Integrated drying oven

Abstract

An integrated drying oven comprises a drying oven cavity used for containing pole pieces and a ventilation cavity movably arranged above the drying oven cavity, a plurality of air nozzles facing the pole pieces are arranged in the ventilation cavity, and an air inlet cavity and an air return cavity which are communicated with the air nozzles are arranged on the two sides of the ventilation cavity respectively; the widths of the air inlet chamber and the air return chamber are gradually reduced from the middle to the two ends; compared with the prior art, the pole piece is dried through the air inlet chamber and the air return chamber which are arranged on the ventilation chamber and under the action of the multiple air nozzles, meanwhile, the width of the air inlet chamber and the width of the air return chamber are gradually reduced from the middle to the two ends, and the ventilation chamber is connected to the middle of the air inlet chamber and the middle of the air return chamber; therefore, the flow speed of gas entering the air inlet chamber is gradually increased when the gas flows to the two ends, the flow speed of the gas flowing out of the air nozzles at the two ends of the air inlet chamber is the same, it is guaranteed that the drying effects of different positions of the pole piece are the same, and the drying quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, and particularly relates to an integrated oven. Background Art

[0002] In the field of battery manufacturing, pole piece coating is a commonly used technology, mainly used for manufacturing the positive and negative pole pieces of lithium-ion batteries. Pole piece coating is a printing process that uses a printing machine to evenly coat a slurry mixture of electrode materials and conductive additives on a conductive substrate such as aluminum foil or copper foil. Generally speaking, the upper and lower surfaces of the foil are coated with wet slurry to form a coated pole piece, and the wet coated pole piece needs to be dried in an oven to form a dry coated pole piece. Pole piece coating is a very important process in battery manufacturing, which directly affects the performance and quality of the battery, such as affecting the energy density, cycle life, safety, etc. of the battery.

[0003] The existing oven structure mainly includes a drying box body, an upper hull and a lower hull, and air nozzles on the hull. The upper and lower hulls in the oven occupy most of the entire oven, and the volume of the entire oven is relatively large; the form of the air nozzles used is mostly inner eight-shaped air nozzles. The air outlet of this kind of air nozzle is two converging slits of air blowing towards the pole piece, which has a great impact on the air outlet uniformity of the pole piece and also has a great destructive force on the pole piece.

[0004] To solve the above problems, Chinese Patent with application number 202310822895.6 discloses a compact oven. The disclosed compact oven is used for drying pole piece coating, and includes an oven chamber for accommodating the pole piece. Both sides of the pole piece in the oven chamber are provided with an air inlet chamber and an air return chamber. The air inlet chamber is connected with a multi-slit air nozzle for air outlet, the air return chamber is communicated with the oven chamber, and the end of the multi-slit air nozzle close to the pole piece is formed with a plurality of air outlet slits. Chinese Patent with application number 202210515590.6 discloses an oven. The disclosed oven includes a drying box body and an upper hull and a lower hull arranged in the inner cavity of the drying box body. The front end and the rear end of the drying box body are respectively provided with a pole piece inlet and a pole piece outlet. One side of the drying box body is provided with an upper air inlet and a lower air inlet. The upper air inlet is communicated with the inner cavity of the upper hull, the lower air inlet is communicated with the inner cavity of the lower hull. There is a hull gap for the pole piece to pass between the bottom end of the upper hull and the top end of the lower hull. The bottom end of the upper hull is provided with a plurality of upper air nozzles communicated with the inner cavity of the upper hull, and the top end of the lower hull is provided with a plurality of lower air nozzles communicated with the inner cavity of the lower hull. The bottom end of the upper hull is provided with a plurality of electromagnetic induction heating plates. The plurality of upper air nozzles and the plurality of electromagnetic induction heating plates are alternately arranged at intervals along the length direction of the upper hull, and the plurality of lower air nozzles are arranged at intervals along the length direction of the lower hull.

