Concentrating photovoltaic module

Abstract

The utility model discloses a concentrating photovoltaic assembly, which comprises a bottom plate, a side plate assembly, a lens group top plate and a plurality of battery strips, a closed space is defined by the lens set top plate, the side plate assembly and the bottom plate, the battery strips are located in the closed space, and the battery strips are arranged on the bottom plate at intervals. The lens group top plate comprises a plurality of lenses arranged in an array, and each battery strip comprises a circuit board strip and a plurality of single battery modules arranged on the circuit board strip; the circuit board strips of the battery strips are electrically connected through conductive circuits, and are led out of the closed space through positive electrode leading-out electrodes and negative electrode leading-out electrodes which are connected to the conductive circuits; the lenses and the single battery modules are arranged in one-to-one correspondence; and the photoelectric conversion efficiency of the concentrating photovoltaic cell is improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a concentrated photovoltaic module. Background Technology

[0002] With the increasing demand for clean energy, photovoltaic technology, with its low-carbon and environmentally friendly characteristics, has become one of the most watched technologies in the power generation field. However, photovoltaic technology currently faces two major limitations: low efficiency and high cost, which seriously restrict its large-scale promotion and application.

[0003] Concentrated photovoltaic (CPV) technology uses relatively low-cost concentrating optical elements to focus sunlight onto a small-area photovoltaic cell, achieving highly efficient photoelectric conversion. Specifically, CPV technology utilizes Fresnel lens arrays to focus sunlight onto the surface of a gallium arsenide (GaAs) cell array with high photoelectric conversion efficiency, achieving efficient power generation with small-sized cells. However, in practical applications, CPV technology suffers from a problem where the cell and the center of the Fresnel lens can easily become misaligned. This prevents sunlight from fully illuminating the cell surface, leading to reduced photoelectric conversion efficiency and hindering the full realization of the technology's advantages. Utility Model Content

[0004] In view of this, the present invention provides a concentrating photovoltaic module to solve the problem of misalignment between the center of the battery and the center of the lens in the prior art of concentrating photovoltaic technology.

[0005] To achieve one or more of the above objectives or other objectives, this utility model proposes a concentrating photovoltaic module, including a base plate, a side plate assembly, a lens assembly top plate, and several battery strips;

[0006] The top plate of the lens group, the side plate assembly, and the bottom plate enclose a closed space, and a plurality of battery bars are located within the closed space, with each battery bar arranged at intervals on the bottom plate;

[0007] The top plate of the lens group includes a plurality of lenses arranged in an array, and each battery bar includes a circuit board and a plurality of individual battery modules arranged on the circuit board; the circuit boards of each battery bar are electrically connected to each other through conductive lines, and are led out to the outside of the enclosed space through positive and negative lead-out electrodes connected to the conductive lines; the lenses and the individual battery modules are arranged opposite to each other.

[0008] Furthermore, the circuit board strip includes a substrate, a first insulating layer, a circuit layer, and a second insulating layer stacked from bottom to top. The circuit layer includes lead-out contacts, a plurality of first contact groups, and leads. The first contact groups include a first positive contact and a first negative contact. Lead-out contacts are provided at both ends of the circuit layer, and a plurality of spaced-apart first contact groups 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-out contacts and the first contact groups. Each individual battery module is connected to each of the first contact groups to achieve electrical communication between each individual battery module and the circuit board strip.

[0009] Furthermore, each of the circuit layers has a negative terminal lead-out point at one end and a positive terminal lead-out point at the other end. The circuit strips are arranged side by side at intervals, with the negative terminal lead-out points of each circuit strip located on the same side and the positive terminal lead-out points of each circuit strip located on the same opposite side. The conductive circuit includes positive leads and negative leads between the strips. The positive leads between the strips connect the positive terminal lead-out points, and the negative leads between the strips connect the negative terminal lead-out points.

[0010] Furthermore, the length direction of the circuit board strip is taken as the y-axis direction of the concentrating photovoltaic module, and the distance between the centers of two adjacent first contact points is equal to the distance between the centers of two adjacent lenses in the y-axis direction of the top plate of the lens group; the distance between the centers of two adjacent circuit boards is equal to the distance between the centers of two adjacent lenses in the x-axis direction of the top plate of the lens group, and the x-axis direction is perpendicular to the y-axis direction.

