Pressing machine for sodium ion battery pole piece

Abstract

The utility model discloses a pressing machine for a sodium ion battery pole piece, and belongs to the technical field of electrodes. A sodium ion battery pole piece pressing machine comprises a main frame and a pressing plate, the main frame is provided with a containing cavity and a collecting cavity which are arranged up and down, an inclined bottom plate with a penetrating opening is arranged between the containing cavity and the collecting cavity, and a hot air generator is installed in the collecting cavity. By optimizing the overall structure, the battery pole pieces can be temporarily stored after being stacked up and down in the containing cavity, a through opening is formed in the inclined bottom plate, hot air can penetrate through the inclined bottom plate from the bottom to upwards enter the containing cavity to heat and dry the bottom faces of the battery pole pieces in the containing cavity, and a heat exchanger is installed on the top face of the pressing plate. The second manifold and the first manifold are installed between the heat exchanger and the air passing pipe in series, heat of hot air is transmitted to the position of the pressing plate, the battery pole piece is pressed at the moment, supplementary extrusion can be conducted from the top face, the defect of single-side heating of the battery pole piece is overcome, and the dehydration efficiency of the battery pole piece is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrodes, and more specifically to a pressing machine for sodium ion battery pole pieces. Background Art

[0002] Because sodium-ion batteries have the advantages of high safety, strong thermal stability and excellent electrochemical performance, during the preparation of sodium-ion battery electrodes, the battery electrodes need to be coated, and qualified positive / negative electrodes are prepared after drying and pressing processes. The electrodes contain moisture inside during the pressing process, resulting in a large rebound rate of the electrodes after compression, resulting in a high unqualified rate of the electrodes after compression.

[0003] The existing electrode pressing structure heats the electrode from the bottom by blowing air before pressing. However, since only the bottom of the electrode is directly in contact with the hot air during heating, the heating is uneven, which affects the pressing quality of the electrode that is directly in contact with the hot air during subsequent pressing. In view of this, we propose a sodium ion battery electrode pressing machine. Utility Model Content

[0004] 1. Technical solution

[0005] A pressing machine for sodium ion battery pole pieces comprises a main frame and a pressing plate, wherein the main frame has a container cavity and a collecting cavity arranged up and down, an inclined bottom plate with a through opening is provided between the container cavity and the collecting cavity, a hot air generator is installed in the collecting cavity, an air duct is connected between the container cavity and the collecting cavity, a heat exchanger is installed on the top surface of the pressing plate, and a manifold 2 and a manifold 1 are installed in series between the heat exchanger and the air duct.

[0006] Preferably, two heat exchangers are provided, and the manifold 2 and the manifold 1 are used in pairs in cooperation with the heat exchanger.

[0007] Preferably, the manifold 2 and the manifold 1 are made of hoses, and threaded joints are provided at the connection positions between the manifold 2 and the manifold 1 and the heat exchanger.

[0008] Preferably, a push rack is installed at the through opening of the inclined bottom plate, the top surface of the push rack is designed to protrude from the top surface of the inclined bottom plate, and a screw module is installed at the bottom of the push rack.

[0009] Preferably, the container cavity is provided with a discharge port on the side facing the pressure plate, and the main frame is movably provided with a baffle at the upper edge of the discharge port.

[0010] Preferably, a flat plate is installed on the main frame above the pressing plate, a telescopic cylinder is installed through the middle of the flat plate, and the bottom end of the telescopic cylinder is fixedly connected to the top surface of the pressing plate.

[0011] Preferably, a guide rod is installed at the top edge of the pressure plate, and a guide sleeve matching the guide rod is installed at the corner of the flat plate.

[0012] 2. Beneficial effects:

[0013] 1. Through the optimization of the overall structure, the battery pole pieces are stacked up and down in the container cavity for temporary storage, and a through hole is opened on the inclined bottom plate, so that hot air can pass through the inclined bottom plate from the bottom into the container cavity to heat and dry the bottom surface of the internal battery pole piece. A heat exchanger is installed on the top surface of the pressing plate, and manifold 2 and manifold 1 are installed in series between the heat exchanger and the air duct to transfer the heat of the hot air to the pressing plate position. At this time, pressing the battery pole piece can supplement the extrusion from the top surface to make up for the lack of unilateral heating of the battery pole piece and further improve the dehydration efficiency of the battery pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0015] Figure 2 It is a cutaway schematic diagram of the utility model;

[0016] Figure 3 It is a cutaway schematic diagram of the overall structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the position of some structures of the utility model.

