Solar cell

Abstract

The utility model discloses a solar cell, which relates to the technical field of solar cells and comprises a middle layer, an N-type region is mounted at the upper end of the middle layer, a P-type region is mounted at the lower end of the middle layer, and four side surfaces of the N-type region and the P-type region are respectively provided with a fixed concentric-square-shaped plate. Extension plates are mounted in the fixed concentric-square-shaped plates on the front and rear sides of the N-type region and the P-type region, two silver-plated interfaces are formed in each extension plate, and grooves are formed in the fixed concentric-square-shaped plates on the left and right sides of the N-type region and the P-type region. According to the utility model, a series of structures are arranged, the two solar cells are detachably clamped and connected through the silver-plated interface and the silver-plated plugging interface, silver can ensure the flow of electrons, welding is not needed during installation, and only the two solar cells need to be separated under the condition that recovery is needed, so that the solar cell module is more convenient and faster.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, in particular to a solar cell sheet. Background Art

[0002] Solar cells are divided into crystalline silicon and amorphous silicon, and are mainly used to convert solar energy into electrical energy.

[0003] A conventional solar cell can produce several watts of electricity, so multiple solar cells are connected together to form a solar panel, usually 32 in number. The multiple solar cells are connected by hot-melt silver. However, this connection with silver not only requires specialized welding tools, but also makes the disassembly of the multiple solar cells after welding more cumbersome when recycling the solar cells. Utility Model Content

[0004] The purpose of the present invention is to provide a solar cell to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a solar cell, comprising an intermediate layer, an N-type region installed at the upper end of the intermediate layer, a P-type region installed at the lower end of the intermediate layer, a fixed return plate installed on each of the four sides of the N-type region and the P-type region, an extension plate installed inside the fixed return plate on the front and rear sides of the N-type region and the P-type region, two silver-plated interfaces provided inside the extension plate, a groove provided inside the fixed return plate on the left and right sides of the N-type region and the P-type region, two silver-plated plug interfaces provided inside the groove, and the sizes of the silver-plated plug interfaces and the silver-plated interfaces being adapted to each other.

[0006] Preferably, annular grooves are provided at the front ends of the fixed return plates on the front and rear sides of the N-type area and the P-type area, and annular blocks are installed at the front ends of the fixed return plates on the left and right sides of the N-type area and the P-type area, and the sizes of the annular blocks and the annular grooves are adapted to each other.

[0007] Preferably, a second circular plug-in board is installed inside the silver-plated interface, and a first circular plug-in board is installed inside the silver-plated plug-in interface, and the first circular plug-in board and the second circular plug-in board are arranged alternately.

[0008] Preferably, a limiting arc block is installed at the front end of the groove on both sides of the silver-plated plug interface, and a limiting arc groove is opened at the front end of the extension plate on both sides of the silver-plated interface, and the sizes of the limiting arc groove and the limiting arc block are matched.

[0009] Preferably, a silicon nitride film is installed on the upper end of the N-type region.

[0010] Preferably, an aluminum plate is installed at the lower end of the P-type region.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. This solar cell is constructed by installing extension plates at the front and rear ends of the N-type region and the P-type region, with a silver-plated interface at the front end of the extension plate, and grooves at the left and right ends of the N-type region and the P-type region. Silver-plated plug interfaces are installed inside the grooves, and the silver-plated interfaces are connected to the silver mesh on the surface of the N-type region. After the middle layer absorbs sunlight, the electrons of the silicon inside are excited and become free, and enter the N-type region, while the holes then enter the P-type region. The electrons in the N-type region enter the P-type region through the external silver mesh and connecting wires, thereby forming an electric current. The two solar cells are detachably connected by the silver-plated interface and the silver-plated plug interface. Silver can ensure the flow of electrons. No welding is required during installation. When recycling is required, only the two solar cells need to be separated, which is more convenient and quick.

