Gluing device, winding equipment and battery cell

Abstract

The utility model relates to a rubberizing device, winding equipment and a battery cell. The rubberizing device comprises a bending mechanism used for bending a bending area, adjacent to a tab area, on a pole piece material belt so as to form a wrinkle part on one side of the pole piece material belt; the first adhesive tape sticking mechanism is arranged at the bending mechanism and is used for sticking a first adhesive tape to one side, deviating from the wrinkle part, of the pole piece material belt so as to cover the tab area and the bending area; and the second adhesive tape sticking mechanism is arranged at the downstream of the bending mechanism and is used for sticking a second adhesive tape to one side, deviating from the first adhesive tape, of the pole piece material belt so as to cover the tab area and the bending area. Therefore, on one hand, the first adhesive tape and the second adhesive tape are used for protecting the tabs in the tab area, and on the other hand, the wrinkle part is formed between the second adhesive tape and the pole piece material belt, so that the wrinkle part can be adaptively opened to play a buffering role when the pole piece material belt is pulled, namely, a certain stretching amount is reserved; and the risk that the pole piece material belt is torn is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing equipment, in particular to a glue sticking device, a winding device and a battery core. Background Art

[0002] During the battery manufacturing process, the tabs need to be welded to the pole sheet strip. The location on the pole sheet strip where the tabs need to be welded is called the welding area. Each welding area is arranged at intervals along the length of the pole sheet strip. After the tabs are welded to the welding area on the pole sheet strip, the winding mechanism winds the pole sheet strip to form a battery cell.

[0003] However, the pole piece material strip will be subjected to a certain tension during the conveying process, which will cause a certain degree of pulling on the welding area of ​​the pole piece material strip, making the welding area of ​​the pole piece material strip easy to tear. Utility Model Content

[0004] Based on this, it is necessary to provide a gluing device, winding equipment and battery cell that improve the above defects in order to address the problem in the prior art that the electrode material strip will be subjected to a certain tension during the tape conveying process, thereby causing a certain degree of pulling on the welding area of ​​the electrode material strip, resulting in the welding area of ​​the electrode material strip being easily torn.

[0005] A glue sticking device is used to stick a first adhesive tape and a second adhesive tape to a pole piece strip, wherein the pole piece strip has a pole ear region and a bending region adjacent to the pole ear region, and the glue sticking device comprises:

[0006] A bending mechanism, used for bending the bending area on the pole piece strip to form a wrinkled portion on one side of the pole piece strip;

[0007] a first adhesive tape mechanism, arranged at the bending mechanism, for attaching the first adhesive tape to a side of the pole piece strip away from the folded portion, so as to cover the adjacent pole ear region and the bending region on the pole piece strip; and

[0008] The second adhesive tape is arranged downstream of the bending mechanism and is used to adhere the second adhesive tape to the side of the pole piece strip away from the first adhesive tape to cover the adjacent pole ear area and the bending area on the pole piece strip.

[0009] In one embodiment, the bending mechanism includes a support platform and a pressure roller, the support platform has a bending slit, and the pressure roller is used to press the pole piece strip passing through the support platform into the bending slit to form the folded portion;

[0010] The first adhesive tape mechanism is arranged opposite to the support platform, and is used for sticking the first adhesive tape onto the pole piece strip passing through the support platform.

[0011] In one embodiment, the support platform includes a first support block and a second support block arranged downstream of the first support block, and a gap between the first support block and the second support block is the bending slit.

[0012] In one of the embodiments, the pressing roller can be further withdrawn from the pleated portion in a controlled manner.

[0013] In one embodiment, the bending mechanism further includes a bending drive assembly, and a driving end of the bending drive assembly is connected to the pressure roller to drive the pressure roller to move along a first direction and a second direction intersecting the first direction;

[0014] When the pressing roller moves along the first direction, it can press the bending area of ​​the pole sheet strip into the bending slit, and when the pressing roller moves along the second direction, it can be pulled out of the folded portion.

[0015] In one embodiment, the bending drive assembly includes a support seat, a mounting block, a first driving member and a second driving member; the mounting block is movably connected to the support seat, the first driving member is mounted on the support seat, and the driving end of the first driving member is connected to the mounting block; the second driving member is mounted on the mounting block, and the pressure roller is connected to the driving end of the second driving member;

[0016] The first driving member is used to drive the mounting block to move relative to the support seat along one of the first direction and the second direction, and the second driving member is used to drive the pressure roller to move along the other of the first direction and the second direction.