[0011] Furthermore, the single-cell battery module includes a solar cell, a packaging bracket, bonding wires, and encapsulating adhesive. The packaging bracket includes a base and a shell surrounding the base. The base of the packaging bracket includes a second contact group, which includes a second positive contact and a second negative contact. An insulating portion is provided between the second positive contact and the second negative contact. The solar cell is disposed on the base of the packaging bracket, and the positive terminal of the solar cell is electrically connected to the second positive contact. The negative terminal of the solar cell is electrically connected to the second negative contact via bonding wires. The space formed by the base and the shell of the packaging bracket is filled with the encapsulating adhesive. 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.

[0012] Furthermore, the center of each solar cell corresponds perpendicularly to the center of each lens.

[0013] Furthermore, the side panel assembly includes several side panels and several columns, with the sides of adjacent side panels and columns connected to enclose the base plate on all four sides.

[0014] Furthermore, each of the side panels of the side panel assembly is respectively disposed on each side of the base plate, and each of the uprights is respectively disposed at each apex of the base plate; the top plate of the lens assembly includes a frame disposed on the periphery, the shape of the frame matching the side panel assembly, and the combination of the top plate of the lens assembly and the base plate is realized by aligning the frame with the uprights; the gap between the side panel assembly and the frame is filled with sealant.

[0015] Furthermore, the base plate is provided with a positive electrode lead-out hole and a negative electrode lead-out hole. One end of the positive electrode lead-out hole passes through the positive electrode lead-out hole to the outside of the enclosed space, and one end of the negative electrode lead-out hole passes through the negative electrode lead-out hole to the outside of the enclosed space. The positive electrode lead-out hole and the negative electrode lead-out hole are located on opposite sides of the base plate, or the positive electrode lead-out hole and the negative electrode lead-out hole are located on the same side of the base plate.

[0016] Furthermore, both ends of the battery strip are fixedly connected to the base plate.

[0017] Implementing the embodiments of this utility model will have the following beneficial effects:

[0018] The concentrating photovoltaic module provided by this utility model effectively solves the problem of misalignment between individual battery modules and lenses by setting the battery array into several separate battery bars and adjusting the position of each battery bar one by one to align the individual battery modules on the top plate of the lens group. This ensures that sunlight can hit the surface of the individual battery modules to the maximum extent, thus improving the photoelectric conversion efficiency of the concentrating photovoltaic cells. Moreover, each battery bar does not interfere with each other. Even if the individual battery module on one battery bar is misaligned with the lens, it will not affect the alignment of the individual battery modules and lenses on other battery bars, greatly reducing the cost of use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] in:

[0021] Figure 1 This is an exploded view of the structure of a concentrated photovoltaic module in one embodiment;

[0022] Figure 2 This is an exploded view of the structure of a concentrated photovoltaic module in yet another embodiment;

[0023] Figure 3 This is a schematic cross-sectional view of a concentrated photovoltaic module in one embodiment;

[0024] Figure 4 This is a cross-sectional structural diagram of the battery strip in one embodiment;

[0025] Figure 5 This is a top view of the battery strip structure in one embodiment;

[0026] Figure 6 This is a schematic diagram of the wiring of a concentrated photovoltaic module in one embodiment;

[0027] Figure 7 This is a schematic diagram of the wiring of a concentrated photovoltaic module in another embodiment;

[0028] Figure 8 This is a cross-sectional structural diagram of a single battery module in one embodiment;

[0029] Figure 9 This is a top view of a single battery module in one embodiment;

[0030] Figure 10 This is a schematic diagram of the packaging bracket structure of a single battery module in one embodiment;

[0031] Figure 11 This is a schematic diagram of an operation method for aligning the battery strip with the top plate of the lens assembly in one embodiment.

[0032] Explanation of the attached drawing numbers:

[0033] 1: Base plate; 11: Positive electrode lead-out hole; 12: Negative electrode lead-out hole;

[0034] 2: Side panel assembly; 21: Side panel; 22: Column;

[0035] 3: Top plate of lens group; 31: Lens; 32: Frame;

[0036] 4: Battery pack;

[0037] 41: Circuit board strip; 411: Substrate; 412: First insulating layer; 413: Circuit layer; 4131: First contact group; 4132: Lead wire; 4133: Negative lead-out contact; 4134: Positive lead-out contact; 414: Second insulating layer;

[0038] 42: Single cell module; 421: Solar cell; 422: Base; 423: Housing; 4231: Second positive terminal contact; 4232: Second negative terminal contact; 4233: Insulating part; 424: Bonding wire; 425: Encapsulating adhesive;

[0039] 51: Positive lead between laths; 52: Negative lead between laths;

[0040] 61: Positive electrode; 62: Negative electrode. Detailed Implementation

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] To enable those skilled in the art to better understand 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.

