An electrode tab chasing device and winding machine

Abstract

The utility model relates to battery production technical field discloses a kind of pole piece pursuit cutting device and winding machine.The pole piece pursuit cutting device includes guide rail, cutting mechanism, pressing mechanism, first driving mechanism, piece feeding mechanism and second driving mechanism;Cutting mechanism is slidably arranged on guide rail and is used to cut pole piece when accelerating to synchronous transmission with pole piece;Pressing mechanism is slidably arranged on guide rail and is used to press pole piece before cutting mechanism cuts pole piece;First driving mechanism is connected with cutting mechanism and pressing mechanism respectively, and is used to drive cutting mechanism and pressing mechanism along guide rail synchronous reciprocating movement;Piece feeding mechanism is slidably arranged on guide rail and located the upstream of cutting mechanism and pressing mechanism, and piece feeding mechanism is used to send pole piece to cutting mechanism;Second driving mechanism is connected with piece feeding mechanism and is used to drive piece feeding mechanism along guide rail reciprocating movement.The pole piece pursuit cutting device can reduce pole piece cutting mouth burr, powder dropping and other problems, improve cutting tool life and pole piece pursuit cutting speed.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to an electrode cutting device and a winding machine. Background Technology

[0002] In the lithium battery composite process, the electrode sheet and separator need to be fed into a composite device. The composite device applies a certain pressure to bond the electrode sheet and separator together. After composite bonding, they are sent to a winding machine for winding. Because during the cell winding process, the electrode sheet is cut after one cell is wound, and the next section of electrode sheet is fed into the composite station to prepare for the winding of the next cell.

[0003] Traditional winding machines require stopping the winding process when winding battery cells, meaning the electrode sheets are stationary. Then, a fixed-position cutter cuts the electrode sheets, and the winding needle resumes the winding process until the entire battery cell is wound. This cutting method requires the winding needle to stop the winding process midway, which greatly reduces the battery cell production speed, and the tension stability of the electrode sheets cannot be guaranteed.

[0004] To address the aforementioned issues, an existing patent with publication number CN222181271U discloses an electrode cutting device and a winding machine. When the electrode needs to be cut, the feeding assembly and the cutting mechanism accelerate simultaneously. When the feeding assembly, the cutting mechanism, and the electrode are aligned, the feeding assembly clamps the electrode and feeds it to the cutting mechanism. The cutting mechanism cuts the electrode, and then the cutting mechanism decelerates to zero. The feeding assembly then sends the cut electrode out of the cutting mechanism and decelerates to zero, ensuring that the electrode can be smoothly fed in for winding in the next cycle.

[0005] Based on the above tracking and cutting method, the feeding assembly and the cutting mechanism are driven by two different driving mechanisms. Therefore, there will inevitably be a slight speed difference, which will cause a slight relative displacement between the electrode and the cutting mechanism when the cutting mechanism cuts the electrode. This will cause problems such as excessive burrs at the electrode cutting edge, serious powder shedding, and short cutter life, thus limiting the electrode tracking and cutting speed and affecting the overall efficiency of the machine.

[0006] Therefore, there is an urgent need to provide an electrode cutting device and a winding machine to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide an electrode cutting device and a winding machine that can reduce problems such as burrs and powdering at the electrode cutting edge, and improve the life of the cutter and the electrode cutting speed.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] An electrode tracking and cutting device, comprising:

[0010] guide;

[0011] A cutting mechanism is slidably mounted on the guide rail. The cutting mechanism is used to cut the electrode when the electrode is accelerated to be transmitted synchronously with the electrode.

[0012] A pressing mechanism is slidably disposed on the guide rail. The pressing mechanism is used to press the electrode sheet onto the cutting mechanism before the cutting mechanism cuts the electrode sheet.

