A string combining device and a battery string preparation method

Abstract

The application discloses a kind of stringing device and battery string preparation method, it is related to battery string production technical field, the method includes multiple sheet assembly, sheet assembly includes the sheet insertion table for carrying battery sheet, and the film receiving table for receiving adhesive film group is arranged in the side of sheet insertion table, sheet assembly is also configured to carry welding strip, and welding strip includes the first long section with the surface of battery sheet superposed and the second long section extended to the film receiving table of the side of sheet insertion table and the surface of adhesive film group superposed;The sheet insertion table in multiple sheet assembly is all set towards the same side, and the sheet insertion table in each sheet assembly can be inserted into the film receiving table in adjacent one sheet assembly, so that the adhesive film group on adjacent film receiving table is inserted into the above or below of the battery sheet carried by current sheet insertion table, to make the adhesive film group on film receiving table and second long section and the surface of battery sheet in adjacent sheet assembly correspondingly superposed string connection, the precise docking between each component is realized by the cooperative action of sheet insertion table and film receiving table, effectively improve the efficiency and accuracy of lamination.

Description

Technical Field

[0001] This invention relates to the field of battery string production technology, and in particular to a string-connecting device and a method for preparing battery strings. Background Technology

[0002] With the development of the photovoltaic industry, in order to reduce the loss of silver paste on the grid lines of solar cells, a technology that uses an adhesive film to connect the solder ribbon to the solar cell without a main grid has been widely used. This adhesive film is precisely attached to the grid line area on the surface of the solar cell to achieve the positioning and fixation of the solder ribbon.

[0003] In existing technical solutions, the bonding of adhesive film and welding ribbon is mostly achieved by sequentially aligning and bonding a single cell, a single set of welding ribbon, and a single set of adhesive film to complete the interconnection of the battery string. This process is inefficient and it is difficult to ensure the positioning consistency of the welding ribbon group in continuous operation. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a battery string assembly device and a method for preparing battery strings.

[0005] In a first aspect, this application provides a string assembly device, comprising: a plurality of stacking assemblies, the stacking assembly including an insertion platform for carrying solar cells, and a film receiving platform disposed on one side of the insertion platform for receiving adhesive film assemblies, the stacking assembly further being configured to carry a solder strip, the solder strip including a first long section overlapping the surface of the solar cell and a second long section extending to one side of the insertion platform overlapping the surface of the adhesive film assemblies;

[0006] The insertion platforms in the multiple lamination assemblies are all arranged facing the same side. The insertion platform in each lamination assembly can extend into the film-bearing platform in an adjacent lamination assembly, so that the adhesive film group on the adjacent film-bearing platform is inserted above or below the battery cell carried by the current insertion platform, so that the adhesive film group and the second long section on the film-bearing platform are stacked and connected in series with the surface of the battery cell in the adjacent lamination assembly.

[0007] Furthermore, when the adhesive film group placed on the film support platform in the lamination assembly is configured as the first adhesive film group, the insertion platform is also used to receive the second adhesive film group for bonding the first long segment to the surface of the battery cell.

[0008] Furthermore, it also includes a support platform, and the insert platform is provided with a gap for inserting the support platform. The support platform can be raised and lowered relative to the gap for inserting or can be translated relative to the gap of the insert platform to move closer to or away from it.

[0009] Furthermore, the support platform is provided with a heating structure, which is used to heat, cure and bond the battery cell on the support platform and the second adhesive film group covering the first long section on the battery cell.

[0010] Furthermore, a limiting structure is provided on one side of the film-bearing platform, which is used to position one end of the second long segment.

[0011] Furthermore, it also includes a heat-bonding device for bonding the second long section on the film support platform to the adhesive film assembly.

[0012] Furthermore, a receiving gap is provided between the film receiving platform and the limiting structure, and the first adhesive film group includes an adhesive film connecting part laid on the film receiving platform and an adhesive film folded edge part extending from the edge of the film receiving platform and bending towards the receiving gap.

[0013] Furthermore, the film-bearing platform is provided with an adsorption hole for positioning the adhesive film assembly and a groove for holding the second long section.

