Pole piece pre-bending device

Abstract

The utility model discloses a pole piece pre-bending device. The pole piece pre-bending device comprises a conveying mechanism, a propelling mechanism, a material sucking mechanism and a clamping plate mechanism. The conveying mechanism is used for conveying pole pieces; the propelling mechanism and the clamping plate mechanism are arranged on the two sides of the conveying mechanism respectively in the direction perpendicular to the conveying direction of the pole pieces; the pushing mechanism is used for pushing the pole piece to a preset position through the clamping plate mechanism; the material suction mechanism is arranged at a preset position and is used for adsorbing and fixing the pole piece, and the pole piece is clamped through the clamping plate mechanism so that the pole piece can be pre-bent. According to the application, the pole piece is adsorbed to the preset position, and then the pole piece is clamped by the clamping plate mechanism to bend the pole piece, so that a part of powder is pre-dropped at the bending part of the pole piece, the problem of powder dropping in the process of preparing a battery cell from the pole piece can be reduced, the risk of short circuit of the battery cell is reduced, and the performance of a battery is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of pole piece production, and specifically relates to a pole piece pre-bending device. Background Art

[0002] At present, electronic products are widely used due to their advantages such as portability and lightness. Batteries, as the core components of electronic products, drive the normal operation of electronic products. Battery processing includes front-end processes, middle-end processes and back-end processes.

[0003] In the related art, the electrode sheets prepared in the previous step are usually wound together with the separator into a battery cell in the middle process. However, when the electrode sheets are wound, the electrode sheets will bend, and powder will fall off at the bends, which will cause the battery cell to short-circuit and affect the performance of the battery. Utility Model Content

[0004] The present application aims to provide a pole piece pre-bending device, which can solve the problem that when the pole piece is wound, the pole piece will be bent and powder will fall off at the bending point, which will cause the battery cell to short-circuit and affect the performance of the battery.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The embodiment of the present application proposes a pole piece pre-bending device, comprising: a conveying mechanism, a propulsion mechanism, a suction mechanism and a clamping mechanism; the conveying mechanism is used to convey the pole piece; along a conveying direction perpendicular to the pole piece, the propulsion mechanism and the clamping mechanism are respectively arranged on both sides of the conveying mechanism; the propulsion mechanism is used to push the pole piece through the clamping mechanism to a preset position; the suction mechanism is arranged at the preset position, and the suction mechanism is used to adsorb and fix the pole piece, and clamp the pole piece through the clamping mechanism to pre-bend the pole piece.

[0007] Optionally, the pole piece pre-bending device also includes an identification mechanism and a first controller; a mark is preset on the pole piece, and the identification mechanism is arranged on the side of the conveying mechanism close to the propulsion mechanism for identifying the mark; the first controller is electrically connected to the identification mechanism and the propulsion mechanism respectively, and is used to control the operation of the propulsion mechanism based on the identification result of the identification mechanism.

[0008] Optionally, the suction mechanism includes a first suction piece, a first connecting tube and a first negative pressure mechanism; the first suction piece is arranged at the preset position, one end of the first connecting tube is connected to the first suction piece, and the first negative pressure mechanism is connected to the other end of the first connecting tube; the first negative pressure mechanism is used to provide negative pressure to the first suction piece, so that the first suction piece can absorb and fix the pole piece and absorb powder generated by the bending of the pole piece.

[0009] Optionally, the suction mechanism further includes a first air volume adjusting member; the first air volume adjusting member is disposed at one end of the first connecting tube close to the first suction member, and the first air volume adjusting member is used to adjust the suction force of the first suction member.

[0010] Optionally, the suction mechanism also includes two clamping components; a first suction port is provided on the side of the first suction member facing the clamping mechanism, and the two clamping components are both provided at the first suction port, and a first clamping space is formed between the two clamping components. The two clamping components can move relative to each other to adjust the size of the first clamping space, and the pole piece is auxiliary clamped through the first clamping space.

[0011] Optionally, the two clamping assemblies each include a first clamping member and a first driving member; the first driving member is installed at the first suction port, and the first clamping member is connected to the first driving member; the first driving member is used to drive the first clamping member to move to adjust the size of the first clamping space.

[0012] Optionally, the propulsion mechanism includes a first fixed seat, a second driving member, a first transmission structure and a first push roller; the first fixed seat is arranged on one side of the transmission mechanism along a transmission direction perpendicular to the pole piece, the first transmission structure is movably connected to the first fixed seat, and the first push roller is connected to the first transmission structure; the second driving member is connected to the first transmission structure, and is used to drive the first transmission structure to move, and drive the first push roller to move through the first transmission structure to push the pole piece to the preset position.

[0013] Optionally, the clamping mechanism includes a second fixed seat, a third driving member and two clamping plate assemblies; the second fixed seat is arranged on the other side of the conveying mechanism along a transmission direction perpendicular to the pole piece, the two clamping plate assemblies are respectively movably connected to the second fixed seat, a second clamping space is formed between the two clamping plate assemblies, and the propulsion mechanism pushes the pole piece through the second clamping space to the preset position; the third driving member is respectively connected to the two clamping plate assemblies, and is used to drive the two clamping plate assemblies to move relative to each other, so as to adjust the size of the second clamping space, and clamp the pole piece through the second clamping space to pre-bend the pole piece.

[0014] Optionally, the clamping plate assembly includes: a second transmission member, a second connecting member and a pressure plate; the second transmission member is movably connected to the second fixed seat, the second connecting member is slidably connected to the second transmission member, and the pressure plate is fixedly connected to the second connecting member; the fourth driving member is connected to the second transmission member, for driving the second transmission member to move, and driving the second connecting member and the pressure plate to move through the second transmission member.

