Pole piece embossing device

Abstract

The utility model provides a pole piece embossing device, and relates to the technical field of pole piece processing. The pole piece embossing device comprises a bottom plate, a first mounting plate, a second mounting plate, a driving motor, a transmission mechanism, an embossing roller and a compression roller, the first mounting plate is movably arranged on the bottom plate, the second mounting plate is arranged on the bottom plate, the embossing roller is arranged on the first mounting plate, the compression roller is arranged on the second mounting plate, the driving motor is arranged on the bottom plate, and the transmission mechanism is arranged on the transmission mechanism. The driving motor is connected with the transmission mechanism, the transmission mechanism is connected with the first mounting plate, the driving motor is used for driving the first mounting plate and the knurling roller to move towards or away from the pressing roller through the transmission mechanism, a pole piece passes through the space between the knurling roller and the pressing roller, and high-precision and high-response-speed knurling action can be achieved.

Description

Technical Field

[0001] The present application relates to the field of electrode processing technology, and in particular to a electrode embossing device. Background Art

[0002] During the production of lithium batteries, the pole pieces are often embossed during the winding process to produce indentations on the pole pieces. The production of indentations means that concave and convex points are produced on the pole pieces, which increases the surface area and interlayer spacing of the pole pieces, can improve the misalignment of the pole tabs, and make the alignment of the battery cell pole tabs higher after winding is completed. At the same time, the increase in the surface area of ​​the pole piece means an increase in the contact area with the electrolyte, which improves the electrochemical performance of the battery cell.

[0003] In existing winding equipment, cylinders are often used as power sources to achieve electrode embossing, but their accuracy and response speed will be affected by gas pressure fluctuations. Therefore, a electrode embossing device that can achieve high precision and high response speed is needed. Utility Model Content

[0004] The purpose of the present application includes, for example, providing a pole piece embossing device that can achieve high-precision and high-response speed embossing action.

[0005] This application can be implemented as follows:

[0006] The present application provides a pole piece embossing device, which includes a base plate, a first mounting plate, a second mounting plate, a driving motor, a transmission mechanism, an embossing roller and a pressure roller. The first mounting plate is movably arranged on the base plate, the second mounting plate is arranged on the base plate, the embossing roller is arranged on the first mounting plate, the pressure roller is arranged on the second mounting plate, the driving motor is arranged on the base plate, the driving motor is connected to the transmission mechanism, and the transmission mechanism is connected to the first mounting plate. The driving motor is used to drive the first mounting plate and the embossing roller to move toward or away from the pressure roller through the transmission mechanism, and the pole piece is passed between the embossing roller and the pressure roller.

[0007] Optionally, the transmission mechanism includes a driving member and a driven member, the driving motor is connected to the driving member, the driven member is arranged on the first mounting plate, and the driving member cooperates with the driven member.

[0008] Optionally, a guide rail is provided on the base plate, and the first mounting plate is in sliding engagement with the guide rail.

[0009] Optionally, the second mounting plate is swingably disposed on the base plate, and the pole piece embossing device further includes an adjusting mechanism, which is disposed on the base plate and is used to swing the second mounting plate to adjust the parallelism between the embossing roller and the pressing roller.

[0010] Optionally, the adjustment mechanism includes a fixing plate and an adjusting bolt, the fixing plate is arranged on the base plate, and the adjusting bolt passes through the fixing plate and cooperates with the second mounting plate.

[0011] Optionally, the electrode embossing device further includes a sensor, which is disposed on the bottom plate and is used to detect the position of the embossing roller.

[0012] Optionally, the pole piece embossing device further includes two guide plates, which are arranged oppositely on the bottom plate, and are used to pass the pole piece and smooth the pole ear between the two guide plates.

[0013] Optionally, the embossing roller is rotatably arranged on the first mounting plate around its own axis, and the pressing roller is rotatably arranged on the second mounting plate around its own axis.

[0014] Optionally, bearings are provided inside the embossing roller and the pressing roller, and rotating shafts are provided on the first mounting plate and the second mounting plate. The bearings on the embossing roller cooperate with the rotating shaft on the first mounting plate, and the bearings on the pressing roller cooperate with the rotating shaft on the second mounting plate.