[0014] Furthermore, the adhesive film assembly includes a plurality of first adhesive film units arranged continuously along the length of the film receiving platform and matched one-to-one with the number of solder strips in the second long section. Adjacent first adhesive film units have adhesive-free areas. The film receiving platform is provided with one or more partition grooves corresponding to the adhesive-free areas. The partition grooves are used to accommodate the support portion of the insert stage in the adjacent lamination assembly.

[0015] Furthermore, the insertion stage also includes adsorption sections distributed on both sides of the support section, the adsorption sections being used to adsorb and fix at least the two side edges of the battery cell.

[0016] Secondly, this application also proposes a method for preparing battery strings, including any of the above-mentioned stringing devices, the steps of which are as follows:

[0017] In each of the lamination assemblies, an adhesive film assembly is placed on the film-bearing stage, and a battery cell is placed on the insertion stage;

[0018] At the same time, multiple sets of welding strips are transported and the first long section of each set of welding strips is stacked with the upper surface of the cell on the corresponding insertion stage, and the second long section extends to the film support stage and is stacked with the adhesive film set.

[0019] Insert the cell insertion platform of one of the adjacent laminated modules into the film-supporting platform of the other laminated module, so that the cells on the cell insertion platform of any one of the adjacent laminated modules are stacked with the second long section on the film-supporting platform of the other laminated module to form a series battery string.

[0020] Furthermore, the adhesive film group placed on the film support platform in the lamination assembly is configured as the first adhesive film group;

[0021] Before inserting the insert stage of one of the adjacent lamination assemblies into the film-bearing stage of the other lamination assembly, the method further includes: transporting multiple sets of second adhesive film assemblies and placing them on each first long segment, and bonding and fixing them to the surface of the cell.

[0022] Furthermore, the stacking of a cell on the insertion stage of one of the adjacent lamination assemblies with a second long segment on the film-bearing stage of the other lamination assembly includes: the second long segment and the first long segment on the same surface of the cell being arranged alternately at intervals; or the second long segment being inserted into the other surface of the cell opposite to the first long segment.

[0023] The beneficial effects of this invention on battery strings are as follows: multiple battery cells and solder ribbons are pre-positioned and stacked by multiple stacking components, and the precise docking between each component is achieved through the coordinated action of the insertion stage and the film support stage, which effectively improves the stacking efficiency and accuracy. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the assemblies in the stringing device proposed in this invention;

[0026] Figure 2 This is a schematic diagram of the structure of the support platform and the assembly in this invention.

[0027] Figure 3 This is a schematic diagram of the structure of multiple composite components strung together in this invention;

[0028] Figure 4 This is a schematic diagram of the steps in the first battery string preparation method of the present invention;

[0029] Figure 5 This is a schematic diagram of the steps in the second battery string preparation method of the present invention.

[0030] The attached figures are labeled as follows:

[0031] 1. Battery cell; 2. First encapsulant film assembly; 3. Welding strip; 31. First long section; 32. Second long section; 301. Gap; 4. Second encapsulant film assembly; 10. Insertion stage; 11. Support part; 12. Adsorption part; 20. Film receiving stage; 21. Separating groove; 22. Adsorption hole; 23. Groove; 201. Encapsulant film connection part; 202. Encapsulant film folding part; 30. Support platform; 40. Limiting structure. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of the above embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0033] It should be understood that the following embodiments do not limit the execution order of the steps in the method protected by this application. The steps of the method of this application can be executed in any possible order and in a cyclic manner without contradicting each other.

[0034] In the description of this application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "front", "back", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] In related technologies, an insulating film is used to fix the solder ribbon 3 onto the solar cell 1, which eliminates the need for high-temperature welding and effectively avoids thermal stress damage to the solar cell 1. Combined with low-energy welding technology, the pulse current parameters and welding pressure are further optimized to achieve a reliable connection between the solder ribbon 3 and the electrode.

