A battery core processing system

Abstract

The present invention relates to the field of battery manufacturing technology, and provides a battery cell processing system, which includes a frame and a winding device, a conveying device and a tab bending device connected to the frame. The tab bending device can roll and bend the tabs of the pole sheet material strip in the belt-walking process without stopping before winding, and smooth the bent tabs on the winding needle through the tab smoothing mechanism when the pole sheet material strip is wound. The bent tabs can effectively eliminate the impact on the tabs at the tab smoothing mechanism when the winding core is wound, and the tabs are bent toward the inner side of the pole sheet material strip, which helps the tab smoothing mechanism to smooth the tabs toward the same side. After the tabs are smoothed, the tabs can effectively avoid the undesirable phenomena such as folding, wrinkling, and disorder of the tabs during the winding process, thereby achieving the purpose of not damaging the tabs, thereby improving the winding quality of the winding core, and helping to improve the production efficiency of the battery cell.

Description

Technical Field

[0001] The present invention relates to the field of battery manufacturing, and in particular to a battery core processing system. Background Art

[0002] With the rapid development of lithium batteries, higher requirements are placed on battery production efficiency and product quality. In the battery manufacturing process, the winding efficiency of the battery cell and the quality after winding are the key factors affecting the battery production efficiency and product quality. In related technologies, it is very easy for the tabs to fold, wrinkle, or become disordered when the battery cells are wound, which can cause damage to the tabs, resulting in poor quality of the finished battery or even scrapping, thus affecting production efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery cell processing system that can effectively avoid damage to the tabs and help improve the production efficiency and quality of the battery cells.

[0004] A battery core processing system according to an embodiment of the present invention includes:

[0005] A winding device, comprising a winding mechanism and a tab smoothing mechanism, wherein the winding mechanism comprises a winding needle and a winding needle driving assembly for driving the winding needle to rotate, wherein the winding needle is used to wind the pole piece strip and the diaphragm strip to form a winding core, wherein the pole piece strip has an inner side and an outer side, and when winding, the inner side of the pole piece strip faces the winding needle, and the tab smoothing mechanism is used to smooth the tab of the winding core toward the end of the winding core;

[0006] A conveying device, used for conveying the pole piece material strip and the diaphragm material strip to the winding needle respectively;

[0007] a tab bending device, arranged on the conveying path of the pole sheet material strip, and used for bending the tab of the pole sheet material strip toward the inner side before the pole sheet material strip is rolled; and

[0008] A frame, the winding device, the conveying device and the tab bending device are all connected to the frame.

[0009] The battery cell processing system of the embodiment of the present invention has at least the following beneficial effects: the pole ear bending device can roll and bend the pole ear of the pole sheet material strip during the tape walking process without stopping before winding, and the pole ear smoothing mechanism can smooth the bent pole ear on the winding needle when the pole sheet material strip is wound. The bent pole ear can effectively eliminate the impact on the pole ear at the pole ear smoothing mechanism when the winding core is wound, and the pole ear is bent toward the inner side of the pole sheet material strip, which helps the pole ear smoothing mechanism to smooth the pole ear on the same side. After the pole ear is smoothed, it can effectively avoid the undesirable phenomena such as folding, wrinkling, and disorder of the pole ear during the winding process, thereby achieving the purpose of not damaging the pole ear, thereby improving the winding quality of the winding core, and helping to improve the production efficiency of the battery cell.

[0010] According to some embodiments of the present invention, the pole lug smoothing mechanism includes a bracket and a first guide mechanism, the bracket is connected to the frame, the bracket is provided with a mounting portion, the first guide mechanism includes a fixing member, the fixing member is located at the protruding end of the pole lug of the winding core and is connected to the mounting portion, along the circumference of the winding needle, the fixing member includes a feed end and a discharge end, the pole lug of the winding core can enter from the feed end between the fixing member and the end of the winding core and move out from the discharge end as the winding needle rotates, and the fixing member is used to smooth the pole lug of the winding core toward the end of the winding core.

[0011] According to some embodiments of the present invention, the fixing member has a guide surface on one side of the end portion of the winding core, and the distance between the guide surface and the end portion of the winding core gradually decreases from the feeding end to the discharging end, and the guide surface is used to smooth the pole ear of the winding core toward the end portion of the winding core.

[0012] According to some embodiments of the present invention, the pole lug smoothing mechanism also includes a second guiding mechanism, which includes a movable part and a driving assembly, and the movable part is arranged on one side of the winding needle corresponding to the end of the winding core with the pole lug, and the movable part includes a connecting part and a guiding part, and the connecting part is connected to the mounting part, and the guiding part is located on one side of the feeding end, and can be shielded between the pole lug of the winding core and the pole lug of the pole sheet strip at the junction of the winding core and the pole sheet strip to be wound, and the driving assembly is used to drive the movable part to move relative to the fixed part until the guide part is located at the junction.

[0013] According to some embodiments of the present invention, the driving assembly includes a driving element and a connecting plate, the connecting plate is connected to the mounting portion, the connecting plate is provided with a guide groove, the connecting portion is connected to a guide column, the guide column is passed through the guide groove and can move along the guide groove, the driving element is used to drive the connecting portion to move, and the guide groove is used to limit the moving path of the guide column.

[0014] According to some embodiments of the present invention, the pole ear bending device includes a roller mechanism and a roller clamping mechanism, the roller mechanism is used to support the outer side of the pole sheet material strip and convey the pole sheet material strip, the roller mechanism is provided with a die at a position corresponding to the pole ear of the pole sheet material strip, the opening of the die is facing the inner side of the pole sheet material strip, and the roller clamping mechanism corresponds to the position of the die, and is used to roll and bend the pole ear located on the die.

[0015] According to some embodiments of the present invention, the pole ear bending device also includes a mounting base and a pressure roller clamping mechanism, the pressure roller clamping mechanism and the over-rolling mechanism are both arranged on the mounting base, the pressure roller clamping mechanism is used to press the pole piece strip onto the over-rolling mechanism, the roller clamping mechanism is arranged on the pressure roller clamping mechanism, and the over-rolling mechanism, the roller clamping mechanism and the pole piece strip can move at equal linear speeds.

[0016] According to some embodiments of the present invention, the pressing roller pressing mechanism comprises:

[0017] A first driving member, wherein an upper end of the first driving member is connected to the mounting base, and the first driving member has a first output end;

[0018] A support, wherein the support is arranged at the first output end, the roller mechanism is located below the support, and the first driving member drives the support to move in a vertical direction; and

[0019] A first roller is rotatably disposed at the lower end of the support.

