Preparation method of concentrating photovoltaic module and concentrating photovoltaic module

Abstract

The preparation method comprises the steps that a bottom plate, a side plate assembly, a lens set top plate and a plurality of battery strips are prepared, the side plate assembly comprises side plates and stand columns, the lens set top plate comprises lenses, and the battery strips comprise circuit board strips and single battery modules; the stand column is supported between the bottom plate and the lens group top plate, so that the bottom plate and the lens group top plate are oppositely arranged; placing the battery strips between the bottom plate and the top plate of the lens group, arranging the battery strips at intervals, adjusting the positions of the battery strips until the single battery modules and the lenses on the battery strips are arranged in a one-to-one correspondence manner, and respectively fixing the battery strips on the bottom plate; the circuit board strips of the battery strips are electrically connected through conductive circuits and are led out of the bottom plate; and installing a side plate to obtain the concentrating photovoltaic module. The photoelectric conversion efficiency of the concentrating photovoltaic module prepared by the invention is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a preparation method of a concentrating photovoltaic assembly and a concentrating photovoltaic assembly. Background Art

[0002] With the growing demand for clean energy, photovoltaic technology, with its low-carbon and environmentally friendly characteristics, has become a highly sought-after technology in the power generation sector. However, current photovoltaic technology faces two major limitations: low efficiency and high cost, which seriously restrict its large-scale promotion and application.

[0003] Concentrating photovoltaic technology achieves efficient photoelectric conversion by using relatively low-cost concentrating optical elements to focus sunlight onto a smaller photovoltaic cell. Specifically, concentrating photovoltaic technology utilizes a Fresnel lens array to focus sunlight onto the surface of a gallium arsenide cell array with high photoelectric conversion efficiency, achieving efficient power generation with the help of small cells. However, in actual applications, concentrating photovoltaic technology suffers from the problem of misalignment between the cell and the center of the Fresnel lens. This prevents sunlight from fully irradiating the cell surface, resulting in reduced photoelectric conversion efficiency and failure to fully utilize the advantages of this technology. Summary of the Invention

[0004] In view of this, the present invention provides a method for preparing a concentrating photovoltaic assembly and a concentrating photovoltaic assembly, which are used to solve the problem of easy misalignment between the cell and the center of the Fresnel lens in the prior art concentrating photovoltaic technology.

[0005] To achieve one, part, or all of the above objectives or other objectives, a first aspect of the present invention provides a method for preparing a concentrating photovoltaic module, the method comprising:

[0006] Prepare a bottom plate, a side plate assembly, a lens assembly top plate, and a plurality of battery strips, wherein the side plate assembly includes a plurality of side plates and a plurality of columns, the lens assembly top plate includes a plurality of lenses arranged in an array, and each battery strip includes a circuit board strip and a plurality of single battery modules arranged on the circuit board strip;

[0007] Supporting a plurality of the upright posts between the bottom plate and the top plate of the lens group so that the bottom plate and the top plate of the lens group are arranged opposite to each other;

[0008] Place a plurality of battery strips between the bottom plate and the top plate of the lens assembly, arrange them in intervals, adjust the position of each battery strip until the single battery modules on the battery strips are opposite to the lenses, and fix each battery strip on the bottom plate;

[0009] The circuit board strips of each battery strip are electrically connected through a conductive circuit and are led out of the bottom plate through the positive lead-out electrode and the negative lead-out electrode connected to the conductive circuit;

[0010] The side panels are installed between the bottom panel and the top panel of the lens group, so that the adjacent side panels are connected to the side surfaces of the columns, and the bottom panel is surrounded. The top panel of the lens group, the side panel assembly and the bottom panel are enclosed to form a closed space to obtain the concentrating photovoltaic assembly.

[0011] Furthermore, the steps of preparing the battery strip include:

[0012] preparing a plurality of single battery modules;

[0013] Prepare a circuit board strip, wherein the circuit board strip comprises a substrate, a first insulating layer, a circuit layer, and a second insulating layer stacked from bottom to top; the circuit layer comprises lead contacts, a plurality of first contact groups, and leads; the first contact groups comprise a first positive contact and a first negative contact; lead contacts are provided at both ends of the circuit layer; a plurality of first contact groups spaced apart are provided in the middle of the circuit layer; adjacent first contact groups are connected by leads; the second insulating layer covers the leads but does not cover the lead contacts and the first contact groups; the length direction of the circuit board strip serves as the y-axis direction of the concentrating photovoltaic module; the distance between the centers of two adjacent first contact groups is equal to the distance between the centers of two adjacent lenses in the y-axis direction of the lens assembly top plate;

[0014] Each of the single battery modules is connected to each of the first contact groups respectively to electrically connect each of the single battery modules with the circuit board strip.

[0015] Furthermore, the step of preparing a plurality of single battery modules includes:

[0016] Prepare a solar cell, a packaging bracket, bonding wires, and packaging glue; wherein the packaging bracket includes a base and a shell surrounding the base, the base of the packaging bracket includes a second contact group, the second contact group includes a second positive electrode contact and a second negative electrode contact, and the second positive electrode contact and the second negative electrode contact are separated and insulated;

[0017] Placing the solar cell on the base of the packaging bracket, electrically connecting the positive electrode of the solar cell to the second positive electrode contact, and electrically connecting the negative electrode of the solar cell to the second negative electrode contact via a bonding wire;

[0018] The packaging glue is filled in the space formed by the base and the shell of the packaging bracket to produce the single battery module.

[0019] Furthermore, the step of connecting each of the single battery modules to each of the first contact groups includes:

[0020] The second positive contact is electrically connected to the first positive contact, and the second negative contact is electrically connected to the first negative contact.

[0021] Furthermore, one end lead-out contact of each circuit layer is a negative lead-out contact, and the other end lead-out contact is a positive lead-out contact.

[0022] The step of placing a plurality of the battery strips between the bottom plate and the top plate of the lens assembly and arranging them in intervals includes:

[0023] Place a plurality of battery strips between the bottom plate and the top plate of the lens assembly, with the negative lead-out contacts of each circuit board strip placed on the same side, and the positive lead-out contacts of each circuit board placed on the same other side;

[0024] Adjusting the x-axis spacing of each circuit board so that the distance between the centers of two adjacent circuit board strips is equal to the distance between the centers of two adjacent lenses in the top plate of the lens assembly in the x-axis direction, where the x-axis direction is perpendicular to the y-axis direction;

[0025] The positions of both ends of each circuit board are adjusted so that the center of each solar cell corresponds vertically to the center of each lens.