[0044] Reference Figures 1-3 The present invention illustrates a concentrating photovoltaic module, including a base plate 1, a side plate assembly 2, a lens assembly top plate 3, and a plurality of battery strips 4;

[0045] The top plate 3 of the lens group, 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, with each battery strip 4 arranged at intervals on the bottom plate 1;

[0046] The top plate 3 of the lens group includes a plurality of lenses 31 arranged in an array. Each battery bar 4 includes a circuit board 41 and a plurality of individual battery modules 42 arranged on the circuit board 41. The circuit boards 41 of each battery bar 4 are electrically connected to each other through conductive lines, and are led out to the outside of the enclosed space through positive lead-out electrodes 61 and negative lead-out electrodes 62 connected to the conductive lines. The lenses 31 and the individual battery modules 42 are arranged opposite to each other.

[0047] In this embodiment, the side plate assembly 2 can be made of lightweight materials with a certain strength, such as aluminum alloy, stainless steel, carbon steel, carbon fiber, and plastic. The base plate 1 can be made of materials such as metal, glass, and glass fiber reinforced plastic. The top plate 3 of the lens group includes a Fresnel lens group for achieving efficient light focusing. The Fresnel lens divides the curved surface of a traditional lens into a series of concentric annular serrations, which greatly reduces the amount of material and the thickness of the lens while ensuring the light focusing effect, and has the advantages of light weight and low cost. The lenses 31 in the Fresnel lens group are arranged in an array. When sunlight is incident on the surface of the Fresnel lens, it is refracted by the serrated structure and the light is focused. The lens 31 focuses a large area of ​​sunlight onto the surface of the corresponding smaller single-cell battery module 42 (such as a gallium arsenide battery) below, thereby forming a light spot with higher energy density on the surface of the single-cell battery module 42 and improving its photoelectric conversion efficiency. Several battery strips 4 are arranged at certain intervals between the base plate 1 and the top plate 3 of the lens group. During the arrangement process, the position of the battery strips 4 is adjusted, and with the help of testing equipment, a precise one-to-one correspondence between the individual battery modules 42 and the lens 31 is achieved. Then, the battery strips 4 are fixed to the base plate 1 using welding, bonding, and other methods. This achieves a precise correspondence between the battery strips 4 and the lens 31, ensuring that sunlight can be accurately focused onto the individual battery modules 42, thus improving photoelectric conversion efficiency. Conductive circuits (such as wires, conductive strips, FPCs, etc.) electrically connect the circuit boards 41 of each battery strip 4, connecting them into a complete circuit system according to series or parallel circuit design requirements. After connection, positive electrode 61 and negative electrode 62 are welded onto the conductive circuits and led out to the outside of the base plate 1 for connection with external circuits. The side plate assembly 2 surrounds the base plate 1 and the top plate 3 of the lens group, and sealant is filled in the gaps between the side plate assembly 2, the base plate 1, and the top plate 3 of the lens group to form a closed concentrating photovoltaic module.

[0048] This embodiment solves the problem of misalignment between the individual battery modules 4 and the Fresnel lens (lens 31 on the top plate 3 of the lens group) by adjusting the position of each battery module 4 individually. This ensures that sunlight can reach the surface of the individual battery modules 42 to the maximum extent, thus improving the photoelectric conversion efficiency of the concentrated photovoltaic cell. Furthermore, each battery module 4 in this embodiment does not interfere with the others. Even if the individual battery module 42 on one battery module 4 is misaligned with the lens 31, it will not affect the alignment of the individual battery modules 42 and the lens 31 on other battery modules 4. Even if a single battery module 4 malfunctions, maintenance can be performed by replacing the individual battery module 4, greatly reducing operating costs.

