Pole piece feeding and correcting device, pole piece correcting method and winding machine

Abstract

The invention discloses a pole piece feeding and correcting device, a pole piece correcting method and a winding machine. The pole piece feeding and correcting device comprises a first frame body, a moving mechanism, a first correcting mechanism and a second correcting mechanism, wherein the moving mechanism is arranged on the first frame body; the first restoration mechanism and the second restoration mechanism are both connected with the moving mechanism, and the first restoration mechanism and the second restoration mechanism are used for positioning the positive plate and the negative plate. By means of the design, the positions of the first restoration mechanism and the second restoration mechanism relative to the winding device are adjusted through the moving mechanism, and it is ensured that the pole piece firstly enters the first restoration mechanism and the second restoration mechanism before entering the winding device; the first restoration mechanism and the second restoration mechanism can drive the suspended end of the pole piece to move and position and adjust the suspended end of the pole piece, so that the suspended end of the pole piece can enter the winding device at a relatively accurate angle, and the alignment degree of the head end and the tail end of the pole piece is greatly improved after the pole piece is wound by the winding device; and the quality of a battery cell formed by winding the pole piece is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell production and processing, and in particular to a pole piece feeding and correction device, a pole piece correction method and a winding machine. Background Art

[0002] During the battery cell processing and production process, when the electrode is cut, a small section will be left hanging and cannot be accurately fixed in position. If it is sent for winding, it will cause deviations in the alignment of the head and tail, reducing product quality. Summary of the invention

[0003] In order to solve the problem in the prior art that after the pole piece is cut, a small section will be left hanging, and the position cannot be accurately fixed.

[0004] This will cause deviation in the head-tail alignment and reduce product quality. The present invention provides a pole piece feeding correction device and a winding machine.

[0005] The present application provides a pole piece feeding and correcting device, which is used to correct the suspended end of the pole piece, including a first frame, a moving mechanism, a first correcting mechanism and a second correcting mechanism. The moving mechanism is arranged on the first frame, and the first correcting mechanism and the second correcting mechanism are both connected to the moving mechanism. The first correcting mechanism is used to position the positive pole piece or the negative pole piece to adjust the position of the suspended end of the positive pole piece or the negative pole piece, and the second correcting mechanism is used to position the positive pole piece or the negative pole piece to adjust the position of the suspended end of the positive pole piece or the negative pole piece.

[0006] In some embodiments, the first correction mechanism includes a first clamp arm, a second clamp arm and a sliding assembly, the first clamp arm and the second clamp arm are both movably connected to the sliding assembly, the first clamp arm and the second clamp arm are arranged opposite to each other and clamped to form a first correction channel, and the first correction channel is used for the pole piece to pass through;

[0007] The second correcting mechanism comprises a correcting arm and a correcting head, wherein the correcting arm is connected to the moving mechanism, the correcting head is connected to the correcting arm, and the correcting head is provided with a second correcting channel for the pole piece to pass through.

[0008] In some embodiments, the first clamping arm includes a first transverse portion and a first longitudinal portion, the second clamping arm includes a second transverse portion and a second longitudinal portion, the first transverse portion is connected to the first longitudinal portion, the second transverse portion is connected to the second longitudinal portion, the first transverse portion and the second transverse portion are arranged opposite to each other and form the first alignment channel, and an avoidance space is formed between the first longitudinal portion and the second longitudinal portion, and the avoidance space is used to avoid the pole ear of the pole piece.

[0009] In some embodiments, at least one of the first clamping arm and the second clamping arm is provided with a supporting portion, and the supporting portion is disposed adjacent to the second alignment channel and is used to support the pole piece.

[0010] In some embodiments, at least one of the first clamp arm and the second clamp arm is provided with a limit rod, the limit rod is arranged opposite to the supporting portion, and the limit rod and the supporting portion are respectively used to be arranged on the front and back sides of the pole piece to prevent the pole piece from escaping from the return channel.

