Busbar assembly method, battery string, battery string layout components and photovoltaic modules

Abstract

This invention relates to the field of solar energy technology, specifically disclosing a busbar assembly method, a battery string, a battery string layout component, and a photovoltaic module. The assembly method of the busbar and battery string includes the following steps: arranging several battery strings at intervals along a first direction; wherein each battery string includes several battery cells arranged along a second direction, several positive electrode solder strips and several negative electrode solder strips arranged alternately along the first direction; several positive electrode patches are correspondingly attached to the positive electrode solder strips, with a positive electrode adhesive notch at the connection point with the busbar; several positive electrode adhesive notches are arranged at intervals along the first direction; several negative electrode patches are correspondingly attached to the negative electrode solder strips; extending the busbar along the first direction and placing it on the battery cells, the busbar being electrically connected to the positive electrode solder strips through the positive electrode adhesive notch; and fixing adhesive patches are attached to the busbar and battery cells. This method solves the problem of microcracks in the battery cells and improves the yield rate.

Description

Technical Field

[0001] This invention relates to the field of solar energy technology, and in particular to a busbar assembly method, a battery string, a battery string arrangement component, and a photovoltaic module. Background Technology

[0002] The common back-contact (BC) photovoltaic module is manufactured by supplying cell strings one by one using a stringer, then arranging the cell strings using a layout machine to ensure that the spacing between the cell strings meets the production requirements of the photovoltaic module. Next, busbars are welded to the cell cells on the cell strings. After welding, the positive electrode patch below the busbar melts, making electrical contact between the busbar and the positive electrode on the surface of the cell. Finally, the cell string assembly with the busbars welded is sent to a laminator for lamination to obtain the photovoltaic module.

[0003] During the welding process, the busbar or the battery cell may deform. When the busbar deforms, it may indirectly cause the battery cell to develop microcracks. When the battery cell deforms, it may directly cause the battery cell to develop microcracks, thereby reducing the yield.

[0004] Therefore, it is urgent to study a busbar assembly method, a battery string, a battery string layout component, and a photovoltaic module to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a busbar assembly method, a battery string, a battery string layout component, and a photovoltaic module to solve the problem of microcracks in the battery cells affecting the yield in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for assembling a busbar and a battery string includes the following steps:

[0008] Several battery strings are arranged at intervals along the first direction;

[0009] Each battery string includes several battery cells arranged along a second direction, several positive electrode solder strips and several negative electrode solder strips arranged alternately along a first direction; several positive electrode patches are attached to the positive electrode solder strips one-to-one, and the positive electrode patches at the connection with the busbar have positive electrode pasting notches; several positive electrode pasting notches are arranged at intervals along the first direction; several negative electrode patches are attached to the negative electrode solder strips one-to-one.

[0010] The busbars are arranged along the first direction and placed on the battery cell. The busbars are electrically connected to the positive electrode welding strip through the positive electrode adhesive notch.

[0011] The adhesive pads are attached to the busbars and battery cells.

[0012] As an optional technical solution for assembling a busbar and a battery string, the positive electrode adhesive notch has three sets, and the three sets of positive electrode adhesive notches are arranged at intervals along the second direction; the busbar includes a first connecting strip and a second connecting strip;

[0013] The assembly method of the busbar and battery string includes the following steps:

[0014] First, attach the first connecting strip to the two sets of positive electrode adhesive notches at the ends of adjacent battery strings using a fixing adhesive piece. Then, attach the second connecting strip to the positive electrode adhesive notch in the middle of adjacent battery strings using a fixing adhesive piece.

[0015] As an optional technical solution for assembling a busbar and a battery string, two battery strings are first arranged at intervals along a first direction, then a first connecting strip is placed on the two battery strings to form an assembly, several assemblies are arranged at intervals along the first direction, and then a second connecting strip is placed at the positive electrode adhesive notch of the middle group.

