Battery string, photovoltaic module preparation method and preparation device

Abstract

The invention provides a preparation method and a preparation device for a battery string and a photovoltaic module, and the preparation method for the battery string comprises the following steps: preparing first battery piece assemblies and second battery piece assemblies through a battery piece assembly preparation mechanism, flatly laying the first battery piece assemblies and the second battery piece assemblies on a circulating conveying belt at intervals, the circulating conveying belt is provided with at least two input ends, and the battery piece assemblies are input into the circulating conveying belt through the input ends. The first battery piece assemblies and the second battery piece assemblies are alternately carried to the battery string stringing device from the circulating conveying belt, and the first battery piece assemblies and the second battery piece assemblies are sequentially arranged at intervals in the stringing length direction. And pasting the unpasted welding strips on the top surfaces of the battery pieces of the battery piece assemblies on the top surfaces of the battery pieces to form a battery string. The defect that in the prior art, in the process that a series welding machine is adopted to produce battery strings one by one, if a certain procedure goes wrong, shutdown maintenance is needed, and the production schedule is affected is overcome.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic cell manufacturing technology, specifically to a method and apparatus for manufacturing cell strings and photovoltaic modules. Background Technology

[0002] The common BC type photovoltaic module is manufactured by providing cell strings one by one through a string welding machine, and then arranging the cell strings by a layout machine to ensure that the spacing between the cell strings meets the production requirements of the photovoltaic module. Next, the busbars are welded to the cell strings and make electrical contact with the positive electrode on the surface of the cell strings. Finally, the cell string group with the busbars welded is sent to a laminator for lamination to obtain the photovoltaic module.

[0003] In the manufacturing process of photovoltaic modules, the common manufacturing method requires the production of cell strings one by one by a stringer and the transport of the strings. Then, the strings are arranged by a layout machine. The production efficiency is affected by the production speed of the stringer. Moreover, since the stringer involves multiple processes, if a problem occurs in one of the processes, the machine needs to be stopped for repair, which has a great impact on the production schedule and is not conducive to the production of photovoltaic modules on a production line. Summary of the Invention

[0004] The battery string and photovoltaic module preparation method and apparatus designed in this invention can overcome the shortcomings of the prior art, which uses a string welding machine to produce battery strings or photovoltaic modules one by one. The string welding machine involves multiple production processes. When a problem occurs in one of the processes, the machine needs to be stopped for maintenance, which has a great impact on the production progress and is not conducive to the mass production of battery strings or photovoltaic modules.

[0005] The purpose of this invention is to provide a method for preparing a battery string, comprising the following steps: A first battery cell assembly and a second battery cell assembly are prepared using a battery cell assembly preparation mechanism. The first battery cell assembly has a positive electrode solder strip attached to the top surface of the battery cell, and the second battery cell assembly has a negative electrode solder strip attached to the top surface of the battery cell. Each of the first and second battery cell assemblies is laid flat on a circulating conveyor belt with at least two input ends. The first and second battery cell assemblies are respectively input into the circulating conveyor belt through the input ends corresponding to their respective positions. The first and second battery cell assemblies are alternately transported from the circulating conveyor belt to the stringing platform of the battery stringing device, and the first and second battery cell assemblies are arranged sequentially at intervals along the stringing length direction of the battery string. The unattached solder strips on the top surface of each battery cell are attached to the top surface of each battery cell using a film strip prepared by the first coating mechanism of the battery stringing device to form a battery string.

[0006] In some embodiments, the first or second cell assembly being transported is identified before being moved from the circulating conveyor belt into the battery stringing device to ensure that the first and second cell assemblies are arranged alternately along the string length direction in the battery stringing device.

[0007] In some embodiments, during the fabrication of the first battery cell assembly and during the process of placing the first battery cell assembly on the circulating conveyor belt, each of the first battery cell assemblies is placed on a first placement platform, and the first placement platform is also provided with a welding strip clamp for clamping and positioning the welding strip protruding end of the first battery cell assembly. During the fabrication of the second battery cell assembly and during the process of placing the second battery cell assembly on the circulating conveyor belt, each of the second battery cell assemblies is placed on a second placement platform, and the second placement platform is also provided with a welding strip clamp for clamping and positioning the welding strip protruding end of the second battery cell assembly. When placing each of the first battery cell assembly and the second battery cell assembly on the circulating conveyor belt, a first conveying mechanism conveys the first placement platform and the second placement platform.

