Horizontal pulling, extracting and clamping device for wet diaphragm of lithium battery

Abstract

The utility model discloses a lithium battery wet diaphragm transverse-pulling extraction clamping device, which comprises a clamping part used for clamping a diaphragm to stabilize the width of the diaphragm, the clamping part comprises a first compression roller and a second compression roller, and the diaphragm is compressed by the first compression roller and the second compression roller; and the clamping part position adjusting assembly is connected to the clamping part, the clamping part position adjusting assembly comprises a guide column, and the clamping part is arranged on the guide column and can move along the guide column so as to adjust the position of the clamping part on the guide column. According to the diaphragm clamping device, the diaphragm is clamped through the edges of the two sides to stabilize the width, so that the traction stability of a driving roller in a production line is guaranteed in an auxiliary mode.

Description

Technical Field

[0001] The utility model relates to the field of diaphragm horizontal pulling extraction clamping devices; further, it relates to a clamping device used for lithium battery wet diaphragm horizontal pulling extraction. Background Art

[0002] In recent years, lithium batteries have played an increasingly important role in people's lives. They are used in mobile phones, various electronic products, new-powered cars, etc. that can be seen everywhere. In the structure of lithium batteries, the diaphragm is one of the key internal components. Its main function is to separate the positive and negative electrodes of the battery, ensuring the passage of lithium ions while hindering the transmission of electrons. It is a thin film with a microporous structure that has the function of preventing the battery from overheating. The performance of the diaphragm determines the interface structure and internal resistance of the battery, and affects the capacity and cycle of the battery.

[0003] According to the manufacturing process of diaphragms, they can be mainly divided into dry diaphragms, wet diaphragms and coated diaphragms. Among them, the wet process uses the principle of thermally induced phase separation to mix plasticizers (hydrocarbon liquids with high boiling points or some substances with relatively low molecular weight) with polyolefin resins, and uses the solid-liquid phase or liquid-liquid phase separation phenomenon that occurs during the cooling of the molten mixture to press the membrane, heat it to a temperature close to the melting point, and then stretch it longitudinally and transversely to make the molecular chains oriented in the same direction. After keeping the temperature for a certain period of time, the extraction process begins, and the plasticizer is extracted from the film with a volatile solvent (such as dichloromethane and trichloroethylene).

[0004] However, during the diaphragm extraction process, a driving roller is required to ensure the stability of the diaphragm extraction. Due to the thermal shrinkage of the diaphragm, the diaphragm still shrinks during the extraction process, so it is obviously not enough to ensure the stability of the traction by the driving roller. In order to ensure the normal width of the diaphragm during extraction and the stability of the traction, it is necessary to design a matching auxiliary device to cooperate with the stable traction solution of the driving roller. Utility Model Content

[0005] After many attempts to overcome the defects of the prior art, the utility model provides a lithium battery wet diaphragm horizontal pulling extraction clamping device, which stabilizes the width by clamping the diaphragm at the edges on both sides to assist the driving roller in ensuring the traction stability of the diaphragm clamping device in the production line.

[0006] To achieve the above-mentioned purpose, a technical solution of the utility model is a lithium battery wet-process diaphragm horizontal pulling extraction clamping device, characterized in that it includes: a clamping part, used to clamp the diaphragm to stabilize the width of the diaphragm, wherein the clamping part includes a first pressing roller and a second pressing roller, and the diaphragm is pressed by the first pressing roller and the second pressing roller; and a clamping part position adjustment component, connected to the clamping part, wherein the clamping part position adjustment component includes a guide column, the clamping part is arranged on the guide column and the clamping part can move along the guide column to adjust the position of the clamping part on the guide column.

[0007] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the first pressing roller is larger than the second pressing roller.