[0015] Optionally, the pole piece pre-bending device also includes a third fixed seat, a fourth driving member and two clamping roller assemblies; the third fixed seat is arranged on the side of the clamping plate mechanism close to the conveying mechanism, and the two clamping roller assemblies are respectively movably connected to the third fixed seat, and a third clamping space is formed between the two clamping roller assemblies; the propulsion mechanism is used to push the pole piece through the third clamping space and the clamping plate mechanism to a preset position; the fourth driving member is respectively connected to the two clamping roller assemblies, and is used to drive the two clamping roller assemblies to move relative to each other, so as to adjust the size of the third clamping space and assist in clamping the pole piece through the third clamping space.

[0016] Optionally, the clamping roller assembly includes: a third transmission member, a third connecting member and a clamping roller; the third transmission member is movably connected to the third fixed seat, the third connecting member is slidably connected to the third transmission member, and the clamping roller is fixedly connected to the third connecting member; the fifth driving member is connected to the third transmission member, for driving the third transmission member to move, and drives the third connecting member and the clamping roller to move through the third transmission member.

[0017] Optionally, the pole piece pre-bending device also includes two dust removal assemblies and a second negative pressure mechanism; the dust removal assembly is arranged at the downward workstation of the clamping mechanism, and the two dust removal assemblies are arranged opposite to each other, and the conveying mechanism is also used to transfer the pre-bent pole piece to between the two dust removal assemblies; the second negative pressure mechanism is respectively connected to the two dust removal assemblies, and the second negative pressure mechanism is used to provide negative pressure to the dust removal assembly so that the dust removal assembly absorbs the powder on the surface of the pole piece.

[0018] Optionally, the dust removal assembly includes a rotating brush, a second suction piece and a second connecting pipe; the second suction piece is arranged at the downward workstation of the clamping mechanism, one end of the second connecting pipe is connected to the second suction piece, and the second negative pressure mechanism is connected to the other end of the second connecting pipe; the second suction piece is provided with a second suction port, the rotating brush is arranged at the second suction port, the rotating brush can rotate relative to the second suction piece to brush off the powder on the surface of the pole piece, and the second negative pressure mechanism is used to provide negative pressure to the second suction piece so that the second suction piece can absorb the powder on the surface of the pole piece.

[0019] In an embodiment of the present application, a pole piece pre-bending device includes a conveying mechanism, a propulsion mechanism, a suction mechanism and a clamping mechanism. The conveying mechanism conveys the pole piece along a conveying direction perpendicular to the pole piece. The propulsion mechanism and the clamping mechanism are respectively arranged on both sides of the conveying mechanism. The suction mechanism is arranged at a preset position, and the pole piece is pushed to the preset position through the clamping mechanism by the propulsion mechanism. The suction mechanism adsorbs and fixes the pole piece, and the clamping mechanism clamps the pole piece to pre-bend the pole piece. The present application adsorbs the pole piece to the preset position, and then clamps the pole piece by the clamping mechanism to bend the pole piece. In this way, the pole piece can lose some powder in advance at the bending part, thereby reducing the problem of powder loss in the process of preparing battery cells from the pole piece, thereby reducing the risk of battery cell short circuit and improving battery performance.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic diagram of a pole piece pre-bending device according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a pole piece according to an embodiment of the present application;

[0024] Figure 3 is a front view of a material suction mechanism according to an embodiment of the present application;

[0025] Figure 4 is a partial structural schematic diagram of a material suction mechanism according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a propulsion mechanism according to an embodiment of the present application;

[0027] Figure 6 is a top view of a clamping mechanism according to an embodiment of the present application;

[0028] Figure 7 is a side view of a clamping mechanism according to an embodiment of the present application;

[0029] Figure 8 is a schematic diagram of a clamping roller assembly according to an embodiment of the present application;

[0030] Fig. 9 is a front view of a dust removal assembly according to an embodiment of the present application;

[0031] Fig.10 It is a side view of a dust removal assembly according to an embodiment of the present application.

[0032] Reference numerals:

[0033] 1-transmission mechanism; 2-propelling mechanism; 3-suction mechanism; 4-clamping mechanism; 5-pole piece; 6-identification mechanism; 7-display screen; 8-logo; 9-first controller;

[0034] 101-dust removal component; 102-second negative pressure mechanism; 103-rotating brush; 104-second suction member; 105-second connecting pipe; 106-fourth sensor; 107-second air volume adjustment member; 108-fifth driving member; 109-second suction port;

[0035] 201-first fixed seat; 202-first push roller; 203-first transmission structure; 204-first connecting member; 205-first slide; 206-second driving member; 207-second controller; 208-first transmission member;

[0036] 301-first suction member; 302-first connecting pipe; 303-first negative pressure mechanism; 304-first air volume adjustment member; 305-first sensor; 306-air compressor; 307-second sensor; 308-clamping assembly; 309-first suction port; 310-first clamping space; 311-first clamping member; 312-first driving member;

[0037] 401-second fixing seat; 402-third driving member; 403-clamping plate assembly; 404-third controller; 405-third sensor; 406-second connecting member; 407-second transmission member; 408-pressing plate; 409-second clamping space;

[0038] 501 - third fixed seat; 502 - fourth driving member; 503 - clamping roller assembly; 504 - third clamping space; 505 - third transmission member; 506 - third connecting member; 507 - clamping roller; 508 - fourth controller. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be described in detail below, and examples of the embodiments 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 application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0040] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred mechanism or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The pole piece pre-bending device provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0044] In the traditional lithium-ion battery production process, since the lithium-ion negative electrode plate adopts the water-based stirring method, compared with the oil-based stirring method of the positive electrode plate, in the middle process, the battery cell is more likely to lose powder at the inner corner during the core pre-pressing and hot pressing process, especially at the 1-3 folds of the innermost corner of the wound battery cell, which will increase the difficulty of foreign matter control and exceed the foreign matter standard. Moreover, the powder dropped from the negative and positive electrode plates will physically break through the diaphragm, resulting in failure of the dielectric withstand voltage test (High potential test electrical safety stress test, Hipot), thereby scrapping the battery cell and reducing the yield. Finally, even if the positive and negative battery cells can successfully pass the Hipot test in the three processes of hot pressing, top cover welding and one-time injection, after the chemical composition, charge and discharge, the diaphragm will swell after being soaked in the electrolyte, and the negative electrode charge rebound will cause the diaphragm to be further punctured, with the risk of explosion and fire.

