Photovoltaic module for testing

Abstract

The utility model discloses a photovoltaic assembly used for testing. The photovoltaic assembly specifically comprises a plurality of laminated pieces and a splicing frame arranged on the peripheries of the laminated pieces. Wherein the laminated part is obtained by assembling a to-be-tested part and a plurality of independent standard parts matched with the to-be-tested part; the standard component comprises at least one of a standard cover plate, a standard adhesive film, a standard battery array and a standard back plate; the to-be-tested component is one of a to-be-tested cover plate, a to-be-tested battery array and a to-be-tested back plate; wherein every two adjacent laminated pieces are spliced into the whole laminated piece through the splicing frame. The components in the photovoltaic module to be tested can be reused, so that the material and labor cost is reduced, and the assembling flexibility of the photovoltaic module to be tested is improved. And moreover, the photovoltaic module to be tested can be used for synchronously testing various different laminated pieces at one time, so that the testing efficiency of the photovoltaic module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module manufacturing technical field especially relates to a photovoltaic module for testing. BACKGROUND

[0002] In the testing process of the existing photovoltaic module, the photovoltaic module of conventional size is prepared by laminating the component to be tested and other non-testing components (for example, laminating the battery array to be tested and other non-testing cover plate, back plate, etc.), to meet the requirements of the testing device and realize independent testing of the prepared photovoltaic module. However, the photovoltaic module of conventional size is often set to a large specification in order to reduce testing errors, and a large amount of manpower and material costs are required to prepare independent photovoltaic modules for each component to be tested. Moreover, due to the material properties of the front adhesive film and the rear adhesive film, the existing photovoltaic module is fused by the laminating process after lamination to form an overall adhesive film layer sealed outside the battery array. This results in the photovoltaic module for testing being a whole structure, and the components cannot be reused after testing is completed. SUMMARY

[0003] Therefore, the utility model embodiment provides a photovoltaic module for testing, which can assemble different laminates obtained from different components to be tested and a plurality of independent standard components matched with the components to be tested into a whole through the splicing frame arranged on the outer periphery of the laminates, thereby improving the flexibility of assembling the photovoltaic module to be tested, realizing simultaneous testing of a plurality of laminates, and greatly improving the testing efficiency. Moreover, the independent standard components can be reused, thereby improving the reusability of the components in the photovoltaic module for testing and reducing the material and labor costs.

[0004] To solve the above technical problems, the utility model provides the following technical scheme:

[0005] In a first aspect, the utility model provides a photovoltaic module for testing, comprising: a plurality of laminates and a splicing frame arranged on the outer periphery of the laminates; wherein the laminates are assembled from a component to be tested and a plurality of independent standard components matched with the component to be tested; the standard components include at least one of a standard cover plate, a standard adhesive film, a standard battery array, and a standard back plate; the component to be tested is one of a cover plate to be tested, a battery array to be tested, and a back plate to be tested; wherein each two adjacent laminates are spliced into a laminate whole through the splicing frame.

[0006] Optionally, the splicing frames on each two adjacent laminates are spliced through at least one set of splicing components.

[0007] Optionally, the splicing assembly comprises a slot arranged on one of the splicing frames and a socket arranged on the other splicing frame and matched with the slot; wherein the position of the slot corresponds to the position of the first solder strip in the adjacent laminated piece, for placing the first solder strip.

[0008] Optionally, a first solder strip through hole for placing the first solder strip is arranged on the side of the slot adjacent to the splicing frame; a conductive part corresponding to the first solder strip through hole is arranged on the side of the slot adjacent to the socket; wherein the inside of the conductive part is a hollow structure; after the first solder strip is placed into the first solder strip through hole of the slot, the first solder strip is located in the hollow structure of the conductive part, so that the first solder strip is electrically connected with the conductive part.

[0009] Optionally, a second solder strip through hole for placing the second solder strip in the laminated piece adjacent to the socket is arranged on the socket; wherein the second solder strip through hole is arranged through and corresponds to the position of the conductive part; after one of the slots and one of the sockets are spliced, the conductive part on the slot is inserted into the second solder strip through hole on the socket and is electrically connected with the second solder strip in the second solder strip through hole.

[0010] Optionally, the slot further comprises a plurality of concave structures on one side of the conductive part and a plurality of insertion bodies on the side opposite to the concave structures; the socket further comprises a plurality of convex structures matched with the concave structures and a plurality of insertion grooves for inserting the insertion bodies.

[0011] Optionally, further comprising: a plurality of outer frames arranged around the whole laminated piece and a plurality of interlocking pieces arranged at the connection of each adjacent two outer frames; wherein the two ends of the interlocking piece are respectively connected with the adjacent two outer frames, so as to integrally connect the adjacent two outer frames.

[0012] Optionally, one or more interlocking holes are arranged on the outer frame and interlocking wings matched with the interlocking holes are arranged on the interlocking piece; each interlocking piece is connected with the adjacent two outer frames through the interlocking wings and the interlocking holes.

[0013] Optionally, the interlocking piece is in L-shaped structure; a plurality of interlocking wings are arranged on the two sides of the L-shaped structure; wherein the interlocking wings on different sides are respectively connected with different outer frames.

[0014] Optionally, a sealing layer is further arranged between the laminated piece and the splicing frame.

