Solar cell grid line structure

Abstract

The utility model provides a solar cell grid line structure, and relates to the field of cells. The solar cell grid line structure comprises a photovoltaic panel body and a cell body, a plurality of grid line mechanisms arranged at equal intervals are arranged on the surface of the cell body, each grid line mechanism comprises a grid line outer frame, the grid line outer frames are fixedly connected with the cell body, auxiliary grid line bodies are fixedly connected to the interiors of the grid line outer frames, and the auxiliary grid line bodies are fixedly connected with the photovoltaic panel body. The surface of the auxiliary grid line main body is electrically connected with a main grid line main body, and the surface of the main grid line main body is fixedly connected with an illumination enhancing strip. According to the solar cell grid line structure, the cell main body is protected through the photovoltaic panel main body, charges generated by the cell main body are received through the auxiliary grid line main body, the charges received by the auxiliary grid line main body are gathered through the main grid line main body, and light shielded by the main grid line main body is reflected or refracted to the surface of the cell main body through the illumination enhancement strip. The light loss is reduced, and the power generation efficiency of the cell main body is improved.

Description

Technical Field

[0001] The utility model relates to a battery cell grid line, in particular to a solar cell grid line structure, belonging to the technical field of battery cells. Background Art

[0002] Cells are generally divided into single crystal silicon, polycrystalline silicon and amorphous silicon. Single crystal silicon solar cells are the fastest-developed solar cells at present. Their structure and production process have been finalized, and the products have been widely used in space and on the ground. This type of solar cell uses high-purity single crystal silicon rods as raw materials. In order to reduce production costs, solar cells used on the ground use solar-grade single crystal silicon rods, and the material performance indicators have been relaxed.

[0003] The utility model with patent number CN217239477U relates to a novel solar cell and its grid line structure, including a PN junction substrate, a passivation anti-reflection layer, located on the upper layer of the PN junction substrate, a plurality of auxiliary grids, passing through the passivation anti-reflection layer and contacting the PN junction substrate, and a plurality of main grids, located on the upper layer of the passivation anti-reflection layer, vertically overlapping with the auxiliary grids to form a grid structure; a novel grid line structure is adopted to separate the main grid and the auxiliary grid, so that the main grid and the auxiliary grid have a clear division of labor, reduce the contact area and doping area of ​​the metal grid line with the PN junction substrate, and reduce the probability of carrier recombination in the electrode area while ensuring current transmission, thereby reducing the recombination of electron-hole pairs, reducing the power loss of the solar cell, and improving the photoelectric conversion efficiency.

[0004] When the solar cell generates electricity, the secondary grid collects charges and gathers them to the main grid, which is then connected to the external circuit. The device in the above patent reduces power loss, but the area covered by the main grid line is large and light cannot pass through. Therefore, the covered area cannot generate photoelectrons, resulting in efficiency waste. For this reason, we provide a solar cell grid line structure to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The purpose of the utility model is to provide a solar cell grid line structure in order to solve the above-mentioned problem, so as to solve the problem that the main grid line blocks part of the light in the reference document.

[0007] (II) Technical solution

[0008] The utility model is realized through the following technical scheme: a solar cell grid line structure.

[0009] It includes a photovoltaic panel body and a battery cell body, wherein the surface of the battery cell body is provided with a plurality of equally spaced grid line mechanisms, wherein the grid line mechanism includes a grid line outer frame and the grid line outer frame is fixedly connected to the battery cell body, wherein the interior of the grid line outer frame is fixedly connected with a secondary grid line body, the surface of the secondary grid line body is electrically connected with a main grid line body, and the surface of the main grid line body is fixedly connected with a light enhancement strip.

[0010] Preferably, the two ends of the main grid line body are electrically connected to the grid line outer frame, the surface of the main grid line body is fixedly connected with a reinforcement grid line, and the two ends of the reinforcement grid line are electrically connected to the adjacent secondary grid line body, and the connection between the main grid line body and the secondary grid line body is reinforced by the reinforcement grid line.

[0011] Preferably, a right-angle groove is provided on the upper surface of the light enhancement strip, and both ends of the light enhancement strip are fixedly connected to the grid line frame, and the side surface of the light enhancement strip is perpendicular to the battery cell body. The right-angle groove reduces the reflection of light on the upper surface of the light enhancement strip, so that the light received on the upper surface of the light enhancement strip can be better refracted to the surface of the battery cell body.

[0012] Preferably, a connecting wire is electrically connected to the surface of the gate wire outer frame, and the other end of the connecting wire is electrically connected to an adjacent gate wire outer frame, and a plurality of groups of gate wire outer frames are electrically connected via the connecting wire.

[0013] Preferably, a rubber insulating ring is fixedly connected inside the photovoltaic panel body, and the inner wall of the rubber insulating ring is fixedly connected to the battery cell body. The edge of the battery cell body is isolated by the rubber insulating ring to prevent the loss of charge generated by the battery cell body.