[0013] The first driving mechanism is connected to the cutting mechanism and the pressing mechanism respectively, and is used to drive the cutting mechanism and the pressing mechanism to reciprocate synchronously along the guide rail;

[0014] A feeding mechanism is slidably disposed on the guide rail and located upstream of the cutting mechanism and the clamping mechanism. The feeding mechanism is used to clamp the electrode sheet to the cutting mechanism.

[0015] The second drive mechanism is connected to the wafer feeding mechanism and is used to drive the wafer feeding mechanism to reciprocate along the guide rail.

[0016] As an optional solution, the cutting mechanism includes a fixed base slidably connected to the guide rail, a cutter support frame connected to the fixed base, a fixed blade holder and a cutting drive assembly connected to the cutter support frame, a fixed blade mounted on the fixed blade holder, a movable blade holder connected to the output end of the cutting drive assembly, a moving blade mounted on the movable blade holder, a cutting gap forming between the moving blade and the fixed blade that allows the electrode to pass through, and the cutting drive assembly driving the moving blade to move closer to the fixed blade to cut the electrode.

[0017] As an optional solution, the clamping mechanism is disposed on the cutting mechanism.

[0018] As an optional solution, the clamping mechanism includes a clamping drive and a pressure plate. The clamping drive is mounted on the movable tool holder, and the output shaft of the clamping drive passes through the movable tool holder and is connected to the pressure plate. The pressure plate and the fixed tool are arranged opposite to each other.

[0019] As an alternative, the pressure plate protrudes from the moving blade in the cutting direction of the moving blade.

[0020] As an optional solution, the cutting drive assembly includes a linear drive component, which is mounted on the cutter support frame and can output movement in a preset direction. The preset direction is perpendicular to the transmission direction of the electrode and the cutting direction of the moving blade. The output end of the linear drive component is connected to a guide pin, which extends along the transmission direction of the electrode. The movable blade holder is connected to a linkage plate via a drive rod on the side opposite to the moving blade. A drive block is connected to the linkage plate, and an arc-shaped drive groove is provided on the drive block to slide with the guide pin.

[0021] As an optional solution, the feeding mechanism includes a feeding base, a first conveying roller, and a second conveying roller. The feeding base is slidably connected to the guide rail, and the first and second conveying rollers are movably connected to the feeding base. An adjustable feeding gap is formed between the first and second conveying rollers, which can pass through the electrode sheet. The first and second conveying rollers are used to unidirectionally feed the electrode sheet to the cutting mechanism.

[0022] As an optional solution, the electrode feeding mechanism further includes a first guide plate and a second guide plate disposed on the electrode feeding base. The first guide plate is located downstream of the first conveying roller, and the second guide plate is located downstream of the second conveying roller. A guide channel for guiding the electrode conveying is formed between the first guide plate and the second guide plate.

[0023] As an optional solution, an electrode guide roller is also included. The electrode guide roller is located upstream of the feeding mechanism. An electrode smoothing plate is provided on the electrode guide roller. The electrode smoothing plate is used to change the direction of the external electrode and transport it to the feeding mechanism.

[0024] A winding machine includes the aforementioned electrode cutting device.

[0025] The beneficial effects of this utility model are:

[0026] This invention provides an electrode tracking and cutting device. When the electrode needs to be cut, a first drive mechanism drives a feeding mechanism to accelerate along a guide rail, and a second drive mechanism drives a cutting mechanism and a clamping mechanism to accelerate synchronously along the guide rail. When the speeds of the feeding mechanism, cutting mechanism, clamping mechanism, and electrode are consistent, the feeding mechanism clamps the electrode and feeds it to the cutting mechanism. The clamping mechanism first clamps the electrode onto the cutting mechanism, ensuring that the electrode and the cutting mechanism maintain the same speed. The cutting mechanism then cuts the electrode. The cutting mechanism moves in the same direction and at the same speed as the electrode, and then cuts the electrode during a relatively stationary, uniform motion, without stopping the machine, thus improving the winding efficiency of the battery cell. Furthermore, the clamping mechanism and the cutting mechanism are driven by the same drive mechanism, ensuring that the speeds of the electrode and the cutting mechanism are equal when the cutting mechanism cuts the electrode, thereby reducing problems such as burrs and powder shedding at the electrode cut edge, improving the cutter life, and increasing the electrode tracking and cutting speed.