[0015] Optionally, a third mounting plate is provided on the base plate, the third mounting plate is perpendicular to the base plate, the drive motor is provided on the third mounting plate, and the output shaft of the drive motor passes through the third mounting plate and is coaxially connected to the active component.

[0016] The beneficial effects of the electrode embossing device of the present application include, for example: in order to achieve high-precision and high-response speed embossing action, a electrode embossing device is designed, which includes a base plate, a first mounting plate, a second mounting plate, a drive motor, a transmission mechanism, an embossing roller and a pressure roller. The first mounting plate is movably arranged on the base plate, the second mounting plate is arranged on the base plate, the embossing roller is arranged on the first mounting plate, the pressure roller is arranged on the second mounting plate, the drive motor is arranged on the base plate, the drive motor is connected to the transmission mechanism, the transmission mechanism is connected to the first mounting plate, the drive motor is used to drive the embossing roller toward or away from the pressure roller through the transmission mechanism, and the electrode is passed between the embossing roller and the pressure roller. When the pole piece passes between the embossing roller and the pressing roller, the driving motor is started, and the driving motor drives the transmission mechanism to operate, and the transmission mechanism drives the first mounting plate and the embossing roller on the first mounting plate to move toward the pressing roller until the embossing roller presses the pole piece onto the pressing roller. Since the driving motor has the advantages of high precision and high response speed compared with the cylinder, the embossing action with high precision and high response speed is achieved; after the embossing is completed, the driving motor is reversed, and at this time the transmission mechanism drives the first mounting plate and the embossing roller on the first mounting plate to move away from the pressing roller, increasing the distance between the embossing roller and the pressing roller, so that the pole piece that does not need embossing is not embossed when passing between the embossing roller and the pressing roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the first viewing angle of the electrode embossing device in an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the electrode embossing device from a second viewing angle in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram used to illustrate the direction of the pole piece in the embodiment of the present application.

[0021] Icons: 1-base plate; 11-guide rail; 12-guide plate; 13-third mounting plate; 2-first mounting plate; 3-second mounting plate; 4-drive motor; 5-transmission mechanism; 51-gear; 52-rack; 6-embossing roller; 7-pressing roller; 8-adjustment mechanism; 9-sensor; 10-pole piece. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of this application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0026] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0027] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other.

[0028] The inventors of this application have discovered that in existing winding equipment, cylinders are often used as power sources to achieve electrode embossing, but their accuracy and response speed will be affected by gas pressure fluctuations. The embodiments of this application provide a electrode embossing device, which is at least used to solve this technical problem.

[0029] Please refer to Figure 1-Figure 3The electrode embossing device provided in an embodiment of the present application includes a base plate 1, a first mounting plate 2, a second mounting plate 3, a driving motor 4, a transmission mechanism 5, an embossing roller 6 and a pressure roller 7. The first mounting plate 2 is movably arranged on the base plate 1, the second mounting plate 3 is arranged on the base plate 1, the embossing roller 6 is arranged on the first mounting plate 2, the pressure roller 7 is arranged on the second mounting plate 3, the driving motor 4 is arranged on the base plate 1, the driving motor 4 is connected to the transmission mechanism 5, and the transmission mechanism 5 is connected to the first mounting plate 2. The driving motor 4 is used to drive the first mounting plate 2 and the embossing roller 6 toward or away from the pressure roller 7 through the transmission mechanism 5, and the electrode 10 is passed between the embossing roller 6 and the pressure roller 7.

[0030] It should be pointed out that the first mounting plate 2 can move toward or away from the pressing roller 7, thereby driving the embossing roller 6 to move toward or away from the pressing roller 7; the pressing roller 7 is a rubber-coated pressing roller, and the pressing roller 7 is parallel to the embossing roller 6. When the embossing roller 6 presses the pole piece 10 against the pressing roller 7 and the pole piece 10 moves along the tape-feeding direction A, the embossing roller 6 can emboss the pole piece 10; the driving motor 4 is a high-precision motor such as a servo motor, which has high precision and response speed, and its response time can reach a level of several milliseconds to more than ten milliseconds.

