Rolling device and control method thereof, pole piece conveying equipment and die-cutting machine

Abstract

The present application proposes a rolling device and its control method, an electrode conveying device and a die-cutting machine, comprising a first pressing wheel, a second pressing wheel and a drive assembly, wherein the first pressing wheel and the second pressing wheel are arranged in sequence along the conveying direction of the electrode, and the axial direction of the first pressing wheel and the second pressing wheel are consistent with the width direction of the electrode; the drive assembly comprises a first driving member and / or a second driving member, the driving end of the first driving member is connected to the first pressing wheel, and the driving end of the second driving member is connected to the second pressing wheel. Since the embodiment of the present application can drive the first pressing wheel and / or the second pressing wheel to move along the width direction of the electrode through the drive assembly to adjust the distance between the outer sides of the first pressing wheel and the second pressing wheel, the rolling width of the rolling device can be adjusted according to the width of the empty foil area of ​​the electrode. Therefore, the embodiment of the present application can adapt to empty foil areas of various widths and has high flexibility.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a rolling device and a control method thereof, a pole piece conveying device and a die-cutting machine. Background Art

[0002] During the battery manufacturing process, it is usually necessary to form a tab in the empty foil area of ​​the electrode. However, since the empty foil area of ​​the electrode is thin and has low strength, before the electrode is subjected to the tab forming process, the empty foil area can be embossed by a embossing wheel to improve the strength of the empty foil area.

[0003] Among them, the outer periphery of the corrugating wheel is provided with a number of convex grooves extending along the axial direction of the corrugating wheel. When the empty foil area of ​​the pole piece is rolled by the corrugating wheel, the empty foil area will form multiple creases arranged in sequence along the length of the pole piece, and the length direction extends along the width direction of the pole piece, so as to enhance the strength of the subsequently formed pole ear and prevent the pole ear from folding.

[0004] However, since the rolling width of the current crimping wheel is fixed, it can only roll the empty foil area with a rated width. Therefore, the current crimping wheel cannot adapt to empty foil areas of various widths and has poor flexibility. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a rolling device and a control method thereof, a pole piece conveying device and a die-cutting machine.

[0006] In a first aspect, an embodiment of the present application provides a rolling device, comprising:

[0007] The first pressing wheel and the second pressing wheel are sequentially arranged along the conveying direction of the electrode sheet, and the axial directions of the first pressing wheel and the second pressing wheel are consistent with the width direction of the electrode sheet;

[0008] A driving assembly includes a first driving member and / or a second driving member, wherein the driving end of the first driving member is connected to the first pressing wheel and is used to drive the first pressing wheel to move along the width direction of the pole piece, and the driving end of the second driving member is connected to the second pressing wheel and is used to drive the second pressing wheel to move along the width direction of the pole piece.

[0009] In some embodiments, when the driving assembly includes the first driving member and the second driving member, the first driving member and the second driving member are separated, or the fixed end of the first driving member and the fixed end of the second driving member are connected.

[0010] In some embodiments, the driving assembly further includes a rotating driving member, which is disposed between the first pressing wheel and the second pressing wheel, and the relative position between the fixed end of the rotating driving member and the first pressing wheel is fixed, and the driving end of the rotating driving member is connected to the second pressing wheel to drive the second pressing wheel to swing along a first direction, wherein the plane in which the first direction is located is perpendicular to the width direction of the pole piece.

[0011] In some embodiments, the drive assembly also includes a third drive member, which is used to drive the first pressing wheel and / or the second pressing wheel to move along the conveying direction of the pole piece to change the distance between the first pressing wheel and the second pressing wheel along the conveying direction of the pole piece.

[0012] In some embodiments, the driving assembly further includes a fourth driving member, and the fourth driving member is used to drive the first and second beading wheels to synchronously displace along the width direction of the pole piece.

[0013] In a second aspect, an embodiment of the present application provides a method for controlling the rolling device according to the first aspect, comprising:

[0014] detecting a first position of a first indentation formed by rolling the first beading wheel on the pole piece;

[0015] The position of the second crimping wheel in the conveying direction of the pole piece is adjusted according to the first position, so that a second indentation formed by rolling the second crimping wheel on the pole piece overlaps with the first indentation.

[0016] In some embodiments, adjusting the position of the second beading wheel in the conveying direction of the pole piece according to the first position includes:

[0017] determining a first distance between two adjacent first indentations according to first positions of the plurality of first indentations;

[0018] The position of the second crimping wheel in the conveying direction of the electrode sheet is adjusted according to the first spacing, so that the spacing between the second indentation and the first indentation is an integer multiple of the first spacing.

[0019] In some embodiments, detecting the first position of the first indentation formed by rolling the first beading wheel on the pole piece includes at least one of the following:

[0020] When the second beading wheel does not roll the pole piece, detecting a first detection area between the first beading wheel and the second beading wheel or a second detection area behind the second beading wheel, identifying a first indentation formed on the pole piece by the first beading wheel, and determining a first position of the first indentation;

[0021] When the second pressing wheel rolls the pole piece, the first detection area located between the first pressing wheel and the second pressing wheel is detected to identify the first indentation formed by the first pressing wheel rolling on the pole piece, and determine the first position of the first indentation.