[0045] like Figure 1 to Figure 2 As shown, according to some embodiments of the present application, the pole piece pre-bending device includes: a conveying mechanism 1, a propulsion mechanism 2, a suction mechanism 3 and a clamping mechanism 4; the conveying mechanism 1 is used to convey the pole piece 5; along the conveying direction perpendicular to the pole piece 5, the propulsion mechanism 2 and the clamping mechanism 4 are respectively arranged on both sides of the conveying mechanism 1; the propulsion mechanism 2 is used to push the pole piece 5 through the clamping mechanism 4 to a preset position; the suction mechanism 3 is arranged at a preset position, and the suction mechanism 3 is used to adsorb and fix the pole piece 5, and clamp the pole piece 5 through the clamping mechanism 4 to pre-bend the pole piece 5.

[0046] In an embodiment of the present application, the electrode pre-bending device includes a conveying mechanism 1, a propulsion mechanism 2, a suction mechanism 3 and a clamping mechanism 4. The conveying mechanism 1 conveys the electrode 5 along a conveying direction perpendicular to the electrode 5. The propulsion mechanism 2 and the clamping mechanism 4 are respectively arranged on both sides of the conveying mechanism 1. The suction mechanism 3 is arranged at a preset position. The propulsion mechanism 2 pushes the electrode 5 through the clamping mechanism 4 to the preset position. The suction mechanism 3 adsorbs and fixes the electrode 5, and the clamping mechanism 4 clamps the electrode 5 to pre-bend the electrode 5. The present application adsorbs the electrode 5 to the preset position, and then clamps the electrode 5 through the clamping mechanism 4 to bend the electrode 5. In this way, the electrode 5 can lose part of the powder at the bending point in advance, thereby reducing the problem of powder loss in the process of preparing the battery cell from the electrode 5, thereby reducing the risk of battery cell short circuit and improving the performance of the battery.

[0047] Specifically, the pre-bending device of the embodiment of the present application is applied in the front-end process of battery processing, that is, in the die-cutting-slitting process of producing the pole piece 5. The battery type in the embodiment of the present application can be a lithium-ion battery, a nickel-hydrogen battery, etc.

[0048] Specifically, Figure 1As shown, the transmission mechanism 1 can be two transmission rollers arranged opposite to each other, and the transmission rollers play the role of transmitting the pole piece 5; the transmission mechanism 1 can also be a rotating shaft arranged opposite to each other, and the rotating shaft rotates to transmit the pole piece 5. In addition, the transmission direction of the pole piece 5 is the arrangement direction of the two transmission rollers arranged opposite to each other.

[0049] It should be noted that the preset position may be the suction port position of the suction mechanism 3 , and the propulsion mechanism 2 may push the pole piece 5 to pass through the suction port position of the clamping mechanism 4 , or may push the pole piece 5 through the suction port to reach the first clamping space 310 .

[0050] Alternatively, if Figures 1 to 5 As shown, it also includes an identification mechanism 6 and a first controller 9; an identification mark 8 is preset on the pole piece 5, and the identification mechanism 6 is arranged on the side of the transmission mechanism 1 close to the propulsion mechanism 2, and is used to identify the identification mark 8; the first controller 9 is electrically connected to the identification mechanism 6 and the propulsion mechanism 2 respectively, and is used to control the operation of the propulsion mechanism 2 based on the identification result of the identification mechanism 6.

[0051] In the embodiment of the present application, by arranging the identification mechanism 6 on the side of the transmission mechanism 1 close to the propulsion mechanism 2, a mark 8 is preset on the pole piece 5, and the first controller 9 is electrically connected to the identification mechanism 6 and the propulsion mechanism 2 respectively. In this way, the identification mechanism 6 identifies the mark 8 on the pole piece 5 and sends the identification result to the first controller 9. The first controller 9 controls the propulsion mechanism 2 to push the pole piece 5 to the preset position according to the identification result, so as to improve the accuracy of the propulsion of the propulsion mechanism 2.

[0052] Specifically, Figure 2 As shown, the positions of the first to fifth folds of the innermost circle of the battery are calculated and theoretically verified in advance at the cell design end, and a mark 8 is set at the bend; the mark 8 can be an optical positioning point (marking), and the optical positioning point can be a small hole penetrating the surface of the pole piece 5, or it can be a marking point set on one side of the pole piece 5, and the marking point does not damage the pole piece 5.

[0053] Specifically, the recognition device can be a camera with a charge coupled device (CCD) or other camera; the recognition device generates a recognition signal after recognizing the logo 8, and the recognition device sends the recognition signal to the first controller 9. At this time, the transmission mechanism is briefly paused, and the first controller 9 controls the propulsion mechanism 2 to push the pole piece 5 to a preset position according to the recognition signal.