[0020] According to some embodiments of the present invention, the roller pressing mechanism includes:

[0021] A second driving member, the second driving member is disposed on the support, and the second driving member has a second output end;

[0022] A first connecting member, the first connecting member having a first connecting end and a second connecting end, the first connecting end being rotatably connected to the support, the first roller being disposed on the first connecting end, and the second connecting end being rotatably connected to the second output end; and

[0023] The second roller is arranged on the second connecting end, a convex die is arranged on the second roller, the second driving member drives the second roller to press the pole ear in the vertical direction, and the second roller can roll and bend the pole ear between the convex die and the concave die.

[0024] According to some other embodiments of the present invention, the roller pressing mechanism includes:

[0025] A second driving member, the second driving member is disposed on the support, and the second driving member has a second output end;

[0026] A motor, wherein the motor is arranged on the support and has a third output terminal;

[0027] A first connecting member, one end of which is fixedly connected to the third output end, and the other end of which is rotatably connected to the second output end; and

[0028] The second roller is arranged on the first connecting member, a convex mold is arranged on the second roller, the motor drives the second roller to rotate through the first connecting member, the second driving member drives the second roller to press the pole ear in the vertical direction, and the second roller can roll and bend the pole ear between the convex mold and the concave mold.

[0029] According to some other embodiments of the present invention, the roller pressing mechanism includes:

[0030] A second driving member, the second driving member is disposed on the support, and the second driving member has a second output end;

[0031] A first connecting member, wherein the first connecting member is rotatably disposed on the support;

[0032] A transmission member, wherein one end of the first connection member is rotatably connected to the second output end, the other end of the first connection member is connected to the transmission member, and the first connection member is connected to the roller mechanism through the transmission member; and

[0033] The second roller is arranged on the first connecting member, a punch is arranged on the second roller, the second roller rotates synchronously with the roller mechanism through the transmission member, the second driving member drives the second roller to press the pole ear in the vertical direction, and the second roller can roll and bend the pole ear between the punch and the die.

[0034] According to some embodiments of the present invention, tensioning rollers are provided on one side or both sides of the pole tab bending device along the conveying path of the pole sheet material strip, for tensioning the pole sheet material strip passing through the pole tab bending device.

[0035] According to some embodiments of the present invention, the conveying device includes:

[0036] A positive electrode sheet conveying mechanism, used for conveying the positive electrode sheet strip to the winding needle;

[0037] A negative electrode sheet conveying mechanism is used to convey the negative electrode sheet material strip to the winding needle, the positive electrode lugs on the positive electrode sheet material strip and the negative electrode lugs on the negative electrode sheet material strip are respectively oriented in opposite directions along the axial direction of the winding needle, and the positive electrode lugs and negative electrode lugs wound on the winding needle are respectively oriented toward the two ends of the winding core;

[0038] A first diaphragm conveying mechanism is used to convey the diaphragm material strip to the winding needle between the positive electrode sheet material strip and the negative electrode sheet material strip; and

[0039] The second diaphragm conveying mechanism is used to convey the diaphragm material strip to the winding needle between the pole piece material strip and the winding needle.

[0040] According to some embodiments of the present invention, the winding needle is used to wind the positive electrode sheet material strip, the negative electrode sheet material strip and the separator sheet material strip to form a winding core, the positive electrode sheet material strip and the negative electrode sheet material strip respectively have an inner side and an outer side, and when winding, the inner sides of the positive electrode sheet material strip and the negative electrode sheet material strip face the winding needle;

[0041] The winding device is provided with the tab smoothing mechanism at both ends of the winding core, respectively, for smoothing the positive tabs and negative tabs at both ends of the winding core toward the end of the winding core;

[0042] The tab bending device is provided on the conveying path of the positive electrode sheet material strip, and is used to fold the positive electrode tab toward the inner side of the positive electrode sheet material strip;

[0043] The tab bending device is also provided on the conveying path of the negative electrode sheet material strip, and is used to bend the negative electrode tab toward the inner side of the negative electrode sheet material strip.

[0044] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0046] Figure 1 It is a structural schematic diagram of a battery core processing system according to an embodiment of the present invention;

[0047] Figure 2 Schematic diagram of the structure of the tab bending device in an embodiment of the present invention;

[0048] Figure 3 It is a schematic structural diagram of a tab bending device (with a motor added) in an embodiment of the present invention;

[0049] Figure 4 It is a structural schematic diagram of a tab bending device (with a transmission member added) in another embodiment of the present invention;

[0050] Figure 5 A partial structural schematic diagram of a concave die and a convex die in a tab bending device in an embodiment of the present invention;

[0051] Figure 6 It is another partial schematic diagram of the structure of the female die and the male die in the tab bending device in the embodiment of the present invention;

[0052] Figure 7 It is another partial schematic diagram of the structure of the female die and the male die in the tab bending device in the embodiment of the present invention;

[0053] Figure 8 is a schematic diagram of a winding device in one embodiment of the present invention;

[0054] Fig. 9 for Figure 8 A front view of

[0055] Fig.10 for Fig. 9 A-direction schematic diagram;

[0056] Fig.11 for Fig.10 A local enlarged schematic diagram of point B in FIG.

[0057] Fig.12 is a schematic structural diagram of a fixing member in one embodiment of the present invention;

[0058] Fig.13 It is a structural schematic diagram of a movable part in one embodiment of the present invention;

[0059] Fig.14 Schematic diagram showing that the joint between the pole piece strip and the winding core changes position as the thickness of the winding core increases.

[0060] Reference numerals:

[0061] Winding core 1, pole piece strip 2, pole ear 3, diaphragm strip 4;

[0062] Winding device 100;

[0063] Winding needle 110, bracket 120, first guide mechanism 130, fixing member 131, feeding end 132, discharging end 133, guide surface 134, second guide mechanism 140, movable member 141, connecting portion 142, guiding portion 143, guiding edge 144, shielding surface 145, driving assembly 146, gear 1461, rack 1462, connecting plate 147, guide groove 148, guide column 149, joint 150, joint position change curve 151;

[0064] Conveying device 200;

[0065] A positive electrode sheet conveying mechanism 210, a negative electrode sheet conveying mechanism 220, a first diaphragm conveying mechanism 230, a second diaphragm conveying mechanism 240, and a tensioning roller 250;

[0066] Tab bending device 300;

[0067] Install the base 310, the roller mechanism 320, the die 321, the roller wheel 322, the roller shaft 323, the pressure roller clamping mechanism 330, the first driving member 331, the first output end 3311, the support 332, the first roller 333, the roller clamping mechanism 340, the second driving member 341, the second output end 3411, the first connecting member 342, the first connecting end 3421, the second connecting end 3422, the second roller 343, the punch 3431, the first motor 344, the third output end 3441, the transmission member 345, the first gear 3451, and the second gear 3452. DETAILED DESCRIPTION

[0068] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0069] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are 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 device or element referred to 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.