[0008] The lithium battery wet-process diaphragm horizontal pulling extraction clamping device as described above, wherein the clamping part includes: a first pressing roller frame, wherein the first pressing roller is installed on the first pressing roller frame through a first pressing roller shaft; a second pressing roller frame, which can be swingably arranged relative to the first pressing roller frame, wherein the second pressing roller is installed on the second pressing roller frame through a second pressing roller shaft, and the second pressing roller frame is swingably arranged to different positions relative to the first pressing roller frame, so that the first pressing roller surface can be arranged parallel to the second pressing roller or the first pressing roller can be arranged away from the second pressing roller; and a tension spring connected to the second pressing roller frame, wherein the tension spring is used to pull the second pressing roller to be arranged parallel to the first pressing roller.

[0009] The lithium battery wet diaphragm horizontal pulling extraction clamping device as described above, wherein the clamping part includes: a swing arm shaft, which is arranged on the first pressure roller frame; and a connecting plate, which connects the swing arm shaft and the second pressure roller frame, wherein the second pressure roller frame can be swung relative to the first pressure roller frame through the swing arm shaft, and the tension spring is arranged on the connecting plate, so that the second pressure roller is pulled to face the first pressure roller to be arranged in parallel.

[0010] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the clamping part includes an axle seat, the guide column is penetrated through the axle seat, and one end of the tension spring is connected to the first pressure roller frame or the axle seat.

[0011] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the clamping portion further includes a retaining spring disposed on the swing arm shaft.

[0012] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the clamping part further comprises a rotating shaft connecting the connecting plate and the second pressing roller frame, wherein the rotating shaft is used to pivotally connect the second pressing roller frame to the connecting plate.

[0013] As described above, in the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, the clamping portion further comprises an axle seat, and the guide column is penetrated in the axle seat.

[0014] The lithium battery wet-process diaphragm horizontal pulling extraction clamping device as described above further comprises a mounting portion connected to the clamping portion position adjustment component.

[0015] As described above, the lithium battery wet diaphragm horizontal pulling extraction clamping device, wherein the mounting part includes: a mounting plate; a beam, which is arranged on the mounting plate; and a mounting seat, which is arranged on the beam, wherein the guide column of the clamping part position adjustment component is connected to the mounting seat.

[0016] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the clamping part position adjustment component further comprises a screw rod, wherein the screw rod and the guide column are arranged parallel to each other, and the clamping part is arranged on the screw rod.

[0017] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the clamping part position adjustment component further includes a hand wheel connected to the screw rod, wherein the rotation of the hand wheel can drive the screw rod to rotate, thereby causing the clamping part to move along the guide column.

[0018] As described above, in the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, the clamping part position adjustment component comprises a shaft seat, and the screw rod is penetrated in the shaft seat.

[0019] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the clamping part position adjustment component further includes a screw nut, which is arranged on the shaft seat, wherein the screw is inserted into the screw nut on the shaft seat.

[0020] As described above, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device, wherein the clamping part position adjustment component further includes a position display, which can calculate the moving distance according to the screw pitch.

[0021] The technical solution provided by the utility model can achieve technical effects that the existing technology cannot achieve, and solves the problem that the existing technology can no longer meet the requirement of ensuring traction stability through the operation of its own driving roller. Due to the biaxial stretching of the process and the thermal shrinkage characteristics of the diaphragm, the diaphragm still shrinks during the extraction process. It is obviously not enough to rely solely on the roller to pull the trajectory direction of the diaphragm. Therefore, the clamping device disclosed by the utility model can effectively assist the driving roller to ensure the stability of traction in the production line. It stabilizes the width by clamping the diaphragm on the edges on both sides to achieve a more favorable production effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1The utility model is a schematic diagram showing the appearance of a lithium battery wet-process diaphragm horizontal pulling extraction clamping device.

[0023] Figure 2 The utility model is a schematic diagram showing the appearance of a part of the lithium battery wet-process diaphragm horizontal pulling extraction clamping device provided by the utility model.

[0024] Figure 3 The utility model is a schematic diagram showing the appearance of a part of the lithium battery wet-process diaphragm horizontal pulling extraction clamping device in another direction.