[0016] As an optional technical solution for assembling a busbar and a battery string, all the battery strings are first arranged at intervals along a first direction, with adjacent battery strings forming a group along the first direction. Then, a first connecting strip is placed on two battery strings in the same group to form an assembly. Finally, a second connecting strip is placed at the positive electrode pasting notch of the middle group.

[0017] As an optional technical solution for assembling a busbar and a battery string, the method is characterized in that a plurality of second connecting strips are arranged at intervals along a first direction, the first and last second connecting strips are placed at a set of positive electrode adhesive notches in the middle and are respectively connected to the positive electrode solder strips on the first battery string and the last battery string; the second connecting strip in the middle position is placed at a set of positive electrode adhesive notches in the middle and is connected to the positive electrode solder strips on the two adjacent battery strings.

[0018] As an optional technical solution for assembling a busbar and a battery string, the negative electrode patch includes a negative electrode main patch and an insulating adhesive patch. The negative electrode main patch is attached to the negative electrode solder strip, and each negative electrode main patch has a negative electrode adhesive notch.

[0019] Before placing the busbar onto the battery cell, first attach the insulating adhesive patch to the negative electrode adhesive notch.

[0020] As an optional technical solution for assembling a busbar and a battery string, the negative electrode patch includes a negative electrode main patch and an insulating adhesive patch. The negative electrode main patch is attached to the negative electrode solder strip, and each negative electrode main patch has a negative electrode adhesive notch.

[0021] First, attach the insulating adhesive strip to the busbar, and then place the busbar with the insulating adhesive strip on the battery cell. At this time, the insulating adhesive strip corresponds to the negative electrode adhesive notch and covers the negative electrode adhesive notch.

[0022] A battery string includes several battery cells, several positive electrode solder strips and negative electrode solder strips of adjacent battery cells connected in series, a positive electrode patch attached to the outside of each positive electrode solder strip, and a negative electrode patch attached to the outside of each negative electrode solder strip, characterized in that the positive electrode patch has a positive electrode bonding notch.

[0023] The battery string assembly is made of busbars and the aforementioned battery strings using the assembly method described above.

[0024] Photovoltaic modules are made by laminating the aforementioned battery string arrangement components.

[0025] The present invention has at least the following beneficial effects:

[0026] This invention provides a busbar assembly method, a battery string, a battery string layout component, and a photovoltaic module. The assembly method of the busbar and battery string includes the following steps:

[0027] A number of battery strings are arranged at intervals along a first direction; wherein each battery string includes a number of battery cells arranged along a second direction, a number of positive electrode solder strips and a number of negative electrode solder strips arranged alternately along the first direction; a number of positive electrode patches are attached to the positive electrode solder strips one-to-one, and the positive electrode patches at the connection with the busbar have positive electrode adhesive notches; a number of positive electrode adhesive notches are arranged at intervals along the first direction; a number of negative electrode patches are attached to the negative electrode solder strips one-to-one; a busbar is extended and arranged along the first direction and placed on the battery cells, and the busbar is electrically connected to the positive electrode solder strips through the positive electrode adhesive notches; a fixing adhesive is attached to the busbar and the battery cells.

[0028] By attaching the busbar to the battery cell using a fixing adhesive patch, the connection between the busbar and the positive electrode solder strip is achieved, avoiding microcracks in the battery cell caused by the welding process and improving the yield rate. Secondly, the notch on the positive electrode allows the busbar to connect with the corresponding positive electrode solder strip at that point, improving connection reliability. The negative electrode patch ensures insulation between the busbar and the negative electrode solder strip, guaranteeing circuit safety. Finally, the fixing adhesive patch has a simple structure, requiring only the ability to adhere, resulting in low cost. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the arrangement of two battery strings in an embodiment of the present invention. The negative electrode patch does not have a negative electrode adhesive notch.

[0031] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0032] Figure 3 This is a schematic diagram of the structure in an embodiment of the present invention, showing the first connecting strip placed on two battery strings;

[0033] Figure 4 This is a schematic diagram of the battery string arrangement in an embodiment of the present invention. The negative electrode patch does not have a negative electrode adhesive notch.