[0070] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0071] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0072] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0073] Figure 1 This is a schematic diagram of the structure of the battery cell processing system according to an embodiment of the present invention, referring to Figure 1 The embodiment of the present invention provides a battery cell processing system, including a frame and a winding device 100 connected to the frame, a conveying device 200 and a tab bending device 300. The winding device 100 includes a winding mechanism and a tab smoothing mechanism. The winding mechanism includes a winding needle 110 and a winding needle 110 driving assembly 146 for driving the winding needle 110 to rotate. The winding needle 110 is used to wind the pole piece strip 2 and the diaphragm strip 4 to form a winding core 1. The pole piece strip 2 has an inner side and an outer side. When winding, the inner side of the pole piece strip 2 faces the winding needle 110. The tab smoothing mechanism is used to smooth the tab 3 of the winding core 1 toward the end of the winding core 1. The conveying device 200 is used to convey the pole sheet material strip 2 and the diaphragm material strip 4 to the winding needle 110 respectively. The pole tab bending device 300 is arranged on the conveying path of the pole sheet material strip 2. The pole tab bending device 300 is used to bend the pole tab 3 of the pole sheet material strip 2 inward before the pole sheet material strip 2 is rolled. During the winding process, the pole ear bending device 300 can roll and bend the pole ear 3 of the pole sheet material strip 2 during the tape walking process without stopping before winding, and smooth the bent pole ear 3 on the winding needle 110 through the pole ear smoothing mechanism when the pole sheet material strip 2 is wound. The bent pole ear 3 can effectively eliminate the impact on the pole ear 3 at the pole ear smoothing mechanism when the winding core 1 is wound, and the pole ear 3 is bent toward the inner side of the pole sheet material strip 2, which helps the pole ear smoothing mechanism to smooth the pole ear 3 on the same side. After the pole ear 3 is smoothed, it can effectively avoid the undesirable phenomena such as folding, wrinkling, and disorder of the pole ear 3 during the winding process, thereby achieving the purpose of not damaging the pole ear 3, thereby improving the winding quality of the winding core 1, and helping to improve the production efficiency of the battery cell.

[0074] Figures 2 to 7 FIG. 2 shows a schematic diagram of the structure of the tab bending device in some embodiments. Figure 2In some embodiments, the pole tab bending device 300 includes a roller mechanism 320 and a roller clamping mechanism 340. The roller mechanism 320 is used to support the outer side of the pole sheet material strip 2 and convey the pole sheet material strip 2. A die 321 is provided at the position of the pole tab 3 of the pole sheet material strip 2 on the roller mechanism 320. The opening of the die 321 faces the inner side of the pole sheet material strip 2. The roller clamping mechanism 340 corresponds to the position of the die 321 and is used to roll and bend the pole tab 3 located on the die 321. As a result, the pole tab 3 of the pole sheet material strip 2 can be bent toward the inner side of the pole sheet material strip 2. After the pole sheet material strip 2 is rolled into and forms a winding core 1 on the winding needle 110, the pole tab 3 facing the inner side of the pole sheet material strip 2 is bent toward the direction of the winding needle 110, which can effectively avoid folding outward with the rotation of the winding core 1, so that the pole tab smoothing mechanism at the winding device 100 can squeeze the end face of the winding core 1 on the same side to avoid damage to the pole tab 3.

[0075] Reference Figure 2 In some embodiments, the tab bending device 300 further includes a mounting base 310 and a roller clamping mechanism 330. The roller clamping mechanism 330 and the over-rolling mechanism 320 are both arranged on the mounting base 310. The roller clamping mechanism 330 is used to press the pole piece strip 2 onto the over-rolling mechanism 320. The roller clamping mechanism 340 is arranged on the roller clamping mechanism 330. The over-rolling mechanism 320, the roller clamping mechanism 340 and the pole piece strip 2 can move at equal linear speeds. The roller clamping mechanism 330 is located on the side of the over-rolling mechanism 320 facing the inner side of the pole piece strip 2. The roller clamping mechanism 330 can apply pressure from the inner side of the pole piece strip 2, so that the roller clamping mechanism 330 can press the pole piece strip 2 onto the over-rolling mechanism 320. The roller clamping mechanism 340 is arranged on the pressure roller clamping mechanism 330, and the roller clamping mechanism 340 is located at the position of the pressure roller clamping mechanism 330 corresponding to the pole ear 3. When the roller clamping mechanism 340 rolls and bends the pole ear 3 located on the die 321, the pressure roller clamping mechanism 330 and the roller clamping mechanism 340 are in contact with the inner side of the pole sheet material strip 2, and the over-rolling mechanism 320 is in contact with the outer side of the pole sheet material strip 2, so that the pole sheet material strip 2 can drive the over-rolling mechanism 320, the pressure roller clamping mechanism 330 and the roller clamping mechanism 340 to move at the same linear speed during the movement. As a result, the pole ear 3 can be bent without stopping during the running of the pole sheet material strip 2, which helps to eliminate the impact at the bending position of the pole ear 3, thereby achieving the purpose of not damaging the pole ear 3.

[0076] Reference Figures 2 to 4In some embodiments, the roller pressing mechanism 330 includes a first driving member 331, a support 332, and a first roller 333. The upper end of the first driving member 331 is connected to the mounting base 310, the first driving member 331 has a first output end 3311, the support 332 is arranged at the first output end 3311, the roller mechanism 320 is located below the support 332, the first driving member 331 can drive the first output end 3311 to move up and down in the vertical direction, the first roller 333 is arranged at the lower end of the support 332, and the first roller 333 is rotatably connected to the support 332. It can be understood that the first driving member 331 can drive the first roller 333 to move downward to press the inner side of the pole piece strip 2, and the roller mechanism 320 supports the outer side of the pole piece strip 2. When the pole piece strip 2 moves, the pole piece strip 2 drives the roller mechanism 320 and the first roller 333 to rotate synchronously, so that the first roller 333 and the roller mechanism 320 rotate at the same linear speed, and the pressure roller clamping mechanism 330, the roller clamping mechanism 340 and the pole piece strip 2 move at the same linear speed, thereby making the contact surface between the roller mechanism 320, the first roller 333 and the pole piece strip 2 able to rotate at the same linear speed.

