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 stacking table, which is fixedly arranged; a diaphragm feeding mechanism, which is fixedly arranged and suitable for providing diaphragms to the stacking table; a positive electrode sheet feeding mechanism and a negative electrode sheet feeding mechanism, which are respectively suitable for providing positive electrode sheets and negative electrode sheets to the stacking table; a film laying mechanism, which is movably arranged above the stacking table, and is suitable for grabbing the diaphragm and reciprocating along the feeding direction of the film laying mechanism above the stacking table; a material unloading and conveying mechanism, which is movably arranged on the side of the stacking table; a hot cutting mechanism, a gluing mechanism and a hot pressing mechanism, which are arranged on the moving path of the material unloading and conveying mechanism. In the above structure, on the one hand, the film laying mechanism is light in weight and can realize high-speed reciprocating movement, which greatly improves the stacking efficiency; on the other hand, the stacking table and the diaphragm feeding mechanism are both fixedly arranged, that is, the two do not move in a plane, thereby reducing the overall occupied space of the stacking device.

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 important processes in battery production. During lamination, the positive electrode sheets, diaphragms and negative electrode sheets need to be stacked back and forth to form a battery cell. A lamination machine is a device specially used for the lamination process. In the prior art, lamination machines usually use two methods for lamination. One method is that the lamination table is stationary and the diaphragm unwinding mechanism moves back and forth; the other method is that the diaphragm unwinding mechanism is stationary and the lamination table moves back and forth. In these two lamination methods, the positive electrode sheets and negative electrode sheets are placed on the lamination table through a conveying mechanism cycle, and the diaphragm moves back and forth relative to the lamination table to achieve laying in two directions, and finally form a battery cell form of "positive electrode sheet-diaphragm-negative electrode sheet-diaphragm-positive electrode sheet".

[0003] However, in the above-mentioned stacking machine, on the one hand, the stacking table and the diaphragm unwinding mechanism are heavy, so the reciprocating movement speed of the two is limited, affecting the stacking efficiency; on the other hand, the reciprocating movement of the stacking table or the diaphragm unwinding mechanism requires additional planar movement space, and the diaphragm unwinding mechanism is usually arranged on the top of the stacking table, which requires additional vertical space, so the stacking machine occupies a large space.

[0004] In addition, after the stacking machine in the prior art completes the stacking, the battery cells need to undergo subsequent processing steps such as hot cutting, gluing, and hot pressing. The adjacent subsequent processing stations need to be transferred using a separate transfer mechanism (for example, after stacking, the first manipulator is used to move the battery cells to the hot cutting station, and after the hot cutting is completed, the second manipulator is used to move the battery cells to the gluing station), which makes the subsequent processing speed of the battery cells slow, affecting the process beat and production efficiency of the front stacking process. Multiple handling can also easily damage the battery cells, affecting product quality. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the stacking machine in the prior art, such as low stacking efficiency and large space occupation, thereby providing a stacking device and a battery production line.

[0006] In order to solve the above problems, the present invention provides a stacking device, including: a stacking table, which is fixed; a diaphragm feeding mechanism, which is fixed and suitable for providing diaphragms to the stacking table; a positive electrode sheet feeding mechanism and a negative electrode sheet feeding mechanism, which are respectively suitable for providing positive electrode sheets and negative electrode sheets to the stacking table; a film laying mechanism, which is movably arranged above the stacking table, the film laying mechanism is suitable for grabbing the diaphragm, and reciprocating along the feeding direction of the film laying mechanism above the stacking table; a material unloading and conveying mechanism, which is movably arranged on the side of the stacking table, and is suitable for conveying and unloading the stacked battery cells; a hot cutting mechanism, a gluing mechanism and a hot pressing mechanism, which are arranged on the moving path of the material unloading and conveying mechanism, and the material unloading and conveying mechanism passes through the hot cutting mechanism, the gluing mechanism and the hot pressing mechanism during the unloading movement process.

[0007] Optionally, the diaphragm feeding mechanism includes a first diaphragm feeding mechanism and a second diaphragm feeding mechanism, the first diaphragm feeding mechanism and the second diaphragm feeding mechanism are respectively located on both sides of the stacking table along the first direction, and the film laying mechanism is suitable for moving between the first diaphragm feeding mechanism and the second diaphragm feeding mechanism along the first direction.

[0008] Optionally, the film laying mechanism includes a support frame, a first film clamping structure is provided on the side of the support frame facing the first diaphragm feeding mechanism, and a second film clamping structure is provided on the side of the support frame facing the second diaphragm feeding mechanism. Both the first film clamping structure and the second film clamping structure are openable and closable structures. The first film clamping structure is suitable for grabbing the diaphragm of the first diaphragm feeding mechanism, and the second film clamping structure is suitable for grabbing the diaphragm of the second diaphragm feeding mechanism.

[0009] Optionally, a first cutting structure is provided on the first diaphragm feeding mechanism, and a second cutting structure is provided on the second diaphragm feeding mechanism. When the film laying mechanism moves close to the second diaphragm feeding mechanism, the first cutting structure cuts the diaphragm, and when the film laying mechanism moves close to the first diaphragm feeding mechanism, the second cutting structure cuts the diaphragm.

[0010] Optionally, the diaphragm feeding mechanism is arranged on the side of the stacking table along the first direction, the film laying mechanism includes a roller, and a film clamping structure is arranged on the roller. The roller can grab the diaphragm through the film clamping structure and drive the diaphragm to rotate around the central axis of the roller in two directions. The film laying mechanism has a first film laying position close to the diaphragm feeding mechanism and a second film laying position away from the diaphragm feeding mechanism. During the process of the film laying mechanism moving from the first film laying position to the second film laying position, the roller rotates in the first circumferential direction to wind the diaphragm outside the roller for caching. During the process of the film laying mechanism moving from the second film laying position to the first film laying position, the roller rotates in the second circumferential direction to release the diaphragm.

[0011] Optionally, the lamination device also includes a first clamping structure and a second clamping structure suitable for clamping the diaphragm, and a first cutting structure and a second cutting structure suitable for cutting the diaphragm, the first clamping structure and the first cutting structure are arranged at the first film laying position, and the second clamping structure and the second cutting structure are arranged at the second film laying position.

[0012] Optionally, the positive electrode sheet feeding mechanism includes a positive electrode strip unwinding mechanism and a positive electrode sheet making mechanism, and the negative electrode sheet feeding mechanism includes a negative electrode strip unwinding mechanism and a negative electrode sheet making mechanism. The positive electrode strip unwinding mechanism is suitable for unwinding the positive electrode strip to the positive electrode sheet making mechanism, and the positive electrode sheet making mechanism is suitable for cutting the positive electrode strip into multiple positive electrode sheets and providing positive electrode sheets to the lamination table. The negative electrode strip unwinding mechanism is suitable for unwinding the negative electrode strip to the negative electrode sheet making mechanism, and the negative electrode sheet making mechanism is suitable for cutting the negative electrode strip into multiple negative electrode sheets and providing negative electrode sheets to the lamination table. The positive electrode sheet making mechanism and the negative electrode sheet making mechanism are respectively located on both sides of the lamination table along the second direction, the positive electrode strip unwinding mechanism is located on the side of the positive electrode sheet making mechanism along the first direction, the negative electrode strip unwinding mechanism is located on the side of the negative electrode sheet making mechanism along the first direction, and the diaphragm feeding mechanism is located between the positive electrode sheet feeding mechanism and the negative electrode sheet feeding mechanism.

[0013] Optionally, the positive electrode sheet making mechanism and the negative electrode sheet making mechanism both include: a fixed table extending along a first direction; a sliding cutting table extending along the first direction and slidably disposed on the fixed table, the sliding cutting table being suitable for receiving the positive electrode material strip or the negative electrode material strip, and making the positive electrode material strip or the negative electrode material strip slide synchronously with the sliding cutting table relative to the fixed table, the sliding cutting table having a first position and a second position; a cutting structure fixedly disposed above the fixed table, wherein, in the process of the sliding cutting table moving from the first position to the second position, the sliding cutting table drives the positive electrode material strip or the negative electrode material strip through the cutting structure, and the cutting structure cuts the positive electrode material strip or the negative electrode material strip into multiple positive electrode sheets or multiple negative electrode sheets.

[0014] Optionally, an adsorption structure is provided on the fixed table, and adsorption holes are provided on the sliding cutting table. When the sliding cutting table moves from the first position to the second position, the sliding cutting table passes through the adsorption structure.

[0015] Optionally, the positive electrode sheet making mechanism and the negative electrode sheet making mechanism both include: a fixed table extending along a first direction; a sliding cutting table extending along the first direction and slidably disposed on the fixed table, the sliding cutting table being suitable for receiving the positive electrode material strip or the negative electrode material strip, and making the positive electrode material strip or the negative electrode material strip slide synchronously with the sliding cutting table relative to the fixed table, the sliding cutting table having a first position and a second position; a cutting structure movably disposed above the fixed table along the first direction, wherein after the sliding cutting table moves from the first position to the second position, the cutting structure moves along the extension direction of the positive electrode material strip or the negative electrode material strip, and cuts the positive electrode material strip or the negative electrode material strip into a plurality of positive electrode sheets or a plurality of negative electrode sheets.

[0016] Optionally, the lamination device also includes a feeding structure, which is suitable for conveying positive electrode material strips or negative electrode material strips. A clamping structure is provided at the end of the sliding cutting table. When the sliding cutting table is in the first position, the clamping structure is located at the front side of the feeding structure, and the clamping structure is suitable for clamping the positive electrode material strip or negative electrode material strip conveyed by the feeding structure.

[0017] Optionally, the positive electrode sheet making mechanism and the negative electrode sheet making mechanism both include: a fixed table extending along a first direction, a clamping structure being provided at the end of the fixed table; a feeding structure slidably provided on the fixed table along the first direction, the feeding structure being suitable for conveying the positive electrode material strip or the negative electrode material strip, the feeding structure having a first position and a second position; a cutting structure movably provided above the fixed table along the first direction, wherein after the feeding structure moves from the first position to the second position, the clamping structure is located at the front side of the feeding structure and clamps the positive electrode material strip or the negative electrode material strip conveyed by the feeding structure, and then after the feeding structure retracts to the second position, the cutting structure moves along the extension direction of the positive electrode material strip or the negative electrode material strip, and cuts the positive electrode material strip or the negative electrode material strip into multiple positive electrode sheets or multiple negative electrode sheets.

[0018] Optionally, a dust removal structure is provided on the fixing platform, and the dust removal structure is provided below the cutting structure.