[0025] Figure 4 The utility model is a schematic diagram showing the appearance of the lithium battery wet-process diaphragm horizontal pulling extraction clamping device during actual operation. DETAILED DESCRIPTION

[0026] The technical solution provided by the utility model is a lithium battery wet-process diaphragm horizontal pulling extraction clamping device 1, please refer to Figure 1 and Figure 4 , which shows the left half of the entire clamping device, and the right part is completely symmetrical with the left part. The diaphragm clamping device 1 is mainly composed of a clamping part 2 and a clamping part position adjustment component 3, wherein the clamping part position adjustment component 3 may include a hand wheel 33, a screw rod 32 and a guide column 31, etc., wherein the connection process of each part mainly includes carbon dioxide shielded welding and threaded fixing, which not only reduces the difficulty of assembly, but also reduces the processing cost.

[0027] In this example, see Figure 1 and Figure 2 The clamping part 2 is used for clamping the diaphragm F to stabilize the width of the diaphragm F, wherein the clamping part 2 includes a first pressing roller 21 and a second pressing roller 22, and the diaphragm F is pressed by the first pressing roller 21 and the second pressing roller 22; the clamping part position adjustment component 3 is connected to the clamping part 2, wherein the clamping part position adjustment component 3 includes a guide column 31, the clamping part 2 is arranged on the guide column 31 and the clamping part 2 can move along the guide column 31 to adjust the position of the clamping part 2 on the guide column 31.

[0028] In some embodiments, please refer to Figure 3 The first pressing roller 21 is larger than the second pressing roller 22, that is, the diameter of the first pressing roller 21 is larger than the second pressing roller 22, so that the process of clamping the diaphragm F is more stable. However, it is not limited to this, and the first pressing roller 21 can also be longer than the second pressing roller 22 to achieve this.

[0029] See also Figure 1 , Figure 2 and Figure 3In some embodiments, the clamping portion 2 includes a first pressure roller frame 211, wherein the first pressure roller 21 is installed on the first pressure roller frame 211 through a first pressure roller shaft 210; a second pressure roller frame 222, which can be swung relative to the first pressure roller frame 211, wherein the second pressure roller 22 is installed on the second pressure roller frame 222 through a second pressure roller shaft 221, and the second pressure roller frame 222 is swung relative to the first pressure roller frame 211 to different positions, so that the first pressure roller 21 can be arranged parallel to the second pressure roller 22 or the first pressure roller 21 can be arranged away from the second pressure roller 22; and a tension spring 23, connected to the second pressure roller frame 222, wherein the tension spring 23 is used to pull the second pressure roller 22 to be arranged parallel to the first pressure roller 21.

[0030] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3 The clamping part 2 includes: a swing arm shaft 24, which is arranged on the first roller frame 211; and a connecting plate 25, which connects the swing arm shaft 24 and the second roller frame 222, wherein the second roller frame 222 can be swingably arranged relative to the first roller frame 211 through the swing arm shaft 24, and the tension spring 23 is arranged on the connecting plate 25, so that the second roller 22 is pulled to face the first roller 21 to be arranged in parallel. The clamping part 2 includes an axle seat 26, and the guide column 30 is inserted into the axle seat 26, and one end of the tension spring 23 is connected to the first roller frame 211 or the axle seat 26. In addition, the clamping part 2 further includes a clamping spring 27, which is arranged on the swing arm shaft 24 to prevent axial movement. A rotating shaft 2221 is disposed on the second roller frame 222, and the rotating shaft 2221 is connected to the connecting plate 25, so that the second roller frame 222 can rotate relative to the connecting plate 25 through the rotating shaft 2221. In addition, a blocking piece 261 is also disposed on the shaft seat 26.

