A rapid pole piece laminating mechanism

Abstract

The present invention relates to the technical field of battery cell production, and particularly to a rapid pole piece stacking mechanism, which includes a pre-positioning and alignment mechanism, a pole piece conveying manipulator, a stacking device, and a separator conveying device. The external pole pieces include a positive pole piece and a negative pole piece. The number of the pole piece conveying manipulator and the pre-positioning and alignment mechanism is two. The stacking device includes a moving stacking table and a fixture. The moving stacking table of the present invention reciprocates with the separator conveying device as the central axis by pressing the external separator tape conveyed by the separator conveying device with the fixture to the pre-positioning and alignment mechanisms that are positioned and aligned with the positive pole piece and the negative pole piece, so that the external separator tape forms a separator layer. Each pole piece conveying manipulator separately conveys the positive pole piece and the negative pole piece positioned and aligned by each pre-positioning and alignment mechanism to the separator layer of the moving stacking table at intervals, so that the positive pole piece, the negative pole piece, and the external separator tape are stacked layer by layer in the order of separator, positive pole piece, separator, and negative pole piece to form a battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell production, and particularly to a rapid electrode sheet stacking mechanism. Background Art

[0002] A battery cell refers to an electrochemical cell containing a positive electrode sheet and a negative electrode sheet. The positive electrode sheet and the negative electrode sheet are separated by a separator to prevent contact between the positive electrode sheet and the negative electrode sheet from causing a short circuit, and to allow ions in the electrolyte to pass through.

[0003] The winding process and the stacking process are the core links in the middle section of battery production. Compared with winding, the stacking process can better improve battery performance and has advantages in aspects such as energy density, safety, and cycle life.

[0004] In the stacking process, the positive electrode sheet and the negative electrode sheet need to be die-cut and then stacked layer by layer in the order of the positive electrode sheet, the separator, and the negative electrode sheet to form a battery cell. After die-cutting, the positive electrode sheet and the negative electrode sheet are conveyed by a feeding conveyor belt, and the positions of the positive electrode sheet and the negative electrode sheet may shift, which is not convenient for the positive electrode sheet, the separator, and the negative electrode sheet to be stacked layer by layer in sequence, affecting the forming efficiency of the battery cell. Summary of the Invention

[0005] The purpose of the present invention is to provide a rapid electrode sheet stacking mechanism in view of the deficiency that the positions of the die-cut positive electrode sheet and negative electrode sheet shift in the prior art. The separator conveying device conveys an external separator tape to the moving stacking table. The moving stacking table reciprocates between the pre-positioning and aligning mechanisms for correctly placing the positive electrode sheet and the negative electrode sheet. The moving stacking table moves the external separator tape to the pre-positioning and aligning mechanism for correctly placing the positive electrode sheet held by it through the clamp, and the external separator tape forms a first separator layer. The electrode sheet conveying manipulator transports the positive electrode sheet onto the first separator layer. The moving stacking table moves the separator tape and the positive electrode sheet to the pre-positioning and aligning mechanism for correctly placing the negative electrode sheet held by it through the clamp, and the external separator tape forms a second separator layer. The electrode sheet conveying manipulator transports the negative electrode sheet onto the second separator layer, so that the positive electrode sheet, the negative electrode sheet, and the external separator tape are stacked layer by layer in the order of separator, positive electrode sheet, separator, and negative electrode sheet to form a battery cell.

[0006] To achieve the above object, a rapid electrode sheet stacking mechanism of the present invention includes a pre-positioning and aligning mechanism, an electrode sheet conveying manipulator, a stacking device, and a separator conveying device. The pre-positioning and aligning mechanism is used to correctly place and hold an external electrode sheet. The electrode sheet conveying manipulator is arranged between the pre-positioning and aligning mechanism and the stacking device. The separator conveying device is used to convey an external separator tape to the stacking device.

[0007] The number of both the electrode sheet conveying manipulator and the pre-positioning and aligning mechanism is two.

[0008] The laminating device includes a movable laminating table and a clamp arranged on the movable laminating table for pressing materials. The diaphragm conveying device conveys an external diaphragm tape to the movable laminating table. The movable laminating table reciprocates between pre-positioning and aligning mechanisms for correctly placing the positive electrode plate and the negative electrode plate. The movable laminating table presses the external diaphragm tape through the clamp and moves it to the pre-positioning and aligning mechanism for correctly placing the positive electrode plate. The external diaphragm tape forms a first diaphragm layer. The electrode conveying manipulator transports the positive electrode plate onto the first diaphragm layer. The movable laminating table presses the diaphragm tape and the positive electrode plate through the clamp and moves it to the pre-positioning and aligning mechanism for correctly placing the negative electrode plate. The external diaphragm tape forms a second diaphragm layer. The electrode conveying manipulator transports the negative electrode plate onto the second diaphragm layer, so that the positive electrode plate, the negative electrode plate and the external diaphragm tape are laminated together layer by layer in the order of diaphragm, positive electrode plate, diaphragm and negative electrode plate to form a battery cell.