[0013] 2. This solar cell is provided with a silver-plated second circular plug-in plate inside the silver-plated interface, and a silver-plated first circular plug-in plate inside the silver-plated plug-in interface. The first circular plug-in plate and the second circular plug-in plate are staggered with each other and can be plugged together intact, thereby increasing the contact area between the two solar cells. The mutual plug-in method can increase stability to a certain extent and reduce the occurrence of falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a front view of the split structure of the overall structure of the utility model;

[0016] Figure 3 For this utility model Figure 2 A magnified view of middle A;

[0017] Figure 4 It is a side view of the split structure of the overall structure of the utility model;

[0018] Figure 5 For this utility model Figure 4 Magnified view of B.

[0019] In the figure: 1. Intermediate layer; 2. N-type region; 3. P-type region; 4. Silicon nitride film; 5. Aluminum plate; 6. Fixed return plate; 7. First return plate; 8. Extension plate; 9. Limiting arc groove; 10. Annular slot; 11. Silver-plated interface; 12. Second return plate; 13. Annular block; 14. Groove; 15. Limiting arc block; 16. Silver-plated plug interface. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figures 1 to 5 As shown, the solar cell of this embodiment includes an intermediate layer 1, the main material of the intermediate layer 1 is silicon, the upper end of the intermediate layer 1 is installed with an N-type region 2, the N-type region 2 is made of silicon-phosphorus material. Since phosphorus has more electrons than silicon, the N-type region 2 has more electrons that can move freely and has better conductivity. The lower end of the intermediate layer 1 is installed with a P-type region 3, the P-type region 3 is made of silicon-boron material. Boron has fewer electrons and will lack more electrons. The missing positions are holes. A fixed return plate 6 is installed on the four sides of the N-type region 2 and the P-type region 3. The fixed return plate 6 is made of insulating material. The N-type region 2 and the P-type region Extension plates 8 are installed inside the fixed return plates 6 on the front and rear sides of the 3, and two silver-plated interfaces 11 are provided inside the extension plates 8. Grooves 14 are provided inside the fixed return plates 6 on the left and right sides of the N-type area 2 and the P-type area 3, and two silver-plated plug interfaces 16 are installed inside the grooves 14. The silver-plated plug interfaces 16 and the silver-plated plug interfaces 11 are of compatible size. The two solar cells are detachably connected through the silver-plated plug interfaces 11 and 16. Silver can ensure the flow of electrons. When recycling is required, only the two solar cells need to be separated, which is more convenient and quick.

[0023] Specifically, an annular groove 10 is provided at the front end of the fixed return plate 6 on the front and rear sides of the N-type area 2 and the P-type area 3, and an annular block 13 is installed at the front end of the fixed return plate 6 on the left and right sides of the N-type area 2 and the P-type area 3. The sizes of the annular block 13 and the annular groove 10 are adapted to each other. The two solar cells are connected through the annular groove 10 and the annular block 13, and the annular groove 10 and the annular block 13 are in a detachable connection relationship. It should be noted that after connecting multiple solar cells and placing them inside the solar panel, it is necessary to ensure that both ends of the solar cells are squeezed to ensure the stability of the connection of multiple solar cells.

[0024] Furthermore, a second circular plug-in plate 12 is installed inside the silver-plated interface 11, and a first circular plug-in plate 7 is installed inside the silver-plated plug-in port 16. The first circular plug-in plate 7 and the second circular plug-in plate 12 are staggered with each other. By arranging the second silver-plated circular plug-in plate 12 inside the silver-plated interface 11 and the first silver-plated circular plug-in plate 7 inside the silver-plated plug-in port 16, the first circular plug-in plate 7 and the second circular plug-in plate 12 are staggered with each other, so that they can be plugged together intact, thereby increasing the contact area between the two solar cells. The mutual plug-in method can increase stability to a certain extent and reduce the occurrence of falling off.