[0039] Based on the aforementioned low-temperature interconnected battery string technology using insulating films, this application proposes a string-connecting device suitable for the aforementioned battery strings, comprising: multiple connecting assemblies, such as... Figure 1 As shown, each lamination assembly includes an insertion platform 10 for carrying the battery cell 1, and a film receiving platform 20 disposed on one side of the insertion platform 10 for receiving the adhesive film assembly. The insertion platform 10 is also configured to carry a solder ribbon 3 placed on the surface of the battery cell 1. The solder ribbon 3 includes a first long section 31 placed on the surface of the battery cell 1 and a second long section 32 extending to the surface of the adhesive film assembly on the film receiving platform 20 on one side of the insertion platform 10. The insertion platforms 10 in several lamination assemblies are all arranged facing the same side, and the insertion platforms 10 in the lamination assembly extend... The second long section 32 is placed above or below the film-supporting platform 20 in an adjacent lamination assembly, and moves the battery cell 1 and welding ribbon 3 assembly on it toward the film-supporting platform 20, so that the second long section 32 is stacked on the surface of the battery cell 1 of the adjacent insertion platform 10, so that the adhesive film on the film-supporting platform 20 is stacked with the surface of the battery cell 1 in the adjacent lamination assembly. Multiple stringing devices are synchronously linked and controlled to realize the continuous synthesis of battery strings, ensuring the positioning accuracy and stacking stability between each lamination assembly, thereby improving the overall stringing efficiency and yield.

[0040] When some battery strings are used, the adhesive film group placed on the film support platform 20 in the lamination assembly is configured as the first adhesive film group 2, and the insert platform 10 is also used to receive the second adhesive film group 4 for bonding the first long segment 31 to the surface of the battery cell 1. The second adhesive film group 4 placed on the first long segment 31 covers and bonds the first long segment 31 of the solder ribbon 3 to the surface of the battery cell 1.

[0041] Based on this, refer to Figure 2 As shown, the string assembly device includes a support platform 30, and a gap 301 for inserting the support platform 30 is provided on the inserting platform 10. The support platform 30 can be movably inserted into the gap 301 of the inserting platform 10, or moved out of the gap 301 of the inserting platform 10. Moving out of the gap 301 of the inserting platform 10 includes: moving to the bottom of the inserting platform 10 or avoiding it to the side. Specifically, when the support platform 30 is located in the gap 301 of the inserting platform 10, it can provide stable vertical support for the inserting platform 10, and together with the inserting platform 10, it can support the battery cell 1 and the solder ribbon 3 assembly, ensuring the flatness of the structure and the balance of the load during the assembly process.

[0042] When the support platform 30 is located within the gap 301 of the insertion platform 10, its top is flush with the top of the insertion platform 10, and it presses the top of the second adhesive film group 4 to tightly adhere the second adhesive film group 4 to the surface of the solder ribbon 3 and the battery cell 1, ensuring that there are no air bubbles or misalignments between the adhesive film and the solder ribbon 3, thereby improving the bonding reliability.

[0043] When the support platform 30 descends to the bottom of the insertion platform 10 or moves to the side, the insertion platform 10 moves towards the film support platform 20 in the adjacent lamination assembly under the drive of the drive component. The insertion platform 10 is inserted into the film support platform 20 in the adjacent lamination assembly, which drives the battery cell 1 and the welding ribbon 3 assembly on this lamination assembly to move forward synchronously, so that the second long section 32 welding ribbon 3 is accurately connected to the preset connection area of ​​the adjacent battery cell 1. The preset connection area is the bottom area of ​​the adjacent battery cell 1, thereby realizing the precise electrical connection between the welding ribbon 3 and the adjacent battery cell 1.

