Pole lug flattening mechanism, roller passing assembly and pole piece unwinding device

Abstract

The utility model relates to a pole lug flattening mechanism, a roller passing assembly and a pole piece unwinding device. The pole lug flattening mechanism comprises a rotating assembly and a counterweight assembly. When the diameter of a pole piece material roll on the unwinding shaft changes and the wrap angle between the pole piece material belt and the passing roller changes, the swing frame can drive the abutting piece to swing along with the pole piece material belt so that the abutting piece can abut against the pole piece material belt all the time. Due to the fact that the relative positions of the swing frame, the abutting piece and the smoothing piece are fixed, under the condition that the abutting piece keeps abutting against the pole piece material belt, the angle of the pole piece material belt penetrating through the smoothing piece does not change. Therefore, the pole piece material belt can penetrate through the smoothing piece at the preset angle all the time, and the pole lug smoothing effect in the unwinding process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery equipment technical field especially relates to a tab smoothing mechanism, passes through roller subassembly and pole piece unwinding device. BACKGROUND

[0002] In the pole piece unwinding process, due to the influence of various factors, the tab is prone to folding, thereby affecting the subsequent production efficiency and product quality. In order to avoid the problem of tab folding during unwinding, a smoothing plate is generally arranged at the first roller of the pole piece running track to guide and smooth the tab. However, the diameter of the pole piece roll changes in real time during the unwinding process, thereby causing the running direction of the pole piece to change constantly, while the angle of the smoothing plate is usually fixed, which causes the pole piece to be unable to pass through the smoothing plate at a suitable angle all the time, thereby causing poor or even ineffective tab smoothing effect. SUMMARY

[0003] Therefore, it is necessary to provide a tab smoothing mechanism, a roller assembly and a pole piece unwinding device capable of improving the tab smoothing effect during the unwinding process.

[0004] A tab smoothing mechanism comprises:

[0005] A rotating assembly comprises a swing frame, a holding piece and a smoothing piece, the swing frame is rotatably arranged around a swing axis, and the holding piece and the smoothing piece are installed on the swing frame; and

[0006] A counterweight assembly is connected to the swing frame.

[0007] In one embodiment, the swing frame comprises a first swing arm and a second swing arm, the first swing arm and the second swing arm are arranged in a spaced manner along the extension direction of the swing axis and can rotate synchronously around the swing axis, and the holding piece and the smoothing piece are distributed between the first swing arm and the second swing arm.

[0008] In one embodiment, the holding piece is a press roller rotatably installed on the swing frame, and the rotation axis of the press roller is parallel to the swing axis.

[0009] In one embodiment, the position of the smoothing piece on the swing frame is adjustable in a direction parallel to the swing axis.

[0010] In one embodiment, the first torque of the gravity of the counterweight assembly acting on the swing frame and the second torque of the gravity of the rotating assembly acting on the swing frame are in opposite directions; the swing frame can drive the holding piece and the pole piece material belt passing through the tab smoothing mechanism to abut under the joint action of the first torque and the second torque, and the pole piece material belt passes through the smoothing piece at a preset angle.

[0011] In one of the embodiments, the counterweight assembly comprises a base counterweight and an adjustable counterweight, which is capable of adjusting the magnitude of the first torque.

[0012] In one of the embodiments, the adjustable counterweight is capable of adjusting the first torque to be counteracted by the second torque, or making the sum of the first torque and the second torque less than a preset value.

[0013] In one of the embodiments, a positioning assembly is further included, which is capable of locking the swing frame and making the swing frame in the locked state unable to rotate around the swing axis.

[0014] In one of the embodiments, a mounting base is further included, the swing frame is rotatably mounted on the mounting base around the swing axis, the positioning assembly comprises an arc-shaped positioning plate fixed to the swing frame and an indexing pin mounted on the mounting base, the swing axis passes through the center of the arc-shaped positioning plate, and a plurality of positioning holes are formed along the extension direction of the arc-shaped positioning plate, the indexing pin is capable of being inserted into any of the positioning holes to lock the swing frame.

[0015] In one of the embodiments, a mounting base is further included, the swing frame is rotatably mounted on the mounting base around the swing axis.

[0016] A roller assembly comprises a roller and the tab flattening mechanism as claimed in any of the preferred embodiments, and the swing axis is consistent with the extension direction of the rotation axis of the roller.