[0019] Optionally, the cutting structure comprises a laser.

[0020] Optionally, the stacking device also includes a loading and conveying mechanism, which is arranged above the stacking table, and the loading and conveying mechanism is suitable for reciprocating along the second direction between the positive electrode sheet feeding mechanism and the negative electrode sheet feeding mechanism to convey the positive electrode sheet to the stacking table, or to convey the negative electrode sheet to the stacking table.

[0021] Optionally, the loading and handling mechanism includes a mounting frame, and a first grasping structure and a second grasping structure mounted on the mounting frame, the mounting frame having a first handling position and a second handling position, when the mounting frame is in the first handling position, the first grasping structure is located above the positive electrode sheet feeding mechanism, and the second grasping structure is located above the stacking table, when the mounting frame is in the second handling position, the first grasping structure is located above the stacking table, and the second grasping structure is located above the negative electrode sheet feeding mechanism.

[0022] Optionally, the first gripping structure and the second gripping structure each include a plurality of adsorption plates arranged in sequence, and the loading and transporting mechanism also includes a variable distance structure, which is arranged on the mounting frame and is suitable for changing the distance between adjacent adsorption plates.

[0023] Optionally, the hot cutting mechanism, the gluing mechanism and the hot pressing mechanism are arranged in sequence along the cutting direction of the battery cell, or the gluing mechanism, the hot cutting mechanism and the hot pressing mechanism are arranged in sequence along the cutting direction of the battery cell.

[0024] Optionally, the material unloading and handling mechanism includes: a linear guide rail extending along a first direction, the linear guide rail passing through a hot cutting mechanism, a gluing mechanism and a hot pressing mechanism; a sliding frame slidably arranged on the linear guide rail, a plurality of clamps fixedly arranged on the sliding frame, the clamps being suitable for clamping the battery cells; a linear drive mechanism, suitable for driving the sliding frame to move back and forth on the linear guide rail.

[0025] Optionally, the hot pressing mechanism includes a conveying belt and a hot pressing box arranged on a conveying path of the conveying belt, and the conveying path of the linear guide rail is butted against an end of the conveying belt.

[0026] The present invention also provides a battery production line, comprising the above-mentioned stacking device.

[0027] The present invention has the following advantages:

[0028] By utilizing the technical solution of the present invention, when the lamination device is laminating, the positive electrode sheet feeding mechanism provides positive electrode sheets to the lamination table, the film laying mechanism grabs the diaphragm provided by the diaphragm feeding mechanism and lays the diaphragm in one direction, and then the negative electrode sheet feeding mechanism provides negative electrode sheets to the lamination table, and the film laying mechanism lays the diaphragm in another opposite direction, that is, the film laying mechanism performs reciprocating diaphragm laying, thereby realizing reciprocating lamination of positive sheets, diaphragms and negative electrode sheets. In the above structure, on the one hand, the film laying mechanism is light in weight and can realize high-speed reciprocating movement, greatly improving the lamination efficiency; on the other hand, the lamination table and the diaphragm feeding mechanism are both fixedly arranged, that is, the two do not move in a plane, thereby reducing the overall occupied space of the lamination device. The positive electrode sheet feeding mechanism, the negative electrode sheet feeding mechanism and the diaphragm feeding mechanism are arranged around the outside of the lamination table, so that each mechanism is compactly arranged, and the miniaturization of the lamination device can be realized. In addition, the material handling mechanism can use the hot cutting mechanism, the gluing mechanism and the hot pressing mechanism during the process of carrying the battery cell materials, that is, one handling mechanism can complete all the subsequent processing of the battery cell by transferring the battery cell materials once, so that the subsequent processing speed of the battery cell is fast, and the stacking speed of the upstream is not affected, thereby improving production efficiency. In addition, the battery cell does not need to be transferred in each section of the material handling process, and the auxiliary time is short, and the damage to the battery cell caused by the handling mechanism of the battery cell and the handling process is reduced, thereby improving production efficiency and battery cell quality. Therefore, the technical solution of the present invention solves the defects of low stacking efficiency and large space occupied by the stacking machine in the prior art. 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 A schematic diagram showing the distribution of various mechanisms of an embodiment of a lamination device of the present invention is shown;

[0031] Figure 2 Shows Figure 1 A schematic diagram showing the distribution of the lamination platform, diaphragm feeding mechanism, film laying mechanism and material loading and transporting mechanism of the middle lamination device;

[0032] Figure 3 Shows Figure 1 A schematic diagram of the structure of the lamination table, diaphragm feeding mechanism and film laying mechanism of the middle lamination equipment;

[0033] Figure 4 Shows Figure 1 Structural schematic diagram of the diaphragm feeding mechanism and the film laying mechanism of the middle lamination equipment;

[0034] Figure 5 Shows Figure 5 A three-dimensional schematic diagram of one side of the middle film feeding mechanism and the film laying mechanism;

[0035] Figure 6 Shows Figure 1 A schematic diagram of the structure of the film laying mechanism of the middle lamination device;

[0036] Figure 7 Shows Figure 1 A schematic structural diagram of another embodiment of a diaphragm feeding mechanism and a film laying mechanism of a lamination device;

[0037] Figure 8 Shows Figure 7 A schematic diagram of the middle film laying mechanism moving from a first film laying position to a second film laying position;

[0038] Fig. 9 Shows Figure 7 A schematic diagram of the structure in which the first cutting structure and the second cutting structure cut off the diaphragm;

[0039] Fig.10 Shows Figure 7 Schematic diagram of the middle film laying mechanism being in the second film laying position;

[0040] Fig.11 Shows Figure 7 Schematic diagram of the middle film laying mechanism moving from the second film laying position to the first film laying position;

[0041] Fig.12 Shown include Figure 7 A schematic diagram of the distribution of various mechanisms of another embodiment of a lamination device of a diaphragm feeding mechanism and a film laying mechanism;

[0042] Fig.13 Shows Figure 1 A schematic structural diagram of a positive electrode sheet making mechanism or a negative electrode sheet making mechanism of a middle lamination device when the sliding cutting table is in a first position;

[0043] Fig.14 Shows Fig.13 The enlarged schematic diagram at A in the middle;

[0044] Fig.15 Shows Figure 1 A schematic structural diagram of a positive electrode sheet making mechanism or a negative electrode sheet making mechanism of a middle lamination device when the sliding cutting table is in the second position;

[0045] Fig.16 Shows Fig.15 The enlarged schematic diagram of point B in the middle;

[0046] Fig.17Shows Figure 1 A schematic diagram of the structure of a sliding cutting table of a positive electrode sheet making mechanism or a negative electrode sheet making mechanism of a middle lamination device;

[0047] Fig.18 Shows Figure 1 A structural schematic diagram of another embodiment of a positive electrode sheet making mechanism or a negative electrode sheet making mechanism of a middle lamination device;

[0048] Fig.19 Shows Fig.18 The enlarged schematic diagram at C in the middle;

[0049] Fig. 20 Shows Fig.18 The enlarged schematic diagram at D in the middle;

[0050] Fig.21 Shows Fig.18 Schematic diagram of the process of the middle feeding structure laying the pole piece strip on the fixed table;

[0051] Fig. 22 Shows Figure 1 A schematic diagram of the structure of the positive electrode material strip unwinding mechanism and the negative electrode material strip unwinding mechanism of the middle lamination equipment;

[0052] Fig.23 Shows Figure 1 A schematic diagram of the structure of the loading and handling mechanism of the middle lamination equipment;

[0053] Fig.24 Shows Fig.23 A schematic diagram of the structure of the adsorption plate of the feeding and handling mechanism;

[0054] Fig.25 Shows Figure 1 A schematic diagram of the structure of the material unloading and handling mechanism of the middle lamination equipment;

[0055] Fig.26 Shows Fig.25 A schematic diagram of the structure of the clamping jaws of the middle and lower material handling mechanism;

[0056] Fig. 27 Shows Figure 1 A schematic diagram of the structure of the hot cutting mechanism of the middle lamination device;

[0057] Fig.28 Shows Figure 1 Structural schematic diagram of the glue laminating equipment in the middle lamination equipment;

[0058] Fig.29 Shows Figure 1 Schematic diagram of the structure of the hot pressing mechanism of the medium lamination equipment.

[0059] Description of reference numerals:

[0060] 10. Laminating table; 20. Positive electrode sheet feeding mechanism; 21. Positive electrode material strip unwinding mechanism; 22. Positive electrode sheet making mechanism; 30. Negative electrode sheet feeding mechanism; 31. Negative electrode material strip unwinding mechanism; 32. Negative electrode sheet making mechanism; 40. Diaphragm feeding mechanism; 41. First diaphragm feeding mechanism; 42. Second diaphragm feeding mechanism; 50. Film laying mechanism; 51. Support frame; 52. First film clamping structure; 53. Second film clamping structure; 54. Film clamping structure; 55. First clamping structure; 56. Second clamping structure; 57. First cutting structure; 58. Second cutting structure; 61. Fixed table; 62, sliding cutting table; 621, adsorption hole; 63, cutting structure; 64, adsorption structure; 65, feeding structure; 66, clamping structure; 67, dust removal structure; 70, loading and transporting mechanism; 71, mounting frame; 72, first grabbing structure; 73, second grabbing structure; 74, adsorption plate; 75, variable pitch structure; 90, unloading and transporting mechanism; 91, linear guide rail; 92, sliding frame; 93, clamping claw; 94, linear drive mechanism; 100, hot pressing mechanism; 101, conveyor belt; 102, hot pressing box; 110, hot cutting mechanism; 120, gluing mechanism. DETAILED DESCRIPTION

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] like Figure 1 As shown, an embodiment of the stacking device according to the present application includes a stacking platform 10, a diaphragm feeding mechanism 40, a positive electrode sheet feeding mechanism 20, a negative electrode sheet feeding mechanism 30, a film laying mechanism 50, a material unloading and conveying mechanism 90, a hot cutting mechanism 110, a gluing mechanism 120 and a hot pressing mechanism 100. Among them, the stacking platform 10 is fixedly arranged. The diaphragm feeding mechanism 40 is fixedly arranged and is suitable for providing a diaphragm to the stacking platform 10. The positive electrode sheet feeding mechanism 20 and the negative electrode sheet feeding mechanism 30 are respectively suitable for providing positive electrode sheets and negative electrode sheets to the stacking platform 10. The film laying mechanism 50 is movably arranged above the stacking platform 10, and the film laying mechanism 50 is suitable for grabbing the diaphragm and reciprocating along the feeding direction of the film laying mechanism 50 above the stacking platform 10. The material unloading and conveying mechanism 90 is movably arranged on the side of the stacking platform 10, and is suitable for conveying and unloading the stacked battery cells. The hot cutting mechanism 110 , the gluing mechanism 120 and the hot pressing mechanism 100 are arranged on the moving path of the material unloading and conveying mechanism 90 , and the material unloading and conveying mechanism 90 passes through the hot cutting mechanism 110 , the gluing mechanism 120 and the hot pressing mechanism 100 during the unloading and moving process.