[0026] Furthermore, the conductive circuit includes a positive lead between the strips and a negative lead between the strips, and the bottom plate is provided with a positive lead hole and a negative lead hole, the positive lead hole and the negative lead hole are located on opposite sides of the bottom plate, or the positive lead hole and the negative lead hole are located on the same side of the bottom plate;

[0027] The step of electrically connecting the circuit board strips of each battery strip through a conductive circuit and leading the positive lead-out electrode and the negative lead-out electrode connected to the conductive circuit to the outside of the bottom plate includes:

[0028] Connecting the positive lead points of each of the plates through a positive lead wire, and connecting the negative lead points of each of the plates through a negative lead wire;

[0029] Pass one end of the positive lead electrode connected to the positive lead between the strips through the positive lead hole to the outside of the bottom plate;

[0030] One end of the negative lead-out electrode connected to the negative lead between the strips is passed through the negative lead-out hole to the outside of the bottom plate.

[0031] Furthermore, the steps of placing a plurality of battery strips between the bottom plate and the top plate of the lens assembly and arranging them in intervals, adjusting the position of each battery strip until the single battery modules on the battery strips are arranged opposite to the lenses one by one, and fixing each battery strip on the bottom plate respectively include:

[0032] Place a plurality of the battery strips between the bottom plate and the top plate of the lens assembly, and roughly adjust the x-axis spacing so that the distance between the centers of two adjacent circuit strips is equal to the distance between the centers of two adjacent lenses in the top plate of the lens assembly in the x-axis direction, and the x-axis direction is perpendicular to the y-axis direction, and the y-axis direction is the length direction of the circuit strips;

[0033] Coarsely adjust the first single battery module at the first end of each battery strip to align with the bottom of the first lens at one end of the corresponding column in the y-axis direction of the lens assembly top plate;

[0034] Fine-tune the relative position of the first single battery module and the first lens so that the photosensitive center of the first single battery module is vertically aligned with the center of the first lens, and fix the first end of the battery strip;

[0035] Coarsely adjust the last single battery module at the second end of each battery strip to align with the bottom of the last lens at the other end of the corresponding column in the y-axis direction of the lens assembly top plate;

[0036] The relative position of the last battery module and the last lens is fine-tuned so that the photosensitive center of the last battery module is vertically aligned with the center of the last lens, and the second end of the battery strip is fixed.

[0037] Furthermore, the step of fine-tuning the relative position of the first single battery module and the first lens so that the photosensitive center position of the first single battery module is vertically aligned with the center of the first lens and fixing the first end of the battery strip includes:

[0038] Above the first lens, shine a simulated light source downward onto the first single battery module, and record the output current of the first single battery module;

[0039] Fine-tune the position of the first single battery module and continuously record the output current at the corresponding position;

[0040] The maximum value of the output current is determined as the adjustment position of the first single battery module, and when the first single battery module is located at the adjustment position, the first end of the battery strip is fixed to the bottom plate.

[0041] Furthermore, the relative position of the last single battery module and the last lens is finely adjusted so that the photosensitive center position of the last single battery module is vertically aligned with the center of the last lens. The step of fixing the second end of the battery strip includes:

[0042] Above the last lens, shine a simulated light source downward onto the last single battery module, and record the output current of the last single battery module;

[0043] Fine-tuning the position of the last single battery module and continuously recording the output current at the corresponding position;

[0044] The maximum value of the output current is determined as the adjustment position of the last single battery module, and when the last single battery module is located at the adjustment position, the second end of the battery strip is fixed to the bottom plate.

[0045] A second aspect of the present invention provides a concentrating photovoltaic module, which is prepared using the above-mentioned method for preparing a concentrating photovoltaic module.

[0046] Implementing the embodiments of the present invention will have at least the following beneficial effects:

[0047] The present invention provides a method for preparing a concentrating photovoltaic (CPV) assembly and a CPV assembly. By configuring a cell array as a plurality of separate cell strips and adjusting the positions of the strips one by one, the individual cell modules on the strips are aligned with the lenses on the top plate of the lens assembly. This effectively solves the problem of misalignment between the individual cell modules and the center of the lens, ensuring that sunlight reaches the surface of the individual cell modules to the greatest extent possible, thereby improving the photoelectric conversion efficiency of the CPV cells. Furthermore, the individual cell strips do not interfere with each other. Even if a cell module on one strip is misaligned with the lens, this does not affect the alignment of the individual cell modules and lenses on other strips, significantly reducing operational costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] in:

[0050] Figure 1 1 is a schematic flow chart of a method for preparing a concentrating photovoltaic module in one embodiment;

[0051] Figure 2 Schematic diagram of an exploded structure of a concentrated photovoltaic module in one embodiment;

[0052] Figure 3 is a schematic exploded view of the structure of a concentrating photovoltaic assembly in yet another embodiment;

[0053] Figure 4 is a schematic cross-sectional structural diagram of a concentrating photovoltaic module in one embodiment;

[0054] Figure 5 is a schematic diagram of the cross-sectional structure of a battery bar in one embodiment;

[0055] Figure 6 Schematic diagram of a top view of a battery strip in one embodiment;

[0056] Figure 7 A schematic diagram of the wiring of a concentrated photovoltaic module in one embodiment;

[0057] Figure 8 A schematic diagram of wiring of a concentrated photovoltaic module in another embodiment;

[0058] Figure 9 is a schematic cross-sectional structural diagram of a single battery module in one embodiment;

[0059] Figure 10 Schematic diagram of a top view of a single battery module in one embodiment;

[0060] Figure 11 Schematic diagram of a packaging bracket structure of a single battery module in one embodiment;

[0061] Figure 12 Schematic diagram of an operation method for aligning a battery strip with a top plate of a lens assembly in one embodiment.