[0008] In some embodiments, a first identification code is provided on the top surface of the first placement platform, and a second identification code is provided on the second placement platform; and / or, a placement platform recycling and placement device is also provided in the area adjacent to the circulating conveyor belt and the battery cell assembly preparation mechanism, the placement platform recycling and placement device being used to recycle the first or second placement platform that has been removed from the first battery cell assembly, the second battery cell assembly and the welding strip press on the circulating conveyor belt and place it again in each of the battery cell assembly preparation mechanisms.

[0009] The present invention also provides a battery string fabrication apparatus, comprising: A cell assembly fabrication mechanism for fabricating a first cell assembly and a second cell assembly; A circulating conveyor belt is used to circulate and transport each of the first and second battery cell assemblies placed thereon in a predetermined direction, and has at least two input ends; A first conveying mechanism is used to place each of the first and second battery cell assemblies on the circulating conveyor belt; A battery stringing device for connecting the first and second battery cell assemblies, which are arranged alternately at intervals along the length of the battery string, into a battery string. The second transport mechanism is used to alternately place the first and second battery cell assemblies placed on the circulating conveyor belt into the battery stringing device.

[0010] In some embodiments, the cell assembly fabrication mechanism includes at least two sets of first cell assembly fabrication devices and at least two sets of second cell assembly fabrication devices, each of the first cell assembly fabrication devices being used to independently fabricate the first cell assembly, and each of the second cell assembly fabrication devices being used to independently fabricate the second cell assembly.

[0011] In some embodiments, at least two sets of the battery stringing device are configured, with each set of the battery stringing device arranged adjacent to the circulating conveyor belt; and / or, the circulating conveyor belt is annular, with each of the first battery cell assembly fabrication device, the second battery cell assembly fabrication device, and the battery stringing device arranged at intervals around the outer periphery of the circulating conveyor belt.

[0012] The present invention also provides a method for manufacturing photovoltaic modules, comprising the following steps: A battery string is prepared by the battery string preparation method according to any one of claims 1 to 6; A third transport mechanism is used to place each prepared battery string into the string arrangement mechanism in sequence, so that each battery string is parallel and spaced apart from each other. Photovoltaic modules are formed by connecting the positive electrode strips of each cell in two adjacent cell strings using busbars and then laminating them using a laminating mechanism.

[0013] In some embodiments, the solder strips extending beyond the length of each battery string are cut off before the battery strings are placed in the string arrangement mechanism.

[0014] The present invention also provides a photovoltaic module manufacturing apparatus, including the aforementioned battery string manufacturing apparatus, a string arrangement mechanism disposed adjacent to the battery string forming apparatus, and a lamination mechanism located on the output side of the string arrangement mechanism.

[0015] The present invention relates to a method and apparatus for preparing battery strings and photovoltaic modules. A battery cell module preparation device prepares multiple first and second battery cell modules. Each (quality-tested) prepared battery cell module is placed on a circulating conveyor belt from at least two input ends, awaiting sequential use by a battery stringing device. This significantly increases production line capacity. Furthermore, if a battery cell module preparation device malfunctions (e.g., fails to prepare battery cells normally), a working (or backup) battery cell module preparation device can be used to input the first and second battery cell modules from the input ends onto the circulating conveyor belt (or, if multiple battery cell module preparation devices exist, other working devices can maintain the input of the first and second battery cell modules onto the circulating conveyor belt). This reduces the impact on subsequent battery stringing. The entire production line can continue to prepare battery strings normally without shutdown, eliminating the shortcomings of existing technologies where a problem in a single step of the battery string production process using a string welding machine requires shutdown for maintenance, affecting production progress. Attached Figure Description

[0016] Figure 1 This is a diagram illustrating the preparation steps of the battery string preparation method in this embodiment of the invention; Figure 2 This is a schematic diagram (layout diagram) of a photovoltaic module manufacturing apparatus according to an embodiment of the present invention. In the figure, the red line indicates the positive electrode solder strip and the green line indicates the negative electrode solder strip. The figure only shows a first set of battery cell module manufacturing apparatus and a second set of battery cell module manufacturing apparatus. The circulating conveyor belt has two input ends.