[0009] Preferably, the movable laminating table includes a laminating base, a laminating table and a laminating driver. The laminating table is slidably connected to the laminating base, and the laminating driver is used to drive the laminating table to move horizontally along the laminating base.

[0010] Preferably, the laminating table includes a laminating table body, a laminating negative pressure table and a diaphragm positioning negative pressure plate. The laminating table is slidably connected to the laminating base through the laminating table body. The laminating negative pressure table is fixed on the top of the laminating table body. The diaphragm positioning negative pressure plate is connected to the laminating table body and is arranged on one side of the laminating negative pressure table for adsorbing the end of the external diaphragm tape, so as to facilitate the external diaphragm tape to be laid flat on the laminating negative pressure table, thereby facilitating the clamp to press the external diaphragm tape.

[0011] Preferably, the laminating negative pressure table is provided with a linear relief opening for the external unloading manipulator to insert and clamp the battery cell.

[0012] Preferably, the adsorption holes of the diaphragm positioning negative pressure plate are arranged in a straight line along the longitudinal direction of the diaphragm positioning negative pressure plate and are close to one side of the laminating negative pressure table.

[0013] Preferably, the clamp includes a clamping jaw, a clamping jaw lifting driver and a synchronous driver. One end of the clamping jaw is connected to the clamping jaw lifting driver, and the other end of the clamping jaw is arranged above the laminating table. The clamping jaw lifting driver is used to drive the clamping jaw to lift up and down on the laminating table, and the synchronous driver is used to drive the clamping jaw lifting driver to move away from or close to the laminating table.

[0014] Preferably, the pressing claw includes a pressing block, an S-shaped slope connecting block and a fixed block which are arranged in sequence, the pressing block, the S-shaped slope connecting block and the fixed block are integrally formed, the outer contours of the S-shaped slope connecting block and the pressing block are rounded, the pressing block is arranged above the stacking table, and the fixed block is connected to the pressing claw lifting drive.

[0015] Preferably, the pre-positioning and straightening mechanism includes a visual inspection device, a straightening platform, a negative pressure bearing platform and a handling robot. The handling robot adsorbs the external pole piece on the negative pressure bearing platform through a vacuum suction cup. The negative pressure bearing platform is fixed to the straightening platform and is used to carry the external pole piece. The visual inspection device is arranged above the negative pressure bearing platform and is electrically connected to the straightening platform. The four corners of the vacuum suction cup of the handling robot are provided with avoidance angles for revealing the edge of the external pole piece. A positioning negative pressure area is provided inside the negative pressure bearing platform. The visual inspection device collects the position information of the four sides of the external pole piece on the vacuum suction cup of the handling robot and the four sides of the positioning negative pressure area through the avoidance angle. The straightening platform drives the negative pressure bearing platform to adjust its position according to the position information of the external pole piece.

[0016] Preferably, the visual inspection device includes a detection fixing frame and multiple CCD machine vision system modules for collecting position information of the four sides of the external pole piece and the four sides of the aligned negative pressure area. An adjustment fixing plate is provided at one end of the detection fixing frame, and the adjustment fixing plate is provided directly above the alignment platform. Multiple CCD machine vision system modules are respectively fixed at the four corners of the adjustment fixing plate.

[0017] Preferably, the diaphragm conveying device includes a conveying frame, a diaphragm loading assembly, a vertical conveying roller group and a buffer device. The external diaphragm belt is wound around the diaphragm loading assembly and conveyed to the vertical conveying roller group. The vertical conveying roller group is arranged at the lower part of the conveying frame for vertically conveying the external diaphragm belt to the movable stacking table.

[0018] Advantages of the present invention: The diaphragm conveying device of the present invention conveys an external diaphragm tape to the moving laminating table, which reciprocates between the pre-positioning and aligning mechanisms for correctly positioning and carrying the positive and negative electrode plates. The moving laminating table moves the external diaphragm tape pressed by the fixture to the pre-positioning and aligning mechanism for correctly positioning and carrying the positive electrode plate, and the external diaphragm tape forms a first diaphragm layer. The electrode plate conveying manipulator transports the positive electrode plate onto the first diaphragm layer. The moving laminating table moves the diaphragm tape and the positive electrode plate pressed by the fixture to the pre-positioning and aligning mechanism for correctly positioning and carrying the negative electrode plate, and the external diaphragm tape forms a second diaphragm layer. The electrode plate conveying manipulator transports the negative electrode plate onto the second diaphragm layer, so that the positive electrode plate, the negative electrode plate and the external diaphragm tape are laminated together layer by layer in the order of diaphragm, positive electrode plate, diaphragm and negative electrode plate to form a battery cell core. Description of the Drawings

[0019] Figure 1 It is a top view structural schematic diagram of the present invention.