[0015] The technical scheme of the first aspect of the utility model has the following advantages or beneficial effects: based on the fact that the laminated piece is assembled by the to-be-tested component and a plurality of independent standard components matched with the to-be-tested component, deformation and chemical change are not likely to occur during testing, so the laminated piece can still be reused after testing is completed, the reuse rate of each component in the photovoltaic assembly for testing is improved, material and labor costs are reduced, and the flexibility of assembly of the to-be-tested photovoltaic assembly is improved. Moreover, the assembly of each adjacent two laminated pieces after splicing by the splicing frame into a laminated piece whole serves as the photovoltaic assembly for testing, a plurality of different laminated pieces can be tested synchronously at one time, and the testing efficiency of the photovoltaic assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings are used to better understand the utility model and do not constitute improper limitation on the utility model. Among them:

[0017] Figure 1 is a flowchart of a photovoltaic assembly for testing according to an embodiment of the utility model;

[0018] Figure 2 is a main flowchart of preparation of a standard adhesive film according to an embodiment of the utility model;

[0019] Figure 3 is a main flowchart of step S103 according to an embodiment of the utility model;

[0020] Figure 4 is a structural diagram of a slot and a socket according to an embodiment of the utility model;

[0021] Figure 5 is a top view of a photovoltaic assembly overall structure according to an embodiment of the utility model;

[0022] Figure 6 is a top view of another photovoltaic assembly overall structure according to an embodiment of the utility model;

[0023] Figure 7 is a structural diagram of the arrangement of a plurality of layers of components in a laminated piece according to an embodiment of the utility model;

[0024] Figure 8 is a structural diagram of the arrangement position of a slot and a socket according to an embodiment of the utility model;

[0025] Figure 9 is a structural diagram of an interlocking hole and an interlocking wing according to an embodiment of the utility model;

[0026] Figure 10 is a diagram of the mounting position between an interlocking piece and an outer frame according to an embodiment of the utility model;

[0027] Figure 11 is a schematic diagram of the interlocking piece according to an embodiment of the present application;

[0028] Figure 12 is a schematic diagram of the positional relationship between the first solder strip through hole and the first solder strip on the slot according to an embodiment of the present application.

[0029] The reference signs are as follows:

[0030] 1 - laminated piece; 2 - splicing frame; 21 - splicing assembly; 211 - slot; 212 - socket; 213 - conductive piece; 214 - second solder strip through hole; 215 - concave structure; 216 - plug-in body; 217 - convex structure; 218 - plug-in slot; 3 - outer frame; 31 - interlocking hole; 4 - interlocking piece; 41 - interlocking wing;

[0031] 100 - back plate; 200 - rear adhesive film; 300 - battery array; 400 - front adhesive film; 500 - cover plate; 600 - sealing layer. DETAILED DESCRIPTION

[0032] A solar cell is a kind of photovoltaic semiconductor wafer that directly generates electricity by using sunlight, also known as "solar chip" or "photovoltaic cell", which can output voltage and generate current in the case of a loop as long as it is illuminated by light with a certain illumination condition. In physics, it is called solar photovoltaic (Photovoltaic, abbreviated as PV) and photovoltaic. In order to facilitate and clearly describe the preparation method of the solar cell and the solar cell of the present application, the exemplary embodiments of the present application will be described below in conjunction with the drawings, which include various details of the embodiments of the present application to help understanding, which should be considered only as exemplary. Therefore, those skilled in the art should realize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, in order to be clear and concise, the description of well-known functions and structures is omitted in the following description.

[0033] In an embodiment of the present application, as shown in Figure 1 The preparation method of the photovoltaic module for testing can include the following steps:

[0034] Step S101, preparing each independent standard component; the standard component includes at least one of a standard cover plate, a standard adhesive film, a standard battery array and a standard back plate;

[0035] Step S102, assembling a plurality of to-be-tested components with the matched standard components respectively to obtain a plurality of laminated pieces 1; wherein the to-be-tested component is one of a to-be-tested cover plate, a to-be-tested battery array and a to-be-tested back plate;

[0036] Step S103, mounting the splicing frame 2 on each laminated piece 1, and splicing the plurality of laminated pieces 1 by using the splicing frame 2 to obtain a photovoltaic module for testing.

[0037] Wherein, in the actual testing of the photovoltaic module, usually a certain component in the module is taken as a single variable for testing, for example, when testing the cover plate, the cover plate to be tested needs to be laminated with other standard adhesive film, standard cell array, and standard back plate to form a complete photovoltaic module, and then the testing can be performed. Therefore, in the embodiment of the utility model, the component to be tested refers to the single component to be tested, and the standard component matched with it refers to other components that together form the photovoltaic module with the single component.

[0038] In the actual testing process of the photovoltaic module, the cell array, the cover plate, and the back plate in the photovoltaic module are usually tested, while the front adhesive film and the rear adhesive film have less influence on the photovoltaic module, and the material is relatively universal. Therefore, the component to be tested in the embodiment of the utility model mainly refers to one of the cover plate to be tested, the cell array to be tested, and the back plate to be tested. In addition, the standard component in step S101 refers to a component whose performance and parameters meet the requirements prepared according to the industry specifications. Specifically, the standard adhesive film in step S101 can be used as the front adhesive film or the rear adhesive film when assembled with the component to be tested. Generally, the front adhesive film and the rear adhesive film are made of the same material, so the embodiment of the utility model only prepares one standard adhesive film. It can be understood that when the front adhesive film and the rear adhesive film are different in actual application, standard front adhesive film and standard rear adhesive film can be prepared respectively, and for different materials of the cover plate or the back plate, a plurality of standard cover plates and standard back plates can be prepared according to the different materials to select according to the actual needs. The embodiment of the utility model does not make specific limitation.