[0011] In some embodiments, the sliding assembly includes a driving member, a first sliding mechanism and a second sliding mechanism, the driving member is used to drive the first sliding mechanism and the second sliding mechanism to slide, the first sliding mechanism and the second sliding mechanism are both slidably connected to the driving member, the first sliding mechanism is connected to the first clamping arm, and the second sliding mechanism is connected to the second clamping arm.

[0012] In some embodiments, the sliding assembly further includes a second frame and a slide rail, and the slide rail and the driving member are both disposed on the second frame;

[0013] The first sliding mechanism includes a first slider and a second slider, the second sliding mechanism includes a third slider and a fourth slider, the first slider is connected to the second slider, the third slider is connected to the fourth slider, the first slider and the third slider are both slidably disposed on the driving member, and the second slider and the fourth slider are both slidably disposed on the slide rail;

[0014] The driving member drives the first slider to slide so as to drive the third slider to slide, and the driving member drives the second slider to slide so as to drive the fourth slider to slide.

[0015] In some embodiments, the electrode feeding and correcting device further comprises a visual detection mechanism, and the visual detection mechanism is electrically connected to the first correcting mechanism and the second correcting mechanism;

[0016] Wherein, the visual detection mechanism is used to identify the alignment of the suspended ends of the pole pieces.

[0017] A winding machine provided in the present application includes a feeding device, a winding device and the above-mentioned pole piece feeding and correcting device, the feeding device is used to roll the pole piece, the winding device is used to wind the pole piece, the winding device is arranged adjacent to the feeding device, the pole piece feeding and correcting device is arranged adjacent to the winding device and the feeding device, and the pole piece feeding and correcting device is used to correct and adjust the suspended end of the pole piece entering the winding device.

[0018] The present application provides a pole piece correction method, wherein the pole piece correction method adopts the above-mentioned winding machine, and the pole piece correction method comprises:

[0019] Before the feeding device rolls the pole piece into the winding device, the pole piece feeding and correcting device moves to the suspended end of the pole piece, corrects and adjusts the suspended end of the pole piece, and then feeds the suspended end of the pole piece into the winding device to wind the pole piece. At the same time, when the pole piece is wound, the pole piece feeding and correcting device is separated from the pole piece.

[0020] Compared with the prior art, the electrode feeding and correcting device in an embodiment of the present invention has the following beneficial effects: the electrode feeding and correcting device provided in the present application comprises a first frame, a moving mechanism, a first correcting mechanism and a second correcting mechanism, the moving mechanism being arranged on the first frame for adjusting the position of the correcting mechanism; the first correcting mechanism and the second correcting mechanism are both connected to the moving mechanism, the first correcting mechanism being used to position the positive electrode sheet or the negative electrode sheet to adjust the position of the suspended end of the positive electrode sheet or the negative electrode sheet, and the second correcting mechanism being used to position the positive electrode sheet or the negative electrode sheet to adjust the position of the suspended end of the positive electrode sheet or the negative electrode sheet. Through the above design, the positions of the first and second correcting mechanisms relative to the winding device are first adjusted by the moving mechanism to ensure that the pole piece enters the first and second correcting mechanisms before entering the winding device. The first and second correcting mechanisms can drive the suspended end of the pole piece to move and make positioning adjustments to the suspended end of the pole piece to ensure that the suspended end of the pole piece can enter the winding device at a relatively accurate angle, so that the alignment of the head end and the tail end of the pole piece after being wound by the winding device is greatly improved, thereby improving the quality of the battery cell formed by winding the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the assembly structure of an embodiment of the electrode feeding and correcting device provided by the present application;

[0022] Figure 2 yes Figure 1 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 3 It is a partial structural schematic diagram of an embodiment of a pole piece feeding and correcting device provided by the present application;

[0024] Figure 4 It is a schematic diagram of the overall structure of an embodiment of the first correction mechanism provided by the present application;

[0025] Figure 5 yes Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 6 It is a partial structural disassembly schematic diagram of an embodiment of the first correction mechanism provided by the present application;

[0027] Figure 7 It is a partial structural plan view of an embodiment of a pole piece feeding and correcting device provided by the present application;

[0028] Figure 8 It is a schematic diagram of the overall structure of an embodiment of the first correction mechanism provided by the present application;

[0029] Fig. 9 It is a partial structural plan view of an embodiment of the first correction mechanism provided in the present application.