[0062] Description of the accompanying figures:

[0063] 1: bottom plate; 11: positive electrode lead hole; 12: negative electrode lead hole;

[0064] 2: side panel assembly; 21: side panel; 22: column;

[0065] 3: top plate of lens group; 31: lens; 32: frame;

[0066] 4: Battery bar;

[0067] 41: Circuit board strip; 411: Substrate; 412: First insulating layer; 413: Circuit layer; 4131: First contact group; 4132: Lead; 4133: Negative lead contact; 4134: Positive lead contact; 414: Second insulating layer;

[0068] 42: Single cell module; 421: Solar cell; 422: Base; 423: Housing; 4231: Second positive electrode contact; 4232: Second negative electrode contact; 4233: Insulation; 424: Bonding wire; 425: Encapsulation adhesive;

[0069] 51: positive lead between laths; 52: negative lead between laths;

[0070] 61: positive lead electrode; 62: negative lead electrode. DETAILED DESCRIPTION

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention belongs. The terms used in the description of the invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention. The terms "including" and "having" and any variations thereof in the description and claims of the invention and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the description and claims of the invention and the accompanying drawings are used to distinguish different objects, not to describe a specific order.

[0072] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0074] Reference Figure 1 , an embodiment of the present invention shows a method for preparing a concentrated photovoltaic module, the preparation method comprising:

[0075] S1: Prepare a bottom plate 1, a side plate assembly 2, a lens assembly top plate 3, and a plurality of battery strips 4, wherein the side plate assembly 2 includes a plurality of side plates 21 and a plurality of columns 22, the lens assembly top plate 3 includes a plurality of lenses 31 arranged in an array, and each battery strip 4 includes a circuit strip 41 and a plurality of single battery modules 42 arranged on the circuit strip 41;

[0076] S2: Supporting a plurality of the columns 22 between the bottom plate 1 and the top plate 3 of the lens group, so that the bottom plate 1 and the top plate 3 of the lens group are arranged opposite to each other;

[0077] S3: placing a plurality of battery strips 4 between the bottom plate 1 and the lens assembly top plate 3, adjusting the position of each battery strip 4 until the single battery modules 42 on the battery strips 4 are opposite to the lenses 31, and fixing each battery strip 4 on the bottom plate 1;

[0078] S4: The circuit board strips 41 of the battery strips 4 are electrically connected through conductive circuits and are led out of the bottom plate 1 through the positive lead-out electrode 61 and the negative lead-out electrode 62 connected to the conductive circuits;

[0079] S5: Install the side panel 21 between the bottom panel 1 and the lens group top panel 3, so that the adjacent side panels 21 and the side surfaces of the columns 22 are connected, and surround the bottom panel 1. The lens group top panel 3, the side panel assembly 2 and the bottom panel 1 are enclosed to form a closed space to obtain the concentrating photovoltaic assembly.

[0080] In this embodiment, refer to Figure 2-Figure 4 In step S1 above, during the preparation phase, the base plate 1, side panel assembly 2, lens assembly top plate 3, and several battery strips 4 are fabricated separately. The side panel assembly 2 can be made of lightweight yet strong materials such as aluminum alloy, stainless steel, carbon steel, carbon fiber, or plastic. The base plate 1 can be made of metal, glass, or glass fiber reinforced plastic. The lens assembly top plate 3 includes a Fresnel lens assembly for efficient light focusing. By dividing the curved surface of a traditional lens into a series of concentric annular ridges, the Fresnel lens significantly reduces material usage and lens 31 thickness while maintaining the focusing effect. This offers the advantages of lightweight and low cost. The lenses 31 in the Fresnel lens assembly are arranged in an array. Sunlight incident on the surface of the Fresnel lens is refracted by the ridges, concentrating the light. The lenses 31 focus a large area of sunlight onto the surface of the corresponding smaller single cell module 42 (e.g., a gallium arsenide cell) below. This creates a light spot with a higher energy density on the surface of the single cell module 42, improving its photoelectric conversion efficiency. In some embodiments, the lens group top plate 3 also includes a frame 32 arranged on the side of the Fresnel lens group 31 and facing downward. The shape of the frame 32 matches the side panel assembly 2. By aligning the frame 32 with the column 22, the combination of the lens group top plate 3 and the bottom plate 1 is achieved.

[0081] During the manufacturing process of the battery strip 4, the circuit board strip 41 and the single battery module 42 are prepared separately, and then a plurality of single battery modules 42 are arranged on the circuit board strip 41 in a predetermined order. The single battery module 42 is preferably a gallium arsenide battery.

[0082] In step S2, several prepared columns 22 are placed vertically on the base plate 1 according to a pre-designed distribution. The lens assembly top plate 3 is then placed on top of the columns 22, so that the base plate 1 and the lens assembly top plate 3 are parallel and opposite to each other. For a rectangular base plate 1, the columns 22 are preferably placed at the four corners of the base plate 1, and the columns 22 are arranged in an L shape to match the corners.

[0083] In step S3, several prefabricated battery strips 4 are sequentially placed between the base plate 1 and the lens assembly top plate 3, arranged at regular intervals. During this arrangement, the positions of the battery strips 4 are adjusted, and detection equipment is used to ensure precise alignment between the individual battery modules 42 and the lenses 31. The battery strips 4 are then secured to the base plate 1 using welding, bonding, or other methods. This ensures precise alignment between the battery strips 4 and the lenses 31, ensuring that sunlight is accurately focused onto the individual battery modules 42 and improving photoelectric conversion efficiency.

[0084] In step S4, the circuit board strips 41 of each battery strip 4 are electrically connected using conductive traces (e.g., wires, conductive tape, FPC, etc.), forming a complete circuit system based on the series or parallel circuit design requirements. After the connections are complete, the positive and negative lead electrodes 61 and 62 are welded to the conductive traces and then extended to the outside of the base plate 1 for connection to an external circuit.

[0085] In step S5, the side panels 21 are sequentially installed between the bottom panel 1 and the lens assembly top panel 3, so that adjacent side panels 21 are tightly connected to the sides of the columns 22. Sealant is then filled into the gaps between the side panels 21, columns 22, and the lens assembly top panel 3, and finally the bottom panel 1 is enclosed to form a closed space, completing the preparation of the concentrated photovoltaic module.