[0020] Figure 2 It is a front view structural schematic diagram of the pre-positioning and aligning mechanism, the electrode plate conveying manipulator, the laminating device and the diaphragm conveying device of the present invention.

[0021] Figure 3 It is an exploded state structural schematic diagram of the pre-positioning and aligning mechanism of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the electrode plate conveying manipulator, the laminating device and the diaphragm conveying device of the present invention.

[0023] Figure 5 It is an exploded state structural schematic diagram of the laminating table and the fixture of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the laminating negative pressure table and the diaphragm positioning negative pressure plate of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the pressing claw of the present invention.

[0026] Figure 8 It is a structural schematic diagram of the diaphragm conveying device of the present invention.

[0027] Reference numerals include:

[0028] 1. Pre-positioning and aligning mechanism; 11. Visual inspection device; 111. Detection fixing bracket; 112. CCD machine vision system module; 113. Adjusting fixing plate; 114. Adjusting fixing position; 115. Installation sliding seat; 116. Locking groove; 12. Aligning platform; 13. Negative pressure bearing platform; 131. Alignment negative pressure area; 14. Handling manipulator; 141. Vacuum suction cup; 142. Avoidance angle; 2. Electrode sheet conveying manipulator; 3. Laminating device; 31. Moving lamination table; 311. Lamination base; 312. Lamination table; 3121. Lamination table body; 3122. Lamination negative pressure table; 3123. Diaphragm positioning negative pressure plate; 3124. Relief opening; 3125. Suction hole; 3126. Installation position; 313. Lamination driver; 314. Negative pressure table lifting driver; 3141. Connecting piece; 32. Fixture; 321. Pressing claw; 3211. Pressing block; 3212. S-shaped slope connecting block; 3213. Fixed block; 322. Pressing claw lifting driver; 323. Synchronous driver; 4. Diaphragm conveying device; 41. Conveying frame; 42. Unwinding reel; 43. Unwinding driver; 44. Winding reel; 45. Winding driver; 46. Vertical conveying roller group; 461. Vertical frame; 462. Clamping roller group; 463. Electrostatic ion wind rod; 47. Buffer device; 471. Fixed roller; 472. Sliding roller; 473. Steering roller; 474. Buffer driver. Detailed implementation mode

[0029] The present invention will be described in detail below with reference to the accompanying drawings.

[0030] As Figures 1 to 8 shown, a kind of electrode sheet rapid lamination mechanism of the present invention includes a pre-positioning and aligning mechanism 1, an electrode sheet conveying manipulator 2, a lamination device 3 and a diaphragm conveying device 4. The pre-positioning and aligning mechanism 1 is used to align and carry the external electrode sheet, so that the external electrode sheet is aligned and carried on the pre-positioning and aligning mechanism 1, realizing the deviation correction of the position of the external electrode sheet after die cutting.

[0031] The electrode sheet conveying manipulator 2 is arranged between the pre-positioning and aligning mechanism 1 and the lamination device 3. The electrode sheet conveying manipulator 2 is a marble two-axis vacuum suction cup manipulator. The linear expansion coefficient of the electrode sheet conveying manipulator 2 is small through the marble platform, not easy to deform, and has high precision; it is not afraid of acid and alkali liquid erosion, will not rust, does not need to be greased, is not easy to stick with fine dust, and is convenient and simple for maintenance and has a long service life and is easy to maintain; it is not magnetized, moves smoothly, has no stalling feeling, is not affected by humidity, and has good planar stability. The electrode sheet conveying manipulator 2 adsorbs the external electrode sheet through the vacuum suction cup. The electrode sheet conveying manipulator 2 is used to carry the aligned external electrode sheet to the lamination device 3, and the diaphragm conveying device 4 is used to convey the external diaphragm belt to the lamination device 3.

[0032] The external electrode plates include a positive electrode plate and a negative electrode plate. The number of electrode plate conveying manipulators 2 and pre-positioning and aligning mechanisms 1 is two each. The two electrode plate conveying manipulators 2 are used to separately carry the positive electrode plate and the negative electrode plate, and the two pre-positioning and aligning mechanisms 1 are used to respectively align and place the positive electrode plate and the negative electrode plate in place, facilitating the stacking and forming of the battery cell core.

[0033] The laminating device 3 includes a moving laminating table 31 and a fixture 32 provided on the moving laminating table 31 for pressing materials. Specifically, the fixture 32 is arranged on the outer side of the moving laminating table 31 to facilitate the moving laminating table 31 to laminate the positive electrode plate, the negative electrode plate and the external separator. The moving laminating table 31 is a marble laminating table. Due to the marble platform, the moving laminating table 31 has a small linear expansion coefficient, is not easily deformed, and has high precision; it is not afraid of acid and alkali liquid erosion, does not rust, does not need to be greased, is not easily adhered to by fine dust, is convenient and simple for maintenance, has a long service life, and is easy to maintain; it is not magnetized, moves smoothly, has no sense of stasis, is not affected by humidity, and has good planar stability.

