Lamination device and battery production line

Abstract

The present invention provides a stacking device and a battery production line, wherein the stacking device includes: a loading mechanism, suitable for circulating a pole piece material belt; a pole piece feeding mechanism, which is arranged at a downstream position of the loading mechanism and receives the pole piece material belt circulated by the loading mechanism, and the pole piece feeding mechanism is suitable for conveying pole pieces; a positioning mechanism, suitable for positioning the pole piece material belt on the pole piece feeding mechanism; a cutting mechanism, which is arranged above the pole piece feeding mechanism, and the cutting mechanism is suitable for cutting the pole piece material belt into a plurality of pole pieces in a row; a stacking mechanism, which is arranged at a downstream position of the pole piece feeding mechanism, and the stacking mechanism includes a stacking table, a gripping device and a diaphragm stacking mechanism, and the gripping device is suitable for transporting a plurality of pole pieces to the stacking station of the stacking table, and the diaphragm stacking mechanism is suitable for stacking diaphragms and pole pieces. In the above structure, the material belt has been positioned before cutting, so the pole pieces do not need to be positionally corrected before stacking, that is, there is no need to set a deviation correction station.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and in particular to a stacking device and a battery production line. Background Art

[0002] Lamination is one of the processes in battery production. The laminating machine forms a battery cell by stacking the positive electrode, diaphragm and negative electrode in sequence. In the prior art, the material strip is cut to form the electrode, which flows on the conveyor belt and is then grabbed by the laminating machine's manipulator and placed on the laminating table. However, before the electrode is laminated, the position of the electrode needs to be corrected by a deviation correction station, which takes up extra space and increases costs. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the pole pieces need to be positionally corrected by a correction station before lamination, which increases the space occupied and the cost, thereby providing a lamination device and a battery production line.

[0004] In order to solve the above problems, the present invention provides a stacking device, including: a loading mechanism, suitable for circulating electrode material strips; a electrode feeding mechanism, which is arranged at a downstream position of the loading mechanism and receives the electrode material strips circulated by the loading mechanism, and the electrode feeding mechanism is suitable for conveying electrodes; a positioning mechanism, suitable for positioning the electrode material strips on the electrode feeding mechanism; a cutting mechanism, which is arranged above the electrode feeding mechanism, and the cutting mechanism is suitable for cutting the electrode material strips into multiple rows of electrode sheets; a stacking mechanism, which is arranged at a downstream position of the electrode feeding mechanism, and the stacking mechanism includes a stacking table, a gripping device and a diaphragm stacking mechanism, the gripping device is suitable for transporting multiple electrode sheets to the stacking station of the stacking table, and the diaphragm stacking mechanism is suitable for stacking diaphragms and electrode sheets.

[0005] Optionally, the feeding direction of the loading mechanism and the feeding direction of the pole piece feeding mechanism have a preset angle.

[0006] Optionally, the angle between the feeding direction of the pole piece feeding mechanism and the feeding direction of the loading mechanism is 90°.

[0007] Optionally, the electrode sheet feeding mechanism includes a positive electrode sheet feeding mechanism and a negative electrode sheet feeding mechanism arranged in parallel, the loading mechanism includes a first loading mechanism and a second loading mechanism, the first loading mechanism is arranged on the side of the positive electrode sheet feeding mechanism, and the second loading mechanism is arranged on the side of the negative electrode sheet feeding mechanism, the positive electrode sheet feeding mechanism and the negative electrode sheet feeding mechanism are respectively located on both sides of the stacking station of the stacking table, the grasping device includes a positive electrode sheet grasping device and a negative electrode sheet grasping device, the positive electrode sheet grasping device is suitable for grasping the positive electrode sheet flowing through the positive electrode sheet feeding mechanism, and the negative electrode sheet grasping device is suitable for grasping the negative electrode sheet flowing through the negative electrode sheet feeding mechanism.

[0008] Optionally, the feeding mechanism includes a driving roller and a pressure roller that are arranged opposite to each other.

[0009] Optionally, the pole piece feeding mechanism includes a chain conveyor belt and a tray arranged on the chain conveyor belt, the tray is suitable for placing the pole piece material strip conveyed by the loading mechanism, and the cutting mechanism cuts the pole piece material strip into multiple rows of pole pieces on the tray.

[0010] Optionally, a plurality of first air holes are provided on the tray, and the plurality of first air holes are suitable for forming positive pressure or negative pressure on the upper surface of the tray.

[0011] Optionally, the first air holes include blowing holes and suction holes, the blowing holes are suitable for forming positive pressure on the upper surface of the tray, and the suction holes are suitable for forming negative pressure on the upper surface of the tray.

[0012] Optionally, the upper end of the blowing hole is inclined in a direction away from the feeding mechanism.

[0013] Optionally, the electrode feeding mechanism has a material receiving position, which corresponds to the position of the loading mechanism. The electrode feeding mechanism also includes a cover plate, which is arranged at the material receiving position and is located above the chain conveyor belt. The cover plate is provided with multiple second air holes, and the multiple second air holes are suitable for forming positive pressure on the lower surface of the cover plate.

[0014] Optionally, the lower end of the second air hole is inclined in a direction away from the feeding mechanism.

[0015] Optionally, the electrode feeding mechanism further comprises an air collecting hood, which is arranged on a side of the cover plate away from the feeding mechanism, and is suitable for generating negative pressure inside the air collecting hood so that the air flow between the cover plate and the tray flows out through the air collecting hood.

[0016] Optionally, an adsorption structure is provided on the upper part of the chain conveyor belt, and the adsorption structure extends along the extension direction of the electrode feeding mechanism. A vacuum chamber is provided in the adsorption structure, and a plurality of third air holes are provided on the upper surface of the adsorption structure. The third air holes are connected to the vacuum chamber, and when the tray moves above the adsorption structure, the third air holes are connected to the suction holes.

[0017] Optionally, the adsorption force at positions on the surface of the adsorption structure corresponding to the feeding mechanism and the grasping device is greater than the adsorption force at other positions on the surface of the adsorption structure.

[0018] Optionally, the aperture of the third air holes at the position corresponding to the surface of the adsorption structure and the feeding mechanism and the grasping device is smaller than the aperture of the third air holes at other positions on the surface of the adsorption structure; and / or the density of the third air holes at the position corresponding to the surface of the adsorption structure and the feeding mechanism and the grasping device is greater than the density of the third air holes at other positions on the surface of the adsorption structure.

[0019] Optionally, the electrode feeding mechanism further includes a cleaning brush, which is fixedly arranged on the chain conveyor belt and is suitable for cleaning the surface of the electrode or the surface of the tray.

[0020] Optionally, the electrode feeding mechanism has a material receiving position, which corresponds to the position of the feeding mechanism. Two cleaning brushes are provided, and the two cleaning brushes are respectively located at the front and rear sides of the material receiving position.

[0021] Optionally, a dust suction device is provided on the upper side of the cleaning brush.

[0022] Optionally, the cutting mechanism includes a laser cutter, which is arranged at the material receiving position and above the cover plate, and a first cutting avoidance groove is arranged on the cover plate.

[0023] Optionally, a second cutting avoidance groove is provided on the tray, and the first cutting avoidance groove and the second cutting avoidance groove are provided correspondingly.

[0024] Optionally, the pole piece feeding mechanism includes a magnetic levitation conveying mechanism and a plurality of trays arranged on the magnetic levitation conveying mechanism, the plurality of trays move independently on the magnetic levitation conveying mechanism, the trays are suitable for placing the pole piece strips conveyed by the loading mechanism, and the cutting mechanism cuts the pole piece strips into a plurality of pole pieces in rows on the trays.