[0086] This embodiment configures the battery array into several separate battery strips 4, adjusting the position of each battery strip 4 one by one to align the individual battery modules 42 on the battery strips 4 with the Fresnel lens (lens 31 on the lens assembly top plate 3). This effectively solves the problem of easy misalignment between the center of the individual battery modules 42 and the lens 31, ensuring that sunlight can reach the surface of the individual battery modules 42 to the greatest extent possible, thereby improving the photoelectric conversion efficiency of the concentrating photovoltaic cell. Moreover, the individual battery strips 4 of this embodiment do not interfere with each other. Even if the individual battery module 42 on one battery strip 4 is misaligned with the lens 31, it will not affect the alignment of the individual battery modules 42 and the lens 31 of other battery strips 4. Even if a single battery strip 4 fails, maintenance can be performed by replacing the single battery strip 4, greatly reducing the cost of use.

[0087] In a specific embodiment, the step S1 of preparing the battery strip 4 includes:

[0088] S101: preparing a plurality of single battery modules 42;

[0089] S102: Prepare a circuit board strip 41, wherein the circuit board strip 41 includes a substrate 411, a first insulating layer 412, a circuit layer 413, and a second insulating layer 414 stacked from bottom to top, the circuit layer 413 including a lead-out contact, a plurality of first contact groups 4131, and a lead 4132, the first contact group 4131 including a first positive contact and a first negative contact, lead-out contacts are provided at both ends of the circuit layer 413, a plurality of first contact groups 4131 spaced apart are provided in the middle of the circuit layer 413, and adjacent first contact groups 4131 are connected by lead 4132; the second insulating layer 414 covers the lead 4132, but does not cover the lead-out contact and the first contact group 4131; the length direction of the circuit board strip 41 is used as the y-axis direction of the concentrating photovoltaic module, and the distance between the centers of two adjacent first contact groups 4131 is equal to the distance between the centers of two adjacent lenses 31 in the y-axis direction of the lens group top plate 3;

[0090] S103 : Connecting each of the single battery modules 42 to each of the first contact groups 4131 respectively, so as to electrically connect each of the single battery modules 42 with the circuit board strip 41 .

[0091] In this embodiment, there is no special order restriction for executing the above-mentioned step S101 and step S102, and they can be processed separately and simultaneously to improve production efficiency.

[0092] Reference Figure 5-Figure 6 In the above step S102, suitable materials for the substrate 411 and the first / second insulating layer 414 are selected. For example, the substrate 411 material includes epoxy resin glass fiber board, and the insulating layer material includes polyimide, epoxy resin, etc. Conventional processes are used to stack the substrate 411 and the first insulating layer 412. Then, lead contacts, the first contact group 4131, and the leads 4132 are formed on the first insulating layer 412 according to the predetermined design circuit through processes such as photolithography and electroplating. Finally, the second insulating layer 414 is covered on the surface of the leads 4132 through processes such as coating and curing. The second insulating layer 414 is made of the same or similar material as the first insulating layer 412 to ensure that the lead contacts and the first contact group 4131 are exposed to facilitate subsequent electrical connection with other components. The embodiment of the present invention does not specifically limit the thickness and width of the above layers. Those skilled in the art can make their own choices based on the specific product characteristics.

[0093] In the above step S103 , the prepared single cell modules 42 are sequentially placed on the corresponding first contact groups 4131 , and the electrodes of the single cell modules 42 are connected to the first contact groups 4131 of the circuit strips 41 , thereby achieving electrical connectivity between the single cell modules 42 and the circuit strips 41 .

[0094] Compared with the existing technology of laying out the circuit layer on the entire base plate 1, this embodiment adopts a battery strip 4, whose insulation layer has a small laying area, saving raw materials; the difficulty of laying the circuit layer 413 is lower than that on the entire base plate, and only one-dimensional wiring is required, with high precision; the width of the circuit board strip 41 only needs to be greater than the width of the single battery module 42, and the cost is low; the base plate 1 below the battery strip 4 can be made of glass or other materials (the existing technology requires the use of a whole metal base plate), which greatly reduces the weight and cost of the concentrated photovoltaic module.

[0095] In a specific embodiment, referring to Figures 9-11 The step S101 of preparing a plurality of single battery modules 42 includes:

[0096] S1011: Prepare solar cells 421, a packaging bracket, bonding wires 424, and packaging glue 525; wherein the packaging bracket includes a base 422 and a shell 423 surrounding the base 422; the base 422 of the packaging bracket includes a second contact group, and the second contact group includes a second positive contact 4231 and a second negative contact 4232; the second positive contact 4231 and the second negative contact 4232 are spaced and insulated;

[0097] S1012: placing the solar cell 421 on the base 422 of the packaging bracket, electrically connecting the positive electrode of the solar cell 421 to the second positive electrode contact 4231 , and electrically connecting the negative electrode of the solar cell 421 to the second negative electrode contact 4232 via a bonding wire 424 ;

[0098] S1013 : Filling the packaging glue 525 into the space formed by the base 422 and the outer shell 423 of the packaging bracket to obtain the single battery module 42 .

[0099] In this embodiment, the optional types of solar cells 421 include gallium arsenide solar cells, cadmium telluride solar cells or silicon-based solar cells. Figure 11 , including a base 422 and an insulating shell 423 surrounding the base 422, the base 422 of the packaging bracket includes a second contact group, the second contact group includes a second positive contact 4231 and a second negative contact 4232, and the second positive contact 4231 and the second negative contact 4232 are spaced and insulated. The bonding wire 424 has good conductivity and flexibility, such as a conductive metal wire. The packaging glue 525 can be selected from the existing technology with high light transmittance (preferably a light transmittance greater than 92%), strong insulation, good mechanical strength and weather resistance. The packaging glue, such as epoxy resin glue, silicone, etc., can reduce light loss and protect the electrical connection between the bonding wire 424 and the negative contact.

[0100] In step S1012, the positive electrode of the solar cell 421 is electrically connected to the second positive electrode contact 4231 of the package support using silver glue die bonding technology / solder paste reflow technology. The negative electrode of the solar cell 421 is electrically connected to the second negative electrode contact 4232 of the package support via a bonding wire 424. By connecting the positive and negative electrodes of the solar cell 421 to the second contact group, the second contact group is further electrically connected to the circuit board 41, thereby achieving electrical connection between the single cell module 42 and the circuit board 41.

