Slitting center line compensation mechanism, slitting device and rolling and slitting all-in-one machine

Abstract

The utility model relates to a slitting center line compensation mechanism, a slitting device and a rolling and slitting all-in-one machine. The slitting center line compensation mechanism comprises a linear guide rail; the slitting knife base is mounted on the linear guide rail in a sliding manner; and the driving mechanism is connected with the slitting knife base, and the driving mechanism is configured to drive the slitting knife base to move along the linear guide rail by a preset offset. The driving mechanism can drive the slitting knife base to move along the linear guide rail, when the slitting knife is installed on the slitting knife base, the slitting center line compensation mechanism can drive the slitting knife to move by the preset offset in the direction of the linear guide rail, the deviation between the slitting knife and the to-be-cut position of the pole piece can be reduced, and the slitting efficiency is improved. Therefore, the adjustment amount of the deviation rectifying device on the pole piece before slitting is reduced, the pole piece is not prone to being twisted and scrapped, and the technical problem that in the related technology, the pole piece is prone to being scrapped is solved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a slitting centerline compensation mechanism, a slitting device and a roller-pressing slitting integrated machine. Background Art

[0002] In the field of new energy, secondary batteries currently occupy an important market position. Secondary batteries include lithium batteries, sodium batteries, etc., especially lithium-ion batteries. Compared with other batteries, they have outstanding advantages such as high energy density, long cycle life, low self-discharge rate, no memory effect and green environmental protection.

[0003] In the related art, in the production process of secondary batteries, a rolling and slitting machine is required to perform rolling and cutting operations on the electrode sheets. The rolling and slitting machine includes a unwinding device, a rolling device and a slitting device, and a correction device is arranged between the rolling device and the slitting device. After the electrode sheets are unrolled by the unwinding device, they are rolled up and down by the rolling device, and then the position of the electrode sheets is adjusted by the correction device in front of the slitting device, and then the electrode sheets are cut by the slitting device.

[0004] However, the correcting device achieves the material line offset of the electrode by twisting the electrode. If the center line of the slitting device deviates too much from the center line of other devices in the roller-pressing slitting machine after the slitting device switches models, it will cause the deviation between the electrode and the slitting device to be too large. At this time, only adjusting the position of the electrode by the correcting device may easily cause the electrode to be scrapped.

[0005] Therefore, it is necessary to design a slitting centerline compensation mechanism, a slitting device and a roller slitting machine to overcome the above problems. Summary of the invention

[0006] The present application provides a slitting centerline compensation mechanism, a slitting device and a roller-pressing slitting integrated machine, which can solve the technical problem in the related art that the pole piece is easily scrapped due to excessive adjustment of the pole piece position by the correction device.

[0007] In a first aspect, an embodiment of the present application provides a slitting centerline compensation mechanism, which includes: a linear guide rail; a slitting knife base, the slitting knife base being slidably mounted on the linear guide rail; a driving mechanism, the driving mechanism being connected to the slitting knife base, and the driving mechanism being configured to drive the slitting knife base to move a preset offset along the linear guide rail.

[0008] In combination with the first aspect, in one embodiment, the driving mechanism includes a driving device and a ball screw connected to the driving device, the ball screw is threadedly connected to a fixed block, the fixed block is fixed to the slitting knife base, and the driving device is configured to drive the ball screw to rotate around its axis.

[0009] In combination with the first aspect, in one embodiment, the driving mechanism further includes a worm gear reducer, the ball screw is connected to the driving device via the worm gear reducer, and the driving device drives the ball screw to rotate via the worm gear reducer.

[0010] In combination with the first aspect, in one embodiment, the slitting centerline compensation mechanism also includes a base plate, the linear guide rail is installed on the base plate, the base plate is also fixed with a support seat, and the ball screw is rotatably installed on the support seat.

[0011] In combination with the first aspect, in one embodiment, the linear guide rail is equipped with a slider, a first support block is fixed on the slider, and the slitting knife base is installed on the slider through the first support block; the ball screw and the fixed block are located between the bottom plate and the slitting knife base.

[0012] In combination with the first aspect, in one implementation, two linear guide rails are provided on the base plate, and the ball screw and the fixed block are located between the two linear guide rails.

[0013] In combination with the first aspect, in one embodiment, a second support block is fixedly provided on the fixed block, the slitting knife base is installed on the fixed block through the second support block, and the second support block is flush with the upper surface of the first support block.