[0017] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 yes Figure 2 A magnified view of a section at point B in the middle; Figure 5 This is a schematic diagram (layout diagram) of a photovoltaic module manufacturing apparatus according to another embodiment of the present invention. The diagram shows two sets of first cell module manufacturing apparatuses and two sets of second cell module manufacturing apparatuses, wherein the circulating conveyor belt has four input ends.

[0018] In the figure: 1. First cell module preparation device; 11. Cell module platform; 12. Tape making mechanism; 13. Second coating mechanism; 14. Cell feeding mechanism; 2. Second cell module preparation device; 3. Circulating conveyor belt; 4. Cell string forming device; 41. String forming platform; 42. First coating mechanism; 5. Placement table recycling and placement device; 6. Waste cell module recycling device; 7. String layout mechanism; 100. First cell module; 101. First placement table; 200. Second cell module; 201. Second placement table; 300. Welding strip press; 400. Cell string. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of regions and layers is exaggerated. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0020] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

[0021] The following examples describe the battery string, photovoltaic module fabrication method, and fabrication apparatus of the present invention. These examples are only a portion of the embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. All other embodiments obtained by those skilled in the art without inventive effort should be covered within the scope of protection of the present invention.

[0022] Please refer to the reference. Figures 1 to 5 According to an embodiment of the present invention, a method for preparing a battery string is provided, wherein the battery string is specifically a BC type battery string, comprising the following steps: A first battery cell assembly 100 and a second battery cell assembly 200 are fabricated using a battery cell assembly fabrication mechanism. The first battery cell assembly 100 has a positive electrode solder strip attached (specifically, for example, using a film strip corresponding to the position of the solder strip) to the top surface of the battery cell. Figure 2(As shown by the red lines in the diagram) and the positive electrode ribbon has a portion that extends beyond the top surface of the cell, i.e., an unattached portion (this portion of the ribbon is used to connect with the grid lines on the top surface of another cell to form a cell string), and the second cell assembly 200 has a negative electrode ribbon attached (specifically, for example, using a film strip corresponding to the position of the ribbon) to the top surface of the cell. Figure 2 (shown by the green lines in the image) and the negative electrode solder strip has a portion that extends beyond the top surface of the cell, i.e., an unattached portion (this portion of the solder strip is used to connect with the grid lines on the top surface of another cell to form a cell string). It is understood that each first cell assembly fabrication device 1 can simultaneously fabricate at least two first cell assemblies 100, and each second cell assembly fabrication device 2 can simultaneously fabricate at least two second cell assemblies 200. The first battery cell assembly 100 and the second battery cell assembly 200 are laid out flat at intervals on the circulating conveyor belt 3 (which can be driven to rotate along a preset direction to achieve circulation). It is understood that the aforementioned circulating conveyor belt 3 can simultaneously hold a sufficient number of first battery cell assemblies 100 and second battery cell assemblies 200 to meet the battery cell assembly requirements of the subsequent battery stringing devices 4. The circulating conveyor belt 3 has at least two input ends, and the first battery cell assembly 100 and the second battery cell assembly 200 are respectively input into the circulating conveyor belt 3 through the input ends corresponding to their respective positions. The first battery cell assembly 100 and the second battery cell assembly 200 are alternately transported from the circulating conveyor belt 3 to the stringing platform 41 of the battery stringing device 4, such that the first battery cell assembly 100 and the second battery cell assembly 200 are transported along the stringing length direction of the battery string 400 (within the direction of the stringing length). Figure 2 The directions shown are for reference, i.e., from left to right. The cells are arranged at intervals (the gap between two adjacent first cell modules 100 and second cell modules 200 can be positive or negative depending on the actual production needs). The unattached solder strips on the top surface of each cell module are attached to the top surface of each cell using the film strips prepared by the first coating mechanism 42 of the battery stringing device 4 to form a battery string 400.

[0023] In this technical solution, a battery cell assembly fabrication device is used to prepare multiple first and second battery cell assemblies. The prepared (quality-tested) battery cell assemblies are placed on a circulating conveyor belt from at least two input ends, awaiting sequential use by the battery stringing device. This greatly increases the production line capacity. Furthermore, if a battery cell assembly fabrication device malfunctions (e.g., a failure preventing normal battery cell assembly production), a working (or backup) battery cell assembly fabrication device can be used to input the first and second battery cell assemblies into the circulating conveyor belt (or, if there are multiple battery cell assembly fabrication devices, other working devices can keep the first and second battery cell assemblies input into the circulating conveyor belt). This reduces the impact on subsequent battery stringing. The entire production line can continue to produce battery strings normally without shutdown, eliminating the shortcomings of existing technologies where a problem in a single step of the stringing process requires shutdown for repair, affecting production progress.