[0039] For the process of preparing the standard adhesive film in step S101, an optional embodiment, as shown in Figure 2 , includes:

[0040] Step S201, laminating the standard back plate, the first anti-adhesive layer, the adhesive film layer, the second anti-adhesive layer, and the standard cover plate from bottom to top;

[0041] Step S202, laminating by using a laminator until the adhesive film layer is formed;

[0042] Step S203, after laminating, sequentially removing the standard cover plate, the second anti-adhesive layer, the first anti-adhesive layer, and the standard back plate to obtain the standard adhesive film.

[0043] It should be noted that, in the prior art, although the front adhesive film and the rear adhesive film are also laminated by laminating, the front adhesive film and the rear adhesive film are non-transparent and have fluidity before lamination, and cannot be used as an independent part, and must be subjected to a lamination process, so that the adhesive film changes physically from a non-transparent flow material to a transparent solidified material, and is bonded with the battery array to form a whole, thereby obtaining the final photovoltaic module. Unlike the prior art, the independent standard adhesive film prepared in the embodiment of the utility model is in a transparent solidified state after curing, and can be directly used as a component for assembly, and will not be bonded with the battery array during assembly of the photovoltaic module, nor will it change physically during assembly. After testing, it can also be re-separated into an independent part and reused.

[0044] For the first anti-adhesion layer and the second anti-adhesion layer, the purpose is to separate the adhesive film layer from the back plate and the cover plate, so that the adhesive film layer can be formed into a standard adhesive film during lamination. Therefore, the material of the first anti-adhesion layer and the second anti-adhesion layer should be a material that does not adhere to the adhesive film layer. In an optional embodiment, the material of the first anti-adhesion layer and / or the second anti-adhesion layer is a non-stick polytetrafluoroethylene cloth or a glue-resistant release film.

[0045] For the specific process of lamination in step S202, in an optional embodiment, the lamination temperature is 100-160°C, for example, 100°C, 120°C, 130°C, 150°C, 160°C, etc. Specifically, the lamination process is divided into multiple processes:

[0046] (1) First, set both the upper chamber and the lower chamber to a vacuum state for vacuum treatment, for 60-420s, so that the pressure of the upper chamber and the lower chamber is-110kPa to-90kPa, for example, it can be-110kPa, -100kPa or-90kPa, etc.

[0047] (2) Change the upper chamber to an inflation state, inflate the pressure of the upper chamber to-90kPa to-75kPa, for example, it can be-90kPa, -80kPa or-75kPa, etc., while ensuring that the lower chamber is always in a vacuum state, and the pressure is maintained at-110kPa to-90kPa, for example, it can be-110kPa, -100kPa or-90kPa, etc. Lamination for 10-60s, for example, it can be 10s, 20s, 30s, 40s, 50s or 60s, etc.

[0048] (3) Adjust the pressure of the upper chamber to-55kPa to-45kPa, for example, it can be-55kPa, -50kPa or-45kPa, etc., and the lower chamber maintains the same pressure, and continues to laminate for 10-60s, for example, it can be 10s, 20s, 30s, 40s, 50s or 60s, etc.

[0049] (4) Adjust the pressure of the upper chamber to -35 kPa to -25 kPa, such as -35 kPa, -20 kPa, or -25 kPa, etc., and keep the pressure of the lower chamber unchanged, continue laminating for 180 s to 600 s, such as 180 s, 200 s, 300 s, 400 s, 500 s, or 600 s, etc.

[0050] (5) Adjust both the upper chamber and the lower chamber to the inflation state, and continue laminating for 30 s to 60 s, such as 30 s, 40 s, 50 s, or 60 s, etc. Through the above process, the lower chamber can be used to exhaust the air in the adhesive film layer, eliminate the air bubbles generated during the laminating process, and realize the molding of the adhesive film layer. At the same time, the pressure difference between the upper chamber and the lower chamber can make the adhesive film layer completely melt, so as to obtain a transparent standard adhesive film.

[0051] After obtaining each standard component, the standard component matched with the to-be-tested component can be assembled according to the requirements of the to-be-tested component to obtain the laminated component 1. For example, when the to-be-tested component is a to-be-tested cover plate, the to-be-tested cover plate, the standard adhesive film, the standard battery array, and the standard back plate are assembled to obtain the laminated component 1, and when the to-be-tested component is a to-be-tested battery array, the standard cover plate, the standard adhesive film, the to-be-tested battery array, and the standard back plate are assembled to obtain the laminated component 1.

[0052] For the specific process of assembly, it is also realized by laminating. However, compared with the laminating process for preparing the standard adhesive film in step S202, the laminating in step S102 is only for assembling multiple components, and does not need to change the physical properties of the adhesive film, so the normal temperature laminating technology can be used. Compared with the laminating process in step S202, the pressure of the upper chamber and the lower chamber can be appropriately reduced, and the laminating time can be shortened, so as to achieve the purpose of assembly. Specifically, it can include:

[0053] (1) Set the upper chamber and the lower chamber to the vacuum state, and the pressure is -40 kPa to -20 kPa, such as -40 kPa, -30 kPa, or -20 kPa, etc., and the vacuum time is 30 s to 70 s, such as 30 s, 40 s, 50 s, 60 s, or 70 s, etc.

