Welding tape laying device, stacking equipment and stacking method

Abstract

The present invention discloses a welding tape laying device, stacking equipment and stacking method, wherein the welding tape laying device comprises a movable main body and at least two laying mechanisms arranged on the movable main body, wherein each of the laying mechanisms can clamp and release a group of parallel welding tapes, and each of the laying mechanisms is arranged to be able to translate relative to the movable main body. The technical solution provided by the present invention can carry at least two groups of welding tapes at a time for laying by the welding tape laying device, which greatly improves the laying efficiency of the welding tapes, thereby improving the production efficiency of the battery string.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cell self-production, and in particular to a welding tape laying device, stacking equipment and a stacking method. Background Art

[0002] In the production process of battery assemblies, there is a process of stacking and welding battery cells and welding ribbons to form a battery string. Specifically, the battery cells are stacked by using a battery cell handling device to transport the battery cells to a welding conveyor device and a welding ribbon providing device to lay welding ribbons on the welding conveyor device.

[0003] At present, the welding tape providing device for laying welding tape specifically includes two welding tape traction mechanisms, each welding tape traction mechanism traction and cuts the welding tape and then lays it on the welding conveyor line, and the two welding tape traction mechanisms act alternately in a cycle.

[0004] However, the welding tape pulling stroke is long, and only one set of welding tape can be pulled and laid at a time, which is inefficient. While the battery cell handling device that cooperates with it is more efficient, the battery cell handling device needs to wait for the welding tape pulling mechanism to finish laying before it can move, which wastes time. Summary of the invention

[0005] The purpose of the present invention is to provide a welding strip laying device, stacking equipment and stacking method to solve the problem of low welding strip laying efficiency in the current battery string production process.

[0006] In order to achieve the above-mentioned objectives, the present invention provides a welding tape laying device on one hand, which includes a movable body and at least two laying mechanisms arranged on the movable body, wherein each of the laying mechanisms includes a device capable of clamping and releasing a group of parallel welding tapes, and each of the laying mechanisms is configured to be able to translate relative to the movable body.

[0007] Preferably, each of the laying mechanisms is configured to be able to rise and fall relative to the mobile body.

[0008] Preferably, each of the laying mechanisms comprises a mounting frame and a plurality of clamps arranged side by side on the mounting frame for clamping the welding strip.

[0009] According to another aspect of the present invention, there is further provided a stacking device, the stacking device comprising a welding conveying device, a battery cell handling device and the welding ribbon laying device as described above;

[0010] Among them, at least two laying mechanisms of the welding tape laying device cooperate with the battery cell handling device in sequence to stack the battery cells and welding tapes and lay them on the welding conveying device.

[0011] Preferably, the stacking equipment comprises at least two welding tape laying devices, and the at least two welding tape laying devices are moved alternately and cyclically to the welding conveying device to lay the welding tape.

[0012] Preferably, the stacking device also includes a solder tape cutting device, which is configured to cut the solder tape into at least two sections. The solder tape laying device is configured to move to the solder tape cutting device, and enables each of the laying mechanisms to clamp a corresponding section of the solder tape from the solder tape cutting device.

[0013] Preferably, the welding ribbon cutting device comprises:

[0014] A welding strip pulling mechanism, wherein the welding strip pulling mechanism is configured to pull the welding strip;

[0015] A cutting mechanism, at least two of which are provided, each of which is used to cut a section of the welding strip;

[0016] A clamping mechanism, each of the cutting mechanisms is correspondingly provided with the clamping mechanism, and the clamping mechanism is configured to clamp the welding strip when the cutting mechanism cuts the welding strip.

[0017] Preferably, the welding conveying device comprises a conveyor belt, the first end of the conveyor belt is configured to be able to stepwise extend in a direction away from the second end and to stepwise return in the direction toward the second end, wherein each time the conveyor belt steps a predetermined length in the direction away from the second end, the conveyor belt flips upward at the first end by a preset length, so that the upper surface of the conveyor belt of the predetermined length forms an empty loading station, and the battery cell handling device and the solder strip laying device lay the battery cells and solder strips at the loading station.