[0054] In the embodiment of the present application, a display screen 7 may also be included. The display screen 7 is connected to the first controller 9. The status of each mechanism in the pole piece pre-bending device can be displayed on the display screen, so as to realize communication and interaction between the operator and the control system, understand and control the operating status of the equipment, and improve efficiency and safety.

[0055] It should be noted that the first controller 9 may be a programmable logic controller (PLC) or other controllers, which is not limited in the embodiment of the present application.

[0056] Optionally, the suction mechanism 3 includes a first suction piece 301, a first connecting tube 302 and a first negative pressure mechanism 303; the first suction piece 301 is arranged at a preset position, one end of the first connecting tube 302 is connected to the first suction piece 301, and the first negative pressure mechanism 303 is connected to the other end of the first connecting tube 302; the first negative pressure mechanism 303 is used to provide negative pressure to the first suction piece 301, so that the first suction piece 301 can adsorb and fix the electrode piece 5 and absorb the powder generated by the bending of the electrode piece 5.

[0057] In the embodiment of the present application, the first suction member 301 is set at a preset position, one end of the first connecting tube 302 is connected to the first suction member 301, and the first negative pressure mechanism 303 is connected to the other end of the first connecting tube 302. The first negative pressure mechanism 303 provides negative pressure to the first suction member 301. In this way, negative pressure is formed at the first suction member 301 to adsorb and fix the pole piece 5, and the auxiliary clamping plate mechanism 4 clamps and bends the pole piece 5, and can also absorb the powder generated by the bending of the pole piece 5.

[0058] It should be noted that the first suction member 301 may be a dust suction funnel, the first connecting pipe 302 may be a hose, and the first negative pressure mechanism 303 may be a negative pressure vacuum cleaner, which is not limited in the embodiment of the present application.

[0059] Optionally, the suction mechanism 3 further includes a first air volume adjustment member 304 ; the first air volume adjustment member 304 is disposed at one end of the first connecting tube 302 close to the first suction member 301 , and the first air volume adjustment member 304 is used to adjust the suction force of the first suction member 301 .

[0060] In the embodiment of the present application, a first air volume regulating member 304 is provided in the suction mechanism 3, and the first air volume regulating member 304 is provided at one end of the first connecting tube 302 close to the first suction member 301. In this way, the air volume in the first connecting tube 302 can be adjusted according to the first air volume regulating member 304.

[0061] In some embodiments, the material suction mechanism 3 further includes a first sensor 305, which is electrically connected to the first controller 9, and is disposed between the first air volume adjustment member 304 and the first connecting pipe 302. The first sensor 305 is used to monitor the pressure value in the first connecting pipe 302 and send the pressure value to the first controller 9. The first controller 9 dynamically adjusts the size of the first air volume adjustment member 304 according to the pressure value monitored by the first sensor 305 to ensure that the negative pressure flow rate in the first connecting member 204 is maintained within a certain range.

[0062] It should be noted that the first air volume adjustment member 304 may be a pneumatic valve or an electric valve with a feedback signal, and the first sensor 305 may be a negative pressure sensor, which is not limited in the present application.

[0063] Optionally, the suction mechanism 3 also includes two clamping assemblies 308; a first suction port 309 is provided on the side of the first suction member 301 facing the clamping mechanism 4, and the two clamping assemblies 308 are both provided at the first suction port 309, and a first clamping space 310 is formed between the two clamping assemblies 308. The two clamping assemblies 308 can move relative to each other to adjust the size of the first clamping space 310, and form auxiliary clamping for the pole piece 5 through the first clamping space 310.

[0064] In the embodiment of the present application, a first suction port 309 is provided on the side of the first suction member 301 facing the clamping mechanism 4, and two clamping components 308 are provided at the first suction port 309 to form a first clamping space 310. The two clamping components 308 can move relative to each other to adjust the size of the first clamping space 310. In this way, while the first suction member 301 adsorbs and fixes the pole piece 5, the pole piece 5 can be further fixed by adjusting the size of the first clamping space 310, thereby improving the stability of clamping the pole piece 5.

[0065] Specifically, when the propulsion mechanism 2 pushes the pole piece 5 to the preset position, the preset position is now the interior of the first suction member 301, and the first negative pressure mechanism 303 provides negative pressure to adsorb and fix the pole piece 5, and then the propulsion mechanism 2 returns to the initial position, and the two clamping components 308 move relative to the position of the pole piece 5 to clamp the pole piece 5.

[0066] Alternatively, if Figure 3 to Figure 4 As shown, the clamping assembly 308 includes a first clamping member 311 and a first driving member 312; the first driving member 312 is installed at the first suction port 309, and the first clamping member 311 is connected to the first driving member 312; the first driving member 312 is used to drive the first clamping member 311 to move to adjust the size of the first clamping space 310.

[0067] In the embodiment of the present application, the first clamping member 311 and the first driving member 312 are installed at the first suction port 309, and the first clamping member 311 is connected to the first driving member 312, so that the first driving member 312 can drive the first clamping member 311 to move to adjust the size of the first clamping space 310 so as to clamp the electrode 5.

[0068] In some embodiments, Figure 3As shown, a second sensor 307 can also be provided on the first clamping member 311, and the second sensor 307 is used to monitor the pressure between the two clamping members. When the pressure between the clamping members is too large, the second sensor 307 sends a signal to the first controller 9, and the first controller 9 controls the first driving member 312 according to the signal, thereby controlling the movement of the first clamping member 311.

[0069] It should be noted that the first driving member 312 may be a combination of a cylinder and a solenoid valve, or a driving motor with a control chip. The first clamping member 311 may be a clamping claw or other clamping devices.

[0070] In some embodiments, the suction mechanism 3 may further include an air compressor 306. In this case, the first driving member 312 is a combination of a cylinder and a solenoid valve. The air compressor 306 is connected to the cylinder to provide a power source for the cylinder.