[0054] (2) Adjust the upper chamber to the inflation state, and set the pressure to -15 kPa to -5 kPa, such as -15 kPa, -10 kPa, or -5 kPa, etc., keep the pressure of the lower chamber unchanged, and laminate for 30 s to 600 s, such as 30 s, 100 s, 300 s, 500 s, or 600 s, etc.

[0055] (3) Set both the upper chamber and the lower chamber to the inflation state, and laminate for 10 s to 30 s, such as 10 s, 20 s, 30 s, etc.

[0056] It should be noted that in the prior art, each laminated piece 1 is tested, and therefore the testing equipment needs to be installed separately for each laminated piece 1, which increases the complexity of testing. Therefore, the embodiment of the utility model splices multiple laminated pieces 1 by using the splicing frame 2, and only one testing equipment needs to be installed, so that multiple laminated pieces 1 can be tested at the same time, thereby greatly improving the testing efficiency.

[0057] For step S103, in an optional embodiment, as shown in Figure 3 , it includes:

[0058] Step S301, the splicing frame 2 is installed around each laminated piece 1, and a sealing layer is filled between the splicing frame 2 and the laminated piece 1;

[0059] Step S302, the multiple laminated pieces 1 are connected in series as a whole by using the slots 211 and the sockets 212 respectively arranged on the side of the splicing frame 2.

[0060] Step S303, the outer frame 3 is installed around the whole laminated piece 1, and the outer frame 3 is fixed to the whole laminated piece 1 by using the interlocking piece 4, so as to obtain the photovoltaic module for testing.

[0061] In order to ensure the sealing performance of each laminated piece 1 during testing, the splicing frame 2 is arranged around the laminated piece 1, and the laminated piece 1 is sealed by the sealing layer between the splicing frame 2 and the laminated piece 1.

[0062] For the slots 211 and the sockets 212 in step S302, in an optional embodiment, when multiple laminated pieces 1 need to be connected in series, the slots 211 and the sockets 212 can be arranged on the two symmetrical sides of the laminated piece 1 respectively, as shown in Figure 4 , so that the left laminated piece 1 can be inserted with the right laminated piece 1 by arranging the slot 211 on the right side and the socket 212 on the left side, thereby connecting the multiple laminated pieces 1 in series. It can be understood that in the actual testing process, multiple rows of laminated pieces 1 can be arranged, as shown in Figure 5 , and each row of laminated pieces 1 is connected in series as a whole, and the multiple rows of laminated pieces 1 are fixed as a whole by using the outer frame 3 and the interlocking piece 4.

[0063] In conclusion, the preparation method of the photovoltaic module for testing provided by the embodiments of the present application can prepare various independent standard components, can select the standard components matched with the to-be-tested components according to the requirements of the to-be-tested components, and can assemble the selected standard components to obtain different multiple laminates, thereby improving the flexibility of the photovoltaic module preparation process. Then, the assembly obtained by splicing the multiple laminates can be used as the photovoltaic module for testing, and the multiple different laminates can be tested synchronously at one time, thereby improving the testing efficiency of the photovoltaic module. In addition, since the various standard components are relatively independent, the standard components will not be deformed and chemically changed in the testing process, and therefore the standard components can be reused after the testing is completed, thereby improving the reuse rate of the photovoltaic module.

[0064] Figure 5 and Figure 6 The specific structure of the photovoltaic module for testing provided by the embodiments of the present application is shown. Among them, Figure 5 and Figure 6 are top views of the overall structure of the photovoltaic module, but Figure 5 mainly to show the setting position of the splicing assembly 21 and the connection relationship between the laminates 1, the outer frame 3 and the interlocking pieces 4, and therefore the specific structure of the laminates 1 and the splicing frame 2 is simplified, and Figure 6 mainly to show the position relationship between the splicing frame 2 and the laminates 1, and therefore the outer structures such as the outer frame 3 and the interlocking pieces 4 are not shown in Figure 6 .

[0065] As shown in Figure 5 and Figure 6 , the photovoltaic module for testing provided by the present application comprises: multiple laminates 1 and a splicing frame 2 arranged on the outer periphery of the laminates 1; wherein the laminates 1 are assembled by a to-be-tested component and multiple independent standard components matched with the to-be-tested component; the to-be-tested component is mainly one of a to-be-tested cover plate, a to-be-tested battery array and a to-be-tested back plate, and the standard component comprises at least one of a standard cover plate, a standard adhesive film, a standard battery array and a standard back plate; wherein each two adjacent laminates 1 are spliced by the splicing frame 2 to obtain a laminate whole.

[0066] In the assembly process, the standard components can be selected according to the to-be-tested components to assemble the complete laminates 1. Exemplarily, the setting structure of the multiple layers of components in the laminates 1 is as shown in Figure 7As shown, from top to bottom are: cover plate 500, front adhesive film 400, battery array 300, rear adhesive film 200, back plate 100. When the component to be tested is a cover plate to be tested, then the cover plate to be tested, the standard adhesive film, the standard battery array and the standard back plate are stacked and assembled to obtain the photovoltaic module to be tested. In addition, in order to ensure the sealing performance and insulation performance between the laminated part 1 and the splicing frame 2, a sealing layer is further arranged between the laminated part 1 and the splicing frame 2 in the embodiment of the utility model, which can be specifically as shown in the structure of 600. Figure 7 The sealing layer can be obtained by injecting sealing material into the gap between the laminated part 1 and the splicing frame 2 and drying after the splicing frame 2 is installed outside the laminated part 1. It can also be a pre-prepared film structure, that is, the film-shaped sealing layer is first attached and placed outside the laminated part 1, and then the outermost splicing frame 2 is installed, so that under the action of the external force of the splicing frame 2, the film-shaped sealing layer is clamped between the splicing frame 2 and the laminated part 1, thereby realizing the sealing effect.