[0044] For example, when there are two lamination assemblies, each lamination assembly is connected to each of the insertion platforms 10, which are arranged facing the same side and spaced apart in sequence. A battery cell 1 is laid on the insertion platform 10 of each lamination assembly. An adhesive film group, configured as the first adhesive film group 2, is placed on the film support platform 20 in the lamination assembly. Subsequently, a set of solder ribbons 3 are laid on the battery cell 1 and the first adhesive film group 2 on each lamination assembly. The first long section 31 of the solder ribbon 3 covers the surface of the battery cell 1, and the second long section 32 of the solder ribbon 3 extends to the area of ​​the first adhesive film group 2 on the film support platform 20. At this time, the support platform 30 rises and is inserted into the gap 301 between each insertion platform 10 to provide stable support. The second adhesive film group 4 is precisely attached to the first long section 31 of each solder ribbon 3 and the surface of the battery cell 1. At the same time, uniform pressure is applied to ensure that the adhesive film is completely adhered without bubbles or wrinkles. Subsequently, the support platform 30 descends and moves out of the gap 301 of the insertion platform 10. The insertion platform 10 in each lamination assembly sequentially moves the battery cell 1 and the welding ribbon 3 assembly towards the adjacent film support platform 20, so that the insertion platform 10 on the next lamination assembly is inserted into the film support platform 20 of the previous lamination assembly, driving the battery cell 1 and the welding ribbon 3 assembly to move forward synchronously, so that the second long section 32 of the welding ribbon 3 of the previous one is accurately connected to the preset connection area at the bottom of the battery cell 1 of the next one, realizing the series-parallel electrical connection.

[0045] In another embodiment, see Figure 3As shown, when there are two lamination assemblies, each lamination assembly is connected to a set of inserting platforms 10, each facing the same side and arranged sequentially at intervals. A battery cell 1 is placed on the inserting platform 10 of each lamination assembly. An adhesive film set, configured as the first adhesive film set 2, is placed on the film-supporting platform 20 of the lamination assembly. A second adhesive film set 4 is precisely attached to the first long section 31 of each solder ribbon 3 and the surface of the battery cell 1. Then, the support platform 30 descends and moves out of the gap 301 between the inserting platforms 10. The inserting platforms 10 in each lamination assembly sequentially place... The battery cell 1 and the ribbon 3 assembly are moved toward the adjacent film support platform 20, so that the insert platform 10 on one of the lamination assemblies is inserted into the film support platform 20 of another lamination assembly, driving the battery cell 1 and the ribbon 3 assembly to move forward synchronously, so that the second long segment 32 and the first adhesive film group 2 on one of the lamination assemblies are accurately connected to the pre-set connection area of ​​the first long segment 31 on the next battery cell 1, so that the second long segment 32 and the first long segment 31 are arranged alternately on the same surface of the battery cell 1, realizing series and parallel electrical connection.

[0046] Based on the above steps, the stacking order of the film-bearing platform 20 and the insert platform 10 in two adjacent composite assemblies can be interchanged, that is, the film-bearing platform 20 in one composite assembly can be inserted above or below the insert platform 10 in another composite assembly, and vice versa. This embodiment does not limit the order of merging and connecting.

[0047] It should be noted that, in order to improve the efficiency of battery string assembly, the number of composite modules can be flexibly configured according to actual production needs. Multiple composite modules working together can achieve continuous and automated string assembly operations, significantly improving the assembly speed and accuracy of battery strings.

[0048] In some embodiments, during the transfer process, the second long section 32 of each welding strip 3 adapts to the height difference between the battery cells 1 under the elastic compensation of the Z-shaped bending section, effectively alleviating the stress concentration caused by the thickness tolerance or assembly error of the battery cell 1, avoiding the generation of hidden cracks or micro-cracks at the edge of the battery cell 1 due to excessive stress, and ensuring the stability and reliability of the electrical connection.

[0049] To further improve the bonding accuracy and efficiency between the conductive area of ​​the battery cell 1 and the solder ribbon 3, a heating structure is provided on the support platform 30. As the support platform 30 rises and supports the battery cell 1, the heating structure heats and activates the second adhesive film group 4 when the film strip placement mechanism attaches it to the surface of the solder ribbon 3 and the battery cell 1. This allows the second adhesive film group 4 to adhere rapidly and bond with the first long segment 31 on the battery cell 1, enhancing the bonding strength. The heating temperature is controlled between 80℃ and 120℃ to avoid overheating and damaging the active layer of the battery cell 1. Through the synergistic effect of thermo-pressing by the film strip placement mechanism, interface bubbles are further eliminated, ensuring full adhesion between the adhesive film, the solder ribbon 3, and the battery cell 1. Simultaneously, the battery cell 1 can be preheated by the heating element preset within the support platform 30, improving the bonding efficiency when the second adhesive film group 4 is placed and bonded to the battery cell 1.