[0027] This utility model also provides a winding machine. By adopting the above-mentioned electrode cutting device, it is possible to reduce problems such as burrs and powder falling off the electrode cutting edge, and improve the life of the cutter and the electrode cutting speed. Attached Figure Description

[0028] To more clearly and understandably illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the electrode cutting device provided in this embodiment of the utility model;

[0030] Figure 2 This is a first structural schematic diagram of the cutting mechanism and the clamping mechanism provided in this embodiment of the utility model;

[0031] Figure 3 This is a second structural schematic diagram of the cutting mechanism and the clamping mechanism provided in this embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the feeding mechanism provided in an embodiment of the present invention.

[0033] In the picture:

[0034] 10. Guide rail;

[0035] 20. Cutting mechanism; 21. Fixed base; 22. Cutter support frame; 23. Fixed cutter holder; 24. Cutting drive assembly; 241. Linear drive component; 242. Guide pin; 243. Drive rod; 244. Linkage plate; 245. Drive block; 2451. Arc-shaped drive groove; 25. Fixed blade; 26. Movable cutter holder; 27. Moving blade; 28. Adapter plate;

[0036] 30. Clamping mechanism; 31. Clamping drive component; 32. Pressure plate;

[0037] 40. First drive mechanism;

[0038] 50. Wafer feeding mechanism; 51. Wafer feeding base; 52. Wafer feeding support frame; 53. Wafer feeding drive assembly; 54. Fixed mounting base; 55. First conveyor roller; 56. Movable mounting base; 57. Second conveyor roller; 58. First guide plate; 59. Second guide plate;

[0039] 60. Second drive mechanism;

[0040] 70. Electrode sheet passing roller; 71. Electrode sheet smoothing plate;

[0041] 80. Base plate. Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1 As shown, this embodiment provides an electrode tracking and cutting device, including a guide rail 10, a cutting mechanism 20, a clamping mechanism 30, a first driving mechanism 40, a feeding mechanism 50, and a second driving mechanism 60. The cutting mechanism 20 is slidably disposed on the guide rail 10 and is used to cut the electrode when it is accelerated to be synchronously transmitted with the electrode. The clamping mechanism 30 is slidably disposed on the guide rail 10 and is used to clamp the electrode onto the cutting mechanism 20 before the cutting mechanism 20 cuts the electrode. The first driving mechanism 40 is connected to the cutting mechanism 20 and the clamping mechanism 30 respectively, and is used to drive the cutting mechanism 20 and the clamping mechanism 30 to reciprocate synchronously along the guide rail 10. The feeding mechanism 50 is slidably disposed on the guide rail 10 and is located upstream of the cutting mechanism 20 and the clamping mechanism 30. The feeding mechanism 50 is used to clamp and feed the electrode to the cutting mechanism 20. The second driving mechanism 60 is connected to the feeding mechanism 50 and is used to drive the feeding mechanism 50 to reciprocate along the guide rail 10.

[0047] It should be noted that the terms "upstream" and "downstream" mentioned in the text are based on the direction of electrode transport. Along the direction of electrode transport, the electrode that is relatively in front is considered downstream, and the electrode that is relatively behind is considered upstream. The electrode is transported from the upstream position to the downstream position.