[0014] Preferably, a sealed shell is fixedly connected to the surface of the photovoltaic panel body, and a high-light-transmittance glass plate is fixedly connected to the middle of the sealed shell, so that the battery cell body is protected by the sealed shell and the high-light-transmittance glass plate.

[0015] Preferably, an external electrical box is fixedly connected to the surface of the photovoltaic panel body, and the external electrical box is electrically connected to the grid wire frame, and the charge conducted by the grid wire frame is collected through the external electrical box and transmitted to an external storage device.

[0016] The utility model provides a solar cell grid line structure, which has the following beneficial effects:

[0017] 1. The solar cell grid line structure protects the cell body through the photovoltaic panel body and determines the position of the cell body to prevent the cell body from being damaged by the outside during the power generation process, thereby improving the power generation efficiency of the cell body. After the cell body generates charges, the charges generated by the cell body are received through the secondary grid line body, and the charges received by the secondary grid line body are aggregated through the main grid line body and then transmitted to the grid line outer frame. Through the light enhancement strip, the light blocked by the main grid line body is reflected or refracted to the surface of the cell body, thereby reducing the light blocked by the main grid line body and improving the power generation efficiency of the cell body.

[0018] 2. The grid line structure of the solar cell sheet is used to reinforce the grid lines and the connection between the main grid line body and the auxiliary grid line body, so as to reduce the influence of cold welding during welding and improve the efficiency of the auxiliary grid line body to transmit charge to the main grid line body. The right-angle groove is used to reduce the reflection of light on the upper surface of the light enhancement strip, and at the same time, the area of ​​the light enhancement strip receiving light is increased, so that the light received by the light enhancement strip is better refracted to the surface of the battery sheet body. The side of the light enhancement strip is vertical, so that the light received by the side of the light enhancement strip can be directly reflected to the battery sheet body. Through connecting wires, several groups of grid line frames are electrically connected to improve the efficiency of the grid line frame in transmitting electricity. Through rubber insulating rings, the edges of the battery sheet body are isolated to avoid the loss of charge generated by the battery sheet body and improve the power generation stability of the battery sheet body. Through sealed shells and high-light-transmittance glass plates, the battery sheet body is protected to avoid damage to the battery sheet body caused by external interference and improve the power generation stability of the battery sheet body. Through external electrical boxes, the charges conducted by the grid line frames are collected and transmitted to external storage devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is an exploded schematic diagram of the overall structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the grid line mechanism of the utility model;

[0022] Figure 4 For this utility model Figure 3 A-section structure enlarged view.

[0023]

Main component symbol description

[0024] 1. Photovoltaic panel body; 2. Sealed shell; 3. High light transmittance glass plate; 4. Battery body; 5. External electrical box; 6. Rubber insulation ring;

[0025] 7. Grid line structure; 701. Grid line outer frame; 702. Sub-grid line body; 703. Main grid line body; 704. Light enhancement strip; 705. Right-angle groove; 706. Reinforced grid line; 707. Connecting wire. DETAILED DESCRIPTION

[0026] The embodiment of the utility model provides a solar cell grid line structure.

[0027] See also Figure 1 and Figure 2 , including a photovoltaic panel body 1 and a battery cell body 4. The photovoltaic panel body 1 protects the battery cell body 4, determines the position of the battery cell body 4, prevents the battery cell body 4 from being damaged by the outside during the power generation process, and improves the power generation efficiency of the battery cell body 4.

[0028] A rubber insulating ring 6 is fixedly connected to the inside of the photovoltaic panel body 1, and the inner wall of the rubber insulating ring 6 is fixedly connected to the battery cell body 4. The rubber insulating ring 6 is used to isolate the edge of the battery cell body 4 to prevent the loss of charge generated by the battery cell body 4 and improve the power generation stability of the battery cell body 4.

[0029] A sealed shell 2 is fixedly connected to the surface of the photovoltaic panel body 1, and a high-transmittance glass plate 3 is fixedly connected to the middle of the sealed shell 2. The sealed shell 2 and the high-transmittance glass plate 3 protect the battery cell body 4 to avoid damage to the battery cell body 4 caused by external interference, thereby improving the stability of power generation of the battery cell body 4.

[0030] See also Figure 3 and Figure 4 The surface of the battery cell body 4 is provided with a plurality of equally spaced grid line mechanisms 7, the grid line mechanism 7 comprises a grid line outer frame 701 and the grid line outer frame 701 is fixedly connected to the battery cell body 4, the interior of the grid line outer frame 701 is fixedly connected with a secondary grid line body 702, the surface of the secondary grid line body 702 is electrically connected with a main grid line body 703, the surface of the main grid line body 703 is fixedly connected with a light enhancement strip 704, after the battery cell body 4 generates charges, the secondary grid line body 702 receives the charges generated by the battery cell body 4, the main grid line body 703 collects the charges received by the secondary grid line body 702, and then transmits them to the grid line outer frame 701, and the light blocked by the main grid line body 703 is reflected or refracted to the surface of the battery cell body 4 through the light enhancement strip 704, thereby reducing the blocking of light by the main grid line body 703 and improving the power generation efficiency of the battery cell body 4.