[0017] In one of the embodiments, the roller is mounted on a fixed mandrel and is capable of rotating around the axis of the fixed mandrel, the tab flattening mechanism is mounted on the fixed mandrel and makes the swing axis coincide with the rotation axis of the roller.

[0018] In one of the embodiments, the swing frame is arranged on the fixed mandrel.

[0019] In one of the embodiments, the tab flattening mechanism comprises a mounting base, the mounting base comprises a fixing ring and a mounting plate connected to the fixing ring, the fixing ring is sleeved and fixed on the fixed mandrel, the mounting plate has a fixing hole concentric with the fixed mandrel, the rotation assembly comprises a driving shaft fixedly connected to the swing frame, and the driving shaft is rotatably mounted in the fixing hole through a bearing.

[0020] In one of the embodiments, a mounting bracket is further included, the swing frame is mounted on the mounting bracket and makes the swing axis coincide with the rotation axis of the roller.

[0021] The extreme piece unwinding device comprises an unwinding shaft and the over roller assembly as described in any one of the above preferred embodiments; wherein the tab flattening mechanism is located between the unwinding shaft and the over roller, and the swing axis is consistent with the extension direction of the rotation axis of the over roller and the unwinding shaft.

[0022] In one of the embodiments, the abutting member is a press roller rotatably mounted on the swing frame, the unwinding shaft rotates in the clockwise direction to unwind the extreme piece tape, the over roller rotates in the clockwise direction under the driving of the extreme piece tape, and the press roller rotates in the clockwise or counterclockwise direction under the driving of the extreme piece tape.

[0023] In one of the embodiments, the abutting member is a press roller rotatably mounted on the swing frame, the unwinding shaft rotates in the clockwise direction to unwind the extreme piece tape, the over roller rotates in the counterclockwise direction under the driving of the extreme piece tape, and the press roller rotates in the clockwise or counterclockwise direction under the driving of the extreme piece tape.

[0024] In one of the embodiments, the abutting member is a press roller rotatably mounted on the swing frame, the unwinding shaft rotates in the counterclockwise direction to unwind the extreme piece tape, the over roller rotates in the clockwise direction under the driving of the extreme piece tape, and the press roller rotates in the clockwise or counterclockwise direction under the driving of the extreme piece tape.

[0025] In one of the embodiments, the abutting member is a press roller rotatably mounted on the swing frame, the unwinding shaft rotates in the counterclockwise direction to unwind the extreme piece tape, the over roller rotates in the counterclockwise direction under the driving of the extreme piece tape, and the press roller rotates in the clockwise or counterclockwise direction under the driving of the extreme piece tape.

[0026] The tab flattening mechanism, the over roller assembly and the extreme piece unwinding device described above, when the diameter of the extreme piece tape roll on the unwinding shaft changes and causes the wrap angle between the extreme piece tape and the over roller to change, the swing frame can drive the abutting member to swing along with the extreme piece tape, so that the abutting member always abuts against the extreme piece tape. Since the relative positions of the swing frame, the abutting member and the flattening member are fixed, the angle of the extreme piece tape passing through the flattening member will not change when the abutting member abuts against the extreme piece tape. Therefore, the extreme piece tape can always pass through the flattening member at a preset angle, thereby improving the effect of tab flattening during unwinding. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0028] Figure 1 The structure of the extreme sheet unwinding device in one embodiment of the present application is shown in the schematic diagram.

[0029] Figure 2 The position relationship between the tab flattening mechanism and the passing roller in one position condition is shown in the schematic diagram.

[0030] Figure 3 The position relationship between the tab flattening mechanism and the passing roller in another position condition is shown in the schematic diagram.

[0031] Figure 4 The front view of the tab flattening mechanism in one embodiment of the present application is shown in the schematic diagram.

[0032] Figure 5 The right side view of the tab flattening mechanism shown in the schematic diagram. Figure 4

[0033] The back view of the tab flattening mechanism shown in the schematic diagram. Figure 6 Figure 4 The action relationship between the flattening piece and the extreme sheet material belt in the tab flattening mechanism shown in the schematic diagram.