[0025] The present invention also provides a battery production line, comprising the above-mentioned stacking device.

[0026] Optionally, the battery production line also includes a material strip processing station, a diaphragm hot cutting station, a gluing station and a hot pressing station, wherein the material strip processing station is arranged at an upstream position of the lamination device, and the diaphragm hot cutting station, the gluing station and the hot pressing station are arranged in sequence at a downstream position of the lamination device.

[0027] The present invention has the following advantages:

[0028] By utilizing the technical solution of the present invention, the material strip is transferred to the pole piece feeding mechanism through the feeding mechanism, the positioning mechanism positions the material strip on the pole piece feeding mechanism, and then the cutting mechanism cuts the positioned pole piece material strip to form multiple pole pieces in a row. The pole pieces are transported to the stacking mechanism through the pole piece feeding mechanism, and then directly transported to the stacking station of the stacking table through the gripping device for stacking. In the above structure, the material strip has been positioned before cutting, so the pole pieces do not need to be positionally corrected before stacking, that is, there is no need to set up a deviation correction station. Therefore, the technical solution of the present invention solves the defect in the prior art that the pole pieces need to be positionally corrected by a deviation correction station before stacking, which increases the space occupied and the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 The structural schematic diagram of the battery production line of the present invention is shown;

[0031] Figure 2 Shows Figure 1 A schematic diagram of the structure of the lamination device of the battery production line;

[0032] Figure 3 Shows Figure 2 A schematic diagram of the three-dimensional structure of the pole piece feeding mechanism of the middle lamination device;

[0033] Figure 4 Shows Figure 2 A schematic top view of the pole piece feeding mechanism and loading mechanism of the middle lamination device;

[0034] Figure 5 Shows Figure 2 A schematic diagram of the operation of the pole piece feeding mechanism of the middle lamination device;

[0035] Figure 6 Shows Figure 2 A schematic diagram of another structure of the pole piece feeding mechanism of the middle lamination device;

[0036] Figure 7 Shows Figure 2 A schematic cross-sectional view of the tray, cover plate and adsorption structure of the middle lamination device;

[0037] Figure 8 Shows Figure 7 The enlarged schematic diagram at A in the middle;

[0038] Fig. 9 Shows Figure 2 Schematic diagram of the cooperation between the tray and the pole piece of the middle lamination device;

[0039] Fig.10 Shows Fig. 9 The enlarged schematic diagram of point B in the middle;

[0040] Fig.11 Shows Figure 2 A schematic diagram of the structure of the cover plate of the middle lamination device;

[0041] Fig.12 Shows Figure 2 Schematic diagram of the coordination of the tray, cover plate and adsorption structure of the middle lamination device;

[0042] Fig.13 Shows Figure 2 Schematic diagram of the cooperation between the tray, cover plate, adsorption structure and cleaning brush of the middle lamination device;

[0043] Fig.14 Shows Fig.13 A schematic cross-sectional view of the middle cover plate;

[0044] Fig.15 Shows Figure 2 Schematic diagram of the distribution of the adsorption structure of the middle stack device;

[0045] Fig.16 Shows Figure 2 A schematic diagram of the distribution of the third air holes of the middle lamination device;

[0046] Fig.17 Shows Figure 1 A schematic diagram of the cooperation between the film making station of the middle lamination device and the pole piece feeding mechanism; and

[0047] Fig.18 Shows Figure 2 Schematic diagram of the structure of the magnetic suspension transmission mechanism of the lamination device.

[0048] Description of reference numerals:

[0049] 1. Pole piece; 10. Pole piece feeding mechanism; 101. Material receiving position; 11. Positive electrode piece feeding mechanism; 12. Negative electrode piece feeding mechanism; 13. Chain conveyor belt; 131. Magnetic suspension conveyor mechanism; 14. Tray; 141. First air hole; 1411. Blowing hole; 1412. Suction hole; 142. Second cutting avoidance groove; 15. Cover plate; 151. Second air hole; 152. First cutting avoidance groove; 16. Air collecting hood; 17. Suction Attached structure; 171, vacuum chamber; 172, third air hole; 18, cleaning brush; 19, dust suction device; 20, feeding mechanism; 21, first feeding mechanism; 22, second feeding mechanism; 30, stacking mechanism; 40, grasping device; 41, positive electrode sheet grasping device; 42, negative electrode sheet grasping device; 50, cutting mechanism; 100, material strip processing station; 200, diaphragm hot cutting station; 300, gluing station; 400, hot pressing station. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, 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 the present invention can be understood according to specific circumstances.

[0053] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] like Figure 1 and Figure 2 As shown, an embodiment of the lamination device according to the present application includes a loading mechanism 20, a pole piece feeding mechanism 20, a positioning mechanism, a cutting mechanism 50 and a lamination mechanism 30. Among them, the loading mechanism 20 is suitable for circulating pole piece material strips. The pole piece feeding mechanism 10 is arranged at a downstream position of the loading mechanism 20 and receives the pole piece material strips circulated by the loading mechanism 20, and the pole piece feeding mechanism 10 is suitable for conveying pole pieces 1. The positioning mechanism is suitable for positioning the pole piece material strip on the pole piece feeding mechanism 10. The cutting mechanism 50 is arranged above the pole piece feeding mechanism 10, and the cutting mechanism 50 is suitable for cutting the pole piece material strip into a plurality of pole pieces 1 in a row. The lamination mechanism 30 is arranged at a downstream position of the pole piece feeding mechanism 10, and the lamination mechanism 30 includes a lamination table, a gripping device 40 and a diaphragm stacking mechanism, the gripping device 40 is suitable for transporting a plurality of pole pieces 1 to the lamination station of the lamination table, and the diaphragm stacking mechanism is suitable for stacking the diaphragm and the pole piece 1.

[0055] Utilizing the technical solution of this embodiment, the material strip is transferred to the pole piece feeding mechanism 10 through the feeding mechanism 20, the positioning mechanism positions the material strip on the pole piece feeding mechanism 10, and then the cutting mechanism 50 cuts the positioned pole piece material strip to form a plurality of pole pieces 1 in a row. The pole piece 1 is transported to the stacking mechanism 30 through the pole piece feeding mechanism 10, and then directly transported to the stacking station of the stacking table through the gripping device 40 for stacking. In the above structure, the material strip has been positioned before cutting, so the pole piece 1 does not need to be positionally corrected before stacking, that is, there is no need to set up a deviation correction station. Therefore, the technical solution of this embodiment solves the defect in the prior art that the pole piece needs to be positionally corrected by a deviation correction station before stacking, which increases the space occupied and the cost.

[0056] Combination Figure 1 It can be seen that the function of the feeding mechanism 20 is to convey the pole piece material strip processed upstream and convey it to the pole piece feeding mechanism 10. After the pole piece material strip is conveyed to the pole piece feeding mechanism 10, the pole piece material strip is positioned on the pole piece feeding mechanism by the positioning structure.

[0057] Furthermore, a cutting mechanism (such as a cutter) can be set on the loading mechanism 20, or at a position between the loading mechanism 20 and the pole piece feeding mechanism 10. After the pole piece material strip is positioned on the pole piece feeding mechanism 10, the loading mechanism 20 stops loading, and the cutting mechanism cuts the pole piece material strip.

[0058] Furthermore, after the cutting mechanism cuts the electrode sheet strip, the cutting mechanism 50 cuts the electrode sheet strip, thereby forming a plurality of rows of electrode sheets 1. After the cutting is completed, the electrode sheet feeding mechanism 10 transfers the electrode sheet 1 to the lamination mechanism 30. Since the electrode sheet strip has been positioned on the electrode sheet feeding mechanism 10 by the positioning structure before cutting, the plurality of electrode sheets do not need to be positionally corrected by the deviation correction station, and can be directly grasped and transferred by the grasping device 40. The grasping device 40 transports the electrode sheet 1 to the lamination station of the lamination table of the lamination mechanism 30, and performs lamination.