[0066] Using the technical solution of this embodiment, when the laminating device performs lamination, the positive electrode sheet feeding mechanism 20 provides positive electrode sheets to the laminating platform 10, the film laying mechanism 50 grabs the diaphragm provided by the diaphragm feeding mechanism 40 and lays the diaphragm in one direction, and then the negative electrode sheet feeding mechanism 30 provides negative electrode sheets to the laminating platform 10, and the film laying mechanism 50 lays the diaphragm in another opposite direction, that is, the film laying mechanism 50 performs reciprocating diaphragm laying, thereby realizing the reciprocating lamination of positive sheets, diaphragms and negative sheets. In the above structure, on the one hand, the film laying mechanism 50 is light in weight and can realize high-speed reciprocating movement, greatly improving the lamination efficiency; on the other hand, the laminating platform 10 and the diaphragm feeding mechanism 40 are both fixedly arranged, that is, the two do not move in a plane, thereby reducing the overall occupied space of the laminating device. The positive electrode sheet feeding mechanism 20, the negative electrode sheet feeding mechanism 30 and the diaphragm feeding mechanism 40 are arranged around the laminating platform 10, so that each mechanism is compactly arranged, and the laminating device can be miniaturized. In addition, during the process of moving the battery cell materials, the material handling mechanism 90 can pass through the hot cutting mechanism 110, the gluing mechanism 120 and the hot pressing mechanism 100, that is, one handling mechanism can complete all the subsequent processing of the battery cell by transferring the battery cell materials once, so that the subsequent processing speed of the battery cell is fast, and the stacking speed of the upstream is not affected, thereby improving production efficiency. In addition, the battery cell does not need to be transferred in each section of the material handling process, and the auxiliary time is short, and the damage to the battery cell caused by the handling mechanism of the battery cell and the handling process is reduced, thereby improving production efficiency and battery cell quality. Therefore, the technical solution of this embodiment solves the defects of low stacking efficiency and large space occupied by the stacking machine in the prior art.

[0067] It should be noted that, in order to facilitate the description of the arrangement positions of the various mechanisms in the lamination device of this embodiment, the first direction is defined as follows: Figure 1 and Figure 2 The left and right directions in the second direction are Figure 1 and Figure 2 Therefore, the feeding direction of the above-mentioned diaphragm feeding mechanism 40 refers to the first direction.

[0068] In order to better understand the working process of the stacking device of this embodiment, the various mechanisms of the stacking device of this application are introduced below using the processing process of the battery cell as a path.

[0069] 1. Unwinding of positive and negative electrode tapes

[0070] like Figure 1 and Fig. 22 As shown, in the technical solution of this embodiment, the positive electrode sheet feeding mechanism 20 includes a positive electrode material strip unwinding mechanism 21, and the negative electrode sheet feeding mechanism 30 includes a negative electrode material strip unwinding mechanism 31. The positive electrode material strip unwinding mechanism 21 is suitable for unwinding the positive electrode material strip from the positive electrode sheet making mechanism 22, and the negative electrode material strip unwinding mechanism 31 is suitable for unwinding the negative electrode material strip from the negative electrode sheet making mechanism 32.

[0071] like Fig. 22 As shown, the positive electrode material strip unwinding mechanism 21 is used to unwind the rolled positive electrode material strip into a strip material for subsequent processing. The positive electrode material strip includes a positive electrode foil and a positive electrode slurry coated on the positive electrode foil. One side of the positive electrode foil is not coated with the positive electrode slurry, thereby forming a positive electrode ear cutting area (empty foil area).

[0072] like Fig. 22 As shown, the negative electrode material strip unwinding mechanism 31 is used to unwind the rolled negative electrode material strip into a strip material for subsequent processing. The negative electrode material strip includes a negative electrode foil and a negative electrode slurry coated on the negative electrode foil. One side of the negative electrode foil is not coated with the positive electrode slurry, thereby forming a negative electrode ear cutting area (empty foil area).

[0073] Of course, in some embodiments not shown, the lamination device may not include the positive electrode material strip unwinding mechanism 21 and the negative electrode material strip unwinding mechanism 31. In such an embodiment not shown, the positive electrode material strip and the negative electrode material strip may be unwound by an external unwinding mechanism, and then the strip material may be directly passed into the lamination device.

[0074] like Figure 1 As shown, the positive electrode material strip unwinding mechanism 21 and the negative electrode material strip unwinding mechanism 31 in this embodiment are arranged at the following positions: along the first direction, the positive electrode material strip unwinding mechanism 21 and the negative electrode material strip unwinding mechanism 31 are located on one side of the lamination platform 10, specifically, both are located on the lamination platform 10. Figure 1 Along the second direction, the positive electrode material strip unwinding mechanism 21 and the negative electrode material strip unwinding mechanism 31 are respectively located on both sides of the lamination platform 10. Specifically, the positive electrode material strip unwinding mechanism 21 is located on the left side of the lamination platform 10. Figure 1 The negative electrode material strip unwinding mechanism 31 is located at the upper side of the lamination table 10. Figure 1 The lower position shown (of course, the upper and lower positions of the two can be reversed). And further, along the second direction, the positive electrode material strip unwinding mechanism 21 and the negative electrode material strip unwinding mechanism 31 are arranged opposite to each other.

[0075] like Fig. 22 As shown, the structures of the positive electrode material strip unwinding mechanism 21 and the negative electrode material strip unwinding mechanism 31 are roughly the same, and both include a vertical plate, on which a driving roller, a passing roller, a tensioning roller, a deviation correction mechanism, etc. can be arranged. Fig. 22 It can also be seen that the vertical plate of the positive electrode material strip unwinding mechanism 21 and the vertical plate of the negative electrode material strip unwinding mechanism 31 are arranged opposite to each other, and the positive electrode material strip unwinding mechanism 21 and the negative electrode material strip unwinding mechanism 31 are arranged roughly in mirror symmetry.

[0076] 2. Production of positive and negative electrodes

[0077] After the positive electrode material strip and the negative electrode material strip are unwound, the positive electrode material strip needs to be processed into a positive electrode sheet, and the negative electrode material strip needs to be processed into a negative electrode sheet. Therefore, in this embodiment, the positive electrode sheet feeding mechanism 20 also includes a positive electrode sheet making mechanism 22, and the negative electrode sheet feeding mechanism 30 also includes a negative electrode sheet making mechanism 32. The positive electrode sheet making mechanism 22 is suitable for cutting the positive electrode material strip into a plurality of positive electrode sheets, and providing positive electrode sheets to the lamination platform 10. The negative electrode sheet making mechanism 32 is suitable for cutting the negative electrode material strip into a plurality of negative electrode sheets, and providing negative electrode sheets to the lamination platform 10.

[0078] like Figure 1 As shown, after the positive electrode material strip unwinding mechanism 21 unwinds the positive electrode material strip, it is passed to the positive electrode sheet making mechanism 22, and the positive electrode sheet making mechanism 22 cuts the positive electrode material strip into a plurality of positive electrode sheets, which are used for subsequent lamination. After the negative electrode material strip unwinding mechanism 31 unwinds the negative electrode material strip, it is passed to the negative electrode sheet making mechanism 32, and the negative electrode sheet making mechanism 32 cuts the negative electrode material strip into a plurality of negative electrode sheets, which are used for subsequent lamination.

[0079] like Figure 1 As shown, the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 are arranged in such a manner that along the first direction, the positive electrode sheet making mechanism 22 is arranged adjacent to the positive electrode material strip unwinding mechanism 21. Specifically, the positive electrode sheet making mechanism 22 is located at the positive electrode material strip unwinding mechanism 21. Figure 1 In the first direction, the negative electrode sheet making mechanism 32 is arranged adjacent to the negative electrode material strip unwinding mechanism 31. Specifically, the negative electrode sheet making mechanism 32 is located at the negative electrode material strip unwinding mechanism 31. Figure 1 In the second direction, the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 are respectively located on both sides of the lamination platform 10. Specifically, the positive electrode sheet making mechanism 22 is located on the right side of the lamination platform 10. Figure 1 The negative electrode sheet making mechanism 32 is located at the top of the lamination table 10. Figure 1 Directly below the position shown.

[0080] Furthermore, since the structures of the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 are substantially the same, the structures of the two are described together below. In addition, in this embodiment, the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 include three embodiments, which are described in detail below in turn:

[0081] Embodiment 1

[0082] like Figures 13 to 17As shown, in the technical solution of this embodiment, the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 both include a fixed table 61, a sliding cutting table 62 and a cutting structure 63. The sliding cutting table 62 is slidably arranged on the fixed table 61, and the sliding cutting table 62 is suitable for receiving the positive electrode material strip or the negative electrode material strip, and making the positive electrode material strip or the negative electrode material strip and the sliding cutting table 62 slide synchronously relative to the fixed table 61. The cutting structure 63 is arranged above the fixed table 61.

[0083] Furthermore, the sliding cutting table 62 has a first position and a second position. When the sliding cutting table 62 moves from the first position to the second position, the sliding cutting table 62 drives the positive electrode material strip or the negative electrode material strip to pass through the cutting structure 63, and the cutting structure 63 cuts the positive electrode material strip or the negative electrode material strip into a plurality of positive electrode sheets or a plurality of negative electrode sheets.

[0084] Specifically, in this embodiment, the fixed table 61 is fixedly arranged, that is, the fixed table 61 does not move. The fixed table 61 is in a long strip structure, and the fixed table 61 extends along the first direction. The sliding cutting table 62 is also in a long strip shape, and the sliding cutting table 62 also extends along the first direction. The sliding cutting table 62 is slidably arranged on the fixed table 61, and the length of the fixed table 61 is greater than that of the sliding cutting table 62, so as to ensure that the sliding cutting table 62 does not fall off the fixed table 61 when the sliding cutting table 62 is in the first position or the second position.