[0034] Figure 7 Figure 4 The action relationship between the flattening piece and the extreme sheet material belt in the tab flattening mechanism shown in the schematic diagram. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0036] ​​In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0037] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0038] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0040] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, when a member is referred to as being "coupled" or "connected" to another member, it can be directly coupled or connected to the other member or intervening members can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] Referring to Figure 1 The utility model provides a kind of pole piece unwinding device 10 and tab smoothing mechanism 100. Among them, the pole piece unwinding device 10 described above includes tab smoothing mechanism 100, unwinding shaft 200 and over roller 300.

[0042] Pole piece material roll 20 can be preloaded on unwinding shaft 200, and continuous pole piece material belt 30 is unwound from unwinding shaft 200 in sequence. Pole piece material belt 20 can be transported to the next process in the preset direction after winding over roller 300 and being guided by over roller 300. Tab smoothing mechanism 100 is located between unwinding shaft 200 and over roller 300, and pole piece material belt 30 unwound from unwinding shaft 200 will first pass through tab smoothing mechanism 100 before winding over roller 300, and tab smoothing mechanism 100 will smooth tab 31 with folded edge of pole piece material belt 30.

[0043] As Figure 1 shown, unwinding shaft 200 in the embodiment rotates in counterclockwise direction to unwind pole piece material belt, and over roller 300 rotates in counterclockwise direction under the driving of pole piece material belt. Obviously, in other embodiments, according to the difference of relative position of unwinding shaft 200 and over roller 300, and the difference of belt passing direction of pole piece material belt 30 on over roller 300, the rotation direction of unwinding shaft 200 and over roller 300 also has other cases.

[0044] For example, unwinding shaft 200 rotates in counterclockwise direction to unwind pole piece material belt 30, and over roller 300 rotates in clockwise direction under the driving of pole piece material belt 30. Or, unwinding shaft 200 rotates in clockwise direction to unwind pole piece material belt 30, and over roller 300 rotates in clockwise direction under the driving of pole piece material belt 30. Or, unwinding shaft 200 rotates in clockwise direction to unwind pole piece material belt 30, and over roller 300 rotates in counterclockwise direction under the driving of pole piece material belt 30. With the continuous unwinding process, the diameter of pole piece material roll 20 will gradually become smaller, so as to cause the wrap angle between pole piece material belt 30 and over roller 300 to change continuously. In order to ensure that tab 31 is smoothly smoothed, tab smoothing mechanism 100 in the present application is designed to dynamically adjust following the belt passing direction of pole piece material belt 30, so that pole piece material belt 30 can always pass through tab smoothing mechanism 100 at the preset angle.

[0045] It should be noted that the utility model also provides a pass roller assembly (not marked in the figure), which comprises the tab flattening mechanism 100 and the pass roller 300. The tab flattening mechanism 100 and the pass roller 300 can be integrated and can be matched with different unwinding shafts 200 to realize unwinding of the tab material belt 30 as a whole.

[0046] Please refer to 4 to Figure 6 The tab flattening mechanism 100 in an embodiment of the utility model comprises a rotating assembly 110 and a counterweight assembly 120.

[0047] The rotating assembly 110 comprises a swing frame 111, a bearing piece 112 and a flattening piece 113, and the bearing piece 112 and the flattening piece 113 are both installed on the swing frame 111. The swing frame 111 plays a supporting role and can be formed of a metal material. The swing frame 111 is rotatably arranged around a swing axis, and the swing frame 111 can drive the bearing piece 112 and the flattening piece 113 to rotate synchronously by rotating around the swing axis.

[0048] The swing axis is consistent with the extension direction of the rotation axis of the pass roller 300 and the unwinding shaft 200. Specifically, in the embodiment, the unwinding shaft 200 is installed on the fixed mandrel 310 and can rotate around the axis of the fixed mandrel 310, and the tab flattening mechanism 100 is installed on the fixed mandrel 310 and makes the swing axis coincide with the rotation axis of the pass roller 300. That is to say, the tab flattening mechanism 100 and the pass roller 300 share the fixed mandrel 310 as a supporting structure, which can make the overall structure more compact.

[0049] More specifically, the swing frame 111 is also arranged on the fixed mandrel 310 and can rotate around the axis of the fixed mandrel 310, so that the swing axis coincides with the rotation axis of the pass roller 300. The swing frame 111 can be directly installed on the fixed mandrel 310 or indirectly installed on the fixed mandrel 310 through other elements.