[0017] In one embodiment, the first glue applying mechanism includes a first glue applying driving component and a first glue absorbing plate connected to the driving end of the first glue applying driving component, the first glue absorbing plate and the supporting platform are arranged opposite to each other in a first direction, the first glue absorbing plate is used to absorb the first adhesive tape toward one side of the supporting platform, and the first glue applying driving component is used to drive the first glue absorbing plate to move closer to or away from the supporting platform.

[0018] In one of the embodiments, the first glue sticking driving assembly can also drive the first glue absorbing plate to adjust its position along a second direction and a third direction, and the first direction, the second direction and the third direction intersect each other.

[0019] In one of the embodiments, the glue applying device further includes a smoothing mechanism arranged downstream of the bending mechanism, and the smoothing mechanism is used to smooth the wrinkled portion passing through so that the wrinkled portion is inclined toward the surface of the pole piece strip; the second glue applying mechanism is arranged downstream of the smoothing mechanism.

[0020] In one of the embodiments, the smoothing mechanism includes a fixed seat and a smoothing roller. The smoothing roller is rotatably connected to the fixed seat and is used to roll along a side surface of the passing pole piece strip having the wrinkled portion.

[0021] In one of the embodiments, the second glue sticking mechanism includes a second glue sticking driving assembly, a second glue suction plate and a glue sticking plate; the second glue suction plate is connected to the driving end of the second glue sticking driving assembly, the second glue suction plate and the glue sticking plate are arranged opposite to each other along a first direction, and a second glue sticking channel for the electrode material strip to pass through is formed between the second glue suction plate and the glue sticking plate; the second glue suction plate is used to absorb the second adhesive tape on the side facing the glue sticking plate, and the second glue sticking driving assembly is used to drive the second glue suction plate to approach or move away from the glue sticking plate along the first direction.

[0022] In one embodiment, the second glue application driving assembly is further used to drive the second glue absorption plate to adjust its position along a second direction and a third direction, and the first direction, the second direction and the third direction intersect each other.

[0023] A winding device comprises a winding device and a gluing device as described in any of the above embodiments, wherein the winding device is arranged downstream of the second gluing mechanism and is used to wind a passing pole piece strip.

[0024] A battery cell is formed by winding a multilayer material strip including a pole piece material strip, wherein the pole piece material strip has a plurality of pole ear regions arranged at intervals along its length direction, and the pole piece material strip also has a plurality of bending regions adjacent to the plurality of pole ear regions in a one-to-one correspondence, and each of the bending regions is bent toward the same side of the pole piece material strip to form the folded portion;

[0025] The battery cell also includes a plurality of first tapes and a plurality of second tapes, each of the first tapes being located on a side of the pole piece strip away from the folded portion, and each of the first tapes being adhered to an adjacent group of the pole lug areas and the bending areas; each of the second tapes being located on a side of the pole piece strip having the folded portion, and each of the second tapes being adhered to an adjacent group of the pole lug areas and the bending areas, and each of the folded portions being attached between the pole piece strip and the corresponding second tape.

[0026] In the actual use of the above-mentioned gluing device, winding equipment and battery cell, the pole piece strip is conveyed downstream; whenever a group of adjacent pole lug areas and bending areas on the pole piece strip pass through the bending mechanism and the first gluing mechanism, the bending mechanism applies a force to the bending area, so that the pole piece strip is bent toward one side of the pole piece strip at the bending area, thereby forming a wrinkle on one side of the pole piece strip. Then, the first gluing mechanism adheres the first tape to the pole piece strip so that the first tape covers the group of pole lug areas and bending areas, so that the first tape shapes the bending area of ​​the pole piece strip to prevent the pole piece strip from being flattened after bending. Then, the pole piece strip continues to be conveyed downstream until the group of pole lug areas and bending areas reach the second gluing mechanism. At this time, the second adhesive mechanism sticks the second tape to the side of the pole piece tape away from the first tape (that is, to the side of the pole piece tape with the wrinkled portion), so that the second tape covers the group of pole ear areas and the bending area, and then under the action of the second tape, the wrinkled portion is stacked between the pole piece tape and the second tape.