[0049] Reference Figures 4-5In one specific embodiment, the circuit board 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 lead-out contacts, a plurality of first contact groups 4131, and leads 4132. The first contact groups 4131 include a first positive contact and a first negative contact. Lead-out contacts are provided at both ends of the circuit layer 413, and a plurality of spaced-apart first contact groups 4131 are provided in the middle of the circuit layer 413. Adjacent first contact groups 4131 are connected by leads 4132. The second insulating layer 414 covers the leads 4132 but does not cover the lead-out contacts and the first contact groups 4131. Each individual battery module 42 is connected to each of the first contact groups 4131, thereby realizing the electrical connection between each individual battery module 42 and the circuit board 41.

[0050] In this embodiment, a suitable substrate 411 and first / second insulating layer materials are selected. For example, the substrate material includes epoxy resin fiberglass board, and the insulating layer material includes, for example, polyimide, epoxy resin, etc. The substrate 411 and the first insulating layer 412 are stacked using conventional processes. Then, lead contacts, first contact groups 4131, and leads 4132 are formed on the first insulating layer 412 according to a predetermined design circuit using processes such as photolithography and electroplating. Finally, a second insulating layer 414 is coated and cured onto the surface of the leads 4132. The second insulating layer 414 uses the same or similar material as the first insulating layer 412, ensuring that the lead contacts and first contact groups 4131 are exposed, facilitating subsequent electrical connection with other components. Individual battery modules 42 are sequentially placed on the corresponding first contact groups 4131, and the electrodes of the individual battery modules 42 are connected to the first contact groups 4131 of the circuit board strip 41, thereby achieving electrical connection between the individual battery modules 42 and the circuit board strip 41.

[0051] Compared to existing technologies that lay out the circuit layer on the entire base plate 1, this embodiment uses battery strips 4, which have a small insulation layer area, saving raw materials; the circuit layer 413 is easier to lay than on the entire base plate 1, as it only involves one-dimensional wiring, resulting in high precision; the width of the circuit strip 41 only needs to be greater than the width of the individual battery module 42, resulting in low cost; the base plate 1 below the battery strip 4 can be made of materials such as glass (existing technologies require the use of a single metal base plate), which greatly reduces the weight and cost of the concentrated photovoltaic module.

[0052] Reference Figures 6-7In one specific embodiment, one end of each circuit layer 413 is a negative terminal lead-out contact 4133, and the other end is a positive terminal lead-out contact 4134. The circuit strips 41 are arranged side by side at intervals, and the negative terminal lead-out contacts 4133 of each circuit strip 41 are located on the same side, while the positive terminal lead-out contacts 4134 of each circuit strip 41 are located on the same other side. The conductive circuit includes a positive lead wire 51 between the strips and a negative lead wire 52 between the strips. The positive terminal lead-out contacts 4134 are connected through the positive lead wire 51 between the strips, and the negative terminal lead-out contacts 4133 are connected through the negative lead wire 52 between the strips.

[0053] In this embodiment, when several battery strips 4 are placed between the base plate 1 and the top plate 3 of the lens group, all battery strips 4 are placed in the same direction, so that the negative lead-out terminals 4133 of each circuit strip 41 are placed on the same side and the positive lead-out terminals 4134 are placed on the other side. Thus, a straight positive lead wire 51 between the strips can be used to weld each positive lead-out terminal 4134, and a straight negative lead wire 52 between the strips can be used to weld each negative lead-out terminal 4133, thus constructing a complete and simple parallel circuit.

[0054] In one specific embodiment, the length direction of the circuit board strip 41 is taken as the y-axis direction of the concentrating photovoltaic module. The distance between the centers of two adjacent first contact point 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; the distance between the centers of two adjacent circuit board strips 41 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. This ensures that sunlight can be perpendicularly and accurately irradiated onto the surface of the solar cell 421, maximizing the concentration effect and photoelectric conversion efficiency.

[0055] Reference Figures 8-10In one specific embodiment, the single-cell battery module 42 includes a solar cell 421, a packaging bracket, bonding wires 424, and encapsulating adhesive 425. 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, which includes a second positive contact 4231 and a second negative contact 4232. An insulating portion 4233 is disposed between the second positive contact 4231 and the second negative contact 4232. The battery 421 is disposed on the base 422 of the encapsulation bracket, and the positive electrode of the solar cell 421 is electrically connected to the second positive electrode contact 4231. The negative electrode of the solar cell 421 is electrically connected to the second negative electrode contact 4232 through a bonding wire 424. The space formed by the base 422 and the outer shell 423 of the encapsulation bracket is filled with the encapsulating adhesive 425. 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.