[0014] In combination with the first aspect, in one embodiment, the slitting knife base includes a main board, the main board is slidably mounted on the linear guide rail, a side panel is provided on the side edge of the main board, the side panel and the main board enclose a slitting knife installation cavity, and an installation opening is formed on one side of the slitting knife installation cavity.

[0015] In the second aspect, an embodiment of the present application provides a slitting device, which includes the above-mentioned slitting centerline compensation mechanism, and a slitting knife is installed on the slitting knife base of the slitting centerline compensation mechanism, and the slitting knife is perpendicular to the linear guide rail of the slitting centerline compensation mechanism.

[0016] In a third aspect, an embodiment of the present application provides a rolling and slitting machine, which includes the above-mentioned slitting device.

[0017] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0018] The driving mechanism can drive the slitting knife base to move along the linear guide rail. When the slitting knife is installed on the slitting knife base, the slitting centerline compensation mechanism can drive the slitting knife to move a preset offset along the linear guide rail, thereby reducing the deviation between the slitting knife and the position of the electrode to be cut, thereby reducing the adjustment amount of the electrode by the correction device before slitting, making the electrode less likely to be twisted and scrapped, thereby solving the technical problem in related technologies that easily causes the electrode to be scrapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the decomposed structure of the slitting centerline compensation mechanism provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the combined structure of the slitting centerline compensation mechanism provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of a slitting device provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of the rolling and slitting machine provided in an embodiment of the present application.

[0024] In the figure:

[0025] 1. Linear guide;

[0026] 2. Slitting knife base; 21. Main board; 22. Side panel; 23. Installation opening;

[0027] 3. Driving mechanism; 31. Ball screw; 32. Fixed block; 33. Worm gear reducer;

[0028] 4. Bottom plate; 5. Support seat; 6. Sliding block; 7. First supporting block; 8. Second supporting block;

[0029] 100, mounting seat; 200, fixing seat; 300, connecting rod; 401, upper knife shaft; 402, lower knife shaft; 403, upper cutting knife; 404, lower cutting knife;

[0030] 500, unwinding mechanism; 600, caching mechanism; 700, multi-stage stretching mechanism; 800, traction and rewinding mechanism. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] The embodiments of the present application provide a slitting centerline compensation mechanism, a slitting device and a roller-pressing slitting machine, which can solve the technical problem in the related art of achieving material line deviation of the pole piece by twisting the pole piece, which has great disadvantages and easily causes the pole piece to be scrapped.

[0033] See also Figure 1 and Figure 2 As shown, a slitting centerline compensation mechanism provided in an embodiment of the present application may include: a linear guide 1; a slitting knife base 2, the slitting knife base 2 is slidably installed on the linear guide 1; a driving mechanism 3, the driving mechanism 3 is connected to the slitting knife base 2, and the driving mechanism 3 is configured to drive the slitting knife base 2 to move a preset offset along the linear guide 1.

[0034] In this embodiment, the extension direction of the linear guide 1 is defined as the longitudinal direction. When the slitting knife is installed on the slitting knife base 2, the cutting line of the slitting knife is perpendicular to the linear guide 1. The slitting knife is installed on the linear guide 1 through the slitting knife base 2. The linear guide 1 can limit the moving direction of the slitting knife base 2 (that is, it can only move along the linear guide 1), and the linear guide 1 can carry the slitting knife base 2. In this embodiment, two parallel linear guides 1 are preferably set at intervals. Of course, this embodiment does not limit the number of linear guides 1, which can be one or more. The driving mechanism 3 in this embodiment is a power source that can drive the slitting base to move along the linear guide 1 (that is, longitudinally).

[0035] In this embodiment, the driving mechanism 3 can drive the slitting knife base 2 to move along the linear guide 1. When the slitting knife is installed on the slitting knife base 2, the cutting line of the slitting knife is perpendicular to the linear guide 1. The slitting centerline compensation mechanism can drive the slitting knife to move a preset offset along the linear guide 1, which can reduce the deviation between the slitting knife and the position of the electrode to be cut, thereby reducing the adjustment amount of the electrode by the correction device before slitting, making it difficult for the electrode to be twisted and scrapped, reducing the probability of wrinkling and breaking the electrode at this position, solving the technical problems in the related technology that easily cause the electrode to be scrapped, and effectively reducing the technical requirements for operators for switching models.

