with a connecting hole, and the connecting hole is connected with the connecting groove through a third bolt.

8. The pole piece secondary drying apparatus of claim 6, wherein: The box body is provided with a heat dissipation interface, and the heat dissipation interface is in communication with the inside of the box body.

9. The pole piece secondary drying apparatus of claim 1, wherein: The wind drying assembly further comprises an air supply piece, the air supply piece is used for generating wind force, the wind knife is provided with an air supply interface, and the air supply piece is connected with the air supply interface through a pipeline.

10. A pole piece drying apparatus characterized by: The device comprises an oven and a pole piece secondary drying device as claimed in any one of claims 1-9, and the pole piece is conveyed from the oven to the pole piece secondary drying device.

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