[0050] Of course, in other embodiments, the swing frame 111 can also be installed through another mounting bracket (not shown in the figure), and the swing axis passes through the mounting bracket and coincides with the rotation axis of the pass roller 300. Since the mounting bracket is additionally arranged, the operation space is larger, which is convenient for assembly and maintenance.

[0051] The abutting member 112 can abut against the tab sheet material strip 30 passing through the tab flattening mechanism 100 and make the tab sheet material strip 30 pass through the flattening member 113 at a preset angle. In particular, in the embodiment, the abutting member 112 is a compression roller rotatably mounted on the swing frame 111, and the rotation axis of the compression roller is parallel to the swing axis. During the passing of the tab sheet material strip 30 through the tab flattening mechanism 100, the compression roller can be rotated, and the rolling friction between the compression roller and the tab sheet material strip 30 can significantly reduce the friction between the abutting member 112 and the tab sheet material strip 30, thereby avoiding causing great damage to the tab sheet material strip 30.

[0052] It should be noted that in other embodiments, the abutting member 112 can also adopt a spherical metal block, a cylindrical long rod, or the like structure, as long as it can abut against the tab sheet material strip 30 and does not damage the tab sheet material strip 30.

[0053] The tab sheet material strip 30 has two position conditions when passing through the tab flattening mechanism 100 and the passing roller 300. One position condition is shown in FIG. 6, in which the tab sheet material strip 30 simultaneously passes through the same side of the passing roller 300 and the abutting member 112, and the tab sheet material strip 30 passes below the passing roller 300 and the abutting member 112. Of course, the tab sheet material strip 30 can also pass above the passing roller 300 and the abutting member 112. Another position condition is shown in FIG. 7, in which the tab sheet material strip 30 passes between the passing roller 300 and the abutting member 112, and the tab sheet material strip 30 passes above the passing roller 300 and below the abutting member 112. Of course, the tab sheet material strip 30 can also pass below the passing roller 300 and above the abutting member 112. Figure 2 Figure 3 The tab sheet material strip 30 provides support for the abutting member 112, in particular, the compression roller. More specifically, in combination with the rotation directions of the unwinding shaft 200 and the passing roller 300, the tab unwinding device 10 has the following different working conditions. Firstly, the unwinding shaft 200 rotates in the clockwise direction to unwind the tab sheet material strip 30, and the passing roller 300 rotates in the clockwise direction under the driving of the tab sheet material strip 30. At this time, the tab sheet material strip 30 passes below the compression roller, and the tab sheet material strip 30 can better support the compression roller, and the compression roller rotates in the counterclockwise direction under the driving of the tab sheet material strip 30. Of course, the tab sheet material strip 30 can also pass above the compression roller, so that the compression roller rotates in the clockwise direction under the driving of the tab sheet material strip 30.

[0054] Secondly, the unwinding shaft 200 rotates in the clockwise direction to unwind the tab sheet material strip 30, and the passing roller 300 rotates in the counterclockwise direction under the driving of the tab sheet material strip 30. At this time, the tab sheet material strip 30 passes below the compression roller, and the tab sheet material strip 30 can better support the compression roller, and the compression roller rotates in the counterclockwise direction under the driving of the tab sheet material strip 30. Of course, the tab sheet material strip 30 can also pass above the compression roller, so that the compression roller rotates in the clockwise direction under the driving of the tab sheet material strip 30.

[0055] Secondly, the unwinding shaft 200 rotates in the clockwise direction to unwind the tab sheet material strip 30, and the passing roller 300 rotates in the counterclockwise direction under the driving of the tab sheet material strip 30. At this time, the tab sheet material strip 30 passes below the compression roller, and the tab sheet material strip 30 can better support the compression roller, and the compression roller rotates in the counterclockwise direction under the driving of the tab sheet material strip 30. Of course, the tab sheet material strip 30 can also pass above the compression roller, so that the compression roller rotates in the clockwise direction under the driving of the tab sheet material strip 30.​

[0056] Thirdly, the unwinding shaft 200 rotates in the counterclockwise direction to unwind the pole piece tape 30, and the passing roller 300 rotates in the clockwise direction under the driving of the pole piece tape 30. At this time, the pole piece tape 30 passes below the pressing roller, and the pole piece tape 30 can better support the pressing roller, and the pressing roller rotates in the clockwise direction under the driving of the pole piece tape 30. Of course, the pole piece tape 30 can also pass above the pressing roller, so that the pressing roller rotates in the counterclockwise direction under the driving of the pole piece tape 30.