[0030] 100, first alignment mechanism; 11, first clamping arm; 111, first transverse portion; 112, first longitudinal portion; 12, second clamping arm; 121, second transverse portion; 122, second longitudinal portion; 01, first alignment channel; 02, avoidance space; 03, inclined plane; 13, supporting portion; 14, limiting rod; 15, sliding assembly; 151, driving member; 152, first sliding mechanism; 1521, first slider; 1522, second slider; 04, first connecting member; 153, second sliding mechanism; 1531, third slider; 1532, fourth slider; 05, second connecting member; 154, second frame; 155, slide rail; 200, second alignment mechanism; 21, alignment arm; 22, alignment head; 06, second alignment channel; 300, moving mechanism. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, or are the orientation or positional relationship in which the invented product is usually placed when in use. They 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] like Figure 1 , Figure 2 , Figure 3 A pole piece feeding and correcting device is shown, which is used to correct the suspended end of the pole piece, and the pole piece includes a positive pole piece and a negative pole piece.

[0038] The electrode feeding and correcting device includes a first frame, a moving mechanism 300, a first correcting mechanism 100 and a second correcting mechanism 200. The moving mechanism 300 is arranged on the first frame for adjusting the position of the correcting mechanism; the first correcting mechanism 100 and the second correcting mechanism 200 are both connected to the moving mechanism 300. The first correcting mechanism 100 is used to position the positive electrode sheet or the negative electrode sheet to adjust the position of the suspended end of the positive electrode sheet or the negative electrode sheet, and the second correcting mechanism 200 is used to position the positive electrode sheet or the negative electrode sheet to adjust the position of the suspended end of the positive electrode sheet or the negative electrode sheet. Through the above design, the positions of the first straightening mechanism 100 and the second straightening mechanism 200 relative to the winding device are first adjusted by the moving mechanism 300 to ensure that the pole piece enters the first straightening mechanism 100 and the second straightening mechanism 200 before entering the winding device. The first straightening mechanism 100 and the second straightening mechanism 200 can drive the suspended end of the pole piece to move and make positioning adjustments to the suspended end of the pole piece to ensure that the suspended end of the pole piece can enter the winding device at a relatively accurate angle, so that the alignment of the head end and the tail end of the pole piece after being wound by the winding device is greatly improved, thereby improving the quality of the battery cell formed by winding the pole piece.

[0039] The following will introduce the technical details of each component one by one.

[0040] In some embodiments, Figure 1 , Figure 2 , Figure 4 , Figure 5As shown, the above-mentioned first correcting mechanism 100 includes a first clamping arm 11, a second clamping arm 12 and a sliding assembly 15. The first clamping arm 11 and the second clamping arm 12 are both movably connected to the sliding assembly 15. The first clamping arm 11 and the second clamping arm 12 are relatively arranged and clamped to form a first correcting channel 01. The first correcting channel 01 is used for the positive electrode sheet or the negative electrode sheet to pass through. Before the positive or negative electrode sheet is wound, the first clamp arm 11 and the second clamp arm 12 will be clamped together so that the suspended end of the positive or negative electrode sheet is confined within the first return channel 01 formed by the first clamp arm 11 and the second clamp arm 12. At this time, the first clamp arm 11 and the second clamp arm 12 will press against the two sides of the suspended end of the positive or negative electrode sheet to confine the suspended end of the positive or negative electrode sheet within the optimal angle range, so that the suspended end of the positive or negative electrode sheet can enter the winding device at the optimal angle; when the suspended end of the positive or negative electrode sheet enters the winding device, the first clamp arm 11 and the second clamp arm 12 move away from each other to detach from the positive or negative electrode sheet to prevent the first clamp arm 11 and the second clamp arm 12 from blocking or scratching the rest of the positive or negative electrode sheet during the winding process. Since the suspended end of the positive or negative electrode sheet can enter the winding device at the optimal angle, the alignment of the leading end and the tail end of the positive or negative electrode sheet can be greatly improved after being wound by the winding device. For the production of battery cells, the higher the alignment of the leading end and the tail end of the positive or negative electrode sheet after being wound, the better the quality of the battery cell.