[0024] In one specific embodiment, see Figure 5 As shown, the battery cell assembly fabrication mechanism includes at least two sets of first battery cell assembly fabrication devices 1 and at least two sets of second battery cell assembly fabrication devices 2. Each first battery cell assembly fabrication device 1 is used to independently fabricate the first battery cell assembly 100, and each second battery cell assembly fabrication device 2 is used to independently fabricate the second battery cell assembly 200.

[0025] When one of the aforementioned first cell module preparation devices 1 or second cell module preparation devices 2 malfunctions and cannot prepare cell modules, the preparation cycle of the same type of preparation device that is in normal operation can be increased to meet the production cycle of subsequent cell strings. For example, if one first cell module preparation device 1 malfunctions, the other first cell module preparation device 1 that is not malfunctioning can be controlled to increase its production cycle.

[0026] In some embodiments, before each of the first battery cell assembly 100 or the second battery cell assembly 200 is transported from the circulating conveyor belt 3 to the battery stringing device 4, the transported first battery cell assembly 100 or second battery cell assembly 200 is identified, for example by using an identification code (e.g., a QR code) configured on each battery cell assembly to identify whether the battery cell assembly is the first battery cell assembly 100 or the second battery cell assembly 200. This ensures that the first battery cell assembly 100 and the second battery cell assembly 200 are alternately arranged along the stringing length direction of the battery string 400 in the battery stringing device 4. It is understood that a corresponding identification device (not shown in the figure) can be provided at a position on the battery stringing device 4 adjacent to the circulating conveyor belt 3. Alternatively, a corresponding identification device can be provided on the transport mechanism (not shown in the figure) that transports the battery cell assembly to identify the specific type of the battery cell assembly before the transport mechanism transports the corresponding battery cell assembly.

[0027] In this technical solution, before the first battery cell assembly 100 or the second battery cell assembly 200 is transported from the circulating conveyor belt 3 to the battery stringing device 4, the battery cell assembly to be transported is first identified as either the first battery cell assembly 100 or the second battery cell assembly 200. This ensures that the first battery cell assembly 100 and the second battery cell assembly 200 can be arranged alternately in sequence within the battery stringing device 4, thereby ensuring accurate stringing of the battery and thus ensuring the quality of the battery stringing.

[0028] It is particularly important to emphasize that, since there are at least two of the first cell assembly preparation device 1 and the second cell assembly preparation device 2 in this invention, and the positions of each first cell assembly 100 and second cell assembly 200 prepared simultaneously will be random under the conveying action of the circulating conveyor belt 3, especially when one of the aforementioned preparation devices malfunctions and cannot prepare the corresponding cell assembly, the positions of each first cell assembly 100 and second cell assembly 200 on the circulating conveyor belt 3 will be even more random. Therefore, it is particularly important to identify the cell assembly type and then transport the corresponding cell assembly to the battery stringing device 4.

[0029] In one specific embodiment, the aforementioned circulating conveyor belt 3 is a stepping conveyor belt, which makes the placement of each battery cell assembly on the circulating conveyor belt 3 more regular. This facilitates the corresponding handling mechanism to reliably and stably transport and place each battery cell assembly into the battery stringing device 4.

[0030] In some embodiments, at least two sets of the battery stringing device 4 are configured, with each set of the battery stringing device 4 arranged adjacent to the circulating conveyor belt 3, as detailed in the following description. Figure 2As shown in the figure, the battery string forming device 4 is configured in two sets. This can further improve the efficiency of battery string forming, and also ensure that the entire preparation device can still prepare battery strings if one of the battery string forming devices 4 fails and cannot prepare battery strings.

[0031] In some embodiments, the circulating conveyor belt 3 is annular, and each of the first battery cell assembly fabrication device 1, the second battery cell assembly fabrication device 2, and the battery stringing device 4 is arranged at intervals around the outer periphery of the circulating conveyor belt 3, such as... Figure 2 As shown in the figure, in a specific embodiment, it is roughly square ring, which makes the overall structural layout of the preparation device more reasonable and the space utilization rate higher.