[0085] like Fig.13 and Fig.15 As shown, the sliding cutting table 62 has a first position and a second position on the fixed table 61. Fig.13 and Fig.15 When the sliding cutting table 62 is in the first position, the sliding cutting table 62 is in the right position of the fixed table 61. Fig.14 It can be seen that when the sliding cutting table 62 is in the first position, the front end (i.e. Fig.13 The left end shown in the figure) is located at the right side of the cutting structure 63. Fig.16 It can also be seen that when the sliding cutting table 62 is in the second position, most (or all) of the sliding cutting table 62 is located on the right side of the cutting structure 63 to ensure that all the pole pieces on the material strip can be cut.

[0086] Based on the above structure, the working process of the sliding cutting table 62 is described below by taking the cutting of the positive electrode sheet with the positive electrode strip as an example:

[0087] 1. The sliding cutting table 62 moves to the first position and receives the positive electrode material strip;

[0088] 2. The sliding cutting table 62 slides from the first position to the second position. During the sliding process, the positive electrode material strip moves synchronously with the sliding cutting table 62, and the positive electrode material strip is cut by the cutting structure 63;

[0089] 3. The sliding cutting table 62 moves to the second position, and the cutting structure 63 cuts the plurality of positive electrode sheets;

[0090] 4. The loading and transporting mechanism 70 transports the plurality of positive electrode sheets to the stacking table 10 for stacking;

[0091] 5. The sliding cutting table 62 moves from the second position back to the first position.

[0092] The above steps 1 to 5 are repeated repeatedly to realize the cyclic production of positive electrode sheets.

[0093] In the laminating machine in the prior art, the pole piece material belt is usually transferred to the bottom of the cutting structure (hardware die cutting, laser cutting, etc.) by a conveyor belt. The problems with the conveyor belt include: the belt has the problem of slipping, so it is difficult to ensure the position accuracy of the pole piece material belt moving to the bottom of the cutting structure. In the prior art, a CCD camera and a deviation correction station are usually set before or after the pole piece cutting to ensure the position accuracy of the pole piece, but this will increase the space occupied and the cost of the equipment; in addition, the transmission speed of the conveyor belt is limited, which limits the beat of the lamination.

[0094] like Fig.17 As shown, it should be emphasized that in this embodiment, the sliding cutting table 62 is slidably arranged on the fixed table 61, and the sliding of the sliding cutting table 62 can be achieved by a linear module. That is, a linear module is arranged on the fixed table 61, and the sliding cutting table 62 is connected to the linear module. Such a setting has at least the following advantages:

[0095] 1. The linear module has high moving accuracy, ensuring that the pole piece strip is accurately moved to the cutting position. There is no need to set up CCD cameras and deviation correction stations upstream and downstream of the fixed table, saving equipment space and cost;

[0096] 2. The linear module has a fast response and can quickly drive the pole piece strip to the cutting position, realizing high-speed cycle production and matching the subsequent high-speed lamination.

[0097] like Figures 13 to 16 As shown, in the technical solution of this embodiment, a suction structure 64 is provided on the fixed platform 61, and a suction hole 621 is provided on the sliding cutting platform 62. The sliding cutting platform 62 passes through the suction structure 64 during the process of moving from the first position to the second position.

[0098] Specifically, the adsorption structure 64 can be fed with negative pressure, and the negative pressure can be transmitted to the upper surface of the sliding cutting table 62 through the adsorption holes 621. When the sliding cutting table 62 moves from the first position to the second position, the pole piece strip is cut and divided into a plurality of pole pieces. Since the upper surface of the sliding cutting table 62 is fed with negative pressure through the adsorption holes 621, it can be ensured that the plurality of pole pieces after cutting are adsorbed and fixed on the upper surface of the sliding cutting table 62, that is, the pole pieces after cutting can also move synchronously with the sliding cutting table 62.

[0099] like Fig.14 and Fig.16 As shown, in the technical solution of this embodiment, a feeding structure 65 is provided on the fixed table 61, and the feeding structure 65 is suitable for conveying positive electrode material strips or negative electrode material strips. A clamping structure 66 is provided at the end of the sliding cutting table 62. When the sliding cutting table 62 is in the first position, the clamping structure 66 is located in front of the feeding structure 65, and the clamping structure 66 is suitable for clamping the positive electrode material strips or negative electrode material strips conveyed by the feeding structure 65.

[0100] Taking the cutting of the positive electrode sheet as an example, the positive electrode material strip unwinding mechanism 21 unwinds the material strip and passes it into the feeding structure 65. Fig.14 and Fig.16 It can be seen that the feeding structure 65 is arranged on the side of the cutting structure 63 facing the first position, and the fixed feeding structure 65 is fixedly arranged on the fixed platform 61 .

[0101] Furthermore, the feeding structure 65 may include a driving roller and a deflection-correcting roller. The driving roller can drive the positive electrode material strip to move forward, and the deflection-correcting roller can ensure that the positive electrode material strip is accurately input to the sliding cutting table 62 .

[0102] like Fig.14 As shown, when the sliding cutting table 62 is in the first position, the material clamping structure 66 is located at the front side of the feeding structure 65, that is, Fig.14 The feeding structure 65 is shown as facing the second position, and the two are arranged close to each other. At this time, the clamping structure 66 can clamp the positive electrode material strip on the feeding structure 65, and this action is performed in the above step 1. When the sliding cutting table 62 moves from the first position to the second position, the clamping structure 66 can pull the positive electrode material strip outward, thereby achieving synchronous movement of the positive electrode material strip and the sliding cutting table 62.

[0103] Furthermore, a cutting structure (such as a cutter) can be provided on the feeding structure 65. When the sliding cutting table 62 moves to the second position, the cutting structure cuts the positive electrode material strip to ensure that the last electrode sheet after cutting is separated from the upstream electrode sheet material strip (the cutting here can also be achieved by the cutting structure 63).

[0104] The following further details the cutting process:

[0105] During the initial movement stage of the sliding cutting table 62, that is, when the cutting structure 63 has not yet cut the first pole piece, the clamping structure 66 drives the pole piece material strip to move outward. When the cutting structure 63 has cut the first pole piece, the first pole piece is separated from the upstream pole piece material strip, so the clamping structure 66 can no longer drive the pole piece material strip to move. However, as mentioned above, negative pressure is introduced into the upper surface of the sliding cutting table 62 through the adsorption structure 64 and the adsorption hole 621, so the upstream pole piece material strip can be driven to move by the pole piece material strip adsorbed on the surface of the sliding cutting table 62. That is, in the process of the cutting structure 63 cutting the pole piece, the pole piece material strip can be driven by the adsorption force of the negative pressure to maintain synchronous movement with the sliding cutting table 62.

[0106] like Fig.14 , Fig.16 and Fig.17 As shown, a dust removal structure 67 is provided on the fixed platform 61, and the dust removal structure 67 is arranged below the cutting structure 63. Specifically, the dust removal structure 67 includes an air knife and a dust collecting structure, and the air knife and the dust collecting structure are respectively located on both sides of the fixed platform 61, and the two are arranged opposite to each other. The air knife can blow out positive pressure, thereby blowing up dust and material debris during the cutting process. The dust collecting structure has a dust collecting port, and negative pressure can be introduced into the dust collecting port, so that the above-mentioned dust and material debris can be collected by the dust collecting structure.

[0107] like Fig.14 and Fig.16 As shown, in the technical solution of this embodiment, the cutting structure 63 includes a laser. When the sliding cutting table 62 moves from the first position to the second position, the laser cuts the pole piece strip to form a plurality of pole pieces.

[0108] In some embodiments not shown, the cutting structure 63 may also be a metal die-cutting structure, that is, the cutting structure 63 may include a cutting knife.

[0109] The structure of the upper surface of the sliding cutting table 62 is described in detail below:

[0110] like Fig.14 and Fig.16 As shown, the upper surface of the sliding cutting table 62 is formed with a plurality of adjacent cutting positions, and the shape contour of each cutting position is adapted to the shape contour of the pole piece. The number of cutting positions matches the number of pole pieces that need to be produced at one time. For example, in this embodiment, twelve pole pieces are produced at one time, so the number of cutting positions is at least twelve (the cutting positions are set to twelve or more than twelve). The laser can cut the shape of the pole piece along the contour of the cutting position, including two side edges, a bottom edge, a top edge, and a pole ear located on the top edge. From Fig.14 and Fig.16It can also be seen that a plurality of the above-mentioned adsorption holes 621 are arranged at each cutting position. And because the area of ​​the tab portion is small, the distribution density of the adsorption holes 621 at the tab of the cutting position is greater than the distribution density of the adsorption holes 621 in the remaining portion.

[0111] Furthermore, there are some differences between the cutting position of the sliding cutting table 62 of the positive electrode sheet making mechanism 22 (hereinafter referred to as the first cutting position) and the cutting position of the sliding cutting table 62 of the negative electrode sheet making mechanism 32 (hereinafter referred to as the second cutting position). Specifically, since the positive electrode sheet and the negative electrode sheet are translated and transported to the lamination table 10 for lamination, the tab area of ​​the first cutting position and the tab area of ​​the second cutting position should be on the same side. And since the positive and negative tabs of the battery cell are symmetrically arranged along the middle, the first cutting position and the second area and the tab area of ​​the second cutting position are arranged in mirror symmetry.

[0112] Embodiment 2

[0113] The structure of the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 of the present application is basically the same as that of the first embodiment. Figures 13 to 17 The difference between the second embodiment of the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 and the first embodiment is that the cutting structure 63 is slidably disposed above the fixing table 61, and the electrode sheet cutting process is different.

[0114] Specifically, the cutting structure 63 can slide above the fixed platform 61 along the first direction, and the cutting structure 63 starts to move and cut the electrode strip only after the sliding cutting platform 62 is fixed at the second position. Therefore, taking the cutting of the positive electrode strip as an example, the cutting process of the sliding cutting platform 62 in the second embodiment is as follows:

[0115] 1. The sliding cutting table 62 moves to the first position and receives the positive electrode material strip;

[0116] 2. The sliding cutting table 62 slides from the first position to the second position. During the sliding process, the positive electrode material strip and the sliding cutting table 62 move synchronously;

[0117] 3. After the sliding cutting table 62 moves to the second position, the cutting structure 63 moves along the first direction and cuts a plurality of positive electrode sheets;

[0118] 4. The loading and transporting mechanism 70 transports the plurality of positive electrode sheets to the stacking table 10 for stacking;

[0119] 5. The sliding cutting table 62 moves from the second position back to the first position.

[0120] The advantage of the solution of the second embodiment over the first embodiment is that the cutting structure 63 does not cut the pole piece strip when the sliding cutting table 62 moves from the first position to the second position. Therefore, during the sliding of the sliding cutting table 62, the clamping structure 66 can always provide a pulling force to the pole piece strip, which makes it possible not to set the adsorption structure 64 on the fixed table 61, or to set the adsorption structure 64 with a lower adsorption force on the fixed table 61, so as to ensure that the pole piece strip does not shake on the sliding cutting table 62 when it is pulled out by the clamping structure 66.