[0018] According to yet another aspect of the present invention, a stacking method is further provided, the stacking method comprising:

[0019] Controlling the welding tape laying device to clamp at least two groups of welding tapes and move them to the welding conveying device, wherein each group of welding tapes is clamped by a laying mechanism of the welding tape laying device;

[0020] Each of the laying mechanisms is controlled to move independently to lay the welding tape on the welding conveyor device, and the battery cell transporting device lays the first one or two of the battery cells and tooling on the welding conveyor device. The laying mechanism cooperates with the battery cell transporting device to stack the battery cells and the welding tape or to stack the battery cells, tooling and welding tape.

[0021] Preferably, the welding tape laying devices are provided with two;

[0022] The controlling of the welding tape laying device to clamp at least two groups of welding tapes and move them to the welding conveying device is specifically: controlling the two welding tape laying devices to move to the welding conveying device cyclically and alternately.

[0023] Preferably, the stacking method further comprises: pulling a group of welding ribbons to extend and cutting the extended welding ribbons into at least two sections;

[0024] Each of the laying mechanisms of the welding tape laying device clamps a section of cut welding tape.

[0025] Preferably, before controlling each of the laying mechanisms to independently move to lay the welding ribbon on the welding conveyor device, and the cell transport device laying the first one or both of the cell and the tooling on the welding conveyor device, the method further comprises:

[0026] Controlling the first end of the conveyor belt of the welding conveyor device to extend in a stepwise manner in a direction away from the second end, wherein each time the conveyor belt steps in a predetermined length in the direction away from the second end, the conveyor belt turns upward by a preset length at the first end, so that an upper surface of the conveyor belt of the predetermined length forms an empty loading station;

[0027] The battery cell transport device and the laying mechanism lay the battery cells and welding strips on the loading station, or lay the battery cells, tooling and welding strips on the loading station.

[0028] In the technical solution provided by the present invention, a welding tape laying device having at least two laying mechanisms is used to lay welding tapes. During the laying process, the welding tape laying device can transport at least two groups of welding tapes to the welding conveying device at a time through the laying mechanism, and then each laying mechanism cooperates with the battery cell conveying device in turn to lay the welding tape, which greatly improves the laying efficiency of the welding tape, thereby improving the production efficiency of the battery string. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a stacking device according to one embodiment of the present invention;

[0030] Figure 2 Another schematic diagram of the structure of the stacking device provided by the present invention;

[0031] Figure 3 A schematic structural diagram of a welding conveying device according to one embodiment of the present invention;

[0032] Figure 4 FIG. 4 is a schematic structural diagram of a welding conveying device according to another embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1-welding tape laying device; 11-moving body; 12-laying mechanism; 2-welding tape cutting device; 21-welding tape traction mechanism; 22-cutting mechanism; 23-clamping mechanism; 3-welding conveying device; 31-conveyor belt; 32-first guide roller; 33-second guide roller; 34-tensioning roller; 35-active roller; 36-stepping platform; 37-fixed platform; 38-driving roller; 39-driven roller; 4-welding tape; 5-battery cell; 6-tooling. DETAILED DESCRIPTION

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present disclosure will be more comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0036] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known structures, methods, devices, implementations, materials or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0037] For ease of description, spatially relative terms such as "upper", "lower", "left", "right", etc. may be used herein to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the elements described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can also be positioned in other ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used here can be interpreted accordingly.

[0038] The present invention provides a welding tape laying device, such as Figure 1 and Figure 2The welding tape laying device 1 shown in the figure comprises a movable mobile body 11 and at least two laying mechanisms 12 arranged on the mobile body 11, wherein each of the laying mechanisms 12 can clamp and release a group of parallel welding tapes, and each of the laying mechanisms 12 is arranged to be able to translate relative to the mobile body 1. Preferably, each of the laying mechanisms 12 is arranged to be able to rise and fall relative to the mobile body 11.

[0039] Each of the laying mechanisms 12 may be configured to include a mounting frame capable of translating and / or lifting relative to the movable body 11 and a plurality of clamps arranged side by side on the mounting frame for clamping the welding strip.

[0040] The specific process of laying the welding tape using the welding tape laying device 1 is as follows: first, the welding tape laying device 1 clamps at least two groups of welding tapes (each laying mechanism 12 clamps a group of welding tapes), and then controls the mobile body 11 to move each laying mechanism 12 to the welding conveying device 3, and the first laying mechanism 12 moves independently relative to the mobile body 11 (translation, or translation and lifting) to lay the welding tape on the welding conveying device 3, and then the battery cell handling device lays the battery cell, and the second laying mechanism 12 moves independently relative to the mobile body 11 to lay the welding tape, and the battery cell handling device lays another battery cell... Each laying mechanism 12 and the battery cell handling device alternately lay the welding tape and the battery cell, so that the battery cell is stacked on the second half of the welding tape, and the first half of the second group of welding tapes is stacked on the first battery cell, and they are stacked in sequence to form a battery string. Among them, during the laying process, tooling can be further used to press and position the welding tape on the battery cell.