[0025] Furthermore, a limiting arc block 15 is installed at the front end of the groove 14 on both sides of the silver-plated plug interface 16, and a limiting arc groove 9 is opened at the front end of the extension plate 8 on both sides of the silver-plated interface 11. The sizes of the limiting arc groove 9 and the limiting arc block 15 are adapted to each other. By inserting the limiting arc block 15 into the limiting arc groove 9, a certain limiting effect can be played in the vertical direction.

[0026] Furthermore, a silicon nitride film 4 is installed on the upper end of the N-type region 2, and an aluminum plate 5 is installed on the lower end of the P-type region 3. The silicon nitride film 4 is used to reduce the reflection of sunlight so that the middle layer 1 can absorb more sunlight. The aluminum plate 5 plays a certain conductive role. The electrons generated in the N-type region 2 first pass through the silver mesh into the external connecting wire, and then pass from the wire through the aluminum plate 5 into the interior of the P-type region 3.

[0027] The method of using this embodiment is as follows: by installing an extension plate 8 at the front and rear ends of the N-type region 2 and the P-type region 3, a silver-plated interface 11 is provided at the front end of the extension plate 8, grooves 14 are provided at the left and right ends of the N-type region 2 and the P-type region 3, and a silver-plated plug interface 16 is installed inside the groove 14. The silver-plated interface 11 is connected to the silver mesh on the surface of the N-type region 2. After the intermediate layer 1 absorbs sunlight, the electrons of the silicon inside are excited and become free, and enter the N-type region 2, while the holes then enter the P-type region 3. The electrons in the N-type region 2 enter the P-type region 3 through the external silver mesh and the connecting wire, thereby forming an electric current. The two solar cells are detachably connected by the silver-plated interface 11 and the silver-plated plug interface 16. Silver can ensure the flow of electrons. No welding is required during installation. When recycling is required, only the two solar cells need to be separated, which is more convenient and quick.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A solar cell comprising an intermediate layer (1), characterized in that: The upper end of the intermediate layer (1) is provided with an N-type region (2), the lower end of the intermediate layer (1) is provided with a P-type region (3), four sides of the N-type region (2) and the P-type region (3) are provided with a fixed return plate (6), the fixed return plates (6) on the front and rear sides of the N-type region (2) and the P-type region (3) are provided with extension plates (8), the extension plates (8) are provided with two silver-plated interfaces (11), the fixed return plates (6) on the left and right sides of the N-type region (2) and the P-type region (3) are provided with grooves (14), the grooves (14) are provided with two silver-plated plug interfaces (16), and the sizes of the silver-plated plug interfaces (16) and the silver-plated interfaces (11) are adapted to each other.

2. The solar cell according to claim 1, wherein: The front ends of the fixed return plates (6) on the front and rear sides of the N-type region (2) and the P-type region (3) are provided with annular clamping grooves (10), and the front ends of the fixed return plates (6) on the left and right sides of the N-type region (2) and the P-type region (3) are provided with annular clamping blocks (13), and the sizes of the annular clamping blocks (13) and the annular clamping grooves (10) are adapted to each other.

3. The solar cell according to claim 1, wherein: A second circular plug-in board (12) is installed inside the silver-plated interface (11), and a first circular plug-in board (7) is installed inside the silver-plated plug-in interface (16), wherein the first circular plug-in board (7) and the second circular plug-in board (12) are arranged in an interlaced manner.

4. The solar cell according to claim 1, wherein: A limiting arc-shaped block (15) is installed at the front end of the groove (14) at positions on both sides of the silver-plated plug interface (16), and a limiting arc-shaped groove (9) is opened at the front end of the extension plate (8) at positions on both sides of the silver-plated interface (11), and the sizes of the limiting arc-shaped groove (9) and the limiting arc-shaped block (15) are adapted to each other.

5. The solar cell according to claim 1, wherein: A silicon nitride film (4) is installed on the upper end of the N-type region (2).

6. The solar cell according to claim 1, wherein: An aluminum plate (5) is installed at the lower end of the P-type region (3).

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