[0121] Optionally, a linear module may be provided on the fixed platform 61 , and the cutting structure 63 is connected to the linear module, so that the cutting structure 63 can slide on the fixed platform 61 .

[0122] Furthermore, since the cutting structure 63 in the second embodiment is constantly moving during the process of cutting the pole piece strip, the cutting position is also constantly changing. The dust removal structure 67 in the second embodiment can be set to move synchronously with the cutting structure 63 to ensure that the dust and material debris after cutting at different positions can be collected. Alternatively, the dust removal structure 67 can also be set to a long strip shape, and when the sliding cutting table 62 is in the second position, the dust removal range of the dust removal structure 67 can cover all cutting positions.

[0123] The remaining structures of the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 of the second embodiment can refer to the above-mentioned first embodiment, so they are not described in detail again.

[0124] Embodiment 3

[0125] like Figures 18 to 20 As shown, the difference between the third embodiment of the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 of the present application and the above-mentioned embodiments and embodiments 1 and 2 is that the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32 only include a fixed table 61, and a sliding cutting table 62 is no longer provided.

[0126] Furthermore, a clamping structure 66 is provided at the end of the fixed platform 61, and a feeding structure 65 is provided to be slidably provided on the fixed platform 61, and the feeding structure 65 has a first position and a second position. The cutting structure 63 is also slidably provided above the fixed platform 61, which is consistent with the solution of the second embodiment.

[0127] Furthermore, after the feeding structure 65 moves from the first position to the second position, the clamping structure 66 is located at the front side of the feeding structure 65 and clamps the positive electrode material strip or the negative electrode material strip conveyed by the feeding structure 65, and then after the feeding structure 65 retracts to the second position, the cutting structure 63 moves along the extension direction of the positive electrode material strip or the negative electrode material strip and cuts the positive electrode material strip or the negative electrode material strip into multiple positive electrode sheets or multiple negative electrode sheets.

[0128] First of all, it should be noted that Fig.18 Two feeding structures 65 are shown in FIG. 1 , which is a schematic diagram of a feeding structure 65 being in two positions. The feeding structure 65 on the right is in the first position, and the feeding structure 65 on the left is in the second position. Fig.18 Two cutting structures 63 are shown, which schematically illustrate two extreme positions of a cutting structure during the cutting process. Fig.18 The content shown should not be understood as having two cutting structures 63 and two feeding structures 65 on the fixing table 61 .

[0129] like Fig.19 and Fig. 20 As shown, the feeding structure 65 of the third embodiment is basically the same as the first and second embodiments described above, and its function is to convey the positive electrode material strip or the negative electrode material strip. The difference is that the feeding structure 65 of the third embodiment can slide on the fixed table 61 along the first direction. When the feeding structure 65 slides from the first position to the second position, the electrode material strip can be laid on the upper surface of the fixed table 61. And when the feeding structure 65 slides to the second position, the clamping structure 66 on the fixed table 61 can clamp the electrode material strip conveyed by the feeding structure 65. Then the feeding structure 65 returns from the second position to the first position, that is, retreats.

[0130] Furthermore, the feeding structure 65 may include upper and lower clamping rods, one of which is driven by a driving mechanism to move up and down, so that the feeding structure 65 can clamp the pole piece strip or loosen the pole piece strip.

[0131] In the third embodiment, the fixing platform 61 lays the electrode strip as follows: Fig.21 As shown, Fig.21 The left side of the center is the second position and the right side is the first position. Fig.21 In the upper schematic diagram shown, the feeding structure 65 is in the first position and is waiting for the pole piece to be unloaded after the last cutting; Fig.21 In the middle schematic diagram shown, after the pole piece is cut last time, the feeding structure 65 clamps the pole piece strip and moves from the first position to the second position, and the clamping structure 66 clamps the end of the pole piece strip; Fig.21 In the lower schematic diagram shown, the feeding structure 65 releases the pole piece strip and retreats in the direction of the first position until it moves to the first position, completing the laying of the pole piece strip.

[0132] After the pole piece material strip is laid, the cutting structure 63 can be moved to cut the pole piece material strip to form a plurality of pole pieces, which is consistent with the solution of the second embodiment.

[0133] The technical solution of the third embodiment is compared with the first and second embodiments described above, in that, since the sliding cutting table 62 is no longer provided, the length of the fixed table 61 can be made shorter (the length of the fixed table 61 in the first and second embodiments needs to prevent the sliding cutting table from detaching when it is in the first position), and can be slightly longer than the total width of the plurality of pole pieces to be cut. Therefore, in the technical solution of the third embodiment, the total length of the lamination device along the first direction can be set to a smaller size, which is conducive to the further miniaturization design of the lamination device.

[0134] In addition, the upper surface of the fixed table 61 in the third embodiment is used as the cutting surface. Therefore, the structure of the upper surface of the fixed table 61 in the third embodiment can refer to the structure of the upper surface of the sliding cutting table 62 in the first and second embodiments, so it will not be repeated.

[0135] 3. Unwinding of diaphragm tape

[0136] In the present application, the diaphragm feeding mechanism 40 can be arranged in two ways, one is to arrange the diaphragm feeding mechanism 40 on both sides of the stacking table 10, and the other is to arrange the diaphragm feeding mechanism 40 only on one side of the stacking table 10, which is described in detail below.

[0137] Embodiment 1

[0138] like Figures 1 to 5 As shown, according to an embodiment of the diaphragm feeding mechanism 40 of the present application, the diaphragm feeding mechanism 40 includes a first diaphragm feeding mechanism 41 and a second diaphragm feeding mechanism 42. The first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42 are respectively located on both sides of the stacking table 10 along the first direction, and the film laying mechanism 50 is suitable for moving between the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42 along the first direction.

[0139] In this embodiment, the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42 are arranged at the following positions: along the first direction, the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42 are respectively located on both sides of the stacking platform 10. Specifically, the first diaphragm feeding mechanism 41 is located at the Figure 1 On the left side of the figure, the second diaphragm feeding mechanism 42 is located at the lamination table 10. Figure 1 Along the second direction, the first separator feeding mechanism 41 is located between the positive electrode sheet feeding mechanism 20 and the negative electrode sheet feeding mechanism 30 .

[0140] from Figure 1It can also be seen that the positive electrode sheet making mechanism 22, the negative electrode sheet making mechanism 32, the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42 are respectively arranged around the four sides of the stacking table 10, and the stacking table 10, the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42 are all fixed and do not move, so that the positions of the various mechanisms are compact and the layout is small, which greatly reduces the occupied volume of the stacking equipment.

[0141] like Figure 3 and Figure 4 As shown, the structures of the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42 are basically the same, and the two are arranged along the middle of the lamination table 10 in a mirror-symmetrical manner. Figure 5 The structure of the second diaphragm feeding mechanism 42 is shown, which includes a frame and a driving roller, a passing roller, a tensioning roller, a deviation-correcting roller, etc. arranged on the frame.

[0142] The first diaphragm feeding mechanism 41 can feed diaphragm in the direction of the second diaphragm feeding mechanism 42, and the second diaphragm feeding mechanism 42 can feed diaphragm in the direction of the first diaphragm feeding mechanism 41. The specific cooperation between the above-mentioned film laying mechanism 50 and the two will be explained in the following lamination part.

[0143] Embodiment 2

[0144] like Figure 7 and Fig.12 As shown, the difference between the second embodiment of the diaphragm feeding mechanism 40 of the present application and the first embodiment is that the diaphragm feeding mechanism 40 is only arranged on one side of the stacking platform 10. Specifically, the diaphragm feeding mechanism 40 is arranged on one side of the stacking platform 10 along the first direction and is located Fig.12 Left position as shown.

[0145] Since the laminating platform 10 is provided with the diaphragm feeding mechanism 40 only on one side in the second embodiment, the film laying mechanism 50 needs to be Fig.12 When the membrane is laid from left to right in the direction shown, the membrane returning is cached synchronously. Fig.12 When the membrane is laid from right to left in the direction shown, the membrane laying mechanism 50 releases the buffered membrane, thereby completing one reciprocating membrane laying. How the membrane laying mechanism 50 specifically implements this function will be described in detail in the following lamination part.

[0146] Compared with the above-mentioned embodiment 1, the diaphragm feeding mechanism 40 of the second embodiment is only provided on one side of the lamination table 10, so the total length of the lamination device along the first direction can be set to be smaller, which is conducive to further miniaturization of the lamination device.

[0147] 4. Lamination

[0148] During the lamination process, the positive sheet, the separator, and the negative electrode sheet need to be stacked back and forth to form a battery cell structure. The lamination in this embodiment is mainly achieved by the film laying mechanism 50 and the material loading and transporting mechanism 70, so the structures and working processes of the two are first described in detail:

[0149] (1) Film laying mechanism

[0150] The film laying mechanism 50 of the present application includes two embodiments, corresponding to the two embodiments of the above-mentioned diaphragm feeding mechanism 40, which are described in detail below.

[0151] Embodiment 1

[0152] The film laying mechanism 50 of the first embodiment is used to cooperate with the diaphragm feeding mechanism 40 of the first embodiment. Figure 1 As shown, the film laying mechanism 50 in this embodiment can be movably arranged above the laminating table 10 along the first direction, and the film laying mechanism 50 can reciprocate between the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42. The film laying mechanism 50 is used to lay the film on the laminating table 10 along the first direction. Figure 1 and Figure 2 The diaphragms are laid back and forth in the left-right direction (first direction) shown.

[0153] Specifically, when the film laying mechanism 50 moves to a position close to the first diaphragm feeding mechanism 41, the film laying mechanism 50 can grab the diaphragm released by the first diaphragm feeding mechanism 41, and then the film laying mechanism 50 moves toward the second diaphragm feeding mechanism 42 to achieve the laying of the diaphragm from left to right, until the film laying mechanism 50 moves to a position close to the second diaphragm feeding mechanism 42. When the film laying mechanism 50 moves to a position close to the second diaphragm feeding mechanism 42, the film laying mechanism 50 can grab the diaphragm released by the second diaphragm feeding mechanism 42, and then the film laying mechanism 50 moves toward the first diaphragm feeding mechanism 41 to achieve the laying of the diaphragm from right to left, until the film laying mechanism 50 moves to a position close to the first diaphragm feeding mechanism 41.