[0041] The technical solution provided by the present invention adopts a welding tape laying device 1 with at least two laying mechanisms 12 to lay welding tapes. During the laying process, the welding tape laying device 1 can transport at least two groups of welding tapes 4 to the welding conveying device 3 at a time through the laying mechanism 12, and then each laying mechanism 12 cooperates with the battery cell conveying device in turn to lay the welding tape, which greatly improves the laying efficiency of the welding tape, thereby improving the production efficiency of the battery string.

[0042] According to another aspect of the present invention, there is further provided a stacking device, the stacking device comprising a welding conveying device, a battery cell handling device and the welding ribbon laying device 1 as described above;

[0043] Among them, at least two laying mechanisms 12 of the welding tape laying device 1 cooperate with the battery cell handling device in sequence to stack the battery cells and welding tapes and lay them on the welding conveying device 3.

[0044] In a preferred embodiment of the present invention, the stacking equipment comprises at least two welding tape laying devices 1, and the at least two welding tape laying devices 1 are alternately and cyclically moved to the welding conveying device 3 to lay welding tapes.

[0045] Figure 1 It is shown that the stacking device is provided with two solder strip laying devices 1, and each solder strip laying device 1 is provided with at least two laying mechanisms 12. When one of the solder strip laying devices 1 lays the solder strip on the welding conveyor device 3, the other solder strip laying device 1 clamps the solder strip (moves to the solder strip cutting device 2 to clamp the cut solder strip as described below).

[0046] exist Figure 1 In the illustrated embodiment, the stacking device further includes a solder tape cutting device 2, which is configured to cut the solder tape 4 into at least two sections, and the solder tape laying device 1 is configured to move to the solder tape cutting device 2, and enables each of the laying mechanisms 12 to clamp a corresponding section of the solder tape from the solder tape cutting device 2.

[0047] Specifically, the welding ribbon cutting device 2 comprises:

[0048] A welding strip pulling mechanism 21, wherein the welding strip pulling mechanism 21 is configured to pull the welding strip 4;

[0049] A cutting mechanism 22, at least two of which are provided, each of which is used to cut a section of the welding strip 4;

[0050] A clamping mechanism 23 , each of the cutting mechanisms 22 is correspondingly provided with the clamping mechanism 23 , and the clamping mechanism 23 is configured to clamp the welding strip 4 when the cutting mechanism 22 cuts the welding strip.

[0051] The cutting mechanism 22 includes a carrier and a cutter for carrying the welding strip, the cutter can be provided separately or mounted on the carrier, the clamping mechanism 23 includes a carrier and a chuck for carrying the welding strip, the chuck can be provided separately or mounted on the carrier, and the cutting mechanism 22 and the clamping mechanism 23 are provided with guide grooves for guiding and limiting the welding strip on the carriers, respectively. Figure 2 When cutting the welding strip 4, the welding strip pulling mechanism 21 pulls the welding strip 4 to a predetermined position so that the welding strip 4 is laid on each carrier, and then the cutting mechanism 22 and the clamping mechanism 23 rise, or the welding strip pulling mechanism 21 falls, and the welding strip 4 is limited in the guide groove of the carrier. Then the clamping head of the clamping mechanism 23 clamps the welding strip, and the cutting knife of the cutting mechanism 22 rises to cut the welding strip from bottom to top.

[0052] The welding tape laying device 1 moves to the welding tape cutting device 2, and each laying mechanism 12 corresponds to each section of the cut welding tape and clamps the corresponding welding tape.

[0053] In this embodiment, the structure of the welding conveying device 3 is as follows: Figure 2As shown, it includes a conveyor belt 31, the first end of which is configured to be able to stepwise extend in a direction away from the second end and to stepwise return in the direction of the second end, wherein each time the conveyor belt 31 steps a predetermined length in the direction away from the second end, the conveyor belt 31 flips upward at the first end by a preset length, so that the upper surface of the conveyor belt 31 of the predetermined length forms an empty loading station, and the battery cell handling device and the solder strip laying device 1 lay the battery cells and solder strips at the loading station.