[0056] In this embodiment, the solar cell 421 can be selected from types such as gallium arsenide solar cells, cadmium telluride solar cells, or silicon-based solar cells. The bonding wire 424 possesses good conductivity and flexibility, such as a conductive metal wire. The encapsulating adhesive 425 can be selected from existing technologies and possesses characteristics such as high light transmittance (preferably greater than 92%), strong insulation, good mechanical strength, and weather resistance, such as epoxy resin adhesive or silicone, to reduce light loss and protect the electrical connection between the bonding wire 424 and the negative electrode contact. The positive electrode of the solar cell 421 is electrically connected to the second positive electrode contact 4231 of the encapsulation bracket using silver paste die bonding technology / solder paste reflow soldering technology; the negative electrode of the solar cell 421 is electrically connected to the second negative electrode contact 4232 of the encapsulation bracket via the bonding wire 424. By connecting the positive and negative electrodes of the solar cell 421 to the second contact group, and the second contact group being electrically connected to the circuit board strip 41, the electrical connection between the individual cell module 42 and the circuit board strip 41 is achieved. The insulating outer shell 423 of the encapsulation bracket and the base 422 surround and form a cavity. After the electrical connection between the positive and negative electrodes of the solar cell 421 and the second contact group is completed, encapsulating adhesive 425 is applied into the cavity, filling the entire cavity and leveling the surface. The encapsulating adhesive 425 is then cured according to the curing process requirements, forming a sealed single-cell battery module 42.

[0057] The single-cell battery module 42 in this embodiment can provide targeted encapsulation and protection for the solar cell 421 and each contact point, thereby improving the weather resistance and service life of the battery module. The encapsulating adhesive 425 only needs to be filled in the cavity of the encapsulation bracket, which can save the amount of encapsulating adhesive 425 and reduce the manufacturing cost of concentrated photovoltaic cells.

[0058] In one specific embodiment, the center of each solar cell 421 corresponds perpendicularly to the center of each lens 31, thereby optimizing the energy conversion of the concentrated photovoltaic cell.

[0059] Reference Figures 1-2 In one specific embodiment, the side panel assembly 2 includes a plurality of side panels 21 and a plurality of columns 22, with the sides of adjacent side panels 21 and columns 22 connected to enclose the base plate 1 on all four sides.

[0060] In one specific embodiment, each side plate 21 of the side plate assembly 2 is respectively disposed on each side of the base plate 1, and each column 22 is respectively disposed at each apex corner of the base plate 1; the lens assembly top plate 3 includes a frame 32 disposed on the periphery, the shape of the frame 32 matching the side plate assembly 2, and the combination of the lens assembly top plate 3 and the base plate 1 is realized by aligning the frame 32 with the column 22; the gap between the side plate assembly 2 and the frame 32 is filled with sealant.

[0061] In the specific assembly process, several pre-fabricated columns 22 are vertically placed on the base plate 1, distributed according to the pre-designed positions. Then, the lens assembly top plate 3 is 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 located at the four apex positions of the base plate 1, and the columns 22 are L-shaped to match the apex positions. After assembling the battery strips 4, the side plates 21 are sequentially installed between the base plate 1 and the lens assembly top plate 3, so that the adjacent side plates 21 are tightly connected to the sides of the columns 22. The gaps between the side plates 21, columns 22, and lens assembly top plate 3 are filled with sealant, and finally the base plate 1 is surrounded to form a closed space, completing the fabrication of the concentrated photovoltaic module.

[0062] Reference Figures 6-7 In one specific embodiment, the base 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 base 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 base plate 1.

[0063] In this embodiment, as Figure 6 As shown, in one specific embodiment, the positive electrode 61 and negative electrode 62 of the concentrated photovoltaic module are close to each other, and holes on the same side are opened at corresponding positions on the base plate 1, allowing for subsequent connection of a junction box. Figure 7As shown, in another specific embodiment, the positive electrode 61 and the negative electrode 62 of the concentrated photovoltaic module are separated from each other, and holes are opened on opposite sides at corresponding positions on the base plate 1. A split junction box needs to be installed later, but the length of the positive electrode 61 and the negative electrode 62 can be reduced, the impedance can be reduced, and the failure rate can be reduced.