[0101] In step S1013, the insulating housing 423 of the packaging bracket and the base 422 enclose a cavity. After the positive and negative electrodes of the solar cell 421 are electrically connected to the second contact group, encapsulation adhesive 525 is applied to the cavity, ensuring that the encapsulation adhesive 525 fills the entire cavity and smoothes the surface. The encapsulation adhesive 525 is cured according to its curing process requirements to form a sealed single cell module 42.

[0102] The single cell module 42 manufactured in this embodiment can provide targeted packaging and protection for the solar cells 421 and each contact, thereby improving the weather resistance and service life of the cell module; the packaging glue 525 only needs to be filled in the cavity of the packaging bracket, which can save the amount of packaging glue 525 and reduce the production cost of the concentrated photovoltaic cell.

[0103] In a specific embodiment, the step S103 of connecting each of the single battery modules 42 to each of the first contact points 4131 includes:

[0104] S1031: electrically connecting the second positive electrode contact 4231 to the first positive electrode contact, and electrically connecting the second negative electrode contact 4232 to the first negative electrode contact.

[0105] In this embodiment, welding, conductive adhesive bonding, or other methods are used to electrically connect the second positive electrode contact 4231 on the packaging bracket base 422 of the single battery module 42 to the first positive electrode contact in the first contact group 4131 of the circuit board strip 41. Simultaneously, the second negative electrode contact 4232 is correspondingly connected to the first negative electrode contact. Specific welding or bonding techniques can be adjusted by those skilled in the art based on existing technologies according to specific product requirements, and are not detailed herein.

[0106] In a specific embodiment, referring to Figure 7-Figure 8 One end lead contact of each circuit layer 413 is a negative lead contact 4133, and the other end lead contact is a positive lead contact 4134.

[0107] The step S3 of placing a plurality of the battery strips 4 between the bottom plate 1 and the lens assembly top plate 3 and arranging them in intervals includes:

[0108] S301: Place a plurality of battery strips 4 between the bottom plate 1 and the lens assembly top plate 3, with the negative lead-out contacts 4133 of each circuit board strip 41 on the same side and the positive lead-out contacts 4134 of each circuit board strip 41 on the same other side;

[0109] S302: Adjusting the x-axis spacing of the circuit strips 41 so that the distance between the centers of two adjacent circuit strips 41 is equal to the distance between the centers of two adjacent lenses 31 in the lens assembly top plate 3 in the x-axis direction, where the x-axis direction is perpendicular to the y-axis direction;

[0110] S303 : Adjusting the positions of both ends of each circuit board strip 41 so that the center of each solar cell 421 is vertically aligned with the center of each lens 31 .

[0111] In this embodiment, when placing several battery strips 4 between the base plate 1 and the lens assembly top plate 3, all battery strips 4 are placed in a uniform orientation, with the negative lead contacts 4133 of each circuit board strip 41 on the same side and the positive lead contacts 4134 on the other side. This facilitates parallel connection of the circuit boards 41 in subsequent steps. Initially, the spacing of the circuit boards 41 in the x-axis direction is preliminarily adjusted. Specifically, this can be done based on pre-set positioning markers. The positions of the ends of each circuit board strip 41 are then precisely adjusted. Using alignment equipment, the relative position of the center of each solar cell 421 and the center of each lens 31 is monitored in real time. The circuit boards 41 are then precisely moved within the xy plane to ensure that the center of each solar cell 421 is perpendicularly aligned with the center of each lens 31. This ensures that sunlight strikes the surface of each solar cell 421 vertically and accurately, maximizing the light concentration effect and photoelectric conversion efficiency.

[0112] In a specific embodiment, referring to Figure 7-Figure 8 The conductive circuit includes a positive lead 51 between the strips and a negative lead 52 between the strips. The bottom plate 1 is provided with a positive lead-out hole 11 and a negative lead-out hole 12. The positive lead-out hole 11 and the negative lead-out hole 12 are located on opposite sides of the bottom plate 1, or the positive lead-out hole 11 and the negative lead-out hole 12 are located on the same side of the bottom plate 1.

[0113] The step S4 of electrically connecting the circuit board strips 41 of each battery strip 4 through a conductive circuit and leading the positive lead-out electrode 61 and the negative lead-out electrode 62 connected to the conductive circuit to the outside of the bottom plate 1 includes:

[0114] S401: Connecting the positive electrode lead points 4134 between the slats through the positive electrode lead wires 51, and connecting the negative electrode lead points 4133 between the slats through the negative electrode lead wires 52;

[0115] S402: Pass one end of the positive lead electrode 61 connected to the inter-slat positive lead 51 through the positive lead hole 11 to the outside of the bottom plate 1;

[0116] S403 : Pass one end of the negative lead electrode 62 connected to the inter-slat negative lead 52 through the negative lead hole 12 to the outside of the bottom plate 1 .

[0117] In this embodiment, for the case where the negative lead-out contacts 4133 of each circuit strip 41 are located on the same side and the positive lead-out contacts 4134 are located on the same other side, a straight positive lead 51 between the strips can be used to weld each positive lead-out contact 4134, and a straight negative lead 52 between the strips can be used to weld each negative lead-out contact 4133, so as to construct a complete and easy-to-wire parallel circuit.

[0118] After completing the electrical connection of each battery strip 4, one end of the positive lead electrode 61 is welded to the inter-strip positive lead 51. The other end of the positive lead electrode 61 is then passed through the positive lead hole 11 pre-set in the base plate 1 until one end of the positive lead electrode 61 extends outside the base plate 1 to connect to the external circuit. The installation and extraction methods for the negative lead electrode 62 are similar to those for the positive lead electrode and will not be further described in this embodiment.