[0057] Fourthly, the unwinding shaft 200 rotates in the counterclockwise direction to unwind the pole piece tape, and the passing roller 300 rotates in the counterclockwise direction under the driving of the pole piece tape. At this time, the pole piece tape 30 passes below the pressing roller, and the pole piece tape 30 can better support the pressing roller, and the pressing roller rotates in the clockwise direction under the driving of the pole piece tape 30. Of course, the pole piece tape 30 can also pass above the pressing roller, so that the pressing roller rotates in the counterclockwise direction under the driving of the pole piece tape 30. Please refer to Figure 7 , the flattening piece 113 can flatten the pole lug 31 of the pole piece tape 30. Specifically, the flattening piece 113 is generally plate-shaped and has an edge facing the feeding direction of the pole piece tape 30, and when the pole piece tape 30 passes through the flattening piece 113, the folded pole lug 31 can abut against the edge of the flattening piece 113, and as the pole piece tape 30 continues to convey, the edge of the flattening piece 113 can force the folded pole lug 31 to gradually unfold. Among them, the flattening piece 113 is generally arranged in pairs above and below, and the pole piece tape 30 can pass between the two flattening pieces 113. The lower flattening piece 113 can flatten the downwardly folded pole lug 31, and the upper flattening piece 113 can flatten the upwardly folded pole lug 31.

[0058] In this embodiment, the position of the flattening piece 113 on the swing frame 111 can be adjusted in a direction parallel to the swing axis. The extension direction of the swing axis is the width direction of the pole piece tape 30 passing through the pole lug flattening mechanism 100. By adjusting the position of the flattening piece 113 in this direction, the position of the flattening piece 113 can be better matched with the position of the pole lug 31, thereby ensuring that the flattening piece 113 can smoothly flatten the pole lug 31.

[0059] More specifically, please refer to Figure 6 , the rotating assembly 110 further includes a support plate 114 mounted on the swing frame 111, and the support plate 114 is provided with a mounting groove 1141 extending in a direction parallel to the swing axis, and the flattening piece 113 is mounted in the mounting groove 1141. The flattening piece 113 can slide along the mounting groove 1141 and be fixed at any position in the mounting groove 1141, so as to facilitate the adjustment of the position of the flattening piece 113 in the extension direction of the swing axis.

[0060] Please refer to Figure 5The counterweight assembly 120 is connected to the swing frame 111. The first torque exerted on the swing frame 111 by the weight of the counterweight assembly 120 is opposite in direction to the second torque exerted on the swing frame 111 by the weight of the rotating assembly 110. Furthermore, the swing frame 111 can rotate under the combined action of the first and second torques, causing the abutment member 112 to abut against the electrode strip 30. The first and second torques being opposite in direction means that they can respectively cause the swing frame 111 to rotate in opposite directions. During unwinding, the sum of the first and second torques should be sufficient to give the swing frame 111 a tendency to swing towards the electrode strip 30.

[0061] Thus, when the diameter of the electrode roll 20 on the unwinding shaft 200 changes and causes the wrap angle between the electrode strip 30 and the roller 300 to change, the swing frame 111 can drive the holding member 112 to swing with the electrode strip 30 so that the holding member 112 always remains in contact with the electrode strip 30.

[0062] by Figure 2 and Figure 3 As shown in the example, the electrode strip 30 passes under the abutment 112. The first torque causes the swing frame 111 to tend to swing away from the electrode strip 30 (counterclockwise), while the second torque causes the swing frame 111 to tend to swing towards the electrode strip 30 (clockwise). At this time, in order for the abutment 112 to always maintain contact with the electrode strip 30, the second torque is greater than the first torque, so that the swing frame 111 tends to swing in the clockwise direction.

[0063] When the holding member 112 abuts against the electrode strip 30, the included angle θ between the electrode strip 30 and the swing frame 111 satisfies the relationship: sinθ=(R+r) / L( Figure 2 (as shown in the position condition) or sinθ=(Rr) / L( Figure 3 (The position shown is the working condition). Here, L is the distance between the swing axis of the swing frame 111 and the center of the abutment 112, R is the radius of the roller 300, and r is the radius of the abutment 112. Since L, R, and r are all constants, regardless of the direction of the electrode strip 30 during unwinding, as long as the abutment 112 remains in contact with the electrode strip 30, the included angle θ remains constant.