[0031] When the pole piece 10 passes between the embossing roller 6 and the pressing roller 7, the drive motor 4 is started, and the drive motor 4 drives the transmission mechanism 5 to run. The transmission mechanism 5 drives the first mounting plate 2 and the embossing roller 6 on the first mounting plate 2 to move toward the pressing roller 7 until the embossing roller 6 presses the pole piece 10 on the pressing roller 7. Since the drive motor 4 has the advantages of high precision and high response speed compared with the cylinder, the embossing action with high precision and high response speed is achieved; after the embossing is completed, the drive motor 4 is reversed. At this time, the transmission mechanism 5 drives the first mounting plate 2 and the embossing roller 6 on the first mounting plate 2 to move away from the pressing roller 7, increasing the distance between the embossing roller 6 and the pressing roller 7, so that the pole piece that does not need embossing is not embossed when passing between the embossing roller 6 and the pressing roller 7.

[0032] In this embodiment, the transmission mechanism 5 includes a driving member and a driven member. The driving motor 4 is connected to the driving member. The driven member is provided on the first mounting plate 2. The driving member cooperates with the driven member.

[0033] It should be pointed out that the active part is the gear 51, the driven part is the rack 52, the output shaft of the drive motor 4 is coaxially connected to the gear 51, the rack 52 is arranged on the first mounting plate 2, and the length direction of the rack 52 is consistent with the movement direction of the embossing roller 6.

[0034] When the drive motor 4 is started, the drive motor 4 drives the gear 51 to rotate, and the gear 51 drives the rack 52 to move along its own length direction, so that the first mounting plate 2 and the embossing roller 6 on the first mounting plate 2 move closer to or away from the pressing roller 7.

[0035] In other embodiments, the transmission mechanism 5 can also be a worm gear mechanism, wherein the worm wheel is the active component and the worm is the driven component. The drive motor 4 is connected to the first mounting plate 2 through the worm gear mechanism, and can also make the first mounting plate 2 and the embossing roller 6 on the first mounting plate 2 move closer to or away from the clamping roller 7.

[0036] In this embodiment, a guide rail 11 is provided on the base plate 1 , and the first mounting plate 2 is in sliding engagement with the guide rail 11 .

[0037] It should be pointed out that the length direction of the guide rail 11 is consistent with the length direction of the rack 52, and the sliding cooperation between the first mounting plate 2 and the guide rail 11 includes: a slider is provided on the first mounting plate 2, a slide groove is provided on the guide rail 11, and the slider on the first mounting plate 2 slides with the slide groove on the guide rail 11; or, a slide groove is provided on the first mounting plate 2, a slider is provided on the guide rail 11, and the slide groove on the first mounting plate 2 slides with the slider on the guide rail 11.

[0038] By providing the guide rail 11 and making the first mounting plate 2 slide in cooperation with the guide rail 11 , the movement process of the first mounting plate 2 can be made more stable.

[0039] In this embodiment, the second mounting plate 3 is swingably arranged on the base plate 1, and the pole piece embossing device also includes an adjusting mechanism 8, which is arranged on the base plate 1, and the adjusting mechanism 8 is used to swing the second mounting plate 3 to adjust the parallelism between the embossing roller 6 and the pressing roller 7.

[0040] It should be noted that one end of the second mounting plate 3 along the length of the pressure roller 7 is rotatably mounted on the base plate 1, and the adjustment mechanism 8 is used to apply a force to the other end of the second mounting plate 3 along the length of the pressure roller 7 to swing the second mounting plate 3, thereby adjusting the parallelism between the embossing roller 6 and the pressure roller 7. After the position of the pressure roller 7 is adjusted, the position of the second mounting plate 3 is fixed with fasteners such as bolts, so that the second mounting plate 3 and the pressure roller 7 are not easily movable.

[0041] In this embodiment, the adjustment mechanism 8 includes a fixing plate and an adjusting bolt. The fixing plate is provided on the base plate 1 , and the adjusting bolt passes through the fixing plate and cooperates with the second mounting plate 3 .

