Adjustable lithium battery diaphragm casting piece cooling control device

Abstract

The utility model discloses an adjustable lithium battery diaphragm casting piece cooling control device which comprises a wall plate, a die head connected to the wall plate, a cold roller rotationally connected to the wall plate through a rotating shaft, a swing arm frame rotationally connected to the rotating shaft, a second guide roller and an adjusting air cylinder connected to the swing arm frame, and a stripping roller rotationally connected to the telescopic end of the adjusting air cylinder. A second gear is connected to the swing arm frame, a first gear is connected to the rotating shaft, a motor is slidably connected to the wall plate, a transmission gear is connected to the output end of the motor, a connecting frame is connected to one side of the wall plate, a connecting column is connected to the connecting frame, a first guide roller is rotationally connected to the connecting column, and a fixing base is connected to the motor. According to the utility model, a rotatable swing arm frame structure is adopted, and the collected stripping roller can rotate at a certain angle around the cold roller, so that the cooling time of a diaphragm casting piece can be controlled, the diaphragm casting pieces containing different contents of beta-crystals are processed, and different production requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery diaphragm casting sheets, in particular to an adjustable lithium battery diaphragm casting sheet cooling control device. Background Art

[0002] The pore formation mechanism of BOPP microporous film is the transformation of polypropylene crystals into pores: a certain amount of β-crystal nucleating agent is added to polypropylene, and the formula raw materials are melted and plasticized by the extruder, and then extruded from the die, and a casting sheet containing a large amount of β-crystals is generated during the rapid cooling process. During the longitudinal stretching of the casting sheet, the β-crystals are transformed into α-crystals under the action of low temperature and tension, and at the same time, the loose interface between the β-crystals and the amorphous phase will produce gaps, namely micropores. During the transverse stretching process, the micropores grow and expand, and finally a multi-microporous, low-density polypropylene microporous film is prepared.

[0003] After polypropylene is extruded from the die, a large amount of β-crystals will be generated in the casting during the rapid cooling process to form a casting sheet. The content, size and distribution of β-crystals in the casting sheet will directly affect the efficiency and consistency of the conversion of β-crystals to α-crystals in the casting sheet, thereby affecting the size and uniformity of the voids in the polypropylene bilayer lithium battery separator.

[0004] The time that the casting sheet stays on the casting roller (for casting sheet cooling) directly affects the amount, size and distribution of β-crystals in the casting sheet. Therefore, lithium battery separator products with different gap requirements have different requirements for the time that the casting sheet stays on the casting roller (40-120 seconds). At present, the lithium battery separator production line mainly controls the time that the casting sheet stays by adjusting the position of the stripping roller on the casting roller. The main disadvantages are: the stripping roller device structure commonly used in the lithium battery separator production line is an integral and non-detachable type. The stripping roller position replacement and maintenance must remove the stripping roller arms on both sides as a whole. 1. The device is in the middle position of the casting roller. When it is fixed, there is little space available for fixing, and the stability is poor after fixing; 2. The structure is surrounded by mirror rollers. Any slight bump will cause serious damage to the production equipment, and the risk factor is high during the disassembly process; 3. When disassembling, the casting roller needs to be wrapped with sponge and soft cloth to prevent oil pollution from polluting the equipment. The process is complicated, time-consuming and inefficient.

[0005] Based on this, an adjustable cooling control device for lithium battery diaphragm casting is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems and to propose an adjustable cooling control device for lithium battery diaphragm casting.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An adjustable lithium battery diaphragm casting sheet cooling control device comprises a wall panel, a die head is connected to the wall panel, the wall panel is rotatably connected to a cold roller via a rotating shaft, a swing arm frame is rotatably connected to the rotating shaft, a guide roller 2 and an adjusting cylinder are connected to the swing arm frame, a stripping roller is rotatably connected to the telescopic end of the adjusting cylinder, a gear 2 is connected to the swing arm frame, a gear 1 is connected to the rotating shaft, a motor is slidably connected to the wall panel, and a transmission gear is connected to the output end of the motor.

[0009] Preferably, a connecting frame is connected to one side of the wall panel, a connecting column is connected to the connecting frame, and a guide roller is rotatably connected to the connecting column.

[0010] Preferably, the motor is connected to a fixed seat, a slide bar is connected to the lower end of the fixed seat, a slide groove is provided on the wall panel, the slide bar is slidably connected to the slide groove, and a driving member for driving the fixed seat to move horizontally is connected to the fixed seat.