[0077] Reference Figure 2In some embodiments, the roller pressing mechanism 340 includes a second driving member 341, a first connecting member 342, and a second roller 343. The second driving member 341 is disposed on the support 332, the second driving member 341 is located at the left end of the support 332, the second driving member 341 has a second output end 3411, and the second driving member 341 can drive the second output end 3411 to move up and down in the vertical direction. The first connecting member 342 has a first connecting end 3421 and a second connecting end 3422, the first connecting end 3421 is located at the right end of the first connecting member 342, the second connecting end 3422 is located at the left end of the first connecting member 342, the first connecting end 3421 is rotatably connected to the support 332, the second connecting end 3422 is rotatably connected to the second roller 343, the first roller 333 is disposed on the first connecting end 3421, the second roller 343 is disposed at the second connecting end 3422, and the first roller 333 and the second roller 343 are fixedly connected to the first connecting member 342. The second roller 343 is provided with a punch 3431 on its wheel surface, and the punch 3431 can be pressed into the die 321. The second driving member 341 can drive the second roller 343 to move vertically downward. The wheel surface of the second roller 343 presses the inner side of the pole piece strip 2. The roller mechanism 320 supports the outer side of the pole piece strip 2. The punch 3431 moves downward to press the pole ear 3 into the die 321. When the pole piece strip 2 moves, the pole piece strip 2 drives the roller mechanism 320 and the first roller 3 33 rotates synchronously, so that the first roller 333 and the roller mechanism 320 rotate at the same linear speed, and the second roller 343 rotates coaxially with the first roller 333 through the first connecting member 342. Driven by the pole piece material strip 2, the first roller 333, the second roller 343 and the roller mechanism 320 rotate at the same linear speed, so that the pole piece material strip 2 does not stop during the tape walking process and can bend the pole ear 3, thereby eliminating the impact on the bending position of the pole ear 3, thereby achieving the purpose of not damaging the pole ear 3.

[0078] Reference Figure 3In other embodiments, the roller pressing mechanism 340 includes a second driving member 341, a first motor 344, a first connecting member 342, and a second roller 343. The second driving member 341 is disposed on the support 332, the second driving member 341 is located at the left end of the support 332, and the second driving member 341 has a second output end 3411, and the second driving member 341 can drive the second output end 3411 to move up and down in the vertical direction. The first motor 344 is arranged on the support 332, and the first motor 344 has a third output terminal 3441. The left end of the first connecting member 342 is fixedly connected to the third output terminal 3441, and the right end of the first connecting member 342 is rotatably connected to the second output terminal 3411. The second roller 343 is arranged on the first connecting member 342. The first motor 344 drives the second roller 343 to rotate through the first connecting member 342. A punch 3431 is arranged on the wheel surface of the second roller 343, and the punch 3431 can be pressed into the die 321. The second driving member 341 can drive the second roller 343 to move vertically downward. The second driving member 341 is used to drive the second roller 343 to press the pole ear 3. When the pole piece strip 2 moves, the pole piece strip 2 drives the roller mechanism 320 and the first roller 333 to rotate synchronously. The first motor 344 drives the second roller 343 and the pole piece strip 2 to rotate synchronously, so that the first roller 333, the second roller 343 and the roller mechanism 320 rotate at the same linear speed. The first motor 344 is used to drive the second roller 343, the pole piece strip 2, the roller mechanism 320 and the first roller 333 to move at the same linear speed, so that the second roller 343 can roll and bend the pole ear 3 between the punch 3431 and the die 321.

[0079] Reference Figure 4In other embodiments, the roller pressing mechanism 340 includes a second driving member 341, a first connecting member 342, a transmission member 345, and a second roller 343. The second driving member 341 is disposed on the support 332, the second driving member 341 is located at the left end of the support 332, and the second driving member 341 has a second output end 3411, and the second driving member 341 can drive the second output end 3411 to move up and down in the vertical direction. The right end of the first connecting member 342 is rotatably connected to the second output end 3411, the left end of the first connecting member 342 is rotatably connected to the support 332, the upper end of the transmission member 345 is connected to the first connecting member 342, and the lower end of the transmission member 345 is connected to the roller mechanism 320. The second roller 343 is arranged at the right end of the first connecting member 342, and a punch 3431 is arranged on the wheel surface of the second roller 343, and the punch 3431 can be pressed into the die 321, and the second driving member 341 can drive the second roller 343 to move vertically downward. When the pole piece material strip 2 moves, the pole piece material strip 2 drives the roller mechanism 320 to rotate, and the roller mechanism 320 drives the first roller 333 to rotate synchronously, and the second roller 343 rotates synchronously with the roller mechanism 320 through the transmission member 345, so that the first roller 333, the second roller 343 and the roller mechanism 320 rotate at the same linear speed, and the second driving member 341 drives the second roller 343 to press the pole ear 3 in the vertical downward direction, so that the second roller 343 can roll and bend the pole ear 3 located between the punch 3431 and the die 321, so that the pole piece material strip 2 can bend the pole ear 3 without stopping during the belt walking process, eliminate the impact on the bending position of the pole ear 3, and thus achieve the purpose of not damaging the pole ear 3.

[0080] It should be noted that, in some embodiments, the first driving member 331 and the second driving member 341 are both cylinders (not shown in the figure) or motors (not shown in the figure). It is understandable that the cylinder can quickly drive the output end and can provide sufficient downward pressure for the first roller 333 and the second roller 343, so that the first roller 333, the second roller 343 and the roller mechanism 320 can move at the same linear speed through the friction force with the pole piece strip 2. The motor can stably drive the output end and can provide stable downward pressure for the first roller 333 and the second roller 343.

[0081] Reference Figure 4In some embodiments, the transmission member 345 includes a first gear 3451 and a second gear 3452, the roller mechanism 320 includes a roller wheel 322 and a roller shaft 323, the first gear 3451 is set on the first connecting member 342, the first gear 3451 is fixedly connected to the left end of the first connecting member 342, the second gear 3452 is set on the roller shaft 323, the second gear 3452 is connected to the left end of the roller shaft 323, the first gear 3451 and the second gear 3452 are meshed and connected, so that the first roller 333 and the roller wheel 322 rotate synchronously. The right end of the roller shaft 323 is rotatably connected to the mounting base 310, the roller wheel 322 is arranged on the roller shaft 323, and the die 321 is arranged on the surface of the left end of the roller wheel 322. The first roller 333 can press the pole ear 3 on the surface of the right end of the roller wheel 322, and the second roller 343 can press the pole piece strip 2 on the surface of the roller wheel 322, so that the second roller 343, the roller wheel 322, the first roller 333 and the pole piece strip 2 move at the same linear speed.

[0082] Reference Figures 5 to 7 In some embodiments, the shapes of the male mold 3431 and the female mold 321 can be customized according to the shape of the tab 3, and the shapes of the male mold 3431, the female mold 321 and the tab 3 include a circle, an inverted triangle and an inverted trapezoid. It should be noted that the shapes of the male mold 3431, the female mold 321 and the tab 3 in the above examples can be a circle, an inverted triangle or an inverted trapezoid, just to better illustrate that the male mold 3431 and the female mold 321 have the characteristics of being customized according to the shape of the tab 3, rather than indicating or implying that the shapes of the male mold 3431, the female mold 321 and the tab 3 can only be a circle, an inverted triangle and an inverted trapezoid, and therefore cannot be understood as a limitation of the present invention.

[0083] In some embodiments, tensioning rollers 250 are provided on one or both sides of the pole tab bending device 300 along the conveying path of the pole sheet strip 2, which are used to tension the pole sheet strip 2 passing through the pole tab bending device 300 to prevent the pole sheet strip 2 from loosening and causing wrinkles, which would affect the bending of the pole tab 3 and the conveying of the pole sheet strip 2.