[0042] In the process of adjusting the parallelism between the embossing roller 6 and the pressing roller 7, by turning the adjusting bolt, the second mounting plate 3 swings on a plane parallel to the base plate 1, and the pressing roller 7 swings synchronously with the second mounting plate 3 until there is a better parallelism between the embossing roller 6 and the pressing roller 7.

[0043] In this embodiment, the electrode embossing device further includes a sensor 9 , which is disposed on the bottom plate 1 and is used to detect the position of the embossing roller 6 .

[0044] The electrode embossing device also includes a controller, which is electrically connected to both the sensor 9 and the drive motor 4. The sensor 9 can detect the position of the embossing roller 6 and provide feedback to the controller. The controller can then adjust the embossing depth of the embossing roller 6 by controlling the torque of the drive motor 4. The sensor 9 can be a distance sensor. Furthermore, the controller can control the travel distance of the embossing roller 6 by controlling the speed of the drive motor 4, achieving precise control of the travel distance of the embossing roller 6.

[0045] In this embodiment, the electrode embossing device further includes two guide plates 12 , which are oppositely arranged on the bottom plate 1 , and are used to pass the electrode 10 and smooth the electrode tabs between the two guide plates 12 .

[0046] It should be pointed out that a through hole is provided on the base plate 1, and the pole piece 10 passes through the gap between the embossing roller 6 and the pressing roller 7, the through hole and the gap between the two guide plates 12 in the direction of tape travel. After the embossing roller 6 cooperates with the pressing roller 7 to emboss the pole piece 10, the two guide plates 12 can smooth out the wrinkles of the pole ear on the pole piece 10.

[0047] The guide piece 12 has a fixed end and a free end. The fixed end is fixed on the base plate 1, and the free end extends in the direction away from the base plate 1. The distance between the free ends of the two guide pieces 12 is greater than the distance between the fixed ends of the two guide pieces 12, so that the two guide pieces 12 can smooth out the wrinkles of the pole ear while also allowing the pole piece 10 to pass smoothly through the two guide pieces 12.

[0048] In this embodiment, the embossing roller 6 is rotatably disposed on the first mounting plate 2 around its own axis, and the pressing roller 7 is rotatably disposed on the second mounting plate 3 around its own axis.

[0049] When the embossing roller 6 presses the electrode 10 onto the pressing roller 7 and the electrode 10 moves along the tape direction A, the electrode 10 will drive the embossing roller 6 and the pressing roller 7 to rotate synchronously, thereby embossing the surface of the electrode 10, increasing the surface area and interlayer spacing of the electrode 10, making the angle between the electrode ear and the center of the winding needle smaller after winding, avoiding the electrode ear from deviating in one direction, and improving the alignment of the electrode ear. At the same time, it can enhance the contact area between the electrolyte and the electrode sheet 10, thereby improving the performance of the battery made of the electrode sheet 10.

[0050] In this embodiment, bearings are provided inside the embossing roller 6 and the pressing roller 7, and rotating shafts are provided on the first mounting plate 2 and the second mounting plate 3. The bearings on the embossing roller 6 cooperate with the rotating shaft on the first mounting plate 2, and the bearings on the pressing roller 7 cooperate with the rotating shaft on the second mounting plate 3.

[0051] By matching the bearing on the embossing roller 6 with the rotating shaft on the first mounting plate 2, and the bearing on the pressing roller 7 with the rotating shaft on the second mounting plate 3, when the embossing roller 6 presses the pole piece 10 onto the pressing roller 7, the pole piece 10 drives the embossing roller 6 and the pressing roller 7 to rotate synchronously. At this time, due to the matching of the bearing and the rotating shaft, the rotation process of the embossing roller 6 and the pressing roller 7 can be made more stable.

[0052] In this embodiment, a third mounting plate 13 is provided on the base plate 1 , and the third mounting plate 13 is perpendicular to the base plate 1 . The drive motor 4 is provided on the third mounting plate 13 , and the output shaft of the drive motor 4 passes through the third mounting plate 13 and is coaxially connected to the gear 51 .

