Reciprocating folding mechanism, folding method, lamination mechanism and lamination method

Abstract

The application discloses a reciprocating folding mechanism, comprising: a laminating table; a reciprocating folding mechanism for reciprocating folding of a strip-shaped strip material on the laminating table; a folding positioning mechanism for controlling the positions of two ends of the strip material reciprocating folded; the reciprocating folding mechanism comprises a folding roller set and a driving assembly for driving the folding roller set to move along a preset track; the folding roller set comprises two oppositely arranged folding rollers for guiding the strip material; the preset track comprises two end track sections respectively arranged corresponding to the positions of the two ends of the strip material reciprocating folded; among any two points on one end track section, the distance between one point close to the other end track section and the laminating table is greater than the distance between the other point and the laminating table; the driving assembly drives the folding roller set to reciprocate along the preset track, so as to reciprocating fold the strip material on the laminating table. The application also discloses a reciprocating folding method, a laminating mechanism and a laminating method.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery or capacitor manufacturing, and specifically relates to a reciprocating folding mechanism, a folding method, a lamination mechanism and a lamination method. Background Art

[0002] Chinese patent application publication number CN113555595A discloses a thermal composite lamination device and method. Specifically, the specification describes a lamination mechanism. Specifically, the lamination mechanism includes a magazine and a blow assembly. The magazine has an opening at its top end, and a main conveying mechanism drives a strip of material vertically into the magazine through the opening. The blow assembly is located on one side of the magazine. When the end of the strip of material enters the top end of the magazine, the blow assembly blows air toward the other side of the magazine, pushing the end of the strip of material into contact with the other side of the magazine. The strip of material then continues to move downward against the magazine, positioning the first unit sheet. The blow assembly then stops blowing, allowing the strip of material to fall freely and fold in a Z-shape, stacking the units in the magazine in sequence. When a predetermined number of units are stacked, the strip of material is cut. At this point, the magazine filled with units of material leaves the bottom of the strip of material, and the empty magazine moves back to the bottom of the strip of material. This ensures a continuous lamination process, reduces waiting time, and improves production efficiency.

[0003] Although this lamination mechanism can theoretically meet the lamination requirements of the material strip, its lamination accuracy cannot be guaranteed. During lamination, the material strip is only blown by the blowing component, and the blanking position and folding position of the material strip cannot be accurately controlled. Battery manufacturing requires high position accuracy of the lamination. If the lamination error is large, the battery product produced will be scrapped. If other auxiliary means are used after lamination to improve the lamination accuracy, it will inevitably lead to relative movement between the stacked materials, which will affect the surface properties of the stacked materials and also lead to a decrease in the quality of the battery product produced. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a reciprocating folding mechanism, a folding method, a lamination mechanism and a lamination method, which can realize continuous folding and continuous lamination and can effectively control the accuracy of folding and lamination.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention first proposes a reciprocating folding mechanism, comprising:

[0007] Lamination table;

[0008] A reciprocating folding mechanism, used for reciprocatingly folding the strip material in a strip shape on the lamination table;

[0009] The folding positioning mechanism is used for controlling the position of the two ends of the strip material to be folded back and forth.

[0010] The reciprocating folding mechanism comprises a folding guide roller set and a driving assembly for driving the folding guide roller set to move along a preset track; the folding guide roller set comprises two oppositely arranged folding guide rollers for guiding the strip material; the preset track comprises two end track sections respectively arranged corresponding to the positions of the two ends of the strip material to be folded back and forth; the distance between any two points on one of the end track sections and the laminating table is greater than the distance between the other point and the laminating table; the driving assembly drives the folding guide roller set to reciprocate along the preset track to fold the strip material back and forth on the laminating table.

[0011] Further, when the folding guide roller set is located at one end of one of the end track sections away from the other end track section, the closest point of the folding guide roller to the laminating table is flush with the laminating table or the strip material that has been laminated and completed on the uppermost layer.

[0012] Further, the highest point between the two end track sections and the laminating table with the farthest distance is smoothly connected; or a connecting track section is arranged between the highest point between the two end track sections and the laminating table with the farthest distance, and the connecting track section and the end track section are smoothly connected.

[0013] Further, the end track section is a straight track arranged obliquely relative to the laminating table.

[0014] Further, the driving assembly comprises a mounting seat, a telescopic rod perpendicular to the laminating table is arranged on the mounting seat, and the folding guide roller set is mounted on the telescopic rod; the driving assembly further comprises a parallel motion driving mechanism for driving the mounting seat to move along a direction parallel to the laminating table and a vertical motion driving mechanism for driving the telescopic rod to extend or shorten.

[0015] Further, the end track section is a circular arc track.

[0016] Further, the driving assembly comprises a swing arm, the lower end of the swing arm extends below the laminating table, the lower end of the swing arm is rotatable relative to a rotating shaft, and the folding guide roller set is mounted on the upper end of the swing arm.

[0017] Further, the end track section is a circular arc track or an elliptical arc track.

[0018] Further, the driving assembly comprises a base and a swing base, at least two double-hinged connecting rods are arranged between the base and the swing base, the base and the swing base are parallel to each other, and any two double-hinged connecting rods are parallel to each other; the swing base is provided with a mounting rod, and the folding guide roller group is mounted on the mounting rod.

[0019] The driving assembly further comprises a linear motion mechanism for driving the base to move in a direction parallel to the laminated table and a rotating driving mechanism for driving the double-hinged connecting rods to rotate relative to the base.

[0020] Further, the folding positioning mechanism comprises positioning rods, positioning press needles or positioning press blocks respectively located at two end positions of the strip material reciprocating folding.

[0021] Further, the strip material buffering mechanism comprises fixed rollers arranged on both sides, a movable roller arranged between the fixed rollers on both sides, and a tension mechanism for driving the movable roller to move to control the tension of the strip material, and the strip material enters the reciprocating folding mechanism after passing through the buffering mechanism.

[0022] Further, the laminated table moving driving mechanism for driving the laminated table to move in a direction perpendicular to the table surface is further included.

[0023] Further, the fixed guide roller group is further included, and the strip material enters the folding guide roller group after being guided by the fixed guide roller group.

[0024] The application further provides a reciprocating folding method, comprising the following steps:

[0025] 11) The folding guide roller group is located at the first end of the strip material reciprocating folding, and the strip material at the first end is pressed and fixed by using the folding positioning mechanism;

[0026] 12) The folding guide roller group is driven to move along a preset track by using the driving assembly, the folding guide roller group is moved to the second end position of the strip material reciprocating folding, and the strip material at the second end is pressed and fixed by using the folding positioning mechanism;

[0027] 13) The folding guide roller group is driven to move along a preset track by using the driving assembly, the folding guide roller group is moved to the first end position of the strip material reciprocating folding, and the strip material at the first end is pressed and fixed by using the folding positioning mechanism;

[0028] 14) The steps 12) to 13) are cycled until the folding is completed.