[0027] In this way, the first tape and the second tape are respectively pasted on both sides of the pole piece strip by using a glue sticking device, and the first tape covers a group of adjacent pole lug areas and bending areas on the pole piece strip, and the second tape also covers the group of pole lug areas and bending areas. On the one hand, the first tape and the second tape are used to protect the pole lugs in the pole lug area, and on the other hand, since a wrinkled portion is formed between the second tape and the pole piece strip, the wrinkled portion can adaptively open and play a buffering role when the pole piece strip is pulled, that is, a certain amount of stretching is reserved, which greatly reduces the risk of the pole piece strip being torn. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front view of a glue sticking device in one embodiment of the utility model;

[0029] Figure 2 for Figure 1 A top view of the bending mechanism of the glue sticking device shown;

[0030] Figure 3 for Figure 2 The structural schematic diagram of the bending mechanism shown in another viewing angle;

[0031] Figure 4 for Figure 2 The structural schematic diagram of the bending mechanism shown in another viewing angle;

[0032] Figure 5 for Figure 1 Schematic diagram of the action process of the glue sticking device shown. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like 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 invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] See also Figure 1 and Figure 4 As shown, an embodiment of the utility model provides a winding device, including a glue sticking device and a winding device. The pole piece strip A has pole lug areas A1 arranged at intervals along its length direction, and each pole lug area A1 is welded with a pole lug B. The glue sticking device is used to stick a first tape C1 and a second tape C2 to the two sides of each pole lug area A1, respectively, to protect the pole lug B of the pole lug area A1. The winding device is used to wind a multilayer strip containing the pole piece strip A to form a battery cell. It should be noted that the pole piece strip A can be a positive pole piece, and of course it can also be a negative pole piece, which is not limited here.

[0040] In an embodiment of the present application, the pole piece strip A also has a plurality of bending regions A2 adjacent to the plurality of pole tab regions A1 in one-to-one correspondence, that is, each pole tab region A1 has a bending region A2 adjacent thereto. The gluing device comprises a bending mechanism 10, a first gluing mechanism 20 and a second gluing mechanism 30. The bending mechanism 10 is used to bend the bending region A2 on the pole piece strip A to form a wrinkle portion A3 on one side of the pole piece strip A. The first gluing mechanism 20 is arranged at the bending mechanism 10, and is used to stick the first tape C1 to the side of the pole piece strip A away from the wrinkle portion A3 to cover an adjacent group of pole tab regions A1 and bending regions A2. The second gluing mechanism 30 is arranged downstream of the bending mechanism 10, and is used to stick the second tape C2 to the side of the pole piece strip A away from the first tape C1 to cover an adjacent group of pole tab regions A1 and bending regions A2.

[0041] In the actual use of the above-mentioned gluing device, the pole piece strip A is conveyed downstream; whenever a group of adjacent pole tab areas A1 and bending areas A2 on the pole piece strip A pass through the bending mechanism 10 and the first gluing mechanism 20, the bending mechanism 10 applies a force to the bending area A2, so that the pole piece strip A is bent toward one side of the pole piece strip A at the bending area A2, thereby forming a wrinkle A3 on one side of the pole piece strip A. Then, the first gluing mechanism 20 adheres the first tape C1 to the pole piece strip A, so that the first tape C1 covers the group of pole tab areas A1 and bending areas A2, so that the first tape C1 shapes the bending area A2 of the pole piece strip A to prevent the pole piece strip A from being flattened after bending. Then, the pole piece strip A continues to be conveyed downstream until the group of pole tab areas A1 and bending areas A2 reach the second gluing mechanism 30. At this time, the second adhesive tape 30 adheres the second tape C2 to the side of the pole piece strip A away from the first tape C1 (i.e., to the side of the pole piece strip A having the folded portion A3), so that the second tape C2 covers the group of pole ear areas A1 and the bending area A2, and then under the action of the second tape C2, the folded portion A3 is stacked between the pole piece strip A and the second tape C2.

[0042] In this way, the first tape C1 and the second tape C2 are respectively pasted on both sides of the pole piece strip A by using a glue sticking device, and the first tape C1 covers a group of adjacent pole tab areas A1 and bending areas A2 on the pole piece strip A, and the second tape C2 also covers the group of pole tab areas A1 and bending areas A2. On the one hand, the first tape C1 and the second tape C2 are used to protect the pole tab B in the pole tab area A1. On the other hand, since a folded portion A3 is formed between the second tape C2 and the pole piece strip A, the folded portion A3 can be adaptively opened to play a buffering role when the pole piece strip A is pulled, that is, a certain amount of stretching is reserved, which greatly reduces the risk of the pole piece strip A being torn. It should be noted that the upstream and downstream in this article are relative to the conveying direction of the pole piece strip A, that is, the position where the pole piece strip A arrives first is the upstream, and the position where the pole piece strip A arrives later is the downstream.