[0048] When the electrode sheet needs to be cut, the first drive mechanism 40 drives the cutting mechanism 20 and the clamping mechanism 30 to accelerate synchronously along the guide rail 10, and the second drive mechanism 60 drives the feeding mechanism 50 to accelerate along the guide rail 10. When the speeds of the feeding mechanism 50, the cutting mechanism 20, the clamping mechanism 30, and the electrode sheet are consistent, the feeding mechanism 50 clamps the electrode sheet and feeds it to the cutting mechanism 20. The clamping mechanism 30 first clamps the electrode sheet onto the cutting mechanism 20, so that the electrode sheet and the cutting mechanism 20 maintain the same speed. Then, the cutting mechanism 20 cuts the electrode sheet. The cutting mechanism 20 moves in the same direction and at the same speed as the electrode sheet, and then cuts the electrode sheet during the relatively stationary uniform motion without stopping the machine, which improves the winding efficiency of the battery cell. Furthermore, the clamping mechanism 30 and the cutting mechanism 20 are driven by the same drive mechanism, which ensures that the speeds of the electrode sheet and the cutting mechanism 20 are equal when the cutting mechanism 20 cuts the electrode sheet, thereby reducing problems such as burrs and powder shedding at the electrode sheet cut edge, improving the cutter life and the electrode sheet chasing speed.

[0049] In this embodiment, the first drive mechanism 40 and the second drive mechanism 60 can respectively adopt common existing technologies such as motor lead screw nut, cylinder or other structures that can realize linear motion, which will not be described in detail here.

[0050] Specifically, in this embodiment, there are two guide rails 10, which are arranged side by side with intervals to ensure the stability of the sliding of the feeding mechanism 50, the cutting mechanism 20 and the pressing mechanism 30.

[0051] In this embodiment, as Figures 1 to 3 As shown, the cutting mechanism 20 includes a fixed base 21, which is slidably connected to the guide rail 10. A cutter support frame 22 is connected to the fixed base 21. Optionally, the cutter support frame 22 can be directly connected to the fixed base 21 or indirectly connected to the fixed base 21 via an adapter plate 28. A fixed blade holder 23 is connected to the cutter support frame 22, and a fixed blade 25 is mounted on the fixed blade holder 23. A cutting drive assembly 24 is connected to the cutter support frame 22 or the adapter plate 28. The output end of the cutting drive assembly 24 is connected to a movable blade holder 26, and a moving blade 27 is mounted on the movable blade holder 26. A cutting gap is formed between the moving blade 27 and the fixed blade 25, allowing the electrode sheet to pass through. The cutting drive assembly 24 drives the moving blade 27 to move closer to the fixed blade 25 to cut the electrode sheet. The fixed blade 25 is in a fixed position. The cutting drive assembly 24 drives the movable blade holder 26 to move. The movable blade holder 26 drives the moving blade 27 to move, causing the moving blade 27 to move closer to or further away from the fixed blade 25. When the moving blade 27 moves closer to the fixed blade 25, the cutting gap decreases, cutting the electrode sheet. When the moving blade 27 moves further away from the fixed blade 25, the cutting gap increases, and the electrode sheet passes through the cutting gap and is conveyed downstream.

[0052] Optionally, such as Figure 2As shown, the clamping mechanism 30 is mounted on the cutting mechanism 20. The cutting mechanism 20 is directly connected to the output end of the first drive mechanism 40. In this way, the first drive mechanism 40 can drive the cutting mechanism 20 to move, which in turn drives the clamping mechanism 30 to move synchronously. This design is more compact and saves space.

[0053] In an optional embodiment, such as Figure 2 and Figure 3 As shown, the clamping mechanism 30 includes a clamping drive 31 and a pressure plate 32. The clamping drive 31 is mounted on the movable blade holder 26. The output shaft of the clamping drive 31 passes through the movable blade holder 26 and is connected to the pressure plate 32. The pressure plate 32 and the fixed blade 25 are arranged opposite to each other. The clamping drive 31 can be a cylinder. The cylinder is kept in the extended state. When cutting the electrode, the cutting drive assembly 24 drives the movable blade holder 26 to move. The movable blade holder 26 drives the moving blade 27 and the clamping mechanism 30 to move towards the fixed blade 25 synchronously. The pressure plate 32 first clamps the electrode onto the fixed blade 25, so that the electrode and the cutting mechanism 20 maintain the same speed. Then the moving blade 27 cuts the electrode. This can reduce problems such as burrs and powdering at the electrode cutting edge, improve the blade life and the electrode cutting speed.