[0059] When the electrode 1 is cut and transported away by the electrode feeding mechanism 10, the loading mechanism 20 is restarted to continue to transport the electrode strip to the electrode feeding mechanism 10 for the next round of positioning and cutting of the electrode strip.

[0060] In this embodiment, the stacking mechanism 30 can stack multiple groups of battery cells at the same time. The stacking station of the stacking platform is set below the gripping device 40 and the diaphragm stacking mechanism. After the gripping device 40 grabs a group of multiple pole pieces 1, the multiple pole pieces 1 are placed on the stacking station of the stacking platform. Then the diaphragm stacking mechanism stacks a layer of diaphragm, and then the gripping device places the next group of multiple pole pieces 1, and so on, to achieve the stacking of "pole piece 1-diaphragm-pole piece 1-diaphragm" and form multiple groups of battery cells.

[0061] Furthermore, the lamination mechanism 30 can achieve lamination in the following manner:

[0062] 1. The lamination station of the lamination table is fixed, and the gripping device 40 and the diaphragm lamination mechanism reciprocate in the horizontal direction;

[0063] 2. The gripping device 40 and the diaphragm stacking mechanism are fixed, and the stacking station of the stacking table moves back and forth in the horizontal direction.

[0064] In this embodiment, the gripping device 40 includes a manipulator, and a clamp is provided at the end of the manipulator. Since the cutting mechanism 50 cuts the pole piece strip into a plurality of pole pieces 1, the number of the clamps corresponds to the number of pole pieces 1. For example, the cutting mechanism 50 in this embodiment cuts the pole piece strip into four pole pieces, so the number of the clamps is also correspondingly set to four.

[0065] Furthermore, since adjacent pole pieces 1 are arranged closely after the pole piece material strip is cut, the above-mentioned multiple jaws can move away from each other (for example, driven by a cylinder). After the multiple jaws grasp multiple pole pieces 1, the adjacent pole pieces 1 can be separated by a certain distance, thereby facilitating the cutting of the diaphragm after lamination.

[0066] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the feeding direction of the loading mechanism 20 has a preset angle with the feeding direction of the pole piece feeding mechanism 10. And preferably, the angle between the feeding direction of the pole piece feeding mechanism 10 and the feeding direction of the loading mechanism 20 is 90°.

[0067] Specifically, in the prior art, after the electrode sheets are cut, they are usually transferred through a linear conveyor belt, and the positive electrode sheets and the negative electrode sheets are transferred through two parallel transmission belts. This transfer method makes the positive electrode sheets and the negative electrode sheets have opposite or opposite pole ears before entering the stacking machine, and the pole ears of the positive electrode sheets and the negative electrode sheets need to face the same direction during stacking. Therefore, the positive electrode sheets and the negative electrode sheets need to pass through the reversing station before being grasped by the gripper, and the position of the electrode sheets is turned 90° before they can enter the stacking machine for stacking.

[0068] In this embodiment, reference Figure 2 In the direction shown, the feeding direction of the loading mechanism 20 is the left-right direction, and the feeding direction of the pole piece feeding mechanism 10 is the up-down direction, that is, the feeding directions of the two are perpendicular. This arrangement enables the pole piece material strip to realize a 90° turn after it flows to the pole piece feeding mechanism 10 and is cut into pole pieces 1, and the position of the pole ear is adjusted. That is, the pole piece 1 does not need to be turned through the reversing station before being grasped by the grasping device 40, and can be directly grasped by the grasping device 40.

[0069] Therefore, there is no need to set a reversing station in the lamination device of this embodiment, which further reduces the occupied volume and equipment cost of the lamination device.

[0070] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the electrode sheet feeding mechanism 10 includes a positive electrode sheet feeding mechanism 11 and a negative electrode sheet feeding mechanism 12 arranged in parallel, and the loading mechanism 20 includes a first loading mechanism 21 and a second loading mechanism 22. The first loading mechanism 21 is arranged on the side of the positive electrode sheet feeding mechanism 11, and the second loading mechanism 22 is arranged on the side of the negative electrode sheet feeding mechanism 12. The positive electrode sheet feeding mechanism 11 and the negative electrode sheet feeding mechanism 12 are respectively located on both sides of the lamination station of the lamination table. The grasping device 40 includes a positive electrode sheet grasping device 41 and a negative electrode sheet grasping device 42. The positive electrode sheet grasping device 41 is suitable for grasping the positive electrode sheet flowing through the positive electrode sheet feeding mechanism 11, and the negative electrode sheet grasping device 42 is suitable for grasping the negative electrode sheet flowing through the negative electrode sheet feeding mechanism 12.

[0071] like Figure 2 As shown and Figure 2 Taking the direction shown as an example, the positive electrode sheet feeding mechanism 11 and the negative electrode sheet feeding mechanism 12 are arranged in parallel, the first feeding mechanism 21 is arranged on the side of the first end of the positive electrode sheet feeding mechanism 11, and the second feeding mechanism 22 is arranged on the side of the first end of the negative electrode sheet feeding mechanism 12, and the first feeding mechanism 21 and the second feeding mechanism 22 are located on the same side. A cutting mechanism 50 is arranged above the first end of the positive electrode sheet feeding mechanism 11 and the negative electrode sheet feeding mechanism 12.

[0072] Furthermore, the first feeding mechanism 21 transfers the positive electrode material strip to the positive electrode sheet feeding mechanism 11, and the cutting mechanism 50 cuts the positive electrode sheet material strip into a plurality of rows of positive electrode sheets. The second feeding mechanism 22 transfers the negative electrode material strip to the negative electrode sheet feeding mechanism 12, and the cutting mechanism 50 cuts the negative electrode sheet material strip into a plurality of rows of negative electrode sheets.

[0073] Further, from Figure 2 It can be seen that after the positive electrode material belt passes through the upper side of the second feeding mechanism 22 and the negative electrode sheet feeding mechanism 12, it docks with the first feeding mechanism 21. In this way, the positive electrode sheet material belt and the negative electrode sheet material belt can be fed from one side of the electrode sheet feeding mechanism 10, further reducing the space occupied by the system.

[0074] from Figure 2 It can be seen that the second end of the positive electrode sheet feeding mechanism 11 and the second end of the negative electrode sheet feeding mechanism 12 are respectively located on both sides of the stacking station of the stacking table. The positive electrode sheet feeding mechanism 11 conveys a row of multiple positive electrode sheets after cutting to the stacking station of the stacking table, and the negative electrode sheet feeding mechanism 12 conveys a row of multiple negative electrode sheets after cutting to the stacking station of the stacking table.

[0075] Further, the positive electrode sheet grabbing device 41 is arranged above the second end of the positive electrode sheet feeding mechanism 11, and is used to grab a row of multiple positive electrode sheets, and the negative electrode sheet grabbing device 42 is arranged above the second end of the negative electrode sheet feeding mechanism 12, and is used to grab a row of multiple negative electrode sheets. The positive electrode sheet grabbing device 41 and the negative electrode sheet grabbing device 42 are respectively located at the positions on both sides of the lamination station of the lamination platform. During the lamination process, the positive electrode sheet grabbing device 41 and the negative electrode sheet grabbing device 42 reciprocate to the top of the lamination station of the lamination platform, so as to perform lamination.