[0032] In this technical solution, a circular conveyor belt 3 is used, and the various cell module preparation devices and cell stringing devices are arranged at intervals along the outer periphery of the conveyor belt 3. The structural layout is particularly reasonable, and the number of corresponding cell module preparation devices and cell stringing devices can be reasonably configured according to actual production needs to meet the needs of flexible capacity expansion. At the same time, the circular circulation method can ensure a sufficient supply of cell modules.

[0033] See details Figure 2 As shown, the aforementioned first battery cell assembly fabrication apparatus 1 and second battery cell assembly fabrication apparatus 2 can have the same structure. For example, both include a battery cell feeding mechanism 14, a battery cell assembly platform 11, and a second coating mechanism 13 and a tape-making mechanism 12 located on opposite sides of the battery cell assembly platform 11. The battery cell feeding mechanism 14 is used to supply and place the battery cells on the battery cell assembly platform 11. The tape-making mechanism 12 is used to prepare positive electrode solder strips or negative electrode solder strips and place the corresponding solder strips sequentially on the top surface of each battery cell on the battery cell assembly platform 11. The second coating mechanism 13 is used to prepare corresponding film strips and place the prepared film strips on the solder strips of each battery cell on the battery cell assembly platform 11 to reliably bond the aforementioned positive electrode solder strips or negative electrode solder strips to the grid lines on the top surface of the battery cell. It should be noted that the aforementioned first battery cell assembly fabrication apparatus 1 and second battery cell assembly fabrication apparatus 2 are conventional structures in the field, and the present invention does not improve their specific structures, which will not be described in detail here.

[0034] In some embodiments, during the fabrication of the first battery cell assembly 100 and during the process of placing the first battery cell assembly 100 on the circulating conveyor belt 3, each of the first battery cell assemblies 100 is placed on a first placement platform 101, and the first placement platform 101 is also provided with a welding strip clamping fixture 300 for clamping and positioning the welding strip protruding end of the first battery cell assembly 100. During the fabrication of the second battery cell assembly 200 and during the process of placing the second battery cell assembly 200 on the circulating conveyor belt 3, each of the second battery cell assembly 200 is placed on a second placement platform 201, and the second placement platform 201 is also provided with a welding strip clamping fixture 300 for clamping and positioning the welding strip protruding end of the second battery cell assembly 200. When placing each of the first battery cell assembly 100 and the second battery cell assembly 200 on the circulating conveyor belt 3, a first conveying mechanism conveys (not shown in the figure) the first placement platform 101 and the second placement platform 201.

[0035] In this technical solution, the first battery cell assembly 100 and the second battery cell assembly 200 are respectively placed on the corresponding first placement platform 101 and second placement platform 201. When transporting each battery cell assembly, the first transport mechanism can transport the first placement platform 101 or the second placement platform 201 located below, which simplifies the structural design of the first transport mechanism. At the same time, each placement platform is also equipped with a welding strip clamp 300 that can clamp and position the protruding end of the welding strip, ensuring the positional stability of the welding strip during the transport of the battery cell assembly. More importantly, the first transport mechanism can be a transport robot that can form an adsorption or clamp on the placement platform. The first transport mechanism does not require the configuration of corresponding structures for the battery cell, welding strip and welding strip clamp 300, which greatly simplifies the design difficulty of the transport mechanism and reduces the design and manufacturing cost of the device.

[0036] The aforementioned welding strip clamp 300 can specifically adopt a top-down placement structure. That is, when it is necessary to clamp and position the protruding end of the welding strip, a corresponding handling mechanism is used to place the welding strip clamp 300 from the clamping platform (not shown in the figure) to the corresponding position (such as the aforementioned placement platform). During the placement of the welding strip clamp 300, the multiple sets of clamps on it can clamp each welding strip corresponding to the position. Of course, the welding strip can also be placed into the clamping gap of the multiple sets of clamps on the welding strip clamp 300 from top to bottom. In a preferred embodiment (not shown in the figure), the welding strip clamp 300 can be designed as an integral unit with the corresponding placement platform (i.e., the aforementioned first placement platform 101 or second placement platform 201) (integrated molding or assembled connection). In this way, the synchronous placement of each welding strip clamp 300 can be achieved during the process of picking up and placing the aforementioned first placement platform 101 or second placement platform 201, without the need to configure a corresponding handling mechanism for each welding strip clamp 300, further simplifying the structural design.