[0064] The relative positions of the swing frame 111, the holding member 112, and the smoothing member 113 are fixed. With the holding member 112 in contact with the electrode strip 30, the included angle θ remains constant, so the angle at which the electrode strip 30 passes through the smoothing member 113 will not change. Therefore, the electrode strip 30 can always pass through the smoothing member 113 at a preset angle, thereby improving the smoothing effect on the electrode tab 31 during unwinding.

[0065] In addition, the first torque and the second torque can offset each other, so that the actual torque acting on the swing frame 111 is very small, and the torque acting on the holding member 112 to keep the swing frame 111 balanced is also very small. Therefore, the pressure of the holding member 112 acting on the pole strip material belt 30 is also small, so that the influence of the holding member 112 on the tension of the pole strip material belt 30 can be reduced to ensure smooth unwinding.

[0066] In the embodiment, the counterweight assembly 120 includes a basic counterweight 121 and an adjustable counterweight 122, and the adjustable counterweight 122 can adjust the size of the first torque. The basic counterweight 121 is generally fixed to the swing frame 111 and can limit the maximum torque actually acting on the swing frame 111, and the adjustable counterweight 122 can further change the first torque, so that the torque acting on the swing frame 111 can be adjusted according to the actual working condition. Specifically, the adjustable counterweight 122 can adjust the first torque by adding or reducing weight, or by changing the position to adjust the center of gravity.

[0067] Further, in the embodiment, the adjustable counterweight 122 can adjust the first torque to offset the second torque, or make the sum of the first torque and the second torque less than a preset value. The adjustable counterweight 122 can adjust the center of mass of the whole rotating assembly 110 and the counterweight assembly 120 to the swing axis, so that the first torque and the second torque are completely offset, that is, the actual torque acting on the swing frame 111 is 0. At this time, the swing frame 111 has no tendency to swing in any direction, so that the pole strip material belt 30 can be conveniently threaded or other operations such as shutdown maintenance can be performed.

[0068] In the normal unwinding process, the adjustable counterweight 122 can adjust the sum of the first torque and the second torque to be less than the preset value. At this time, the pressure of the holding member 112 acting on the pole strip material belt 30 is also less than the threshold value of the tension fluctuation of the pole strip material belt 30, so as to help maintain the tension of the pole strip material belt 30 stable.

[0069] Please refer to Figure 4 and Figure 6 In the embodiment, the swing frame 111 includes a first swing arm 1111 and a second swing arm 1112, the first swing arm 1111 and the second swing arm 1112 are arranged in a spaced manner along the extension direction of the swing axis and can synchronously rotate around the swing axis, and the holding member 112 and the flattening member 113 are distributed between the first swing arm 1111 and the second swing arm 1112.

[0070] Specifically, the first swing arm 1111 and the second swing arm 1112 can be rotatably installed at two ends of the fixed mandrel 310, so as to provide support for the swing frame 111 from two ends of the fixed mandrel 310. Moreover, by arranging the abutting member 112 and the flattening member 113 between the first swing arm 1111 and the second swing arm 1112, the center of gravity of the rotating assembly 110 as a whole can be made more centralized. In this way, the stability of the swing frame 111 during rotation around the swing axis can be improved.

[0071] In order to further balance the center of gravity of the rotating assembly 110 as a whole, in the present embodiment, the flattening member 113 is installed on one side of the second swing arm 1112, and the counterweight assembly 120 is arranged on one side of the first swing arm 1111.

[0072] Please refer again to Figures 4 to 6 In the present embodiment, the tab flattening mechanism 100 further comprises a positioning assembly 130, which can lock the swing frame 111 and make the swing frame 111 in the locked state unable to rotate around the swing axis.

[0073] During normal unwinding, the positioning assembly 130 does not lock the swing frame 111, and the swing frame 111 can rotate smoothly around the swing axis. However, during initial unwinding or during replacement of the tab material strip 30, the swing frame 111 can be fixed at a certain angle by the positioning assembly 130 to facilitate operation.