[0071] Alternatively, if Figure 5 As shown, the propulsion mechanism 2 includes a first fixed seat 201, a second driving member 206, a first transmission structure 203 and a first push roller 202; the first fixed seat 201 is arranged on one side of the transmission mechanism 1 along a transmission direction perpendicular to the pole piece 5, the first transmission structure 203 is movably connected to the first fixed seat 201, and the first push roller 202 is connected to the first transmission structure 203; the second driving member 206 is connected to the first transmission structure 203, and is used to drive the first transmission structure 203 to move, and drives the first push roller 202 to move through the first transmission structure 203 to push the pole piece 5 to a preset position.

[0072] In the embodiment of the present application, a first fixing seat 201 is provided on a side perpendicular to the transmission direction of the pole piece 5, a first transmission structure 203 is movably connected to the first fixing seat 201, a first push roller 202 is connected to the first transmission structure 203, and a second driving member 206 is connected to the first transmission structure 203. In this way, when the second driving member 206 drives the first transmission structure 203, the first push roller 202 can be driven by the first transmission structure 203 to move and push the pole piece 5 to a preset position, so that the suction mechanism 3 can adsorb and fix the pole piece 5.

[0073] Specifically, the first transmission structure 203 includes a first transmission member 208 and a first connecting member 204. The first transmission member 208 is rotatably connected to the first fixed seat 201, and the first connecting member 204 is slidably connected to the first transmission member 208. The first push roller 202 is fixedly connected to the first connecting member 204, so that the reciprocating movement of the first push roller 202 can be achieved.

[0074] In an embodiment of the present application, the propulsion mechanism 2 also includes a second controller 207, which is electrically connected to the first controller 9. The first controller 9 generates a control signal based on the recognition result of the recognition mechanism 6 and sends it to the second controller 207. The second controller 207 controls the second driving member 206 based on the control signal.

[0075] It should be noted that the second controller 207 can be a servo controller, the second driving member 206 can be a servo motor, the first transmission member 208 can be a screw rod, and the first connecting member 204 is a slider; the screw rod rotates under the drive of the servo motor, and the slider is slidingly connected to the screw rod, and the slider converts the rotation of the screw rod into linear motion. The servo controller receives the signal from the first controller 9, changes the rotation angle or speed of the screw rod, and then realizes the control of the movement position of the slider, thereby realizing precise position adjustment.

[0076] In some embodiments, a first slide 205 is provided on the first fixed seat 201, and the first slide 205 is provided on both sides of the first transmission member 208, and both sides of the first connecting member 204 extend into the first slide 205. In this way, when the first connecting member 204 moves back and forth and thereby drives the movement of the first push roller 202, the reciprocating movement of the first connecting member 204 can be made smoother.

[0077] Alternatively, if Figure 6 to Figure 7 As shown, the clamping mechanism 4 includes a second fixed seat 401, a third driving member 402 and two clamping plate assemblies 403; the second fixed seat 401 is arranged on the other side of the transmission mechanism 1 along a transmission direction perpendicular to the pole piece 5, and the two clamping plate assemblies 403 are respectively movably connected to the second fixed seat 401, and a second clamping space 409 is formed between the two clamping plate assemblies 403. The propulsion mechanism 2 pushes the pole piece 5 through the second clamping space 409 to a preset position; the third driving member 402 is respectively connected to the two clamping plate assemblies 403, and is used to drive the two clamping plate assemblies 403 to move relative to each other, so as to adjust the size of the second clamping space 409, and clamp the pole piece 5 through the second clamping space 409 to pre-bend the pole piece 5.

[0078] In the embodiment of the present application, the clamping mechanism 4 includes a second fixing seat 401, a third driving member 402 and two clamping plate assemblies 403. The second fixing seat 401 is arranged on the other side of the transmission mechanism 1 perpendicular to the transmission direction of the pole piece 5, and the two clamping plate assemblies 403 are respectively movably connected to the second fixing seat 401, and a second clamping space 409 is formed between the two clamping plate assemblies 403. The third driving member 402 is respectively connected to the two clamping plate assemblies 403, and is used to drive the two clamping plate assemblies 403 to move relative to each other to adjust the size of the second clamping space 409. In this way, the propulsion mechanism 2 pushes the pole piece 5 through the second clamping space 409 to the preset position, and the second clamping space 409 can be adjusted to clamp the pole piece 5 so that the pole piece 5 is pre-bent, and then the pole piece 5 is dropped at the bending part, thereby reducing the risk of short circuit of the battery cell and improving the performance of the battery.

[0079] Alternatively, if Figure 6 to Figure 7 As shown, the clamping plate assembly 403 includes: a second transmission member 407, a second connecting member 406 and a pressure plate 408; the second transmission member 407 is movably connected to the second fixed seat 401, the second connecting member 406 is slidably connected to the second transmission member 407, and the pressure plate 408 is fixedly connected to the second connecting member 406; the third driving member 402 is connected to the second transmission member 407, and is used to drive the second transmission member 407 to move, and drive the second connecting member 406 and the pressure plate 408 to move through the second transmission member 407.

[0080] In the embodiment of the present application, the clamping plate assembly 403 includes: a second transmission member 407, a second connecting member 406 and a pressing plate 408, wherein the second transmission member 407 is movably connected to the second fixing seat 401, the second connecting member 406 is slidably connected to the second transmission member 407, and the pressing plate 408 is fixedly connected to the second connecting member 406; the third driving member 402 is connected to the second transmission member 407. In this way, when the third driving member 402 drives the second transmission member 407 to move, the second connecting member 406 and the pressing plate 408 can be driven to move by the second transmission member 407, and then the pole piece 5 can be pressed by the pressing plate 408, so as to facilitate bending and shedding of the pole piece 5.

