A drying device for producing positive electrode sheets of batteries

Abstract

The invention relates to the technical field of battery production, and specifically to a drying device for producing positive electrode sheets of batteries. The exhaust ends of the first, second, third and fourth drying furnaces are respectively connected to the first, second, third and fourth drying pipes, the air inlet ends of the first and second drying furnaces are connected to the first heat exchanger through a connecting pipe, the first fan connected to the air inlet end of the first heat exchanger is connected to the exhaust ends of the first and second drying pipes through a connecting pipe, the air inlet ends of the third and fourth drying furnaces are connected to the air inlet end of the second heat exchanger through a connecting pipe, the air inlet end of the second fan is connected to the exhaust ends of the third and fourth drying pipes through a connecting pipe, arc bends are respectively arranged at the corners of the connecting pipes, and the bottom ends of the inner cavities of the first, second, third and fourth drying pipes are provided with a shutter structure, and the inclination angle of the blades in the shutter structure is 30 to 60 degrees. The problem that the drying device occupies a large area and is inconvenient to speed up the drying is solved.

Description

Technical Field

[0001] The invention relates to the technical field of battery production, and in particular to a drying device for producing battery positive electrode sheets. Background Art

[0002] During the battery manufacturing process, after the positive electrode sheets (such as the sheets of lithium batteries and nickel-hydrogen batteries) are sprayed, they need to be dried in a drying device in a timely manner. At present, the drying device used to dry the electrode sheets mainly includes a drying furnace, a drying pipe connected to the drying furnace, and a heat exchanger. After the spraying is completed, the sheet is transferred to the drying pipe, and the sheet is dried in the drying pipe.

[0003] However, in the drying devices for drying the pole pieces after spraying, most of them use horizontal drying pipes, which occupy a large area. In addition, when the drying speed needs to be increased during the drying process of the pole pieces, simply increasing the wind speed will cause the pole pieces inside the channel to swing violently, which is very likely to cause the pole pieces to break; simply increasing the temperature will easily harden and crack the slurry on the pole pieces, causing the pole pieces to fail to meet the quality standards. Summary of the invention

[0004] The object of the present invention is to provide a drying device for producing positive electrode sheets of batteries, so as to solve the problems that the current drying devices occupy a large area and are inconvenient to speed up the drying.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a drying device for producing positive electrode sheets of a battery, comprising a first drying furnace, an exhaust end of the first drying furnace is connected to a first drying pipe, an air inlet end of the first drying furnace is connected to a first heat exchanger, an air inlet end of the first heat exchanger is connected to a first fan, and an air inlet end of the first fan is connected to the other end of the first drying pipe, and further comprising a second drying furnace, a third drying furnace, a fourth drying furnace, a second heat exchanger and a second fan, the exhaust ends of the second drying furnace, the third drying furnace and the fourth drying furnace are respectively connected to a second drying pipe, a third drying pipe and a fourth drying pipe, and the first drying pipe, the second drying pipe, the third drying pipe and the fourth drying pipe are respectively arranged in a vertical direction;

[0006] The air inlet ends of the first drying furnace, the second drying furnace, the third drying furnace and the fourth drying furnace are respectively connected with the first air supply branch pipe, the second air supply branch pipe, the third air supply branch pipe and the fourth air supply branch pipe;

[0007] The exhaust end of the first heat exchanger is connected to the air inlet ends of the first air supply branch pipe and the second air supply branch pipe respectively;

[0008] The exhaust end of the second heat exchanger is connected to the air inlet ends of the third air supply branch pipe and the fourth air supply branch pipe respectively;

[0009] The air inlet end of the second heat exchanger is connected to the exhaust end of the second fan;

[0010] The exhaust ends of the first drying duct, the second drying duct, the third drying duct and the fourth drying duct are respectively connected with the first exhaust branch pipe, the second exhaust branch pipe, the third exhaust branch pipe and the fourth exhaust branch pipe;