[0029] Further, in the step 12) and / or step 13), when the folding roller group moves for a set number of n times between the first end and the second end of the strip material folded back and forth, the laminating table is driven to move a distance s in a direction perpendicular to the surface of the table towards the side opposite to the folding roller group, and s = n*h, h is the thickness of the strip material, and n≥1.

[0030] The present application also provides a reciprocating lamination mechanism, comprising the reciprocating folding mechanism and the sheet material conveying mechanism as described above, and the sheet material conveying mechanism is used to convey sheet material in a sheet shape and sequentially stack the sheet material on the strip material after each folding of the strip material.

[0031] Further, the two ends of the strip material folded back and forth form a laminating area, and the sheet material laminating feeding mechanism comprises a sheet material feeding mechanism for conveying sheet material to the laminating area and a sheet material positioning mechanism for positioning the sheet material in the set laminating area.

[0032] Further, the sheet material feeding mechanism comprises:

[0033] A feeding belt, at least one end of the feeding belt is provided with a feeding end;

[0034] A feeding driving mechanism is used to drive the feeding end to move back and forth between the initial position and the terminal position, when both ends of the feeding belt are provided with feeding ends, the initial positions of the two feeding ends are located at the opposite ends of the laminating area respectively; and:

[0035] When the feeding end is located at the initial position, the feeding end is located outside the laminating area and close to one end of the laminating area; when the feeding end is located at the terminal position, the feeding end is located inside the laminating area and close to the other end of the laminating area.

[0036] A feeding control mechanism is used to synchronize the movement of the sheet material with the feeding belt during the movement of the feeding end from the initial position to the terminal position, and the sheet material can be separated from the feeding belt during the movement of the feeding end from the terminal position to the initial position.

[0037] Further, the sheet material positioning mechanism comprises a sheet material positioning member, the sheet material positioning member is arranged close to the terminal position of the corresponding feeding end, and the sheet material positioning member comprises a sheet material pressing rod, a sheet material pressing needle or a sheet material pressing block.

[0038] The present application also provides a reciprocating lamination method, comprising the following steps:

[0039] 21) The folding guide roller group is located at the first end of the strip material folded back and forth, and the folding positioning mechanism is used to press and fix the strip material at the first end;

[0040] 22) The sheet material conveying mechanism is used to stack sheet material in a sheet shape on the strip material;

[0041] 23) driving the folding roller set to move along the preset track by the driving assembly, moving the folding roller set to the second end position of the back-and-forth folding of the strip material, and pressing and fixing the strip material at the second end by the folding positioning mechanism;

[0042] 24) stacking the sheet material in the form of sheets on the strip material by the sheet material conveying mechanism;

[0043] 25) driving the folding roller set to move along the preset track by the driving assembly, moving the folding roller set to the first end position of the back-and-forth folding of the strip material, and pressing and fixing the strip material at the first end by the folding positioning mechanism;

[0044] 26) repeating steps 22) to 25) until the folding is completed.

[0045] Further, in steps 23) and / or 25), after the folding roller set moves between the first end and the second end of the back-and-forth folding of the strip material for a preset number of N times, the sheet stacking table is driven to move a distance S in the second direction away from the side opposite to the folding roller set, and S = N*H, H is the sum of the thicknesses of one layer of the strip material and one layer of the sheet material, and N ≥ 1.

[0046] The present application has the following beneficial effects:

[0047] The reciprocating folding mechanism of the present application drives the folding roller set to reciprocally move along the preset track by the driving assembly. When the folding roller set moves to the first end of the back-and-forth folding of the strip material, the strip material at the first end of the back-and-forth folding is pressed and fixed by the folding positioning mechanism. Then, the folding roller set is moved to the second end of the back-and-forth folding relative to the sheet stacking table, and the strip material at the second end of the back-and-forth folding is again pressed and fixed by the folding positioning mechanism. Such a reciprocating cycle can position and fold the strip material on the sheet stacking table. The two end positions of the folding are precisely positioned and controlled by the folding positioning mechanism, so that not only continuous folding can be achieved, but also the folding precision can be improved. In addition, since the two ends of the preset track are respectively provided with end track sections, and the spacing between the end track sections and the sheet stacking table gradually increases in the direction from the end to the middle, when the folding roller set moves away from one end of the back-and-forth folding of the strip material, the spacing between the folding roller set and the sheet stacking table gradually increases, so that interference between the folding roller set and the strip material that has been folded is avoided. When the folding roller set reaches one end of the back-and-forth folding of the strip material, the spacing between the folding roller set and the sheet stacking table gradually decreases, so that when the folding roller set reaches the end position of the corresponding end track section, the strip material guided by the folding roller set is flush with the sheet stacking table or the strip material that has been folded, so that damage to the strip material can be avoided when the strip material is pressed and fixed by the folding positioning mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to make the purposes, technical solutions and beneficial effects of the present application clearer, the present application is described below with the help of the following drawings:

[0049] Figure 1 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0050] Figure 2 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0051] Figure 3 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0052] Figure 4 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0053] Figure 5 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0054] Figure 6 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0055] Figure 7 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0056] Figure 8 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0057] Figure 9 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0058] Figure 10 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0059] Figure 11 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0060] Figure 12 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0061] Figure 13 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0062] Figure 14 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0063] Figure 15 Structure diagram of the embodiment of the reciprocating folding mechanism of the present application;

[0064] Figure 16 Structure diagram of the reciprocating laminated core mechanism of the present application;

[0065] Figure 17 Detail view of A of Figure 16

[0066] Figure 18 Detail view of B of Figure 16

[0067] Figure 19 Second structure diagram of the reciprocating laminated core mechanism of the present application;

[0068] Figure 20 Third structure diagram of the reciprocating laminated core mechanism of the present application;

[0069] Figure 21 State diagram of the first end of the strip when the strip is pressed and fixed;

[0070] Figure 22 First state diagram of the folding roller group moving along the preset track to the second end;

[0071] Figure 23 Second state diagram of the folding roller group moving along the preset track to the second end;

[0072] Figure 24 Third state diagram of the folding roller group moving along the preset track to the second end;

[0073] Figure 25 State diagram of the folding roller group reaching the second end;

[0074] Figure 26 First state diagram of the folding roller group moving along the preset track to the first end;

[0075] Figure 27 Second state diagram of the folding roller group moving along the preset track to the first end;

[0076] Figure 28 Third state diagram of the folding roller group moving along the preset track to the first end;

[0077] Figure 29 State diagram of the folding roller group reaching the first end;

[0078] 1- strip; 2- sheet; 3- strip material; 4- first pole piece strip material; 5- diaphragm;

[0079] ​​10-Lamination table; 11-Folding guide roller group; 12-End track segment; 13-Connecting track segment; 14-Mounting seat; 15-Telescopic rod; 16-Swing arm; 17-Rotating shaft; 18-Base; 19-Swinging seat; 20-Hinged connecting rod; 21-Mounting rod; 22-Fixed roller; 23-Moving roller; 24-Fixed guide roller group; 25-Positioning block; 26-First pole piece strip unwinding roller; 27-Diaphragm composite roller; 28-Diaphragm unwinding roller; 29-Diaphragm tension mechanism; 30-Pole piece cutting mechanism; 31-Encoder; 32-Feeding roller group; 33-First pole piece strip buffer area; 34-Heating box; 35-Hot roller composite roller group;