[0034] Figure 5 This is a schematic diagram of the arrangement of two battery strings in an embodiment of the present invention, wherein the negative electrode patch has a negative electrode bonding notch;

[0035] Figure 6 for Figure 5 A magnified view of a section at point B in the middle;

[0036] Figure 7 In this embodiment of the invention, the insulating adhesive sheet is bonded to the negative electrode through a notch.

[0037] Figure 8 This is a schematic diagram of the structure of the first connecting strip placed on two battery strings in an embodiment of the present invention, with the insulating adhesive sheet bonded to the negative electrode adhesive notch;

[0038] Figure 9 This is a schematic diagram of the battery string arrangement component in an embodiment of the present invention, showing an insulating adhesive sheet bonded to the negative electrode adhesive notch;

[0039] Figure 10 In this embodiment of the invention, the insulating adhesive sheet is bonded to the first connecting strip;

[0040] Figure 11 This is a schematic diagram of the structure of the first connecting strip with an insulating adhesive sheet placed on two battery strings in an embodiment of the present invention;

[0041] Figure 12 In this embodiment of the invention, the insulating adhesive sheet is bonded to the second connecting strip;

[0042] Figure 13 This is a schematic diagram of the battery string arrangement component in an embodiment of the present invention, with an insulating adhesive sheet bonded to the busbar.

[0043] In the picture:

[0044] 100. Battery string; 110. Battery cell; 120. Positive electrode solder strip; 130. Negative electrode solder strip; 140. Positive electrode patch; 141. Positive electrode adhesive notch; 150. Negative electrode patch; 151. Negative electrode main patch; 152. Insulating adhesive sheet; 153. Negative electrode adhesive notch;

[0045] 200. Busbar; 210. First connecting bar; 220. Second connecting bar; 221. Busbar body; 222. Connecting part;

[0046] 300. Fixing adhesive patch. Detailed Implementation

[0047] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0048] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0049] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0050] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0051] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0052] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0053] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0054] like Figures 1 to 4 As shown, this embodiment provides a method for assembling a busbar and a battery string for manufacturing a photovoltaic module. The method for assembling the busbar and the battery string includes the following steps:

[0055] Several battery strings 100 are arranged at intervals along the first direction.

[0056] Each battery string 100 includes several battery cells 110 arranged along a second direction, several positive electrode solder strips 120 and several negative electrode solder strips 130 arranged alternately along a first direction; several positive electrode patches 140 are attached to the positive electrode solder strips 120 in a one-to-one correspondence, and the positive electrode patches 140 at the connection with the busbar 200 have positive electrode pasting notches 141; several positive electrode pasting notches 141 are arranged at intervals along the first direction; and several negative electrode patches 150 are attached to the negative electrode solder strips 130 in a one-to-one correspondence.

[0057] The busbar 200 is extended and arranged along the first direction and placed on the battery cell 110. The busbar 200 is electrically connected to the positive electrode solder strip 120 through the positive electrode adhesive notch 141.

[0058] The fixing adhesive piece 300 is attached to the busbar 200 and the battery cell 110.

[0059] By attaching the busbar 200 to the battery cell 110 using the fixing adhesive patch 300, the connection between the busbar 200 and the positive electrode solder strip 120 is achieved, avoiding microcracks in the battery cell 110 caused by the welding process and improving the yield rate. Secondly, the setting of the positive electrode adhesive notch 141 allows the busbar 200 to connect with the corresponding positive electrode solder strip 120 at this point, improving the connection reliability. The setting of the negative electrode patch 150 ensures insulation between the busbar 200 and the negative electrode solder strip 130, guaranteeing circuit safety. Finally, the fixing adhesive patch 300 has a simple structure, only needing to achieve the adhesive function, and is low in cost.