[0054] In an optional embodiment, the pressure plate 32 protrudes beyond the moving blade 27 in the cutting direction of the moving blade 27. That is, in the moving direction of the moving blade 27, the pressure plate 32 is closer to the fixed blade 25 than the moving blade 27, ensuring that before the electrode is cut, the pressure plate 32 first presses the electrode onto the fixed blade 25, and then the moving blade 27 cuts the electrode, so that the electrode and the cutting mechanism 20 maintain the same speed. It should be noted that after the pressure plate 32 presses the electrode onto the fixed blade 25, as the moving blade 27 feeds further, the pressure plate 32 can actually not move further. At this time, the piston rod of the pressing drive member 31 will retract adaptively with the reaction force.

[0055] In an optional embodiment, such as Figure 3 As shown, the cutting drive assembly 24 includes a linear drive component 241, which is mounted on the cutter support frame 22 or the adapter plate 28 and can output movement along a preset direction. The preset direction is perpendicular to the transmission direction of the electrode and the cutting direction of the moving blade 27. For ease of understanding, the preset direction is defined as the Z-axis direction in the figure, the transmission direction of the electrode is defined as the X-axis direction in the figure, and the cutting direction of the moving blade 27 is defined as the Y-axis direction in the figure. The output end of the linear drive component 241 is connected to a guide pin 242, which extends along the transmission direction of the electrode, i.e., the X-axis direction. The movable blade holder 26, on the side opposite to the moving blade 27, is connected to a linkage plate 244 via a drive rod 243. A drive block 245 is connected to the linkage plate 244, and the drive block 245 has an arc-shaped drive groove 2451 that slides with the guide pin 242.

[0056] refer to Figure 3 When the linear drive component 241 drives the guide pin 242 to move along the Z-axis, the guide pin 242 slides along the arc-shaped drive groove 2451, thereby driving the drive block 245 to move along the Y-axis. The drive block 245 drives the movable tool holder 26 to move along the Y-axis through the linkage plate 244 and the drive rod 243, thereby driving the moving tool 27 to move along the Y-axis to approach or move away from the fixed tool 25. By setting the above-mentioned cutting drive assembly 24, the displacement of the linear drive component 241 along the Z-axis can be converted into the movement of the moving tool 27 along the Y-axis.

[0057] Optionally, the linear drive component 241 can be a motor lead screw nut, cylinder or any other structure that can achieve linear motion along the Z-axis direction, which are common in the prior art. It will not be described in detail here.

[0058] Optionally, such as Figure 3 As shown, two drive rods 243 are connected between the movable blade holder 26 and the linkage plate 244. The two drive rods 243 are spaced apart along the Z-axis and pass through the cutter support frame 22. In this way, when the linkage plate 244 drives the drive rods 243 to move, the cutter support frame 22 can guide the movement of the drive rods 243, thereby ensuring the accuracy and stability of the overall movement along the Y-axis.

[0059] In another optional embodiment, the cutting drive assembly 24 is not limited to the above-described structure. It can also be a motor screw nut, cylinder, or any other structure that can achieve linear motion, as long as it can drive the moving blade 27 to move along the Y-axis. No specific limitation is made here.

[0060] In an optional embodiment, combined with Figure 1 and Figure 4 The feeding mechanism 50 includes a feeding base 51, a first conveying roller 55 and a second conveying roller 57. The feeding base 51 is slidably connected to the guide rail 10. The first conveying roller 55 and the second conveying roller 57 are movably connected to the feeding base 51. An adjustable feeding gap is formed between the first conveying roller 55 and the second conveying roller 57, which can allow the electrode sheet to pass through. The first conveying roller 55 and the second conveying roller 57 are used to unidirectionally feed the electrode sheet to the cutting mechanism 20.