[0018] Description of the numbers in the figure:

[0019] Main frame 1; air duct 2; pressure plate 3; heat exchanger 4; telescopic cylinder 5; manifold 2 6; baffle 7; hot air generator 8; push frame 9; inclined bottom plate 10; container cavity 11; manifold 1 12; collecting cavity 13; guide rod 14. DETAILED DESCRIPTION

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] This embodiment provides a sodium ion battery electrode pressing machine, referring to Figure 1, including a main frame 1 and a pressing plate 3. The main frame 1 is formed by a fixed combination of plates and can be used for temporary storage and pressing of battery pole pieces. The position for temporarily storing battery pole pieces is in the container cavity 11 of the main frame 1. The battery pole pieces are stacked up and down in the container cavity 11 for temporary storage. An inclined bottom plate 10 is installed at the bottom of the container cavity 11, and a collecting cavity 13 is formed below the container cavity 11. Before pressing, because a hot air generator 8 is installed in the collecting cavity 13, and a through hole is opened on the inclined bottom plate 10, hot air can pass through the inclined bottom plate 10 from the bottom and enter the container cavity 11 to heat and dry the bottom surface of the internal battery pole piece. After that, the container cavity 11 faces the pressing plate 3. A discharge port is provided on one side, and the dried battery pole piece can be moved to the left through the discharge port and moved out of the container chamber 11 to the bottom of the pressing plate 3 for pressing and dehydration. In addition, an air duct 2 is connected between the container chamber 11 and the collecting chamber 13. At the same time, a heat exchanger 4 is installed on the top surface of the pressing plate 3, and the heat exchanger 4 can transfer heat. Manifold 2 6 and manifold 1 12 are installed in series between the heat exchanger 4 and the air duct 2. The upward hot air from the container chamber 11 will be collected by the air duct 2, and then the heat of the hot air will be transferred to the position of the pressing plate 3 through the position of the heat exchanger 4. At this time, by pressing the battery pole piece, additional squeezing can be performed from the top surface to make up for the lack of unilateral heating of the battery pole piece, thereby further improving the dehydration efficiency of the battery pole piece.

[0022] Reference Figure 1 A flat plate is installed on the main frame 1 above the pressing plate 3. The flat plate is located on the left side of the discharge port. After the battery electrode is moved out of the container cavity 11, it can be moved to the bottom of the flat plate. At this time, a telescopic cylinder 5 is installed through the middle of the flat plate. The bottom end of the telescopic cylinder 5 is fixedly connected to the top surface of the pressing plate 3. The telescopic cylinder 5 is extended to drive the pressing plate 3 downward to press the battery electrode, which is convenient for continuous feeding and pressing processing.

[0023] Reference Figure 1 Two heat exchangers 4 are provided, and the two heat exchangers 4 are arranged front and back to avoid the connection position of the telescopic cylinder 5 and fully cover the pressure plate 3. At the same time, the manifold 2 6 and the manifold 1 12 are used in pairs with the heat exchanger 4 to ensure that the hot air can smoothly enter the two heat exchangers 4 independently. The parallel setting ensures that the temperatures of the two heat exchangers 4 are consistent, thereby ensuring that the top surface of the battery electrode is heated evenly.

[0024] Reference Figure 4 Manifold 2 6 and manifold 1 12 are made of hoses, which can be adaptively deformed when the pressure plate 3 moves up and down to ensure smooth movement of the pressure plate 3. At the same time, threaded joints are provided at the connection positions of manifold 2 6 and manifold 12 with the heat exchanger 4. The detachable connection method can realize the rapid replacement of manifold 2 6 and manifold 12, which is convenient for the subsequent cleaning, replacement and maintenance of the heat exchanger 4 and the manifold.