[0054] Specifically, in one embodiment, Figure 2 and Figure 3 As shown, the welding conveying device 1 includes a conveyor belt 31, a base, a fixed platform 37, a stepping platform 36 and a conveyor belt driving mechanism for driving the conveyor belt 31, the fixed platform 37 is fixedly connected to the base, a welding station is formed above the fixed platform 37, and is used to convey the stacked battery cells and welding strips to the welding station for welding, the stepping platform 36 is slidably connected to the base, the conveyor belt 31 is arranged on the fixed platform 37 and the stepping platform 36, and the stepping platform 36 is configured to be able to step toward or away from the fixed platform 37 in the conveying direction of the conveyor belt 31;

[0055] When the stepping platform 36 moves away from the fixed platform 37 ( Figure 3 The conveyor belt 31 is turned over from bottom to top at the end of the stepping platform 36 away from the fixed platform 37, so that the upper surface of the conveyor belt 31 is extended in a step-by-step manner along the stepping platform 36 in a direction away from the fixed platform 37.

[0056] Further, such as Figure 3 As shown, the conveyor belt driving mechanism for driving the conveyor belt 31 includes a driving roller 35, a first guide roller 32, a second guide roller 33 and a tensioning roller 34;

[0057] The driving roller 35 is arranged at the end of the fixed platform 37 away from the stepping platform 36, the first guide roller 32 is located at the end of the stepping platform 36 away from the fixed platform 37, and the first guide roller 32 and the second guide roller 33 are installed on the stepping platform 36, the tensioning roller 34 is located below the first guide roller 32 and the second guide roller 33, and the tensioning roller 34 is arranged to be able to move back and forth along the conveying direction of the conveyor belt 31 to tension the conveyor belt 31; the conveyor belt 31 is wound around the driving roller 35, the first guide roller 32, the second guide roller 33 and the tensioning roller 34 in sequence, wherein the second guide roller 33 is located on the transmission surface of the conveyor belt 31;

[0058] When the stepping platform 36 moves away from the fixed platform 37, the first guide roller 32 and the second guide roller 33 move with the stepping platform 36 and guide the conveyor belt 31 to turn upward and extend from below. The tensioning roller 34 can be adjusted in advance to tension the conveyor belt. When the stepping platform 36 drives the first guide roller 32, the second guide roller 33 and the conveyor belt 31 to step, the tensioning roller 34 usually does not need to be adjusted. Of course, if the conveyor belt 31 is loose, the position of the tensioning roller 34 can also be adjusted to tension it.

[0059] It is understandable that the method of making the conveyor belt 31 stepwise extend to one end to form an empty loading station is not limited to the method of driving one end of the conveyor belt to turn upward and extend by sliding the stepping platform, and can also be adopted, for example Figure 4 The embodiment shown.

[0060] like Figure 4 As shown, the welding conveying device 1 includes a conveying mechanism and a translation driving mechanism for driving the conveying mechanism to translate, the conveying mechanism includes a base, a driving roller 38, a driven roller 39 and the conveying belt 31, the driving roller 38 and the driven roller 39 are installed on the base, and the two ends of the conveying belt 31 are respectively wound around the driving roller 38 and the driven roller 39; the translation driving mechanism (not shown in the figure) is connected to the base to drive the base to move back and forth along the conveying direction of the conveying belt 31;

[0061] When the conveying device moves stepwise from the second end toward the first end under the drive of the translation drive mechanism, the conveying belt 31 moves stepwise toward the second end by the same distance, thereby forming an empty loading station at the first end of the conveying belt 31. Figure 3 As shown in the figure, the translation drive mechanism drives the conveying device to move at a speed v1 and in the direction indicated by the left arrow, while the conveyor belt 31 moves at a speed v1 and in the direction indicated by the right arrow. In this way, in the process of the conveyor belt 31 stepping toward the first end (i.e., in the left direction), the first end portion of the conveyor belt is always in an empty state, forming a loading station for receiving battery cells and solder strips.

[0062] The welding conveying device 3 provided by the present invention is provided with a conveyor belt 31 which can be extended step by step toward one end of the welding tape laying device 1 to form an empty loading station. Each time the conveyor belt 31 is extended step by step, the welding tape laying device 1 and the battery cell transporting device are laid once. When a preset number of welding tapes and battery cells are laid on the conveyor belt 31, the conveyor belt 31 transports the stacked welding tapes and battery cells to the welding station for welding.