[0084] Figures 8 to 14 Schematic diagram of the tab smoothing mechanism in some embodiments is shown. Figures 8 to 11In some embodiments, the tab smoothing mechanism includes a bracket 120 and a first guide mechanism 130. The bracket 120 is connected to the frame. The bracket 120 is provided with a mounting portion. The first guide mechanism 130 includes a fixing member 131. The fixing member 131 is located at the protruding end of the tab 3 of the winding core 1 and is connected to the mounting portion. Along the circumference of the winding needle 110, the fixing member 131 includes a feeding end 132 and a discharging end 133. The tab 3 of the winding core 1 can enter between the fixing member 131 and the end of the winding core 1 from the feeding end 132 and move out from the discharging end 133 as the winding needle 110 rotates. The fixing member 131 is used to smooth the tab 3 of the winding core 1 toward the end of the winding core 1.

[0085] Among them, the fixing part 131 has a guide surface 134 on the side facing the pole ear 3, thereby, a channel for the pole ear 3 to pass through is formed between the guide surface 134 and the end of the winding core 1 with the pole ear 3, and the pole ear 3 can move relative to the fixing part 131 as the winding core 1 is wound, so that it can enter the channel from the feed end 132 and move out of the channel from the discharge end 133.

[0086] Reference Fig.11 In some embodiments, the distance between the guide surface 134 and the end of the winding core 1 gradually decreases from the feed end 132 to the discharge end 133. Therefore, the guide surface 134 can gradually squeeze the pole ear 3 toward the end of the winding core 1 while the pole ear 3 moves in the channel until the pole ear 3 moves out from the discharge end 133. The pole ear 3 squeezed by the guide surface 134 can be bent toward the end surface of the winding core 1. Therefore, the guide surface 134 can smooth the pole ear 3 toward the end of the winding core 1 during winding, which can avoid the undesirable phenomena such as folding, wrinkling, and disorder of the pole ear 3 during winding, effectively avoid damage to the pole ear 3, and thus help improve the winding quality of the winding core 1. In addition, the pole ear smoothing mechanism can smooth the pole ear 3 of the winding core 1 while the pole piece is being wound. Therefore, when the winding of the winding core 1 is completed, the pole ear 3 at the end of the winding core 1 is also smoothed, thereby eliminating the subsequent smoothing process.

[0087] In addition, in order to improve the production efficiency of the battery cell, the currently commonly used method is to increase the winding speed of the winding machine, that is, to increase the rotation speed of the winding needle 110. However, as the winding speed increases, the pole lug 3 wound on the winding needle 110 is very likely to be turned outward, disordered, or interfere with the pole lug 3 to be wound due to centrifugal force, thereby affecting the quality of the battery cell. The pole lug smoothing mechanism of the embodiment of the present application can smooth the pole lug 3 wound on the winding needle 110, and its smoothing effect can effectively avoid the above-mentioned problems caused by the centrifugal force of the pole lug 3 during the winding process. Therefore, the rotation speed of the winding needle 110 can be further increased to a certain extent, thereby helping to improve the winding efficiency and quality.

[0088] Reference Figure 8 and Fig. 9In the above embodiment, the guide surface 134 of the fixing member 131 can cover a part of the moving path of the pole tab 3, so that the pole tab 3 wound on the winding needle 110 can be gradually smoothed when passing the guide surface 134. It should be noted that the size of the fixing member 131 from the feed end 132 to the discharge end 133 can be reasonably configured based on the rotation speed of the winding needle 110, the degree of downward pressure of the pole tab 3, and the thickness of the winding core 1 to be wound, so as to ensure that the pole tab 3 can be gradually pressed down toward the end of the winding core 1 and smoothed in an appropriate movement distance, and avoid a large degree of compression of the pole tab 3 in an overly short movement distance. If the dimension of the fixing member 131 from the feed end 132 to the discharge end 133 is too short, the portion of the guide surface 134 covering the moving path of the pole lug 3 is too short, and the distance the pole lug 3 passes through the guide surface 134 during winding is too short. As a result, the degree of squeezing of the pole lug 3 per unit distance (i.e., the distance the pole lug 3 is squeezed toward the end of the winding core 1) is too large, and it is difficult to ensure the smoothing effect, and the pole lug 3 is easily damaged. In the tab smoothing mechanism of the present embodiment, the feed end 132 and the discharge end 133 of the fixing member 131 are respectively located on both sides of the winding needle 110, so that the channel between the guide surface 134 and the end of the winding core 1 extends to both sides of the circumference of the winding needle 110, ensuring that the channel has an appropriate length. Therefore, the tab 3 wound on the winding needle 110 enters the channel from the feed end 132 on one side of the winding needle 110, and is gradually squeezed toward the end of the winding core 1 by the guide surface 134 in the channel as the winding needle 110 rotates, and then moves out of the channel from the discharge end 133 on the other side of the winding needle 110, which can ensure the smoothing effect of the tab 3.

[0089] Reference Fig.12 In the above embodiment, the fixing member 131 is in a fan-shaped structure with the axis of the winding needle 110 as the central axis, which can adapt to the movement path of the pole ear 3 wound on the winding needle 110. A slot for inserting the winding needle 110 is provided on the inner side of the fixing member 131 to avoid interference. The outer radius of the fixing member 131 is not less than the maximum radius of the winding core 1 to be wound, so that the pole ear 3 from the inner side to the outer side of the winding core 1 can be smoothed during the entire winding process of the winding core 1.

[0090] Reference Fig. 9 and Fig.12In some embodiments of the tab smoothing mechanism, along the moving path of the tab 3, the thickness of the fixing member 131 gradually increases from the feed end 132 to the discharge end 133, wherein the fixing member 131 can be connected to the mounting portion of the bracket 120 through the side away from the guide surface 134, or connected to the mounting portion through a connecting member, that is, the first guide mechanism 130 can also include a connecting member, the connecting member is connected to the mounting portion and the side of the fixing member 131 away from the tab 3, therefore, the connection position of the connecting member can be reasonably set according to the position of the winding needle 110 and the thickness of the winding core 1 to be wound, so as to ensure that the guiding surface 134 of the fixing member 131 corresponds to the end of the winding core 1. The fixing member 131 can adopt a design similar to that of the Archimedean spiral to facilitate the processing of the fixing member 131. After assembly, due to the change in thickness, the side of the fixing member 131 facing the core 1 gradually approaches the end of the core 1 from the feed end 132 to the discharge end 133, that is, the distance between the surface of the fixing member 131 facing the core 1 and the end of the core 1 decreases from the feed end 132 along the movement path of the pole lug 3 to the discharge end 133, thereby forming the above-mentioned guide surface 134, and a channel with a size gradually decreasing along the extending direction of the pole lug 3 is formed between the guide surface 134 and the end of the core 1, so that the end surface of the pole lug 3 facing the core 1 can be gradually pressed down to achieve the smoothing of the pole lug 3.