[0011] The air inlet end of the first fan is connected to the exhaust ends of the first exhaust branch pipe and the second exhaust branch pipe, and the air inlet end of the second fan is connected to the exhaust ends of the third exhaust branch pipe and the fourth exhaust branch pipe;

[0012] The first air supply branch pipe, the second air supply branch pipe, the third air supply branch pipe, the fourth air supply branch pipe, the first exhaust branch pipe, the second exhaust branch pipe, the third exhaust branch pipe and the fourth exhaust branch pipe are respectively provided with arc-shaped bends at their corners; the setting of the arc-shaped bends greatly reduces the generation of swirl, thereby preventing the pole piece from vigorous shaking during drying;

[0013] The bottom ends of the inner cavities of the first drying duct, the second drying duct, the third drying duct and the fourth drying duct are respectively provided with shutter structures in the horizontal direction, and the inclination angle of the blades in the shutter structures is 30-60°.

[0014] Preferably, the top ends of the first drying duct, the second drying duct, the third drying duct and the fourth drying duct are respectively connected to the top box bodies, and the air inlet ends of the first exhaust branch pipe, the second exhaust branch pipe, the third exhaust branch pipe and the fourth exhaust branch pipe are respectively connected to the top box bodies corresponding to the first drying duct, the second drying duct, the third drying duct and the fourth drying duct.

[0015] Preferably, the exhaust end of the first heat exchanger is connected to a first air supply pipe, the exhaust end of the first air supply pipe is connected to the air inlet ends of the first air supply branch pipe and the second air supply branch pipe, the exhaust end of the second heat exchanger is connected to a second air supply pipe, the exhaust end of the second air supply pipe is connected to the air inlet ends of the third air supply branch pipe and the fourth air supply branch pipe.

[0016] Preferably, the first air supply pipe and the second air supply pipe are respectively provided with arc-shaped bends at their corners; the provision of the arc-shaped bends greatly reduces the generation of swirl flow, thereby preventing the pole piece from vigorous shaking during drying.

[0017] Preferably, the air inlet end of the first fan is connected to a first exhaust pipe, the air inlet end of the first exhaust pipe is connected to the exhaust ends of the first exhaust branch pipe and the second exhaust branch pipe, the air inlet end of the second fan is connected to a second exhaust pipe, the exhaust end of the second exhaust pipe is connected to the exhaust ends of the third exhaust branch pipe and the fourth exhaust branch pipe.

[0018] Preferably, arc-shaped bends are respectively arranged at the corners of the first exhaust pipe and the second exhaust pipe; the arrangement of the arc-shaped bends greatly reduces the generation of swirl flow, thereby preventing the pole piece from vigorous shaking during drying.

[0019] Preferably, the inclination angle of the blades in the shutter structure at the bottom end of the inner cavity of the first drying duct, the second drying duct, the third drying duct and the fourth drying duct is 45°.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The drying device involved in the present invention is provided with four groups of drying pipes, and the four groups of drying pipes are all arranged vertically, so that the structure of the entire drying device is relatively compact, and the floor space is reduced; at the same time, the production efficiency of drying the electrode is greatly increased.

[0022] 2. The corners of the connecting pipes used in the drying device involved in the present invention are respectively arranged to be arc-shaped bend structures, thereby avoiding the generation of vortices at the corners of the pipes, ensuring the smooth flow of the airflow, and achieving the effect of preventing the electrode from being broken and damaged due to severe shaking; at the same time, the pressure loss during the circulation of hot air is reduced, so that the energy consumption of the fan is reduced; in addition, the heat distribution in the drying pipe is uniform, thereby improving the qualified rate of the electrode drying process.

[0023] 3. The air inlet end of the drying duct involved in the present invention is provided with a shutter structure, so that the flow direction of the hot air is inclined, which is beneficial to the uniform drying of the electrode surface and the stable operation of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall main structure of the present invention.