[0022] In some embodiments, detecting a first position of a first indentation formed by rolling the first beading wheel on the pole piece includes:

[0023] When the second pressing wheel rolls the pole piece, the second detection area located behind the second pressing wheel is detected to identify multiple indentations formed by the first pressing wheel and the second pressing wheel on the pole piece, and the first indentation formed by the first pressing wheel on the pole piece is screened out from the multiple indentations, and the first position of the first indentation is determined.

[0024] In some embodiments, selecting the first indentation formed by rolling the first beading wheel on the pole piece from the plurality of indentations includes:

[0025] determining a first identification area of ​​the second detection area based on the position of the first crimping wheel, wherein the first identification area and the first crimping wheel are both located on the same side of the blank foil area of ​​the electrode piece;

[0026] The indentation in the first identification area is determined to be a first indentation formed by rolling the first crimping wheel on the pole piece.

[0027] In some embodiments, adjusting the position of the second beading wheel in the conveying direction of the pole piece according to the first position includes:

[0028] When the second beading wheel rolls the pole piece, detecting a second detection area behind the second beading wheel to identify a first indentation formed on the pole piece by the first beading wheel and a second indentation formed on the pole piece by the second beading wheel;

[0029] Determining a first position of the first indentation in the direction of pole piece conveyance and a second position of the adjacent second indentation in the direction of pole piece conveyance;

[0030] When the first position and the second position do not overlap, determining a second distance between the first indentation and an adjacent second indentation;

[0031] The second pressing wheel is controlled to move the second distance in the conveying direction of the pole piece.

[0032] In some embodiments, identifying a first indentation formed by rolling the first beading wheel on the pole piece and a second indentation formed by rolling the second beading wheel on the pole piece includes:

[0033] determining a first identification area of ​​the second detection area based on the position of the first crimping wheel, wherein the first identification area and the first crimping wheel are both located on the same side of the blank foil area of ​​the electrode piece;

[0034] determining a second identification area of ​​the second detection area based on the position of the second beading wheel, wherein the second identification area and the second beading wheel are both located on the same side of the empty foil area of ​​the pole piece;

[0035] The indentation in the first identification area is determined as the first indentation formed by rolling the first beading wheel on the pole piece, and the indentation in the second identification area is determined as the second indentation formed by rolling the second beading wheel on the pole piece.

[0036] In a third aspect, an embodiment of the present application provides a pole piece conveying device, comprising two rolling devices according to the first aspect, wherein the two rolling devices are respectively used to roll two opposite surfaces of the pole piece.

[0037] In a fourth aspect, an embodiment of the present application provides a die-cutting machine, comprising the electrode conveying device of the third aspect mentioned above.

[0038] According to the technical solution of the embodiment of the present application, there are at least the following beneficial effects: the embodiment of the present application includes a first pressing wheel, a second pressing wheel and a drive assembly, wherein the first pressing wheel and the second pressing wheel are arranged in sequence along the conveying direction of the electrode sheet, and the axial direction of the first pressing wheel and the second pressing wheel are consistent with the width direction of the electrode sheet; the drive assembly includes a first drive member and / or a second drive member, the drive end of the first drive member is connected to the first pressing wheel, and the drive end of the second drive member is connected to the second pressing wheel. Since the embodiment of the present application can drive the first pressing wheel and / or the second pressing wheel to move along the width direction of the electrode sheet through the drive assembly to adjust the distance between the outer sides of the first pressing wheel and the second pressing wheel, the rolling width of the rolling device can be adjusted according to the width of the empty foil area of ​​the electrode sheet. Therefore, the embodiment of the present application can adapt to empty foil areas of various widths and has strong flexibility.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0041] Figure 1 This is a schematic structural diagram of a rolling device provided by one embodiment of the present application;

[0042] Figure 2 is a structural schematic diagram of a rolling device provided by another embodiment of the present application;

[0043] Figure 3 This is a schematic diagram of the indentation made by the rolling device provided in one embodiment of the present application on the empty foil area of ​​the electrode;

[0044] Figure 4 This is a schematic diagram of the surface texture of the beading wheel in the rolling device provided in one embodiment of the present application;

[0045] Figure 5 This is a schematic diagram of the surface texture of a beading wheel in a rolling device provided in another embodiment of the present application;

[0046] Figure 6 This is a flowchart of the steps of a control method of a rolling device provided by an embodiment of the present application;

[0047] Figure 7 is a flowchart of the steps of a control method of a rolling device provided by another embodiment of the present application;

[0048] Figure 8 is a flowchart of the steps of a control method of a rolling device provided by another embodiment of the present application;

[0049] Figure 9 is a flowchart of the steps of a control method of a rolling device provided by another embodiment of the present application;

[0050] Figure 10 is a flowchart of the steps of a control method of a rolling device provided by another embodiment of the present application;

[0051] Figure 11 is a flowchart of the steps of a control method of a rolling device provided by another embodiment of the present application;

[0052] Figure 12 1 is a schematic structural diagram of a controller for executing a control method for a rolling device provided by one embodiment of the present application;

[0053] Figure 13 It is a structural schematic diagram of the electrode conveying equipment provided in one embodiment of the present application. DETAILED DESCRIPTION

[0054] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0055] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do 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, they cannot be understood as limitations on this application.