[0034] The separator conveying device 4 conveys the external separator tape to the moving laminating table 31. The moving laminating table 31 reciprocates between the respective pre-positioning and aligning mechanisms 1 that are placing the positive electrode plate and the negative electrode plate in place. The moving laminating table 31 moves the external separator tape to the pre-positioning and aligning mechanism 1 that is placing the positive electrode plate in place by pressing with the fixture 32. The external separator tape forms the first separator layer. The electrode plate conveying manipulator 2 transports the positive electrode plate onto the first separator layer. The moving laminating table 31 moves the separator tape and the positive electrode plate to the pre-positioning and aligning mechanism 1 that is placing the negative electrode plate in place by pressing with the fixture 32. The external separator tape forms the second separator layer. The electrode plate conveying manipulator 2 transports the negative electrode plate onto the second separator layer, so that the positive electrode plate, the negative electrode plate and the external separator tape are laminated together layer by layer in the order of separator, positive electrode plate, separator and negative electrode plate to form the battery cell core.

[0035] During operation, the moving lamination table 31 presses the external diaphragm tape conveyed by the diaphragm conveying device 4 through the fixture 32, moves axially with the diaphragm conveying device 4 as the center axis towards the pre-positioning and aligning mechanism 1 for carrying the positive electrode sheet, and covers the external diaphragm tape on the moving lamination table 31 to form the first diaphragm layer. The electrode sheet conveying manipulator 2 transports the aligned positive electrode sheet from the pre-positioning and aligning mechanism 1 to the moving lamination table 31 and presses the positive electrode sheet on the first diaphragm layer. After the fixture 32 releases the external diaphragm tape, it presses the positive electrode sheet and the first diaphragm layer together on the moving lamination table 31, and the electrode sheet conveying manipulator 2 for transporting the positive electrode sheet withdraws; the moving lamination table 31 moves again with the diaphragm conveying device 4 as the center axis towards the pre-positioning and aligning mechanism 1 for carrying the negative electrode sheet, covers the external diaphragm tape on the positive electrode sheet to form the second diaphragm layer, the electrode sheet conveying manipulator 2 transports the aligned negative electrode sheet from the pre-positioning and aligning mechanism 1 to the moving lamination table 31 and presses the negative electrode sheet on the second diaphragm layer. After the fixture 32 releases the positive electrode sheet placed on the first diaphragm layer, it presses the negative electrode sheet and the second diaphragm layer together on the moving lamination table 31, and the electrode sheet conveying manipulator 2 for transporting the negative electrode sheet withdraws. Repeat this process to stack the positive electrode sheet, negative electrode sheet, and external diaphragm tape layer by layer in the order of diaphragm, positive electrode sheet, diaphragm, and negative electrode sheet to form a battery cell core.

[0036] The moving lamination table 31 of this embodiment includes a lamination base 311, a lamination table 312, and a lamination driver 313. Both the lamination base 311 and the lamination table 312 are made of marble material, making the accuracy of the lamination base 311 and the lamination table 312 high and easy to maintain. The lamination driver 313 is a linear cylinder module. The lamination table 312 is slidably connected to the lamination base 311, and the lamination driver 313 is used to drive the lamination table 312 to move horizontally along the lamination base 311, so as to realize the reciprocating movement of the moving lamination table 31 with the diaphragm conveying device 4 as the center axis towards the pre-positioning and aligning mechanisms 1 for carrying the positive electrode sheet and the negative electrode sheet respectively.

[0037] The fixture 32 includes a clamping jaw 321, a clamping jaw lifting driver 322, and a synchronization driver 323. The clamping jaw lifting driver 322 is a linear cylinder, and the synchronization driver 323 is a ball screw slide table module.

[0038] One end of the clamping jaw 321 is connected to the clamping jaw lifting driver 322, and the other end of the clamping jaw 321 is arranged above the lamination table 312. The clamping jaw lifting driver 322 is used to drive the clamping jaw 321 to move up and down relative to the lamination table 312, and the synchronization driver 323 is used to drive the clamping jaw lifting driver 322 to move away from or close to the lamination table 312.

[0039] During operation, the synchronization driver 323 drives the jaw lifting driver 322 to approach the lamination table 312. The jaw lifting driver 322 synchronously drives the jaws 321 to descend and rest on the lamination table 312, so that the jaws 321 press the external pole piece and / or the external separator tape against the lamination table 312. The synchronization driver 323 drives the jaw lifting driver 322 away from the lamination table 312, and the jaw lifting driver 322 synchronously drives the jaws 321 to rise, so that the jaws 321 release the external pole piece and / or the external separator tape.