[0074] Further, in the present embodiment, the tab flattening mechanism 100 further comprises a mounting seat 140, which is fixedly connected to the fixed mandrel 310, and the swing frame 111 is rotatably mounted on the mounting seat 140 around the swing axis. The positioning assembly 130 comprises an arc-shaped positioning plate 131 fixed to the swing frame 111 and an indexing pin 132 mounted on the mounting seat 140. The swing axis passes through the center of the arc-shaped positioning plate 131, and a plurality of positioning holes 1311 are formed along the extension direction of the arc-shaped positioning plate 131. The indexing pin 132 can be inserted into any of the positioning holes 1311 to lock the swing frame 111.

[0075] After the indexing pin 132 is inserted into the positioning hole 1311, the arc-shaped positioning plate 131 will not be able to rotate relative to the mounting seat 140, thereby achieving locking of the swing frame 111. Moreover, by manually rotating the swing frame 111 and inserting the indexing pin 132 into different positioning holes 1311, the swing frame 111 can be locked at different angles, thereby facilitating flexible adjustment of the angle of the swing frame 111 according to the angle requirement of the tab material strip 30.

[0076] Further, in the embodiment, the mounting seat 140 comprises a fixing ring 141 and a mounting plate 142 connected with the fixing ring 141, the fixing ring 141 is sleeved and fixed on the fixed mandrel 310, the mounting plate 142 is provided with a fixing hole (not shown in the figure) concentric with the fixed mandrel 310, and the rotating assembly 110 comprises a driving shaft 115 fixedly connected with the swing frame 111, the driving shaft 115 is rotatably installed in the fixing hole through a bearing 116.

[0077] The bearing 116 is installed in the fixing hole, the driving shaft 115 is locked with the inner ring of the bearing 116, so that the driving shaft 115 can rotate around the swing axis, thereby enabling the swing frame 111 to rotate around the swing axis. Specifically, the driving shaft 115 is fixedly connected with the first swing arm 1111, so that the first swing arm 1111 can rotate around the swing axis, and the second swing arm 1111 can be directly rotatably connected with the fixed mandrel 310 through another bearing (not marked in the figure).

[0078] When the diameter of the jelly-roll 20 on the unwinding shaft 200 changes and causes the wrap angle between the jelly-roll 30 and the guide roller 300 to change, the swing frame 111 can drive the abutting piece 112 to swing along with the jelly-roll 30, so that the abutting piece 112 always abuts against the jelly-roll 30. Since the relative positions of the swing frame 111, the abutting piece 112 and the flattening piece 113 are fixed, the angle of the jelly-roll 30 passing through the flattening piece 113 will not change when the abutting piece 112 abuts against the jelly-roll 30. Therefore, the jelly-roll 30 can always pass through the flattening piece 113 at a preset angle, thereby improving the flattening effect of the tabs 31 during unwinding. Moreover, the torque after the first torque and the second torque cancel each other out is very small, and the pressure of the abutting piece 112 acting on the jelly-roll 30 is also small, so that the influence of the abutting piece 112 on the tension of the jelly-roll 30 can be reduced to ensure smooth unwinding.

[0079] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0080] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A tab-flush mechanism characterized by, The application relates to a tab flattening mechanism, comprising: a rotating assembly, comprising a swing frame, a pressing element and a flattening element, the swing frame is rotatably arranged around a swing axis, the pressing element and the flattening element are both mounted on the swing frame; and a counterweight assembly connected to the swing frame.

2. The tab-flush mechanism of claim 1, wherein, The swing frame comprises a first swing arm and a second swing arm, the first swing arm and the second swing arm are arranged in parallel along the extension direction of the swing axis and can rotate synchronously around the swing axis, the pressing element and the flattening element are distributed between the first swing arm and the second swing arm.

3. The tab-flush mechanism of claim 1, wherein, The pressing element is a rotatable roller mounted on the swing frame, and the rotation axis of the roller is parallel to the swing axis.

4. The tab-flush mechanism of claim 1, wherein, The position of the flattening element on the swing frame can be adjusted along the direction parallel to the swing axis.

5. The tab-flush mechanism of claim 1, wherein, The first torque of the swing frame caused by the gravity of the counterweight assembly is opposite to the second torque of the swing frame caused by the gravity of the rotating assembly; the swing frame can drive the pressing element and the tab strip passing through the tab flattening mechanism to abut against each other under the joint action of the first torque and the second torque, and the tab strip can pass through the flattening element at a preset angle.