[0037] The aforementioned identification code can be set on each of the first battery cell assembly 100 or the second battery cell assembly 200. However, this method objectively requires the configuration of a corresponding coding mechanism in the manufacturing device, which increases the cost of the device. As a preferred embodiment, when using the aforementioned first placement platform 101 and second placement platform 201, a first identification code can be set on the top surface of the first placement platform 101 and a second identification code can be set on the second placement platform 201. The aforementioned first identification code and second identification code can be pre-coated on the corresponding placement platform, so that the first placement platform 101 and the second placement platform 201 are respectively bound to the first battery cell assembly 100 and the second battery cell assembly 200, which greatly simplifies the structural design and reduces the manufacturing cost of the device.

[0038] In some embodiments, a placement platform recovery and placement device 5 is also provided in the area adjacent to the circulating conveyor belt 3, the first battery cell assembly preparation device 1, and the second battery cell assembly preparation device 2. The placement platform recovery and placement device 5 is used to recover the first placement platform 101 or the second placement platform 201 that has been removed from the first battery cell assembly 100, the second battery cell assembly 200, and the welding strip press 300 on the circulating conveyor belt 3 and place them back into the respective first battery cell assembly preparation devices 1 and second battery cell assembly preparation devices 2. In a specific embodiment, the placement platform recovery and placement device 5 includes a placement conveyor (e.g., a conveyor belt) for carrying each placement platform and a handling mechanism (not shown in the figure) for transferring and moving the placement platforms between the placement conveyor and the circulating conveyor belt 3 and between the placement conveyor and the battery cell assembly platform 11. The handling mechanism can be an existing suction cup mechanical handling hand.

[0039] In some embodiments, a waste cell assembly recycling device 6 is also provided in the area where the first cell assembly preparation device 1 and the second cell assembly preparation device 2 are set up. This device is used to store the first cell assembly 100 and the second cell assembly 200 that are not up to standard prepared by the first cell assembly preparation device 1 and the second cell assembly preparation device 2. It is understood that a corresponding detection mechanism (not shown in the figure, such as an existing EL detection mechanism) is set at the output end of each cell assembly of the first cell assembly preparation device 1 and the second cell assembly preparation device 2 to perform online quality detection on each prepared cell assembly. When a quality defect such as microcrack is detected in the corresponding cell assembly, the cell assembly is transferred and stored in the waste cell assembly recycling device 6 by the corresponding waste cell handling mechanism to ensure the string quality of subsequent cell strings.

[0040] According to an embodiment of the present invention, a battery string fabrication apparatus is also provided, comprising: A cell module fabrication mechanism for fabricating a first cell module 100 and a second cell module 200; A circulating conveyor belt 3 is used to circulate and transport each of the first battery cell assembly 100 and the second battery cell assembly 200 placed thereon in a preset direction, and has at least two input ends; The first conveying mechanism (not shown in the figure) is used to place each of the first battery cell assembly 100 and the second battery cell assembly 200 on the circulating conveyor belt 3. When each battery cell assembly is placed on each of the first placement platform 101 and the second placement platform 201, the first conveying mechanism moves each of the first battery cell assembly 100 and the second battery cell assembly 200 by moving the corresponding first placement platform 101 or second placement platform 201. This greatly simplifies the design difficulty of the first conveying mechanism and reduces the manufacturing cost of the device. It is understood that when each battery cell assembly is respectively equipped with the aforementioned welding strip press 300, the welding strip press 300 is also placed on the corresponding placement platform. This can ensure the structural integrity of each battery cell assembly and the corresponding welding strip press 300 and ensure that the relative position of the welding strip press 300 and the battery cell assembly is stable and reliable. The battery stringing device 4 is used to string together the first battery cell assembly 100 and the second battery cell assembly 200, which are arranged alternately at intervals along the stringing length direction of the battery string 400, to form a battery string 400. The second transport mechanism (not shown in the figure) is used to alternately place the first battery cell assembly 100 and the second battery cell assembly 200 placed on the circulating conveyor belt 3 into the battery stringing device 4. Placement platform recycling and placement device 5, the placement platform recycling and placement device 5 is used to recycle the first placement platform 101 or the second placement platform 201 that has been removed from the first battery cell assembly 100, the second battery cell assembly 200 and the welding strip press 300 on the circulating conveyor belt 3 and place it again in each of the first battery cell assembly preparation device 1 and the second battery cell assembly preparation device 2. Waste cell module recycling device 6 is set in the area where the first cell module preparation device 1 and the second cell module preparation device 2 are set, and is used to store the first cell module 100 and the second cell module 200 that are not up to standard in quality prepared by the first cell module preparation device 1 and the second cell module preparation device 2.