[0040] In actual use, the number of the jaws 321 is four, the number of the jaw lifting drivers 322 is the same as that of the jaws 321, the synchronization driver 323 is a positive and negative thread ball screw slide module, and the number of the synchronization drivers 323 is two. Two jaws 321 and two jaw lifting drivers 322 form a group, and are respectively fixed at both ends of the synchronization driver 323 to form a positive electrode clamp and a negative electrode clamp. The positive electrode clamp is arranged on the left side of one side of the moving lamination table 31 close to the pre-positioning and aligning mechanism 1 for aligning and carrying the positive electrode sheet, and the negative electrode clamp is arranged on one side of the moving lamination table 31 close to the pre-positioning and aligning mechanism 1 for aligning and carrying the negative electrode sheet. The moving lamination table 31 presses the external separator tape conveyed by the separator conveying device 4 through the positive electrode clamp and the negative electrode clamp and moves axially with the separator conveying device 4 as the center towards the direction close to the pre-positioning and aligning mechanism 1 for aligning and carrying the positive electrode sheet, so that the external separator tape covers the moving lamination table 31 to form a first separator layer. When the pole piece conveying manipulator 2 for carrying the positive electrode sheet conveys the aligned positive electrode sheet from the pre-positioning and aligning mechanism 1 to the moving lamination table 31 and presses the positive electrode sheet against the first separator layer, after the negative electrode clamp releases the external separator tape, it presses the positive electrode sheet and the first separator layer together against the moving lamination table 31; when the pole piece conveying manipulator 2 for carrying the negative electrode sheet conveys the aligned negative electrode sheet from the pre-positioning and aligning mechanism 1 to the moving lamination table 31 and presses the negative electrode sheet against the second separator layer, after the positive electrode clamp releases the external separator tape, it presses the negative electrode sheet and the second separator layer together against the moving lamination table 31. The positive electrode clamp and the negative electrode clamp work independently respectively, and cross-press or release the external pole piece and / or the external separator tape against the lamination table 312, ensuring that at least one set of clamps presses the external pole piece and / or the external separator tape against the lamination table 312, so that the battery cell is fixed on the moving lamination table 31.

[0041] The lamination platform 312 of this embodiment includes a lamination platform body 3121, a lamination negative pressure platform 3122, and a diaphragm positioning negative pressure plate 3123. The lamination platform 312 is slidably connected to the lamination base 311 through the lamination platform body 3121, and the lamination driver 313 is transmission-connected to the lamination platform body 3121, so that the lamination driver 313 is used to drive the lamination platform 312 to move horizontally along the lamination base 311. The lamination negative pressure platform 3122 is fixed to the top of the lamination platform body 3121, and the diaphragm positioning negative pressure plate 3123 is connected to the lamination platform body 3121 and is arranged on one side of the lamination negative pressure platform 3122 for adsorbing the end of the external diaphragm belt, so that the external diaphragm belt is laid flat on the lamination negative pressure platform 3122, thereby facilitating the pressing claw 321 to press the external diaphragm belt against the lamination platform 312.

[0042] The lamination negative pressure platform 3122 of this embodiment is provided with a straight-line opening 3124 for an external unloading robot to insert and clamp the battery cell, so that the external unloading robot can more conveniently remove the formed battery cell from the lamination negative pressure platform 3122 .

[0043] The adsorption holes 3125 of the diaphragm positioning negative pressure plate 3123 of this embodiment are arranged in a straight line along the longitudinal direction of the diaphragm positioning negative pressure plate 3123 and close to one side of the stacking negative pressure platform 3122. When the movable stacking platform 31 moves toward one side of the diaphragm positioning negative pressure plate 3123, the adsorption holes 3125 of the diaphragm positioning negative pressure plate 3123 adsorb one end of the external diaphragm belt, and the free end of the external diaphragm belt slides along the edge of the diaphragm positioning negative pressure plate 3123 with a certain arc, so that the external diaphragm belt is flatly laid on the stacking negative pressure platform 3122, which is convenient for the stacking negative pressure platform 3122 to adsorb the external diaphragm belt and reduce wrinkles, and it is convenient for the clamp 32 to press the external diaphragm belt on the stacking platform 312.

[0044] The stacking table body 3121 of this embodiment is also provided with a negative pressure table lifting driver 314, which is a linear cylinder. The negative pressure table lifting driver 314 is used to drive the stacking negative pressure table 3122 to rise and fall. As the positive electrode sheets, diaphragms and negative electrode sheets are stacked layer by layer to form battery cells, the thickness of the battery cells is increased. The negative pressure table lifting driver 314 is used to drive the stacking negative pressure table 3122 to gradually descend, so that the stacking negative pressure table 3122 remains at the same horizontal height, which is convenient for the electrode conveying robot 2 to transport the straightened external electrode sheets to the stacking device 3.