[0011] Preferably, the driving member comprises a telescopic cylinder, a cylinder groove is provided on the wall panel, the telescopic cylinder is connected in the cylinder groove, and the telescopic end of the telescopic cylinder is connected to the lower end of the fixing seat.

[0012] Preferably, the fixing seat is connected to a circular hole disk via a synchronous frame, the circular hole disk is sleeved on the rotating shaft, and a clamping button is connected to the swing arm frame.

[0013] Preferably, the circular hole disk is provided with a plurality of circular holes, and the plurality of circular holes are arranged in a circular ring shape on the circular hole disk.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] 1. The present application adopts a rotatable swing arm structure, and the collected stripping roller can rotate around the cold roller at a certain angle, so the cooling time of the diaphragm casting can be controlled, thereby processing diaphragm castings containing different contents of β-crystals to meet different production needs.

[0016] 2. The present application adopts a telescopic cylinder structure, which can control the transmission gear to move between gear one and gear two to achieve different driving effects. When the transmission gear and gear one are meshed with each other, the circular hole plate can automatically limit the swing arm frame, thereby improving the firmness of the swing arm frame connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the overall structure of the cooling control device provided according to the embodiment of the utility model is shown;

[0018] Figure 2 A schematic diagram of the explosion structure of the cold roller connection provided according to an embodiment of the utility model is shown;

[0019] Figure 3 A schematic diagram of the explosion structure of the swing arm frame connection provided according to an embodiment of the utility model is shown.

[0020] Legend:

[0021] 1. Wall panel; 2. Connecting frame; 3. Connecting column; 4. Guide roller 1; 5. Cold roller; 6. Rotating shaft; 7. Die head; 8. Swing arm frame; 9. Guide roller 2; 10. Adjusting cylinder; 11. Peeling roller; 12. Motor; 13. Cylinder groove; 14. Slide; 15. Gear 1; 16. Gear 2; 17. Fixed seat; 18. Synchronous frame; 19. Round hole plate; 20. Telescopic cylinder; 21. Snap-on button; 22. Transmission gear; 23. Slide. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0024] An adjustable lithium battery diaphragm casting sheet cooling control device includes a wall panel 1, a die head 7 is connected to the wall panel 1, the wall panel 1 is rotatably connected to a cold roller 5 through a rotating shaft 6, a swing arm frame 8 is rotatably connected to the rotating shaft 6, a guide roller 2 9 and an adjusting cylinder 10 are connected to the swing arm frame 8, a stripping roller 11 is rotatably connected to the telescopic end of the adjusting cylinder 10, a gear 2 16 is connected to the swing arm frame 8, a gear 1 15 is connected to the rotating shaft 6, a motor 12 is slidably connected to the wall panel 1, and a transmission gear 22 is connected to the output end of the motor 12.

[0025] Specifically, Figure 1 As shown, a connecting frame 2 is connected to one side of the wall panel 1, a connecting column 3 is connected to the connecting frame 2, a guide roller 4 is rotatably connected to the connecting column 3, and the guide rollers 4 are subsequently arranged to improve the uniformity of the casting forming, wherein the casting is interlaced and connected between the guide rollers 4.

[0026] Specifically, Figure 2 and Figure 3As shown, the motor 12 is connected to a fixed seat 17, the lower end of the fixed seat 17 is connected to a slide bar 23, a slide groove 14 is opened on the wall panel 1, and the slide bar 23 is slidably connected to the slide groove 14. The structure of the slide bar 23 and the slide groove 14 improves the structural stability of the horizontal movement of the fixed seat 17, and the fixed seat 17 is connected to a driving member for driving the fixed seat 17 to move horizontally.

[0027] Specifically, Figure 2 and Figure 3 As shown, the driving part includes a telescopic cylinder 20, a cylinder groove 13 is opened on the wall panel 1, the telescopic cylinder 20 is connected in the cylinder groove 13, and the telescopic end of the telescopic cylinder 20 is connected to the lower end of the fixed seat 17. During the operation of the telescopic cylinder 20, the motor 12 structure must stop running, and the telescopic cylinder 20 has only two states, extension and contraction. When extended, the angle of deflection of the swing arm frame 8 can be adjusted, and when contracted, the operation transmission of the cold roller 5 can be carried out.

[0028] Specifically, Figure 3 As shown, the fixed seat 17 is connected to the round hole disk 19 through the synchronous frame 18, the round hole disk 19 is sleeved on the rotating shaft 6, and the swing arm frame 8 is connected to the clamping button 21. When the clamping button 21 is clamped on the round hole disk 19, the swing arm frame 8 cannot rotate.

