CN214378469U

CN214378469U - Photovoltaic cell structure

Info

Publication number: CN214378469U
Application number: CN202120420990.XU
Authority: CN
Inventors: 陈国栋
Original assignee: Xi'an Edemai Photoelectric Technology Co ltd
Current assignee: Xi'an Edemai Photoelectric Technology Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-10-08
Anticipated expiration: 2031-02-25

Abstract

The utility model discloses a photovoltaic cell piece structure, including photovoltaic cell chip main part, the top of photovoltaic cell chip main part, fixedly connected with photovoltaic cell chip sensitive surface, the top fixedly connected with copper wire grid line of photovoltaic cell chip sensitive surface, the copper wire grid line has a plurality ofly, a plurality of copper wire grid lines become equidistance and arrange in the top of photovoltaic cell chip sensitive surface, and the top contact of copper wire grid line has copper line master grid line, one side that copper line master grid line kept away from photovoltaic cell chip sensitive surface is equipped with the copper wire coating, copper wire coating fixed connection is in the top of photovoltaic cell chip sensitive surface, the inner chamber of copper wire coating is equipped with copper wire sinle silk; when the photovoltaic module is used, the grid lines and the main grid lines are manufactured, the photovoltaic module can be used for collecting and collecting photocurrent, and the battery pieces prepared by the finished electrodes can be used for series-parallel connection between subsequent battery pieces and further used for connection and preparation procedures of the photovoltaic module.

Description

Photovoltaic cell structure

Technical Field

The utility model relates to a photovoltaic cell piece field especially relates to photovoltaic cell piece structure.

Background

After the preparation of each functional layer of the existing crystalline silicon battery and the high-efficiency battery taking a silicon wafer as a base material is finished, the output of the electrical performance is mainly collected and output by collecting a photon-generated carrier by an electrode on the outermost surface, wherein the electrode structure on the outermost surface and the preparation mode are mainly manufactured by printing and sintering conductive silver paste or conductive aluminum paste under the screen printing equipment technology, namely a conventional so-called conductive grid line and a bus main grid line; the used material is slurry, the slurry mainly takes silver paste and aluminum paste at present, the electrode preparation means mainly comprises screen printing equipment and technology, partial small-scale experimental schemes can also adopt ink jet, spraying, electroplating, mask deposition, exposure etching and other schemes, a sintering mode is adopted in the process, the prepared slurry material on the surface of the battery and the battery are solidified to form an electrode, and the manufacturing of the battery cell unit is completed.

However, most of the existing pastes mainly use silver paste, aluminum paste and other fluids, and due to the noble metal characteristics and the processing granularity requirements of silver powder, aluminum powder and other materials and the specific requirements in the aspects of fluid storage and transportation, the price of the raw materials is high, the reduction space of the manufacturing cost of the subsequent photovoltaic cell is greatly limited, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a photovoltaic cell piece structure.

In order to solve the technical problem, the utility model provides a following technical scheme: the photovoltaic cell piece structure comprises a photovoltaic cell chip main body, wherein a photovoltaic cell chip illuminated surface is fixedly connected to the top end of the photovoltaic cell chip main body, copper wire grid lines are fixedly connected to the top end of the photovoltaic cell chip illuminated surface, the number of the copper wire grid lines is multiple, the copper wire grid lines are arranged on the top end of the photovoltaic cell chip illuminated surface at equal intervals, a copper wire main grid line is contacted with the top end of the copper wire grid line, a copper wire coating layer is arranged on one side, away from the photovoltaic cell chip illuminated surface, of the copper wire main grid line, the copper wire coating layer is fixedly connected to the top end of the photovoltaic cell chip illuminated surface, and a copper wire core is arranged in an inner cavity of the copper wire coating layer.

As a preferred technical scheme of the utility model, the outside of copper line owner grid line is equipped with copper owner grid line coating, the inner chamber of copper line owner grid line is equipped with copper owner grid sinle silk.

As an optimized technical scheme of the utility model, copper line main grid line adopts copper strips class structure, and the outside same cladding one deck contains glass powder and other supporting material substances.