[0045] An installation position 3126 is provided at the bottom of the laminated negative pressure table 3122. The negative pressure table lifting driver 314 is provided with a connecting member 3141. The shape of the connecting member 3141 matches that of the installation position 3126. The connecting member 3141 is inserted into the installation position 3126 and fixedly connected to the laminated negative pressure table 3122, making the connection between the laminated negative pressure table 3122 and the negative pressure table lifting driver 314 more convenient and improving the assembly efficiency of the lamination mechanism.

[0046] The pressing jaw 321 of this embodiment includes a pressing block 3211, an S-shaped ramp connecting block 3212, and a fixing block 3213 arranged in sequence. The pressing block 3211, the S-shaped ramp connecting block 3212, and the fixing block 3213 are integrally formed. The outer contours of the S-shaped ramp connecting block 3212 and the pressing block 3211 are both rounded. The pressing block 3211 is arranged above the lamination table 312. The fixing block 3213 is connected to the pressing jaw lifting driver 322. The thickness of the pressing block 3211 is less than that of the fixing block 3213, which is convenient for the pressing jaw 321 to release the external pole piece and / or the external diaphragm tape, and avoids scratching the external pole piece and / or the external diaphragm tape by the pressing jaw 321.

[0047] The pre-positioning and alignment mechanism 1 of this embodiment includes a vision detection device 11, an alignment platform 12, a negative pressure bearing platform 13, and a handling manipulator 14. The handling manipulator 14 is a marble two-axis vacuum suction cup manipulator. Through the marble platform, the linear expansion coefficient of the handling manipulator 14 is small, it is not easy to deform, and the accuracy is high; it is not afraid of acid and alkali liquid erosion, will not rust, does not need to be greased, is not easy to stick with fine dust, and is convenient and simple for maintenance and has a long service life and is easy to maintain; it is not magnetized, moves smoothly, has no sense of stagnation, is not affected by humidity, and has good planar stability. The handling manipulator 14 adsorbs the external pole piece on the external feeding conveyor belt through the vacuum suction cup and places it on the negative pressure bearing platform 13.

[0048] The negative pressure bearing platform 13 is fixed to the alignment platform 12 and is used to bear the external pole piece. The alignment platform 12 is a UVW alignment platform. The UVW alignment platform is also called XXY and XYR alignment platforms, which belong to a three-axis parallel motion mechanism. Through the parallel motion of 3 linear moving axes, the XY two-axis linear motion and the Oz-axis rotation motion are realized, which is convenient for the alignment platform 12 to adjust the position of the negative pressure bearing platform 13 so that the positive or negative pole piece is aligned and borne on the negative pressure bearing platform 13. The vision detection device 11 is arranged above the negative pressure bearing platform 13 and is electrically connected to the alignment platform 12, which is convenient for the vision detection device 11 to transmit data to the alignment platform 12.

[0049] Avoidance corners 142 for exposing the edges of the external pole piece are provided at the four corners of the vacuum suction cup 141 of the handling manipulator 14. Through the avoidance corners 142, the edges of the external pole piece are exposed, which is convenient for the vision detection device 11 to collect the position information between the edge of the external pole piece and the edge of the negative pressure bearing platform 13.

[0050] Inside the negative pressure carrier 13, there is a alignment negative pressure area 131. When the external pole piece adsorbed by the handling manipulator 14 is transported above the negative pressure carrier 13, the vision detection device 11 collects the position information of the four sides of the external pole piece on the vacuum chuck 141 of the handling manipulator 14 and the four sides of the alignment negative pressure area 131 in real time through the avoidance angle 142. The alignment platform 12 drives the negative pressure carrier 13 to adjust its position according to the position information of the external pole piece, so that the four sides of the alignment negative pressure area 131 are aligned with the four sides of the external pole piece on the vacuum chuck 141 of the handling manipulator 14. Then the handling manipulator 14 places the external pole piece on the negative pressure carrier 13, enabling the positive or negative pole piece to be correctly placed and carried on the negative pressure carrier 13, thereby realizing that the pre - alignment mechanism 1 correctly places and carries the external pole piece, facilitating the sequential lamination of the positive pole piece, separator, and negative pole piece layer by layer, and being beneficial to improving the forming efficiency of the battery cell.

[0051] The vision detection device 11 of this embodiment includes a detection fixing frame 111 and a plurality of CCD machine vision system modules 112 for collecting the position information of the four sides of the external pole piece and the four sides of the alignment negative pressure area 131. One end of the detection fixing frame 111 is provided with an adjustment fixing plate member 113. The adjustment fixing plate member 113 is arranged directly above the alignment platform 12. The plurality of CCD machine vision system modules 112 are respectively fixed at the four corners of the adjustment fixing plate member 113, so that the CCD machine vision system modules 112 are fixed to the detection fixing frame 111. Specifically, the adjustment fixing plate member 113 is provided with a plurality of adjustment fixing positions 114. The CCD machine vision system module 112 is provided with a mounting slide 115 slidably connected to the adjustment fixing plate member 113. The mounting slide 115 is provided with a locking groove 116 corresponding to the adjustment fixing position 114. The locking groove 116 and the adjustment fixing position 114 are connected by an external fixing member. The fixing member can be a pin or a bolt, so that the plurality of CCD machine vision system modules 112 are respectively fixed at the four corners of the adjustment fixing plate member 113, facilitating the adjustment of the connection position between the CCD machine vision system module 112 and the detection fixing frame 111.