[0119] like Figure 7 As shown, in a specific embodiment, the positive lead electrode 61 and the negative lead electrode 62 of the concentrating photovoltaic module are close to each other, and holes located on the same side are opened at corresponding positions of the bottom plate 1, and a junction box can be connected later. Figure 8 As shown, in another specific embodiment, the positive lead electrode 61 and the negative lead electrode 62 of the concentrating photovoltaic module are separated from each other, and holes on opposite sides are opened at corresponding positions of the base plate 1. A split junction box needs to be installed later, but the length of the positive lead electrode 61 and the negative lead electrode 62 can be reduced, the impedance can be reduced, and the failure rate can be reduced.

[0120] In a specific embodiment, the step S3 of placing a plurality of battery strips 4 between the bottom plate 1 and the top plate 3 of the lens assembly and arranging them in intervals, adjusting the position of each battery strip 4 until the single battery modules 42 on the battery strips 4 are arranged one by one opposite to the lenses 31, and fixing each battery strip 4 on the bottom plate 1 includes:

[0121] S311: Place a plurality of the battery strips 4 between the bottom plate 1 and the lens assembly top plate 3, and roughly adjust the x-axis spacing so that the distance between the centers of two adjacent circuit strips 41 is equal to the distance between the centers of two adjacent lenses 31 in the lens assembly top plate 3 in the x-axis direction, and the x-axis direction is perpendicular to the y-axis direction, and the y-axis direction is the length direction of the circuit strips 41;

[0122] S312: Coarsely adjust the first single battery module at the first end of each battery strip 4 to align with the bottom of the first lens at one end of the corresponding column in the y-axis direction of the lens assembly top plate 3;

[0123] S313: Finely adjust the relative position of the first single battery module and the first lens so that the photosensitive center of the first single battery module is vertically aligned with the center of the first lens, and fix the first end of the battery strip 4;

[0124] S314: coarsely adjust the last single battery module at the second end of each battery strip 4 to align with the bottom of the last lens at the other end of the corresponding column in the y-axis direction of the lens assembly top plate 3;

[0125] S315: fine-tuning the relative position of the last battery module and the last lens so that the photosensitive center of the last battery module is vertically aligned with the center of the last lens, and fixing the second end of the battery strip 4.

[0126] In this embodiment, in the above step S311, coarse adjustment can be performed by aligning with a pre-set positioning mark, or measuring with a measuring tool. After determining the position of the edge circuit strip 41, each circuit strip 41 is measured and placed in sequence according to a pre-determined spacing, so that the distance between the centers of two adjacent circuit strips 41 is approximately equal to the distance between the centers of two adjacent lenses 31 in the x-axis direction of the lens group top plate 3.

[0127] The above steps S312 - S313 achieve precise positioning of the first end of the circuit board strip 41 .

[0128] Specifically, refer to Figure 12 The step S313 of fine-tuning the relative position of the first single battery module and the first lens so that the photosensitive center position of the first single battery module is vertically aligned with the center of the first lens and fixing the first end of the battery strip 4 includes:

[0129] S3131: Projecting a simulated light source downward onto the first single battery module from above the first lens 31, and recording the output current of the first single battery module;

[0130] S3132: Fine-adjust the position of the first single battery module and continuously record the output current at the corresponding position;

[0131] S3133 : Determine the maximum value of the output current as the adjustment position of the first single battery module, and when the first single battery module is located at the adjustment position, fix the first end of the battery strip 4 on the bottom plate 1 .

[0132] In this embodiment, the simulated light source can be an LED light source array with spectral characteristics close to sunlight. The simulated light source is installed at a suitable height position directly above the first lens, and the light emitted by the simulated light source can evenly cover the first lens. When the simulated light source is turned on, the first single cell module receives the light and generates current. The output current value of the first single cell module at the current position is recorded in real time by a current measuring device (such as an ammeter, a data collector, etc.) connected to the circuit of the first single cell module. The position of the first single cell module is slightly adjusted horizontally, and the current measuring device continuously records the output current value of the first single cell module at the new position, thereby forming a set of position-current data sets, and finding the maximum current value therein. The position of the first single cell module corresponding to the maximum output current is determined as the optimal adjustment position. When the first single cell module is in this adjustment position, a fixing device (such as screws, clips, glue, etc.) is used to fix the first end of the battery strip 4 to the base plate 1.

[0133] The above steps S314 - S315 achieve precise positioning of the second end of the circuit board strip 41 .

[0134] In a specific embodiment, referring to Figure 12 , fine-tuning the relative position of the last single battery module and the last lens so that the photosensitive center position of the last single battery module is vertically aligned with the center of the last lens, and fixing the second end of the battery strip 4 in step S315, including:

[0135] S3151: shine a simulated light source downward onto the last single battery module above the last lens, and record the output current of the last single battery module;

[0136] S3152: Fine-tune the position of the last single battery module and continuously record the output current at the corresponding position;

[0137] S3153 : Determine the maximum value of the output current as the adjustment position of the last single battery module, and when the last single battery module is located at the adjustment position, fix the second end of the battery strip 4 on the bottom plate 1 .

[0138] In this embodiment, the precise positioning method for the second end of the battery strip 4 is substantially the same as the precise positioning method for the first end of the battery strip 4 in the aforementioned embodiment, and the specific process will not be described in detail in this embodiment.

[0139] Reference Figure 2-Figure 11, an embodiment of the present invention provides a concentrating photovoltaic assembly, which is prepared using the preparation method of the concentrating photovoltaic assembly of any of the aforementioned embodiments.

[0140] A concentrating photovoltaic assembly, characterized by comprising a bottom plate 1, a side plate assembly 2, a lens assembly top plate 3, and a plurality of battery strips 4;

[0141] The lens assembly top plate 3, the side plate assembly 2 and the bottom plate 1 enclose a closed space, and a plurality of battery strips 4 are located in the closed space, and the battery strips 4 are arranged on the bottom plate 1 at intervals;

[0142] The lens group top plate 3 includes a plurality of lenses 31 arranged in an array, and each of the battery strips 4 includes a circuit board strip 41 and a plurality of single battery modules 42 arranged on the circuit board strip 41; the circuit board strips 41 of each of the battery strips 4 are electrically connected through conductive circuits, and are led out of the enclosed space through the positive lead-out electrode 61 and the negative lead-out electrode 62 connected to the conductive circuit; the lenses 31 and the single battery modules 42 are arranged one by one opposite to each other.