[0005] In the above-mentioned disclosed prior art, an oven chamber is provided, and an air inlet chamber and an air return chamber are arranged in the oven chamber. A plurality of air nozzles are connected to the air return chamber, and the air nozzles are used to dry the electrode plates. Although the above-mentioned solution cancels the form of the upper and lower hulls, when the gas enters the air inlet chamber, the outflow of the gas increases. The flow rate of the gas blown out from the air nozzles at the tail end of the air inlet chamber is the largest, while the flow rate of the gas from the air nozzles at the inlet end of the air inlet chamber is smaller. The air flows with different flow rates acting on the electrode plates result in different drying effects at different positions of the electrode plates, thereby reducing the drying quality of the electrode plates. Summary of the Invention

[0006] The present invention is to overcome the defects in the above-mentioned prior art, and provides an integrated oven that can improve the different gas flow rates and ensure the drying effect and quality of the electrode plates.

[0007] To achieve the above-mentioned utility model purpose, the present invention adopts the following technical solutions: An integrated oven includes an oven chamber for accommodating electrode plates and a ventilation chamber movably arranged above the oven chamber. A plurality of air nozzles facing the electrode plates are arranged in the ventilation chamber, and an air inlet chamber and an air return chamber communicated with the plurality of air nozzles are respectively arranged on both sides of the ventilation chamber; the widths of both the air inlet chamber and the air return chamber gradually become smaller from the middle to both ends.

[0008] As a preferred solution of the present invention, a plurality of air outlet openings arranged along the length direction of the air inlet chamber are formed on the side surface of the air inlet chamber, and the plurality of air outlet openings are communicated with the corresponding plurality of air nozzles.

[0009] As a preferred solution of the present invention, an air inlet opening is formed in the middle of the top end of the air inlet chamber, and a ventilation opening communicated with the air inlet opening is arranged on the ventilation chamber.

[0010] As a preferred solution of the present invention, a plurality of air return inlets and pressure relief holes arranged along the length direction of the air return chamber are formed on the side surface of the air return chamber. The plurality of air return inlets are communicated with the corresponding plurality of air nozzles, and the plurality of pressure relief holes are communicated with the oven chamber.

[0011] As a preferred solution of the present invention, an air return outlet is formed in the middle of the top end of the air return chamber, and an exhaust port communicated with the air return outlet is arranged on the ventilation chamber.

[0012] As a preferred solution of the present invention, a plurality of conveying rollers arranged along the length direction of the oven chamber are arranged in the oven chamber. The electrode plates are located on the conveying rollers, and through grooves for the electrode plates to enter and exit are formed at both ends of the oven chamber.

[0013] As a preferred solution of the present invention, a driving member for driving the ventilation chamber to move is arranged at the corner of the ventilation chamber, and a fixing block connected to the output end of the driving member is arranged at the corner of the oven chamber.

[0014] As a preferred embodiment of the present utility model, several of the air nozzles are arranged along the length direction of the ventilation chamber. An air nozzle inlet communicating with the air outlet is formed on the air nozzle, and an air nozzle outlet facing the electrode plate is formed at the bottom of the air nozzle.

[0015] As a preferred embodiment of the present utility model, a first air distribution plate and a return air member are provided inside the air nozzle, and a second air distribution plate and a return air mesh plate are provided inside the return air member.

[0016] As a preferred embodiment of the present utility model, an air nozzle return air inlet and an air nozzle return air outlet communicating with the return air member are formed on the air nozzle. The air nozzle return air inlet communicates with the oven chamber, and the air nozzle return air outlet communicates with the return air inlet of the return air chamber.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The electrode plate is dried by the action of the air inlet chamber and the return air chamber provided on the ventilation chamber and several air nozzles. At the same time, the widths of the air inlet chamber and the return air chamber gradually decrease from the middle to both ends, and the ventilation chamber is connected to the middle of the air inlet chamber and the return air chamber. Thus, the flow rate of the gas entering the air inlet chamber gradually increases when flowing towards both ends, and further, the flow rates of the gas flowing out from the air nozzles at both ends of the air inlet chamber are the same, ensuring the same drying effect at different positions of the electrode plate, improving the drying quality. In addition, when the gas in the oven chamber enters the return air chamber and flows towards the middle, the flow rate gradually decreases, increasing the residence time of the gas in the oven chamber, and further increasing the drying time of the electrode plate, improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the separation of the oven chamber and the ventilation chamber of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the ventilation chamber of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the oven chamber;

[0023] Figure 5 is a partial schematic structural diagram of the air inlet chamber;