[0031] Please continue reading Figure 1 and Figure 2In some embodiments, the lithium battery wet-process diaphragm horizontal pulling extraction clamping device 1 further includes a mounting portion 4 connected to the clamping portion position adjustment assembly 3, wherein the mounting portion 4 includes: a mounting plate 41; a crossbeam 42, disposed on the mounting plate 41; and a mounting seat 43, disposed on the crossbeam 42, wherein the guide column 31 of the clamping portion position adjustment assembly 3 is connected to the mounting seat 43. In addition, a sealing gasket 411 and a connecting member 412 surrounded by the sealing gasket 411 are provided on the mounting plate 41, and the connecting member 412 is connected to the crossbeam 42. The clamping portion position adjustment assembly 3 further includes a screw rod 32, wherein the screw rod 32 and the guide column 31 are arranged in parallel and opposite to each other, and the clamping portion 2 is also arranged on the screw rod 32. It further includes a hand wheel 33 connected to the screw rod 32, wherein the rotation of the hand wheel 33 can drive the screw rod 32 to rotate, thereby moving the clamping portion 2 along the guide column 31. The clamping part 2 includes a shaft seat 26, and the screw rod 32 and the guide column 31 are inserted into the shaft seat 26. The clamping part 2 further includes a screw nut 262 disposed on the shaft seat 26, wherein the screw rod 32 is inserted into the screw nut 262 on the shaft seat 26. In some embodiments, please continue to refer to Figure 1 The screw rod 32 is arranged on the mounting seat 43 through a washer 321 and a sliding bearing 322 .

[0032] During operation, the mounting plates 41 on both sides need to be fixedly connected to the panels B on both ends of the extraction tank (not shown). Figure 4 , which is usually installed below the driving roller (not shown) so that the diaphragm F can sag to the driving roller after being pressed against it. Figure 2 The membrane F passes between the first and second rollers 21 and 22 on the left and right sides. Before passing through, the left and right offset hand wheels 33 need to be rotated manually to move the clamping part 2 on the screw rod 32 to the edges of the two sides of the membrane F. At the same time, the second rollers 22 are manually opened, and the membrane F passes through the second rollers 22. The second rollers 22 and the first rollers 21 press the membrane F tightly through the tension of the tension spring 23. The clamping part position adjustment assembly 3 includes a position indicator 34 and a clamping plate 341 for the indicator. Please refer to Figure 1 The position display 34 is also called a counter, which can calculate the moving distance according to the pitch of the screw rod 32, and the feed amount can be directly read through the position display 34. It has the characteristics of easy reading and accurate reading, no noise, long service life, and is more convenient, practical, and cost-saving than a dial handwheel.

[0033] Figure 2 The main parts of the lithium battery wet-process diaphragm horizontal pulling extraction clamping device 1 are shown, which mainly include the shaft seat 26 that moves left and right on the crossbeam 32, the tension spring 23 that provides the clamping force, the first pressure roller 21 and the second pressure roller 22 that compress the diaphragm F, and the tension spring 23 that provides the pressure. Figure 2 and Figure 3It can be seen that only the second roller frame 222 configured by the second roller 22 is provided with a rotating shaft 2221, and the rotating shaft 2221 is inserted into the groove at the bottom of the connecting plate 25, and the second roller frame 222 is pivotally connected to the connecting plate 25 through the rotating shaft 2221. When the diaphragm F passes through the first roller 21 and the second roller 22, the second roller 22 can adjust the rotation angle within a small range under the traction of the rotating shaft 2221, which is more conducive to the pressing and fitting of the diaphragm F.

[0034] In summary, the utility model discloses a diaphragm clamping device that assists the driving roller in ensuring traction stability in the production line, and stabilizes the width by clamping the diaphragm at the edges on both sides. Due to the biaxial stretching of the process and the thermal shrinkage characteristics of the diaphragm, the diaphragm still shrinks during the extraction process. It is obviously not enough to rely solely on the roller to pull the trajectory direction of the diaphragm. In order to ensure that the diaphragm moves forward with a normal width during extraction and to ensure traction stability, a specific auxiliary device is required to cooperate with the driving roller to achieve a more favorable production effect. Therefore, the lithium battery wet diaphragm horizontal pulling extraction clamping device disclosed by the utility model can effectively assist the driving roller in ensuring traction stability in the production line.