[0025] Reference Figure 3The inclined bottom plate 10 is provided with a push rack 9 at the through opening. The push rack 9 is a comb-type structure, corresponding to the through opening on the inclined bottom plate 10, which can ensure the smooth left and right lateral movement of the push rack 9. Moreover, the top surface of the push rack 9 protrudes from the top surface of the inclined bottom plate 10. When the push rack 9 moves to the left, the battery pole piece at the bottom layer can be pushed to the left until it is pushed out of the container cavity 11.

[0026] A screw module is installed at the lower part of the push frame 9. The electric screw module can drive the leg armor 9 to move back and forth quickly, and can achieve stable loading and resetting. Similarly, the screw module can be replaced by other linear drive devices such as hydraulic cylinders, so as to drive the push frame 9 to move back and forth horizontally.

[0027] Reference Figure 2 A baffle 7 is movably installed at the upper edge of the main frame 1 at the discharge port. The baffle 7 is located at the upper part of the discharge port, and a rotating shaft is provided on the top of the baffle 7. The rotating shaft is designed to be parallel to the top surface of the main frame 1. A stepper motor can be installed at the rear end of the rotating shaft. The baffle 7 can be driven by the stepper motor to swing according to the thickness of the battery electrode at the discharge port, and the upper part of the discharge port can be adaptively blocked. The distance between the bottom end of the baffle 7 and the top surface of the main frame 1 is adjusted to ensure that the battery electrode can be pushed out of the discharge port in a single layer and the upper battery electrode can be blocked, thereby achieving more convenient single-layer discharge.

[0028] Reference Figure 4 A guide rod 14 is installed at the top edge of the pressing plate 3. There are four guide rods 14, which are arranged at the corners of the pressing plate 3 and are parallel to the telescopic cylinder 5. When the telescopic cylinder 5 is extended or retracted, it can cooperate with the guide sleeve installed at the corner of the flat plate to perform vertical guidance to ensure that the pressing plate 3 maintains a stable horizontal state when moving up and down, thereby stably achieving horizontal and uniform pressing of the battery electrode.

[0029] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sodium ion battery pole piece pressing machine, comprising a main frame (1) and a pressing plate (3), characterized in that: The main frame (1) has a container chamber (11) and a collecting chamber (13) arranged in an upper and lower manner; an inclined bottom plate (10) with a through opening is provided between the container chamber (11) and the collecting chamber (13); a hot air generator (8) is installed in the collecting chamber (13); an air duct (2) is connected between the container chamber (11) and the collecting chamber (13); a heat exchanger (4) is installed on the top surface of the pressure plate (3); and a manifold 2 (6) and a manifold 1 (12) are installed in series between the heat exchanger (4) and the air duct (2).

2. A sodium ion battery pole piece pressing machine according to claim 1, characterized in that: The heat exchanger (4) is provided with two, and the manifold 2 (6) and the manifold 1 (12) are used in pairs in conjunction with the heat exchanger (4).

3. A sodium ion battery pole piece pressing machine according to claim 2, characterized in that: The manifold 2 (6) and the manifold 1 (12) are made of hoses, and threaded joints are provided at the connection positions between the manifold 2 (6) and the manifold 1 (12) and the heat exchanger (4).

4. A sodium ion battery pole piece pressing machine according to claim 3, characterized in that: A push frame (9) is installed at the through opening of the inclined bottom plate (10), the top surface of the push frame (9) is designed to protrude from the top surface of the inclined bottom plate (10), and a screw rod module is installed at the bottom of the push frame (9).

5. A sodium ion battery pole piece pressing machine according to claim 4, characterized in that: The container cavity (11) is provided with a discharge port on one side facing the pressure plate (3), and a baffle (7) is movably mounted on the main frame (1) at the upper edge of the discharge port.

6. A sodium ion battery pole piece pressing machine according to claim 5, characterized in that: A flat plate is installed above the main frame (1), a telescopic cylinder (5) is installed through the middle of the flat plate, and a pressure plate (3) is fixedly installed at the bottom end of the telescopic cylinder (5).

7. A sodium ion battery pole piece pressing machine according to claim 6, characterized in that: A guide rod (14) is installed at the top edge of the pressure plate (3), and a guide sleeve matched with the guide rod (14) is installed at the corner of the flat plate.

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