As an optimized technical scheme of the utility model, the diameter of copper wire grid line is between zero one millimeter to a millimeter.

As an optimal technical scheme of the utility model, the length of copper line main grid line equals the length of photovoltaic cell chip sensitive surface.

As an optimized technical scheme of the utility model, the width and the thickness of copper line owner grid line are zero point one millimeter respectively to five millimeters and zero point one millimeter respectively to between two millimeters.

As an optimized technical scheme of the utility model, the cross-section of photovoltaic cell chip main part is fillet rectangle.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

1. through setting up the copper wire grid line, can adopt modes such as infiltration solidification or spraying solidification to accomplish the preparation of copper wire coating and copper main grid line coating on copper wire sinle silk and copper main grid sinle silk during the use. Then according to the design requirement of a surface electrode required by a photovoltaic cell chip main body, combining the copper wire grid lines with the light receiving surface of the photovoltaic cell chip under the condition of heating and matching with a certain pressure in a winding hot-pressing mode, and then vertically fixing the copper wire main grid lines on the copper wire grid lines and the light receiving surface of the photovoltaic cell chip under the condition of heat and pressure in a similar mode to complete the manufacture of the grid lines and the main grid lines for collecting and collecting photocurrent.

2. Through setting up copper line main grid line, make the copper line replace the thick liquids electrode, corresponding process equipment can adopt the mode of wire winding circular telegram or local hot pressing to replace screen printing equipment, and equipment is more ripe stable relatively, consequently can and then reduce equipment cost by a wide margin, promotes technology controllability, increases the process window.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic side view of the present invention;

fig. 3 is a schematic structural view of a copper wire grid line of the present invention;

fig. 4 is a schematic structural view of the copper wire main grid line of the present invention.

Wherein: 1. a photovoltaic cell chip body; 2. a copper wire grid line; 3. a light receiving surface of the photovoltaic cell chip; 4. A copper wire bus bar; 5. copper wire coating layer; 6. a copper wire core; 7. a copper main grid line coating layer; 8. copper main grid wire core.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the invention easy to understand, the invention is further explained below with reference to the specific embodiments, but the following embodiments are only the preferred embodiments of the invention, not all. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1-4, the utility model provides a photovoltaic cell piece structure, including photovoltaic cell chip main part 1, the top of photovoltaic cell chip main part 1, fixedly connected with photovoltaic cell chip sensitive surface 3, the top of photovoltaic cell chip sensitive surface 3 is fixedly connected with copper wire grid line 2, copper wire grid line 2 has a plurality ofly, a plurality of copper wire grid lines 2 become equidistance and arrange in the top of photovoltaic cell chip sensitive surface 3, and the top contact of copper wire grid line 2 has copper wire main grid line 4, one side that copper wire main grid line 4 keeps away from photovoltaic cell chip sensitive surface 3 is equipped with copper wire coating 5, copper wire coating 5 is fixedly connected in the top of photovoltaic cell chip sensitive surface 3, the inner chamber of copper wire coating 5 is equipped with copper wire sinle silk 6;

through the arrangement of the copper wire grid lines 2, the preparation of the copper wire coating layer 5 and the copper main grid line coating layer 7 can be completed on the copper wire core 6 and the copper main grid line core 8 in the modes of infiltration curing or spraying curing and the like during use, then the copper wire grid lines 2 are combined with the light receiving surface 3 of the photovoltaic cell chip under the condition of heating and matching a certain pressure in a winding hot-pressing mode according to the design requirements of the surface electrode required by the photovoltaic cell chip main body 1, then the copper wire main grid lines 4 are vertically fixed on the copper wire grid lines 2 and the light receiving surface 3 of the photovoltaic cell chip under the conditions of heat and pressure in a similar mode, the manufacture of the grid lines and the main grid lines is completed and used for collecting and collecting photocurrent, and the cell pieces prepared by the completed electrodes can be used for series-parallel connection between subsequent cell pieces and further used for the connection and preparation process of the photovoltaic module.