[0050] Specifically, a receiving gap 301 is provided between the film receiving platform 20 and the limiting structure 40. The adhesive film assembly includes an adhesive film connecting part 201 laid and positioned on the surface of the film receiving platform 20 and an adhesive film folded edge part 202 extending out of the edge of the film receiving platform 20 and bent downward. The adhesive film connecting part 201 is attached to the surface of the film receiving platform 20. One end of the second long section 32 of the welding ribbon 3 placed on the first adhesive film and the adhesive film folded edge part 202 both extend out of the edge of the film receiving platform 20. When the adhesive film folded edge part 202 bends downward, one end of the second long section 32 of the welding ribbon 3 also bends downward to form a pre-bent structure, which reserves a stacking space for the subsequent stacking and electrical connection of the fixed limiting structure 40 at the end of the welding ribbon 3 between the battery cells 1. After the subsequent lamination process, the bent adhesive film folded edge part 202 is smoothed and completely attached to the preset bonding area at the bottom of the adjacent battery cell 1 to achieve continuous series connection. After the smoothed adhesive film folded edge 202 is heated and pressed together with the bottom of the adjacent battery cell 1, it is firmly bonded to the side of the battery cell 1, forming the end of the second long section 32 of the welding strip 3 to cover and fix it, preventing displacement or lifting.

[0051] In order to position and limit the adhesive film placed on the film receiving platform 20 and prevent it from shifting or wrinkling during the transfer process, the film receiving platform 20 is provided with an adsorption hole 22 that coincides with the position of the adhesive film laying and a groove 23 for receiving the second long section 32. The adsorption hole 22 is connected to a negative pressure device and uses airflow to adsorb and fix the adhesive film connecting part 201, ensuring that it is flat and adhered to the surface of the film receiving platform 20. The groove 23 is arranged along the extension direction of the welding strip 3 and its depth is adapted to the thickness of the second long section 32, limiting the lateral displacement and vertical jump of the welding strip 3 during the transfer process.

[0052] In another embodiment, the first adhesive film group 2 includes a plurality of first adhesive film units arranged continuously along the length of the film receiving platform 20, each matching the number of solder ribbons 3 in the second long section 32. Adhesive-free areas are provided between adjacent first adhesive film units. The film receiving platform 20 has one or more partition grooves 21 corresponding to the adhesive-free areas. The partition grooves 21 are used to accommodate the support portion 11 of the insertion platform 10 in adjacent lamination assemblies, preventing interference between the insertion platform 10 and the adhesive film during insertion and ensuring smooth lamination. The width of the partition groove 21 matches the adhesive-free areas. During insertion, the support portion 11 of the insertion platform 10 slides smoothly into the partition groove 21, allowing the battery cell 1 on the support portion 11 to slide to the upper part of the second long section 32 and the first adhesive film group 2 before descending to complete the precise alignment of the battery cell 1 and solder ribbon 3.

[0053] In some embodiments, the insertion stage 10 further includes adsorption sections 12 distributed on both sides of the support section 11. The adsorption sections 12 are used to adsorb and fix at least the two side edges of the battery cell 1. The adsorption sections 12 stabilize the edges of the battery cell 1 through negative pressure adsorption, preventing it from shifting or vibrating during movement. The adsorption sections 12 of the insertion stage 10 adsorb the bottom of the battery cell 1 and move synchronously with the insertion stage 10 to above the adjacent film support stage 20, avoiding the coverage area of ​​the first adhesive film group 2 on the film support stage 20. It then falls down and lands above the first adhesive film group 2 and the solder ribbon 3, so that the bottom of the battery cell 1 is electrically connected to the second long section 32 and the first adhesive film unit is precisely attached. During the descent, the support section 11 of the insertion stage 10 supports the surface of the battery cell 1 in the middle of the adsorption section 12 and accurately guides it into the film support stage 20 along the partition groove 21, ensuring the alignment accuracy of the battery cell 1 and the second long section 32 of the solder ribbon 3.