[0024] Figure 6 is a schematic structural diagram of the return air chamber;

[0025] Figure 7 is a schematic structural diagram of the air nozzle

[0026] Reference numerals: ventilation chamber 1, air outlet 101, ventilation opening 102, driving member 103, oven chamber 2, through slot 201, conveying roller 202, fixing block 203, air nozzle 3, air nozzle inlet 301, air nozzle outlet 302, first air distribution plate 303, air return member 304, second air distribution plate 3041, air return mesh plate 3042, air nozzle air return inlet 3043, air nozzle air return outlet 3044, air inlet chamber 4, air inlet 401, air outlet 402, air return chamber 5, air return outlet 501, air return inlet 502, pressure relief hole 503, electrode sheet 6. Detailed implementation mode

[0027] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0028] As Figures 1-7 shown, an integrated oven includes an oven chamber 2 for accommodating the electrode sheet 6 and a ventilation chamber 1 movably arranged above the oven chamber 2. A plurality of air nozzles 3 are arranged in the ventilation chamber 1 facing the electrode sheet 6. An air inlet chamber 4 and an air return chamber 5 communicated with the plurality of air nozzles 3 are respectively arranged on both sides of the ventilation chamber 1; the widths of both the air inlet chamber 4 and the air return chamber 5 gradually decrease from the middle to both ends.

[0029] Further, the electrode sheet 6 passes through the oven chamber 2, the ventilation chamber 1 is covered above the electrode sheet 6, a plurality of air nozzles 3 are arranged along the length direction of the ventilation chamber 1, and a plurality of air nozzles 3 are located on the moving path of the electrode sheet 6; the air inlet chamber 4 and the air return chamber 5 are arranged along the length direction of the ventilation chamber 1, and a plurality of air nozzles 3 are arranged between the air inlet chamber 4 and the air return chamber 5. Both the air inlet chamber 4 and the air return chamber 5 are trapezoidal structures, and the bottom sides of the trapezoidal structures face the inner side of the ventilation chamber 1. The air nozzles 3 are connected to the bottom sides of the trapezoidal structures; the electrode sheet 6 is dried under the action of the air inlet chamber 4 and the air return chamber 5 arranged on the ventilation chamber 1 and the plurality of air nozzles 3.

[0030] The widths of the air inlet chamber 4 and the air return chamber 5 gradually decrease from the middle to both ends, and the ventilation chamber 1 is connected to the middle of the air inlet chamber 4 and the air return chamber 5. Specifically, the width of the air inlet chamber 4 gradually decreases along the gas flow direction, and the width of the air return chamber 5 gradually increases along the gas flow direction. Thus, the flow rate of the gas entering the air inlet chamber 4 gradually increases when flowing towards both ends, and further the flow rates of the gas flowing out from the air nozzles 3 at both ends of the air inlet chamber 4 are the same, ensuring the same drying effect at different positions of the electrode sheet 6 and improving the drying quality; in addition, when the gas in the oven chamber 2 enters the air return chamber 5 and flows towards the middle, the flow rate gradually decreases, increasing the residence time of the gas in the oven chamber 2, and further increasing the drying time of the electrode sheet and improving the drying efficiency.

[0031] On the side of the air inlet chamber 4, several air outlet openings 402 are formed along the length direction of the air inlet chamber 4. The several air outlet openings 402 communicate with the corresponding several air nozzles 3. Further, the several air outlet openings 402 are evenly distributed on the side of the air inlet chamber 4. An air nozzle inlet 301 communicating with the air outlet opening 402 is formed on the air nozzle 3. Gas enters the air nozzle 3 through the air outlet opening 402 and the air nozzle inlet 301.

[0032] At the bottom of the air nozzle 3, an air nozzle outlet 302 facing the electrode plate 6 is formed. An air return member 304 is arranged in the air nozzle 3 and is arranged along the length direction of the air nozzle 3. The air nozzle outlet 302 is located on both sides of the air return member 304. Gas blows towards the electrode plate 6 through the air nozzle outlet 302.

[0033] In the middle of the top end of the air inlet chamber 4, an air inlet 401 is formed. A ventilation opening 102 communicating with the air inlet 401 is provided on the ventilation chamber 1. External gas enters the air inlet chamber 4 through the ventilation opening 102 and the air inlet 401.