[0154] By reciprocating the above steps, the membrane laying mechanism 50 can achieve reciprocating laying of the membrane in the first direction.

[0155] Further, the first diaphragm feeding mechanism 41 is provided with a first cutting structure, and the second diaphragm feeding mechanism 42 is provided with a second cutting structure. When the film laying mechanism 50 moves close to the second diaphragm feeding mechanism 42, the first cutting structure cuts the diaphragm so that the end of the diaphragm facing the first diaphragm feeding mechanism 41 can fall on the stacking table 10. When the film laying mechanism 50 moves close to the first diaphragm feeding mechanism 41, the second cutting structure cuts the diaphragm so that the end of the diaphragm facing the second diaphragm feeding mechanism 42 can fall on the stacking table 10.

[0156] like Figure 6 and Figure 7 As shown, in the technical solution of this embodiment, the film laying mechanism 50 includes a support frame 51, a first film clamping structure 52 and a second film clamping structure 53. The first film clamping structure 52 is provided on the side of the support frame 51 facing the first diaphragm feeding mechanism 41, and the second film clamping structure 53 is provided on the side of the support frame 51 facing the second diaphragm feeding mechanism 42. Both the first film clamping structure 52 and the second film clamping structure 53 are openable and closable structures, the first film clamping structure 52 is suitable for grabbing the diaphragm of the first diaphragm feeding mechanism 41, and the second film clamping structure 53 is suitable for grabbing the diaphragm of the second diaphragm feeding mechanism 42.

[0157] Specifically, the support frame 51 is roughly in a "U"-shaped structure with an opening downward, which includes a top edge and two side edges. The first clamping structure 52 and the second clamping structure 53 are both clamping structures, and both are arranged on the top edge of the support frame 51. The first clamping structure 52 and the second clamping structure 53 can be controlled to open and close by a driving mechanism (such as a linear motor, a lead screw nut, etc.), so that the first clamping structure 52 can clamp the diaphragm released by the first diaphragm feeding mechanism 41, or release the diaphragm released by the first diaphragm feeding mechanism 41, and the second clamping structure 53 can clamp the diaphragm released by the second diaphragm feeding mechanism 42, or release the diaphragm released by the second diaphragm feeding mechanism 42.

[0158] from Figure 6 It can also be seen that the lamination device further includes two guide rails, which extend along the first direction and are arranged between the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42. The two guide rails are arranged opposite to each other and are respectively located on both sides of the lamination table 10. The two sides of the above-mentioned support frame 51 are respectively connected to the two guide rails, and the support frame 51 can move quickly on the guide rails through a linear mechanism.

[0159] In this embodiment, the film laying mechanism 50 has a simple structure and is light in weight. It can realize high-speed reciprocating movement between the first diaphragm feeding mechanism 41 and the second diaphragm feeding mechanism 42, and cooperate with the above-mentioned high-speed cycle film production. Therefore, the stacking device in this embodiment greatly improves the stacking speed and stacking efficiency.

[0160] Embodiment 2

[0161] The film laying mechanism 50 of the second embodiment is used to cooperate with the membrane feeding mechanism 40 of the second embodiment. Figures 7 to 11 As shown, the membrane feeding mechanism 40 is arranged along the first direction on the side of the laminating platform 10. The film laying mechanism 50 includes a roller, on which a film clamping structure 54 is arranged, and the roller can grab the membrane through the film clamping structure 54 and drive the membrane to rotate around the central axis of the roller in two directions.

[0162] Furthermore, the film laying mechanism 50 has a first film laying position close to the diaphragm feeding mechanism 40 and a second film laying position away from the diaphragm feeding mechanism 40. When the film laying mechanism 50 moves from the first film laying position to the second film laying position, the winding roller rotates in the first circumferential direction to wind the diaphragm outside the winding roller for buffering. When the film laying mechanism 50 moves from the second film laying position to the first film laying position, the winding roller rotates in the second circumferential direction to release the diaphragm.

[0163] Specifically, the film laying mechanism 50 of the second embodiment is different from the above-mentioned first embodiment in that it is a round roller structure. After the film laying mechanism 50 grabs the diaphragm through the film clamping structure 54, it can drive the diaphragm to rotate around the first circumferential direction, or drive the diaphragm to rotate around the second circumferential direction. In this embodiment, the first circumferential direction is counterclockwise and the second circumferential direction is clockwise. Of course, the directions of the two can also be reversed.

[0164] In this embodiment, the roller includes two half rollers arranged opposite to each other, the outer surface of the half roller is an arc surface, and the inner surface opposite to each other is a plane (the cross section is approximately a "D"-shaped structure), and the outer surfaces of the two half rollers form a complete circular roller surface. The two half rollers can approach or move away from each other under the drive of the driving mechanism, and the gap between the two forms the above-mentioned film clamping structure 54. Those skilled in the art can understand that when the two half rollers approach each other, the diaphragm can be grasped, and when the two half rollers move away from each other, the diaphragm can be released.

[0165] Of course, the film-clamping structure 54 can also be configured as other structures, such as providing adsorption holes, clips, etc. on the outer surface of the roller.

[0166] exist Fig.12 In the direction shown, the first film laying position is located on the left side of the lamination table 10 , and the second film laying position is located on the right side of the lamination table 10 .

[0167] Furthermore, if Figures 7 to 11 As shown, the lamination device also includes a first clamping structure 55 and a second clamping structure 56 suitable for clamping the diaphragm, and a first cutting structure 57 and a second cutting structure 58 suitable for cutting the diaphragm. The first clamping structure 55 and the first cutting structure 57 are arranged at the first film laying position, and the second clamping structure 56 and the second cutting structure 58 are arranged at the second film laying position.

[0168] Based on the above structure, the working process of the film laying mechanism 50 of the second embodiment is described in detail below:

[0169] 1. If Figure 7 As shown, the winding roller is initially in the first film laying position, the winding roller grabs the end of the diaphragm on the first clamping structure 55 through the film clamping structure 54, and is ready to move toward the second film laying position;

[0170] 2. If Figure 8 As shown, the winding roller moves toward the second film laying position, and the winding roller rotates toward the first circumferential direction while moving, so that the diaphragm is wound on the winding roller, that is, the diaphragm is cached at the same time during the process of laying the diaphragm;

[0171] 3. If Figure 8 and Fig. 9 As shown, the first cutting structure 57 and the second cutting structure 58 cut off the two sides of the diaphragm to achieve the laying of a single diaphragm;

[0172] 4. If Fig.10 As shown, when the winding roller is in the second film laying position, the second clamping structure 56 clamps the end of the diaphragm cached on the winding roller, and the winding roller is ready to move toward the first film laying position;

[0173] 5. If Fig.11 As shown, the roller moves toward the first film laying position, and rotates in the second circumferential direction while moving to release the cached diaphragm from the roller, that is, the cached diaphragm is released during the movement, until the roller moves to the first film laying position, the cached diaphragm is released, and the second clamping structure 56 loosens the diaphragm to complete a reciprocating diaphragm laying.

[0174] By repeating the above steps 1 to 5 repeatedly, the diaphragm can be laid reciprocally in the first direction.

[0175] Compared with the above-mentioned embodiment 1, the film laying mechanism 50 of the second embodiment has a slightly more complicated structure and control process, but the second diaphragm feeding mechanism 42 in the embodiment 1 can be omitted, so that the size of the lamination device in the first direction is smaller.

[0176] (2) Loading and handling mechanism

[0177] like Figure 1 , Fig.23 and Fig.24 As shown, in the technical solution of this embodiment, the loading and conveying mechanism 70 is arranged above the stacking table 10, and the loading and conveying mechanism 70 is suitable for reciprocating between the positive electrode sheet feeding mechanism 20 and the negative electrode sheet feeding mechanism 30 to convey the positive electrode sheet to the stacking table 10, or to convey the negative electrode sheet to the stacking table 10.

[0178] Specifically, if Fig.23As shown, the loading and transporting mechanism 70 includes a mounting frame 71, and a first gripping structure 72 and a second gripping structure 73 mounted on the mounting frame 71. The mounting frame 71 has a first transporting position and a second transporting position. When the mounting frame 71 is in the first transporting position, the first gripping structure 72 is located above the positive electrode sheet feeding mechanism 20, and the second gripping structure 73 is located above the lamination platform 10. When the mounting frame 71 is in the second transporting position, the first gripping structure 72 is located above the lamination platform 10, and the second gripping structure 73 is located above the negative electrode sheet feeding mechanism 30.

[0179] Furthermore, the mounting frame 71 is in the form of an elongated strip structure, which extends along the first direction. The mounting frame 71 as a whole can be moved along the second direction. The first grasping structure 72 and the second grasping structure 73 are also in the form of elongated strip structures, both of which extend along the first direction. The distance between the first grasping structure 72 and the second grasping structure 73 is consistent with the distance between the sliding cutting table 62 and the support of the laminating table 10 when the sliding cutting table 62 is in the second position.

[0180] Furthermore, the first gripping structure 72 can grab multiple positive electrode sheets cut on the sliding cutting table 62 at one time, or simultaneously place multiple positive electrode sheets on the lamination table 10. The second gripping structure 73 can grab multiple negative electrode sheets cut on the sliding cutting table 62 at one time, or simultaneously place multiple negative electrode sheets on the lamination table 10.

[0181] The positive and negative electrode sheet loading and transporting process of the loading and transporting mechanism 70 is as follows:

[0182] 1. The mounting frame 71 is initially in the first transport position, and the first grabbing structure 72 grabs a plurality of positive electrode sheets;

[0183] 2. The mounting frame 71 moves to the second transport position; the first grabbing structure 72 places a plurality of positive electrode sheets on the stacking table 10, and the second grabbing structure 73 grabs a plurality of negative electrode sheets;

[0184] 3. The mounting frame 71 moves to the first transport position; the second grabbing structure 73 places a plurality of negative electrode sheets on the stacking table 10, and the first grabbing structure 72 grabs a plurality of positive electrode sheets.

[0185] By repeating steps 2 and 3, the positive electrode sheets and the negative electrode sheets can be stacked back and forth on the stacking table 10 .

[0186] like Fig.23 and Fig.24 As shown, in the technical solution of this embodiment, the first grasping structure 72 and the second grasping structure 73 each include a plurality of adsorption plates 74 arranged in sequence, and the loading and conveying mechanism also includes a variable distance structure 75, which is arranged on the mounting frame 71 and is suitable for changing the distance between adjacent adsorption plates 74.