[0060] The specific number of positive electrode bonding notches 141 needs to be determined based on the structural configuration of the photovoltaic module. In this embodiment, there are three sets of positive electrode bonding notches 141, which are arranged at intervals along the second direction. The busbar 200 includes a first connecting strip 210 and a second connecting strip 220. The assembly method of the busbar and the battery string includes the following steps: first, the first connecting strip 210 is bonded to the two sets of positive electrode bonding notches 141 at the ends of adjacent battery strings 100 using a fixing adhesive piece 300; then, the second connecting strip 220 is bonded to the positive electrode bonding notch 141 at the middle position of the adjacent battery strings 100 using a fixing adhesive piece 300. Since the first connecting strip 210 and the second connecting strip 220 have different structures and different installation positions, the first connecting strip 210 and the second connecting strip 220 are assembled separately, which can be assembled in an assembly line manner, thus improving assembly efficiency.

[0061] Specifically, at least two battery strings 100 are first arranged at intervals along a first direction. Then, two first connecting strips 210 are placed on the two battery strings 100, and finally, a second connecting strip 220 is placed on the battery strings 100. Arranging the battery strings 100 first ensures sufficient spacing between adjacent strings 100, which helps ensure the matching of the relative positions of the first and second connecting strips 210 and 220 with the battery strings 100. It should be noted that after placing the first connecting strip 210, a fixing adhesive piece 300 is attached to the first connecting strip 210 and the battery pads 110 of the battery strings 100. Then, the second connecting strip 220 is placed, and finally, the fixing adhesive piece 300 is attached to the second connecting strip 220 and the battery pads 110 of the battery strings 100. This method reduces the waiting time for the first connecting strip 210, lowering the risk of misalignment; at the same time, it avoids vibration caused by placing the second connecting strip 220, which could lead to misalignment of the first connecting strip 210.

[0062] In the first embodiment of this invention, two battery strings 100 are first arranged at intervals along a first direction. Then, a first connecting strip 210 is placed on the two battery strings 100 to form an assembly. Several assemblies are arranged at intervals along the first direction. Then, a second connecting strip 220 is placed at the positive electrode pasting notch 141 in the middle group. This method requires a small platform area for placing the first connecting strip 210 on the two battery strings 100, enabling rapid assembly of the assemblies. In this embodiment, two battery strings 100 are fed at once by a stringer. Separating the placement and pasting steps of the first connecting strip 210 and the second connecting strip 220 reduces the probability of spatial interference between the busbar 200 placement mechanism and the busbar 200 pasting mechanism, facilitating the design of the busbar 200 placement mechanism and the busbar 200 pasting mechanism.

[0063] In the second embodiment of this invention, all battery strings 100 are first arranged at intervals along a first direction. Along the first direction, adjacent battery strings 100 are grouped together and correspond to a first connecting strip 210. Then, the first connecting strip 210 is placed on two battery strings 100 in the same group to form an assembly. Finally, the second connecting strip 220 is placed at the positive electrode adhesive notch 141 of the middle group. This method allows for the arrangement of the battery strings 100 and the placement of the first and second connecting strips 210 and 220 on the same platform, reducing the need for platform transfers.

[0064] It should be noted that the arrangement of the battery string 100 is completed by a layout machine. The structure and working principle of the layout machine can be implemented using technologies known in the field, and will not be described in detail here.

[0065] In some embodiments, a plurality of second connecting strips 220 are arranged at intervals along a first direction. The first second connecting strip 220 is placed at a set of positive electrode adhesive notches 141 in the middle and connects to the first battery string 100. The first and last second connecting strips 220 are placed at a set of positive electrode adhesive notches 141 in the middle and connect to the first battery string 100 and the last battery string 100, respectively. The second connecting strips 220 in the middle position (outside the first and last second connecting strips 220) are placed on two adjacent battery strings 100 to meet the current conduction requirements. Specifically, the first and last second connecting strips 220 are placed at a set of positive electrode adhesive notches 141 in the middle and connect to the positive electrode solder strips 120 on the first battery string 100 and the last battery string 100. The second connecting strips 220 in the middle position (outside the first and last second connecting strips 220) are placed at a set of positive electrode adhesive notches 141 in the middle and connect to the positive electrode solder strips 120 on two adjacent battery strings 100.