[0143] In a specific embodiment, the circuit strip 41 includes a substrate 411, a first insulating layer 412, a circuit layer 413, and a second insulating layer 414 stacked from bottom to top. The circuit layer 413 includes a lead-out contact, a plurality of first contact groups 4131, and a lead 4132. The first contact group 4131 includes a first positive contact and a first negative contact. Lead-out contacts are provided at both ends of the circuit layer 413. A plurality of first contact groups 4131 spaced apart are provided in the middle of the circuit layer 413. Adjacent first contact groups 4131 are connected by lead 4132. 32 connection; the second insulating layer 414 covers the lead 4132, but does not cover the lead-out contact and the first contact group 4131, and each of the single cell modules 42 is respectively connected to each of the first contact groups 4131, so as to realize the electrical connection between each of the single cell modules 42 and the circuit board strip 41; the length direction of the circuit board strip 41 is used as the y-axis direction of the concentrating photovoltaic assembly, and the distance between the centers of two adjacent first contact groups 4131 is equal to the distance between the centers of two adjacent lenses 31 in the y-axis direction of the lens group top plate 3.

[0144] In a specific embodiment, one end lead-out contact of each circuit layer 413 is a negative lead-out contact 4133, and the other end lead-out contact is a positive lead-out contact 4134. The circuit strips 41 are arranged side by side and spaced apart, and the negative lead-out contacts 4133 of each circuit strip 41 are located on the same side, and the positive lead-out contacts 4134 of each circuit strip 41 are located on the same other side. The conductive circuit includes a positive lead 51 between the strips and a negative lead 52 between the strips. The positive lead 51 between the strips is used to connect each of the positive lead-out contacts 4134, and the negative lead 52 between the strips is used to connect each of the negative lead 4133. The distance between the centers of two adjacent strips is equal to the distance between the centers of two adjacent lenses 31 in the x-axis direction of the lens group top plate 3, and the x-axis direction is perpendicular to the y-axis direction.

[0145] In a specific embodiment, the single cell module 42 includes a solar cell 421, a packaging bracket, a bonding wire 424 and a packaging glue 525, the packaging bracket includes a base 422 and a shell 423 surrounding the base 422, the base 422 of the packaging bracket includes a second contact group, the second contact group includes a second positive contact 4231 and a second negative contact 4232, an insulating portion 4233 is provided between the second positive contact 4231 and the second negative contact 4232, the solar cell 421 includes a first terminal 4231, a second terminal 4232, and a second terminal 4233 is provided between the second positive contact 4231 and the second negative contact 4232. The battery 421 is arranged on the base 422 of the packaging bracket, and the positive electrode of the solar cell 421 is electrically connected to the second positive electrode contact 4231, and the negative electrode of the solar cell 421 is electrically connected to the second negative electrode contact 4232 via a bonding wire 424. The packaging glue 525 is filled in the space formed by the base 422 of the packaging bracket and the shell 423; the second positive electrode contact 4231 is electrically connected to the first positive electrode contact, and the second negative electrode contact 4232 is electrically connected to the first negative electrode contact.

[0146] In a specific embodiment, the center of each solar cell 421 corresponds vertically to the center of each lens 31 one by one.

[0147] In a specific embodiment, the side panel assembly 2 includes a plurality of side panels 21 and a plurality of columns 22, and the sides of adjacent side panels 21 and columns 22 are connected to surround the base plate 1; the side panels 21 of the side panel assembly 2 are respectively arranged on each side of the base plate 1, and the columns 22 are respectively arranged at each top corner of the base plate 1; the lens group top plate 3 includes a frame 32 arranged on the peripheral side, and the shape of the frame 32 matches the side panel assembly 2. By aligning the frame 32 with the columns 22, the combination of the lens group top plate 3 and the base plate 1 is achieved; the gap between the side panel assembly 2 and the frame 32 is filled with sealant.

[0148] In a specific embodiment, the bottom plate 1 is provided with a positive electrode lead-out hole 11 and a negative electrode lead-out hole 12, one end of the positive electrode lead-out electrode 61 passes through the positive electrode lead-out hole 11 to the outside of the enclosed space, and one end of the negative electrode lead-out electrode 62 passes through the negative electrode lead-out hole 12 to the outside of the enclosed space; the positive electrode lead-out hole 11 and the negative electrode lead-out hole 12 are located on opposite sides of the bottom plate 1, or the positive electrode lead-out hole 11 and the negative electrode lead-out hole 12 are located on the same side of the bottom plate 1.

[0149] In a specific embodiment, both ends of the battery strip 4 are fixed to the bottom plate 1 .

[0150] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A method for preparing a concentrated photovoltaic module, characterized in that: The preparation method comprises: Prepare a bottom plate, a side plate assembly, a lens assembly top plate, and a plurality of battery strips, wherein the side plate assembly includes a plurality of side plates and a plurality of columns, the lens assembly top plate includes a plurality of lenses arranged in an array, and each battery strip includes a circuit board strip and a plurality of single battery modules arranged on the circuit board strip; Supporting a plurality of the upright posts between the bottom plate and the top plate of the lens group so that the bottom plate and the top plate of the lens group are arranged opposite to each other; Place a plurality of battery strips between the bottom plate and the top plate of the lens assembly, arrange them in intervals, adjust the position of each battery strip until the single battery modules on the battery strips are opposite to the lenses, and fix each battery strip on the bottom plate; The circuit board strips of each battery strip are electrically connected through a conductive circuit and are led out of the bottom plate through the positive lead-out electrode and the negative lead-out electrode connected to the conductive circuit; The side panels are installed between the bottom panel and the top panel of the lens group, so that the adjacent side panels are connected to the side surfaces of the columns, and the bottom panel is surrounded. The top panel of the lens group, the side panel assembly and the bottom panel are enclosed to form a closed space to obtain the concentrating photovoltaic assembly.