[0187] Specifically, the specific number of adsorption plates 74 of the first grasping structure 72 and the second grasping structure 73 is adapted to the number of sheets produced at one time by the positive sheet production mechanism 22 and the negative sheet production mechanism 32. For example, in the present embodiment, the positive sheet production mechanism 22 produces twelve positive sheets at one time, and the negative sheet production mechanism 32 produces twelve negative sheets at one time, so the first grasping structure 72 includes twelve adsorption plates 74, and the second grasping structure 73 includes twelve adsorption plates 74.

[0188] like Fig.24 As shown, the adsorption plate 74 is connected to the mounting frame 71 through an L-shaped cantilever. A guide rail is provided on the mounting frame, and a slider is provided on the vertical side of the cantilever. The slider is connected to the guide rail so that the cantilever can slide on the mounting frame 71. The adsorption plate 74 is connected to the lower surface of the horizontal side of the cantilever. The adsorption plate 74 can be connected to the external negative pressure structure through a pipeline so that the lower end of the adsorption plate 74 can be passed through negative pressure. When negative pressure is passed through the lower end of the adsorption plate 74, the adsorption plate 74 can grab the positive electrode sheet or the negative electrode sheet. When negative pressure is not passed through the lower end of the adsorption plate 74, the adsorption plate 74 can place the positive electrode sheet or the negative electrode sheet on the stacking table 10.

[0189] Furthermore, after the pole piece material strip is cut on the above-mentioned sliding cutting table 62, adjacent pole pieces are in a close contact state (only cutting gaps remain). However, when multiple pole pieces are stacked on the stacking table 10, a certain distance between adjacent pole pieces is required. Therefore, a variable distance structure 75 is provided in this embodiment to adjust the distance between adjacent adsorption plates 74.

[0190] Specifically, the variable pitch structure 75 enables adjacent adsorption plates 74 to have a first state of being closely attached to each other, and a second state of being spaced apart. When the adsorption plate 74 grabs the pole piece, the variable pitch structure enables the adsorption plate 74 to be in the first state to adapt to the closely attached state between the pole pieces after cutting. When the mounting frame 71 moves, so that the adsorption plate 74 moves from the sliding cutting table 62 to the lamination table 10, the variable pitch structure enables the adsorption plate 74 to be in the second state to meet the requirement that adjacent pole pieces need a certain distance during the lamination process.

[0191] The above-mentioned variable pitch structure 75 may include a linear cylinder, a limit block, a reset spring, etc. The linear cylinder may push the sliders on the above-mentioned cantilever to move together in one direction to reduce the distance between adjacent adsorption plates 74. The above-mentioned limit block may limit the spacing between the sliders on adjacent cantilevers. The above-mentioned reset spring may reset the slider positions between adjacent cantilevers to increase the distance between adjacent adsorption plates 74.

[0192] (3) Lamination process

[0193] According to the structures of the above-mentioned film laying mechanism 50 and the material loading and conveying mechanism 70, the laminating process of the laminating device in this embodiment is described in detail below by taking the diaphragm feeding mechanism 40 of the second embodiment and the film laying mechanism 50 of the second embodiment as examples:

[0194] 1. The loading and transporting mechanism 70 places a row of positive electrode sheets on the stacking table 10;

[0195] 2. The support frame 51 moves close to the first diaphragm feeding mechanism 41, and the first film clamping structure 52 grabs the diaphragm;

[0196] 3. The support frame 51 moves to a position close to the second diaphragm feeding mechanism 42, the first cutting structure cuts the diaphragm, the first clamping structure 52 releases the diaphragm, and the second clamping structure 53 grabs the diaphragm;

[0197] 3. The loading and transporting mechanism 70 places a row of negative electrode sheets on the stacking table 10;

[0198] 4. The support frame 51 moves close to the first diaphragm feeding mechanism 41, the second cutting structure cuts the diaphragm, the second clamping structure 53 releases the diaphragm, and the first clamping structure 52 grabs the diaphragm;

[0199] By repeating the above steps 1 to 4, a stacking of "positive electrode sheet-diaphragm-negative electrode sheet-diaphragm" can be performed to form a battery cell. The number of battery cells formed depends on the number of sheets produced at one time by the sliding cutting table 62. In this embodiment, the sliding cutting table 62 produces twelve electrode sheets at one time, so the stacking table 10 can stack twelve battery cells at one time.

[0200] In this embodiment, the high-speed cycle production of the positive electrode sheet making mechanism 22 and the negative electrode sheet making mechanism 32, combined with the high-speed reciprocating movement of the film laying mechanism 50, realizes high-speed lamination of the laminating device, greatly improving the production efficiency.

[0201] 5. Cell unloading and subsequent processing

[0202] After the positive electrode sheets, the negative electrode sheets and the separators are stacked on the stacking table 10 , the multiple battery cells need to be unloaded and subsequently processed.

[0203] like Figure 1 and Fig.25 As shown, in the technical solution of this embodiment, the laminating device further includes a material unloading and conveying mechanism 90. Specifically, the material unloading and conveying mechanism 90 may include a plurality of clamping claws 93 ( Fig.26 The number of the clamps 93 is adapted to the number of the cells. The plurality of clamps 93 are mounted on the slide frame 92, and the clamps 93 can clamp the cells from the side. The slide frame 92 can slide along a straight line through a linear mechanism, so that the cells are transported and unloaded from the lamination table 10 for subsequent processing.

[0204] like Figure 1 As shown, in the technical solution of this embodiment, the laminating device further includes a hot cutting mechanism 110, a gluing mechanism 120 and a hot pressing mechanism 100 which are sequentially arranged downstream of the laminating platform 10. The three are located on the moving path of the unloading and conveying mechanism 90, and the three are arranged once along the first direction.

[0205] Specifically, among the multiple battery cells that have been stacked by the stacking table 10, on the one hand, the positive electrode sheets, diaphragms and battery cells are still in a loose state, and on the other hand, the diaphragms between adjacent battery cells have not been cut off. Therefore, in subsequent processing, multiple battery cells first pass through the hot cutting mechanism 110 to cut the diaphragms between adjacent battery cells and heat-melt the diaphragms together. Then a single battery cell passes through the gluing mechanism 120 to glue the edges of the battery cell, thereby achieving edge sealing of the battery cell. Finally, a single battery cell needs to be compacted by the hot pressing mechanism 100 to complete the processing of the battery cell. Subsequently, the battery cell completes the stacking process and can be transferred out of the stacking device and proceed to the next process.

[0206] Optionally, the positions of the hot cutting mechanism 110 and the gluing mechanism 120 can be swapped, that is, after the battery cell is cut, the gluing is first performed, and then the hot cutting is performed. In this embodiment, the gluing mechanism 120, the hot cutting mechanism 110, and the hot pressing mechanism 100 are arranged in sequence along the flow direction of the battery cell.

[0207] like Fig.25 and Fig.26 As shown, in the technical solution of this embodiment, the material unloading and transporting mechanism 90 includes a linear guide rail 91, a sliding frame 92 and a linear drive mechanism 94. The linear guide rail 91 extends along the first direction, and the linear guide rail 91 passes through the hot cutting mechanism 110, the gluing mechanism 120 and the hot pressing mechanism 100. The sliding frame 92 is slidably arranged on the linear guide rail 91, and a plurality of clamps 93 are fixedly arranged on the sliding frame 92, and the clamps 93 are suitable for clamping the battery core. The linear drive mechanism 94 is suitable for driving the sliding frame 92 to reciprocate on the linear guide rail 91.

[0208] Combination Figure 1 It can be seen that the linear guide rail 91 extends along the first direction, and Figure 1 The left side of the linear guide rail 91 is located between the lamination table 10 and the negative electrode sheet making mechanism 32 , and the right side of the linear guide rail 91 extends in a direction away from the lamination table 10 and passes through the hot cutting mechanism 110 , the gluing mechanism 120 and the hot pressing mechanism 100 .

[0209] Furthermore, the cross-section of the sliding frame 92 is roughly "L"-shaped. The bottom plate of the sliding frame 92 can be slidably set on the linear guide rail. The side plates of the sliding frame 92 are provided with the above-mentioned multiple clamps 93. The sliding frame 92 as a whole can slide on the linear guide rail 91 through the linear drive mechanism 94, thereby realizing the sliding of multiple clamps 93 along the first direction.

[0210] like Fig.26 As shown, the clamping jaw 93 includes a mounting plate and an upper clamping jaw and a lower clamping jaw arranged on the mounting plate, the upper clamping jaw and the lower clamping jaw are slidably arranged on the mounting plate through a slide rail and a slider, and the mounting plate is arranged on the side plate of the sliding frame 92. The upper clamping jaw and the lower clamping jaw can be moved closer to or away from each other through a driving mechanism, so as to clamp or release the battery cell.

[0211] In this embodiment, the battery cell can be subjected to subsequent processing such as hot cutting, gluing and hot pressing by a single transfer of the unloading and conveying mechanism 90, so the subsequent processing of the battery cell is fast and does not affect the production rhythm of the previous film making process. In addition, the battery cell does not need to be transferred at each stage of the unloading process, which reduces the auxiliary time and reduces the damage to the battery cell caused by the conveying mechanism and the conveying process, thereby improving production efficiency and battery cell quality.

[0212] like Fig. 27 As shown, the heat cutting mechanism 110 includes a cutter, which can be heated to a certain temperature. The cutter can cut the separator downwards, thereby separating adjacent battery cells and heat-melting the separators together.

[0213] like Fig.28 As shown, the gluing mechanism 120 includes two gluing heads arranged opposite to each other in the horizontal direction, one of which is used to glue the bottom edge (non-thermal melting edge) of the battery cell, and the other is used to glue the top edge (non-thermal melting edge with the tab) of the battery cell. Furthermore, a plurality of notches are provided on the top edge of the sliding frame 92, and when the sliding frame 92 slides to the gluing mechanism 120, one of the gluing heads can extend through the notch to glue the battery cell.

[0214] like Fig.29 As shown, in the technical solution of this embodiment, the hot pressing mechanism 100 includes a conveyor belt 101 and a hot pressing box 102 arranged on the conveying path of the conveyor belt 101, and the conveying path of the linear guide 91 is butted with the end of the conveyor belt 101. Specifically, the conveying end point of the battery cell by the unloading and conveying mechanism 90 is also the conveyor belt 101. After the unloading and conveying mechanism 90 places the battery cell on the conveyor belt 101, the conveyor belt 101 continues to circulate the battery cell. After the conveyor belt 101 allows the battery cell to pass through the hot pressing box 102, the battery cell is hot pressed in the hot pressing box 102, thereby completing the subsequent processing of the battery cell.

[0215] After the battery cell is hot-pressed, it can be transferred out of the stacking device and processed in the subsequent process.