[0066] For example, the first connecting strip 210 is used to connect the first, second, third, fourth, fifth, and sixth battery strings 100. The first connecting strip 210 is placed at the positive electrode adhesive notch 141 on the end of the battery string 100 to connect the positive electrode solder strip 120. The second connecting strip 220 is used to connect the first, second, third, fourth, fifth, and sixth battery strings 100. The first connecting strip 210 is placed at the positive electrode adhesive notch 141 in the middle of the battery string 100 to connect the positive electrode solder strip 120.

[0067] In other embodiments, the busbar 200 may be placed on the workbench first, and then the battery string 100 may be placed on the busbar 200 in the first direction.

[0068] To ensure a reliable connection between the busbar 200 and the positive electrode solder strip 120, in some embodiments, after the fixing adhesive piece 300 is attached to the busbar 200, it is pressed and fixed by a pressing mechanism or by a rolling mechanism. The battery string 100 is provided by a string welding machine. The structure and working principle of the pressing mechanism, the rolling mechanism, and the string welding machine can be implemented using techniques known in the art, and will not be described in detail here.

[0069] Combination Figures 5 to 9As shown, in some embodiments, the negative electrode patch 150 includes a main negative electrode patch 151 and an insulating adhesive patch 152. The main negative electrode patch 151 is attached to the negative electrode solder strip 130, and each main negative electrode patch 151 has a negative electrode adhesive notch 153. Before placing the busbar 200 onto the battery cell 110, the insulating adhesive patch 152 is first attached to the negative electrode adhesive notch 153. This method helps to improve the fabrication efficiency of the battery string 100. At the same time, attaching the insulating adhesive patch 152 to the negative electrode adhesive notch 153 prevents the busbar 200 and the negative electrode solder strip 130 from contacting each other. In this case, the negative electrode patch 150 can use the same spacing method as the positive electrode patch 140 to form the negative electrode adhesive notch 153 during the pasting process, improving the consistency and reliability of the operation.

[0070] For example, firstly, two battery strings 100 are arranged at intervals along a first direction. Then, insulating adhesive sheets 152 are applied to all negative electrode adhesive notches 153. Next, a first connecting strip 210 is placed on the two battery strings 100 to form an assembly. Several assemblies are then arranged at intervals along the first direction. Finally, a second connecting strip 220 is placed at the positive electrode adhesive notch 141 in the middle group. The same robotic arm can be used to place the first connecting strip 210 and apply the insulating adhesive sheets 152.

[0071] In another example, two battery strings 100 are first arranged at intervals along a first direction. Then, an insulating adhesive sheet 152 is attached to the negative electrode adhesive notch 153 corresponding to the first connecting strip 210. Next, the first connecting strip 210 is placed on the two battery strings 100 to form an assembly. Then, several assemblies are arranged at intervals along the first direction. Then, an insulating adhesive sheet 152 is attached to the negative electrode adhesive notch 153 corresponding to the second connecting strip 220. Finally, the second connecting strip 220 is placed at the positive electrode adhesive notch 141 in the middle group. Part of the insulating adhesive sheet 152 and the first connecting strip 210 share one robotic arm, and part of the insulating adhesive sheet 152 and the second connecting strip 220 can share another robotic arm.

[0072] The timing of applying the insulating adhesive patch 152 can also be reasonably set based on the structure of each platform.