[0031] The two ends of the main grid line body 703 are electrically connected to the grid line outer frame 701, and the surface of the main grid line body 703 is fixedly connected with a reinforcement grid line 706, and the two ends of the reinforcement grid line 706 are electrically connected to the adjacent secondary grid line body 702. The reinforcement grid line 706 is used to reinforce the connection between the main grid line body 703 and the secondary grid line body 702, thereby reducing the impact of cold welding during welding and improving the efficiency of the secondary grid line body 702 in transmitting charge to the main grid line body 703.

[0032] A right-angle groove 705 is provided on the upper surface of the illumination enhancement strip 704, and both ends of the illumination enhancement strip 704 are fixedly connected to the grid line frame 701, and the side of the illumination enhancement strip 704 is perpendicular to the battery cell body 4. The right-angle groove 705 reduces the reflection of light on the upper surface of the illumination enhancement strip 704, and increases the area of ​​the illumination enhancement strip 704 receiving light, so that the light received by the illumination enhancement strip 704 is better refracted to the surface of the battery cell body 4. By making the side of the illumination enhancement strip 704 vertical, the light received by the side of the illumination enhancement strip 704 can be directly reflected to the battery cell body 4.

[0033] The surface of the gate frame 701 is electrically connected with a connecting wire 707, and the other end of the connecting wire 707 is electrically connected to an adjacent gate frame 701. Through the connecting wire 707, several groups of gate frames 701 are electrically connected to improve the efficiency of power transmission of the gate frames 701.

[0034] The surface of the photovoltaic panel body 1 is fixedly connected to an external electrical box 5, and the external electrical box 5 is electrically connected to the grid wire frame 701. The charges conducted by the grid wire frame 701 are collected through the external electrical box 5 and transmitted to an external storage device.

[0035] When the utility model is in use: first fix the battery cell body 4 in the middle of the rubber insulating ring 6, electrically connect the grid line outer frame 701 at the end to the external electrical box 5, close the sealed shell 2, receive the light through the battery cell body 4 to generate electric charge, receive the electric charge generated by the battery cell body 4 through the secondary grid line body 702, collect the electric charge received by the secondary grid line body 702 through the main grid line body 703, and then conduct it to the grid line outer frame 701, electrically connect several groups of grid line outer frames 701 through connecting wires 707, collect the electric charge conducted by the grid line outer frame 701 through the external electrical box 5, and transmit it to an external storage device, and at the same time, reflect or refract the light blocked by the main grid line body 703 to the surface of the battery cell body 4 through the light enhancement strip 704 and the right-angle groove 705, reduce the blocking of light by the main grid line body 703, and improve the power generation efficiency of the battery cell body 4.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A solar cell grid line structure, comprising a photovoltaic panel body (1) and a cell body (4), characterized in that: The surface of the battery cell body (4) is provided with a plurality of equally spaced grid line mechanisms (7), the grid line mechanism (7) comprises a grid line outer frame (701) and the grid line outer frame (701) is fixedly connected to the battery cell body (4), the interior of the grid line outer frame (701) is fixedly connected to a secondary grid line body (702), the surface of the secondary grid line body (702) is electrically connected to a main grid line body (703), and the surface of the main grid line body (703) is fixedly connected to a light enhancement strip (704).

2. A solar cell grid line structure according to claim 1, characterized in that: The two ends of the main grid line body (703) are electrically connected to the grid line outer frame (701), the surface of the main grid line body (703) is fixedly connected with a reinforcement grid line (706), and the two ends of the reinforcement grid line (706) are electrically connected to the adjacent secondary grid line body (702).

3. The solar cell grid line structure according to claim 1, characterized in that: A right-angle groove (705) is provided on the upper surface of the light enhancement strip (704), two ends of the light enhancement strip (704) are fixedly connected to the grid line outer frame (701), and the side surface of the light enhancement strip (704) is perpendicular to the battery cell body (4).

4. The solar cell grid line structure according to claim 1, characterized in that: The surface of the gate wire outer frame (701) is electrically connected to a connecting wire (707), and the other end of the connecting wire (707) is electrically connected to an adjacent gate wire outer frame (701).

5. The solar cell grid line structure according to claim 1, characterized in that: A rubber insulating ring (6) is fixedly connected inside the photovoltaic panel body (1), and the inner wall of the rubber insulating ring (6) is fixedly connected to the battery cell body (4).

6. The solar cell grid line structure according to claim 1, characterized in that: A sealed shell (2) is fixedly connected to the surface of the photovoltaic panel body (1), and a high-light-transmittance glass plate (3) is fixedly connected to the middle of the sealed shell (2).

7. The solar cell grid line structure according to claim 1, characterized in that: An external electrical box (5) is fixedly connected to the surface of the photovoltaic panel body (1), and the external electrical box (5) is electrically connected to the grid wire outer frame (701).

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