[0063] According to the following Figure 1The illustrated embodiment describes the specific process of stacking welding ribbons and battery strings using the stacking equipment provided by the present invention.

[0064] First, the welding ribbon pulling device 21 of the welding ribbon cutting device 2 pulls the welding ribbon 4 to extend to the cutting position, the clamping mechanism 23 clamps the welding ribbon 4, and the cutting mechanism 23 cuts the welding ribbon into at least two sections.

[0065] The welding tape laying device 1 moves to the welding tape cutting device 2, and each laying mechanism 12 moves to the top of a section of welding tape and clamps the section of welding tape;

[0066] The welding tape laying device 1 clamps the welding tape and moves it to the welding conveyor 3. The conveyor belt 31 of the welding conveyor 3 is extended stepwise to one end to form an empty loading station. The first laying mechanism 12 on the welding tape laying device 1 moves corresponding to the moving body 11, and the first group of welding tapes is laid on the loading station of the conveyor belt 31. The battery cell handling device carries the first battery cell 5 and places the first battery cell 5 on the second half of the first group of welding tapes. The battery cell handling device can be configured to be able to carry the battery cell 5 and The tooling 6 is pressed against the front half of the welding tape to position the battery cell 5 when the battery cell 5 is placed on the rear half of the welding tape. Of course, an independent tooling transport device can also be provided to transport the tooling 6. Then the second laying mechanism 12 lays the second set of welding tapes, so that the front half of the second set of welding tapes is pressed against the top of the first battery cell 5. The battery cell transport device transports the next battery cell 5 and the tooling 6 and stacks them on the previous set of welding tapes. Then the third laying mechanism 12 and the battery cell transport device once again alternately lay the welding tapes and the battery cells.

[0067] in, Figure 1 There are two solder strip laying devices 1, one of which is laying solder strips on the welding conveyor 3, while the other solder strip laying device 1 can move to the solder strip cutting position to clamp the cut solder strips. The two solder strip laying devices 1 are alternately moved to the welding conveyor 3 to lay solder strips, which can improve the stacking efficiency of the battery cells and solder strips.

[0068] When the conveyor belt 31 of the welding conveyor device 3 steps toward one end by a preset number of steps so that the battery cells and welding tapes laid reach a preset number, the conveyor belt 31 conveys the preset number of welding tapes and battery cells to the welding station for welding.

[0069] According to another aspect of the present invention, there is also provided a stacking method, the stacking method comprising:

[0070] Controlling the welding tape laying device 1 to clamp at least two groups of welding tapes and move them to the welding conveying device 3, wherein each group of welding tapes is clamped by a laying mechanism 12 of the welding tape laying device 1;

[0071] Control each of the laying mechanisms 12 to move independently to lay the welding tape on the welding conveyor 3, and control the cell handling device to lay the first one or two of the cell and tooling on the welding conveyor 1. The laying mechanism 12 cooperates with the cell handling device to stack the cell and the welding tape or to stack the cell, tooling and welding tape.

[0072] Preferably, the welding tape laying devices are provided with two;

[0073] The controlling the welding tape laying device 1 to clamp at least two groups of welding tapes and move them to the welding conveying device 3 specifically includes: controlling the two welding tape laying devices 1 to move to the welding conveying device 3 in a cyclic and alternating manner.

[0074] The stacking method further comprises: pulling a group of welding ribbons to extend and cutting the extended welding ribbons into at least two sections;

[0075] Each of the laying mechanisms 12 of the solder tape laying device 1 clamps a section of cut solder tape.

[0076] Before controlling each of the laying mechanisms 12 to independently move and lay the welding ribbon on the welding conveyor 3, and before the cell transport device lays the cell and the tooling on the welding conveyor 3, or both, the method further comprises:

[0077] Controlling the first end of the conveyor belt 31 of the welding conveyor device 3 to extend in a stepwise manner in a direction away from the second end, wherein each time the conveyor belt 31 steps in a predetermined length in the direction away from the second end, the conveyor belt 31 turns upward at the first end by a preset length, so that an upper surface of the conveyor belt 31 of the predetermined length forms an empty loading station;

[0078] The cell conveying device and the laying mechanism 12 lay the cell and the welding ribbon on the loading station, or lay the cell, the tooling and the welding ribbon on the loading station.