[0056] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0057] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0058] In some cases, during the battery manufacturing process, it is usually necessary to form a tab in the empty foil area of ​​the electrode. However, since the thickness of the empty foil area of ​​the electrode is relatively thin and the strength is relatively low, before the electrode is subjected to the tab forming process, the empty foil area can be subjected to a corrugation treatment using a corrugation wheel to improve the strength of the empty foil area. The outer periphery of the corrugation wheel is provided with a plurality of convex grooves extending along the axial direction of the corrugation wheel. When the empty foil area of ​​the electrode is rolled by the corrugation wheel, the empty foil area will form a plurality of folds arranged in sequence along the length of the electrode and extending along the width direction of the electrode in the length direction, so as to strengthen the strength of the subsequently formed tab and prevent the tab from folding. However, since the rolling width of the current corrugation wheel is fixed, it can only roll the empty foil area with a rated width. Therefore, the current corrugation wheel cannot adapt to empty foil areas of various widths and has poor flexibility.

[0059] Based on the above situation, the embodiment of the present application proposes a rolling device and its control method, an electrode conveying device and a die-cutting machine, which can adjust the rolling width of the rolling device according to the width of the electrode empty foil area, so that it can adapt to a variety of empty foil areas of different widths and improve the flexibility of the rolling device.

[0060] The rolling device of the embodiment of the present application is further described below with reference to the accompanying drawings.

[0061] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic structural diagram of a rolling device provided by one embodiment of the present application; Figure 2 It is a structural schematic diagram of a rolling device provided in another embodiment of the present application.

[0062] In one embodiment, the rolling device of the embodiment of the present application includes but is not limited to a first pressing wheel 110, a second pressing wheel 120 and a drive assembly, wherein the first pressing wheel 110 and the second pressing wheel 120 are arranged in sequence along the conveying direction of the pole piece 300, and the axial direction of the first pressing wheel 110 and the second pressing wheel 120 are consistent with the width direction of the pole piece 300; the drive assembly includes a first driving member 210 connected to the first pressing wheel 110 at the driving end and / or a second driving member connected to the second pressing wheel 120 at the driving end (not shown in the figure).

[0063] Specifically, during the transportation, the electrode 300 is rolled by the first and second pressing wheels 110 and 120 in sequence. Since the outer circumferences of the first and second pressing wheels 110 and 120 are provided with a plurality of convex grooves, the electrode 300 will be formed with the following hollow foil area 310: Figure 3 As shown in FIG, a plurality of first indentations 311 and second indentations 312 are arranged in sequence along the length of the electrode 300 and the length direction extends along the width direction of the electrode 300, wherein the distance between the outer sides of the first indentation 311 and the second indentation 312 is the rolling width of the rolling device, for example Figure 3 The distance between the left end of the first indentation 311 and the right end of the second indentation 312 shown in FIG is the rolling width of the rolling device.

[0064] Therefore, the embodiment of the present application can drive the first pressing wheel 110 and / or the second pressing wheel 120 to move along the width direction of the pole piece 300 through the driving component to adjust the distance between the outer sides of the first pressing wheel 110 and the second pressing wheel 120, so as to adjust the rolling width of the rolling device according to the width of the empty foil area 310 of the pole piece 300. Therefore, the embodiment of the present application can adapt to a variety of empty foil areas 310 of different widths and has strong flexibility.

[0065] It should be noted that the adjustment methods for the rolling width of the rolling device may include but are not limited to the following three methods:

[0066] The first adjustment method: the drive assembly only includes the first drive member 210, wherein the drive end of the first drive member 210 is connected to the first pressing wheel 110. In this regard, the embodiment of the present application can drive the first pressing wheel 110 to move along the width direction of the pole piece 300 through the first drive member 210 while keeping the position of the second pressing wheel 120 unchanged, and change the rolling width of the rolling device by changing the position of the outer end of the first pressing wheel 110.

[0067] The second adjustment method: the drive assembly only includes a second drive member, wherein the drive end of the second drive member is connected to the second pressing wheel 120. In this regard, the embodiment of the present application can drive the second pressing wheel 120 to move along the width direction of the pole piece 300 through the second drive member while keeping the position of the first pressing wheel 110 unchanged, and change the rolling width of the rolling device by changing the position of the outer end of the second pressing wheel 120.

[0068] The third adjustment method: the driving assembly includes a first driving member 210 and a second driving member, wherein the driving end of the first driving member 210 is connected to the first pressing wheel 110, and the driving end of the second driving member is connected to the second pressing wheel 120. In this regard, the embodiment of the present application can drive the first pressing wheel 110 to move along the width direction of the pole piece 300 through the first driving member 210, and / or drive the second pressing wheel 120 to move along the width direction of the pole piece 300 through the second driving member, thereby changing the rolling width of the rolling device.

[0069] It can be understood that the structural mode of the above-mentioned first driving member 210 and the second driving member can be a motor driving structure, a cylinder or hydraulic cylinder driving structure, or other structural modes. The embodiment of the present application does not specifically limit the structural mode of the first driving member 210 and the second driving member.

[0070] In one embodiment, when the driving assembly includes a first driving member 210 and a second driving member, the positional arrangement of the first driving member 210 and the second driving member may include but is not limited to the following two methods:

[0071] The first position setting method: Figure 1 As shown, the first driving member 210 and the second driving member may be separately provided, that is, there may be no connection relationship between the first driving member 210 and the second driving member.