[0081] In some embodiments, the clamping plate mechanism 4 further includes a third controller 404 and a third sensor 405. The third sensor 405 is disposed on the inner side of the clamping plate, and the third sensor 405 is electrically connected to the first controller 9. The output end of the third controller 404 is connected to the third driving member 402, and the input end is connected to the first controller 9. When the pressing plate 408 compresses and bends the pole piece 5, the third sensor 405 generates pressure data and sends the pressure data result to the first controller 9. The first controller 9 sends the pressure data result to the third controller 404. The third controller 404 controls the third driving member 402 to adjust the second clamping space 409 between the two pressing plates 408.

[0082] It should be noted that the third sensor 405 can be a pressure sensor, the third controller 404 can be a servo controller, the third driving member 402 can be a servo motor, the second transmission member 407 can be a screw rod, and the second connecting member 406 can be a supporting structure with a slider; or the second transmission member 407 can be a conveyor belt, and the second connecting member 406 can be a support frame fixed on the conveyor belt.

[0083] Alternatively, if Figure 8 As shown, the pole piece pre-bending device also includes a third fixed seat 501, a fourth driving member 502 and two clamping roller assemblies 503; the third fixed seat 501 is arranged on the side of the clamping mechanism 4 close to the conveying mechanism 1, and the two clamping roller assemblies 503 are respectively movably connected to the third fixed seat 501, and a third clamping space 504 is formed between the two clamping roller assemblies 503; the propulsion mechanism 2 is used to push the pole piece 5 through the third clamping space 504 and the clamping mechanism 4 to a preset position; the fourth driving member 502 is respectively connected to the two clamping roller assemblies 503, and is used to drive the two clamping roller assemblies 503 to move relative to each other, so as to adjust the size of the third clamping space 504, and to assist in clamping the pole piece 5 through the third clamping space 504.

[0084] In the embodiment of the present application, the third fixing seat 501 is arranged on the side of the clamping plate mechanism 4 close to the conveying mechanism 1, the pushing mechanism 2 pushes the pole piece 5 through the third clamping space 504 and the clamping plate mechanism 4 to the preset position, the fourth driving member 502 is respectively connected to the two clamping roller assemblies 503, the two clamping roller assemblies 503 are respectively movably connected to the third fixing seat 501, and a third clamping space 504 is formed between the two clamping roller assemblies 503. In this way, after the suction mechanism 3 adsorbs and fixes the pole piece 5, the pole piece 5 is located between the third clamping space 504 formed by the two clamping roller assemblies 503, and the clamping roller assemblies 503 move relatively from both sides of the pole piece 5 to gather and fix the pole piece 5 from both sides to the middle to assist in clamping the pole piece 5.

[0085] In some embodiments, the pole piece pre-bending device also includes a fourth controller 508, the output end of the fourth controller 508 is connected to the fourth driving member 502, and the input end is connected to the first controller 9. The fourth controller 508 controls the fourth driving member 502 according to the control instructions of the first controller 9, and then controls the third clamping space 504 formed between the clamping roller assemblies 503.

[0086] It should be noted that the fourth driving member 502 may be a servo motor, and the fourth controller 508 may be a servo controller.

[0087] Optionally, the clamping roller assembly 503 includes: a third transmission member 505, a third connecting member 506 and a clamping roller 507; the third transmission member 505 is movably connected to the third fixed seat 501, the third connecting member 506 is slidably connected to the third transmission member 505, and the clamping roller 507 is fixedly connected to the third connecting member 506; the fourth driving member 502 is connected to the third transmission member 505, and is used to drive the third transmission member 505 to move, and drive the third connecting member 506 and the clamping roller 507 to move through the third transmission member 505.

[0088] In the embodiment of the present application, the clamping roller assembly 503 includes: a third transmission member 505, a third connecting member 506 and a clamping roller 507, wherein the third transmission member 505 is movably connected to the third fixed seat 501, the third connecting member 506 is slidably connected to the third transmission member 505, and the clamping roller 507 is fixedly connected to the third connecting member 506; the fifth driving member 108 is connected to the third transmission member 505. In this way, when the fourth driving member 502 drives the third transmission member 505 to move, the third connecting member 506 and the clamping roller 507 can be driven to move by the third transmission member 505, and then the pole piece 5 can be gathered and fixed by the clamping roller 507 to assist in clamping the pole piece 5.

[0089] It should be noted that the third transmission member 505 may be a screw rod, and the third connecting member 506 may be a belt slider; or the third transmission member 505 may be a conveyor belt, and the third connecting member 506 may be a support frame fixed on the conveyor belt.

[0090] Alternatively, if Figures 9 and 10 As shown, the pole piece pre-bending device also includes two dust removal components 101 and a second negative pressure mechanism 102; the dust removal component 101 is arranged at the downward workstation of the clamping mechanism 4, and the two dust removal components 101 are arranged opposite to each other. The conveying mechanism 1 is also used to transfer the pre-bent pole piece 5 to between the two dust removal components 101; the second negative pressure mechanism 102 is respectively connected to the two dust removal components 101, and the second negative pressure mechanism 102 is used to provide negative pressure to the dust removal component 101, so that the dust removal component 101 absorbs the powder on the surface of the pole piece 5.