2. The method for preparing a concentrated photovoltaic module according to claim 1, wherein: The steps to prepare the battery strip include, preparing a plurality of single battery modules; Prepare a circuit board strip, wherein the circuit board strip comprises a substrate, a first insulating layer, a circuit layer, and a second insulating layer stacked from bottom to top; the circuit layer comprises lead contacts, a plurality of first contact groups, and leads; the first contact groups comprise a first positive contact and a first negative contact; lead contacts are provided at both ends of the circuit layer; a plurality of first contact groups spaced apart are provided in the middle of the circuit layer; adjacent first contact groups are connected by leads; the second insulating layer covers the leads but does not cover the lead contacts and the first contact groups; the length direction of the circuit board strip serves as the y-axis direction of the concentrating photovoltaic module; the distance between the centers of two adjacent first contact groups is equal to the distance between the centers of two adjacent lenses in the y-axis direction of the lens assembly top plate; Each of the single battery modules is connected to each of the first contact groups respectively to electrically connect each of the single battery modules with the circuit board strip.

3. The method for preparing a concentrated photovoltaic module according to claim 2, wherein: The steps of preparing a plurality of single battery modules include: Prepare a solar cell, a packaging bracket, bonding wires, and packaging glue; wherein the packaging bracket includes a base and a shell surrounding the base, the base of the packaging bracket includes a second contact group, the second contact group includes a second positive electrode contact and a second negative electrode contact, and the second positive electrode contact and the second negative electrode contact are separated and insulated; Placing the solar cell on the base of the packaging bracket, electrically connecting the positive electrode of the solar cell to the second positive electrode contact, and electrically connecting the negative electrode of the solar cell to the second negative electrode contact via a bonding wire; The packaging glue is filled in the space formed by the base and the shell of the packaging bracket to produce the single battery module.

4. The method for preparing a concentrated photovoltaic module according to claim 3, wherein: The step of connecting each of the single battery modules to each of the first contact groups includes: The second positive contact is electrically connected to the first positive contact, and the second negative contact is electrically connected to the first negative contact.

5. The method for preparing a concentrated photovoltaic module according to claim 3, wherein: One end lead-out contact of each circuit layer is a negative lead-out contact, and the other end lead-out contact is a positive lead-out contact. The step of placing a plurality of the battery strips between the bottom plate and the top plate of the lens assembly and arranging them in intervals includes: Place a plurality of battery strips between the bottom plate and the top plate of the lens assembly, with the negative lead-out contacts of each circuit board strip placed on the same side, and the positive lead-out contacts of each circuit board placed on the same other side; Adjusting the x-axis spacing of each circuit board so that the distance between the centers of two adjacent circuit board strips is equal to the distance between the centers of two adjacent lenses in the top plate of the lens assembly in the x-axis direction, where the x-axis direction is perpendicular to the y-axis direction; The positions of both ends of each circuit board are adjusted so that the center of each solar cell corresponds vertically to the center of each lens.

6. The method for preparing a concentrated photovoltaic module according to claim 5, wherein: The conductive circuit includes a positive lead between the strips and a negative lead between the strips, and the bottom plate is provided with a positive lead hole and a negative lead hole, the positive lead hole and the negative lead hole are located on opposite sides of the bottom plate, or the positive lead hole and the negative lead hole are located on the same side of the bottom plate; The step of electrically connecting the circuit board strips of each battery strip through a conductive circuit and leading the positive lead-out electrode and the negative lead-out electrode connected to the conductive circuit to the outside of the bottom plate includes: Connecting the positive lead points of each of the plates through a positive lead wire, and connecting the negative lead points of each of the plates through a negative lead wire; Pass one end of the positive lead electrode connected to the positive lead between the strips through the positive lead hole to the outside of the bottom plate; One end of the negative lead-out electrode connected to the negative lead between the strips is passed through the negative lead-out hole to the outside of the bottom plate.

7. The method for preparing a concentrated photovoltaic module according to claim 1, wherein: The steps of placing a plurality of battery strips between the bottom plate and the top plate of the lens assembly and arranging them in intervals, adjusting the position of each battery strip until the single battery modules on the battery strips are arranged opposite to the lenses one by one, and fixing each battery strip on the bottom plate respectively include: Place a plurality of the battery strips between the bottom plate and the top plate of the lens assembly, and roughly adjust the x-axis spacing so that the distance between the centers of two adjacent circuit strips is equal to the distance between the centers of two adjacent lenses in the top plate of the lens assembly in the x-axis direction, and the x-axis direction is perpendicular to the y-axis direction, and the y-axis direction is the length direction of the circuit strips; Coarsely adjust the first single battery module at the first end of each battery strip to align with the bottom of the first lens at one end of the corresponding column in the y-axis direction of the lens assembly top plate; Fine-tune the relative position of the first single battery module and the first lens so that the photosensitive center of the first single battery module is vertically aligned with the center of the first lens, and fix the first end of the battery strip; Coarsely adjust the last single battery module at the second end of each battery strip to align with the bottom of the last lens at the other end of the corresponding column in the y-axis direction of the lens assembly top plate; The relative position of the last battery module and the last lens is fine-tuned so that the photosensitive center of the last battery module is vertically aligned with the center of the last lens, and the second end of the battery strip is fixed.

8. The method for preparing a concentrated photovoltaic module according to claim 7, wherein: The step of fine-tuning the relative position of the first single battery module and the first lens so that the photosensitive center position of the first single battery module is vertically aligned with the center of the first lens, and fixing the first end of the battery strip includes: Above the first lens, shine a simulated light source downward onto the first single battery module, and record the output current of the first single battery module; Fine-tune the position of the first single battery module and continuously record the output current at the corresponding position; The maximum value of the output current is determined as the adjustment position of the first single battery module, and when the first single battery module is located at the adjustment position, the first end of the battery strip is fixed to the bottom plate.

9. The method for preparing a concentrated photovoltaic module according to claim 7, wherein: The step of fine-tuning the relative position of the last battery module and the last lens so that the photosensitive center of the last battery module is vertically aligned with the center of the last lens, and fixing the second end of the battery strip comprises: Above the last lens, shine a simulated light source downward onto the last single battery module, and record the output current of the last single battery module; Fine-tuning the position of the last single battery module and continuously recording the output current at the corresponding position; The maximum value of the output current is determined as the adjustment position of the last single battery module, and when the last single battery module is located at the adjustment position, the second end of the battery strip is fixed to the bottom plate.

10. A concentrating photovoltaic module, characterized in that: The concentrated photovoltaic module is prepared by the preparation method according to any one of claims 1 to 9.

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