[0091] Reference Figure 8 and Fig. 9In some embodiments, the tab smoothing mechanism further includes a second guide mechanism 140, which includes a movable member 141 and a drive assembly 146. The movable member 141 is arranged on one side of the winding needle 110 corresponding to the end of the winding core 1. The movable member 141 includes a connecting portion 142 and a guiding portion 143. The connecting portion 142 is connected to the mounting portion. The guiding portion 143 is located on one side of the feeding end 132. The guiding portion 143 can be connected between the winding core 1 wound on the winding needle 110 and the winding core 1 to be wound on the winding needle 110. The joint 150 of the rolled-in pole piece strip 2 is shielded between the pole lug 3 rolled on the winding needle 110 and the pole lug 3 on the pole piece strip 2 to be rolled, which can effectively avoid the mutual interference between the pole lug 3 of the winding core 1 rolled on the winding needle 110 and the pole lug 3 to be rolled. The driving component 146 is used to drive the movable part 141 to move relative to the fixed part 131, so that the guide part 143 remains located at the joint 150 of the winding core 1 rolled on the winding needle 110 and the pole piece strip 2 to be rolled. As the thickness of the winding core 1 gradually becomes thicker, the driving component 146 drives the movable part 141 to move relative to the fixed part 131 so that the guide part 143 remains shielded between the pole lug 3 rolled on the winding core 1 and the pole lug 3 to be rolled. As the winding core 1 is wound layer by layer, the shielding of the guide part 143 can ensure that the pole lug 3 on the winding core 1 and the pole lug 3 to be rolled do not interfere with each other during winding. During winding, each layer of the pole lugs 3 on the core 1 enters the channel between the guide surface 134 and the end of the core 1 from the feed end 132 of the fixing member 131. When the core 1 is wound until the pole lugs 3 are moved out from the discharge end 133 of the fixing member 131, the pole lugs 3 of the same layer on the core 1 are squeezed toward the end of the core 1 by the guide surface 134, so that each pole lug 3 and the end of the core 1 are at the same set angle, that is, the pole lugs 3 are bent at the same angle toward the winding needle 110, so that the pole lugs 3 of different layers do not interfere with each other, thereby avoiding collision between the pole lugs 3 of different layers, resulting in defects such as disorder and folding of the pole lugs 3, thereby ensuring orderly stratification of the pole lugs 3.

[0092] Reference Fig. 9 and Fig.13 In some embodiments, the guide portion 143 of the movable member 141 has a guide edge 144, which is parallel to the pole sheet strip 2 to be wound, and one end of the guide edge 144 is located at the joint 150. The guide edge 144 is used to support the pole ear 3 on the side of the pole ear 3 of the pole sheet strip 2 facing the winding needle 110. The guide edge 144 parallel to the pole sheet strip 2 can simultaneously support multiple pole ears 3 on the pole sheet strip 2, thereby separating the pole ears 3 on the pole sheet strip 2 from the pole ears 3 that have been wound on the winding needle 110, avoiding mutual collision and damage of the two parts of the pole ears 3 during the winding process.

[0093] Reference Fig. 9 and Fig.13In some embodiments, the guide portion 143 has a shielding surface 145 on one side of the end portion of the winding core 1, and the shielding surface 145 is located between the pole lug 3 of the winding core 1 and the pole lug 3 of the pole sheet strip 2 to be wound, and can shield the pole lug 3 on the winding core 1 to avoid interference. The shielding surface 145 can be an inclined surface or an arc surface, and gradually moves away from the end portion of the winding core 1 toward the direction of the outer pole lug 3, which can effectively avoid the pole lug 3 on the winding core 1 and avoid collision.

[0094] Reference Fig.14 During the winding process of the winding needle 110, there is a joint 150 between the outer layer of the winding core 1 wound on the winding needle 110 and the pole piece strip 2 to be wound, that is, the position where the pole piece strip 2 is wound into the winding core 1. As the winding continues, the thickness of the winding core 1 gradually increases, and the position of the joint 150 also changes continuously. Under the premise that the conveying path of the pole piece strip 2 remains unchanged, the joint 150 where the pole piece strip 2 is wound into the winding core 1 changes from the inner layer of the winding core 1 to the outer side along a set curved path. For the convenience of explanation, Figure 5 The diagram shows the joint 150 where the pole piece strip 2 is wound into the winding core 1 when the thickness of the winding core 1 is different, and a position variation curve 151 of the joint 150 is obtained by connecting each joint 150 with a curve.

[0095] Reference Figure 8 , Fig. 9 and Fig.14 In the pole ear smoothing mechanism of the embodiment of the present application, the driving component 146 may include a driving element and a connecting plate 147, the connecting plate 147 is connected to the mounting portion, the connecting plate 147 is provided with a guide groove 148, the connecting portion 142 of the movable member 141 is connected with a guide column 149, the guide column 149 is penetrated in the guide groove 148 and can move along the guide groove 148, the driving element is used to drive the connecting portion 142 to move, the guide groove 148 is used to limit the moving path of the guide column 149, and as driven by the driving element, the guide column 149 moves along the guide groove 148, which can drive the movable member 141 to move relative to the winding needle 110 according to the set path, and the guide portion 143 is maintained at the junction 150 between the winding core 1 and the pole sheet strip 2 to be wound, shielding between the pole ear 3 of the winding core 1 and the pole ear 3 on the pole sheet strip 2. Among them, the guide groove 148 has a first end and a second end, and the distance between the first end and the winding needle 110 is smaller than the distance between the second end and the winding needle 110. Therefore, the movement of the guide column 149 along the guide groove 148 can change the distance between the guide part 143 and the winding needle 110, that is, change the distance between the guide part 143 and the winding core 1 wound on the winding needle 110, so as to move the guide part 143 to the above-mentioned joint 150 accordingly as the winding core 1 becomes thicker.

[0096] Reference Figure 8 and Fig. 9In some embodiments, the guide groove 148 on the connecting plate 147 may be arc-shaped, and the concave arc side of the guide groove 148 faces away from the winding needle 110, so that when the guide column 149 moves along the guide groove 148, the guide portion 143 can be moved accordingly along the arc path, so that it can move accordingly with the position change of the above-mentioned joint 150. The curvature of the guide groove 148 can be set to be consistent with the curvature of the curve connected to the above-mentioned joint 150. At this time, it is only necessary to drive the movable member 141 to move along the guide groove 148 to ensure that one end of the guide portion 143 moves with the position change of the joint point. In addition, since the speed of winding the pole piece strip 2 is constant, the rate of change of the inclination angle of the pole piece strip 2 is also constant, and the guide edge 144 of the guide portion 143 can remain parallel to the pole piece strip 2 to be wound and can support the pole ear 3 of the pole piece strip 2.