[0080] 50-feeding belt; 51-feeding end; 51a-first feeding end; 51b-second feeding end; 52-driving member; 53-tension mechanism; 54-control member; 55-guide plate; 56-front conveying roller; 57-rear conveying roller; 58-conveyor belt; 59-receiving roller; 60-unwinding roller; 61-cutter mechanism; 62-driving roller group; 63-support platform; 64-encoder; 65-fixed roller; 66-tension movable roller; 67-sheet positioning member; 68-fixed roller; 69-moving roller. DETAILED DESCRIPTION

[0081] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0082] like Figure 1 FIG. 1 is a schematic diagram of the structure of an embodiment of the reciprocating folding mechanism of the present invention. The reciprocating folding mechanism of this embodiment includes:

[0083] Lamination table 10;

[0084] A reciprocating folding mechanism, used for reciprocatingly folding the strip material 1 in a strip shape on the lamination platform 10;

[0085] A folding positioning mechanism for controlling the positions of both ends of the strip 1 during its reciprocating folding;

[0086] The reciprocating folding mechanism of this embodiment includes a folding guide roller group 11 and a driving component for driving the folding guide roller group 11 to move along a preset track 12; the folding guide roller group 11 includes two folding guide rollers arranged opposite to each other for guiding the strip 1; the preset track includes two end track segments 12 respectively arranged corresponding to the two end positions of the strip 1 for reciprocating folding; among any two points on one end track segment 12, the distance between the point close to the other end track segment 12 and the stacking table 10 is greater than the distance between the other point and the stacking table 10; the driving component drives the folding guide roller group 11 to move reciprocally along the preset track to fold the strip 1 back and forth on the stacking table 10.

[0087] Further, when the folding guide roller group 10 is located at one end of the end rail section 12 far away from the other end rail section 12, the closest point of the folding guide roller group 10 to the laminating table 10 is flush with the laminating table 10 or the already laminated strip 1 on the uppermost layer, so that damage to the strip 1 can be avoided when the strip 1 is pressed and fixed by the folding positioning mechanism.

[0088] Further, in some embodiments, the highest points between the two end rail sections 12 and the laminating table 10 are smoothly connected. In other embodiments, connecting rail sections 13 are provided between the highest points between the two end rail sections 12 and the laminating table 10, and the connecting rail sections 13 are smoothly connected with the end rail sections 12.

[0089] Further, the preset track can be in various forms, such as:

[0090] The first: the end rail section 12 is a straight rail inclined relative to the laminating table 10. At this time, the driving assembly can include a mounting seat 14, the mounting seat 14 being provided with an extension rod 15 perpendicular to the laminating table 10, and the folding guide roller group 11 being mounted on the extension rod 15; the driving assembly further includes a parallel motion driving mechanism for driving the mounting seat 14 to move along a direction parallel to the laminating table 10 and a vertical motion driving mechanism for driving the extension rod 15 to extend or shorten. That is, the movement direction of the mounting seat 14 is perpendicular to the extension direction of the extension rod 15, and under the combined action of the linear motion of the mounting seat 14 and the extension motion of the extension rod 15, the folding guide roller group 11 can move along the end rail section 12 in a straight line relative to the laminating table 10. Specifically, by controlling the speed of the linear motion of the mounting seat 14 and the extension motion of the extension rod 15, the slope of the end rail section 12 relative to the laminating table 10 can be controlled. As shown in FIG. 2, it is a structural schematic diagram when the two end rail sections 12 are directly and smoothly connected; as shown in FIG. 3, it is a structural schematic diagram when the two end rail sections 12 have a connecting rail section 13 parallel to the laminating table 10. Of course, when the end rail section 12 is a straight rail inclined relative to the laminating table 10, the driving assembly can also adopt various other structural forms, which will not be repeated here. Figure 2 Figure 3 The first: the end rail section 12 is a straight rail inclined relative to the laminating table 10. At this time, the driving assembly can include a mounting seat 14, the mounting seat 14 being provided with an extension rod 15 perpendicular to the laminating table 10, and the folding guide roller group 11 being mounted on the extension rod 15; the driving assembly further includes a parallel motion driving mechanism for driving the mounting seat 14 to move along a direction parallel to the laminating table 10 and a vertical motion driving mechanism for driving the extension rod 15 to extend or shorten. That is, the movement direction of the mounting seat 14 is perpendicular to the extension direction of the extension rod 15, and under the combined action of the linear motion of the mounting seat 14 and the extension motion of the extension rod 15, the folding guide roller group 11 can move along the end rail section 12 in a straight line relative to the laminating table 10. Specifically, by controlling the speed of the linear motion of the mounting seat 14 and the extension motion of the extension rod 15, the slope of the end rail section 12 relative to the laminating table 10 can be controlled. As shown in FIG. 2, it is a structural schematic diagram when the two end rail sections 12 are directly and smoothly connected; as shown in FIG. 3, it is a structural schematic diagram when the two end rail sections 12 have a connecting rail section 13 parallel to the laminating table 10. Of course, when the end rail section 12 is a straight rail inclined relative to the laminating table 10, the driving assembly can also adopt various other structural forms, which will not be repeated here.

[0091] The second: the end rail section 12 is a circular arc rail. As shown in FIG. 4, it is a structural schematic diagram when the two end rail sections 12 are directly and smoothly connected; as shown in FIG. 5, it is a structural schematic diagram when the two end rail sections 12 have a connecting rail section 13 parallel to the laminating table 10. Figure 4 ​As shown, the driving assembly at this time can include a swing arm 16, the lower end of the swing arm 16 extending below the laminating table 10 and being rotatable relative to a rotation shaft 17, and the folding roller set 11 being installed at the upper end of the swing arm 16. In this way, the swing arm 16 is driven to rotate around the rotation shaft 17, and the running track of the folding roller set 11 is in the shape of a circular arc, i.e. the preset track of the folding roller set 11 is a circular arc track, and the circular arc track is divided into two segments of circular arc track from the highest point farthest from the laminating table 10, and the two segments of circular arc track can be respectively regarded as the end track segments 12.