[0076] The diaphragm stacking mechanism is arranged near one of the positive electrode sheet grasping device 41 and the negative electrode sheet grasping device 42. Taking the stacking method in which the electrode sheet grasping device 40 and the diaphragm stacking mechanism reciprocate and swing as an example, and taking the diaphragm stacking mechanism near the positive electrode sheet grasping device 41 as an example, the stacking method is:

[0077] 1. The positive electrode sheet grabbing device 41 first places a row of positive electrode sheets on the lamination station of the lamination table, and at this time, the negative electrode sheet grabbing device 42 grabs a row of negative electrode sheets at the second end of the negative electrode sheet feeding mechanism 12;

[0078] 2. The negative electrode sheet grabbing device 42 moves toward the lamination station of the lamination table, and the diaphragm lamination mechanism covers the diaphragm on the aforementioned row of positive electrode sheets;

[0079] 3. The negative electrode sheet grabbing device 42 moves to the top of the lamination station of the lamination table and places a row of negative electrode sheets. At this time, the positive electrode sheet grabbing device 41 grabs a row of positive electrode sheets at the second end of the positive electrode sheet feeding mechanism 11;

[0080] 4. The positive electrode sheet grabbing device 41 moves toward the lamination station of the lamination table, and the diaphragm lamination mechanism covers the diaphragm on the aforementioned row of negative electrode sheets;

[0081] 5. The positive electrode sheet grabbing device 41 moves to above the lamination station of the lamination table and places a row of positive electrode sheets. At this time, the negative electrode sheet grabbing device 42 grabs a row of negative electrode sheets at the second end of the negative electrode sheet feeding mechanism 12.

[0082] Repeat steps 2 to 5 to stack the sheets.

[0083] As mentioned above, and from Figure 2 It can be seen that the feeding direction of the first feeding mechanism 21 is perpendicular to the feeding direction of the positive electrode sheet feeding mechanism 11, the feeding direction of the second feeding mechanism 22 is perpendicular to the feeding direction of the negative electrode sheet feeding mechanism 12, and the feeding direction of the first feeding mechanism 21 is perpendicular to the feeding direction of the second feeding mechanism 22. In this way, the posture of the positive electrode sheet flowing on the positive electrode sheet feeding mechanism 11 is consistent with the posture of the negative electrode sheet flowing on the negative electrode sheet feeding mechanism 12, the wide sides of the two are opposite, and the tabs are facing the same direction.

[0084] When the positive and negative electrode sheets are transferred to the lamination station of the lamination table, there is no need to rotate 90° to adjust the posture. The positive electrode sheet grabbing device 41 can directly grab the positive electrode sheet, and the negative electrode sheet grabbing device 42 can directly grab the negative electrode sheet. That is, the lamination device does not need to set a reversing station.

[0085] Preferably, the feeding mechanism 20 in this embodiment includes a driving roller and a pressing roller arranged opposite to each other. The driving roller and the pressing roller are arranged opposite to each other in the up-down direction, and the driving roller can be driven to rotate by an external power mechanism to convey the electrode strip. The pressing roller presses the electrode strip tightly.

[0086] Furthermore, when the driving roller rotates, the pole piece material strip can be conveyed to the pole piece feeding mechanism 10. Those skilled in the art can understand that by controlling the rotation speed of the driving roller, the conveying length of the pole piece material strip can be controlled, that is, the position of the pole piece material strip on the pole piece feeding mechanism 10 can be controlled.

[0087] Therefore, the above-mentioned positioning mechanism can be an electronically controlled mechanism, which can control the rotation speed of the driving roller, thereby controlling the feeding length of the pole piece strip, and further controlling the position of the pole piece strip on the pole piece feeding mechanism 10.

[0088] The first feeding mechanism 21 and the second feeding mechanism 22 have the same structure, that is, both include a driving roller and a pressing roller.

[0089] like Figure 3 and Figure 5 As shown, in the technical solution of this embodiment, the electrode sheet feeding mechanism 10 includes a chain conveyor 13, and a tray 14 arranged on the chain conveyor 13. The tray 14 is suitable for placing the electrode sheet material belt conveyed by the feeding mechanism 20, and the cutting mechanism 50 cuts the electrode sheet material belt into multiple rows of electrode sheets 1 on the tray 14.

[0090] First, it should be noted that the chain conveyor 13 includes a sprocket and a chain, or includes a gear and a chain-like structure with multiple grooves. Therefore, the chain conveyor 13 of this embodiment may include a sprocket chain mechanism, or may include a synchronous belt mechanism.

[0091] from Figure 3 and Figure 5 (a) It can be seen that the tray 14 is connected to the chain conveyor 13, so when the chain conveyor 13 rotates, the tray 14 can be driven to move. In addition, there are multiple trays 14, and the multiple trays are arranged at intervals along the direction of the chain conveyor 13, that is, multiple groups of pole pieces 1 are circulated on the chain conveyor 13.

[0092] from Figure 5 (a) Figure 5 (b) and Figure 5(c) It can be seen that there are many ways to connect the tray 14 and the chain conveyor 13. Figure 5 In the structure shown in (a), the chain conveyor 13 includes a double guide rail, which is respectively connected to both sides of the bottom of the tray 14. Figure 5 In the structure shown in (b), the chain conveyor 13 includes a single guide rail, which is connected to the bottom middle position of the tray 14. Figure 5 In the structure shown in (c), the chain conveyor 13 includes a single guide rail, which is connected to the bottom side of the tray 14.

[0093] In the prior art, the pole piece 1 is usually transported by a belt conveyor, but the belt conveyor has the problem of slipping, so the conveying accuracy of the pole piece is poor, and the position needs to be adjusted by a deviation correction station before lamination.

[0094] In this embodiment, the pole piece 1 is conveyed by a chain conveyor 13. Compared with the prior art, the chain conveyor 13 has a precise and stable transmission and will not slip, so that the pole piece 1 can be conveyed with high precision. The pole piece 1 does not need to be adjusted in position by a deviation correction station, but can be directly grasped by the grasping device 40.

[0095] like Fig.18 As shown, the above-mentioned pole piece feeding mechanism 10 may include a magnetic suspension conveying mechanism 131, and a plurality of trays 14 arranged on the magnetic suspension conveying mechanism 131. The plurality of trays 14 move independently on the magnetic suspension conveying mechanism 131, that is, the distance between adjacent trays 14 is variable, rather than a fixed value. The tray 14 is suitable for placing the pole piece material strip conveyed by the feeding mechanism 20, and the cutting mechanism 50 cuts the pole piece material strip into a plurality of pole pieces 1 in rows on the tray 14.

[0096] That is, the chain conveyor 13 can be replaced by a magnetic suspension conveyor mechanism 131. The principle of the magnetic suspension conveyor mechanism 131 is to suspend the tray 14 on the guide rail through the action of magnetic force, so as to realize high-speed and high-precision transportation of the pole piece 1. The magnetic suspension conveyor 131 may include a guide rail, a magnetic suspension device, and a control system. The guide rail is composed of a series of magnets, and the polarities of the magnets are arranged alternately to form a magnetic field. The magnetic suspension device is arranged below the tray 14, and is composed of a magnetic suspension body and an electromagnet. By changing the current of the electromagnet, the suspension height of the magnetic suspension body can be controlled, and high-speed transportation and low-speed transportation can be realized.

[0097] Furthermore, compared with the chain conveyor 13, the magnetic suspension conveyor mechanism 131 can also realize high-precision conveying of the pole piece 1, and on the other hand, multiple trays 14 can move independently and at variable intervals. When a certain tray 14 is receiving and cutting at the receiving position 101, the upstream tray 14 can move close to the aforementioned tray 14. When the cutting of the pole piece strip is completed, the next tray 14 can quickly move to the receiving position 101, greatly improving the production cycle.