[0072] The second position setting manner: the fixed end of the first driving member 210 is connected to the fixed end of the second driving member, that is, the first driving member 210 and the second driving member can be directly connected or indirectly connected.

[0073] In one embodiment, if Figure 2As shown, the driving component also includes but is not limited to a rotating driving member 220, which is arranged between the first pressing wheel 110 and the second pressing wheel 120, and the relative position between the fixed end of the rotating driving member 220 and the first pressing wheel 110 is fixed, and the driving end of the rotating driving member 220 is connected to the second pressing wheel 120 to drive the second pressing wheel 120 to swing along the first direction, wherein the plane where the first direction is located is perpendicular to the width direction of the pole piece 300.

[0074] For example, Figure 2 As shown, for the case where the driving assembly only includes the first driving member 210 but not the second driving member, the fixed end of the rotating driving member 220 can be connected to the fixed end of the first driving member 210, and the driving end of the rotating driving member 220 can be connected to the second pressing wheel 120 to drive the second pressing wheel 120 to swing along the first direction.

[0075] Alternatively, for example, for the second position setting method mentioned above, the fixed end of the rotating drive member 220 is connected to the fixed end of the first drive member 210, and the driving end of the rotating drive member 220 is connected to the fixed end of the second drive member to drive the second drive member and the second pressure wheel 120 to swing along the first direction.

[0076] Specifically, during rolling, when there is a gap between the second pressing wheel 120 and the empty foil area 310 of the pole piece 300, which makes it impossible for the second pressing wheel 120 to roll the pole piece 300, the embodiment of the present application can drive the second pressing wheel 120 to swing along the first direction by the driving end of the rotating driving member 220, thereby shortening the distance between the outer peripheral surface of the second pressing wheel 120 and the empty foil area 310 of the pole piece 300, and thus the second pressing wheel 120 can be tightly pressed against the empty foil area 310 of the pole piece 300.

[0077] It is understandable that the structure of the above-mentioned rotating drive member 220 can be a motor drive structure or other structures. The embodiment of the present application does not specifically limit the structure of the rotating drive member 220.

[0078] In one embodiment, the drive assembly also includes a third drive member 230, which is used to drive the first pressing wheel 110 and / or the second pressing wheel 120 to move along the second direction, so that the first pressing wheel 110 and / or the second pressing wheel 120 move along the conveying direction of the pole piece 300 to change the distance between the first pressing wheel 110 and the second pressing wheel 120 along the conveying direction of the pole piece 300.

[0079] For example, Figure 2As shown, the fixed end of the third driving member 230 is connected to the driving end of the rotating driving member 220, and the driving end of the third driving member 230 is connected to the second pressing wheel 120, wherein the rotating driving member 220 can drive the third driving member 230 and the second pressing wheel 120 to swing together in the first direction, and the third driving member 230 can drive the second pressing wheel 120 to extend and retract in the second direction.

[0080] It can be understood that the structure of the above-mentioned third driving member 230 can be a motor driving structure, a cylinder or hydraulic cylinder driving structure, or other structures. The embodiment of the present application does not specifically limit the structure of the third driving member 230.

[0081] In one embodiment, the driving assembly further includes but is not limited to a fourth driving member 240 , which is used to drive the first and second beading wheels 110 and 120 to synchronously displace along the width direction of the pole piece 300 .

[0082] For example, Figure 2 As shown, the driving end of the fourth driving member 240 is connected to the fixed end of the first driving member 210 to drive the first driving member 210, the first crimping wheel 110, the rotating driving member 220, the third driving member 230 and the second crimping wheel 120 to move along the width direction of the pole piece 300.

[0083] Specifically, in the embodiment of the present application, the fourth driving member 240 can drive the first and second pressing wheels 110 and 120 to move as a whole along the width direction of the pole piece 300 , thereby adjusting the rolling positions of the first and second pressing wheels 110 and 120 .

[0084] It can be understood that the structure of the above-mentioned fourth driving member 240 can be a motor-driven structure, a cylinder or hydraulic cylinder-driven structure, or other structures. The embodiment of the present application does not specifically limit the structure of the fourth driving member 240.

[0085] In one embodiment, the texture forms of the circumferential surfaces of the first and second beading wheels 110 and 120 may include but are not limited to the following two situations:

[0086] The first type of texture: Figure 4 As shown, a plurality of first strip folds 410 are provided on the circumferential surfaces of the first and second beading wheels 110 and 120 , wherein each first strip fold 410 extends along the width direction of the pole piece 300 .

[0087] The second type of texture: Figure 5As shown, the circumferential surfaces of the first and second beading wheels 110 and 120 are provided with a plurality of combined folds, each of which includes a plurality of second strip folds 420 , wherein the plurality of second strip folds 420 are distributed at angles.

[0088] Specifically, if Figure 4 As shown, the texture of the circumferential surface of the first and second pressing wheels 110 and 120 can be a first strip fold 410 extending along the axial direction of the pressing wheel, wherein the first strip fold 410 extending along the width direction of the pole piece 300 can significantly increase the strength of the empty foil area 310 along the width direction of the pole piece 300, but along the length direction of the pole piece 300, the first strip fold 410 formed does not significantly enhance the strength of the empty foil area 310. Therefore, the empty foil area 310 is still prone to expansion and contraction along the length direction of the pole piece 300. In this regard, the texture of the circumferential surface of the first and second pressing wheels 110 and 120 can be selected as follows: Figure 5 The V-shaped combined folds shown can form at least two line segments distributed at an angle, thereby improving the strength of at least two angled directions in the tab hollow foil area 310.