[0097] A conventional linear motion mechanism can be used to drive the movable part 141 to move relative to the connecting plate 147 along the guide groove 148. For example, the conventional linear Indian mechanism includes a synchronous belt mechanism, a gear rack mechanism, a screw module mechanism or a cylinder mechanism. The driving assembly 146 of this embodiment includes a driving element, a gear 1461 and a rack 1462. The rack 1462 is fixedly connected to the movable part 141, and the gear 1461 is connected to the driving element. The gear 1461 is meshed with the rack 1462 to form a gear rack mechanism. The driving element is used to drive the gear 1461 to rotate, so that the rack 1462 drives the movable part 141 to move. The mechanism is simple, reliable and easy to implement.

[0098] The winding core 1 is usually formed by winding the positive electrode sheet and the negative electrode sheet, and a separator is provided between each layer of the electrode sheet. The electrode sheet strip 2 of the above embodiment may include a positive electrode sheet strip 2 and a negative electrode sheet strip 2. Figure 1In some embodiments of the present invention, the conveying device 200 includes a positive electrode sheet conveying mechanism 210, a negative electrode sheet conveying mechanism 220, a first diaphragm conveying mechanism 230 and a second diaphragm conveying mechanism 240 connected to the frame. The positive electrode sheet conveying mechanism 210 is used to convey the positive electrode sheet material strip 2 to the winding needle 110, and the negative electrode sheet conveying mechanism 220 is used to convey the negative electrode sheet material strip 2 to the winding needle 110. The positive electrode tabs 3 on the positive electrode sheet material strip 2 and the negative electrode tabs 3 on the negative electrode sheet material strip 2 are respectively oriented in opposite directions along the axial direction of the winding needle 110, and the positive electrode tabs 3 and the negative electrode tabs 3 wound on the winding needle 110 are respectively oriented toward the two ends of the winding core 1. The first diaphragm conveying mechanism 230 is used to convey the diaphragm material strip 4 to the winding needle 110 between the positive electrode sheet material strip 2 and the negative electrode sheet material strip 2, and the second diaphragm conveying mechanism 240 is used to convey the diaphragm material strip 4 to the winding needle 110 between the electrode sheet material strip 2 and the winding needle 110. The positive electrode sheet conveying mechanism 210, the negative electrode sheet conveying mechanism 220, the first separator conveying mechanism 230 and the second separator conveying mechanism 240 can adopt conventional unwinding mechanisms, and the positive electrode sheet material strip 2, the negative electrode sheet material strip 2 and the separator material strip 4 are arranged in the unwinding mechanism as rolled materials, and unwinding can be performed by pulling out one end of the roll, and unwinding can be performed continuously by conveying toward the conveyor roller, or by winding and pulling the winding needle 110. The conveying device 200 can be provided with a roller on the conveying path between each conveying mechanism and the winding needle 110, so as to orderly distribute and convey each material strip.

[0099] Based on the above embodiment, the winding needle 110 is used to wind the positive electrode sheet material strip 2, the negative electrode sheet material strip 2 and the separator material strip 4 to form a winding core 1. The positive electrode sheet material strip 2 and the negative electrode sheet material strip 2 have an inner side and an outer side respectively. When winding, the inner side of the positive electrode sheet material strip 2 and the negative electrode sheet material strip 2 faces the winding needle 110. A tab bending device 300 is provided on the conveying path of the positive electrode sheet material strip 2, which is used to bend the positive electrode tab 3 toward the inner side of the positive electrode sheet material strip 2. A tab bending device 300 is also provided on the conveying path of the negative electrode sheet material strip 2, which is used to bend the negative electrode tab 3 toward the inner side of the negative electrode sheet material strip 2. The positions of the positive electrode sheet material strip 2 and the negative electrode sheet material strip 2 of the above embodiment can be swapped. The winding device 100 is provided with tab smoothing mechanisms corresponding to the two ends of the winding core 1, which are used to smooth the positive tab 3 and the negative tab 3 at both ends of the winding core 1 toward the end of the winding core 1. As a result, the positive electrode tab 3 and the negative electrode tab 3 can be bent and smoothed online to avoid damage.

[0100] As can be seen from the above, in the battery cell processing system of the embodiment of the present application, the pole piece strip 2 is conveyed by the conveying device 200, and the pole lug 3 of the pole piece strip 2 is bent inwardly by the pole lug bending device 300 on the conveying path of the pole piece strip 2, so that when the pole piece strip 2 is wound by the winding needle 110 at the winding device 100, the pole lug smoothing mechanism can smooth the pole lug 3 of the winding core 1 wound on the winding needle 110 to avoid damage to the pole lug 3, and in some embodiments, the pole lug 3 of the pole piece strip 2 to be wound can also be separated from the pole lug 3 of the winding core 1 to avoid interference, thereby facilitating the orderly stratification of the pole lug 3 on the winding core 1. In this way, the online bending and smoothing of the pole lug 3 is achieved when the pole piece is wound, which can effectively avoid damage to the pole lug 3 during the winding process, thereby helping to improve the processing efficiency and quality of the battery cell. In some embodiments, the tab 3 smoothing device can also separate the tabs 3 of the pole sheet strip 2 to be wound from the tabs 3 of the winding core 1 to avoid interference, thereby facilitating orderly layering of the tabs 3 on the winding core 1. After winding is completed, the subsequent smoothing process after unloading the winding core 1 can be omitted.

[0101] The battery cell processing system may also be provided with a controller and a sensor (not shown in the figure). The controller is communicatively connected with the winding needle 110 drive assembly 146 and the sensor. The sensor is used to detect the thickness of the winding core 1 on the winding needle 110, and generates a sensing signal when the winding core 1 reaches the set thickness. The controller receives the sensing signal and instructs the winding needle 110 to stop winding. At this time, the pole piece strip 2 can be cut so that the winding core 1 can be discharged to the next processing step.

[0102] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery core processing system, characterized in that: It comprises a frame, and a winding device, a conveying device and a tab bending device connected to the frame, wherein: The winding device comprises a winding mechanism and a pole ear smoothing mechanism, wherein the winding mechanism comprises a winding needle and a winding needle driving assembly for driving the winding needle to rotate, the winding needle is used to wind the pole piece strip and the diaphragm strip to form a winding core, the pole piece strip has an inner side and an outer side, and when winding, the inner side of the pole piece strip faces the winding needle, the pole ear smoothing mechanism comprises a bracket and a first guide mechanism, the bracket is connected to the frame, the bracket is provided with a mounting portion, the first guide mechanism comprises a fixing member, the fixing member is located at the pole ear protruding end of the winding core and is connected to the mounting portion, along the circumference of the winding needle, the fixing member comprises a feeding end and a discharging end, the pole ear of the winding core can enter between the fixing member and the end of the winding core from the feeding end as the winding needle rotates, and move out from the discharging end, and the fixing member is used to smooth the pole ear of the winding core toward the end of the winding core; A conveying device, used for conveying the pole piece material strip and the diaphragm material strip to the winding needle respectively; A pole lug bending device is arranged on the conveying path of the pole sheet material strip, and the pole lug bending device includes a roller mechanism and a roller clamping mechanism. The roller mechanism is used to support the outer side of the pole sheet material strip and convey the pole sheet material strip. A die is provided on the roller mechanism at a position corresponding to the pole lug of the pole sheet material strip, and the opening of the die faces the inner side of the pole sheet material strip. The roller clamping mechanism corresponds to the position of the die, and is used to roll and bend the pole lug located on the die before the pole sheet material strip is rolled, so that the pole lug of the pole sheet material strip is bent toward the inner side.