[0061] The gap between the first conveying roller 55 and the second conveying roller 57 decreases, which can clamp the electrode sheet. As the sheet-feeding base 51 moves along the guide rail 10, it conveys the electrode sheet to the cutting mechanism 20. The gap between the first conveying roller 55 and the second conveying roller 57 increases, which releases the electrode sheet, allowing it to pass through the gap for conveying and completing the winding. The first conveying roller 55 and the second conveying roller 57 are unidirectional rollers, that is, they are in the direction of conveying towards the cutting mechanism 20, to prevent the electrode sheet from slipping back and flying off.

[0062] Specifically, such as Figure 4 As shown, the wafer feeding mechanism 50 also includes a wafer feeding support frame 52, which is connected to the wafer feeding base 51. A fixed mounting base 54 is connected to the wafer feeding support frame 52. A first conveying roller 55 is rotatably connected to the fixed mounting base 54. A wafer feeding drive assembly 53 is connected to the wafer feeding base 51 and / or the wafer feeding support frame 52. A movable mounting base 56 is connected to the output end of the wafer feeding drive assembly 53. A second conveying roller 57 is rotatably connected to the movable mounting base 56. The wafer feeding drive assembly 53 is used to drive the second conveying roller 57 to move closer to the first conveying roller 55 to clamp the electrode.

[0063] Combination Figure 4 The first conveying roller 55 is fixed in position. The sheet feeding drive assembly 53 drives the movable mounting base 56 to move along the Y-axis. The movable mounting base 56 drives the second conveying roller 57 to move, causing the second conveying roller 57 to move closer to or further away from the first conveying roller 55. When the second conveying roller 57 moves closer to the first conveying roller 55, the sheet feeding gap decreases, clamping the electrode sheet and conveying it to the cutting mechanism 20. When the second conveying roller 57 moves further away from the first conveying roller 55, the sheet feeding gap increases, and the electrode sheet passes through the sheet feeding gap for conveying, completing the winding.

[0064] Optionally, the feeding drive assembly 53 can be a motor, lead screw and nut, cylinder or any other structure that can achieve linear motion along the Y-axis, which are common in the prior art. It will not be described in detail here.

[0065] In an optional embodiment, such as Figure 4 As shown, the electrode feeding mechanism 50 also includes a first guide plate 58 and a second guide plate 59 disposed on the electrode feeding base 51. Specifically, the first guide plate 58 is connected to the fixed mounting base 54, and the second guide plate 59 is connected to the movable mounting base 56. The first guide plate 58 is located downstream of the first conveying roller 55, and the second guide plate 59 is located downstream of the second conveying roller 57. A guide channel for guiding the electrode conveying is formed between the first guide plate 58 and the second guide plate 59. The electrode output from the first conveying roller 55 and the second conveying roller 57 enters the guide channel for continued conveying, and the guide channel is used to guide the conveying of the electrode.

[0066] Optionally, such as Figure 4 As shown, the size of the first guide plate 58 is larger than that of the second guide plate 59. The first guide plate 58 can be a vacuum adsorption plate, which prevents the electrode from shifting by vacuum adsorption.

[0067] In an optional embodiment, such as Figure 1As shown, the electrode tracking and cutting device also includes an electrode guide roller 70, which is located upstream of the feeding mechanism 50 and connected to the feeding base 51. An electrode smoothing plate 71 is mounted on the electrode guide roller 70. The electrode smoothing plate 71 is used to change the direction of external electrodes before conveying them to the feeding mechanism 50. The electrode smoothing plate 71 is used to change the direction of the electrodes, guiding the externally introduced electrodes between the first conveying roller 55 and the second conveying roller 57 for conveying.

[0068] In an optional embodiment, such as Figure 1 As shown, the electrode tracking and cutting device also includes a base plate 80, and the guide rail 10, the first drive mechanism 40, and the second drive mechanism 60 are all connected to the base plate 80. By setting the base plate 80, all the mechanisms can be integrated on the base plate 80, resulting in a high degree of integration.