[0026] In the figure: 1-first drying furnace; 11-first drying duct; 2-second drying furnace; 21-second drying duct; 3-third drying furnace; 31-third drying duct; 4-fourth drying furnace; 41-fourth drying duct; 5-first heat exchanger; 51-first air supply pipe; 511-first air supply branch pipe; 512-second air supply branch pipe; 6-second heat exchanger; 61-second air supply pipe; 611-third air supply branch pipe; 612-fourth air supply branch pipe; 7-first fan; 71-first exhaust pipe; 711-first exhaust branch pipe; 712-second exhaust branch pipe; 8-second fan; 81-second exhaust pipe; 811-third exhaust branch pipe; 812-fourth exhaust branch pipe; 9-top box body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-2 The present invention provides a technical solution, a drying device for producing positive electrode sheets of a battery, comprising a first drying furnace 1, the exhaust end of the first drying furnace 1 is connected to a first drying pipe 11, the air inlet end of the first drying furnace 1 is connected to a first heat exchanger 5, the air inlet end of the first heat exchanger 5 is connected to a first fan 7, the air inlet end of the first fan 7 is connected to the other end of the first drying pipe 11, and also comprises a second drying furnace 2, a third drying furnace 3, a fourth drying furnace 4, a second heat exchanger 6 and a second fan 8, the exhaust ends of the second drying furnace 2, the third drying furnace 3 and the fourth drying furnace 4 are respectively connected to a second drying pipe 21, a third drying pipe 31 and a fourth drying pipe 41, the first drying pipe 11, the second drying pipe 21, the third drying pipe 31 and the fourth drying pipe 41 are respectively arranged in a vertical direction, and the air inlet end of the second heat exchanger 6 is connected to the exhaust end of the second fan 8;

[0029] The air inlet ends of the first drying furnace 1, the second drying furnace 2, the third drying furnace 3 and the fourth drying furnace 4 are respectively connected with the first air supply branch pipe 511, the second air supply branch pipe 512, the third air supply branch pipe 611 and the fourth air supply branch pipe 612;

[0030] The top ends of the first drying duct 11, the second drying duct 21, the third drying duct 31 and the fourth drying duct 41 are respectively connected to the top box bodies 9, and the air inlet ends of the first exhaust branch pipe 711, the second exhaust branch pipe 712, the third exhaust branch pipe 811 and the fourth exhaust branch pipe 812 are respectively connected to the top box bodies 9 corresponding to the first drying duct 11, the second drying duct 21, the third drying duct 31 and the fourth drying duct 41;

[0031] The exhaust end of the first heat exchanger 5 is connected to the first air supply pipe 51, and the exhaust end of the first air supply pipe 51 is connected to the air inlet ends of the first air supply branch pipe 511 and the second air supply branch pipe 512. The exhaust end of the second heat exchanger 6 is connected to the second air supply pipe 61, and the exhaust end of the second air supply pipe 61 is connected to the air inlet ends of the third air supply branch pipe 611 and the fourth air supply branch pipe 612.

[0032] The air inlet end of the first fan 7 is connected to the first exhaust pipe 71, and the air inlet end of the first exhaust pipe 71 is connected to the exhaust ends of the first exhaust branch pipe 711 and the second exhaust branch pipe 712. The air inlet end of the second fan 8 is connected to the second exhaust pipe 81, and the exhaust end of the second exhaust pipe 81 is connected to the exhaust ends of the third exhaust branch pipe 811 and the fourth exhaust branch pipe 812.

[0033] The first air supply pipe 51, the second air supply pipe 61, the first exhaust pipe 71 and the second exhaust pipe 81, the first air supply branch pipe 511, the second air supply branch pipe 512, the third air supply branch pipe 611, the fourth air supply branch pipe 612, the first exhaust branch pipe 711, the second exhaust branch pipe 712, the third exhaust branch pipe 811 and the fourth exhaust branch pipe 812 are respectively provided with arc bends at the corners; when in use, the air flow is prevented from generating vortices at the corners of the pipes, thereby ensuring the smooth flow of the air flow and achieving the effect of preventing the electrode from being broken and damaged due to severe shaking; at the same time, the pressure loss during the circulation of hot air is reduced, so that the energy consumption of the fan is reduced; in addition, the heat distribution in the first drying pipe 11, the second drying pipe 21, the third drying pipe 31 and the fourth drying pipe 41 is further uniform, thereby improving the qualified rate of the electrode drying processing.