[0041] The above-mentioned second straightening mechanism 200 includes a straightening arm 21 and a straightening head 22. The straightening arm 21 is connected to the moving mechanism 300, and the straightening head 22 is connected to the straightening arm 21. The moving mechanism 300 can drive the straightening arm 21 to move, and then move the straightening head 22 to a predetermined position; the straightening head 22 is provided with a second straightening channel 06, and the second straightening channel 06 is used for the positive electrode sheet or the negative electrode sheet to pass through. After the positive electrode sheet or the negative electrode sheet passes through the second straightening channel 06, the second straightening channel 06 will restrict the two sides, front and back sides of the suspended end of the positive electrode sheet or the negative electrode sheet, so that the suspended end of the positive electrode sheet or the negative electrode sheet can enter the winding device at an optimal angle, so that the alignment of the head end and the tail end of the positive electrode sheet or the negative electrode sheet after being wound by the winding device can be greatly improved. For the production of battery cells, the higher the alignment of the head end and the tail end of the positive electrode sheet or the negative electrode sheet after the positive electrode sheet or the negative electrode sheet is wound, the better the quality of the battery cell.

[0042] In summary, the production quality of the battery cell can be improved by adjusting the first correcting mechanism 100 and the second correcting mechanism 200 to the suspended end of the electrode piece.

[0043] In addition to the above effects, the design of the relative movement of the first clamp arm 11 and the second clamp arm 12 can facilitate the adjustment of the spacing between the first clamp arm 11 and the second clamp arm 12 according to the width of the wound pole piece, thereby forming alignment channels of different widths. In this way, the alignment mechanism can be used to adjust the suspended ends of pole pieces of various widths, thereby improving the production quality of various types of battery cells.

[0044] In some embodiments, Figure 4 , Figure 5 As shown, the first clamp arm 11 includes a first transverse portion 111 and a first longitudinal portion 112, and the second clamp arm 12 includes a second transverse portion 121 and a second longitudinal portion 122. The first transverse portion 111 is connected to the first longitudinal portion 112, and the second transverse portion 121 is connected to the second longitudinal portion 122. The first transverse portion 111 and the second transverse portion 121 are arranged opposite to each other and form a return channel. An escape space 02 is formed between the first longitudinal portion 112 and the second longitudinal portion 122. The escape space 02 is used to escape the pole ear of the pole piece. There is a pole ear at the end of the pole piece, and the pole ear protrudes from both sides of the pole piece. The ear pole piece is wound at a high speed. If the pole ear collides or scratches with the first clamp arm 11 and the second clamp arm 12 during winding, the pole ear is easily damaged. Through the above design, the escape space 02 can be formed at the position where the first clamp arm 11 and the second clamp arm 12 are easy to contact with the pole ear, so that the pole ear will not be bumped during the winding process, which plays a protective role on the pole ear.

[0045] In other embodiments, the first transverse portion 111 and / or the second transverse portion 121 is provided with an inclined surface 03 tangent to the winding direction of the tab.