[0098] from Figure 4 It can be seen that when a certain tray 14 flows to the position corresponding to the feeding mechanism 20, that is, the receiving position 101, the driving roller of the feeding mechanism 20 rotates to convey the electrode material strip to the tray 14. After the electrode material strip is positioned by the positioning mechanism, the cutting mechanism cuts off the electrode 1. Then the cutting mechanism 50 cuts the electrode material strip on the tray 14 into a plurality of rows of electrode sheets 1. Therefore, the tray 14 plays the role of receiving the electrode material strip and also serves as the bottom plate of the cutting mechanism 50. After the cutting of the electrode material strip is completed, the chain conveyor 13 drives the electrode 1 to flow downstream, that is, toward the stacking station of the stacking table. The next tray 14 moves to the receiving position to receive the next section of the electrode material strip.

[0099] In one embodiment, a baffle may be provided on the side of the tray 14 facing away from the feeding mechanism 20, and the positioning mechanism may include a detection sensor provided on the baffle, and the detection sensor may detect the distance from the end of the pole piece strip to the baffle. When the detection sensor detects that the end of the pole piece strip is about to contact the baffle, it means that the pole piece strip is about to be delivered to the position, and the positioning mechanism controls the driving roller of the feeding mechanism 20 to stop rotating, so as to realize high-precision delivery of the feeding mechanism.

[0100] In this embodiment, the chain conveyor 13 drives the tray 14 to rotate in a circle. In some embodiments not shown, the chain conveyor 13 may also include other configurations. Figure 6 As shown, the chain conveyor 13 may be two chain conveyors 13 arranged opposite to each other in the upper and lower directions, and the ends of the two chain conveyors 13 are connected by an upper and lower lifting mechanism. When the tray 14 of the upper chain conveyor 13 moves to the end, the tray 14 is driven down by the upper and lower lifting mechanism and flows to the upper surface of the lower chain conveyor 13. When the tray 14 on the lower chain conveyor 13 moves to the end, the tray 14 is driven up by the upper and lower lifting mechanism and flows to the upper surface of the upper chain conveyor 13.

[0101] like Figures 7 to 10 As shown, in the technical solution of this embodiment, a plurality of first air holes 141 are provided on the tray 14 , and the plurality of first air holes 141 are suitable for forming positive pressure or negative pressure on the upper surface of the tray 14 .

[0102] Specifically, when the feeding mechanism 20 flows the electrode material strip onto the tray 14 , the first air hole 141 forms a positive pressure on the upper surface of the tray 14 , so that the electrode material strip is in a slightly suspended state, thereby preventing the electrode material strip from wrinkling during the forward movement or bending after colliding with the tray 14 .

[0103] When the pole piece strip needs to be cut on the tray 14 , the first air holes 141 form negative pressure on the upper surface of the tray 14 , thereby adsorbing the pole piece strip on the surface of the tray 14 to prevent the pole piece strip from moving during the cutting process.

[0104] Furthermore, among the plurality of first air holes 141, a portion of the first air holes 141 may be connected to an external positive pressure system, and the remaining portion of the first air holes 141 may be connected to an external negative pressure system, so that among the plurality of first air holes 141, a portion of the first air holes 141 may form a positive pressure on the upper surface of the tray 14, and the remaining portion of the first air holes 141 may form a negative pressure on the upper surface of the tray 14. The pole piece strip may be subjected to air blowing suspension or air suction adsorption according to the tray 14, and the first air holes 141 may be opened and closed accordingly.

[0105] Furthermore, among the plurality of first air holes 141, each of the first air holes 141 can be connected to an external positive pressure system and an external negative pressure system, and the external positive pressure system and the external negative pressure system can be switched. According to the tray 14, the pole piece strip needs to be suspended by blowing or adsorbed by suction, and the external positive pressure system and the external negative pressure system are switched accordingly.

[0106] like Figures 8 to 10 As shown, in the technical solution of this embodiment, the first air hole 141 includes an air blowing hole 1411 and an air suction hole 1412 , the air blowing hole 1411 is suitable for forming a positive pressure on the upper surface of the tray 14 , and the air suction hole 1412 is suitable for forming a negative pressure on the upper surface of the tray 14 .

[0107] Specifically, the blowing hole 1411 is connected to an external positive pressure system, and the blowing hole 1411 can blow air on the upper surface of the tray 14 to form a positive pressure, so that the electrode strip is in a slightly suspended state. The suction hole 1412 is connected to an external negative pressure system, and the suction hole 1412 can suck air on the upper surface of the tray 14 to form a negative pressure, so that the electrode strip is adsorbed on the tray 14.

[0108] The arrangement of the blowing holes 1411 and the suction holes 1412 is as follows: Fig.10As shown, both are structures of multiple rows and columns. The difference is that the density of the blowing holes 1411 is greater than the density of the suction holes 1412, and the aperture of the blowing holes 1411 is smaller than the aperture of the suction holes 1412. One column of suction holes 1412 is distributed between two adjacent columns of blowing holes 1411, so that the blowing holes 1411 and the suction holes 1412 are staggered.

[0109] Furthermore, the blowing hole 1411 and the suction hole 1412 are both provided with switches (such as movable baffles), which can independently control the opening or closing of the blowing hole 1411 and the suction hole 1412.

[0110] like Figure 8 As shown, in the technical solution of this embodiment, the upper end of the blowing hole 1411 is tilted in the direction away from the feeding mechanism 20. In this way, the airflow of the blowing hole 1411 is blown out in a tilted direction away from the feeding mechanism 20, so the airflow blown out from the blowing hole 1411 can exert a driving force on the pole piece strip away from the feeding mechanism 20, thereby playing the effect of assisting the feeding and pushing the pole piece strip to move.

[0111] from Figure 8 It can also be seen that the axis of the suction hole 1412 is perpendicular to the plane of the upper surface of the tray 14, that is, the suction hole 1412 is a straight hole. This arrangement allows the suction hole 1412 to apply a vertical downward suction force to the electrode strip, ensuring that the position of the electrode strip does not shift.

[0112] like Figure 4 , Figure 7 , Figure 8 , Figures 11 to 13 As shown, in the technical solution of this embodiment, the electrode feeding mechanism 10 has a material receiving position 101, and the material receiving position 101 corresponds to the position of the feeding mechanism 20. The electrode feeding mechanism 10 also includes a cover plate 15, which is arranged at the material receiving position 101 and is located above the chain conveyor 13. The cover plate 15 is provided with a plurality of second air holes 151, and the plurality of second air holes 151 are suitable for forming a positive pressure on the lower surface of the cover plate 15.

[0113] Specifically, the cover plate 15 is fixedly arranged above the chain conveyor 13, and the cover plate 15 is arranged opposite to the feeding mechanism 20. When the multiple trays 14 move, they can pass under the cover plate 15 in sequence. When a certain tray 14 moves to the receiving position 101, the tray 14 is located under the cover plate 15 and receives the electrode material belt flowing from the feeding mechanism 20.

[0114] Furthermore, the function of the cover plate 15 is mainly to limit the upper position of the electrode strip. As mentioned above, during the loading process of the electrode strip, the blowing holes 1411 on the tray 14 will blow air below the electrode strip to generate positive pressure. In order to prevent the electrode strip from being blown away, a cover plate 15 needs to be provided above the electrode strip.