[0092] Thirdly, the end track segments 12 are in the shape of a circular arc or an elliptical arc. At this time, the driving assembly can include a base 18 and a swing base 19, at least two double-hinged connecting rods 20 being arranged between the base 18 and the swing base 19, the base 18 and the swing base 19 being parallel to each other, and any two double-hinged connecting rods 20 being parallel to each other; the swing base 19 is provided with a mounting rod 21, and the folding roller set 11 is installed on the mounting rod 21. The driving assembly further includes a linear motion mechanism for driving the base 18 to move in a direction parallel to the laminating table 10 and a rotation driving mechanism for driving the double-hinged connecting rods 20 to rotate relative to the base 18. The linear motion of the base 18 and the rotation motion of the double-hinged connecting rods 20 are combined together to form the moving track line of the folding roller set 11, i.e. the track line of the preset track is obtained. Specifically, when the base 18 moves linearly between the first end and the second end of folding, the double-hinged connecting rods 20 always keep a vertical state with the base 18, and when the base 18 moves to the first end or the second end, the base 18 stops moving, and the double-hinged connecting rods 20 rotate relative to the base 18. At this time, the track line of the folding roller set 11 has a circular arc shape at both ends and a straight line in the middle, i.e. the end track segments 12 at both ends are in the shape of a circular arc, and the connecting track segment 13 in the middle has a straight line to connect the two end track segments 12, as shown in the figure. Figure 5 When the base 18 moves linearly between the first end and the second end of folding, the double-hinged connecting rods 20 rotate relative to the base 18, and if the time for the double-hinged connecting rods 20 to rotate uniformly from the starting position to the terminal position relative to the base 18 is equal to the time for the base 18 to move uniformly from the first end to the second end of folding, then the track line of the folding roller set 11 is in the shape of an elliptical arc, and the preset track in the shape of an elliptical arc is divided from the middle point to obtain two end track segments 12 in the shape of an elliptical arc, as shown in the figure. Figure 1of course, if the time for the double-hinged link 20 to rotate from the starting position to the ending position relative to the base 18 is less than the time for the base 18 to move from the folded first end to the second end at a constant speed, then the time t needs to be kept when the double-hinged link 20 is perpendicular to the base 18, the time t is equal to the difference between the time t1 for the base 18 to move from the folded first end to the second end at a constant speed and the time t2 for the double-hinged link 20 to rotate from the starting position to the ending position relative to the base 18 at a constant speed, then the trajectory line is formed as an elliptical arc at both ends and a straight line in the middle, the elliptical arc trajectory line at both ends is the end track segment 12, and the straight line trajectory line in the middle is the connecting track segment 13, as shown in Figure 6

[0093] Through the above three ways, a variety of typical preset track trajectory lines can be obtained, of course, the preset track trajectory line can also have other various trajectory line forms, which will not be repeated.

[0094] Further, the folding positioning mechanism includes positioning rods, positioning pins or positioning blocks 25 located at both end positions of the strip material 1 during folding back and forth, the folding positioning mechanism of the embodiment includes positioning blocks 25 located at both end positions of the strip material 1 during folding back and forth, by setting the positioning blocks 25 to press at the end position of the folded strip material 1, the strip material 1 can be positioned and folded, specifically, the positioning blocks 25 press on the uppermost layer of strip material 1. Of course, the folding positioning mechanism can also achieve the same technical purpose by using positioning rods and positioning pins, which will not be repeated.

[0095] Further, the reciprocating folding mechanism of the embodiment further includes a strip material buffering mechanism, the strip material buffering mechanism includes fixed rollers 22 located on both sides, a movable roller 23 and a tension mechanism for driving the movable roller 23 to move to control the strip material tension are arranged between the fixed rollers 22 on both sides, and the strip material 1 enters the reciprocating folding mechanism after passing through the buffering mechanism.

[0096] Further, the reciprocating folding mechanism of the embodiment further includes a laminated table moving drive mechanism for driving the laminated table 10 to move in a direction perpendicular to the table surface, the laminated table moving drive mechanism can be realized by using a screw thread and screw mechanism and a gear and rack mechanism, which will not be repeated. By setting the laminated table moving drive mechanism to drive the laminated table 10 to move in a direction perpendicular to the table surface, when the thickness of the folded strip material 1 is relatively thick, the laminated table 10 can be driven to move to make room.

[0097] Further, the reciprocating folding mechanism of the embodiment further includes a fixed guide roller group 24, the strip material enters the folding guide roller group 11 after being guided by the fixed guide roller group 24, achieving better guiding effect on the strip material 1.

[0098] ​The reciprocating folding mechanism of the embodiment drives the folding roller set to move reciprocally along the preset track by the driving assembly. When the folding roller set moves to the first end of the strip material reciprocally folded, the strip material located at the end of the first end of the strip material reciprocally folded is pressed and fixed by the folding positioning mechanism, and then the folding roller set is driven to move to the second end of the strip material reciprocally folded relative to the lamination table, and the strip material located at the end of the second end of the strip material reciprocally folded is pressed and fixed by the folding positioning mechanism again. The strip material is positioned and folded on the lamination table in this way, and the positions of the two ends of the folded strip material are precisely positioned and controlled by the folding positioning mechanism, so that not only the continuous folding can be realized, but also the folding precision can be improved. In addition, the two ends of the preset track are respectively provided with end track sections, and the distance between the end track sections and the lamination table gradually increases in the direction from the end to the middle. Therefore, when the folding roller set moves away from one end of the strip material reciprocally folded, the distance between the folding roller set and the lamination table gradually increases, so that the interference between the folding roller set and the strip material that has been folded is avoided. When the folding roller set reaches one end of the strip material reciprocally folded, the distance between the folding roller set and the lamination table gradually decreases, so that when the folding roller set reaches the end position of the corresponding end track section, the strip material guided by the folding roller set is flush with the lamination table or the strip material that has been laminated, so that the damage to the strip material can be avoided when the strip material is pressed and fixed by the folding positioning mechanism.

[0099] The specific implementation of the reciprocating folding method of the present application will be described in detail below in combination with the reciprocating folding mechanism of the embodiment.

[0100] The reciprocating folding method of the embodiment includes the following steps:

[0101] 11) The folding roller set 11 is located at the first end of the strip material reciprocally folded, and the strip material 1 at the first end is pressed and fixed by the folding positioning mechanism, as shown in FIG. 11. Figure 7

[0102] 12) The folding roller set is driven to move along the preset track by the driving assembly, so that the folding roller set moves to the second end position of the strip material reciprocally folded, and the strip material at the second end is pressed and fixed by the folding positioning mechanism, as shown in FIG. 12. Figures 8-11

[0103] 13) The folding roller set is driven to move along the preset track by the driving assembly, so that the folding roller set moves to the first end position of the strip material reciprocally folded, and the strip material at the first end is pressed and fixed by the folding positioning mechanism, as shown in FIG. 13. Figures 12-15

[0104] 14) The steps 12) to 13) are cycled until the folding is completed.

[0105] ​​​Furthermore, in step 12) and / or step 13), after the folding roller group moves a set n times between the first end and the second end of the strip to be folded back and forth, the lamination table is driven to move a distance s in a direction perpendicular to its table surface toward the side away from the folding roller group, and s = n*h, h is the thickness of the strip, and n ≥ 1.

[0106] Specifically, when producing batteries or capacitors, the first electrode sheet and the second electrode sheet can be interlaced on both sides of the diaphragm to form a strip. After the strip is folded back and forth on the lamination table, a layer of diaphragm is provided between adjacent first and second electrode sheets, thereby forming a battery or capacitor structure that can meet the production requirements of batteries or capacitors. Of course, the first electrode sheet and the second electrode sheet can also be interlaced on both sides of the solid electrolyte to form a strip. After the strip is folded back and forth on the lamination table, a layer of solid electrolyte is provided between adjacent first and second electrode sheets, thereby forming a solid battery or solid capacitor structure that can meet the production requirements of solid batteries or solid capacitors.