[0046] like Figure 4 , Figure 5 As shown, the inclined surface 03 is provided on the first transverse portion 111 , and the pole ear of the pole piece will slide along the inclined surface 03 when winding to avoid collision with the first transverse portion 111 , thereby protecting the pole ear.

[0047] In other embodiments, the first transverse portion 111 and the first longitudinal portion 112 are rotatably connected, and / or the second transverse portion 121 and the second longitudinal portion 122 are rotatably connected; the first transverse portion 111 and / or the second transverse portion 121 can be rotated relative to the first longitudinal portion 112 and / or the second longitudinal portion 122 to adjust the inclination angle of the inclined surface 03.

[0048] See also Figure 4 , Figure 5It is understood that in actual applications, since the winding lengths of the pole pieces required for different battery cells are different, the diameters of the battery cells formed by the pole pieces of different lengths after winding will also be different, which will cause the tangential directions of the pole ears at the tail ends of the pole ears to be different during winding. By rotating the first transverse portion 111 and / or the second transverse portion 121, the inclination angle of the slope 03 can be adjusted to be consistent with the tangential direction of the pole ears, thereby better protecting the pole ears.

[0049] In some embodiments, at least one of the first clamping arm 11 and the second clamping arm 12 is provided with a supporting portion 13 , and the supporting portion 13 is disposed adjacent to the alignment channel and is used to support the pole piece.

[0050] like Figure 4 , Figure 5 As shown, the first clamp arm 11 and the second clamp arm 12 are both provided on the supporting portion 13, and the two supporting portions 13 relatively protrude from the opposite surfaces of the first clamp arm 11 and the second clamp arm 12 to support the pole piece from both sides of the pole piece. Supporting the pole piece from both sides of the pole piece can make the forces on both sides of the pole piece more uniform, and facilitate the alignment of the suspended end of the pole piece. The supporting portion 13 and the opposite surfaces of the first clamp arm 11 and the second clamp arm 12 form a right-angle structure to hold and limit the two sides of the pole piece. The right-angle structure can not only limit the pole piece more effectively but also prevent the pole piece from leaving the alignment channel.

[0051] In some embodiments, at least one of the first clamp arm 11 and the second clamp arm 12 is provided with a limit rod 14, and the limit rod 14 is arranged opposite to the supporting portion 13. The limit rod 14 and the supporting portion 13 are respectively used to be arranged on the front and back sides of the pole piece to prevent the pole piece from escaping from the return channel.

[0052] like Figure 4 , Figure 5 As shown, the second clamp arm 12 is provided with a limiting rod 14, which extends toward one side of the first clamp arm 11 and passes through the first clamp arm 11, and the limiting rod 14 and the supporting portion 13 are respectively arranged on the front and back sides of the pole piece, thereby being able to completely restrict the pole piece inside the alignment channel, effectively ensuring that the pole piece will not escape from the alignment channel during the alignment and adjustment process.

[0053] It can be understood that the above-mentioned limit rod 14 extends a predetermined distance toward one side of the first clamp arm 11, and the predetermined distance is greater than the maximum pole piece width that can be adjusted by the correction mechanism. In this way, after the first clamp arm 11 and the second clamp arm 12 adjust the spacing according to the width of the pole piece, the limit rod 14 can always completely block and restrict the front side of the pole piece, and also make the force on both sides of the pole piece uniform when blocked by the limit rod 14.

[0054] In some embodiments, Figure 6 , Fig. 9As shown, the sliding assembly 15 includes a driving member 151, a first sliding mechanism 152 and a second sliding mechanism 153. The driving member 151 is used to drive the first sliding mechanism 152 and the second sliding mechanism 153 to slide. The first sliding mechanism 152 and the second sliding mechanism 153 are both slidably connected to the driving member 151. The first sliding mechanism 152 is connected to the first clamping arm 11, and the second sliding mechanism 153 is connected to the second clamping arm 12.