[0089] Those skilled in the art will appreciate that the structure described above does not limit the rolling device, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0090] Based on the hardware structure of the above-mentioned rolling device, various embodiments of the control method of the rolling device of the present application are proposed.

[0091] It should be noted that if Figure 3 As shown, the two sides of the empty foil area 310 are the coating areas 320, and the empty foil area 310 is rolled with a first indentation 311 and a second indentation 312. Along the length direction of the electrode, the first indentation 311 rolled by the first pressing wheel 110 in the empty foil area 310 of the electrode 300 and the second indentation 312 rolled by the second pressing wheel 120 in the empty foil area 310 of the electrode 300 may be in different positions, that is, the first indentation 311 and the second indentation 312 may not be on the same straight line. Therefore, in the empty foil area 310, the number of indentations in the overlapping area 313 rolled by the first pressing wheel 110 and the second pressing wheel 120 will be more than the number of indentations in the non-overlapping area, which will result in inconsistent strength in the width direction of the empty foil area 310, and therefore there will still be a risk of folding.

[0092] In this regard, the roller pressing device of the embodiment of the present application proposes a control method that can solve the above-mentioned folding problem, and its implementation method can refer to the following Figures 6 to 11 The details are as follows:

[0093] like Figure 6 As shown, Figure 6 This is a flowchart of a control method for a roller pressing device according to an embodiment of the present application. This control method can be applied to the roller pressing device of any of the above embodiments, and may include but is not limited to step S110 and step S120.

[0094] Step S110, detecting a first position of a first indentation formed by rolling the first beading wheel on the electrode piece;

[0095] Step S120 : adjusting the position of the second crimping wheel in the conveying direction of the electrode sheet according to the first position so that the second indentation formed by rolling the second crimping wheel on the electrode sheet overlaps with the first indentation.

[0096] In one embodiment, the embodiment of the present application can detect the first position of the first indentation rolled by the first pressing wheel on the pole piece through a detection unit, and then drive the second pressing wheel to move along the pole piece transmission direction through a third driving member, so that the second indentation rolled by the second pressing wheel on the pole piece can overlap with the first indentation rolled by the first pressing wheel.

[0097] Since the embodiment of the present application can adjust the second indentation to be on the same straight line as the first indentation, the number of indentations in the overlapping area of ​​the rolling of the first and second beading wheels can be equal to the number of indentations in the non-overlapping area, thereby keeping the strength of the empty foil area in the width direction consistent and reducing the risk of folding.

[0098] It should be noted that if the target moving position of the second pressing wheel is inferred based on the first position including the current position of the second pressing wheel, then there is no need to adjust the position of the second pressing wheel at this time; if the target moving position of the second pressing wheel is inferred based on the first position does not include the current position of the second pressing wheel, then it is necessary to adjust the position of the second pressing wheel in the direction of pole piece conveying.

[0099] In addition, it should be noted that the above-mentioned detection unit may be an image detection unit, which can photograph the surface of the electrode and then perform image recognition based on the photographed image to identify the indentation at the empty foil area of ​​the electrode.

[0100] In addition, if Figure 7 As shown, Figure 7 This is a flowchart of a control method for a rolling device according to another embodiment of the present application. Regarding the above step S120 of adjusting the position of the second pressing wheel in the conveying direction of the electrode according to the first position, it may include but is not limited to step S210 and step S220.

[0101] Step S210: determining a first distance between two adjacent first indentations according to first positions of the plurality of first indentations;

[0102] Step S220: adjusting the position of the second crimping wheel in the conveying direction of the electrode according to the first spacing, so that the spacing between the second indentation and the first indentation is an integer multiple of the first spacing.

[0103] In one embodiment, first, the embodiment of the present application can detect the first spacing between two adjacent first indentations through a detection unit, and then drive the second pressing wheel to move along the pole piece transmission direction through a third driving member, so that the spacing between the second indentation and the first indentation is an integer multiple of the first spacing. Since the first spacing between the two adjacent first indentations is fixed, setting the spacing between the second indentation and the first indentation to an integer multiple of the first spacing can make the second indentation and the first indentation overlap.

[0104] It should be noted that the first position of the first indentation formed by the first crimping wheel on the electrode sheet in step S110 may include but is not limited to: Figures 8 to 10 The three implementation methods shown in are as follows:

[0105] like Figure 8 As shown, Figure 8 This is a flowchart of the steps of a control method for a rolling device according to another embodiment of the present application. Regarding step S110 of detecting the first position of the first indentation formed by the first crimping wheel on the pole piece, the steps may include but are not limited to step S310, step S320, and step S330.

[0106] Step S310: When the second beading wheel is not rolling the electrode sheet, inspect the first inspection area between the first beading wheel and the second beading wheel or the second inspection area behind the second beading wheel;

[0107] Step S320, identifying a first indentation formed by the first crimping wheel rolling on the electrode;

[0108] Step S330: Determine a first position of a first indentation.