[0036] For example, when the model of the slitting knife is changed, after the slitting knife is installed in the slitting centerline compensation mechanism, the cutting line of the slitting knife may not be in a straight line with the center line of other devices in the roller-pressed slitting machine due to the change of model. At this time, during the installation of the slitting knife, the slitting centerline compensation mechanism can be used to adjust the longitudinal position of the slitting knife. For example, when the electrode piece needs to be cut from the centerline position, the cutting line of the slitting knife is basically in a straight line with the center line of other devices in the roller-pressed slitting machine. During the installation of the slitting knife, the correction device before the slitting knife does not participate in the action, and only adjusting the position of the slitting knife does not change the longitudinal offset of the electrode piece. Therefore, when adjusting the slitting knife, the electrode piece will not be longitudinally offset and twisted. At the same time, after adjusting the cutting line of the slitting knife to be in a straight line with the center line of other devices in the roller-pressed slitting machine, the deviation between the slitting knife and the electrode piece can be reduced, and the subsequent correction device adjusts the electrode piece less, which is not easy to cause the electrode piece to be twisted and scrapped.

[0037] Further, see Figure 1 As shown, in one embodiment, the driving mechanism 3 may include a driving device and a ball screw 31 connected to the driving device, the ball screw 31 is threadedly connected to a fixing block 32, the fixing block 32 is fixed to the slitting knife base 2, and the driving device is configured to drive the ball screw 31 to rotate around its axis. In this embodiment, the driving device is preferably a servo motor, which can be directly connected to the ball screw 31 or indirectly connected to the ball screw 31 through other mechanisms, so that the servo motor can drive the ball screw 31 to rotate around the axis of the ball screw 31. At the same time, the ball screw 31 is parallel to the linear guide 1, the fixing block 32 can be provided with a threaded hole, and the fixing block 32 is threadedly connected to the outside of the ball screw 31 through the threaded hole. When the ball screw 31 rotates around its axis, the ball screw 31 can drive the fixing block 32 and the slitting knife base 2 to move longitudinally through the thread. This embodiment adopts a ball screw 31 and a fixed block 32 threadedly connected to the ball screw 31, which can realize the linear motion of the slitting knife base 2 through a simple structure; and the servo motor can receive a control signal from a control device (such as a visual defect detection device). The visual defect detection device has a visual width detection function. The visual defect detection device gives a slitting deviation amount and sends a control signal to the servo motor. The servo motor is activated to directly or indirectly drive the ball screw 31 to rotate.

[0038] Based on the above technical solution, see Figure 1As shown, in some embodiments, the driving mechanism 3 may further include a worm gear reducer 33, the ball screw 31 is connected to the driving device through the worm gear reducer 33, and the driving device drives the ball screw 31 to rotate through the worm gear reducer 33. In this embodiment, the ball screw 31 is indirectly connected to the servo motor through the worm gear reducer 33, and the worm gear reducer 33 serves as a locking device. After the servo motor is activated, the worm gear reducer 33 is driven to rotate, and the worm gear reducer 33 drives the ball screw 31 to rotate. The ball screw 31 converts the rotational motion into the linear motion of the fixed block 32, and the linear motion of the fixed block 32 is used to compensate the deviation of the slitting knife to achieve the slitting size calibration.

[0039] Further, see Figure 1 As shown, in some optional embodiments, the slitting centerline compensation mechanism may further include a base plate 4, the linear guide rail 1 is mounted on the base plate 4, the base plate 4 is further fixed with a support seat 5, and the ball screw 31 is rotatably mounted on the support seat 5. In this embodiment, two support seats 5 are mounted on the base plate 4, one of which is supported on one end of the ball screw 31, and the other is supported on the other end of the ball screw 31, and the fixed block 32 is located between the two support seats 5; at the same time, the worm gear reducer 33 and the servo motor may also be mounted on the base plate 4, and the base serves as the bearing structure of the entire drive mechanism 3 and the linear guide rail 1.

[0040] Further, see Figure 1 and Figure 2 As shown, in one embodiment, the linear guide 1 is provided with a slider 6, a first support block 7 is fixed on the slider 6, and the slitting knife base 2 is installed on the slider 6 through the first support block 7; the ball screw 31 and the fixed block 32 are located between the bottom plate 4 and the slitting knife base 2. In this embodiment, a plurality of sliders 6 are installed on the linear guide 1, for example, three sliders 6 can be installed on each linear guide 1, and a slide groove is provided on the bottom surface of each slider 6, and the slide groove is inserted on the linear guide 1, so that the linear guide 1 limits the slider 6. In this embodiment, by providing the first support block 7 on the slider 6, the first support block 7 can not only fix the slitting knife base 2 to the slider 6, but also support the slitting knife base 2 to a certain height from the bottom plate 4, so that the space between the slitting knife base 2 and the bottom plate 4 can be fully utilized to place components such as the ball screw 31 and the fixed block 32.