6. The tab-flush mechanism of claim 5, wherein, The counterweight assembly comprises a basic counterweight and an adjustable counterweight, and the adjustable counterweight can adjust the size of the first torque.

7. The tab-flush mechanism of claim 6, wherein, The adjustable counterweight can adjust the first torque to be opposite to the second torque, or the sum of the first torque and the second torque is less than a preset value.

8. The tab-flush mechanism of claim 1, wherein, The application further comprises a positioning assembly, which can lock the swing frame and make the swing frame in the locked state unable to rotate around the swing axis.

9. The tab-flush mechanism of claim 8, wherein, The swing frame is rotatably arranged around the swing axis on the mounting seat, the positioning assembly comprises an arc-shaped positioning plate fixed to the swing frame and a indexing pin mounted on the mounting seat, the swing axis passes through the center of the arc-shaped positioning plate, and a plurality of positioning holes are formed on the arc-shaped positioning plate along the extension direction of the arc-shaped positioning plate, and the indexing pin can be inserted into any one of the positioning holes to lock the swing frame.

10. The tab-flush mechanism of claim 1, wherein, The swing frame is rotatably arranged around the swing axis on the mounting seat.

11. A roll-over assembly characterized by, The application comprises a roller and the tab flattening mechanism according to any one of claims 1 to 10, and the extension direction of the swing axis is consistent with the rotation axis of the roller.

12. The roll assembly of claim 11, wherein, The roller is mounted on a fixed mandrel and can rotate around the axis of the fixed mandrel, the tab flattening mechanism is mounted on the fixed mandrel, and the swing axis is consistent with the rotation axis of the roller.

13. The roll assembly of claim 12, wherein, The swing frame is arranged on the fixed mandrel.

14. The roll assembly of claim 12, wherein, The tab flattening mechanism comprises a mounting seat, the mounting seat comprises a fixing ring and a mounting plate connected to the fixing ring, the fixing ring is sleeved and fixed on the fixed mandrel, the mounting plate is provided with a fixing hole concentric with the fixed mandrel, the rotating assembly comprises a driving shaft fixedly connected to the swing frame, and the driving shaft is rotatably arranged in the fixing hole through a bearing.

15. The roll assembly of claim 11, wherein, The swing frame is mounted on the mounting support and the swing axis is consistent with the rotation axis of the roller.

16. An electrode tab unwinding device, characterized by, The winding-off shaft and the over roller assembly as claimed in any one of claims 11 to 15; wherein the tab flattening mechanism is located between the winding-off shaft and the over roller, and the swing axis is consistent with the extension direction of the rotation axis of the over roller and the winding-off shaft.

17. The pole piece unwinding device of claim 16, wherein The abutting member is a pressure roller rotatably mounted on the swing frame, the winding-off shaft rotates in the clockwise direction to unwind the tab material strip, the over roller rotates in the clockwise direction under the drive of the tab material strip, and the pressure roller rotates in the clockwise or counterclockwise direction under the drive of the tab material strip.

18. The pole piece unwinding device of claim 16, wherein, The abutting member is a pressure roller rotatably mounted on the swing frame, the winding-off shaft rotates in the clockwise direction to unwind the tab material strip, the over roller rotates in the counterclockwise direction under the drive of the tab material strip, and the pressure roller rotates in the clockwise or counterclockwise direction under the drive of the tab material strip.

19. The pole piece unwinding device of claim 16, wherein, The abutting member is a pressure roller rotatably mounted on the swing frame, the winding-off shaft rotates in the clockwise direction to unwind the tab material strip, the over roller rotates in the counterclockwise direction under the drive of the tab material strip, and the pressure roller rotates in the clockwise or counterclockwise direction under the drive of the tab material strip.

20. The pole piece unwinding device of claim 16, wherein, The abutting member is a pressure roller rotatably mounted on the swing frame, the winding-off shaft rotates in the clockwise direction to unwind the tab material strip, the over roller rotates in the counterclockwise direction under the drive of the tab material strip, and the pressure roller rotates in the clockwise or counterclockwise direction under the drive of the tab material strip. The abutting member is a pressure roller rotatably mounted on the swing frame, the winding-off shaft rotates in the clockwise direction to unwind the tab material strip, the over roller rotates in the counterclockwise direction under the drive of the tab material strip, and the pressure roller rotates in the clockwise or counterclockwise direction under the drive of the tab material strip.

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