[0064] In one specific embodiment, both ends of the battery strip 4 are fixedly connected to the base plate 1. After precisely adjusting the position of each battery strip 4, both ends of the battery strip 4 are fixed to the base plate 1, thus achieving positional fixation of the battery strip 4.

[0065] Reference Figures 1-10 In the preparation process of the concentrated photovoltaic cell of this utility model embodiment, the following preparation method is adopted, including:

[0066] Prepare a base plate 1, a side plate assembly 2, a lens group top plate 3, and several battery strips 4, wherein the side plate assembly 2 includes several side plates 21 and several columns 22, the lens group top plate 3 includes several lenses 31 arranged in an array, and each battery strip 4 includes a circuit board strip 41 and several individual battery modules 42 arranged on the circuit board strip 41.

[0067] A number of the columns 22 are supported between the base plate 1 and the top plate 3 of the lens group, so that the base plate 1 and the top plate 3 of the lens group are arranged opposite to each other;

[0068] Several battery strips 4 are placed between the base plate 1 and the top plate 3 of the lens group and arranged at intervals. The position of each battery strip 4 is adjusted until the individual battery modules 42 on the battery strip 4 are positioned opposite the lens 31 one by one. Each battery strip 4 is then fixed on the base plate 1.

[0069] The circuit board strips 41 of each battery strip 4 are electrically connected through conductive lines and led out to the outside of the base plate 1 through the positive lead-out electrode 61 and the negative lead-out electrode 62 connected to the conductive lines.

[0070] The side plate 21 is installed between the base plate 1 and the top plate 3 of the lens assembly, so that the sides of the adjacent side plates 21 and the column 22 are connected, and the base plate 1 is surrounded on all four sides. The top plate 3 of the lens assembly, the side plate assembly 2 and the base plate 1 are enclosed to form a closed space, thus obtaining the concentrating photovoltaic module.

[0071] In one specific embodiment, the steps for preparing the battery strip 4 include:

[0072] Several single-cell battery modules 42 were prepared;

[0073] A circuit board strip 41 is fabricated, comprising 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 lead-out contacts, a plurality of first contact groups 4131, and leads 4132. The first contact groups 4131 include a first positive contact and a first negative contact. Lead-out contacts are provided at both ends of the circuit layer 413, and a plurality of spaced-apart first contact groups 4131 are provided in the middle of the circuit layer 413. Adjacent first contact groups 4131 are connected by leads 4132. The second insulating layer 414 covers the leads 4132 but does not cover the lead-out contacts or the first contact groups 4131. The length direction of the circuit board strip 41 is taken 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.

[0074] Each of the individual battery modules 42 is connected to each of the first contact groups 4131 to electrically connect each of the individual battery modules 42 to the circuit board 41.

[0075] In one specific embodiment, the step of preparing a plurality of single-cell battery modules 42 includes:

[0076] Prepare a solar cell 421, a packaging bracket, bonding wires 424, and encapsulating adhesive 425; 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, 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 apart and insulated from each other;

[0077] The solar cell 421 is placed 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. The negative electrode of the solar cell 421 is electrically connected to the second negative electrode contact 4232 through the bonding wire 424.

[0078] The encapsulating adhesive 425 is filled into the space formed by the base 422 and the outer shell 423 of the encapsulation bracket to obtain the single battery module 42.

[0079] In one specific embodiment, the step of connecting each of the individual battery modules 42 to each of the first contact groups 4131 includes:

[0080] The second positive terminal 4231 is electrically connected to the first positive terminal, and the second negative terminal 4232 is electrically connected to the first negative terminal.

[0081] In one specific embodiment, one end of each of the circuit layers 413 has a negative terminal contact 4133, and the other end has a positive terminal contact 4134.

[0082] The step of placing a plurality of battery strips 4 between the base plate 1 and the top plate 3 of the lens assembly at intervals includes:

[0083] Several battery strips 4 are placed between the base plate 1 and the top plate 3 of the lens group, and the negative lead-out contact 4133 of each circuit board strip 41 is placed on the same side, and the positive lead-out contact 4134 of each circuit board is placed on the same other side.