[0107] The specific implementation of the reciprocating stacking mechanism of the present invention will be described in detail below in conjunction with the reciprocating folding mechanism of this embodiment.

[0108] like Figure 16 FIG2 is a schematic diagram of the structure of an embodiment of a reciprocating laminating mechanism of the present invention. The reciprocating laminating mechanism of this embodiment includes a reciprocating folding mechanism and a sheet material conveying mechanism. The sheet material conveying mechanism is used to convey sheet material 2 and stack the sheet material 2 on the strip material 1 after each folding.

[0109] Specifically, a lamination area is formed between the two ends of the folded strip 1, and the sheet lamination feeding mechanism includes a sheet feeding mechanism for conveying the sheet 2 to the lamination area and a sheet positioning mechanism for positioning the sheet in the set lamination area.

[0110] Furthermore, the sheet feeding mechanism of this embodiment includes:

[0111] A feeding belt 50, wherein at least one end of the feeding belt is configured as a feeding end 51;

[0112] A feed drive mechanism is used to drive the feed end to move back and forth between its starting position and end position. When both ends of the feed belt are set as feed ends, the starting positions of the two feed ends are located at opposite ends of the lamination area; and:

[0113] When the feed end is at its starting position, the feed end is outside the laminate area and close to one end of the laminate area; when the feed end is at its end position, the feed end is inside the laminate area and close to the other end of the laminate area;

[0114] The feeding control mechanism is used to synchronize the movement of the sheet material with the feeding belt during the movement of the feeding end from its starting position to its end position, and to make the sheet material be separated from the feeding belt during the movement of the feeding end from its end position to its starting position.

[0115] Specifically, as shown in Figure 16 , when only one end of the feeding belt 50 is provided with the feeding end 51, the sheet material feeding mechanism is arranged at the opposite ends of the sheet stacking table 10, so as to meet the technical purpose of stacking the sheet material 2 on the to-and-fro folded belt material 1 from the two ends of the sheet stacking area respectively. Specifically, when the feeding end 51 is located at its starting position, the feeding end 51 is located outside the sheet stacking area and close to one end of the sheet stacking area; when the feeding end 51 is located at its end position, the feeding end 51 is located inside the sheet stacking area and close to the other end of the sheet stacking area, so as to meet the technical purpose of feeding the sheet material 2 from outside the sheet stacking area to inside the sheet stacking area. The feeding control mechanism of the embodiment is used to synchronize the movement of the sheet material 2 with the feeding belt 50 during the movement of the feeding end 51 from its starting position to its end position, and to make the sheet material 2 be separated from the feeding belt 50 during the movement of the feeding end 51 from its end position to its starting position. The sheet material positioning mechanism of the embodiment is used to position the sheet material 2 in the set sheet stacking area.

[0116] As shown in Figure 19 and 20 , when both ends of the feeding belt 50 are provided with the feeding end 51, the starting positions of the two feeding ends 51 are located at the opposite ends of the sheet stacking area, that is, the sheet material feeding mechanism is only provided with one at this time, and the technical purpose of stacking the sheet material 2 on the to-and-fro folded belt material 1 from the two ends of the sheet stacking area respectively can also be met. There are two ways to arrange the feeding end 51 at the two ends of the sheet stacking table 10: the first way is shown in Figure 19 , that is, there is a linkage relationship between the two feeding ends 51, that is, when one of the feeding ends 51 is located at its starting position, the other feeding end 51 is located at its end position; when one of the feeding ends 51 moves from its starting position to its end position, the other feeding end 51 moves from its end position to its starting position; when one of the feeding ends 51 moves from its end position to its starting position, the other feeding end 51 moves from its starting position to its end position. The second way is shown in Figure 20 , that is, a buffer area is arranged on the feeding belt 50, the buffer area is provided with a fixed roller 68 and a movable roller 69, the tension of the feeding belt 50 is controlled by the movable roller 69, that is, the tension mechanism 53 is formed in the buffer area at the same time; due to the existence of the buffer area, when the length of the feeding belt 50 in the buffer area is long enough, the feeding ends 51 at the two ends of the feeding belt 50 can be controlled respectively, that is, there is no linkage relationship between the feeding ends 51 arranged at the two ends of the feeding belt 50 respectively, that is, the feeding ends 51 arranged at the two ends of the feeding belt 50 can be controlled independently, and the control mode of each feeding end 51 is the same as that of the first embodiment. Figure 1The above-mentioned only corresponds to the situation when the feeding end 51 is arranged at one end of the feeding belt 50, and will not be repeated.

[0117] Further, the feeding driving mechanism comprises driving members 52, which are arranged one-to-one corresponding to the feeding ends 51. The driving members 52 are arranged below the corresponding feeding ends 51, and the feeding ends 51 move synchronously with the corresponding driving members 52. In this embodiment, the feeding ends 51 are fixedly connected with the corresponding driving members 52, so that synchronous movement can be achieved. Specifically, the feeding belt 50 is also provided with a tensioning mechanism 53, so that the feeding belt 50 can maintain sufficient tension during the movement of the feeding end 51 between the initial position and the terminal position.

[0118] Further, the feeding control mechanism comprises a control piece 54 corresponding to each driving piece 52 and moving synchronously with the driving piece 52, and the control piece 54 is arranged above the corresponding feeding end 51. The control piece 54 is used to make the sheet material 2 move synchronously with the feeding belt 50 during the movement of the feeding end 51 from the starting position to the end position, and the sheet material 2 can be separated from the feeding belt 50 during the movement of the feeding end 51 from the end position to the starting position. To achieve the technical purpose, the control piece 54 can be implemented in various ways. The first way is that the control piece 54 is provided with a gap control mechanism for adjusting the gap between the control piece 54 and the driving piece 52. By adjusting the gap between the control piece 54 and the driving piece 52, when the feeding end 51 moves from the starting position to the end position, the gap between the control piece 54 and the driving piece 52 can be reduced, and appropriate pressure is applied to the sheet material 2 to make it move synchronously with the feeding belt 50; when the feeding end 51 moves from the end position to the starting position, the gap between the control piece 54 and the driving piece 52 can be increased, i.e. no pressure is applied to the sheet material 2, so that the sheet material 2 can be separated from the feeding belt 50. The second way is that the control piece 54 is a control roller which can only rotate in one direction and the tangential velocity of the point closest to the feeding belt 50 during the rotation of the control roller points to the end position of the corresponding feeding end 51; in this way, when the feeding end 51 moves from the starting position to the end position, the control roller is subjected to the friction force applied by the sheet material 2 to the side of the corresponding feeding end 51, and the torque applied by the friction force to the control roller is opposite to the direction in which the control roller can rotate, so that the control roller does not rotate under the action of the friction force, i.e. the sheet material 2 does not slide on the feeding belt 50, and the sheet material 2 moves synchronously with the feeding belt 50; when the feeding end 51 moves from the end position to the starting position, the sheet material 2 is separated from the feeding belt 50, and the friction force applied to the control roller points to the side of the end position of the corresponding feeding end 51, and the torque applied by the friction force to the control roller is the same as the direction in which the control roller can rotate, so that the control roller rotates under the action of the friction force, and the sheet material 2 can be separated from the feeding belt 50. Of course, there are various ways to realize that the control roller can only rotate in one direction, such as using a motor to control the rotation direction of the control roller, or setting a ratchet on the rotating shaft of the control roller, and the like, which will not be repeated. In some embodiments, when the control piece 54 is a control roller, a gap control mechanism can also be arranged on the control piece 54. Of course, the gap control mechanism can be implemented in various ways, such as an electric cylinder, a threaded screw mechanism, and the like, which will not be repeated.