[0034] The bottom ends of the inner cavities of the first drying duct 11, the second drying duct 21, the third drying duct 31 and the fourth drying duct 41 are respectively provided with shutter structures in the horizontal direction, and the inclination angle of the blades in the shutter structures is 45°; when in use, the hot air flowing through the shutter structures enters the corresponding drying ducts at the optimal inclination angle, which is beneficial to the uniform drying of the electrode surface and the stable operation of the electrode in the drying duct.

[0035] Working principle: When in use, the hot air generated by the first drying furnace 1, the second drying furnace 2, the third drying furnace 3 and the fourth drying furnace 4 heats and dries the electrodes placed in the first drying pipe 11, the second drying pipe 21, the third drying pipe 31 and the fourth drying pipe 41 respectively, wherein when the hot air enters the corresponding drying pipe, it passes through the shutter structure arranged at the air inlet end, so that the flow direction of the hot air is inclined, which is beneficial to the uniform drying of the electrode surface and the stable operation of the electrode; the hot air dries the electrode in the first drying pipe 11, the second drying pipe 21, the third drying pipe 31 and the fourth drying pipe 41 respectively through the corresponding top box body 9 into the first exhaust branch pipe 711, the second exhaust branch pipe 712, the third exhaust branch pipe 811 and the fourth exhaust branch pipe 812; the first exhaust branch pipe 711 and the second exhaust branch pipe 712 are connected to the first exhaust branch pipe 711 and the second exhaust branch pipe 712. The airflow in 12 is discharged to the first heat exchanger 5 through the first exhaust pipe 71 and the first fan 7, and the airflow in the third exhaust branch pipe 811 and the fourth exhaust branch pipe 812 is discharged to the second heat exchanger 6 through the second exhaust pipe 81 and the second fan 8; the airflow flows from the exhaust end of the first heat exchanger 5 through the first air supply pipe 51 and then enters the first drying furnace 1 and the second drying furnace 2 through the first air supply branch pipe 511 and the second air supply branch pipe 512 respectively, and the airflow at the exhaust end of the second heat exchanger 6 flows through the second air supply pipe 61 and then enters the third drying furnace 3 and the fourth drying furnace 4 through the third air supply branch pipe 611 and the fourth air supply branch pipe 612 respectively, thereby forming a circulating flow of airflow; wherein, the first fan 7 and the second fan 8 provide power for the circulating flow of airflow; the first heat exchanger 5 and the second heat exchanger 6 are respectively used for heat exchange of the circulating airflow.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drying device for producing positive electrode sheets of a battery, comprising a first drying furnace (1), the exhaust end of the first drying furnace (1) is connected to a first drying pipe (11), the air inlet end of the first drying furnace (1) is connected to a first heat exchanger (5), the air inlet end of the first heat exchanger (5) is connected to a first fan (7), the air inlet end of the first fan (7) is connected to the other end of the first drying pipe (11), characterized in that: Also includes: A second drying furnace (2); A third drying furnace (3); Fourth drying furnace (4); The second heat exchanger (6) and a second fan (8), the exhaust ends of the second drying furnace (2), the third drying furnace (3) and the fourth drying furnace (4) are respectively connected to the second drying duct (21), the third drying duct (31) and the fourth drying duct (41), and the first drying duct (11), the second drying duct (21), the third drying duct (31) and the fourth drying duct (41) are respectively arranged in a vertical direction; The air inlet ends of the first drying furnace (1), the second drying furnace (2), the third drying furnace (3) and the fourth drying furnace (4) are respectively connected to the first air supply branch pipe (511), the second air supply branch pipe (512), the third air supply branch pipe (611) and the fourth air supply branch pipe (612); The exhaust end of the first heat exchanger (5) is connected to the intake ends of the first gas supply branch pipe (511) and the second gas supply branch pipe (512) respectively; The exhaust end of the second heat exchanger (6) is connected to the air inlet ends of the third air supply branch pipe (611) and the fourth air supply branch pipe (612) respectively; The air inlet end of the second heat exchanger (6) is connected to the air outlet end of the second fan (8); The exhaust ends of the first drying duct (11), the second drying duct (21), the third drying duct (31) and the fourth drying duct (41) are respectively connected to a first exhaust branch pipe (711), a second exhaust branch pipe (712), a third exhaust branch pipe (811) and a fourth exhaust branch pipe (812); The air inlet end of the first fan (7) is connected to the exhaust ends of the first exhaust branch pipe (711) and the second exhaust branch pipe (712), and the air inlet end of the second fan (8) is connected to the exhaust ends of the third exhaust branch pipe (811) and the fourth exhaust branch pipe (812); The first gas supply branch pipe (511), the second gas supply branch pipe (512), the third gas supply branch pipe (611), the fourth gas supply branch pipe (612), the first exhaust branch pipe (711), the second exhaust branch pipe (712), the third exhaust branch pipe (811) and the fourth exhaust branch pipe (812) are respectively provided with arc-shaped bends at their corners; The bottom ends of the inner cavities of the first drying duct (11), the second drying duct (21), the third drying duct (31) and the fourth drying duct (41) are respectively provided with shutter structures in the horizontal direction, and the inclination angle of the blades in the shutter structures is 30 to 60 degrees.