[0079] The stacking method provided by the present invention can be implemented using the stacking device as described above, and its specific implementation process will not be further described here.

[0080] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A stacking device, characterized in that: The stacking device comprises a welding conveying device, a cell handling device and a welding tape laying device; the welding tape laying device comprises a movable moving body and at least two laying mechanisms arranged on the moving body, wherein each of the laying mechanisms can clamp and release a group of parallel welding tapes, and each of the laying mechanisms is arranged to be able to translate relative to the moving body; the at least two laying mechanisms of the welding tape laying device cooperate with the cell handling device in turn to stack the cell and the welding tape and lay them on the welding conveying device; The stacking equipment comprises at least two welding tape laying devices, and the at least two welding tape laying devices are alternately and cyclically moved to the welding conveying device to lay welding tapes; The stacking device further comprises a welding tape cutting device, wherein the welding tape cutting device is configured to cut the welding tape into at least two sections, and the welding tape laying device is configured to move to the welding tape cutting device, and each of the laying mechanisms respectively clamps a corresponding section of welding tape from the welding tape cutting device; The welding strip cutting device comprises: A welding strip traction mechanism, wherein the welding strip traction mechanism is configured to traction the welding strip; A cutting mechanism, at least two of which are provided, each of which is used to cut a section of the welding strip; A clamping mechanism, each of the cutting mechanisms is correspondingly provided with the clamping mechanism, and the clamping mechanism is configured to clamp the welding strip when the cutting mechanism cuts the welding strip.

2. The stacking device according to claim 1, characterized in that: Each of the laying mechanisms is configured to be able to rise and fall relative to the mobile body.

3. The stacking device according to claim 1, characterized in that: Each of the laying mechanisms comprises a mounting frame and a plurality of clamping claws arranged side by side on the mounting frame for clamping the welding strip.

4. The stacking device according to any one of claims 1 to 3, characterized in that: The welding conveying device includes a conveyor belt, a first end of which is configured to be able to stepwise extend in a direction away from the second end and to stepwise return in a direction toward the second end, wherein each time the conveyor belt steps a predetermined length in the direction away from the second end, the conveyor belt flips upward at the first end by a preset length, so that an upper surface of the conveyor belt of the predetermined length forms an empty loading station, and the battery cell handling device and the solder strip laying device lay the battery cells and solder strips at the loading station.

5. A stacking method, characterized in that: Using the stacking device as described in any one of claims 1 to 4, the stacking method comprises: Controlling the welding tape laying device to clamp at least two groups of welding tapes and move them to the welding conveying device, wherein each group of welding tapes is clamped by a laying mechanism of the welding tape laying device; Each of the laying mechanisms is controlled to move independently to lay the welding tape on the welding conveyor device, and the battery cell transporting device lays the first one or two of the battery cells and tooling on the welding conveyor device. The laying mechanism cooperates with the battery cell transporting device to stack the battery cells and the welding tape or to stack the battery cells, tooling and welding tape.

6. The stacking method according to claim 5, characterized in that: The welding tape laying devices are provided with two; The controlling the welding tape laying device to clamp at least two groups of welding tapes and move them to the welding conveying device is specifically: controlling the two welding tape laying devices to move to the welding conveying device cyclically and alternately.

7. The stacking method according to claim 5, characterized in that: The stacking method further comprises: pulling a group of welding ribbons to extend and cutting the extended welding ribbons into at least two sections; Each of the laying mechanisms of the welding tape laying device clamps a section of cut welding tape.

8. The stacking method according to any one of claims 5 to 7, characterized in that: Before controlling each of the laying mechanisms to independently move to lay the welding ribbon on the welding conveyor device, and before the cell transport device lays the cell and the tooling on the welding conveyor device, or both, the method further comprises: Controlling the first end of the conveyor belt of the welding conveyor device to extend in a stepwise manner in a direction away from the second end, wherein each time the conveyor belt steps in a predetermined length in the direction away from the second end, the conveyor belt turns upward by a preset length at the first end, so that an upper surface of the conveyor belt of the predetermined length forms an empty loading station; The battery cell transport device and the laying mechanism lay the battery cells and welding strips on the loading station, or lay the battery cells, tooling and welding strips on the loading station.

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