[0041] It is understood that the battery string preparation device of the present invention breaks down the continuous process components in the traditional battery cell string welding machine into independent operating components and sets up multiple of them. The components cooperate and coordinate through the circulating conveyor belt 3, which enables each preparation device to operate simultaneously to prepare multiple first battery cell modules 100 and second battery cell modules 200. The prepared (quality-tested) battery cell modules are placed on the circulating conveyor belt 3 for sequential use by the battery string forming device 4. This can greatly improve the production line capacity, and at the same time, it can ensure that the subsequent battery string forming is not affected when a problem occurs in a battery cell module preparation device (such as a malfunction that prevents the normal preparation of battery cell modules). The entire production line can continue to prepare battery strings normally without stopping the machine, thus avoiding the shortcomings of the prior art in which a problem in a certain step of the process of producing battery strings one by one requires machine stoppage for maintenance and affects the production progress.

[0042] According to an embodiment of the present invention, a method for manufacturing a photovoltaic module is also provided, comprising the following steps: Battery strings are prepared using the battery string preparation method described above to obtain battery string 400; The prepared battery strings 400 are placed sequentially in the string arrangement mechanism 7 using a third transport mechanism, so that the battery strings 400 are parallel and spaced apart from each other. A busbar (not shown in the figure) is used to connect the positive electrode solder strips of each cell in two adjacent cell strings 400 in series. After being laminated by a laminating mechanism, a photovoltaic module is obtained. It is understood that the aforementioned busbar has a corresponding structure (e.g., current lead-out terminal) that is electrically connected to the photovoltaic module cell box.

[0043] In some embodiments, the solder strips extending beyond the length of each battery string 400 are cut off before each of the battery strings 400 is placed in the string arrangement mechanism 7.

[0044] According to an embodiment of the present invention, a photovoltaic module manufacturing apparatus is also provided, including the aforementioned battery string manufacturing apparatus, a string layout mechanism 7 disposed adjacent to the battery string forming device 4, and a lamination mechanism (not shown in the figure) located on the output side of the string layout mechanism 7, so as to laminate each film strip (i.e., adhesive film) on the top surface of the arranged battery cell assembly into a thin film covering the top surface of the battery cell.

[0045] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing a battery string, characterized in that, Includes the following steps: A first battery cell assembly (100) and a second battery cell assembly (200) are prepared using a battery cell assembly preparation mechanism. The first battery cell assembly (100) has a positive electrode solder strip attached to the top surface of the battery cell, and the second battery cell assembly (200) has a negative electrode solder strip attached to the top surface of the battery cell. Each of the first battery cell assembly (100) and the second battery cell assembly (200) is laid flat on a circulating conveyor belt (3) at intervals. The circulating conveyor belt (3) has at least two input ends. The first battery cell assembly (100) and the second battery cell assembly (200) are respectively input into the circulating conveyor belt (3) through the input ends corresponding to their respective positions. Each of the first battery cell assembly (100) and the second battery cell assembly (200) is alternately transported from the circulating conveyor belt (3) to the stringing platform (41) of the battery stringing device (4), such that each of the first battery cell assembly (100) and the second battery cell assembly (200) is arranged sequentially at intervals along the stringing length direction of the battery string (400), and the unattached solder strips on the top surface of each battery cell assembly are attached to the top surface of each battery cell using a film strip prepared by the first coating mechanism (42) of the battery stringing device (4) to form a battery string (400).

2. The battery string preparation method according to claim 1, characterized in that, Before each of the first cell assembly (100) or the second cell assembly (200) is transported from the circulating conveyor belt (3) to the battery stringing device (4), the transported first cell assembly (100) or second cell assembly (200) is identified to ensure that the first cell assembly (100) and the second cell assembly (200) are arranged alternately along the stringing length direction of the battery string (400) in the battery stringing device (4).