[0054] On the other hand, this application also proposes a method for preparing a battery string, including any of the above-mentioned stringing devices, the steps of which include:

[0055] An adhesive film assembly is placed on the film support platform 20 of each lamination assembly, and a cell 1 is placed on the insertion platform 10. At the same time, multiple sets of solder ribbons 3 are transported and the first long section 31 of each set of solder ribbons 3 is stacked with the surface of the cell 1 on the corresponding insertion platform 10, and the second long section 32 extends to the film support platform 20 and is stacked with the adhesive film assembly. Then, the insertion platform 10 of one of the adjacent lamination assemblies is inserted into the film support platform 20 of the other lamination assembly, so that the cell 1 on the insertion platform 10 of any one of the adjacent lamination assemblies is stacked with the second long section 32 and the adhesive film assembly on the film support platform 20 of the other lamination assembly to form a series-connected battery string.

[0056] The method further includes: during the insertion stage 10 inserting the film support stage 20, the solder ribbon 3 segments on both the insertion stage 10 and the film support stage 20 are bonded and positioned by the adhesive film group to ensure that the solder ribbon 3 and the battery cell 1 maintain zero displacement adhesion during dynamic stacking; then, a preset temperature and pressure are applied to activate the adhesive film adhesion, and the first adhesive film group 2 and the second adhesive film group 4 are cured simultaneously to achieve conformal encapsulation of the interfaces of the battery cell 1, the solder ribbon 3 and the adhesive film; or, the first adhesive film group 2 and the second adhesive film group 4 are heated stepwise to pre-bond the second adhesive film group 4 and the first long segment 31 to the surface of the battery cell 1, and the first adhesive film group 2 is precisely bonded to the surface of the battery cell 1 on the second long segment 32 and another laminated assembly.

[0057] The above-mentioned battery string preparation method also includes placing an adhesive film group configured as a first adhesive film group 2 on the film support platform 20 in the lamination assembly; then, before inserting the insertion platform 10 of one of the adjacent lamination assemblies into the film support platform 20 of the other, it further includes: transporting multiple sets of second adhesive film groups 4 and placing them on the surface of the battery cell 1 of each insertion platform 10, so that the second adhesive film group 4 covers the contact area between the first long segment 31 and the battery cell 1 and is bonded and fixed, ensuring that the first long segment 31 and the surface of the battery cell 1 do not slip relative to each other during the subsequent lamination process.

[0058] The above method for preparing battery strings is applicable to two different types of battery strings, see [link to relevant documentation]. Figure 4 , Figure 5 As shown, one type of battery string is suitable for battery strings with a conventional single-sided solder strip 3 structure, while the other type is suitable for double-sided heterogeneous stacked battery strings. When preparing a battery string with a conventional single-sided solder strip 3 structure, the stacking of the battery cell 1 on the insertion platform 10 of any one of the adjacent stacked components with the second long segment 32 and adhesive film group on the film support platform 20 of the other stacked component includes: the second long segment 32 and the first adhesive film group 2 are arranged alternately with the first long segment 31 on the same surface of the battery cell 1 on the film support platform 20 of the other stacked component, thereby forming an alternating single-sided conductive structure. When preparing a double-sided heterogeneous stacked battery string, the stacking of the insertion platform 10 and the film support platform 20 requires that the second long segment 32 and the first adhesive film group 2 be inserted into the other surface of the battery cell 1 away from the first long segment 31. The first long segment 31 and the second long segment 32 respectively contact the front and back of the battery cell 1, so that the upper and lower surfaces of the stacked battery are in precise contact, realizing double-sided conductive series connection.