[0069] The side closer to the upstream is defined as the rear side, and the side closer to the downstream is defined as the front side. The working principle of the electrode tracking and cutting device provided in this embodiment is as follows:

[0070] In Action 1, when winding a new battery cell, the electrode sheet is first clamped by the first conveying roller 55 and the second conveying roller 57, and the electrode sheet head is in the cutting mechanism 20. At this time, the cutting mechanism 20 and the pressing mechanism 30 are at the foremost side of the stroke. Then, the first conveying roller 55 and the second conveying roller 57 clamp the electrode sheet and convey it forward. Driven by the first conveying roller 55 and the second conveying roller 57, the electrode sheet enters the winding needle to start the winding process. At this time, the state is as in Action 2.

[0071] During the winding process of the needle winding mechanism, the feeding mechanism 50, the cutting mechanism 20 and the clamping mechanism 30 move backward in sequence to the last side of their respective strokes to prepare for the next electrode chasing and cutting action. At this time, the state is as in action three.

[0072] After the electrode sheet is wound to a set length under the control of the encoder, the first drive mechanism 40 drives the cutting mechanism 20 and the clamping mechanism 30 to accelerate synchronously and move along the guide rail 10. The second drive mechanism 60 drives the feeding mechanism 50 to accelerate and move along the guide rail 10. When the speeds of the feeding mechanism 50, the cutting mechanism 20, the clamping mechanism 30, and the electrode sheet are consistent, under the drive of the feeding drive assembly 53, the second conveying roller 57 approaches the first conveying roller 55 to clamp the electrode sheet and feeds it to the cutting mechanism 20. At the same time, under the drive of the cutting drive assembly 24, the moving blade 27 and the clamping mechanism 30 simultaneously approach the fixed blade 25, and the pressure plate 32 first presses the electrode sheet... The electrode sheet is pressed against the fixed blade 25, so that the electrode sheet and the cutting mechanism 20 maintain the same speed. The moving blade 27 then quickly cuts the electrode sheet. After cutting, the cutting drive assembly 24 resets. Then, the first drive mechanism 40 drives the cutting mechanism 20 and the pressing mechanism 30 to decelerate to zero and reach the front end of the stroke. At the same time, the second drive mechanism 60 drives the feeding mechanism 50 to continue to move forward a certain distance. The purpose is to send the electrode sheet head behind the cutting position out of the cutting mechanism 20 to ensure that the electrode sheet can be smoothly fed in and wound in the next cycle. After that, the second drive mechanism 60 drives the feeding mechanism 50 to decelerate to zero. At this time, the state is as in action four.

[0073] Finally, the second drive mechanism 60 drives the wafer feeding mechanism 50 back to the end of its stroke, and repeats the above action process in a cyclical manner, thereby achieving high-efficiency production of battery cells.

[0074] This embodiment also provides a winding machine, including a winding needle and the aforementioned electrode cutting device. The electrode cutting device is located upstream of the winding needle and is used to transport the electrode to the winding needle. The winding machine provided in this embodiment, by employing the aforementioned electrode cutting device, can reduce problems such as burrs and powder shedding at the electrode cutting edge, and improve the cutter life and electrode cutting speed.

[0075] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electrode tracking and cutting device, characterized in that, include: Guide rail (10); A cutting mechanism (20) is slidably disposed on the guide rail (10). The cutting mechanism (20) is used to cut the electrode when it is accelerated to be transmitted synchronously with the electrode. A pressing mechanism (30) is slidably disposed on the guide rail (10). The pressing mechanism (30) is used to press the electrode sheet onto the cutting mechanism (20) before the cutting mechanism (20) cuts the electrode sheet. The first driving mechanism (40) is connected to the cutting mechanism (20) and the pressing mechanism (30) respectively, and is used to drive the cutting mechanism (20) and the pressing mechanism (30) to move synchronously back and forth along the guide rail (10); The electrode feeding mechanism (50) is slidably disposed on the guide rail (10) and located upstream of the cutting mechanism (20) and the clamping mechanism (30). The electrode feeding mechanism (50) is used to clamp the electrode to the cutting mechanism (20). The second drive mechanism (60) is connected to the wafer feeding mechanism (50) and is used to drive the wafer feeding mechanism (50) to reciprocate along the guide rail (10).