[0041] Preferably, see Figure 1As shown, two linear guide rails 1 are arranged on the bottom plate 4, and the ball screw 31 and the fixed block 32 are located between the two linear guide rails 1. In this embodiment, the slitting knife base 2 is supported and limited by the two linear guide rails 1. At the same time, the two linear guide rails 1 are spaced a certain distance apart, and the ball screw 31 and the fixed block 32 are arranged between the two linear guide rails 1. Therefore, the space outside the two linear guide rails 1 does not need to be occupied to place the ball screw 31 and the fixed block 32, thereby further improving the space utilization.

[0042] Based on the above technical solution, see Figure 2 As shown, in one embodiment, the fixed block 32 is fixedly provided with a second support block 8, the slitting knife base 2 is mounted on the fixed block 32 through the second support block 8, and the second support block 8 is flush with the upper surface of the first support block 7. In this embodiment, not only the first support block 7 is provided at the position where the slitting knife base 2 is mounted to the linear guide rail 1, but also the second support block 8 is provided at the position where the slitting knife base 2 is mounted to the ball screw 31. The slitting knife base 2 can be supported to a certain height by the first support block 7 and the second support block 8, and at the same time, the bottom surface of the slitting knife base 2 is ensured to be in a horizontal state, so that the power can be smoothly transmitted to the slitting knife base 2 through the ball screw 31, reducing the possibility of the slitting knife base 2 being twisted during the power transmission process.

[0043] Further, see Figure 1 As shown, in some optional embodiments, the slitting knife base 2 may include a main board 21, the main board 21 is slidably mounted on the linear guide rail 1, the side edge of the main board 21 is provided with a side panel 22, the side panel 22 and the main board 21 enclose a slitting knife installation cavity, and a mounting opening 23 is formed on one side of the slitting knife installation cavity. In this embodiment, side panels 22 are provided on three sides of the main board 21, and the three side panels 22 and the main board 21 at the bottom enclose a slitting knife installation cavity with an opening on one side. When installing the slitting knife, the slitting knife mold is pushed from the mounting opening 23 into the slitting knife installation cavity and fixed, and the installation is completed. In this embodiment, there are many ways to fix the slitting knife to the slitting knife base 2, which are not limited here.

[0044] The embodiment of the present application further provides a slitting device, which may include the above-mentioned slitting centerline compensation mechanism, wherein a slitting knife is mounted on a slitting knife base 2 of the slitting centerline compensation mechanism, and the slitting knife is perpendicular to the linear guide rail 1 of the slitting centerline compensation mechanism. The slitting centerline compensation mechanism in this embodiment may adopt the slitting centerline compensation mechanism provided in any of the above-mentioned embodiments, and realize the corresponding functions, which will not be described in detail here.

[0045] See also Figure 3As shown, in the slitting device in this embodiment, the slitting knife is located on the cutting die, and the cutting die is installed on the slitting knife base 2.

[0046] Furthermore, the knife die includes a mounting seat 100 and two left and right fixed seats 200, the mounting seat 100 is mounted on the slitting knife base 2, the left and right fixed seats 200 are fixed on the left and right sides of the mounting seat 100, the left and right fixed seats 200 are connected by a connecting rod 300, and an upper knife shaft 401 and a lower knife shaft 402 are installed on the left and right fixed seats 200, wherein an upper slitting knife 403 perpendicular to the axis of the upper knife shaft 401 is installed on the upper knife shaft 401, and a lower slitting knife 404 perpendicular to the axis of the lower knife shaft 402 is installed on the lower knife shaft 402. In this embodiment, the position of the mounting seat 100 and the left and right fixed seats 200 can be adjusted as a whole through the slitting centerline compensation mechanism, and at the same time, the upper slitting knife 403 and the lower slitting knife 404 are driven to move along the axis direction of the upper knife shaft 401 and the lower knife shaft 402 to adjust the longitudinal position of the upper slitting knife 403 and the lower slitting knife 404.