[0084] Adjust the x-axis spacing of each circuit board so that the distance between the centers of two adjacent circuit board strips 41 is equal to the distance between the centers of two adjacent lenses 31 in the x-axis direction of the top plate 3 of the lens group, and the x-axis direction is perpendicular to the y-axis direction;

[0085] Adjust the positions of both ends of each circuit board so that the center of each solar cell 421 is perpendicularly aligned with the center of each lens 31.

[0086] In one specific embodiment, the conductive line includes a positive lead 51 between slats and a negative lead 52 between slats. The base plate 1 is provided with a positive lead hole 11 and a negative lead hole 12. The positive lead hole 11 and the negative lead hole 12 are located on opposite sides of the base plate 1, or the positive lead hole 11 and the negative lead hole 12 are located on the same side of the base plate 1.

[0087] The step of electrically connecting the circuit board strips 41 of each battery bar 4 through conductive lines and leading them out to the outside of the base plate 1 through the positive electrode 61 and negative electrode 62 connected to the conductive lines includes:

[0088] Each of the positive electrode leads 4134 is connected by a positive electrode lead 51 between the slats, and each of the negative electrode leads 4133 is connected by a negative electrode lead 52 between the slats.

[0089] One end of the positive lead-out electrode 61 connected to the positive lead wire 51 between the strips passes through the positive lead-out hole 11 to the outside of the base plate 1;

[0090] One end of the negative electrode 62, which is connected to the negative electrode lead 52 between the slats, is passed through the negative electrode lead hole 12 to the outside of the base plate 1.

[0091] In one specific embodiment, the steps of placing a plurality of battery strips 4 between the base plate 1 and the top plate 3 of the lens group at intervals, adjusting the position of each battery strip 4 until the individual battery modules 42 on the battery strip 4 are aligned with the lenses 31 one by one, and fixing each battery strip 4 to the base plate 1 respectively include:

[0092] Several battery strips 4 are placed between the base plate 1 and the top plate 3 of the lens group, and the x-axis spacing is coarsely adjusted 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 x-axis direction of the top plate 3 of the lens group. 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.

[0093] The first single battery module at the first end of each battery bar 4 is roughly adjusted to be aligned with the first lens at the y-axis direction of the corresponding column of the top plate 3 of the lens group.

[0094] The relative positions of the first single battery module and the first lens are finely adjusted so that the photosensitive center of the first single battery module is perpendicularly aligned with the center of the first lens, and the first end of the battery strip 4 is fixed.

[0095] Coarsely adjust the last individual battery module at the second end of each battery strip 4 to be aligned with the bottom of the last lens at the other end of the corresponding column of the top plate 3 of the lens group in the y-axis direction.

[0096] The relative positions of the last individual battery module and the last lens are finely adjusted so that the photosensitive center of the last individual battery module is perpendicularly aligned with the center of the last lens, and the second end of the battery strip 4 is fixed.

[0097] Reference Figure 11 In one specific embodiment, the step of fine-tuning the relative position of the first single-cell battery module and the first lens, so that the photosensitive center of the first single-cell battery module is perpendicularly aligned with the center of the first lens, and fixing the first end of the battery strip 4, includes:

[0098] Above the first lens, a simulated light source is projected downwards onto the first single-cell battery module, and the output current of the first single-cell battery module is recorded.

[0099] Fine-tune the position of the first single-cell battery module and continuously record the output current at the corresponding position;

[0100] 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 in the adjustment position, the first end of the battery strip 4 is fixed on the base plate 1.

[0101] Reference Figure 11In one specific embodiment, the step of finely adjusting the relative position of the last individual battery module and the last lens, so that the photosensitive center of the last individual battery module is perpendicularly aligned with the center of the last lens, and fixing the second end of the battery strip 4, includes:

[0102] Above the final lens, a simulated light source is projected downwards onto the final single-cell battery module, and the output current of the final single-cell battery module is recorded.

[0103] Fine-tune the position of the last individual battery module and continuously record the output current at the corresponding position;

[0104] The maximum value of the output current is determined as the adjustment position of the last individual battery module, and when the last individual battery module is in the adjustment position, the second end of the battery strip 4 is fixed on the base plate 1.