2. A drying device for producing positive electrode sheets of batteries according to claim 1, characterized in that: The top ends of the first drying duct (11), the second drying duct (21), the third drying duct (31) and the fourth drying duct (41) are respectively connected to a top box body (9); the air inlet ends of the first exhaust branch pipe (711), the second exhaust branch pipe (712), the third exhaust branch pipe (811) and the fourth exhaust branch pipe (812) are respectively connected to the top box bodies (9) corresponding to the first drying duct (11), the second drying duct (21), the third drying duct (31) and the fourth drying duct (41).

3. A drying device for producing positive electrode sheets of batteries according to claim 1, characterized in that: The exhaust end of the first heat exchanger (5) is connected to a first air supply pipe (51), and the exhaust end of the first air supply pipe (51) is connected to the air inlet ends of the first air supply branch pipe (511) and the second air supply branch pipe (512); the exhaust end of the second heat exchanger (6) is connected to a second air supply pipe (61), and the exhaust end of the second air supply pipe (61) is connected to the air inlet ends of the third air supply branch pipe (611) and the fourth air supply branch pipe (612).

4. A drying device for producing positive electrode sheets of batteries according to claim 3, characterized in that: Arc-shaped bends are respectively arranged at the corners of the first air supply pipe (51) and the second air supply pipe (61).

5. A drying device for producing positive electrode sheets of batteries according to claim 1, characterized in that: The air inlet end of the first fan (7) is connected to a first exhaust pipe (71), and the air inlet end of the first exhaust pipe (71) is connected to the exhaust ends of the first exhaust branch pipe (711) and the second exhaust branch pipe (712); the air inlet end of the second fan (8) is connected to a second exhaust pipe (81), and the exhaust end of the second exhaust pipe (81) is connected to the exhaust ends of the third exhaust branch pipe (811) and the fourth exhaust branch pipe (812).

6. A drying device for producing positive electrode sheets of batteries according to claim 5, characterized in that: Arc-shaped bends are respectively arranged at the corners of the first exhaust pipe (71) and the second exhaust pipe (81).

7. A drying device for producing positive electrode sheets of batteries according to claim 1, characterized in that: The inclination angle of the blades in the shutter structure at the bottom end of the inner cavity of the first drying duct (11), the second drying duct (21), the third drying duct (31) and the fourth drying duct (41) is 45°.

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