[0067] In an alternative embodiment, the adjacent laminated parts 1 are actually spliced by the splicing assembly 21 on the splicing frame 2, that is, the splicing frame 2 on each adjacent two laminated parts 1 is spliced by at least one set of splicing assemblies 21. Exemplarily, one or more sets of splicing assemblies 21 can be arranged between the adjacent two splicing frames 2 according to the splicing firmness. In an alternative embodiment, in order to facilitate splicing, the splicing frame 2 with the splicing assembly 21 can be directly produced, and different styles of splicing frames 2 are generated for different setting positions and different setting numbers, so that in the actual application process, the installer can directly select the splicing frame 2 according to the needs of the splicing direction.

[0068] In a further alternative embodiment, as shown in Figure 4 and Figure 8As shown, the splicing assembly 21 comprises a slot 211 arranged on one splicing frame 2 and a socket 212 arranged on the other splicing frame 2 and matched with the slot 211; wherein the position of the slot 211 corresponds to the position of the first solder strip in the adjacent laminated piece 1, for placing the first solder strip. It can be seen from the above that the splicing assembly 21 in the utility model actually comprises the slot 211 and the socket 212 arranged on different splicing frames 2, so as to realize the connection between two splicing frames 2 by the plug-in connection between the slot 211 and the socket 212, and then realize the connection between two laminated pieces 1. It can be understood that in order to be able to test a plurality of laminated pieces 1 in series, it is necessary to connect the solder strips between different laminated pieces 1 into one, so as to realize the electrical connection between a plurality of laminated pieces 1 by the solder strip, therefore the slot 211 in the utility model embodiment needs to correspond to the position of the first solder strip in the adjacent laminated piece 1, so as to facilitate the insertion of the first solder strip in the adjacent laminated piece 1 into the slot 211, and then realize the electrical connection between the laminated pieces 1 by the plug-in connection between the slot 211 and the socket 212. Figure 8 The first solder strip in the left laminated piece 1 is electrically connected with the solder strip in the right laminated piece 1.

[0069] It can be understood that the setting positions of the slot 211 and the socket 212 are not necessarily symmetrically arranged on both sides of the splicing frame 2, and the slot 211 and the socket 212 can be arranged on one side of the splicing frame 2. Figure 5 For the laminated piece 1 located in the middle of each row, the slot 211 and the socket 212 on the splicing frame 2 are used to realize the electrical connection between a plurality of laminated pieces 1 in the horizontal direction, therefore the slot 211 and the socket 212 can be symmetrically arranged on both sides of the splicing frame 2. For the laminated piece 1 located at the head and tail of each row, in an alternative embodiment, the slot 211 and the socket 212 arranged on the upper and lower splicing frames 2 can also realize the S-shaped electrical connection of a plurality of laminated pieces 1. Therefore, a plurality of splicing frames 2 with different shapes can be produced according to different setting positions of the slot 211 and the socket 212, and in the actual application process, the series connection between a plurality of laminated pieces 1 can be realized according to the positions of the laminated pieces 1 that need to be electrically connected.

[0070] For how to place the first solder strip in the slot 211, in a further alternative embodiment, as shown in Figure 12The first solder strip is placed in the first solder strip through hole of the slot 211. The first solder strip is located in the hollow structure of the conductive member 213, so that the first solder strip is electrically connected with the conductive member 213. As can be seen, by arranging the first solder strip through hole and the corresponding conductive member 213, the first solder strip arranged in the laminated piece 1 on one side of the slot 211 can be inserted into the hollow structure of the conductive member 213, so that the first solder strip is fixed by the conductive member 213. Since the conductive member 213 has electrical conductivity, the first solder strip inside the conductive member 213 can be electrically connected with the conductive member 213, so that after the socket 212 is inserted, electrical connection with the adjacent laminated piece 1 (i.e. another laminated piece 1 adjacent to the socket 212) can be achieved. For example, the conductive member 213 can be a hollow cylinder or a hollow prism, and the hollow structure is circular, with a radius slightly larger than that of the first solder strip, so as to avoid displacement of the first solder strip after being placed in the conductive member 213, thereby causing poor electrical connection. It can be understood that the above arrangement only fixes the first solder strip on one side of the slot 211. In order to ensure effective connection between the first solder strip of the laminated piece 1 on one side of the slot 211 and the solder strip of another laminated piece 1 on one side of the socket 212, the solder strip on one side of the socket 212 also needs to be fixed to ensure electrical connection with the first solder strip. Therefore, in a further optional embodiment, as shown in Figure 12 The socket 212 is provided with a second solder strip through hole 214 for placing the second solder strip of the laminated piece 1 adjacent to the socket 212. The second solder strip through hole 214 is arranged through and corresponds to the position of the conductive member 213. After the adjacent slot 211 and socket 212 are spliced, the conductive member 213 on the slot 211 is inserted into the second solder strip through hole 214 on the socket 212 and is electrically connected with the second solder strip in the second solder strip through hole 214. That is, for the through-arranged second solder strip through hole 214, one end is used to insert the conductive member 213, and the other end is used to insert the second solder strip, so that the conductive member 213 in the second solder strip through hole 214 contacts the second solder strip, thereby achieving electrical connection. It can be understood that in order to ensure the effectiveness of the connection, the hole diameters of the two ends of the second solder strip through hole 214 can be different, that is, the hole diameter of one end for inserting the conductive member 213 corresponds to the cross-sectional diameter of the conductive member 213, and the hole diameter of the other end for inserting the second solder strip corresponds to the cross section of the second solder strip, and the center line of the second solder strip can coincide with the axis of the second solder strip through hole 214, so that the second solder strip is located in the middle of the second solder strip through hole 214, so as to ensure that the second solder strip and the conductive member 213 will not be misaligned and cannot be connected.