[0035] However, what is described above is only a preferred embodiment of the present utility model, but it cannot be used to limit the scope of protection of the present utility model patent; therefore, any simple equivalent changes and modifications made according to the scope of protection of the present utility model patent and the contents of the specification are still within the scope of protection of the present utility model patent.

Claims

1. A lithium battery wet-process diaphragm horizontal pulling extraction clamping device, characterized in that: Include: a clamping part, used for clamping the diaphragm to stabilize the width of the diaphragm, wherein the clamping part comprises a first pressing roller and a second pressing roller, and the diaphragm is pressed by the first pressing roller and the second pressing roller; and A clamping part position adjustment component is connected to the clamping part, wherein the clamping part position adjustment component includes a guide column, the clamping part is arranged on the guide column and the clamping part can move along the guide column to adjust the position of the clamping part on the guide column.

2. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 1 is characterized in that: The first pressing roller is larger than the second pressing roller.

3. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 1 is characterized in that: The clamping portion comprises: A first pressing roller frame, wherein the first pressing roller is installed on the first pressing roller frame through a first pressing roller shaft; a second roller frame that can be swung relative to the first roller frame, wherein the second roller is mounted on the second roller frame via a second roller shaft, and the second roller frame can be swung relative to the first roller frame to different positions, so that the first roller surface can be arranged parallel to the second roller or the first roller can be arranged away from the second roller; and A tension spring is connected to the second pressing roller frame, wherein the tension spring is used to pull the second pressing roller to be parallel to the first pressing roller.

4. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 3 is characterized in that: The clamping portion comprises: A swing arm shaft, disposed on the first pressure roller frame; and A connecting plate connects the swing arm shaft and the second pressure roller frame, wherein the second pressure roller frame can be swung relative to the first pressure roller frame through the swing arm shaft, and the tension spring is arranged on the connecting plate to pull the second pressure roller to face the first pressure roller to be arranged in parallel.

5. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 3, characterized in that: The clamping part comprises an axle seat, the guide column is penetrated in the axle seat, and one end of the tension spring is connected to the first pressing roller frame or the axle seat.

6. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 4, characterized in that: The clamping portion further includes a clamping spring disposed on the swing arm shaft.

7. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 4, characterized in that: The clamping portion further comprises a rotating shaft connecting the connecting plate and the second pressing roller frame, wherein the rotating shaft is used to pivotally connect the second pressing roller frame to the connecting plate.

8. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 1, characterized in that: The clamping portion further comprises a shaft seat, and the guide column is penetrated in the shaft seat.

9. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 1, characterized in that: Also includes: A mounting portion is connected to the clamping portion position adjustment assembly.

10. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 9, characterized in that: The installation section includes: a mounting plate; a crossbeam disposed on the mounting plate; and A mounting seat is arranged on the crossbeam, wherein the guide column of the clamping portion position adjustment assembly is connected to the mounting seat.

11. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 1, characterized in that: The clamping portion position adjustment assembly further comprises: A screw rod, wherein the screw rod and the guide column are arranged parallel to each other, and the clamping part is arranged on the screw rod.

12. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 11, characterized in that: The clamping portion position adjustment assembly further comprises: A hand wheel is connected to the screw rod, wherein the rotation of the hand wheel can drive the screw rod to rotate, thereby causing the clamping part to move along the guide column.

13. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 11, characterized in that: The clamping part position adjustment component comprises a shaft seat, and the screw rod is penetrated in the shaft seat.

14. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 13, characterized in that: The clamping portion position adjustment assembly further comprises a screw nut disposed on the shaft seat, wherein the screw is inserted into the screw nut on the shaft seat.

15. The lithium battery wet-process diaphragm horizontal pulling extraction clamping device according to claim 11, characterized in that: The clamping portion position adjustment assembly further includes a position display, which can calculate the moving distance according to the screw pitch of the lead screw.

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