2. The electrode tracking and cutting device according to claim 1, characterized in that, The cutting mechanism (20) includes a fixed base (21) which is slidably connected to the guide rail (10). A cutter support frame (22) is connected to the fixed base (21). A fixed blade holder (23) and a cutting drive assembly (24) are connected to the cutter support frame (22). A fixed blade (25) is mounted on the fixed blade holder (23). A movable blade holder (26) is connected to the output end of the cutting drive assembly (24). A moving blade (27) is mounted on the movable blade holder (26). A cutting gap is formed between the moving blade (27) and the fixed blade (25) that can pass through the electrode sheet. The cutting drive assembly (24) is used to drive the moving blade (27) to move closer to the fixed blade (25) to cut the electrode sheet.

3. The electrode tracking and cutting device according to claim 2, characterized in that, The clamping mechanism (30) is disposed on the cutting mechanism (20).

4. The electrode tracking and cutting device according to claim 3, characterized in that, The clamping mechanism (30) includes a clamping drive (31) and a pressure plate (32). The clamping drive (31) is mounted on the movable tool holder (26). The output shaft of the clamping drive (31) passes through the movable tool holder (26) and is connected to the pressure plate (32). The pressure plate (32) and the fixed tool (25) are arranged opposite to each other.

5. The electrode tracking and cutting device according to claim 4, characterized in that, In the cutting direction of the moving blade (27), the pressure plate (32) protrudes from the moving blade (27).

6. The electrode tracking and cutting device according to claim 2, characterized in that, The cutting drive assembly (24) includes a linear drive component (241), which is mounted on the cutter support frame (22) and can output movement in a preset direction. The preset direction is perpendicular to the transmission direction of the electrode and the cutting direction of the moving blade (27). The output end of the linear drive component (241) is connected to a guide pin (242), which extends along the transmission direction of the electrode. The movable blade holder (26) is connected to a linkage plate (244) on the side away from the moving blade (27) via a drive rod (243). A drive block (245) is connected to the linkage plate (244), and an arc-shaped drive groove (2451) is provided on the drive block (245) that slides with the guide pin (242).

7. The electrode tracking and cutting device according to claim 1, characterized in that, The feeding mechanism (50) includes a feeding base (51), a first conveying roller (55), and a second conveying roller (57). The feeding base (51) is slidably connected to the guide rail (10). The first conveying roller (55) and the second conveying roller (57) are movably connected to the feeding base (51). An adjustable feeding gap is formed between the first conveying roller (55) and the second conveying roller (57) that can pass through the electrode sheet. The first conveying roller (55) and the second conveying roller (57) are used to unidirectionally feed the electrode sheet to the cutting mechanism (20).

8. The electrode tracking and cutting device according to claim 7, characterized in that, The electrode feeding mechanism (50) further includes a first guide plate (58) and a second guide plate (59) disposed on the electrode feeding base (51). The first guide plate (58) is located downstream of the first conveying roller (55), and the second guide plate (59) is located downstream of the second conveying roller (57). A guide channel for guiding the electrode conveying is formed between the first guide plate (58) and the second guide plate (59).

9. The electrode tracking and cutting device according to claim 1, characterized in that, It also includes an electrode roller (70), which is located upstream of the feeding mechanism (50). An electrode smoothing plate (71) is provided on the electrode roller (70), which is used to change the direction of the external electrode and transport it to the feeding mechanism (50).

10. A winding machine, characterized in that, Includes the electrode tracking and cutting device as described in any one of claims 1-9.

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