[0071] To further ensure the firmness of the insertion between the slot 211 and the socket 212, in an alternative embodiment, the slot 211 further comprises a plurality of concave structures 215 on one side of the conductive piece 213 and a plurality of insertion bodies 216 on the opposite side of the concave structures; the socket 212 further comprises a plurality of convex structures 217 matched with the concave structures 215 and a plurality of insertion grooves 218 matched with the insertion bodies 216. That is, in the process of realizing the insertion between the slot 211 and the socket 212, in addition to inserting the conductive piece 213 into the second solder strip through hole 21, the insertion between the convex structure 217 and the concave structure 215 and the insertion between the insertion body 216 and the insertion groove 218 is also realized synchronously, further ensuring the firmness of the insertion.

[0072] In an alternative embodiment, as shown in Figure 5 The photovoltaic module provided by the utility model further comprises a plurality of outer frames 3 arranged around the plurality of laminated pieces and a plurality of interlocking pieces 4 arranged at the connecting positions of every two adjacent outer frames 3; wherein the two ends of the interlocking piece 4 are connected with the two adjacent outer frames 3 respectively to integrally connect the two adjacent outer frames 3. Figure 5 It can be known that the utility model discloses an interlocking piece 4 at the connecting position of every two outer frames 3, and when the outer frames 3 form a rectangle, the interlocking pieces 4 are arranged at the four corners of the rectangle. Through the arrangement of the interlocking pieces 4, the outer frames 3 and the plurality of laminated pieces 1 can be fixed integrally to ensure the stability of the connection between the plurality of laminated pieces 1 during the test.

[0073] In a further alternative embodiment, as shown in Figure 9 and Figure 10 One or more interlocking holes 31 are arranged on the outer frame 3, and an interlocking wing 41 matched with the interlocking hole 31 is arranged on the interlocking piece 4; the two ends of every interlocking piece 4 are connected with the two adjacent outer frames 3 respectively through the clamping of the interlocking wing 41 and the interlocking hole 31. Wherein, Figure 9 The position relationship between the interlocking hole 31 and the interlocking wing 41 is shown, Figure 10 The mounting position between the interlocking piece 4 and the outer frame 3 is shown. From Figure 9 It can be known that the positions of the interlocking hole 31 and the interlocking wing 41 are arranged correspondingly, and the plurality of outer frames 3 can be effectively integrally connected by the interlocking piece 4 through the clamping between the interlocking hole 31 and the interlocking wing 41.

[0074] Further, Figure 11 The three-dimensional structure schematic diagram of the interlocking piece 4 is shown, from Figure 11It can be seen that the interlocking wing 41 on the interlocking piece 4 can be a strip-shaped or columnar structure with a certain elasticity in an alternative embodiment. When the interlocking wing 41 and the interlocking hole 31 are clamped, a certain deformation of the interlocking wing 41 is caused by external force, so that the interlocking wing 41 penetrates from one side to the other side of the interlocking hole 31, and after penetrating out of the interlocking hole 31, the elastic deformation is restored, so as to realize the clamping of the interlocking piece 4 on the outer frame 3 by the strip-shaped or columnar structure of the interlocking wing 41.

[0075] As can be seen, based on the fact that the laminated piece 1 is assembled by the to-be-tested component and a plurality of independent standard components matched with the to-be-tested component, deformation and chemical changes are not easy to occur during the test process, so after the test is completed, the laminated piece 1 can still be reused, thereby improving the reuse rate of each component in the photovoltaic assembly for testing, reducing material and labor costs, and improving the flexibility of assembly of the photovoltaic assembly to be tested. Moreover, the assembly of each adjacent two laminated pieces 1 after being spliced into a laminated piece whole by the splicing frame 2 can be used as a photovoltaic assembly for testing, so that a plurality of different laminated pieces can be tested synchronously at one time, thereby improving the test efficiency of the photovoltaic assembly.