[0034] On the side of the air return chamber 5, several air return inlets 502 and pressure relief holes 503 are formed along the length direction of the air return chamber 5. The several air return inlets 502 communicate with the corresponding several air nozzles 3. The several pressure relief holes 503 communicate with the oven chamber 2. Further, the several air return inlets 502 and the several pressure relief holes 503 are evenly distributed on the side of the air return chamber 5. An air nozzle air return inlet 3043 and an air nozzle air return outlet 3044 communicating with the air return member 304 are formed on the air nozzle 3. The air nozzle air return inlet 3043 communicates with the oven chamber 2. The air nozzle air return outlet 3044 communicates with the air return inlet 502 of the air return chamber 5. In addition, the pressure relief hole 503 communicates with the oven chamber 2. The air flow in the oven chamber 2 can directly enter the air return chamber 5 through the pressure relief hole 503, thereby improving the air return efficiency and avoiding damage to the electrode plate caused by excessive air pressure in the oven chamber 2.

[0035] In addition, an air return mesh plate 3042 matching the air nozzle air return inlet 3043 is arranged in the air return member 304. The gas in the oven chamber 2 enters the air return member 304 through the air nozzle air return inlet 3043 and the air return mesh plate 3042, and then enters the air return chamber 5 through the air nozzle air return outlet 3044 and the air return inlet 502 communicating with the air nozzle air return outlet 3044.

[0036] In the middle of the top end of the air return chamber 5, an air return outlet 501 is formed. A exhaust port 101 communicating with the air return outlet 501 is provided on the ventilation chamber 1. The gas entering the air return chamber 5 is discharged through the air return outlet 501 and the exhaust port 101.

[0037] Inside the oven chamber 2, there are several conveying rollers 202 arranged along the length direction of the oven chamber 2. The pole piece 6 is located on the conveying rollers 202, and through grooves 201 for the pole piece 6 to enter and exit are formed at both ends of the oven chamber 2. Further, the conveying rollers 202 are rotatably connected to the oven chamber 2, and the pole piece 6 is conveyed by the several conveying rollers 202, so that the pole piece 6 moves in the oven chamber 2.

[0038] At the corners of the ventilation chamber 1, there is a driving member 103 for driving the ventilation chamber 1 to move. At the corners of the oven chamber 2, there is a fixing block 203 connected to the output end of the driving member 103. Further, the driving member 103 can be an electric cylinder or the like. By moving the ventilation chamber 1 upward through the driving member 103, the ventilation chamber 1 is separated from the oven chamber 2, which facilitates the disassembly, assembly and maintenance of the air nozzle 3.

[0039] Inside the air nozzle 3, there is a first air distribution plate 303. Inside the air return member 304, there is a second air distribution plate 3041. Further, the first air distribution plate 303 is arranged above the air return member 304 and is arranged along the length direction of the air nozzle 3. After the gas enters the air nozzle 3, it passes through the first air distribution plate 303 and blows from the air nozzle outlet 302 to the pole piece 6. Under the action of the first air distribution plate 303, the uniformity of the gas blown to the pole piece 6 is improved; in addition, the second air distribution plate 3041 is arranged above the air return mesh plate 3042 and the air nozzle air return inlet 3043 and is arranged along the length direction of the air return member 304. When the gas enters the air return member 304 through the air return mesh plate 3042 and the air nozzle air return inlet 3043, it passes through the second air distribution plate 3041 and enters the air return chamber 5 from the air nozzle air return outlet 3044 and the air return inlet 502. Under the action of the second air distribution plate 3041, the uniformity of the gas entering the air return chamber 5 is improved.

[0040] Gas flow process: The gas flows into the air inlet chamber 4 through the ventilation opening 102 and the air inlet 401, then flows into the air nozzle 3 through the air outlet 402 and the air nozzle inlet 301, undergoes air inlet air distribution through the first air distribution plate 303, flows into the oven chamber 2 through the air nozzle outlet 302 and acts on the pole piece 6, then flows into the air return member 304 of the air nozzle 3 through the air nozzle air return inlet 3043 and the air return mesh plate 3042, undergoes air outlet air distribution through the second air distribution plate 3041, and flows into the air return chamber 5 through the air nozzle air return outlet 3044 and the air return inlet 502, and finally flows out through the air return outlet 501 and the exhaust port 101. Among them, the air flow in the oven chamber 2 can directly flow into the air return chamber 5 through the pressure relief hole 503 on the air return chamber 5.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model; therefore, the present utility model will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features disclosed herein.