[0105] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; conversely, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A concentrated photovoltaic module, characterized in that, Includes a base plate, side plate assembly, lens assembly top plate, and several battery strips; The top plate of the lens group, the side plate assembly, and the bottom plate enclose a closed space, and a plurality of battery bars are located within the closed space, with each battery bar arranged at intervals on the bottom plate; The top plate of the lens group includes a plurality of lenses arranged in an array, and each battery bar includes a circuit board and a plurality of individual battery modules arranged on the circuit board; the circuit boards of each battery bar are electrically connected to each other through conductive lines, and are led out to the outside of the enclosed space through positive and negative lead-out electrodes connected to the conductive lines; the lenses and the individual battery modules are arranged opposite to each other.

2. The concentrated photovoltaic module as described in claim 1, characterized in that, The circuit board strip includes a substrate, a first insulating layer, a circuit layer, and a second insulating layer stacked from bottom to top. The circuit layer includes lead-out contacts, a plurality of first contact groups, and leads. The first contact groups include a first positive contact and a first negative contact. Lead-out contacts are provided at both ends of the circuit layer, and a plurality of spaced-apart first contact groups 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-out contacts and the first contact groups. Each individual battery module is connected to each of the first contact groups to achieve electrical communication between each individual battery module and the circuit board strip.

3. The concentrating photovoltaic module as described in claim 2, characterized in that, One end of each circuit layer is a negative terminal, and the other end is a positive terminal. The circuit strips are arranged side by side at intervals, with the negative terminals of each circuit strip located on the same side and the positive terminals of each circuit strip located on the opposite side. The conductive circuit includes positive leads and negative leads between the strips. The positive leads between the strips connect the positive terminals, and the negative leads between the strips connect the negative terminals.

4. The concentrated photovoltaic module as described in claim 3, characterized in that, The length direction of the circuit board strip is taken as the y-axis direction of the concentrating photovoltaic module. The distance between the centers of two adjacent first contact points is equal to the distance between the centers of two adjacent lenses in the y-axis direction of the top plate of the lens group. The distance between the centers of two adjacent circuit boards is equal to the distance between the centers of two adjacent lenses in the x-axis direction of the top plate of the lens group. The x-axis direction is perpendicular to the y-axis direction.

5. The concentrated photovoltaic module as described in claim 2, characterized in that, The single-cell battery module includes a solar cell, a packaging bracket, bonding wires, and encapsulating adhesive. The packaging bracket includes a base and a shell surrounding the base. The base of the packaging bracket includes a second contact group, which includes a second positive contact and a second negative contact. An insulating portion is provided between the second positive contact and the second negative contact. The solar cell is disposed on the base of the packaging bracket, and the positive terminal of the solar cell is electrically connected to the second positive contact. The negative terminal of the solar cell is electrically connected to the second negative contact via bonding wires. The space formed by the base and the shell of the packaging bracket is filled with the encapsulating adhesive. 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.

6. The concentrated photovoltaic module as described in claim 5, characterized in that, The center of each solar cell corresponds perpendicularly to the center of each lens.

7. The concentrated photovoltaic module as described in claim 1, characterized in that, The side panel assembly includes several side panels and several columns, with the sides of adjacent side panels and columns connected to enclose the base plate on all four sides.

8. The concentrated photovoltaic module as described in claim 7, characterized in that, Each of the side panels of the side panel assembly is respectively disposed on each side of the base plate, and each of the columns is respectively disposed at each apex corner of the base plate; the top plate of the lens assembly includes a frame disposed on the periphery, the shape of the frame matching the side panel assembly, and the combination of the top plate of the lens assembly and the base plate is realized by aligning the frame with the columns; the gap between the side panel assembly and the frame is filled with sealant.

9. The concentrating photovoltaic module as described in claim 1, characterized in that, The base plate is provided with a positive electrode lead-out hole and a negative electrode lead-out hole. One end of the positive electrode lead-out hole passes through the positive electrode lead-out hole to the outside of the enclosed space, and one end of the negative electrode lead-out hole passes through the negative electrode lead-out hole to the outside of the enclosed space. The positive electrode lead-out hole and the negative electrode lead-out hole are located on opposite sides of the base plate, or the positive electrode lead-out hole and the negative electrode lead-out hole are located on the same side of the base plate.

10. The concentrating photovoltaic module as described in claim 1, characterized in that, The two ends of the battery strip are fixedly connected to the base plate.

Images