[0055] Specifically, Fig. 9 As shown, in actual application, the above-mentioned driving member 151 can be a cylinder with two sliders, and the two sliders can move relative to each other. The first clamping arm 11 and the second clamping arm 12 are driven by the two sliders respectively. In this design, only one cylinder is needed to control the first clamping arm 11 and the second clamping arm 12 at the same time. During debugging, only one cylinder needs to be debugged, which reduces the debugging difficulty compared with multiple driving members 151. At the same time, the cylinder is relatively cheap in production and processing, and the production cost can also be reduced.

[0056] In some embodiments, Figure 4 , Figure 6 , Figure 8 , Fig. 9 As shown, the sliding assembly 15 further includes a second frame 154 and a slide rail 155, and the slide rail 155 and the driving member 151 are both arranged on the second frame 154; the first sliding mechanism 152 includes a first slider 1521 and a second slider 1522, and the second sliding mechanism 153 includes a third slider 1531 and a fourth slider 1532, the first slider 1521 and the second slider 1522 are connected and can slide synchronously, and the third slider 1531 and the fourth slider 1532 are connected and can slide synchronously, the first slider 1521 and the third slider 1531 are both slidably arranged on the driving member 151, and the second slider 1522 and the fourth slider 1532 are both slidably arranged on the slide rail 155; through the above design, when the driving member 151 drives the first slider 1521 to slide, it can drive the third slider 1531 to slide synchronously, and when the driving member 151 drives the second slider 1522 to slide, it can drive the fourth slider 1532 to slide synchronously. In the process of adjusting the suspended end of the pole piece, due to the high precision requirement and the very small adjustment range, the design of synchronous sliding of multiple sets of sliders is less likely to shake than a single slider during the sliding process; the above design is provided with an additional slide rail 155 on the second frame 154, and a second slider 1522 and a fourth slider 1532 are provided on the slide rail 155, and again refer to Figure 4 , Figure 6 , Figure 8 , Fig. 9It can be seen that a first connecting member 04 is provided between the first slider 1521 and the second slider 1522, and the first connecting member 04 is fixedly connected to the first slider 1521 and the second slider 1522 respectively. In this way, the first slider 1521 and the second slider 1522 can slide synchronously under the fixed connection of the first connecting member 04. The sliding structure formed by the first connecting member 04 connecting the first slider 1521 and the second slider 1522 is more stable and less likely to shake than a single slider, which is conducive to improving the accuracy of the return mechanism in returning and adjusting the suspended end of the pole piece; In principle, a second connecting member 05 is arranged between the third slider 1531 and the fourth slider 1532, and the second connecting member 05 is fixedly connected to the third slider 1531 and the fourth slider 1532 respectively. In this way, the third slider 1531 and the fourth slider 1532 can slide synchronously under the fixed connection of the second connecting member 05. The sliding structure formed by the second connecting member 05 connecting the third slider 1531 and the fourth slider 1532 is more stable and less prone to shaking than a single slider, which is beneficial to improving the accuracy of the correction mechanism in correcting the suspended end of the pole piece.

[0057] In some embodiments, the electrode feeding and correcting device further includes a visual detection mechanism, which is electrically connected to the correcting mechanism; wherein the visual detection mechanism is used to identify the alignment of the suspended end of the electrode. The visual detection mechanism continuously photographs and identifies the suspended end of the electrode to identify the state of the suspended end of the electrode, and at the same time feeds back the state of the suspended end of the electrode to the correcting mechanism in the form of an electrical signal so that the correcting mechanism can correct and adjust the suspended end of the electrode. The correcting mechanism limits the suspended end of the electrode within the correcting channel by moving the first clamping arm 11 and the second clamping arm 12, so that the suspended end of the electrode can enter at the best angle when entering the winding device. The visual detection mechanism continuously photographs and identifies the suspended end of the electrode. If the angle of the suspended end of the electrode is not appropriate, it is fed back to the correcting mechanism to adjust the suspended end of the electrode. If the angle of the suspended end of the electrode is appropriate, the next step is performed.