[0052] The separator conveying device 4 of this embodiment includes a conveying frame 41, a separator loading component, a vertical conveying roller group 46, and a buffer device 47. The unwinding shaft 42 is used to fix the circular external separator tape. The external separator tape is wound around the separator loading component and then conveyed to the vertical conveying roller group 46.

[0053] The diaphragm feeding component includes a unwind reel 42, an unwind drive 43, a winding reel 44, and a winding drive 45. Both the unwind drive 43 and the winding drive 45 are reduction motors. The unwind reel 42 is used to fix the external diaphragm coil. The unwind drive 43 is fixed to the conveying frame 41 and drives the unwind reel 42 to rotate. The external diaphragm belt is wound around the winding reel 44. The winding drive 45 is fixed to the conveying frame 41 and drives the winding reel 44 to rotate, so that the external diaphragm belt wound around the winding reel 44 is conveyed to the vertical conveying roller group 46, thereby realizing the conveyance of the external diaphragm belt to the vertical conveying roller group 46 after being wound around the diaphragm feeding component.

[0054] The vertical conveying roller group 46 is arranged at the lower part of the conveying frame 41 for vertically conveying the external diaphragm belt to the moving lamination table 31, facilitating the moving lamination table 31 to press the external diaphragm belt conveyed by the diaphragm conveying device 4 with the clamp 32 and reciprocate towards the pre-positioning and aligning mechanism 1 for aligning and carrying the positive and negative electrode plates respectively with the diaphragm conveying device 4 as the axis.

[0055] The vertical conveying roller group 46 includes a vertical frame 461. Clamping roller groups 462 are arranged at both ends of the vertical frame 461, and the external diaphragm belt is conveyed along the vertical frame 461 through the clamping roller groups 462. An electrostatic ion blower 463 for removing static electricity is arranged between the two clamping roller groups 462. A large number of air masses with positive and negative charges are generated by the electrostatic ion blower 463. When the external diaphragm belt passes through the radiation area of the air masses with positive and negative charges, the static electricity carried by the external diaphragm belt is neutralized by the air masses with positive and negative charges, achieving the effect of removing the static electricity of the external diaphragm belt.

[0056] The buffer device 47 includes a fixed roller 471, a sliding roller 472, a turning roller 473, and a buffer drive 474. The fixed roller 471 and the turning roller 473 are rotatably arranged on the conveying frame 41, the sliding roller 472 slides on the conveying frame 41, and the buffer drive 474 drives the sliding roller 472 to slide close to or away from the fixed roller 471;

[0057] The external diaphragm belt conveyed by the winding reel 44 is sequentially wound around the fixed roller 471, the sliding roller 472, and the turning roller 473 and conveyed to the vertical conveying roller group 46. The buffer drive 474 is a servo motor. The buffer drive 474 drives the sliding roller 472 to slide away from the fixed roller 471 to realize buffering and length determination of the external diaphragm belt.

[0058] The buffer drive 474 drives the sliding roller 472 to slide close to the fixed roller 471, so that the fixed-length external diaphragm belt is conveyed to the vertical conveying roller group 46, enabling the external diaphragm belt to be conveyed within a fixed tension range, realizing stable conveyance of the external diaphragm belt, and preventing frequent changes in the tension of the external diaphragm belt.