[0115] Furthermore, the cover plate 15 is provided with a plurality of second air holes 151, which can be connected to an external positive pressure system, so that the second air holes 151 blow air on the lower surface of the cover plate 15 to form positive pressure. The second air holes 151 function similarly to the above-mentioned blowing holes 1411, preventing the pole piece strip from wrinkling during the forward movement, or bending after colliding with the cover plate 15. Those skilled in the art can understand that, through the blowing holes 1411 and the second air holes 151, the pole piece strip is suspended between the tray 14 and the cover plate 15 during the forward movement.

[0116] Of course, when cutting the pole piece strip, the second air holes 151 need to be closed to prevent the downward airflow from interfering with the position of the pole piece strip.

[0117] like Figure 8 As shown, in the technical solution of this embodiment, the lower end of the second air hole 151 is inclined in the direction away from the feeding mechanism 20. The second air hole 151 is similar in structure to the above-mentioned blowing hole 1411, and both are inclined holes. In this way, the airflow of the second air hole 151 is blown out in an inclined direction away from the feeding mechanism 20, so the airflow blown out from the second air hole 151 can exert a driving force on the pole piece strip away from the feeding mechanism 20, thereby playing the effect of assisting the feeding and pushing the pole piece strip to move.

[0118] It can be seen that the above-mentioned blowing holes 1411 and the second air holes 151 not only prevent the electrode material strip from wrinkling and bending during transportation, but also assist in loading and pushing the electrode material strip.

[0119] like Figure 4 , Figure 8 and Fig.13 As shown, in the technical solution of this embodiment, the electrode feeding mechanism 10 also includes an air collecting hood 16, which is arranged on the side of the cover plate 15 away from the feeding mechanism 20, and the air collecting hood 16 is suitable for generating negative pressure so that the air flow between the cover plate 15 and the tray 14 flows out through the air collecting hood 16.

[0120] Specifically, the air collecting hood 16 has an air inlet, which covers the gap between the tray 14 and the cover plate 15, and generates negative pressure at the air inlet. In this way, during the feeding process of the electrode material strip, most of the airflow blown out from the blowing hole 1411 and the second air hole 151 can be collected and discharged through the air collecting hood 16, which also plays the role of collecting dust and residue on the electrode material strip.

[0121] Furthermore, when the pole piece strip is cut, the negative pressure of the air collecting hood 16 is closed to prevent the airflow from interfering with the position of the pole piece strip.

[0122] like Figure 3 and Fig.15 As shown, in the technical solution of this embodiment, an adsorption structure 17 is provided on the upper part of the chain conveyor 13, and the adsorption structure 17 extends along the extension direction of the electrode feeding mechanism 10. A vacuum cavity 171 is provided in the adsorption structure 17, and a plurality of third air holes 172 are provided on the upper surface of the adsorption structure 17, and the third air holes 172 are connected to the vacuum cavity 171. When the tray 14 moves above the adsorption structure 17, the third air holes 172 are connected to the suction holes 1412.

[0123] Specifically, the adsorption structure 17 is fixedly arranged at an upper position on the inner side of the chain conveyor 13, and the tray 14 passes over the adsorption structure 17 when moving. The adsorption structure 17 can be a box-shaped structure formed by a top wall, a bottom wall and a side wall, so the adsorption structure 17 has an inner cavity. The adsorption structure 17 is connected to an external vacuum system, so that the inner cavity of the adsorption structure 17 forms a vacuum cavity 171, and negative pressure is formed at the third air hole 172 of the adsorption structure 17.

[0124] The vacuum chamber 171 can be arranged in various ways, such as Fig.15 As shown in (a), when the guide rail of the chain conveyor 13 is connected to the side of the tray 14, the vacuum chamber 171 is set to be one and is located directly below the tray 14. Fig.15 As shown in (b), when the guide rail of the chain conveyor 13 is connected to the middle of the tray 14, two vacuum chambers 171 are provided, and the two vacuum chambers 171 are located below the tray 14 and on both sides of the guide rail.

[0125] Furthermore, the adsorption structure 17 is an elongated structure as a whole, and the adsorption structure 17 extends along the upper extension direction of the chain conveyor 13. Both ends of the adsorption structure 17 extend at least to the material receiving position 101 and the gripping position of the gripping device 40. The above-mentioned multiple third air holes 172 are also arranged along the extension direction of the adsorption structure 17. When the tray 14 moves to the top of the adsorption structure 17 and the air suction hole 1412 is opened, the air suction hole 1412 is connected with the third air hole 172. Therefore, the negative pressure in the vacuum chamber 171 can be transmitted to the upper surface of the tray 14 through the third air hole 172 and the air suction hole 1412, that is, a negative pressure is formed on the upper surface of the tray 14.

[0126] Specifically, when the electrode strip needs to be cut, the blowing hole 1411 and the second air hole 151 are closed, the suction hole 1412 is opened, and the adsorption structure 17 forms a negative pressure on the upper surface of the tray 14 to fix the electrode strip on the tray 14. After the electrode strip cutting structure forms the electrode 1, the tray 14 moves downstream and passes over the adsorption structure 17. In this process, the negative pressure in the vacuum chamber 171 is always transmitted to the upper surface of the tray 14 through the third air hole 172 and the suction hole 1412, so the electrode 1 is always close to the upper surface of the tray 14 during the circulation process, ensuring the position accuracy of the electrode 1 on the tray 14 during the circulation process.

[0127] When the grasping device 40 needs to grasp the pole piece 1, the suction hole 1412 is closed, and the negative pressure on the upper surface of the tray 14 disappears.

[0128] like Fig.16 As shown, the adsorption force at the positions corresponding to the feeding mechanism 20 and the gripping device 40 on the surface of the adsorption structure 17 is greater than the adsorption force at other positions on the surface of the adsorption structure 17. The adsorption force of the adsorption structure 17 at the receiving position 101 and the gripping position is greater. Fig.16 It can be seen that the adsorption force at both ends of the adsorption structure 17 is greater than the adsorption force in the middle of the adsorption structure 17 .

[0129] Specifically, before the electrode strip is cut on the tray 14, it needs to be quickly adsorbed and positioned to speed up the production cycle, so the adsorption force of the adsorption structure 17 at the receiving position 101 is appropriately increased. When the electrode 1 follows the tray 14 to move to the position below the gripping device 40, it needs to stop. During the stopping process, the tray 14 will decelerate, so the adsorption force of the adsorption structure 17 at the gripping position is appropriately increased to prevent the electrode 1 from shifting due to inertia.

[0130] Furthermore, the tray 14 mostly runs at a uniform speed at a position between the material receiving position 101 and the gripping position, so the adsorption force of the adsorption structure 17 at a position between the material receiving position 101 and the gripping position can be appropriately reduced.

[0131] In this embodiment, the adsorption force of the adsorption structure 17 can be controlled in two ways, including controlling the density of the third through holes 172 and controlling the aperture size of the third through holes 172 .

[0132] Specifically, the aperture of the third air hole 172 at the position on the surface of the adsorption structure 17 corresponding to the feeding mechanism 20 and the grasping device 40 is smaller than the aperture of the third air hole 172 at other positions on the surface of the adsorption structure 17. When the air flow rate is the same, the smaller the aperture of the third air hole 172, the faster the air flow speed, and thus the greater the adsorption force generated.

[0133] Therefore, the diameter of the third air hole 172 at the surface of the adsorption structure 17 and the corresponding position of the feeding mechanism 20 and the grasping device 40 is small, so that the tray 14 has a large adsorption force at the receiving position 101, and can quickly adsorb the electrode material strip to improve the production cycle. At the same time, the tray 14 has a large adsorption force at the position below the grasping device 40, preventing the electrode 1 from shifting due to inertia, and realizing high-precision transportation of the electrode 1.