[0073] Combination Figure 5 , Figure 6 , Figures 10 to 13As shown, in some embodiments, the negative electrode patch 150 includes a main negative electrode patch 151 and an insulating adhesive patch 152. The main negative electrode patch 151 is attached to the negative electrode solder ribbon 130, and each main negative electrode patch 151 has a negative electrode adhesive notch 153. The insulating adhesive patch 152 is first attached to the busbar 200, and then the busbar 200 with the insulating adhesive patch 152 is placed on the battery cell 110. At this time, the insulating adhesive patch 152 corresponds to and covers the negative electrode adhesive notch 153. The above method helps to improve the manufacturing efficiency of the battery string 100, and at the same time, avoids contact between the busbar 200 and the negative electrode solder ribbon 130. In addition, the above method can also complete the attachment of the insulating adhesive patch 152 after the production of the busbar 200. Attaching the insulating adhesive patch 152 to the busbar 200 is simple to operate and does not require concern about damaging the battery string 100, thus improving operational safety.

[0074] For example, firstly, two battery strings 100 are arranged at intervals along a first direction. Then, an insulating adhesive sheet 152 is attached to a first connecting strip 210. The first connecting strip 210 with the insulating adhesive sheet 152 is placed on the battery cell 110. At this time, the insulating adhesive sheet 152 corresponds to and covers the negative electrode adhesive notch 153, forming an assembly. Based on this, the assembly is arranged at intervals along the first direction. Then, an insulating adhesive sheet 152 is attached to a second connecting strip 220. The second connecting strip 220 with the insulating adhesive sheet 152 is placed on the battery cell 110. At this time, the insulating adhesive sheet 152 corresponds to and covers the negative electrode adhesive notch 153.

[0075] In another example, two battery strings 100 are first arranged at intervals along a first direction. Then, insulating adhesive pieces 152 are attached to the first connecting strip 210 and the second connecting strip 220. The first connecting strip 210 with the insulating adhesive piece 152 is placed on the battery cell 110. At this time, the insulating adhesive piece 152 corresponds to and covers the negative electrode adhesive notch 153, forming an assembly. Based on this, the assembly is arranged at intervals along the first direction, and the second connecting strip 220 with the insulating adhesive piece 152 is placed on the battery cell 110. At this time, the insulating adhesive piece 152 corresponds to and covers the negative electrode adhesive notch 153.

[0076] This embodiment also provides a battery string, including a plurality of battery cells 110, a plurality of positive electrode solder strips 120 and negative electrode solder strips 130 connected in series with adjacent battery cells 110, a positive electrode patch 140 attached to the outside of each positive electrode solder strip 120 and a negative electrode patch 150 attached to the outside of each negative electrode solder strip 130, wherein the positive electrode patch 140 has a positive electrode pasting notch 141.

[0077] This embodiment also provides a battery string arrangement component, which is made of busbar 200 and battery string in the above embodiments using the assembly method of busbar and battery string in any of the above embodiments.

[0078] This embodiment also provides a photovoltaic module, which is manufactured from the battery string arrangement components of the above embodiment through a lamination method. Specifically, the structure of the photovoltaic module, in the lamination stacking order, generally includes a front panel, an upper encapsulating film, a battery string arrangement component, a lower encapsulating film, and a back panel. The front panel serves as a protective plate; the upper encapsulating film bonds the front panel to the battery string arrangement component and buffers stress; the battery string arrangement component converts solar energy into electrical energy through series / parallel connection; the lower encapsulating film bonds the battery string arrangement component to the back panel, and the back panel provides insulation, moisture protection, and weather resistance. Additional structures include, but are not limited to, an aluminum alloy frame and a junction box. Specific lamination methods can be implemented based on existing technology and will not be detailed here.