[0043] See also Figures 1 to 4As shown, in the embodiment of the present application, the bending mechanism 10 includes a support platform 11 and a pressure roller 12. The support platform 11 has a bending slit 114. The pressure roller 12 is used to press the pole piece strip A passing through the support platform 11 into the bending slit 114 and form a folded portion A3. The first adhesive mechanism 20 is arranged relative to the support platform 11, and is used to stick the first adhesive tape C1 to the pole piece strip A passing through the support platform 11. In this way, whenever a group of adjacent pole lug areas A1 and bending areas A2 on the pole sheet material strip A arrives on the support platform 11: first, the pressure roller 12 presses the bending area A2 of the pole sheet material strip A until the bending area A2 of the pole sheet material strip A is pressed into the bending slit 114 on the support platform 11, that is, the bending area A2 of the pole sheet material strip A is bent into the bending slit 114 to form a folded portion A3; then, the first gluing mechanism 20 sticks the first tape C1 to the group of pole lug areas A1 and bending areas A2 of the pole sheet material strip A, that is, the first tape C1 is stuck to the side of the pole sheet material strip A away from the folded portion A3, and covers the group of pole lug areas A1 and bending areas A2; then, the pole sheet material strip A continues to be conveyed downstream.

[0044] Specifically in the embodiment, the support platform 11 includes a first support block 110 and a second support block 112 arranged downstream of the first support block 110, and the gap between the first support block 110 and the second support block 112 is the above-mentioned bending slit 114. In this way, when a group of adjacent pole ear areas A1 and bending areas A2 on the pole sheet material strip A arrives on the support platform 11, the first support block 110 and the second support block 112 are used to support the passing pole sheet material strip A, and the pole ear area A1 is located on the second support block 112, and part of the bending area A2 is located on the first support block 110, and the other part is located on the second support block 112, so that the pressure roller 12 presses the bending area A2 into the bending slit 114 between the first support block 110 and the second support block 112 and bends it to form the folded portion A3.

[0045] Specifically in the embodiment, the winding device further includes a buffer device (not shown) arranged upstream of the glue sticking device, and the buffer device is used to buffer the passing pole piece strip A. In this way, in the process of the pressing roller 12 pressing the pole piece strip A to enter the bending slit 114, under the pressing action of the pressing roller 12, the upstream buffer device releases part of the pole piece strip A, so that the bending area A2 located on the first support block 110 moves downstream and enters the bending slit 114, thereby preventing the pole ear area A1 located on the second support block 112 from moving upstream and entering the bending slit 114, thereby ensuring that the material forming the fold portion A3 is the bending area A2 of the pole piece strip A, rather than the pole ear area A1 of the pole piece strip A.

[0046] In some embodiments, the pressing roller 12 can also be controlled to be withdrawn from the folded portion A3 to avoid the pressing roller 12 being located in the folded portion A3 and preventing the pole sheet strip A from continuing to be transported downstream.

[0047] Specifically, the bending mechanism 10 also includes a bending drive assembly (not shown in the figure), the driving end of which is connected to the pressure roller 12, so that the bending drive assembly can drive the pressure roller 12 to move along the first direction X1 and the second direction X2, and the first direction X1 intersects with the second direction X2. When the pressure roller 12 moves along the first direction X1, it can press the bending area A2 of the electrode sheet strip A into the bending slit 114 to form a folded portion A3. When the pressure roller 12 moves along the second direction X2, it can be pulled out of the folded portion A3, so that the pressure roller 12 is separated from the electrode sheet strip A, and the electrode sheet strip A can continue to be transported downstream.

[0048] In this way, whenever a group of adjacent pole ear areas A1 and bending areas A2 on the pole sheet material strip A pass through the first support block 110 and the second support block 112: control the pressure roller 12 to move along the first direction X1, so that the pressure roller 12 gradually approaches the pole sheet material strip A on the first support block 110 and the second support block 112, until the bending area A2 of the pole sheet material strip A is pressed into the bending slit 114, so that the part of the pole sheet material strip A that enters the bending slit 114 is the folded portion A3; then, the first glue sticking mechanism 20 sticks the first tape C1 to the side surface of the pole sheet material strip A away from the folded portion A3, so that the first tape C1 covers the group of pole ear areas A1 and the bending area A2, from The first adhesive tape C1 shapes the bending area A2 of the pole piece material strip A to prevent the pole piece material strip A from being flattened after being bent; then, the pressure roller 12 is controlled to move along the second direction X2 until the pressure roller 12 is pulled out of the wrinkled portion A3; then, the pole piece material strip A continues to be conveyed downstream until the group of pole lug areas A1 and bending areas A2 reach the second adhesive tape mechanism 30; then, the second adhesive tape mechanism 30 sticks the second adhesive tape C2 to the side of the pole piece material strip A away from the first adhesive tape C1, so that the second adhesive tape C2 covers the group of pole lug areas A1 and bending areas A2, and then under the action of the second adhesive tape C2, the wrinkled portion A3 is stacked between the pole piece material strip A and the second adhesive tape C2.