[0119] Further, in some embodiments, a guide piece 55 for guiding the sheet material 2 when it is separated from the feeding belt 50 is arranged below the feeding end 51, and the guide piece 55 moves synchronously with the driving piece 52. By arranging the guide piece 55, the sheet material 2 can be prevented from being damaged by excessive bending during the separation from the feeding belt 50.

[0120] Further, in some embodiments, the feeding belt 50 is provided with rollers or balls for rolling engagement with the sheet material 2, which can reduce the friction of the sheet material 2 during disengagement from the feeding belt 50 and avoid damage to the surface of the sheet material 2.

[0121] Further, the sheet material feeding mechanism of the present embodiment further comprises a sheet material conveying mechanism for conveying the sheet material 2 to the feeding end 51, and the sheet material conveying mechanism is provided in one-to-one correspondence with the feeding end 51. Specifically, the sheet material conveying mechanism of the present embodiment comprises a front conveying roller 56 and a rear conveying roller 57 respectively located at the front and rear ends, and a conveying belt 58 is provided between the front conveying roller 56 and the rear conveying roller 57; the feeding belt 21 is provided with a receiving roller 59, and the receiving roller 59 is arranged close to the front conveying roller 56. Of course, the sheet material conveying mechanism further comprises a sheet material conveying motor (not shown in the figure) for driving the front conveying roller 56 or the rear conveying roller 57 to rotate, which drives the conveying belt 58 to move and convey the sheet material 2 to the feeding end 51.

[0122] Further, the sheet material feeding mechanism of the present embodiment further comprises a sheet material slicing mechanism, which comprises a unwinding roller 60 for continuously unwinding the strip material, a cutter mechanism 61 for cutting the strip material to form the sheet material, and a driving roller set 62 for driving the strip material 3 to the cutter mechanism 61, and the cutter mechanism 61 is located between the rear conveying roller 57 and the driving roller set 62. By providing the sheet material slicing mechanism, the continuous strip material 3 can be cut into sheet materials 2. Preferably, a support table 63 is provided between the cutter mechanism 61 and the rear conveying roller 57 and between the cutter mechanism 61 and the driving roller set 62, respectively, to avoid the end of the strip material 3 from tilting downward and failing to smoothly enter the cutter mechanism 61 and the rear conveying roller 57. Specifically, the strip material 3 of the present embodiment is a second pole piece.

[0123] Preferably, in some embodiments, an encoder 64 for length measurement is provided between the driving roller set 62 and the unwinding roller 60, so as to ensure the dimensional accuracy of each sheet material 2.

[0124] Preferably, in some embodiments, a strip material buffer zone is provided between the encoder 64 and the unwinding roller 60 for buffering the strip material 3. The strip material buffer zone of the present embodiment comprises a fixed roller 65 and a tension movable roller 66, so that the unwinding roller 60 can continuously unwind at a set speed and will not be affected by the interval feeding of the sheet material 2.

[0125] Further, the sheet positioning mechanism of the embodiment includes a sheet positioning member 67 arranged at the end position close to the corresponding feeding end 51. The sheet positioning member 67 can be a sheet pressing rod, a sheet pressing pin, a sheet pressing block, etc. In the embodiment, the sheet positioning member 67 is a sheet pressing block. When the feeding end 51 moves to the end position, the sheet positioning member 67 is used to press and fix the end of the sheet 2 on the strip 1 that has been folded in the lamination area, so as to realize the lamination positioning of the sheet 2. During the movement of the feeding end 51 to the starting position, the sheet 2 is separated from the feeding strip 50.

[0126] Specifically, in some embodiments, the strip 1 is a diaphragm, and the sheets 2 fed by the feeding ends 51 at both ends of the lamination table 10 are first and second electrode sheets, respectively. The first and second electrode sheets are laminated on both sides of the diaphragm, thereby forming a battery or capacitor structure. In other embodiments, the strip 1 includes a first electrode sheet strip, and the sheet 2 is a second electrode sheet. The first electrode sheet strip is respectively compounded with a diaphragm or a solid electrolyte layer on both sides. Alternatively, the second electrode sheet is respectively compounded with a diaphragm or a solid electrolyte layer on both sides. Alternatively, one side of the first electrode sheet strip and one side of the second electrode sheet are respectively compounded with a diaphragm or a solid electrolyte layer. In this way, after the first electrode sheet strip and the second electrode sheet are laminated, the diaphragm or the solid electrolyte layer is arranged between adjacent first electrode sheet strips and second electrode sheets, thereby forming a battery or capacitor structure. In the embodiment, the strip 1 includes a first electrode sheet strip 4, and the first electrode sheet strip 4 is respectively compounded with a diaphragm 5 on both sides. That is, the first electrode sheet strip 4 is respectively compounded with a diaphragm 5 on both sides to form the strip 1. The strip feeding mechanism further includes a first electrode sheet strip unwinding roller 26 for continuously unwinding the first electrode sheet strip 4 and a diaphragm compounding mechanism for respectively compounding the diaphragm 5 on both sides of the first electrode sheet strip 4. The diaphragm compounding mechanism includes a diaphragm compounding roller 27 and a diaphragm unwinding roller 28. In some embodiments, a diaphragm tension mechanism 29 is arranged between the diaphragm compounding roller 27 and the diaphragm unwinding roller 28.

[0127] Specifically, for some first electrode strip materials with excellent folding performance, the first electrode strip material 4 can be directly folded back and forth on the lamination table 10 after the diaphragm 5 is compounded on both sides of the first electrode strip material 4. For some first electrode strip materials 4 with poor folding performance, especially those that will affect the product quality of the final shaped battery or capacitor after folding, the first electrode strip material 4 needs to be cut into pieces first, and then the diaphragm 5 is compounded to form the strip material 1. At this time, the diaphragm compounding roller 27 and the first electrode strip material unwinding roller 26 are provided with an electrode cutting mechanism 30 for cutting the first electrode strip material 4. The length of the first electrode strip material cut by the electrode cutting mechanism 30 is equal to the distance between the two end positions of the back-and-forth folding of the strip material 1. In this way, the length of the strip material 1 folded back and forth is equal to the length of the first electrode strip material after the first electrode strip material 4 is cut into pieces. At this time, the position of the strip material 1 folded back and forth can be controlled to be just between the two first electrode strip materials. In this way, continuous folding is realized by using flexible and foldable diaphragm 5, and the performance is not affected.