[0079] Exemplarily, the method for manufacturing a photovoltaic module includes the assembly method of busbars and cell strings in any of the above embodiments. The photovoltaic module includes: at least four cell strings 100, all of which are arranged at intervals along a first direction; each cell string 100 includes at least five cells 110, positive electrode solder strips 120, negative electrode solder strips 130, positive electrode patches 140, and negative electrode patches 150, all of which are arranged along a second direction, and a plurality of positive electrode solder strips 120 and a plurality of negative electrode solder strips 130 are arranged alternately at intervals along the first direction; a plurality of positive electrode patches 140 Each positive electrode patch 140 is attached to the positive electrode solder strip 120 in a one-to-one correspondence, with a positive electrode adhesive notch 141 for each patch; several positive electrode adhesive notches 141 are arranged at intervals along the first direction; several negative electrode patches 150 are attached to the negative electrode solder strip 130 in a one-to-one correspondence; the busbar 200 extends along the first direction, and the busbar 200 is connected to all the positive electrode solder strips 120 on at least one battery string 100 at the positive electrode adhesive notch 141; the fixing adhesive patch 300 is partially attached to the battery cell 110, and partially attached to the side of the busbar 200 away from the positive electrode solder strip 120.

[0080] It should be noted that each battery string 100 is provided with a number of positive electrode solder strips 120 and a number of negative electrode solder strips 130. In the second direction, the number of positive electrode solder strips 120 form a positive electrode group, and the number of negative electrode solder strips 130 form a negative electrode group. The number of positive electrode groups and the number of negative electrode groups are arranged alternately along the first direction.

[0081] The positive electrode adhesive notch 141 is provided in three sets, and the three sets of positive electrode adhesive notches 141 are arranged at intervals along a second direction. The busbar 200 includes two first connecting bars 210 and one second connecting bar 220. The two first connecting bars 210 are arranged at intervals along the second direction, and the second connecting bar 220 is disposed between the two first connecting bars 210 along the second direction. The first connecting bars 210 extend along a first direction to connect all positive electrode solder strips 120 on at least one battery string 100 at one set of positive electrode adhesive notches 141 at the end. The second connecting bar 220 extends at least partially along the first direction to connect all positive electrode solder strips 120 on at least one battery string 100 at one set of positive electrode adhesive notches 141 in the middle. The first connecting bars 210 extend along the first direction to connect all positive electrode solder strips 120 on two battery strings 100 at one set of positive electrode adhesive notches 141 at the end. A plurality of second connecting strips 220 are arranged at intervals along a first direction. At least a portion of the first second connecting strip 220 extends along the first direction to connect all positive electrode solder strips 120 on the first battery string 100 at a set of positive electrode adhesive notches 141 in the middle. At least a portion of the last second connecting strip 220 extends along the first direction to connect all positive electrode solder strips 120 on the last battery string 100 at a set of positive electrode adhesive notches 141 in the middle. At least a portion of the second connecting strip 220 at the middle position extends along the first direction to connect all positive electrode solder strips 120 on two adjacent battery strings 100 at a set of positive electrode adhesive notches 141 in the middle.

[0082] The second connecting strip 220 includes a current-collecting body 221 and a connecting part 222 connected to each other. The current-collecting body 221 extends along a first direction to connect to the positive electrode solder strip 120 on the battery string 100, and the connecting part 222 extends along a second direction to connect to the junction box and realize the convergence of current.

[0083] Among them, the positive electrode patch 140, the negative electrode patch 150, the fixing adhesive patch 300 and the insulating adhesive patch 152 are all strip-shaped adhesive films or tapes, and are made of insulating materials, such as EVA, POE, PET, EPE and other materials.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for assembling a busbar and a battery string, characterized in that, Includes the following steps: Several battery strings (100) are arranged at intervals along a first direction; Each battery string (100) includes several battery cells (110) arranged along a second direction, several positive electrode solder strips (120) and several negative electrode solder strips (130) arranged alternately along a first direction; several positive electrode patches (140) are attached to the positive electrode solder strips (120) in a one-to-one correspondence, and the positive electrode patches (140) at the connection with the busbar (200) have positive electrode pasting notches (141); several positive electrode pasting notches (141) are arranged at intervals along the first direction; several negative electrode patches (150) are attached to the negative electrode solder strips (130) in a one-to-one correspondence; The busbar (200) is extended and arranged along the first direction and placed on the battery cell (110). The busbar (200) is electrically connected to the positive electrode solder strip (120) through the positive electrode adhesive notch (141). The fixing adhesive piece (300) is attached to the busbar (200) and the battery cell (110).