2. The battery core processing system according to claim 1, characterized in that: The fixing member has a guide surface on one side of the end of the winding core, and the distance between the guide surface and the end of the winding core gradually decreases from the feeding end to the discharging end, and the guide surface is used to smooth the pole ear of the winding core toward the end of the winding core.

3. The battery core processing system according to claim 2, characterized in that: The pole lug smoothing mechanism also includes a second guiding mechanism, which includes a movable part and a driving assembly, wherein the movable part is arranged on one side of the winding needle corresponding to the end of the winding core with the pole lug, and the movable part includes a connecting part and a guiding part, wherein the connecting part is connected to the mounting part, and the guiding part is located on one side of the feeding end, and can be shielded between the pole lug of the winding core and the pole lug of the pole sheet strip at the junction of the winding core and the pole sheet strip to be wound, and the driving assembly is used to drive the movable part to move relative to the fixed part until the guide part is located at the junction.

4. The battery core processing system according to claim 3, characterized in that: The driving assembly includes a driving element and a connecting plate, wherein the connecting plate is connected to the mounting portion, the connecting plate is provided with a guide groove, the connecting portion is connected with a guide column, the guide column is passed through the guide groove and can move along the guide groove, the driving element is used to drive the connecting portion to move, and the guide groove is used to limit the moving path of the guide column.

5. The battery core processing system according to claim 1, characterized in that: The pole ear bending device also includes a mounting base and a pressure roller clamping mechanism, wherein the pressure roller clamping mechanism and the over-rolling mechanism are both arranged on the mounting base, the pressure roller clamping mechanism is used to press the pole piece strip onto the over-rolling mechanism, and the roller clamping mechanism is arranged on the pressure roller clamping mechanism, and the over-rolling mechanism, the roller clamping mechanism and the pole piece strip can move at equal linear speeds.

6. The battery core processing system according to claim 5, characterized in that: The pressing roller pressing mechanism comprises: A first driving member, wherein an upper end of the first driving member is connected to the mounting base, and the first driving member has a first output end; A support, wherein the support is arranged at the first output end, the roller mechanism is located below the support, and the first driving member drives the support to move in a vertical direction; and A first roller is rotatably disposed at the lower end of the support.

7. The battery core processing system according to claim 6, characterized in that: The roller pressing mechanism comprises: A second driving member, the second driving member is disposed on the support, and the second driving member has a second output end; A first connecting member, the first connecting member having a first connecting end and a second connecting end, the first connecting end being rotatably connected to the support, the first roller being disposed on the first connecting end, and the second connecting end being rotatably connected to the second output end; and The second roller is arranged on the second connecting end, a convex die is arranged on the second roller, the second driving member drives the second roller to press the pole ear in the vertical direction, and the second roller can roll and bend the pole ear between the convex die and the concave die.

8. The battery core processing system according to claim 6, characterized in that: The roller pressing mechanism comprises: A second driving member, the second driving member is disposed on the support, and the second driving member has a second output end; A motor, wherein the motor is arranged on the support and has a third output terminal; A first connecting member, one end of which is fixedly connected to the third output end, and the other end of which is rotatably connected to the second output end; and The second roller is arranged on the first connecting member, a convex mold is arranged on the second roller, the motor drives the second roller to rotate through the first connecting member, the second driving member drives the second roller to press the pole ear in the vertical direction, and the second roller can roll and bend the pole ear between the convex mold and the concave mold.

9. The battery core processing system according to claim 6, characterized in that: The roller pressing mechanism comprises: A second driving member, the second driving member is disposed on the support, and the second driving member has a second output end; A first connecting member, wherein the first connecting member is rotatably disposed on the support; A transmission member, wherein one end of the first connection member is rotatably connected to the second output end, the other end of the first connection member is connected to the transmission member, and the first connection member is connected to the roller mechanism through the transmission member; and The second roller is arranged on the first connecting member, a punch is arranged on the second roller, the second roller rotates synchronously with the roller mechanism through the transmission member, the second driving member drives the second roller to press the pole ear in the vertical direction, and the second roller can roll and bend the pole ear between the punch and the die.

10. The battery core processing system according to claim 1, characterized in that: The pole tab bending device is provided with tensioning rollers on one side or both sides of the conveying path of the pole sheet material strip along the pole tab bending device, for tensioning the pole sheet material strip passing through the pole tab bending device.

11. The battery core processing system according to any one of claims 1 to 10, characterized in that: The conveying device includes: A positive electrode sheet conveying mechanism, used for conveying the positive electrode sheet strip to the winding needle; A negative electrode sheet conveying mechanism is used to convey the negative electrode sheet material strip to the winding needle, the positive electrode lugs on the positive electrode sheet material strip and the negative electrode lugs on the negative electrode sheet material strip are respectively oriented in opposite directions along the axial direction of the winding needle, and the positive electrode lugs and negative electrode lugs wound on the winding needle are respectively oriented toward the two ends of the winding core; A first diaphragm conveying mechanism is used to convey the diaphragm material strip to the winding needle between the positive electrode sheet material strip and the negative electrode sheet material strip; and The second diaphragm conveying mechanism is used to convey the diaphragm material strip to the winding needle between the pole piece material strip and the winding needle.

12. The battery core processing system according to claim 11, characterized in that: The winding needle is used to wind the positive electrode sheet material strip, the negative electrode sheet material strip and the separator sheet material strip to form a winding core, the positive electrode sheet material strip and the negative electrode sheet material strip respectively have an inner side and an outer side, and when winding, the inner sides of the positive electrode sheet material strip and the negative electrode sheet material strip face the winding needle; The winding device is provided with the tab smoothing mechanism at both ends of the winding core, respectively, for smoothing the positive tabs and negative tabs at both ends of the winding core toward the end of the winding core; The tab bending device is provided on the conveying path of the positive electrode sheet material strip, and is used to fold the positive electrode tab toward the inner side of the positive electrode sheet material strip; The tab bending device is also provided on the conveying path of the negative electrode sheet material strip, and is used to bend the negative electrode tab toward the inner side of the negative electrode sheet material strip.

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