[0128] Preferably, in order to accurately control the cutting length of the first electrode strip material, an encoder 31 for measuring the cutting length of the first electrode strip material 4 is arranged between the electrode cutting mechanism 30 and the first electrode strip material unwinding roller 26. In order to continuously feed the first electrode strip material 4, a feeding roller group 32 for driving the electrode feeding is arranged between the encoder 31 and the electrode cutting mechanism 30. In order to enable the first electrode strip material unwinding roller 26 to continuously unwind the first electrode strip material 4 at a set speed, a first electrode strip material buffer area 33 is arranged between the encoder 31 and the first electrode strip material unwinding roller 26. The first electrode strip material buffer area 33 includes fixed rollers and movable rollers, and will not be described again.

[0129] Further, a hot pressing compounding mechanism is arranged between the diaphragm compounding roller 27 and the strip material folding mechanism to improve the compounding performance between the diaphragm 5 and the first electrode strip material 4. The hot pressing compounding mechanism of the present embodiment includes a heating box 34 for heating the strip material 1 and a hot roller pressing compounding roller group 35 for hot roller pressing the strip material 1.

[0130] The specific implementation of the reciprocating lamination method of the present application will be described in detail below in combination with the reciprocating lamination mechanism of the present embodiment.

[0131] The reciprocating lamination method of the present embodiment includes the following steps:

[0132] 21) The folding guide roller group is located at the first end of the back-and-forth folding of the strip material, and the folding positioning mechanism is used to press and fix the strip material at the first end, as shown in Figure 21 ;

[0133] 22) The piece-shaped piece material is stacked on the strip material by using the piece material conveying mechanism, as shown in Figure 21 ;

[0134] 23) driving the folding roller set to move along the preset track by the driving assembly, moving the folding roller set to the second end position of the strip material to be folded back and forth, and pressing and fixing the strip material at the second end by the folding positioning mechanism, as shown in Figures 22-25 ;

[0135] 24) stacking the sheet material in the form of a sheet on the strip material by the sheet material conveying mechanism, as shown in Figure 25 ;

[0136] 25) driving the folding roller set to move along the preset track by the driving assembly, moving the folding roller set to the first end position of the strip material to be folded back and forth, and pressing and fixing the strip material at the first end by the folding positioning mechanism, as shown in Figures 26-29 ;

[0137] 26) repeating steps 22) to 25) until the folding is completed.

[0138] Further, in steps 23) and / or 25), after the folding roller set moves between the first end and the second end of the strip material to be folded back and forth for a set number of N times, the sheet stacking table is driven to move in the second direction towards the side away from the folding roller set by a distance S, and S = N*H, H is the sum of the thickness of one layer of strip material and one layer of sheet material, and N ≥ 1.

[0139] Specifically, in steps 22) and 24), the method for stacking the sheet material in the form of a sheet on the strip material by the sheet material conveying mechanism includes the following steps:

[0140] (1) moving the feeding end 51 to its starting position; at this time, the sheet material stacking feeding mechanism is provided at both ends of the sheet stacking table 10, with the sheet material stacking feeding mechanism on the left being the first sheet material stacking feeding mechanism and the sheet material stacking feeding mechanism on the right being the second sheet material stacking feeding mechanism; the action process of the first sheet material stacking feeding mechanism will be described in detail below. Specifically, as shown in the state of Figure 21 , the feeding end 51 of the first sheet material stacking feeding mechanism is located at its starting position.

[0141] (2) after the sheet material 2 is fed to the feeding end, the feeding end 51 is driven to move towards its end position by the feeding driving mechanism, and the sheet material 2 is driven to move synchronously with the feeding belt 50 under the action of the feeding control mechanism. As shown in Figures 22-25 , the feeding end 51 of the first sheet material stacking feeding mechanism moves from its starting position towards its end position.

[0142] (3) after the feeding end 51 reaches its end position, the end of the sheet material 2 is positioned in the stacking area by the sheet positioning mechanism. As shown in Figure 25As shown, the feeding end 51 of the first sheet stack feeding mechanism reaches its end position, and the end of the sheet 2 is positioned and pressed against the stack area by the sheet positioning member 67.

[0143] (4) The feeding end 51 is driven to move towards its starting position, and the sheet 2 is gradually separated from the feeding belt 50 under the action of the feeding mechanism until it completely falls into the stack area. As shown, Figures 26-28 As shown, the feeding end 51 of the first sheet stack feeding mechanism moves from its end position towards its starting position, and the sheet 2 is gradually separated from the feeding belt 50 during this process.

[0144] (5) Continue to drive the feeding end 51 to move towards its starting position until the feeding end 51 returns to its starting position. As shown, Figure 29 As shown, the feeding end 51 of the first sheet stack feeding mechanism reaches its starting position.

[0145] Further, in order to enable the sheet positioning mechanism to position the end of the sheet 2 in the stack area, the following two methods can be used:

[0146] The first method: in step (2), when the sheet 2 is sent to the feeding end 51, the end of the sheet 2 is exposed outside the feeding end 51; in step (3), the sheet positioning mechanism is used to position the end of the sheet exposed outside the feeding end in the stack area.

[0147] The second method: in step (3), when the feeding end 51 reaches its end position, the feeding control mechanism is used to drive the sheet 2 to move, so that the end of the sheet 2 is exposed outside the feeding end, and then the sheet positioning mechanism is used to position the end of the sheet exposed outside the feeding end in the stack area.

[0148] That is, both methods can expose the end of the sheet 2 outside the feeding end 51, so that the sheet positioning mechanism can be used to position the end of the sheet exposed outside the feeding end in the stack area, that is, the sheet positioning member 37 can be used to press and position the end of the sheet exposed outside the feeding end in the stack area.

[0149] The above-described embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the present application are within the protection scope of the present application. The protection scope of the present application is subject to the claims.

Claims

1. A reciprocating folding mechanism, characterized in that: include: Lamination table; A reciprocating folding mechanism, used for reciprocatingly folding the strip material on the lamination table; A folding positioning mechanism for controlling the positions of both ends of the strip during its reciprocating folding; The reciprocating folding mechanism includes a folding guide roller group and a driving component for driving the folding guide roller group to move along a preset track; the folding guide roller group includes two folding guide rollers arranged opposite to each other for guiding the strip; the preset track includes two end track segments respectively arranged corresponding to the two end positions of the strip for reciprocating folding; among any two points on one of the end track segments, the distance between the point close to the other end track segment and the stacking table is greater than the distance between the other point and the stacking table; the driving component drives the folding guide roller group to move reciprocally along the preset track to fold the strip back and forth on the stacking table.