2. The assembly method of the busbar and battery string according to claim 1, characterized in that, The positive electrode adhesive notch (141) has three sets, and the three sets of positive electrode adhesive notches (141) are arranged at intervals along the second direction; the busbar (200) includes a first connecting strip (210) and a second connecting strip (220). The assembly method of the busbar and battery string includes the following steps: First, attach the first connecting strip (210) to the two sets of positive electrode adhesive notches (141) at the ends of the adjacent battery strings (100) using the fixing adhesive piece (300). Then, attach the second connecting strip (220) to the positive electrode adhesive notch (141) in the middle position of the adjacent battery strings (100) using the fixing adhesive piece (300).

3. The assembly method of the busbar and battery string according to claim 2, characterized in that, First, two battery strings (100) are arranged at intervals along the first direction. Then, the first connecting strip (210) is placed on the two battery strings (100) to form an assembly. Several assemblies are arranged at intervals along the first direction. Then, the second connecting strip (220) is placed at the positive electrode pasting notch (141) of the middle group.

4. The assembly method of the busbar and battery string according to claim 2, characterized in that, First, arrange all the battery strings (100) at intervals along the first direction. Along the first direction, adjacent battery strings (100) are grouped together. Then, place the first connecting strip (210) on the two battery strings (100) in the same group to form an assembly. Finally, place the second connecting strip (220) at the positive electrode pasting notch (141) of the middle group.

5. The assembly method of the busbar and battery string according to claim 3 or 4, characterized in that, Several second connecting strips (220) are arranged at intervals along the first direction. The first and last second connecting strips (220) are placed at a set of positive electrode adhesive notches (141) in the middle and connected to the positive electrode solder strips (120) on the first battery string (100) and the last battery string (100) respectively. The second connecting strip (220) in the middle position is placed at a set of positive electrode adhesive notches (141) in the middle and connected to the positive electrode solder strips (120) on the two adjacent battery strings (100).

6. The assembly method of the busbar and battery string according to claim 1, characterized in that, The negative electrode patch (150) includes a negative electrode main patch (151) and an insulating adhesive patch (152). The negative electrode main patch (151) is attached to the negative electrode solder strip (130), and each negative electrode main patch (151) has a negative electrode adhesive notch (153). Before placing the busbar (200) onto the battery cell (110), first attach the insulating adhesive sheet (152) to the negative electrode adhesive notch (153).

7. The assembly method of the busbar and battery string according to claim 1, characterized in that, The negative electrode patch (150) includes a negative electrode main patch (151) and an insulating adhesive patch (152). The negative electrode main patch (151) is attached to the negative electrode solder strip (130), and each negative electrode main patch (151) has a negative electrode adhesive notch (153). First, attach the insulating adhesive patch (152) to the busbar (200), and then place the busbar (200) with the insulating adhesive patch (152) on the battery cell (110). At this time, the insulating adhesive patch (152) corresponds to the negative electrode adhesive notch (153) and covers the negative electrode adhesive notch (153).

8. A battery string, wherein the battery string is used in the assembly method of the busbar and battery string according to any one of claims 1-7, the battery string comprising a plurality of battery cells (110), a plurality of positive electrode solder strips (120) and negative electrode solder strips (130) of adjacent battery cells connected in series, a positive electrode patch (140) attached to each positive electrode solder strip (120) and a negative electrode patch (150) attached to each negative electrode solder strip (130), characterized in that, The positive electrode patch (140) has a positive electrode adhesive notch (141).

9. A battery string arrangement component, characterized in that, The busbar and the battery string as described in claim 8 are manufactured using the assembly method of the busbar and battery string as described in any one of claims 1-7.

10. A photovoltaic module, characterized in that, It is made by lamination of the battery string arrangement component as described in claim 9.

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