In other embodiments, a copper main grid line coating layer 7 is arranged outside the copper wire main grid line 4, and a copper main grid line core 8 is arranged in an inner cavity of the copper wire main grid line 4;

through setting up copper line main grid line 4, make the copper line replace the thick liquids electrode, corresponding process equipment can adopt the mode of wire winding circular telegram or local hot pressing to replace screen printing equipment, and equipment is more ripe stable relatively, consequently can and then reduce equipment cost by a wide margin, promotes technology controllability, increases the process window.

In other embodiments, the copper wire main grid line 4 adopts a copper strip structure, and a layer of glass powder and other matched materials are also coated outside the copper wire main grid line;

the copper wire main grid line 4 is arranged to adopt a copper strip structure, so that the conductive wire of the photovoltaic cell chip is better.

In other embodiments, the diameter of the copper wire grating 2 is between zero and one millimeter;

the diameter of the copper wire grid line 2 is zero and one millimeter between zero and one millimeter, so that the copper wire grid line 2 can be attached to the photovoltaic cell chip.

In other embodiments, the length of the copper wire main grid line 4 is equal to the length of the light receiving surface 3 of the photovoltaic cell chip;

the length of the copper wire main grid line 4 is equal to that of the light receiving surface 3 of the photovoltaic cell chip, so that the connection between the copper wire main grid line 4 and the light receiving surface 3 of the photovoltaic cell chip is more stable.

In other embodiments, the width and thickness of the copper wire busbar 4 are between one and five tenths of a millimeter and one and two tenths of a millimeter, respectively;

through the width thickness that sets up copper line main grid line 4, make copper line main grid line 4 and photovoltaic cell piece laminate more.

In other embodiments, the cross-section of the photovoltaic cell chip body 1 is a rounded rectangle;

the cross section of the photovoltaic cell chip main body 1 is a rounded rectangle, so that the connection and combination among the photovoltaic cell chip main bodies 1 are more convenient.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Photovoltaic cell piece structure, including photovoltaic cell chip main part (1), its characterized in that: the photovoltaic cell chip comprises a photovoltaic cell chip main body (1), a photovoltaic cell chip light-receiving surface (3) is fixedly connected to the top end of the photovoltaic cell chip light-receiving surface (3), a plurality of copper wire grid lines (2) are fixedly connected to the top end of the photovoltaic cell chip light-receiving surface (3), the copper wire grid lines (2) are arranged on the top end of the photovoltaic cell chip light-receiving surface (3) at equal intervals, copper wire main grid lines (4) are contacted with the top end of the copper wire grid lines (2), a copper wire coating layer (5) is arranged on one side, away from the photovoltaic cell chip light-receiving surface (3), of the copper wire main grid lines (4), the copper wire coating layer (5) is fixedly connected to the top end of the photovoltaic cell chip light-receiving surface (3), and a copper wire core (6) is arranged in an inner cavity of the copper wire coating layer (5).

2. The photovoltaic cell sheet structure of claim 1, wherein: the copper wire main grid line coating layer (7) is arranged outside the copper wire main grid line (4), and a copper main grid line core (8) is arranged in an inner cavity of the copper wire main grid line (4).

3. The photovoltaic cell sheet structure of claim 1, wherein: the copper wire main grid line (4) adopts a copper strip structure, and the outer part of the copper wire main grid line is also coated with a layer of glass powder and other matched material substances.

4. The photovoltaic cell sheet structure of claim 1, wherein: the diameter of the copper wire grid line (2) is zero and between one millimeter and one millimeter.

5. The photovoltaic cell sheet structure of claim 1, wherein: the length of the copper wire main grid line (4) is equal to that of the light receiving surface (3) of the photovoltaic cell chip.

6. The photovoltaic cell sheet structure of claim 1, wherein: the width and the thickness of the copper wire main grid line (4) are respectively between one-to-five millimeters at zero point and one-to-two millimeters at zero point.

7. The photovoltaic cell sheet structure of claim 1, wherein: the cross section of the photovoltaic cell chip main body (1) is in a round corner rectangular shape.