2. The reciprocating folding mechanism according to claim 1, characterized in that: When the folding guide roller group is located at one end of one of the end track segments away from the other end track segment, the folding guide roller is closest to the lamination table and is flush with the lamination table or the topmost laminated strip.

3. The reciprocating folding mechanism according to claim 1, characterized in that: There is a smooth transition connection between the two end track segments and the highest point farthest from the stacking platform; or a connecting track segment is provided between the two end track segments and the highest point farthest from the stacking platform, and there is a smooth transition between the connecting track segment and the end track segment.

4. The reciprocating folding mechanism according to claim 1, characterized in that: The end track section is a straight track that is tilted relative to the lamination platform.

5. The reciprocating folding mechanism according to claim 4, characterized in that: The driving assembly includes a mounting seat, a telescopic rod perpendicular to the stacking platform is provided on the mounting seat, and the folding guide roller group is installed on the telescopic rod; the driving assembly also includes a parallel motion driving mechanism for driving the mounting seat to move in a direction parallel to the stacking platform and a vertical motion driving mechanism for driving the telescopic rod to extend or shorten.

6. The reciprocating folding mechanism according to claim 1, characterized in that: The end track section is an arc-shaped track.

7. The reciprocating folding mechanism according to claim 6, characterized in that: The driving assembly includes a swing arm, the lower end of which extends below the stacking platform and is rotatable relative to a rotating shaft, and the folding guide roller group is installed on the upper end of the swing arm.

8. The reciprocating folding mechanism according to claim 1, characterized in that: The end track segment is a circular arc track or an elliptical arc track.

9. The reciprocating folding mechanism according to claim 8, characterized in that: The driving assembly includes a base and a swing seat, at least two double-hinged connecting rods are provided between the base and the swing seat, the base and the swing seat are parallel to each other, and any two of the double-hinged connecting rods are parallel to each other; a mounting rod is provided on the swing seat, and the folding guide roller group is mounted on the mounting rod; The driving assembly further includes a linear motion mechanism for driving the base to move in a direction parallel to the laminating table and a rotation driving mechanism for driving the double-hinged connecting rod to rotate relative to the base.

10. The reciprocating folding mechanism according to claim 1, characterized in that: The folding and positioning mechanism comprises a positioning rod, a positioning pressure needle or a positioning pressure block respectively located at two end positions of the strip material for reciprocating folding.

11. The reciprocating folding mechanism according to claim 1, characterized in that: It also includes a strip material caching mechanism, which includes fixed rollers located on both sides, a movable roller and a tension mechanism for driving the movable roller to move to control the tension of the strip material are provided between the fixed rollers on both sides, and the strip material enters the reciprocating folding mechanism after passing through the caching mechanism.

12. The reciprocating folding mechanism according to claim 1, characterized in that: It also includes a lamination table moving drive mechanism for driving the lamination table to move in a direction perpendicular to its table surface.

13. The reciprocating folding mechanism according to claim 1, characterized in that: It also includes a fixed guide roller group, and the strip material enters the folding guide roller group after being guided by the fixed guide roller group.

14. A reciprocating folding method, characterized in that: The steps include: 11) Position the folding guide roller assembly at the first end of the strip material where it is folded back and forth, and use the folding positioning mechanism to press and secure the strip material at the first end; 12) Using the driving assembly to drive the folding guide roller group to move along the preset track, so that the folding guide roller group moves to the second end position of the strip material for reciprocating folding, and using the folding positioning mechanism to press and fix the strip material at the second end; 13) Using the driving assembly to drive the folding guide roller group to move along the preset track, so that the folding guide roller group moves to the first end position of the strip material for reciprocating folding, and using the folding positioning mechanism to press and fix the strip material at the first end; 14) Repeat steps 12) to 13) until the folding is complete.

15. The reciprocating folding method according to claim 14, characterized in that: In step 12) and / or step 13), after the folding roller group moves a set number of n times between the first end and the second end of the strip to be folded back and forth, the laminating table is driven to move a distance s in a direction perpendicular to its table surface toward the side away from the folding roller group, where s=n*h, h is the thickness of the strip, and n≥1.

16. A reciprocating lamination mechanism, characterized in that: It comprises the reciprocating folding mechanism and the sheet material conveying mechanism as described in any one of claims 1 to 7, wherein the sheet material conveying mechanism is used to convey sheet material and to stack the sheet material on the belt material in sequence after each folding of the belt material.

17. The reciprocating lamination mechanism according to claim 16, wherein: A lamination area is formed between the two ends of the strip material that is folded back and forth. The sheet lamination feeding mechanism includes a sheet material feeding mechanism for conveying the sheet material to the lamination area and a sheet material positioning mechanism for positioning the sheet material in the set lamination area.

18. The reciprocating lamination mechanism according to claim 17, wherein: The sheet material feeding mechanism comprises: A feeding belt, wherein at least one end of the feeding belt is set as a feeding end; a feed drive mechanism for driving the feed end to move back and forth between its starting position and end position; when both ends of the feed belt are set as feed ends, the starting positions of the two feed ends are respectively located at opposite ends of the lamination area; and: When the feeding end is at its starting position, the feeding end is outside the lamination area and close to one end of the lamination area; when the feeding end is at its end position, the feeding end is inside the lamination area and close to the other end of the lamination area; The feeding control mechanism is used to make the sheet material move synchronously with the feeding belt when the feeding end moves from its starting position to the end position, and to make the sheet material detach from the feeding belt when the feeding end moves from its end position to the starting position.

19. The reciprocating lamination mechanism according to claim 18, wherein: The sheet positioning mechanism includes a sheet positioning member, which is arranged at an end position close to the corresponding feeding end, and the sheet positioning member includes a sheet pressing rod, a sheet pressing needle or a sheet pressing block.

20. A reciprocating lamination method, characterized in that: The steps include: 21) Position the folding guide roller assembly at the first end of the strip material where it is folded back and forth, and use the folding positioning mechanism to press and secure the strip material at the first end; 22) Using the sheet conveying mechanism to stack the sheet material on the belt material; 23) Using the driving assembly to drive the folding guide roller assembly to move along the preset track, so that the folding guide roller assembly moves to the second end position of the strip material for reciprocating folding, and using the folding positioning mechanism to press and fix the strip material at the second end; 24) Using the sheet material conveying mechanism to stack the sheet material on the belt material; 25) Using the driving assembly to drive the folding guide roller assembly to move along the preset track, so that the folding guide roller assembly moves to the first end position of the strip material for reciprocating folding, and using the folding positioning mechanism to press and fix the strip material at the first end; 26) Repeat steps 22) to 25) until the folding is complete.

21. The reciprocating lamination method according to claim 20, characterized in that: In step 23) and / or step 25), after the folding roller group moves a set number of times N between the first end and the second end of the strip material for reciprocal folding, the stacking table is driven to move a distance S along the second direction toward the side away from the folding roller group, and S=N*H, H is the sum of the thicknesses of a layer of strip material and a layer of sheet material, and N≥1.

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