[0049] Preferably, the first direction X1 is perpendicular to the second direction X2. It can be understood that the first direction X1 is a direction perpendicular to the pole piece strip A supported on the first support block 110 and the second support block 112, and the second direction X2 is the width direction of the pole piece strip A supported on the first support block 110 and the second support block 112. The conveying direction of the pole piece strip A is the third direction X3, and the first direction X1, the second direction X2 and the third direction X3 are perpendicular to each other. It should be noted that the verticality in this article should be understood as allowing a certain error, that is, the first direction X1, the second direction X2 and the third direction X3 are roughly perpendicular to each other.

[0050] Specifically in the embodiment, the bending drive assembly includes a support seat 13, a mounting block 14, a first driving member 15 and a second driving member 16. The first support block 110 and the second support block 112 are fixedly connected to the support seat 13. The mounting block 14 is movably connected to the support seat 13, and the first driving member 15 is installed on the support seat 13. The driving end of the first driving member 15 is connected to the mounting block 14 so that the first driving member 15 can drive the mounting block 14 to move relative to the support seat 13 along the second direction X2. The second driving member 16 is installed on the mounting block 14, and the pressure roller 12 is connected to the driving end of the second driving member 16 so that the second driving member 16 can drive the pressure roller 12 to move along the first direction X1. In this way, when the bending area A2 of the pole piece strip A needs to be pressed into the bending slit 114, the second driving member 16 drives the pressing roller 12 to gradually approach the bending slit 114 along the first direction X1 until the bending area A2 of the pole piece strip A is driven to enter the bending slit 114 to form the folded portion A3. Then, the first driving member 15 drives the mounting block 14 to move relative to the support seat 13 along the second direction X2 until the pressing roller 12 is pulled out of the folded portion A3 located in the bending slit 114, so that the pressing roller 12 is separated from the pole piece strip A. Optionally, both the first driving member 15 and the second driving member 16 can be cylinders.

[0051] Optionally, the mounting block 14 can be installed on the support seat 13 via guide components such as guide rails or guide rods, so that the movement of the mounting block 14 relative to the support seat 13 is guided by the guide components such as guide rails or guide rods, so that the movement of the pressure roller 12 driven by the mounting block 14 is more precise.

[0052] It should be noted that, in other embodiments, the first driving member 15 may drive the mounting block 14 to move along the first direction X1, and the second driving member 16 may drive the pressure roller 12 to move along the second direction X2. As long as the pressure roller 12 can be controlled to move along the first direction X1 and the second direction X2, no limitation is made here.

[0053] In an embodiment of the present application, the first glue sticking mechanism 20 includes a first glue sticking driving component 21 and a first glue suction plate 22 connected to the driving end of the first glue sticking driving component 21. The first glue suction plate 22 and the support platform 11 are arranged relative to each other in the first direction X1, so that a first glue sticking channel for the pole piece material strip A to pass through is formed between the first glue suction plate 22 and the support platform 11. The first glue suction plate 22 is used to absorb the first adhesive tape C1 on the side facing the support platform 11. The first glue sticking driving component 21 is used to drive the first glue suction plate 22 to approach or move away from the support platform 11 along the first direction X1, so as to stick the first adhesive tape C1 to the pole piece material strip A passing between the first glue suction plate 22 and the support platform 11. In this way, when a group of adjacent pole tab areas A1 and bending areas A2 on the pole piece strip A arrive on the support platform 11: first, control the pressure roller 12 to gradually approach the support platform 11 along the first direction X1, until the pressure roller 12 presses the bending area A2 of the pole piece strip A into the bending slit 114 to form a folded portion A3. Then, the first glue-applying driving component 21 drives the first glue-absorbing plate 22 to gradually approach the support platform 11 along the first direction X1, until the first adhesive tape C1 is pasted to the side of the pole piece strip A away from the support platform 11, and the first adhesive tape C1 covers the group of pole tab areas A1 and bending areas A2. Then, the first glue-applying driving component 21 drives the first adhesive-absorbing plate 22 to move away from the support platform 11 along the first direction X1, and controls the pressure roller 12 to move along the second direction X2, until the pressure roller 12 is pulled away from the folded portion A3. Then, the pole piece strip A continues to be transported downstream until the set of pole tab regions A1 and the bending region A2 on the pole piece strip A reach the second gluing mechanism 30. Then, the second gluing mechanism 30 sticks the second tape C2 to the side of the pole piece strip A away from the first tape C1, and the second tape C2 covers the set of pole tab regions A1 and the bending region A2.