[0053] The drive motor 4 is fixed to the third mounting plate 13 by fasteners such as bolts to ensure the stability of the drive motor 4. The output shaft of the drive motor 4 passes through the third mounting plate 13 and is coaxially connected to the gear 51. When the drive motor 4 is started, the output shaft of the drive motor 4 rotates, thereby driving the gear 51 to rotate synchronously.

[0054] To sum up, the embodiment of the present application provides a pole piece embossing device, when the pole piece 10 passes between the embossing roller 6 and the pressing roller 7, the drive motor 4 is started, the drive motor 4 drives the gear 51 to rotate, the gear 51 drives the rack 52 to move, and the rack 52 drives the first mounting plate 2 and the embossing roller 6 on the first mounting plate 2 to move toward the pressing roller 7 until the embossing roller 6 presses the pole piece 10 on the pressing roller 7. Since the drive motor 4 has the advantages of high precision and high response speed compared with the cylinder, an embossing action with high precision and high response speed is achieved; after the embossing is completed, the drive motor 4 is reversed, so that the first mounting plate 2 and the embossing roller 6 on the first mounting plate 2 move away from the pressing roller 7, increasing the distance between the embossing roller 6 and the pressing roller 7, so that the pole segment that does not need embossing is not embossed when passing between the embossing roller 6 and the pressing roller 7.

[0055] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A pole piece embossing device, characterized in that: It includes a base plate, a first mounting plate, a second mounting plate, a driving motor, a transmission mechanism, an embossing roller and a pressure roller. The first mounting plate is movably arranged on the base plate, the second mounting plate is arranged on the base plate, the embossing roller is arranged on the first mounting plate, the pressure roller is arranged on the second mounting plate, the driving motor is arranged on the base plate, the driving motor is connected to the transmission mechanism, the transmission mechanism is connected to the first mounting plate, the driving motor is used to drive the first mounting plate and the embossing roller to move toward or away from the pressure roller through the transmission mechanism, and the space between the embossing roller and the pressure roller is used to pass a pole piece.

2. The pole piece embossing device according to claim 1, characterized in that: The transmission mechanism includes an active member and a driven member, the driving motor is connected to the active member, the driven member is arranged on the first mounting plate, and the active member cooperates with the driven member.

3. The pole piece embossing device according to claim 1, characterized in that: The bottom plate is provided with a guide rail, and the first mounting plate is slidably matched with the guide rail.

4. The pole piece embossing device according to claim 1, characterized in that: The second mounting plate is swingably disposed on the base plate, and the pole piece embossing device further comprises an adjusting mechanism, which is disposed on the base plate and is used to swing the second mounting plate to adjust the parallelism between the embossing roller and the pressing roller.

5. The pole piece embossing device according to claim 4, characterized in that: The adjustment mechanism comprises a fixing plate and an adjustment bolt, wherein the fixing plate is arranged on the bottom plate, and the adjustment bolt passes through the fixing plate and cooperates with the second mounting plate.

6. The pole piece embossing device according to claim 1, characterized in that: The pole piece embossing device further comprises a sensor, which is arranged on the bottom plate and is used to detect the position of the embossing roller.

7. The pole piece embossing device according to claim 1, characterized in that: The pole piece embossing device also includes two guide plates, which are arranged on the bottom plate opposite to each other, and are used to pass the pole piece and smooth the pole ear.

8. The pole piece embossing device according to claim 1, characterized in that: The embossing roller is rotatably arranged on the first mounting plate around its own axis, and the pressing roller is rotatably arranged on the second mounting plate around its own axis.

9. The pole piece embossing device according to claim 8, characterized in that: The embossing roller and the pressing roller are both provided with bearings inside, and the first mounting plate and the second mounting plate are both provided with rotating shafts. The bearing on the embossing roller cooperates with the rotating shaft on the first mounting plate, and the bearing on the pressing roller cooperates with the rotating shaft on the second mounting plate.

10. The pole piece embossing device according to claim 2, characterized in that: A third mounting plate is arranged on the bottom plate, the third mounting plate is perpendicular to the bottom plate, the driving motor is arranged on the third mounting plate, and the output shaft of the driving motor passes through the third mounting plate and is coaxially connected with the active component.

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