[0091] In the embodiment of the present application, the dust removal assembly 101 is arranged at the lower station of the clamping mechanism 4, the two dust removal assemblies 101 are arranged opposite to each other, and the conveying mechanism 1 transfers the pre-bent pole piece 5 to between the two dust removal assemblies 101; the second negative pressure mechanism 102 is respectively connected to the two dust removal assemblies 101, and the second negative pressure mechanism 102 provides negative pressure to the dust removal assembly 101. In this way, the powder on the surface of the bent pole piece 5 is brushed off by the dust removal assembly 101, and then the powder on the surface of the pole piece 5 is sucked off, thereby improving the surface cleanliness of the pole piece 5.

[0092] Alternatively, if Figures 9 and 10As shown, the dust removal component 101 includes a rotating brush 103, a second suction piece 104 and a second connecting pipe 105; the second suction piece 104 is arranged at the downward workstation of the clamping mechanism 4, one end of the second connecting pipe 105 is connected to the second suction piece 104, and the second negative pressure mechanism 102 is connected to the other end of the second connecting pipe 105; the second suction piece 104 is provided with a second suction port 109, the rotating brush 103 is arranged at the second suction port 109, the rotating brush 103 can rotate relative to the second suction piece 104 to brush off the powder on the surface of the electrode 5, and the second negative pressure mechanism 102 is used to provide negative pressure to the second suction piece 104, so that the second suction piece 104 absorbs the powder on the surface of the electrode 5.

[0093] In the embodiment of the present application, the dust removal assembly 101 includes a rotating brush 103, a second suction member 104 and a second connecting pipe 105. The second suction member 104 is arranged at the downward station of the clamping plate mechanism 4, one end of the second connecting pipe 105 is connected to the second suction member 104, the second negative pressure mechanism 102 is connected to the other end of the second connecting pipe 105, the second suction member 104 is provided with a second suction port 109, and the rotating brush 103 is arranged at the second suction port 109. The present application arranges a rotating brush 103 at the second suction port 109, and the rotating brush 103 rotates to brush off the powder on the surface of the pole piece 5 passing through the second suction port 109, thereby ensuring that the surface of the pole piece 5 is clean; at the same time, the second negative pressure mechanism 102 sucks off the powder on the surface of the pole piece 5, thereby preventing the dust on the pole piece 5 from falling back onto the surface of the pole piece 5 after being brushed out by the rotating brush 103, thereby preventing secondary pollution.

[0094] In some embodiments, a second air volume adjusting member 107 is further provided at one end of the second connecting tube 105 close to the second material suction member 104 , so that the air volume in the second connecting tube 105 can be adjusted according to the second air volume adjusting member 107 .

[0095] In some embodiments, the pole piece pre-bending device further includes a fourth sensor 106, which is electrically connected to the first controller 9, and is disposed between the second air volume adjustment member 107 and the second connecting pipe 105. The fourth sensor 106 is used to monitor the pressure value in the second connecting pipe 105 and send the pressure value to the first controller 9. The first controller 9 dynamically adjusts the size of the second air volume adjustment member 107 according to the pressure value monitored by the fourth sensor 106 to ensure that the negative pressure flow rate in the second connecting member 406 is maintained within a certain range.

[0096] It should be noted that the second air volume adjustment member 107 may be a pneumatic valve or an electric valve with a feedback signal, and the fourth sensor 106 may be a negative pressure sensor, which is not limited in the present application.

[0097] In some embodiments, the pole piece pre-bending device further includes a fifth driving member 108, which is connected to the rotating brush 103 and is used to control the rotation speed of the rotating brush 103; the fifth driving member 108 can be a servo motor or a cylinder, etc.

[0098] In the description of this specification, 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 application. 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.

[0099] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pole piece pre-bending device, characterized in that: include: A conveying mechanism (1), a propulsion mechanism (2), a material suction mechanism (3) and a clamping mechanism (4); The conveying mechanism (1) is used to convey the pole piece (5); along a conveying direction perpendicular to the pole piece (5), the propulsion mechanism (2) and the clamping mechanism (4) are respectively arranged on both sides of the conveying mechanism (1); The propulsion mechanism (2) is used to push the pole piece (5) through the clamping mechanism (4) to a preset position; the suction mechanism (3) is arranged at the preset position, and the suction mechanism (3) is used to absorb and fix the pole piece (5), and to clamp the pole piece (5) through the clamping mechanism (4) so ​​that the pole piece (5) is pre-bent.

2. The pole piece pre-bending device according to claim 1, characterized in that: The pole piece pre-bending device also includes an identification mechanism (6) and a first controller (9); The pole piece (5) is preset with an identification mark (8); the identification mechanism (6) is arranged on a side of the transmission mechanism (1) close to the propulsion mechanism (2) for identifying the identification mark (8); the first controller (9) is electrically connected to the identification mechanism (6) and the propulsion mechanism (2) respectively, and is used to control the operation of the propulsion mechanism (2) based on the identification result of the identification mechanism (6).

3. The pole piece pre-bending device according to claim 1, characterized in that: The material suction mechanism (3) comprises a first material suction member (301), a first connecting pipe (302) and a first negative pressure mechanism (303); The first material suction member (301) is arranged at the preset position, one end of the first connecting tube (302) is connected to the first material suction member (301), and the first negative pressure mechanism (303) is connected to the other end of the first connecting tube (302); The first negative pressure mechanism (303) is used to provide negative pressure to the first material suction member (301), so that the first material suction member (301) absorbs and fixes the pole piece (5) and absorbs powder generated by bending the pole piece (5).

4. The pole piece pre-bending device according to claim 3, characterized in that: The material suction mechanism (3) further comprises a first air volume adjustment member (304); The first air volume adjusting member (304) is arranged at one end of the first connecting pipe (302) close to the first material suction member (301), and the first air volume adjusting member (304) is used to adjust the suction force of the first material suction member (301).