[0042] Although the following terms are used more frequently herein: ventilation chamber 1, air outlet 101, air vent 102, driving member 103, oven chamber 2, through slot 201, conveying roller 202, fixing block 203, air nozzle 3, air nozzle inlet 301, air nozzle outlet 302, first air distribution plate 303, air return member 304, second air distribution plate 3041, air return mesh plate 3042, air nozzle air return inlet 3043, air nozzle air return outlet 3044, air inlet chamber 4, air inlet 401, air outlet 402, air return chamber 5, air return outlet 501, air return inlet 502, pressure relief hole 503, electrode sheet 6, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. An integrated oven, characterized in that: The invention comprises an oven chamber (2) for accommodating an electrode (6) and a ventilation chamber (1) movably arranged above the oven chamber (2); the ventilation chamber (1) is provided with a plurality of air nozzles (3) arranged toward the electrode (6); an air inlet chamber (4) and an air return chamber (5) connected to the plurality of air nozzles (3) are respectively arranged on both sides of the ventilation chamber (1); the widths of the air inlet chamber (4) and the air return chamber (5) gradually decrease from the middle to the two ends; the ventilation chamber (1) is connected to the middle of the air inlet chamber (4) and the air return chamber (5).

2. An integrated oven according to claim 1, characterized in that: A plurality of air outlets (402) are formed on the side of the air inlet chamber (4) and are arranged along the length direction of the air inlet chamber (4), and the plurality of air outlets (402) are connected to the corresponding plurality of air nozzles (3).

3. The integrated oven according to claim 1, characterized in that: An air inlet (401) is formed at the middle of the top end of the air inlet chamber (4), and a ventilation opening (102) connected to the air inlet (401) is provided on the ventilation chamber (1).

4. The integrated oven according to claim 1, characterized in that: The side surface of the return air chamber (5) is formed with a plurality of return air inlets (502) and pressure relief holes (503) arranged along the length direction of the return air chamber (5); the plurality of return air inlets (502) are connected to a corresponding plurality of air nozzles (3); and the plurality of pressure relief holes (503) are connected to the oven chamber (2).

5. The integrated oven according to claim 1, characterized in that: A return air outlet (501) is formed at the middle of the top end of the return air chamber (5), and an exhaust port (101) connected to the return air outlet (501) is provided on the ventilation chamber (1).

6. The integrated oven according to claim 1, characterized in that: A plurality of conveying rollers (202) are arranged in the oven chamber (2) along the length direction of the oven chamber (2), the pole piece (6) is located on the conveying rollers (202), and through grooves (201) for the pole piece (6) to enter and exit are formed at both ends of the oven chamber (2).

7. The integrated oven according to claim 1, characterized in that: A driving member (103) for driving the ventilation chamber (1) to move is provided at a corner of the ventilation chamber (1), and a fixing block (203) connected to an output end of the driving member (103) is provided at a corner of the oven chamber (2).

8. The integrated oven according to claim 2, characterized in that: A plurality of the air nozzles (3) are arranged along the length direction of the ventilation chamber (1); an air nozzle inlet (301) connected to the air outlet (402) is formed on the air nozzle (3); and an air nozzle outlet (302) arranged toward the pole piece (6) is formed at the bottom of the air nozzle (3).

9. The integrated oven according to claim 4, characterized in that: The air nozzle (3) is provided with a first air uniforming plate (303) and an air return member (304), and the air return member (304) is provided with a second air uniforming plate (3041) and an air return mesh plate (3042).

10. An integrated oven according to claim 9, characterized in that: The air nozzle (3) is formed with an air nozzle return air inlet (3043) and an air nozzle return air outlet (3044) which are connected to the return air component (304); the air nozzle return air inlet (3043) is connected to the oven chamber (2), and the air nozzle return air outlet (3044) is connected to the return air inlet (502) of the return air chamber (5).

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