[0058] The present application provides a winding machine, including a feeding device, a winding device and a pole piece feeding and correcting device, wherein the feeding device is used for rolling pole pieces; the winding device is used for winding pole pieces, and the winding device is arranged adjacent to the feeding device; the pole piece feeding and correcting device is arranged adjacent to the winding device and the feeding device, and the pole piece feeding and correcting device is used for correcting and adjusting the suspended end of the pole piece entering the winding device. When the feeding device rolls the pole piece into the winding device, one end of the pole piece will be suspended, and the suspended end cannot be accurately fixed in position. Direct winding easily causes deviation in the alignment of the head and tail ends of the pole piece. By setting the pole piece feeding and correcting device, the suspended end of the pole piece is corrected by the pole piece feeding and correcting device before entering the winding device, and then the suspended end of the pole piece after correction is sent to the winding device for winding by the pole piece feeding and correcting device, thereby improving the alignment of the head and tail ends of the pole piece after winding, thereby improving the quality of the battery cell.

[0059] The present application provides a pole piece correction method, which adopts the winding machine in the above scheme, and the pole piece correction method includes:

[0060] Before the feeding device rolls the pole piece into the winding device, the pole piece feeding and correcting device moves to the suspended end of the pole piece, corrects and adjusts the suspended end of the pole piece, and then feeds the suspended end of the pole piece into the winding device to wind the pole piece. At the same time, when the pole piece is wound, the pole piece feeding and correcting device is separated from the pole piece to avoid obstruction to the winding process of the pole piece. The pole piece feeding and correcting device includes a first frame, a moving mechanism 300 and a correcting mechanism. First, the correcting mechanism is moved to a predetermined position by the moving mechanism 300. At the predetermined position, the correcting mechanism can correct and adjust the suspended end of the pole piece on the feeding device. After the correcting mechanism corrects the suspended end of the pole piece, the suspended end of the pole piece is then fed into the winding port of the winding device by the moving mechanism 300. Since the suspended end of the pole piece has been corrected, there will be no large deviation between the head and tail ends of the pole piece after the pole piece is wound to form a battery cell, thereby improving the production quality of the battery cell.

[0061] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pole piece feeding and correcting device, used for correcting the suspended end of the pole piece, characterized in that: include: The first frame; A moving mechanism (300), wherein the moving mechanism (300) is arranged on the first frame; A first correcting mechanism (100) and a second correcting mechanism (200), wherein the first correcting mechanism (100) and the second correcting mechanism (200) are both connected to the moving mechanism (300), the first correcting mechanism (100) is used to position the positive electrode sheet or the negative electrode sheet to adjust the position of the suspended end of the positive electrode sheet or the negative electrode sheet, and the second correcting mechanism (200) is used to position the positive electrode sheet or the negative electrode sheet to adjust the position of the suspended end of the positive electrode sheet or the negative electrode sheet.

2. The electrode feeding and correcting device according to claim 1, characterized in that: The first correcting mechanism (100) comprises a first clamping arm (11), a second clamping arm (12) and a sliding assembly (15); the first clamping arm (11) and the second clamping arm (12) are both movably connected to the sliding assembly (15); the first clamping arm (11) and the second clamping arm (12) are arranged opposite to each other and clamped to form a first correcting channel (01); the first correcting channel (01) is used for allowing the pole piece to pass through; The second correcting mechanism (200) comprises a correcting arm (21) and a correcting head (22); the correcting arm (21) is connected to the moving mechanism (300); the correcting head (22) is connected to the correcting arm (21); the correcting head (22) is provided with a second correcting channel (06); and the second correcting channel (06) is used for the pole piece to pass through.