[0054] Optionally, the first adhesive absorption plate 22 may be a vacuum absorption plate, that is, a negative pressure is used to absorb the first adhesive tape C1.

[0055] Furthermore, the first glue sticking driving assembly 21 can also drive the first glue absorbing plate 22 to adjust its position along the second direction X2 and the third direction X3, thereby ensuring that the first glue absorbing plate 22 can accurately stick the first adhesive tape C1 to a group of adjacent pole ear areas A1 and bending areas A2 on the pole sheet material strip A.

[0056] It should be noted that the first adhesive sticking driving component 21 can adopt a three-way driving module, as long as it can drive the first adhesive absorbing plate 22 to move along the first direction X1, the second direction X2 and the third direction X3, and realize the actions of position adjustment and sticking the first adhesive tape C1, and is not limited here.

[0057] In the embodiment of the present application, the gluing device further includes a smoothing mechanism 40 arranged downstream of the bending mechanism 10. The smoothing mechanism 40 is used to smooth the folded portion A3 passing through so that the folded portion A3 is inclined toward the surface of the pole piece strip A. The second gluing mechanism 30 is arranged downstream of the smoothing mechanism 40 so that when the second gluing mechanism 30 adheres the second adhesive tape C2 to the pole piece strip A, the folded portion A3 can be flatly attached between the second adhesive tape C2 and the pole piece strip A.

[0058] Specifically in the embodiment, the smoothing mechanism 40 includes a fixed seat 41 and a smoothing roller 42. The fixed seat 41 is fixedly connected to the above-mentioned support seat 13. The smoothing roller 42 is rotatably connected to the fixed seat 41 and is used to roll along the side surface of the passing pole sheet material strip A having the wrinkled portion A3, thereby smoothing the wrinkled portion A3.

[0059] In this way, after a group of adjacent pole ear areas A1 and bending areas A2 on the pole piece material strip A are bent and affixed with the first adhesive tape C1 at the bending mechanism 10, the pole piece material strip A passing through the smoothing roller 42 drives the smoothing roller 42 to roll, so that the smoothing roller 42 rolls along the side surface of the pole piece material strip A having the wrinkled portion A3. When the wrinkled portion A3 passes through the smoothing roller 42, the wrinkled portion A3 is attached to the surface of the pole piece material strip A under the extrusion of the smoothing roller 42. After the wrinkled portion A3 reaches the downstream of the smoothing roller 42 and separates from the smoothing roller 42, the wrinkled portion A3 will rebound, but will still maintain an inclined state inclined toward the surface of the pole piece material strip A.

[0060] When the set of pole tab regions A1 and the bending region A2 on the pole piece strip A reach the second gluing mechanism 30, the second gluing mechanism 30 sticks the second tape C2 to the side surface of the pole piece strip A with the wrinkled portion A3, and the second tape C2 covers the set of pole tab regions A1 and the bending region A2. Since the wrinkled portion A3 is in an inclined state after being smoothed, the wrinkled portion A3 is flatly attached between the pole piece strip A and the second tape C2 under the squeezing action of the second tape C2 when the second tape C2 is pasted.

[0061] It should be noted that the smoothing roller 42 is used to smooth the wrinkled portion A3 on the pole piece strip A, so that rolling friction is generated between the smoothing roller 42 and the pole piece strip A, thereby greatly reducing the risk of scratching the pole piece strip A.