[0134] Since the electrode 1 keeps moving at a constant speed at the receiving position 101 and other positions of the gripping device 40, the adsorption force of the tray 14 on the electrode 1 can be appropriately reduced, so the aperture of the third air holes 172 at other positions on the surface of the adsorption structure 17 is relatively small.

[0135] Furthermore, the density of the third air holes 172 at the positions corresponding to the feeding mechanism 20 and the gripping device 40 on the surface of the adsorption structure 17 is greater than the density of the third air holes 172 at other positions on the surface of the adsorption structure 17. The greater the density of the third air holes 172, the greater the flow rate of the airflow, and thus the greater the adsorption force generated.

[0136] Therefore, the density of the third air holes 172 at the corresponding positions of the surface of the adsorption structure 17 and the feeding mechanism 20 and the grasping device 40 is relatively large, so that the tray 14 has a relatively large adsorption force at the receiving position 101, and can quickly adsorb the electrode material strip, thereby improving the production cycle. At the same time, the tray 14 has a relatively large adsorption force at the position below the grasping device 40, which prevents the electrode 1 from being offset due to inertia, thereby achieving high-precision transportation of the electrode 1.

[0137] Since the electrode 1 keeps moving at a substantially uniform speed at the receiving position 101 and other positions of the gripping device 40 , the adsorption force of the tray 14 on the electrode 1 can be appropriately reduced, so the density of the third air holes 172 at other positions on the surface of the adsorption structure 17 is relatively small.

[0138] like Figure 3 and Fig.13As shown, in the technical solution of this embodiment, the electrode feeding mechanism 10 also includes a cleaning brush 18 , which is fixedly arranged on the chain conveyor 13 , and the cleaning brush 18 is suitable for cleaning the surface of the electrode 1 or the surface of the tray 14 .

[0139] Specifically, when the tray 14 moves driven by the chain conveyor 13, the cleaning brush 18 can pass over the outer surface of the tray 14 (i.e., the surface carrying the electrode 1). The electrode strip is then cut into electrode 1, or dust and slag are generated, and the cleaning brush 18 can clean the dust and slag.

[0140] Furthermore, the cleaning brush 18 can be arranged on the moving path of the pole piece 1, so that the surface of the pole piece 1 can be cleaned. In addition, the cleaning brush 18 can also be arranged at other positions of the chain conveyor 13, and when the tray 14 does not carry the pole piece 1, the cleaning brush 18 can clean the surface of the tray 14.

[0141] like Figure 3 and Fig.13 As shown, in the technical solution of this embodiment, two cleaning brushes 18 are provided, and the two cleaning brushes 18 are respectively located at the front and rear sides of the material receiving position 101. More specifically, the two cleaning brushes are respectively arranged at the front and rear edges of the cover plate 15.

[0142] Furthermore, when the tray 14 moves to the bottom of the cover plate 15, the cleaning brush 18 at the front edge of the cover plate 15 can clean the surface of the tray 14. When the pole piece strip is cut, the cleaning brush 18 at the rear edge of the cover plate 15 can clean the surface of the pole piece 1 during the downstream flow of the tray 14.

[0143] In addition, if Fig.13 As shown, when the tray 14 moves to the bottom of the cover plate 15, the tray 14, the cover plate 15 and the two cleaning brushes 18 enclose a nearly closed space, which can reduce the diffusion of dust and slag during the cutting process, and enhance the effect of positive pressure and negative pressure.

[0144] like Fig.14 As shown, in the technical solution of this embodiment, a dust collecting device 19 is provided on the upper side of the cleaning brush 18. Specifically, the cleaning brush 18 can be driven to rotate by a driving mechanism such as a motor, thereby enhancing the cleaning effect. The dust and material residue swept up by the cleaning brush 18 during the rotation process can be absorbed by the dust collecting device 19 to prevent the dust and material residue from spreading outward.

[0145] like Figure 2 and Fig.11 As shown, in the technical solution of this embodiment, the cutting mechanism 50 includes a laser cutter, which is arranged at the material receiving position 101 and located above the cover plate 15 , and a first cutting avoidance groove 152 is arranged on the cover plate 15 .

[0146] Specifically, the laser cutter can generate laser light, and the laser light passes through the first cutting avoidance groove 152 to cut the pole piece strip, so as to cut the pole piece strip into a plurality of pole pieces 1 in rows.

[0147] Furthermore, there are a plurality of first cutting avoidance grooves 152 arranged in parallel, and the specific number of the first cutting avoidance grooves 152 can be determined according to the number of pole pieces 1 cut from the pole piece strip.

[0148] like Figures 9 to 12 As shown, in the technical solution of this embodiment, the second cutting avoidance groove 142 is provided on the tray 14, and the first cutting avoidance groove 152 and the second cutting avoidance groove 142 are provided correspondingly. When the tray 14 moves to the lower position of the cover plate 15, the first cutting avoidance groove 152 and the second cutting avoidance groove 142 correspond to each other up and down, and the laser emitted by the laser cutter passes through the first cutting avoidance groove 152 to cut the pole piece strip, and the end of the laser is irradiated into the second cutting avoidance groove 142.

[0149] Preferably, the number and arrangement positions of the second cutting avoidance grooves 142 are the same as the number and arrangement positions of the first cutting avoidance grooves 152 .

[0150] Of course, the cutting mechanism 50 can be used for metal die cutting in addition to laser cutting.

[0151] like Figure 1 As shown, the present application also provides a battery production line. According to an embodiment of the battery production line of the present application, the above-mentioned stacking device is included.

[0152] Furthermore, the battery production line also includes a material strip processing station 100, a diaphragm hot cutting station 200, a gluing station 300 and a hot pressing station 400, wherein the material strip processing station 100 is arranged at an upstream position of the lamination device, and the diaphragm hot cutting station 200, the gluing station 300 and the hot pressing station 400 are arranged in sequence at a downstream position of the lamination device.

[0153] from Fig.17 It can be seen that the material strip processing station 100 may include a pole piece material strip unwinding mechanism, and after the material strip is unwound, it is conveyed by a conveying roller and a pressing roller. The material strip processing station 100 may also include a rolling mechanism, a pole ear cutting mechanism, etc. The pole piece material strip after processing is conveyed to the tray 14 of the pole piece feeding mechanism 10 by the loading mechanism 20.

[0154] like Figure 1As shown, after the lamination mechanism 30 completes lamination, the battery cell needs to be transferred to the diaphragm hot cutting station 200 through a robot. Since the electrode sheet feeding mechanism 10 transfers multiple electrode sheets 1 in a row, after lamination, the battery cells are multiple in a row, and adjacent battery cells are connected by diaphragms. Therefore, the multiple battery cells need to have the connected diaphragms cut off at the diaphragm hot cutting station 200 to form a single battery cell.

[0155] like Figure 1 As shown, the single battery cell continues to flow to the glue sticking station 300. At the glue sticking station 300, the battery cell is glued and fixed around so that the battery cell molding will not fall apart.

[0156] like Figure 1 As shown, after the single battery cell is glued, it continues to flow to the hot pressing station 400 to press the positive electrode sheet, the separator and the negative electrode sheet tightly.