3. The electrode feeding and correcting device according to claim 2, characterized in that: The first clamping arm (11) comprises a first transverse portion (111) and a first longitudinal portion (112); the second clamping arm (12) comprises a second transverse portion (121) and a second longitudinal portion (122); the first transverse portion (111) and the first longitudinal portion (112) are connected; the second transverse portion (121) and the second longitudinal portion (122) are connected; the first transverse portion (111) and the second transverse portion (121) are arranged opposite to each other and form the first alignment channel (01); an avoidance space (02) is formed between the first longitudinal portion (112) and the second longitudinal portion (122); the avoidance space (02) is used to avoid the pole ear of the pole piece.

4. The electrode feeding and correcting device according to claim 2, characterized in that: At least one of the first clamping arm (11) and the second clamping arm (12) is provided with a supporting portion (13), and the supporting portion (13) is arranged adjacent to the second alignment channel (06) and is used to support the pole piece.

5. The electrode feeding and correcting device according to claim 4, characterized in that: At least one of the first clamping arm (11) and the second clamping arm (12) is provided with a limiting rod (14), the limiting rod (14) being arranged opposite to the supporting portion (13), the limiting rod (14) and the supporting portion (13) being respectively arranged on the front and back sides of the pole piece to prevent the pole piece from escaping from the return channel.

6. The electrode feeding and correcting device according to claim 2, characterized in that: The sliding assembly (15) comprises a driving member (151), a first sliding mechanism (152) and a second sliding mechanism (153); the driving member (151) is used to drive the first sliding mechanism (152) and the second sliding mechanism (153) to slide; the first sliding mechanism (152) and the second sliding mechanism (153) are both slidably connected to the driving member (151); the first sliding mechanism (152) is connected to the first clamping arm (11); and the second sliding mechanism (153) is connected to the second clamping arm (12).

7. The electrode feeding and correcting device according to claim 6, characterized in that: The sliding assembly (15) further comprises a second frame (154) and a slide rail (155), wherein the slide rail (155) and the driving member (151) are both arranged on the second frame (154); The first sliding mechanism (152) comprises a first sliding block (1521) and a second sliding block (1522); the second sliding mechanism (153) comprises a third sliding block (1531) and a fourth sliding block (1532); the first sliding block (1521) and the second sliding block (1522) are connected; the third sliding block (1531) and the fourth sliding block (1532) are connected; the first sliding block (1521) and the third sliding block (1531) are both slidably disposed on the driving member (151); the second sliding block (1522) and the fourth sliding block (1532) are both slidably disposed on the slide rail (155); The driving member (151) drives the first slider (1521) to slide so as to drive the third slider (1531) to slide, and the driving member (151) drives the second slider (1522) to slide so as to drive the fourth slider (1532) to slide.

8. The electrode feeding and correcting device according to claim 1, characterized in that: The electrode feeding and correcting device further comprises a visual detection mechanism, wherein the visual detection mechanism is electrically connected to the first correcting mechanism (100) and the second correcting mechanism (200); Wherein, the visual detection mechanism is used to identify the alignment of the suspended ends of the pole pieces.

9. A winding machine, characterized in that: include: A feeding device, the feeding device is used to roll the pole pieces; A winding device, the winding device is used to wind the pole piece, and the winding device is arranged adjacent to the feeding device; The pole piece feeding and correcting device described in any one of claims 1 to 8 is arranged adjacent to the winding device and the feeding device, and is used to correct and adjust the suspended end of the pole piece entering the winding device.

10. A pole piece correction method, characterized in that: The pole piece correction method adopts the winding machine described in claim 9, and the pole piece correction method comprises: Before the feeding device rolls the pole piece into the winding device, the pole piece feeding and correcting device moves to the suspended end of the pole piece, corrects and adjusts the suspended end of the pole piece, and then feeds the suspended end of the pole piece into the winding device to wind the pole piece. At the same time, when the pole piece is wound, the pole piece feeding and correcting device is separated from the pole piece.

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