[0062] In the embodiment of the present application, the second glue sticking mechanism 30 includes a second glue sticking driving assembly 31, a second glue suction plate 32 and a glue sticking plate 33 (see Figure 4). The second glue suction plate 32 is connected to the driving end of the second glue sticking driving component 31, and the glue sticking plate 33 is fixedly connected to the support seat 13. The second glue suction plate 32 and the glue sticking plate 33 are arranged relative to each other along the first direction X1, so that a second glue sticking channel for the pole piece material strip A to pass through is formed between the second glue suction plate 32 and the glue sticking plate 33. The side of the second glue suction plate 32 facing the glue sticking plate 33 is used to absorb the second adhesive tape C2. The second glue sticking driving component 31 is used to drive the second glue suction plate 32 to approach or move away from the glue sticking plate 33 along the first direction X1, so as to achieve the second adhesive tape C2 on the second glue suction plate 32 being pasted to a group of adjacent pole ear areas A1 and bending areas A2 on the pole piece material strip A passing through the second glue sticking channel, and the second adhesive tape C2 is located on the side of the pole piece material strip A having the folded portion A3.

[0063] Optionally, the second adhesive absorption plate 32 may be a vacuum absorption plate, that is, a negative pressure is used to absorb the second adhesive tape C2.

[0064] Furthermore, the second glue sticking driving assembly 31 can also drive the second glue suction plate 32 to adjust its position along the second direction X2 and the third direction X3, thereby ensuring that the second glue suction plate 32 can accurately stick the second adhesive tape C2 to a group of adjacent pole ear areas A1 and bending areas A2 on the pole sheet material strip A.

[0065] It should be noted that the second adhesive sticking driving component 31 can adopt a three-way driving module, as long as it can drive the second adhesive suction plate 32 to move along the first direction X1, the second direction X2 and the third direction X3, and realize the actions of position adjustment and sticking the second adhesive tape C2, and is not limited here.

[0066] Based on the above winding equipment, the utility model also provides a battery cell. The battery cell is formed by winding a multi-layer material strip containing a pole piece strip A. The pole piece strip A has a plurality of pole lug areas A1 arranged at intervals along its length direction, and the pole piece strip A also has a plurality of bending areas A2 adjacent to the plurality of pole lug areas A1 in a one-to-one correspondence. Under the action of the above-mentioned pressing roller 12, each bending area A2 is bent toward the same side of the pole piece strip A to form a folded portion A3.

[0067] The battery cell also includes a plurality of first adhesive tapes C1 and a plurality of second adhesive tapes C2. Under the action of the first adhesive tape 20, each first adhesive tape C1 is located on the side of the pole piece strip A away from the folded portion A3, and each first adhesive tape C1 is adhered to a group of adjacent pole lug areas A1 and bending areas A2 on the pole piece strip A. Under the action of the second adhesive tape 30, each second adhesive tape C2 is located on the side of the pole piece strip A having the folded portion A3, and each second adhesive tape C2 is adhered to a group of adjacent pole lug areas A1 and bending areas A2 on the pole piece strip A, and each folded portion A3 is attached between the pole piece strip A and the corresponding second adhesive tape C2. In this way, each pole ear area A1 on the pole piece material strip A is adjacent to a bending area A2, and is bent at the bending area A2 to form a folded portion A3. A first tape C1 and a second tape C2 are respectively pasted on both sides of a group of adjacent pole ear areas A1 and bending areas A2 on the pole piece material strip A. On the one hand, the first tape C1 and the second tape C2 are used to protect the pole ear B in the pole ear area A1; on the other hand, due to the presence of the folded portion A3 between the second tape C2 and the pole piece material strip A, the folded portion A3 can adaptively open and play a buffering role when the pole piece material strip A is pulled, that is, a certain amount of stretching is reserved, which greatly reduces the risk of the pole piece material strip A being torn.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A glue sticking device for sticking a first adhesive tape and a second adhesive tape to a pole piece strip, characterized in that: The pole piece strip has a pole ear region and a bending region adjacent to the pole ear region, and the glue sticking device includes: A bending mechanism, used for bending the bending area on the pole piece strip to form a wrinkled portion on one side of the pole piece strip; a first adhesive tape mechanism, arranged at the bending mechanism, for attaching the first adhesive tape to a side of the pole piece strip away from the folded portion, so as to cover the adjacent pole ear region and the bending region on the pole piece strip; and The second adhesive tape is arranged downstream of the bending mechanism and is used to adhere the second adhesive tape to the side of the pole piece strip away from the first adhesive tape to cover the adjacent pole ear area and the bending area on the pole piece strip.

2. The glue sticking device according to claim 1, characterized in that: The bending mechanism comprises a support platform and a pressing roller, the support platform is provided with a bending slit, and the pressing roller is used to press the pole piece strip passing through the support platform into the bending slit to form the folded portion; The first adhesive tape mechanism is arranged opposite to the support platform, and is used for sticking the first adhesive tape onto the pole piece strip passing through the support platform.