5. The pole piece pre-bending device according to claim 4, characterized in that: The material suction mechanism (3) further comprises two clamping assemblies (308); A first suction port (309) is provided on the side of the first suction member (301) facing the clamping mechanism (4); the two clamping components (308) are both provided at the first suction port (309); a first clamping space (310) is formed between the two clamping components (308); the two clamping components (308) can move relative to each other to adjust the size of the first clamping space (310), and the pole piece (5) is auxiliary clamped through the first clamping space (310).

6. The pole piece pre-bending device according to claim 5, characterized in that: The clamping assembly (308) comprises a first clamping member (311) and a first driving member (312); The first driving member (312) is installed at the first suction port (309), and the first clamping member (311) is connected to the first driving member (312); the first driving member (312) is used to drive the first clamping member (311) to move so as to adjust the size of the first clamping space (310).

7. The pole piece pre-bending device according to claim 1, characterized in that: The propulsion mechanism (2) comprises a first fixed seat (201), a second driving member (206), a first transmission structure (203) and a first pushing roller (202); The first fixed seat (201) is arranged on one side of the transmission mechanism (1) perpendicular to the transmission direction of the pole piece (5); the first transmission structure (203) is movably connected to the first fixed seat (201); the first push roller (202) is connected to the first transmission structure (203); the second driving member (206) is connected to the first transmission structure (203) and is used to drive the first transmission structure (203) to move, and drives the first push roller (202) to move through the first transmission structure (203) to push the pole piece (5) to the preset position.

8. The pole piece pre-bending device according to claim 1, characterized in that: The clamping plate mechanism (4) comprises a second fixing seat (401), a third driving member (402) and two clamping plate assemblies (403); The second fixed seat (401) is arranged on the other side of the transmission mechanism (1) along a transmission direction perpendicular to the pole piece (5), and the two clamping plate assemblies (403) are respectively movably connected to the second fixed seat (401), and a second clamping space (409) is formed between the two clamping plate assemblies (403). The propulsion mechanism (2) pushes the pole piece (5) through the second clamping space (409) to the preset position; the third driving member (402) is respectively connected to the two clamping plate assemblies (403) and is used to drive the two clamping plate assemblies (403) to move relative to each other so as to adjust the size of the second clamping space (409), and clamp the pole piece (5) through the second clamping space (409) so as to pre-bend the pole piece (5).

9. The pole piece pre-bending device according to claim 8, characterized in that: The clamping plate assembly (403) comprises: a second transmission member (407), a second connecting member (406) and a pressing plate (408); The second transmission member (407) is movably connected to the second fixed seat (401), the second connecting member (406) is slidably connected to the second transmission member (407), and the pressure plate (408) is fixedly connected to the second connecting member (406); the third driving member (402) is connected to the second transmission member (407) and is used to drive the second transmission member (407) to move, and drive the second connecting member (406) and the pressure plate (408) to move through the second transmission member (407).

10. The pole piece pre-bending device according to claim 1, characterized in that: The pole piece pre-bending device also includes a third fixing seat (501), a fourth driving member (502) and two clamping roller assemblies (503); The third fixed seat (501) is arranged on a side of the clamping plate mechanism (4) close to the conveying mechanism (1); the two clamping roller assemblies (503) are respectively movably connected to the third fixed seat (501); a third clamping space (504) is formed between the two clamping roller assemblies (503); the propulsion mechanism (2) is used to push the pole piece (5) through the third clamping space (504) and the clamping plate mechanism (4) to a preset position; the fourth driving member (502) is respectively connected to the two clamping roller assemblies (503) and is used to drive the two clamping roller assemblies (503) to move relative to each other, so as to adjust the size of the third clamping space (504) and to assist in clamping the pole piece (5) through the third clamping space (504).

11. The pole piece pre-bending device according to claim 10, characterized in that: The clamping roller assembly (503) comprises: a third transmission member (505), a third connecting member (506) and a clamping roller (507); The third transmission member (505) is movably connected to the third fixed seat (501), the third connecting member (506) is slidably connected to the third transmission member (505), and the clamping roller (507) is fixedly connected to the third connecting member (506); the fourth driving member (502) is connected to the third transmission member (505) and is used to drive the third transmission member (505) to move, and drives the third connecting member (506) and the clamping roller (507) to move through the third transmission member (505).

12. The pole piece pre-bending device according to claim 1, characterized in that: The pole piece pre-bending device further comprises two dust removal assemblies (101) and a second negative pressure mechanism (102); the dust removal assembly (101) is arranged at a downward working position of the clamping plate mechanism (4), the two dust removal assemblies (101) are arranged opposite to each other, and the conveying mechanism (1) is also used for conveying the pre-bent pole piece (5) to between the two dust removal assemblies (101); The second negative pressure mechanism (102) is connected to the two dust removal components (101) respectively, and the second negative pressure mechanism (102) is used to provide negative pressure to the dust removal component (101) so that the dust removal component (101) absorbs the powder on the surface of the pole piece (5).

13. The pole piece pre-bending device according to claim 12, characterized in that: The dust removal component (101) comprises a rotating brush (103), a second material suction member (104) and a second connecting pipe (105); The second suction member (104) is arranged at the downward working position of the clamping mechanism (4), one end of the second connecting tube (105) is connected to the second suction member (104), and the second negative pressure mechanism (102) is connected to the other end of the second connecting tube (105); the second suction member (104) is provided with a second suction port (109), the rotating brush (103) is arranged at the second suction port (109), the rotating brush (103) can rotate relative to the second suction member (104) to brush off the powder on the surface of the pole piece (5), and the second negative pressure mechanism (102) is used to provide negative pressure to the second suction member (104) so ​​that the second suction member (104) can absorb the powder on the surface of the pole piece (5).

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