[0059] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A rapid laminating mechanism for a pole piece, characterized in that: It includes a pre-positioning and aligning mechanism (1), a pole piece conveying manipulator (2), a laminating device (3) and a separator conveying device (4). The pre-positioning and aligning mechanism (1) is used to align the external pole pieces. The pole piece conveying manipulator (2) is arranged between the pre-positioning and aligning mechanism (1) and the laminating device (3). The separator conveying device (4) is used to convey the external separator tape to the laminating device (3). The number of the pole piece conveying manipulator (2) and the pre-positioning and aligning mechanism (1) is two each; The laminating device (3) includes a moving laminating table (31) and a fixture (32) arranged on the moving laminating table (31) for pressing materials. The separator conveying device (4) conveys the external separator tape to the moving laminating table (31). The moving laminating table (31) reciprocates between the pre-positioning and aligning mechanisms (1) for aligning and carrying the positive and negative pole pieces. The moving laminating table (31) moves the external separator tape to the pre-positioning and aligning mechanism (1) for aligning and carrying the positive pole piece by means of the fixture (32), and the external separator tape forms a first separator layer. The pole piece conveying manipulator (2) transports the positive pole piece onto the first separator layer. The moving laminating table (31) moves the separator tape and the positive pole piece to the pre-positioning and aligning mechanism (1) for aligning and carrying the negative pole piece by means of the fixture (32), and the external separator tape forms a second separator layer. The pole piece conveying manipulator (2) transports the negative pole piece onto the second separator layer, so that the positive pole piece, the negative pole piece and the external separator tape are laminated layer by layer in the order of separator, positive pole piece, separator and negative pole piece to form a battery cell; The moving laminating table (31) includes a laminating base (311), a laminating table (312) and a laminating driver (313). The laminating table (312) is slidably connected to the laminating base (311). The laminating driver (313) is used to drive the laminating table (312) to move horizontally along the laminating base (311); The laminating table (312) includes a laminating table body (3121), a laminating negative pressure table (3122) and a separator positioning negative pressure plate (3123). The laminating table (312) is slidably connected to the laminating base (311) through the laminating table body (3121). The laminating negative pressure table (3122) is fixed to the top of the laminating table body (3121). The separator positioning negative pressure plate (3123) is connected to the laminating table body (3121) and is arranged on one side of the laminating negative pressure table (3122) for adsorbing the end of the external separator tape, facilitating the external separator tape to be laid flat on the laminating negative pressure table (3122); The pre-positioning and alignment mechanism (1) includes a vision detection device (11), an alignment platform (12), a negative pressure carrier (13), and a handling manipulator (14). The handling manipulator (14) adsorbs an external pole piece through a vacuum chuck (141) and places it on the negative pressure carrier (13). The negative pressure carrier (13) is fixed to the alignment platform (12) and is used to carry the external pole piece. The vision detection device (11) is arranged above the negative pressure carrier (13) and is electrically connected to the alignment platform (12). Avoidance corners (142) for exposing the edges of the external pole piece are provided at the four corners of the vacuum chuck (141) of the handling manipulator (14). A counterpoint negative pressure area (131) is arranged inside the negative pressure carrier (13). The vision detection device (11) collects the position information of the four sides of the external pole piece on the vacuum chuck (141) of the handling manipulator (14) and the four sides of the counterpoint negative pressure area (131) through the avoidance corners (142). The alignment platform (12) drives the negative pressure carrier (13) to adjust its position according to the position information of the external pole piece.

2. The rapid lamination mechanism for pole pieces according to claim 1, characterized in that: The laminated negative pressure table (3122) is provided with a linear relief opening (3124) for an external blanking manipulator to insert and clamp the battery cell core.

3. The rapid lamination mechanism for pole pieces according to claim 1, characterized in that: The adsorption holes (3125) of the diaphragm positioning negative pressure plate (3123) are arranged in a straight line along the longitudinal direction of the diaphragm positioning negative pressure plate (3123) and are close to one side of the laminated negative pressure table (3122).

4. A rapid laminating mechanism for pole pieces according to claim 1, characterized in that: The fixture (32) includes a clamping jaw (321), a clamping jaw lifting driver (322), and a synchronization driver (323). One end of the clamping jaw (321) is connected to the clamping jaw lifting driver (322), and the other end of the clamping jaw (321) is arranged above the laminating table (312). The clamping jaw lifting driver (322) is used to drive the clamping jaw (321) to move up and down on the laminating table (312), and the synchronization driver (323) is used to drive the clamping jaw lifting driver (322) to move away from or close to the laminating table (312).

5. The rapid laminating mechanism for pole pieces according to claim 4, wherein: The clamping jaw (321) includes a pressing block (3211), an S-shaped ramp connecting block (3212), and a fixing block (3213) arranged in sequence. The pressing block (3211), the S-shaped ramp connecting block (3212), and the fixing block (3213) are integrally formed. The outer contours of the S-shaped ramp connecting block (3212) and the pressing block (3211) are both rounded. The pressing block (3211) is arranged above the laminating table (312), and the fixing block (3213) is connected to the clamping jaw lifting driver (322).

6. The rapid lamination mechanism for electrode sheets according to claim 1, characterized in that: The visual detection device (11) includes a detection fixing frame (111) and a plurality of CCD machine vision system modules (112) for collecting the position information of the four sides of the external pole piece and the four sides of the alignment negative pressure area (131). One end of the detection fixing frame (111) is provided with an adjustment fixing plate member (113), and the adjustment fixing plate member (113) is arranged directly above the alignment platform (12). The plurality of CCD machine vision system modules (112) are respectively fixed at the four corners of the adjustment fixing plate member (113).

7. A rapid lamination mechanism for electrode sheets according to claim 1, characterized in that: The diaphragm conveying device (4) includes a conveying frame (41), a diaphragm loading component, a vertical conveying roller group (46) and a buffer device (47). The external diaphragm belt is wound around the diaphragm loading component and then conveyed to the vertical conveying roller group (46). The vertical conveying roller group (46) is arranged at the lower part of the conveying frame (41) for vertically conveying the external diaphragm belt to the moving laminating table (31).

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