[0109] In one embodiment, if the second pressing wheel does not roll the pole piece before adjustment, then the indentations in the first detection area between the first pressing wheel and the second pressing wheel are all first indentations formed by the first pressing wheel rolling on the pole piece, and the indentations in the second detection area behind the second pressing wheel are all first indentations formed by the first pressing wheel rolling on the pole piece.

[0110] like Figure 9 As shown, Figure 9This is a flowchart of the steps of a control method for a rolling device according to another embodiment of the present application. Regarding the detection of the first position of the first indentation formed by the first crimping wheel on the pole piece in step S110, the steps may include but are not limited to steps S410, S420, and S430.

[0111] Step S410: When the second beading wheel is rolling the electrode sheet, a first detection area between the first beading wheel and the second beading wheel is detected;

[0112] Step S420: identifying a first indentation formed by the first crimping wheel rolling on the electrode;

[0113] Step S430: Determine a first position of a first indentation.

[0114] like Figure 10 As shown, Figure 10 This is a flowchart of the steps of a control method for a rolling device according to another embodiment of the present application. Regarding step S110 of detecting the first position of the first indentation formed by the first crimping wheel on the pole piece, the method may include but is not limited to steps S510, S520, S530, and S540.

[0115] Step S510: When the second beading wheel is rolling the electrode sheet, a second detection area located behind the second beading wheel is detected;

[0116] Step S520, identifying a plurality of indentations formed by the first and second beading wheels rolling on the electrode sheet;

[0117] Step S530, selecting a first indentation formed by rolling the first beading wheel on the electrode from the plurality of indentations;

[0118] Step S540: Determine a first position of a first indentation.

[0119] In addition, if Figure 9 and Figure 10 As shown, if the second pressing wheel has rolled the pole piece before adjustment, then the indentations in the first detection area between the first pressing wheel and the second pressing wheel are all first indentations formed by the first pressing wheel rolling on the pole piece. However, the indentations in the second detection area behind the second pressing wheel include the first indentation formed by the first pressing wheel rolling on the pole piece and the second indentation formed by the second pressing wheel rolling on the pole piece.

[0120] For the case where the second crimping wheel has already rolled the electrode before adjustment and the detection is performed in the second detection area located behind the second crimping wheel, in order to screen out the first indentation, it may include but is not limited to the following screening methods: determining the first identification area of ​​the second detection area based on the position of the first crimping wheel, wherein the first identification area and the first crimping wheel are both located on the same side of the empty foil area of ​​the electrode; and then determining the indentation in the first identification area as the first indentation formed by rolling the first crimping wheel on the electrode.

[0121] In one embodiment, the first identification area is determined according to the position of the first beading wheel. The first identification area is located in the second detection area, and the first identification area can be limited to an area containing only the first indentation. For example, the first identification area is set at Figure 3 The left area of ​​the empty foil area.

[0122] In addition, if Figure 11 As shown, Figure 11 This is a flowchart of the steps of a control method for a rolling device provided by another embodiment of the present application. Regarding the above-mentioned step S120 of adjusting the position of the second pressing wheel in the conveying direction of the electrode according to the first position, it may include but is not limited to steps S610, S620, S630 and S640.

[0123] Step S610: When the second beading wheel is rolling the electrode sheet, a second detection area located behind the second beading wheel is detected to identify a first indentation formed by the first beading wheel on the electrode sheet and a second indentation formed by the second beading wheel on the electrode sheet;

[0124] Step S620, determining a first position of the first indentation in the electrode sheet conveying direction and a second position of the adjacent second indentation in the electrode sheet conveying direction;

[0125] Step S630: When the first position and the second position do not overlap, determining a second distance between the first indentation and an adjacent second indentation;

[0126] Step S640: Control the second crimping wheel to move a second distance in the conveying direction of the electrode piece.

[0127] In one embodiment, when the electrode has been rolled before the second pressing wheel is adjusted, the embodiment of the present application can detect the second detection area located behind the second pressing wheel, identify the first indentation and its first position in the electrode conveying direction, and identify the second indentation and its second position in the electrode conveying direction, and then compare the first position and the second position. If the comparison result indicates that the first indentation and the second indentation do not overlap, the embodiment of the present application can obtain the second spacing between the first indentation and the second adjacent indentation, and then drive the second pressing wheel to move the above-mentioned second spacing.

[0128] It should be noted that whether the first indentation and the second indentation mentioned above overlap refers to whether the first position of the first indentation in the electrode sheet conveying direction and the second position of the second indentation in the electrode sheet conveying direction overlap and overlap.

[0129] In addition, it should be noted that, for the case where the second crimping wheel has already rolled the electrode before adjustment and is being inspected in the second detection area behind the second crimping wheel, in order to screen and distinguish the first indentation from the second indentation, the screening method may include but is not limited to the following: determining the first identification area of ​​the second detection area based on the position of the first crimping wheel and determining the second identification area of ​​the second detection area based on the position of the second crimping wheel, wherein the first identification area and the first crimping wheel are both located on the same side of the empty foil area of ​​the electrode, and the second identification area and the second crimping wheel are both located on the same side of the empty foil area of ​​the electrode; then, determining the indentation in the first identification area as the first indentation formed by rolling the first crimping wheel on the electrode, and determining the indentation in the second identification area as the second indentation formed by rolling the second crimping wheel on the electrode.