[0216] Of course, the lamination device can add subsequent processing stations according to actual needs.

[0217] The present application also provides a battery production line. The battery production line according to the present application includes the above-mentioned stacking device.

[0218] 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 lamination platform (10), wherein the lamination platform (10) is fixedly arranged; A diaphragm feeding mechanism (40), the diaphragm feeding mechanism (40) being one and fixedly arranged and being suitable for providing diaphragms to the lamination platform (10); A positive electrode sheet feeding mechanism (20) and a negative electrode sheet feeding mechanism (30), respectively adapted to provide positive electrode sheets and negative electrode sheets to the lamination platform (10); A film laying mechanism (50) is movably arranged above the laminating platform (10), the film laying mechanism (50) is suitable for grabbing the diaphragm and reciprocating above the laminating platform (10) along the feeding direction of the film laying mechanism (50); A material unloading and transporting mechanism (90) is movably arranged on the side of the lamination platform (10) and is suitable for unloading the laminated battery cells; The hot cutting mechanism (110), the gluing mechanism (120) and the hot pressing mechanism (100) are arranged on the moving path of the material unloading and conveying mechanism (90). The material unloading and conveying mechanism (90) passes through the hot cutting mechanism (110), the gluing mechanism (120) and the hot pressing mechanism (100) during the unloading and moving process. A membrane feeding mechanism (40) is arranged on the side of the laminating platform (10) along a first direction, and the film laying mechanism (50) includes a roller, on which a film clamping structure (54) is arranged, and the roller can grab the membrane through the film clamping structure (54) and drive the membrane to rotate around the central axis of the roller in two directions. The film laying mechanism (50) has a first film laying position close to the diaphragm feeding mechanism (40) and a second film laying position away from the diaphragm feeding mechanism (40). When the film laying mechanism (50) moves from the first film laying position to the second film laying position, the roller rotates in a first circumferential direction to wind the diaphragm outside the roller for buffering. When the film laying mechanism (50) moves from the second film laying position to the first film laying position, the roller rotates in a second circumferential direction to release the diaphragm. The lamination device also includes a first clamping structure (55) and a second clamping structure (56) suitable for clamping the diaphragm, and a first cutting structure (57) and a second cutting structure (58) suitable for cutting the diaphragm, wherein the first clamping structure (55) and the first cutting structure (57) are arranged at the first film laying position, and the second clamping structure (56) and the second cutting structure (58) are arranged at the second film laying position.

2. The lamination device according to claim 1, characterized in that: The positive electrode sheet feeding mechanism (20) comprises a positive electrode material strip unwinding mechanism (21) and a positive electrode sheet making mechanism (22); the negative electrode sheet feeding mechanism (30) comprises a negative electrode material strip unwinding mechanism (31) and a negative electrode sheet making mechanism (32); the positive electrode material strip unwinding mechanism (21) is suitable for unwinding the positive electrode material strip from the positive electrode sheet making mechanism (22); the positive electrode sheet making mechanism (22) is suitable for cutting the positive electrode material strip into a plurality of positive electrode sheets and providing positive electrode sheets to the lamination platform (10); the negative electrode material strip unwinding mechanism (31) is suitable for unwinding the negative electrode material strip from the negative electrode sheet making mechanism (32); the negative electrode sheet making mechanism (32) is suitable for cutting the negative electrode material strip into a plurality of negative electrode sheets and providing negative electrode sheets to the lamination platform (10); The positive electrode sheet making mechanism (22) and the negative electrode sheet making mechanism (32) are respectively located on both sides of the lamination platform (10) along the second direction, the positive electrode material strip unwinding mechanism (21) is located on the side of the positive electrode sheet making mechanism (22) along the first direction, the negative electrode material strip unwinding mechanism (31) is located on the side of the negative electrode sheet making mechanism (32) along the first direction, and the diaphragm feeding mechanism (40) is located between the positive electrode sheet feeding mechanism (20) and the negative electrode sheet feeding mechanism (30).

3. The lamination device according to claim 2, characterized in that: The positive electrode sheet manufacturing mechanism (22) and the negative electrode sheet manufacturing mechanism (32) both include: A fixing platform (61) extending along the first direction; a sliding cutting table (62) extending along the first direction and slidably arranged on the fixed table (61); the sliding cutting table (62) is suitable for receiving the positive electrode material strip or the negative electrode material strip, and making the positive electrode material strip or the negative electrode material strip and the sliding cutting table (62) slide synchronously relative to the fixed table (61); the sliding cutting table (62) has a first position and a second position; A cutting structure (63) is fixedly arranged above the fixing platform (61). In the process of the sliding cutting table (62) moving from the first position to the second position, the sliding cutting table (62) drives the positive electrode material strip or the negative electrode material strip to pass through the cutting structure (63), and the cutting structure (63) cuts the positive electrode material strip or the negative electrode material strip into a plurality of positive electrode sheets or a plurality of negative electrode sheets.

4. The lamination device according to claim 3, characterized in that: The fixed platform (61) is provided with an adsorption structure (64), the sliding cutting platform (62) is provided with an adsorption hole (621), and the sliding cutting platform (62) passes through the adsorption structure (64) when the sliding cutting platform (62) moves from the first position to the second position.

5. The lamination device according to claim 2, characterized in that: The positive electrode sheet manufacturing mechanism (22) and the negative electrode sheet manufacturing mechanism (32) both include: A fixing platform (61) extending along the first direction; a sliding cutting table (62) extending along the first direction and slidably arranged on the fixed table (61); the sliding cutting table (62) is suitable for receiving the positive electrode material strip or the negative electrode material strip, and making the positive electrode material strip or the negative electrode material strip and the sliding cutting table (62) slide synchronously relative to the fixed table (61); the sliding cutting table (62) has a first position and a second position; a cutting structure (63) movably disposed above the fixing platform (61) along the first direction, After the sliding cutting table (62) moves from the first position to the second position, the cutting structure (63) moves along the extension direction of the positive electrode material strip or the negative electrode material strip, and cuts the positive electrode material strip or the negative electrode material strip into a plurality of positive electrode sheets or a plurality of negative electrode sheets.

6. The lamination device according to claim 3 or 5, characterized in that: The lamination device also includes a feeding structure (65), which is suitable for conveying positive electrode material strips or negative electrode material strips. A clamping structure (66) is provided at the end of the sliding cutting table (62). When the sliding cutting table (62) is in the first position, the clamping structure (66) is located in front of the feeding structure (65), and the clamping structure (66) is suitable for clamping the positive electrode material strip or the negative electrode material strip conveyed by the feeding structure (65).

7. The lamination device according to claim 2, characterized in that: The positive electrode sheet manufacturing mechanism (22) and the negative electrode sheet manufacturing mechanism (32) both include: A fixing platform (61) extending along the first direction, wherein a material clamping structure (66) is provided at an end of the fixing platform (61); A feeding structure (65) is slidably arranged on the fixed platform (61) along the first direction, the feeding structure (65) is suitable for conveying a positive electrode material strip or a negative electrode material strip, and the feeding structure (65) has a first position and a second position; a cutting structure (63) movably disposed above the fixing platform (61) along the first direction, Among them, after the feeding structure (65) moves from the first position to the second position, the clamping structure (66) is located at the front side of the feeding structure (65) and clamps the positive electrode material strip or the negative electrode material strip conveyed by the feeding structure (65), and then after the feeding structure (65) retracts to the second position, the cutting structure (63) moves along the extension direction of the positive electrode material strip or the negative electrode material strip, and cuts the positive electrode material strip or the negative electrode material strip into multiple positive electrode sheets or multiple negative electrode sheets.

8. The lamination device according to claim 3, characterized in that: A dust removal structure (67) is provided on the fixing platform (61), and the dust removal structure (67) is arranged below the cutting structure (63).

9. The lamination device according to claim 3, characterized in that: The cutting structure (63) includes a laser.

10. The lamination device according to claim 1, characterized in that: The lamination device further comprises a loading and conveying mechanism (70), which is arranged above the lamination platform (10) and is suitable for reciprocating along a second direction between the positive electrode sheet feeding mechanism (20) and the negative electrode sheet feeding mechanism (30) to convey the positive electrode sheet to the lamination platform (10) or to convey the negative electrode sheet to the lamination platform (10).

11. The lamination device according to claim 10, characterized in that: The loading and transporting mechanism (70) comprises a mounting frame (71), and a first gripping structure (72) and a second gripping structure (73) mounted on the mounting frame (71); the mounting frame (71) has a first transporting position and a second transporting position; when the mounting frame (71) is in the first transporting position, the first gripping structure (72) is located above the positive electrode sheet feeding mechanism (20), and the second gripping structure (73) is located above the stacking platform (10); when the mounting frame (71) is in the second transporting position, the first gripping structure (72) is located above the stacking platform (10), and the second gripping structure (73) is located above the negative electrode sheet feeding mechanism (30).

12. The lamination device according to claim 11, characterized in that: The first gripping structure (72) and the second gripping structure (73) both include a plurality of adsorption plates (74) arranged in sequence, and the loading and transporting mechanism further includes a variable distance structure (75), wherein the variable distance structure (75) is arranged on the mounting frame (71) and is suitable for changing the distance between adjacent adsorption plates (74).

13. The lamination device according to any one of claims 1 to 5, characterized in that: The hot cutting mechanism (110), the gluing mechanism (120) and the hot pressing mechanism (100) are arranged in sequence along the cutting direction of the battery core, or the gluing mechanism (120), the hot cutting mechanism (110) and the hot pressing mechanism (100) are arranged in sequence along the cutting direction of the battery core.

14. The lamination device according to claim 1 or 2, characterized in that: The material unloading and conveying mechanism (90) comprises: A linear guide rail (91) extending along a first direction, wherein the linear guide rail (91) passes through the hot cutting mechanism (110), the gluing mechanism (120) and the hot pressing mechanism (100); A sliding frame (92) is slidably arranged on the linear guide rail (91), and a plurality of clamping claws (93) are fixedly arranged on the sliding frame (92), and the clamping claws (93) are suitable for clamping the battery core; The linear drive mechanism (94) is suitable for driving the sliding frame (92) to move back and forth on the linear guide rail (91).

15. The lamination device according to claim 14, characterized in that: The hot pressing mechanism (100) comprises a conveying belt (101) and a hot pressing box (102) arranged on a conveying path of the conveying belt (101); the conveying path of the linear guide rail (91) is butted against an end of the conveying belt (101).

16. A battery production line, characterized in that: Comprising a lamination device as claimed in any one of claims 1 to 15.

Images