[0157] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A lamination device, characterized in that: include: A feeding mechanism (20) adapted to transfer the electrode strip; A pole piece feeding mechanism (10) is arranged at a downstream position of the feeding mechanism (20) and receives the pole piece material belt circulated by the feeding mechanism (20); the pole piece feeding mechanism (10) is suitable for conveying pole pieces (1); a tray (14) is arranged on the pole piece feeding mechanism (10); the tray (14) is movably arranged; the tray (14) is suitable for placing the pole piece material belt conveyed by the feeding mechanism (20); a plurality of first air holes (141) are arranged on the tray; the plurality of first air holes (141) are suitable for forming positive pressure or negative pressure on the upper surface of the tray (14); A positioning mechanism, suitable for positioning the pole piece strip on the pole piece feeding mechanism (10); A cutting mechanism (50) is arranged above the electrode sheet feeding mechanism (10), the cutting mechanism (50) being suitable for cutting the electrode sheet material strip into a plurality of electrode sheets (1) arranged in rows on the tray (14); A lamination mechanism (30) is arranged at a downstream position of the electrode sheet feeding mechanism (10), the lamination mechanism (30) comprising a lamination table, a gripping device (40) and a diaphragm lamination mechanism, the gripping device (40) being suitable for transporting a plurality of the electrode sheets (1) to a lamination station of the lamination table, and the diaphragm lamination mechanism being suitable for laminating the diaphragm and the electrode sheets (1).

2. The lamination device according to claim 1, characterized in that: The feeding direction of the loading mechanism (20) and the feeding direction of the pole piece feeding mechanism (10) have a preset angle.

3. The lamination device according to claim 2, characterized in that: The angle between the feeding direction of the pole piece feeding mechanism (10) and the feeding direction of the loading mechanism (20) is 90°.

4. The lamination device according to claim 1, characterized in that: The electrode sheet feeding mechanism (10) comprises a positive electrode sheet feeding mechanism (11) and a negative electrode sheet feeding mechanism (12) which are arranged in parallel; the loading mechanism (20) comprises a first loading mechanism (21) and a second loading mechanism (22); the first loading mechanism (21) is arranged on the side of the positive electrode sheet feeding mechanism (11); the second loading mechanism (22) is arranged on the side of the negative electrode sheet feeding mechanism (12); the positive electrode sheet feeding mechanism (11) and the negative electrode sheet feeding mechanism (12) are respectively located on both sides of the lamination station of the lamination table; the grasping device (40) comprises a positive electrode sheet grasping device (41) and a negative electrode sheet grasping device (42); the positive electrode sheet grasping device (41) is suitable for grasping the positive electrode sheet flowing through the positive electrode sheet feeding mechanism (11); and the negative electrode sheet grasping device (42) is suitable for grasping the negative electrode sheet flowing through the negative electrode sheet feeding mechanism (12).

5. The lamination device according to claim 1, characterized in that: The feeding mechanism (20) comprises a driving roller and a pressure roller which are arranged opposite to each other.

6. The lamination device according to any one of claims 1 to 5, characterized in that: The electrode feeding mechanism (10) comprises a chain conveyor belt (13), and the tray (14) is arranged on the chain conveyor belt (13).

7. The lamination device according to claim 6, characterized in that: The first air holes (141) comprise an air blowing hole (1411) and an air suction hole (1412); the air blowing hole (1411) is suitable for forming a positive pressure on the upper surface of the tray (14); and the air suction hole (1412) is suitable for forming a negative pressure on the upper surface of the tray (14).

8. The lamination device according to claim 7, characterized in that: The upper end of the blowing hole (1411) is arranged to be inclined in a direction away from the feeding mechanism (20).

9. The lamination device according to claim 6, characterized in that: The electrode feeding mechanism (10) has a material receiving position (101), the material receiving position (101) corresponds to the position of the feeding mechanism (20), and the electrode feeding mechanism (10) also includes a cover plate (15), the cover plate (15) is arranged at the material receiving position (101) and is located above the chain conveyor belt (13), and a plurality of second air holes (151) are arranged on the cover plate (15), and the plurality of second air holes (151) are suitable for forming a positive pressure on the lower surface of the cover plate (15).

10. The lamination device according to claim 9, characterized in that: The lower end of the second air hole (151) is arranged to be inclined in a direction away from the feeding mechanism (20).

11. The lamination device according to claim 9, characterized in that: The electrode feeding mechanism (10) further comprises an air collecting hood (16), the air collecting hood (16) being arranged on a side of the cover plate (15) facing away from the feeding mechanism (20), and the air collecting hood (16) being suitable for generating negative pressure inside so that the air flow between the cover plate (15) and the tray (14) flows out through the air collecting hood (16).

12. The lamination device according to claim 7, characterized in that: An adsorption structure (17) is provided on the upper part of the chain conveyor (13), the adsorption structure (17) extending along the extension direction of the electrode feeding mechanism (10), a vacuum chamber (171) is provided in the adsorption structure (17), a plurality of third air holes (172) are provided on the upper surface of the adsorption structure (17), the third air holes (172) are connected to the vacuum chamber (171), and when the tray (14) moves above the adsorption structure (17), the third air holes (172) are connected to the suction holes (1412).

13. The lamination device according to claim 12, characterized in that: The adsorption force at positions corresponding to the surface of the adsorption structure (17) and the feeding mechanism (20) and the grasping device (40) is greater than the adsorption force at other positions on the surface of the adsorption structure (17).

14. The lamination device according to claim 13, characterized in that: The aperture of the third air holes (172) at the position corresponding to the surface of the adsorption structure (17) and the feeding mechanism (20) and the grasping device (40) is smaller than the aperture of the third air holes (172) at other positions on the surface of the adsorption structure (17); and / or the density of the third air holes (172) at the position corresponding to the surface of the adsorption structure (17) and the feeding mechanism (20) and the grasping device (40) is greater than the density of the third air holes (172) at other positions on the surface of the adsorption structure (17).

15. The lamination device according to claim 6, characterized in that: The electrode feeding mechanism (10) further comprises a cleaning brush (18), wherein the cleaning brush (18) is fixedly arranged on the chain conveyor belt (13), and the cleaning brush (18) is suitable for cleaning the surface of the electrode (1) or the surface of the tray (14).

16. The lamination device according to claim 15, characterized in that: The electrode feeding mechanism (10) has a material receiving position (101), the material receiving position (101) corresponds to the position of the feeding mechanism (20), and two cleaning brushes (18) are provided, and the two cleaning brushes (18) are respectively located at the front and rear sides of the material receiving position (101).

17. The lamination device according to claim 16, characterized in that: A dust suction device (19) is provided on the upper side of the cleaning brush (18).

18. The lamination device according to claim 9, characterized in that: The cutting mechanism (50) comprises a laser cutter, the laser cutter being arranged at the material receiving position (101) and located above the cover plate (15), and a first cutting avoidance groove (152) being arranged on the cover plate (15).

19. The lamination device according to claim 18, characterized in that: The tray (14) is provided with a second cutting avoidance groove (142), and the first cutting avoidance groove (152) and the second cutting avoidance groove (142) are provided correspondingly.

20. The lamination device according to any one of claims 1 to 5, characterized in that: The pole piece feeding mechanism (10) comprises a magnetic suspension conveying mechanism (131), and a plurality of trays (14) arranged on the magnetic suspension conveying mechanism (131), wherein the plurality of trays (14) move independently on the magnetic suspension conveying mechanism (131), the trays (14) being suitable for placing pole piece strips conveyed by the loading mechanism (20), and the cutting mechanism (50) cutting the pole piece strips on the trays (14) into a plurality of pole pieces (1) arranged in rows.

21. A battery production line, characterized in that: Comprising a lamination device as claimed in any one of claims 1 to 20.

22. The battery production line according to claim 21, characterized in that: The battery production line further comprises a material strip processing station (100), a diaphragm hot cutting station (200), a gluing station (300) and a hot pressing station (400), wherein the material strip processing station (100) is arranged at an upstream position of the lamination device, and the diaphragm hot cutting station (200), the gluing station (300) and the hot pressing station (400) are arranged in sequence at a downstream position of the lamination device.

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