3. The battery string preparation method according to claim 2, characterized in that, During the fabrication process of the first battery cell assembly (100) and during the process of placing the first battery cell assembly (100) on the circulating conveyor belt (3), each of the first battery cell assemblies (100) is placed on a first placement table (101), and the first placement table (101) is also provided with a welding strip clamp (300) for clamping and positioning the welding strip protruding end of the first battery cell assembly (100). During the fabrication process of the second battery cell assembly (200) and during the process of placing the second battery cell assembly (200) on the circulating conveyor belt (3), each of the first battery cell assemblies (100) is placed on a first placement table (101), and the first placement table (101) is also provided with a welding strip clamp (300) for clamping and positioning the welding strip protruding end of the first battery cell assembly (100). During the process on the circulating conveyor belt (3), each of the second battery cell assemblies (200) is placed on the second placement platform (201), and the second placement platform (201) is also provided with a welding strip press (300) for clamping and positioning the welding strip protruding end of the second battery cell assembly (200). When each of the first battery cell assembly (100) and the second battery cell assembly (200) is placed on the circulating conveyor belt (3), the first transport mechanism transports the first placement platform (101) and the second placement platform (201).

4. The battery string preparation method according to claim 3, characterized in that, The top surface of the first placement platform (101) is provided with a first identification code, and the second placement platform (201) is provided with a second identification code; and / or, a placement platform recycling and placement device (5) is also provided in the area adjacent to the circulating conveyor belt (3) and the battery cell assembly preparation mechanism. The placement platform recycling and placement device (5) is used to recycle the first placement platform (101) or the second placement platform (102) that has been removed from the first battery cell assembly (100), the second battery cell assembly (200) and the welding strip press (300) on the circulating conveyor belt (3) and place them again in each of the battery cell assembly preparation mechanisms.

5. A battery string fabrication apparatus, characterized in that, include: A cell module manufacturing mechanism for manufacturing a first cell module (100) and a second cell module (200). A circulating conveyor belt (3) is used to circulate and transport each of the first battery cell assembly (100) and the second battery cell assembly (200) placed thereon in a predetermined direction, and has at least two input ends; A first conveying mechanism is used to place each of the first battery cell assembly (100) and the second battery cell assembly (200) on the circulating conveyor belt (3); A battery stringing device (4) is used to string together the first battery cell assembly (100) and the second battery cell assembly (200) arranged alternately at intervals along the stringing length direction of the battery string (400) to form a battery string (400). The second transport mechanism is used to alternately place the first battery cell assembly (100) and the second battery cell assembly (200) placed on the circulating conveyor belt (3) into the battery stringing device (4).

6. The battery string fabrication apparatus according to claim 5, characterized in that, The battery cell assembly fabrication mechanism includes at least two sets of first battery cell assembly fabrication devices (1) and at least two sets of second battery cell assembly fabrication devices (2). Each first battery cell assembly fabrication device (1) is used to independently fabricate the first battery cell assembly (100), and each second battery cell assembly fabrication device (2) is used to independently fabricate the second battery cell assembly (200).

7. The battery string fabrication apparatus according to claim 6, characterized in that, The battery stringing device (4) is configured in at least two sets, and each set of the battery stringing device (4) is arranged adjacent to the circulating conveyor belt (3); and / or, the circulating conveyor belt (3) is annular, and each of the first battery cell assembly preparation device (1), the second battery cell assembly preparation device (2) and the battery stringing device (4) is arranged at intervals around the outer periphery of the circulating conveyor belt (3).

8. A method for manufacturing a photovoltaic module, characterized in that, Includes the following steps: A battery string is prepared by means of any one of claims 1 to 4 to obtain a battery string (400). The prepared battery strings (400) are placed sequentially in the string arrangement mechanism (7) using a third transport mechanism, and the battery strings (400) are parallel and spaced apart from each other. A photovoltaic module is obtained by connecting the positive electrode strips of each cell in two adjacent battery strings (400) using a busbar and then laminating them through a lamination mechanism.

9. The photovoltaic module manufacturing method according to claim 8, characterized in that, Before each of the battery strings (400) is placed in the string arrangement mechanism (7), the solder strips extending beyond the length end of each battery string (400) are cut off.

10. A photovoltaic module manufacturing apparatus, characterized in that, It includes the battery string preparation apparatus as described in claim 7, a string arrangement mechanism (7) disposed adjacent to the battery string forming device (4), and a lamination mechanism located on the output side of the string arrangement mechanism (7).

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