[0029] Specifically, Figure 3 As shown, a plurality of circular holes are provided on the circular hole disk 19, and the plurality of circular holes are arranged in a circular ring shape on the circular hole disk 19. The number of circular holes is related to the accuracy of the deflection angle of the swing arm frame 8. The more the number, the higher the accuracy. As the number of circular holes increases, the structural strength of the circular hole disk 19 will also decrease.

[0030] In summary, the adjustable lithium battery diaphragm casting cooling control device provided in this embodiment, when lithium battery diaphragm casting processing is required, extrudes thin film raw material onto the cold roller 5 through the die head 7, so that the raw material in the molten state can be quickly cooled and formed by the low-temperature cold roller 5, and the formed thin film casting is stretched by the stripping roller 11, the guide roller 29 and the guide roller 14, so that the casting can be in a flat thin sheet state. When the swing arm frame 8 rotates to different angles, the cooling time of the raw material on the cold roller 5 is different, that is, when the stripping roller 11 is on the side away from the guide roller 14, the stripping roller 11 is located below the die head 7, and the cooling time of the casting at this position is shorter, and when the stripping roller 11 is located close to the guide roller 14, the cooling time of the casting is longer.

[0031] When it is necessary to adjust the deflection angle of the swing arm frame 8, it is only necessary to control the extension of the telescopic cylinder 20. At this time, the transmission gear 22 changes from the state of meshing with gear 1 15 to the state of meshing with gear 2 16, and then the motor 12 is controlled to rotate, thereby relying on the transmission gear 22 to drive gear 2 16 to rotate, and the swing arm frame 8 is controlled to rotate. The rotation angle of the swing arm frame 8 is limited, and it is necessary to avoid the die head 7 and the synchronous frame 18 structure, so the actual rotation angle of the swing arm frame 8 is less than 360°. After the adjustment is completed, the operator is required to stabilize the position of the swing arm frame 8, and then control the telescopic cylinder 20 to contract, so that the circular hole disk 19 is docked with the clamping button 21, thereby completing the limit of the swing arm frame 8. At this time, the transmission gear 22 and the gear 1 15 are meshed with each other. Through the cooling control device, different cooling degrees of the casting can be achieved. When the speed of the cold roller 5 remains unchanged, the cooling time of the casting can be adjusted to meet different processing requirements.

[0032] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adjustable lithium battery diaphragm casting sheet cooling control device, comprising a wall panel (1), characterized in that: The wall panel (1) is connected to a die head (7), the wall panel (1) is rotatably connected to a cold roller (5) via a rotating shaft (6), the rotating shaft (6) is rotatably connected to a swing arm frame (8), the swing arm frame (8) is connected to a second guide roller (9) and an adjusting cylinder (10), the telescopic end of the adjusting cylinder (10) is rotatably connected to a peeling roller (11), the swing arm frame (8) is connected to a second gear (16), the rotating shaft (6) is connected to a first gear (15), the wall panel (1) is slidably connected to a motor (12), and the output end of the motor (12) is connected to a transmission gear (22).

2. The adjustable lithium battery diaphragm casting cooling control device according to claim 1, characterized in that: One side of the wall panel (1) is connected to a connecting frame (2), the connecting frame (2) is connected to a connecting column (3), and the connecting column (3) is rotatably connected to a guide roller (4).

3. The adjustable lithium battery diaphragm casting cooling control device according to claim 1, characterized in that: The motor (12) is connected to a fixed seat (17), a slide bar (23) is connected to the lower end of the fixed seat (17), a slide groove (14) is provided on the wall panel (1), the slide bar (23) is slidably connected to the slide groove (14), and the fixed seat (17) is connected to a driving member for driving the fixed seat (17) to move horizontally.

4. The adjustable lithium battery diaphragm casting cooling control device according to claim 3, characterized in that: The driving member comprises a telescopic cylinder (20), a cylinder groove (13) is provided on the wall panel (1), the telescopic cylinder (20) is connected in the cylinder groove (13), and the telescopic end of the telescopic cylinder (20) is connected to the lower end of the fixing seat (17).

5. The adjustable lithium battery diaphragm casting cooling control device according to claim 3, characterized in that: The fixing seat (17) is connected to a circular hole disk (19) via a synchronous frame (18); the circular hole disk (19) is sleeved on the rotating shaft (6); and a clamping button (21) is connected to the swing arm frame (8).

6. The adjustable lithium battery diaphragm casting cooling control device according to claim 5, characterized in that: The circular hole disk (19) is provided with a plurality of circular holes, and the plurality of circular holes are arranged in a circular ring shape on the circular hole disk (19).

Images