[0130] Specifically, in one embodiment, the present application embodiment can limit the first identification area to an area containing only the first indentation, for example, the first identification area is set at Figure 3 At the same time, the second identification area can be limited to the area containing only the second indentation, for example, the second identification area is set to Figure 3 The area to the right of the empty foil area.

[0131] Based on the rolling device and control method thereof of each of the above-mentioned embodiments, various embodiments of the controller, electrode conveying equipment, die-cutting machine and computer-readable storage medium of the present application are respectively proposed below.

[0132] like Figure 12 As shown, Figure 12 : is a schematic diagram of the structure of a controller 500 for executing a control method for a rolling device provided by an embodiment of the present application. The controller 500 implemented in the present application includes: a processor 510, a memory 520, and a computer program stored in the memory 520 and executable on the processor 510, wherein: Figure 12 In the figure, a processor 510 and a memory 520 are taken as an example.

[0133] The processor 510 and the memory 520 may be connected via a bus or other means. Figure 12 The bus connection is taken as an example.

[0134] The memory 520 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 520 may include a high-speed random access memory and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 520 may optionally include a memory 520 remotely located relative to the processor 510, and these remote memories 520 may be connected to the controller 500 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0135] Those skilled in the art will understand that Figure 12 The device structure shown in the figure does not constitute a limitation on the controller 500, and the controller 500 may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0136] exist Figure 12 In the illustrated controller 500, the processor 510 can be used to call the control program for the rolling device stored in the memory 520, thereby implementing the above-described method for controlling the rolling device. Specifically, the non-transitory software program and instructions required to implement the above-described method for controlling the rolling device are stored in the memory 520. When executed by the processor 510, the method for controlling the rolling device of the above-described embodiment is performed.

[0137] It is worth noting that since the controller 500 of the embodiment of the present application can execute the control method of the rolling device of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the controller 500 of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method of the rolling device of any of the above-mentioned embodiments.

[0138] In addition, if Figure 13 As shown, Figure 13 The diagram is a schematic diagram of the structure of a pole piece conveying device provided in one embodiment of the present application. The pole piece conveying device of the present application comprises two rolling devices of any of the above embodiments, wherein the two rolling devices are respectively used to roll two opposite surfaces of the pole piece.

[0139] In one embodiment, the patterns of the embossing wheels in the two roller pressing devices in the electrode conveying equipment may include, but are not limited to, the following combinations of patterns:

[0140] The first pattern combination method: the patterns of the first pressing wheel and the second pressing wheel in the two roller pressing devices are both multiple first strip folds.

[0141] The second pattern combination method: the patterns of the first and second beading wheels in one rolling device are multiple first strip folds, and the patterns of the first and second beading wheels in the other rolling device are multiple combined folds.

[0142] The third pattern combination method: the patterns of the first and second pressing wheels in the two roller pressing devices are multiple combined creases.

[0143] In addition, it should be noted that in order to improve the strength of at least three angled directions in the tab empty foil area, the above-mentioned second pattern combination method can be adopted, for example: the patterns of the first and second pressing wheels in one rolling device are strip-shaped indentations, and the patterns of the first and second pressing wheels in the other rolling device are V-shaped indentations; or, on the basis of the above-mentioned third pattern combination method, it is required that the angle directions or sizes of the combined folds in the two rolling devices are different, for example, the patterns of the first and second pressing wheels in the two rolling devices are both V-shaped indentations, but the V-shaped opening directions are opposite or the V-shaped angles are different.

[0144] It is worth noting that since the electrode conveying equipment of the embodiment of the present application includes the rolling device of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the electrode conveying equipment of the embodiment of the present application can refer to the specific implementation methods and technical effects of the rolling device and its control method of any of the above-mentioned embodiments.

[0145] In addition, an embodiment of the present application further provides a die-cutting machine, which includes but is not limited to the electrode conveying equipment of the above embodiment.

[0146] It is worth noting that since the die-cutting machine of the embodiment of the present application includes the electrode conveying equipment of any of the above-mentioned embodiments, and the electrode conveying equipment of any of the above-mentioned embodiments includes the rolling device of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the die-cutting machine of the embodiment of the present application can refer to the specific implementation manner and technical effects of the rolling device and its control method of any of the above-mentioned embodiments.

[0147] In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the control method of the above-described rolling device. Figures 6 to 11 The method steps in .

[0148] It is worth noting that since the computer-readable storage medium of the embodiment of the present application can execute the control method of the rolling device of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the computer-readable storage medium of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method of the rolling device of any of the above-mentioned embodiments.

[0149] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include computer storage media (or non-transitory media) and communication media (or temporary media). As known to those skilled in the art, the term computer storage media is included in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data) and is volatile and non-volatile, removable, and non-removable. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disks (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage, or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0150] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the art can also make various equivalent modifications or substitutions under the shared conditions that do not violate the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A rolling device, characterized in that: include: The first pressing wheel and the second pressing wheel are sequentially arranged along the conveying direction of the electrode sheet, and the axial directions of the first pressing wheel and the second pressing wheel are consistent with the width direction of the electrode sheet; a driving assembly comprising a first driving member and / or a second driving member, wherein a driving end of the first driving member is connected to the first beading wheel and is used to drive the first beading wheel to move along the width direction of the pole piece, and a driving end of the second driving member is connected to the second beading wheel and is used to drive the second beading wheel to move along the width direction of the pole piece; The drive assembly also includes a third drive member, which is used to drive the first pressing wheel and / or the second pressing wheel to move along the conveying direction of the pole piece to change the distance between the first pressing wheel and the second pressing wheel along the conveying direction of the pole piece.