[0059] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A string merging device, characterized in that, include: Multiple lamination assemblies, each lamination assembly including an insertion platform for carrying solar cells and a film receiving platform disposed on one side of the insertion platform for receiving adhesive film assemblies, the lamination assembly also being configured to carry a solder strip, the solder strip including a first long section overlapping the surface of the solar cell and a second long section extending to one side of the insertion platform overlapping the surface of the adhesive film assemblies; The insertion platforms in the multiple lamination assemblies are all arranged facing the same side. The insertion platform in each lamination assembly can extend into the film-bearing platform in an adjacent lamination assembly, so that the adhesive film group on the adjacent film-bearing platform is inserted above or below the battery cell carried by the current insertion platform, so that the adhesive film group and the second long section on the film-bearing platform are stacked and connected in series with the surface of the battery cell in the adjacent lamination assembly.

2. The string merging device according to claim 1, characterized in that, When the adhesive film group placed on the film receiving platform in the lamination assembly is configured as the first adhesive film group, the inserting platform is also used to receive the second adhesive film group laid on the top of the first long section.

3. The string merging device according to claim 1, characterized in that, It also includes a support platform, and the insert platform is provided with a gap for inserting the support platform. The support platform can be raised and lowered relative to the gap for inserting or can be translated relative to the gap of the insert platform to move closer to or further away from it.

4. The string merging device according to claim 3, characterized in that, The support platform is equipped with a heating structure, which is used to heat, cure and bond the battery cells on the support platform and the second adhesive film group covering the first long section of the battery cells.

5. The string merging device according to claim 1, characterized in that, A limiting structure is also provided on one side of the film-bearing platform, which is used to position one end of the second long segment.

6. The string merging device according to claim 1, characterized in that, It also includes a heat-bonding device for bonding the second long section on the film support platform to the film assembly.

7. The string merging device according to claim 5, characterized in that, A receiving gap is also provided between the film receiving platform and the limiting structure. The adhesive film assembly includes an adhesive film connecting part laid on the film receiving platform and an adhesive film folded edge part extending from the edge of the film receiving platform and bending towards the receiving gap.

8. The string merging device according to claim 1, characterized in that, The film-bearing platform is provided with an adsorption hole for positioning the adhesive film assembly and a groove for holding the second long section.

9. The string merging device according to claim 1, characterized in that, The adhesive film assembly includes a plurality of first adhesive film units arranged continuously along the length of the film receiving platform and matched one-to-one with the number of solder strips in the second long section. Adhesive film-free areas are provided between adjacent first adhesive film units. One or more partition grooves corresponding to the adhesive film-free areas are provided on the film receiving platform. The partition grooves are used to accommodate the support portion of the insert stage in the adjacent lamination assembly.

10. The string merging device according to claim 9, characterized in that, The insertion stage also includes adsorption sections distributed on both sides of the support section, which are used to adsorb and fix at least the two side edges of the battery cell.

11. A method for preparing a battery string, characterized in that, The method includes providing a serial merging device as described in any one of claims 1-10, comprising the following steps: In each of the lamination assemblies, an adhesive film assembly is placed on the film-bearing stage, and a battery cell is placed on the insertion stage; At the same time, multiple sets of welding strips are transported and the first long section of each set of welding strips is stacked with the upper surface of the cell on the corresponding insertion stage, and the second long section extends to the film support stage and is stacked with the adhesive film set. Insert the cell insertion platform of one of the adjacent laminated modules into the film receiving platform of the other laminated module, so that the cells on the cell insertion platform of any one of the adjacent laminated modules are stacked with the second long section and the film assembly on the film receiving platform of the other laminated module to form a series-connected battery string.

12. The battery string preparation method according to claim 11, characterized in that, The adhesive film group placed on the film support platform in the lamination assembly is configured as the first adhesive film group; Before inserting the insert stage of one of the adjacent lamination assemblies into the film-bearing stage of the other lamination assembly, the method further includes: transporting multiple sets of second adhesive film assemblies and placing them on each first long segment, and bonding and fixing them to the surface of the cell.

13. The method for preparing a battery string according to claim 12, characterized in that, The stacking of a cell on the insertion stage of one of the adjacent lamination assemblies with a second long segment and a film group on the film-bearing stage of the other lamination assembly includes: the second long segment and the first film group being arranged alternately with the first long segment on the same surface of the cell; or the second long segment and the first film group being inserted into the other surface of the cell away from the first long segment.

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