[0047] See also Figure 4 As shown, the embodiment of the present application also provides a roller-pressed slitting machine, which may include the above-mentioned slitting device. Exemplarily, the roller-pressed slitting machine in this embodiment may include an unwinding mechanism 500, a buffer mechanism 600, a multi-stage stretching mechanism 700, and a traction and winding mechanism 800, etc., wherein the buffer mechanism 600 is located between the unwinding mechanism 500 and the multi-stage stretching mechanism 700, and the slitting device is included in the traction and winding mechanism 800. After the pole piece passes through the unwinding mechanism 500, the buffer mechanism 600, and the multi-stage stretching mechanism 700 in sequence, it enters the slitting device of the traction and winding mechanism 800, passes between the upper knife shaft 401 and the lower knife shaft 402, and is cut by the upper slitting knife 403 and the lower slitting knife 404, etc.

[0048] It should be noted that, except for the slitting device, the unwinding mechanism 500, the caching mechanism 600, the multi-stage stretching mechanism 700 and the traction and rewinding mechanism 800 in the embodiment of the present application can all refer to the structural form of the prior art, and the embodiment of the present application will not be repeated.

[0049] After the roller-pressed slitting machine in this embodiment adopts the slitting centerline compensation mechanism, the upper slitting knife 403 and the lower slitting knife 404 can be adjusted longitudinally by moving the slitting knife base 2, which can avoid material distortion caused by the slitting correction work and avoid or reduce fixed scrapping caused by changing the slitting knife model. At the same time, it can also reduce the difficulty of changing the slitting knife model and improve the operability of the slitting knife; and can effectively reduce the technical requirements for operators in switching models, and reduce the probability of pole piece scrapping, belt breakage and many defects and failures caused by excessive longitudinal offset of the pole piece generated by the pre-slitting correction device to realize its function.

[0050] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0051] It should be noted that, in this application, relational terms such as "first" and "second" 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0052] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A slitting centerline compensation mechanism, characterized in that: It includes: Linear guide (1); A slitting knife base (2), wherein the slitting knife base (2) is slidably mounted on the linear guide rail (1); A driving mechanism (3), wherein the driving mechanism (3) is connected to the slitting knife base (2), and the driving mechanism (3) is configured to drive the slitting knife base (2) to move a preset offset along the linear guide rail (1).

2. The slitting centerline compensation mechanism according to claim 1, characterized in that: The driving mechanism (3) comprises a driving device and a ball screw (31) connected to the driving device, the ball screw (31) being threadedly connected to a fixing block (32), the fixing block (32) being fixed to the slitting knife base (2), and the driving device being configured to drive the ball screw (31) to rotate around its axis.

3. The slitting centerline compensation mechanism according to claim 2, characterized in that: The driving mechanism (3) further comprises a worm gear reducer (33), the ball screw (31) is connected to the driving device via the worm gear reducer (33), and the driving device drives the ball screw (31) to rotate via the worm gear reducer (33).

4. The slitting centerline compensation mechanism according to claim 2, characterized in that: The slitting centerline compensation mechanism also includes a base plate (4), the linear guide rail (1) is mounted on the base plate (4), the base plate (4) is also fixed with a support seat (5), and the ball screw (31) is rotatably mounted on the support seat (5).

5. The slitting centerline compensation mechanism according to claim 4, characterized in that: The linear guide rail (1) is provided with a slider (6), a first support block (7) is fixedly provided on the slider (6), and the slitting knife base (2) is installed on the slider (6) via the first support block (7); The ball screw (31) and the fixing block (32) are located between the bottom plate (4) and the slitting knife base (2).

6. The slitting centerline compensation mechanism according to claim 5, characterized in that: Two linear guide rails (1) are arranged on the base plate (4), and the ball screw (31) and the fixing block (32) are located between the two linear guide rails (1).

7. The slitting centerline compensation mechanism according to claim 5, characterized in that: A second support block (8) is fixedly arranged on the fixed block (32); the slitting knife base (2) is mounted on the fixed block (32) via the second support block (8); and the second support block (8) is flush with the upper surface of the first support block (7).

8. The slitting centerline compensation mechanism according to claim 1, characterized in that: The slitting knife base (2) comprises a main board (21), the main board (21) is slidably mounted on the linear guide rail (1), a side plate (22) is provided at the side edge of the main board (21), the side plate (22) and the main board (21) enclose a slitting knife installation cavity, and a mounting opening (23) is formed on one side of the slitting knife installation cavity.

9. A slitting device, characterized in that: It comprises a slitting centerline compensation mechanism as described in any one of claims 1 to 8, wherein a slitting knife is mounted on a slitting knife base (2) of the slitting centerline compensation mechanism, and the slitting knife is perpendicular to a linear guide rail (1) of the slitting centerline compensation mechanism.

10. A rolling and slitting machine, characterized in that: It comprises the slitting device as claimed in claim 9.

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