2. The roller pressing device according to claim 1, characterized in that In the case where the driving assembly includes the first driving member and the second driving member, the first driving member and the second driving member are separated from each other, or the fixed end of the first driving member and the fixed end of the second driving member are connected.

3. The roller pressing device according to claim 1 or 2, characterized in that: The driving assembly also includes a rotating driving member, which is arranged between the first pressing wheel and the second pressing wheel. The relative position between the fixed end of the rotating driving member and the first pressing wheel is fixed, and the driving end of the rotating driving member is connected to the second pressing wheel to drive the second pressing wheel to swing along the first direction, wherein the plane where the first direction is located is perpendicular to the width direction of the pole piece.

4. The roller pressing device according to claim 1 or 2, characterized in that: The driving assembly further includes a fourth driving member, and the fourth driving member is used to drive the first and second beading wheels to synchronously displace along the width direction of the pole piece.

5. A method for controlling a rolling device according to any one of claims 1 to 4, characterized in that: include: detecting a first position of a first indentation formed by rolling the first beading wheel on the pole piece; The position of the second crimping wheel in the conveying direction of the pole piece is adjusted according to the first position, so that a second indentation formed by rolling the second crimping wheel on the pole piece overlaps with the first indentation.

6. The control method according to claim 5, characterized in that: The adjusting the position of the second beading wheel in the conveying direction of the pole piece according to the first position includes: determining a first distance between two adjacent first indentations according to first positions of the plurality of first indentations; The position of the second crimping wheel in the conveying direction of the electrode sheet is adjusted according to the first spacing, so that the spacing between the second indentation and the first indentation is an integer multiple of the first spacing.

7. The control method according to claim 5 or 6, characterized in that: The detecting of the first position of the first indentation formed by rolling the first beading wheel on the pole piece includes at least one of the following: When the second beading wheel does not roll the pole piece, detecting a first detection area between the first beading wheel and the second beading wheel or a second detection area behind the second beading wheel, identifying a first indentation formed on the pole piece by the first beading wheel, and determining a first position of the first indentation; When the second pressing wheel rolls the pole piece, the first detection area located between the first pressing wheel and the second pressing wheel is detected to identify the first indentation formed by the first pressing wheel rolling on the pole piece, and determine the first position of the first indentation.

8. The control method according to claim 5 or 6, characterized in that: The detecting a first position of a first indentation formed by rolling the first beading wheel on the pole piece includes: When the second pressing wheel rolls the pole piece, the second detection area located behind the second pressing wheel is detected to identify multiple indentations formed by the first pressing wheel and the second pressing wheel on the pole piece, and the first indentation formed by the first pressing wheel on the pole piece is screened out from the multiple indentations, and the first position of the first indentation is determined.

9. The control method according to claim 8, characterized in that: The step of selecting the first indentation formed by rolling the first beading wheel on the pole piece from the plurality of indentations comprises: determining a first identification area of ​​the second detection area based on the position of the first crimping wheel, wherein the first identification area and the first crimping wheel are both located on the same side of the blank foil area of ​​the pole piece; The indentation in the first identification area is determined to be a first indentation formed by rolling the first crimping wheel on the pole piece.

10. The control method according to claim 5, characterized in that: The adjusting the position of the second beading wheel in the conveying direction of the pole piece according to the first position includes: When the second beading wheel rolls the pole piece, detecting a second detection area behind the second beading wheel to identify a first indentation formed on the pole piece by the first beading wheel and a second indentation formed on the pole piece by the second beading wheel; Determining a first position of the first indentation in the direction of pole piece conveyance and a second position of the adjacent second indentation in the direction of pole piece conveyance; When the first position and the second position do not overlap, determining a second distance between the first indentation and an adjacent second indentation; The second pressing wheel is controlled to move the second distance in the conveying direction of the pole piece.

11. The control method according to claim 10, characterized in that: The identifying of a first indentation formed by rolling the first beading wheel on the pole piece and a second indentation formed by rolling the second beading wheel on the pole piece includes: determining a first identification area of ​​the second detection area based on the position of the first crimping wheel, wherein the first identification area and the first crimping wheel are both located on the same side of the blank foil area of ​​the pole piece; determining a second identification area of ​​the second detection area based on the position of the second beading wheel, wherein the second identification area and the second beading wheel are both located on the same side of the empty foil area of ​​the pole piece; The indentation in the first identification area is determined as the first indentation formed by rolling the first beading wheel on the pole piece, and the indentation in the second identification area is determined as the second indentation formed by rolling the second beading wheel on the pole piece.

12. A pole piece conveying device, characterized in that: It comprises two rolling devices according to any one of claims 1 to 4, and the two rolling devices are respectively used to roll two opposite surfaces of the pole piece.

13. A die-cutting machine, characterized in that: Including the electrode conveying equipment as described in claim 12.

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