3. The glue sticking device according to claim 2, characterized in that: The support platform includes a first support block and a second support block arranged downstream of the first support block, and a gap between the first support block and the second support block is the bending slit.

4. The glue sticking device according to claim 2, characterized in that: The pressure roller can also be withdrawn from the folded portion in a controlled manner.

5. The glue sticking device according to claim 4, characterized in that: The bending mechanism further comprises a bending drive assembly, wherein a driving end of the bending drive assembly is connected to the pressing roller to drive the pressing roller to move along a first direction and a second direction intersecting the first direction; When the pressing roller moves along the first direction, it can press the bending area of ​​the pole sheet strip into the bending slit, and when the pressing roller moves along the second direction, it can be pulled out of the folded portion.

6. The glue sticking device according to claim 5, characterized in that: The bending drive assembly includes a support seat, a mounting block, a first driving member and a second driving member; the mounting block is movably connected to the support seat, the first driving member is mounted on the support seat, and the driving end of the first driving member is connected to the mounting block; the second driving member is mounted on the mounting block, and the pressure roller is connected to the driving end of the second driving member; The first driving member is used to drive the mounting block to move relative to the support seat along one of the first direction and the second direction, and the second driving member is used to drive the pressure roller to move along the other of the first direction and the second direction.

7. The adhesive laminating device according to claim 2, characterized in that: The first glue sticking mechanism includes a first glue sticking driving component and a first glue absorbing plate connected to the driving end of the first glue sticking driving component, the first glue absorbing plate and the supporting platform are arranged opposite to each other in a first direction, the first glue absorbing plate faces one side of the supporting platform and is used to absorb the first adhesive tape, and the first glue sticking driving component is used to drive the first glue absorbing plate to move closer to or away from the supporting platform.

8. The glue sticking device according to claim 7, characterized in that: The first glue sticking driving assembly can also drive the first glue absorbing plate to adjust its position along a second direction and a third direction, and the first direction, the second direction and the third direction intersect each other.

9. The adhesive laminating device according to claim 1, characterized in that: The glue-applying device further comprises a smoothing mechanism arranged downstream of the bending mechanism, and the smoothing mechanism is used to smooth the wrinkled portion passing through so as to make the wrinkled portion tilt toward the surface of the pole piece strip; the second glue-applying mechanism is arranged downstream of the smoothing mechanism.

10. The glue sticking device according to claim 9, characterized in that: The smoothing mechanism comprises a fixed seat and a smoothing roller. The smoothing roller is rotatably connected to the fixed seat and is used to roll along a side surface of the passing pole piece strip having the wrinkled portion.

11. The adhesive laminating device according to claim 1, characterized in that: The second glue sticking mechanism includes a second glue sticking driving assembly, a second glue suction plate and a glue sticking plate; the second glue suction plate is connected to the driving end of the second glue sticking driving assembly, the second glue suction plate and the glue sticking plate are arranged opposite to each other along a first direction, and a second glue sticking channel for the pole piece material strip to pass through is formed between the second glue suction plate and the glue sticking plate; the second glue suction plate is used to absorb the second adhesive tape on the side facing the glue sticking plate, and the second glue sticking driving assembly is used to drive the second glue suction plate to approach or move away from the glue sticking plate along the first direction.

12. The adhesive laminating device according to claim 11, characterized in that: The second glue sticking driving assembly is further used to drive the second glue absorbing plate to adjust its position along a second direction and a third direction, and the first direction, the second direction and the third direction intersect each other.

13. A winding device, characterized in that: It comprises a winding device and a gluing device as described in any one of claims 1 to 12, wherein the winding device is arranged downstream of the second gluing mechanism and is used to wind the pole piece strip passing through.

14. A battery cell, characterized in that: The battery cell is formed by winding a multilayer material strip including a pole piece material strip, the pole piece material strip has a plurality of pole ear regions arranged at intervals along its length direction, and the pole piece material strip also has a plurality of bending regions adjacent to the plurality of pole ear regions corresponding to each other, each of the bending regions is bent toward the same side of the pole piece material strip to form a folded portion; The battery cell also includes a plurality of first tapes and a plurality of second tapes, each of the first tapes being located on a side of the pole piece strip away from the folded portion, and each of the first tapes being adhered to an adjacent group of the pole lug areas and the bending areas; each of the second tapes being located on a side of the pole piece strip having the folded portion, and each of the second tapes being adhered to an adjacent group of the pole lug areas and the bending areas, and each of the folded portions being attached between the pole piece strip and the corresponding second tape.

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