[0076] Embodiment 1

[0077] A preparation method of a standard adhesive film comprises:

[0078] S1, placing a standard glass back plate on a stage, laying a polytetrafluoroethylene cloth with a larger surface area than the standard glass back plate on the upper surface of the back plate, cutting the adhesive film layer to a size corresponding to the laminated piece, and then laying the adhesive film layer on the polytetrafluoroethylene cloth, and then stacking a layer of polytetrafluoroethylene cloth and a standard glass cover plate on the adhesive film layer to obtain a laminated structure;

[0079] S2, placing the laminated structure into a laminator for lamination; wherein the lamination temperature is 150°C, both the upper chamber and the lower chamber are in a vacuum state, the vacuum time is 420s, and the pressure is-100kPa; the upper chamber is in an inflation state, the inflation lamination pressure is-85kPa, the lower chamber is in a vacuum state, the pressure is-100kPa, and the first lamination time is 30s; then the pressure of the upper chamber is adjusted to-50kPa, the lower chamber is in a vacuum state, the pressure is-100kPa, and the second lamination time is 30s; then the pressure of the upper chamber is adjusted to-30kPa, the lower chamber is in a vacuum state, the pressure is-100kPa, and the third lamination time is 420s; finally, both the upper chamber and the lower chamber are in an inflation state, and the time is 30s;

[0080] S3, removing the upper and lower glass cover plates and the polytetrafluoroethylene cloth on both sides of the adhesive film layer to obtain a standard adhesive film.

[0081] Embodiment 2

[0082] A preparation method of a standard adhesive film comprises:

[0083] S1, placing a standard glass backboard on a stage, laying a glue-resistant release film with a larger surface area than the standard glass backboard on the upper surface of the backboard, cutting the glue film layer to the size corresponding to the laminated structure, and then laying the glue film layer on the glue-resistant release film, and then laminating a layer of glue-resistant release film and a standard glass cover plate on the glue film layer to obtain a laminated structure;

[0084] S2, placing the laminated structure into a laminator for lamination; wherein the lamination temperature is 150°C, both the upper chamber and the lower chamber are in a vacuum state, the vacuum time is 420s, and the pressure is-100kPa; the upper chamber is in an inflation state, the inflation lamination pressure is-85kPa, the lower chamber is in a vacuum state, the pressure is-100kPa, the first lamination time is 30s; then the pressure of the upper chamber is adjusted to-50kPa, the lower chamber is in a vacuum state, the pressure is-100kPa, the second lamination time is 30s; then the pressure of the upper chamber is adjusted to-30kPa, the lower chamber is in a vacuum state, the pressure is-100kPa, the third lamination time is 420s; finally, both the upper chamber and the lower chamber are in an inflation state, and the time is 30s;

[0085] S3, removing the upper and lower glass cover plates and the glue-resistant release films on both sides of the glue film layer to obtain a standard glue film.

[0086] Example 3

[0087] A preparation method of a photovoltaic module for testing, comprising:

[0088] S1, using the standard glue film prepared in Example 1 and a battery array to be tested to form a laminated assembly, comprising: placing a standard backboard on a stage, and sequentially laying the cut standard glue film, the battery array to be tested, the standard glue film, and the standard cover plate;

[0089] S2, placing the laminated assembly into a laminator for lamination to obtain a laminated structure with an integrated structure; wherein the lamination temperature is room temperature, the upper chamber and the lower chamber are in a vacuum state, the pressure is-30kPa, and the vacuum time is 60s; the upper chamber is in an inflation state, the pressure is-10kPa, the lower chamber is in a vacuum state, the pressure is-30kPa, and the lamination time is 500s; finally, both the upper chamber and the lower chamber are in an inflation state, and the time is 20s;

[0090] S3, installing a splicing frame around the laminated structure, and injecting a sealing liquid into the gap between the splicing frame and the laminated structure to form a sealing layer after drying;

[0091] S4, using a splicing assembly on the splicing frame to splice multiple laminated structures into a laminated structure as a whole; wherein the splicing assembly comprises a socket provided on one side of the splicing frame and a socket provided on the other side of the splicing frame;

[0092] S5, mounting a sealing member outside the whole laminated assembly, mounting an outer frame and an interlocking member outside the sealing member, and using the interlocking member to fixedly connect the outer frame and the whole laminated assembly into one body, to obtain a photovoltaic assembly for testing.

[0093] Example 4

[0094] A preparation method of a photovoltaic assembly for testing, comprising:

[0095] S1, using the standard adhesive film prepared in Example 1 and a to-be-tested cover plate to form a laminated assembly, comprising: placing a standard back plate on a stage, and sequentially laying a cut standard adhesive film, a standard cell array, a standard adhesive film, and a to-be-tested cover plate;

[0096] S2, placing the laminated assembly into a laminator to perform lamination, to obtain a laminated assembly with an integrated structure; wherein the lamination temperature is room temperature, the upper chamber and the lower chamber are in a vacuum state, the pressure is-30 kPa, and the vacuum time is 60 s; the upper chamber is in a gas charging state, the pressure is-10 kPa, the lower chamber is in a vacuum state, the pressure is-30 kPa, and the lamination time is 500 s; finally, the upper chamber and the lower chamber are in a gas charging state, and the time is 20 s;

[0097] S3, placing a sealing layer around the laminated assembly, and mounting a splicing frame outside the sealing layer to sandwich the sealing layer between the splicing frame and the laminated assembly;

[0098] S4, using a splicing assembly on the splicing frame to splice a plurality of laminated assemblies into a whole laminated assembly; wherein the splicing assembly comprises a slot arranged on one side of the splicing frame and a socket arranged on the other side of the splicing frame;

[0099] S5, mounting a sealing member outside the whole laminated assembly, mounting an outer frame and an interlocking member outside the sealing member, and using the interlocking member to fixedly connect the outer frame and the whole laminated assembly into one body, to obtain a photovoltaic assembly for testing

[0100] Comparative Example 1 (a component for testing in the prior art)

[0101] A preparation method of a photovoltaic assembly for testing, comprising:

[0102] S1, sequentially laminating and placing a back plate, a rear adhesive film, a to-be-tested cell array, a front adhesive film, and a back plate from bottom to top, to obtain a laminated assembly;

[0103] S2, placing the laminated assembly into a laminator to perform lamination, to obtain a laminated assembly with an integrated structure;

[0104] S3, mounting a sealing member outside the laminated assembly, and mounting an outer frame outside the sealing member, to obtain a photovoltaic assembly for testing.

[0105] The photovoltaic modules prepared in the above Examples 3 and 4 and Comparative Example 1 are tested for performance, and the electrical performance test results are as follows:

[0106] Type P MPP (W)]]> I sc (A)]]> U oc (V)]]> I MPP (A)]]> U MPP (V)]]> FF (%) [R s (Ω)]]> [R sh (Ω)]]> Example 3 541.5 13.80 49.15 13.14 41.21 79.84 0.14 2311 Example 4 541.3 13.82 49.00 13.10 41.16 79.76 0.14 2311 Comparative Example 1 535.1 13.86 48.89 13.04 41.05 79.00 0.16 2310

[0107] From the above test results, it can be seen that the photovoltaic module for testing provided in the embodiments of the present application has a slightly higher current compared to the photovoltaic module of the prior art, which is possibly caused by the increased reflection light due to the large distance between the cell pieces of the cell array, and the slightly higher series resistance, the slightly reduced voltage and the slightly reduced fill factor caused by the increased distance between the cell pieces and the extended solder strip. However, the overall test results of the photovoltaic module are within a reasonable range, and meet the test requirements of the photovoltaic module.

[0108] The above steps are provided for the purpose of helping to understand the structure, method and core idea of the present application. For those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in many ways, and these improvements and modifications also belong to the protection scope of the present application.

Claims

1. A photovoltaic module for testing, characterized in that The application relates to a photovoltaic module, comprising: a plurality of laminated components (1) and a splicing frame (2) arranged at the periphery of the laminated components (1); wherein the laminated components (1) are assembled by a to-be-tested component and a plurality of independent standard components matched with the to-be-tested component; the standard components comprise at least one of a standard cover plate, a standard adhesive film, a standard battery array and a standard back plate; the to-be-tested component is one of a to-be-tested cover plate, a to-be-tested battery array and a to-be-tested back plate; wherein each two adjacent laminated components (1) are spliced into a laminated component whole through the splicing frame (2).

2. The photovoltaic module according to claim 1, wherein each two adjacent laminated components (1) are spliced through at least one set of splicing components (21) between the splicing frames (2) of the laminated components (1).

3. The photovoltaic module according to claim 2, wherein the splicing components (21) comprise a slot (211) arranged on one of the splicing frames (2) and a socket (212) arranged on the other splicing frame (2) and matched with the slot (211); wherein the position of the slot (211) corresponds to the position of a first solder strip in the adjacent laminated component (1) and is used for placing the first solder strip.

4. The photovoltaic module according to claim 3, wherein a first solder strip through hole is arranged on the side of the slot (211) adjacent to the splicing frame (2) and is used for placing the first solder strip; a conductive part (213) corresponding to the first solder strip through hole is arranged on the side of the slot (211) adjacent to the socket (212); wherein the inside of the conductive part (213) is a hollow structure; after the first solder strip is placed into the first solder strip through hole of the slot (211), the first solder strip is located in the hollow structure of the conductive part (213) so that the first solder strip is electrically connected with the conductive part (213).

5. The photovoltaic module according to claim 4, wherein a second solder strip through hole (214) is arranged on the socket (212) and is used for placing a second solder strip in the laminated component (1) adjacent to the socket (212); wherein the second solder strip through hole (214) is arranged in a penetrating mode and corresponds to the position of the conductive part (213); after one of the slots (211) and one of the sockets (212) are spliced, the conductive part (213) on the slot (211) is inserted into the second solder strip through hole (214) on the socket (212) and is electrically connected with the second solder strip located in the second solder strip through hole (214).

6. The photovoltaic module according to claim 5, wherein the slot (211) further comprises a plurality of concave structures (215) on one side of the conductive part (213) and a plurality of insertion bodies (216) on the side opposite to the concave structures (215); the socket (212) further comprises a plurality of convex structures (217) matched with the concave structures (215) and a plurality of insertion grooves (218) matched with the insertion bodies (216).

7. The photovoltaic module of claim 1, wherein, The application further relates to a photovoltaic module, comprising: A plurality of outer frames (3) are arranged around the whole of the laminated member, and an interlocking member (4) is arranged at the joint of each two adjacent outer frames (3); Both ends of the interlocking member (4) are connected with two adjacent outer frames (3) respectively, so as to connect the two adjacent outer frames (3) integrally.

8. The photovoltaic module according to claim 7, wherein, One or more interlocking holes (31) are arranged on the outer frame (3), An interlocking wing (41) matching the interlocking hole (31) is arranged on the interlocking member (4); Each interlocking member (4) is connected with two adjacent outer frames (3) respectively through the interlocking wing (41) and the interlocking hole (31).

9. The photovoltaic module according to claim 8, wherein, The interlocking member (4) is in L-shaped structure; A plurality of interlocking wings (41) are arranged on both sides of the L-shaped structure respectively; wherein, the interlocking wings (41) on different sides are connected with different outer frames (3) respectively.

10. The photovoltaic module according to claim 1, wherein, A sealing layer is further arranged between the laminated member (1) and the splicing frame (2).

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