CN204651334U - A kind of solar components structure - Google Patents

Abstract

The utility model discloses a solar module structure, which comprises a battery sheet, wherein, the front side of the battery sheet is provided with a front electrode, and the back side is provided with a back electrode, and the front electrode includes a main grid arranged on the left edge of the battery sheet , the back electrode is located on the right edge of the battery sheet and is parallel to the main grid, and multiple battery sheets are stacked and connected through the main grid and back electrodes of adjacent battery sheets to form a battery string, The adjacent battery strings are connected to each other. During the manufacturing process of the solar module structure, the busbars of the front electrodes of the cells are directly contacted and laminated with the back electrodes, thereby eliminating the need to use solder ribbons to connect the front and back sides of the cells, reducing the The amount of solder ribbon used in the module reduces the shading area, improves the utilization efficiency of the sunlight irradiating the solar module structure, and improves the power of the module.

Description

A solar module structure

technical field

The utility model belongs to the technical field of solar energy, in particular to a solar component structure.

Background technique

A solar module is a device that directly converts light energy into electrical energy based on the photovoltaic effect. Conventional crystalline silicon solar cells generally use more than one busbar to be centered on the front and back of the cell, the auxiliary grid lines and the main grid are vertically centered and evenly distributed, and the position of the back electrode is consistent with the positive electrode busbar. In current module production, it is necessary to use ribbons to connect the front of a cell to the back of an adjacent cell to form a series circuit. This design has the following characteristics:

The components made of cells must be welded with ribbons. The stress of welding will cause cell fragments; the temperature of welding will destroy the PN junction of cells;

The shading area of the welding strip is relatively large, and the resulting power loss is 3% to 4%;

When the solar cell with this structure is formed into a module, a certain gap must be maintained between the cell and the cell directly for bending of the solder ribbon. If the distance is too small, the rate of fragmentation will increase.

Utility model content

The utility model provides a solar module structure, which reduces the usage amount of the welding ribbon of the module and improves the power of the module.

In order to solve the above technical problems, the embodiment of the utility model provides a solar module structure, including a battery sheet, wherein, the front side of the battery sheet is provided with a front electrode, and the back side is provided with a back electrode, and the front electrode includes a The main grid on the left edge of the battery slice, the back electrode is located on the right edge of the battery slice, and is parallel to the main grid, and the main grid and the adjacent battery slices are passed between multiple battery slices. The back electrodes are stacked and connected to form battery strings, and adjacent battery strings are connected to each other.

Preferably, the main grid and the back electrode of the adjacent battery slices are bonded by conductive glue.

Preferably, the battery string includes 2 to 15 battery slices.

Preferably, the number of the battery strings is an even number.

Preferably, the battery slices at the same position of the adjacent battery strings are placed in opposite directions, and the adjacent battery strings are connected by bus bars.

Preferably, a junction box is further included, and the main grid and the back electrode that are not stacked in the battery string are connected to the junction box using a bus bar.

Preferably, the bus bar is a bus bar using the conductive adhesive and soldering tape.

Compared with the prior art, the solar module structure provided by the embodiment of the utility model has the following beneficial effects:

The solar module structure provided by the embodiment of the present invention includes a cell, wherein, the front of the cell is provided with a front electrode, and the back is provided with a back electrode, and the front electrode is provided on the left edge of the cell. The back electrode is located on the right edge of the battery sheet and is parallel to the main grid, and multiple battery sheets are formed by stacking the main grid and the back electrode of the adjacent battery sheet. battery strings, adjacent battery strings are connected to each other.

During the manufacturing process of the solar module structure, the busbars of the front electrodes of the cells are directly contacted and stacked with the back electrodes, thereby eliminating the need to use solder ribbons to connect the front and back sides of the cells, reducing the The amount of soldering ribbon used in the module simplifies the welding process, reduces the shading area, reduces the manufacturing cost of the module, improves the utilization efficiency of sunlight irradiating the solar module structure, and improves the power of the module.

To sum up, the solar module structure provided by the embodiments of the present utility model reduces the usage of module solder ribbons, reduces the shading area, and improves the power of the module through the stacking of adjacent cells.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present utility model. Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is the left side view of the solar cell module structure provided by the utility model embodiment;

Fig. 2 is a structural schematic diagram of a battery string in a solar cell assembly structure provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of connection of battery slices between battery strings in the structure of the solar battery module provided by the embodiment of the present invention.

Detailed ways

As mentioned in the background technology section, in the production of components in the prior art, it is necessary to use a ribbon to connect the front of the cell to the back of the adjacent cell to form a series circuit, so that the component made of the cell must be welded with a ribbon. The stress of welding will cause cell fragments; the temperature of welding will destroy the PN junction of the cell; the shading area of the solder strip is large, and the resulting power loss is 3% to 4%; solar cells with this structure form components There must be a certain gap between the battery and the battery directly for the bending of the welding strip. If the distance is too small, the fragmentation rate will increase.

Based on this, an embodiment of the present invention provides a solar module structure, including a battery sheet, wherein, the front side of the battery sheet is provided with a front electrode, and the back side is provided with a back electrode, and the front electrode includes a battery sheet arranged on the battery sheet The main grid on the left edge, the back electrode is located on the right edge of the battery sheet, and is parallel to the main grid, and the multiple battery sheets are stacked by the main grid and the back electrode of the adjacent battery sheet The connections form battery strings, and the adjacent battery strings are connected to each other.

In summary, during the manufacturing process of the solar module structure, the main grid of the front electrode of the battery sheet is directly contacted and laminated with the back electrode, thereby eliminating the need to use solder ribbons to connect the front side of the battery sheet. With the back side, the usage amount of the solder ribbon of the module is reduced, the shading area is reduced, the welding process is simplified, the manufacturing cost of the module is reduced, the utilization efficiency of the sunlight irradiating the solar module structure is improved, and the power of the module is improved.

In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings.

In the following description, specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar extensions without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementations disclosed below.

Referring to Fig. 1 and Fig. 2, Fig. 1 is the left side view of the cell sheet in the solar cell assembly structure provided by the embodiment of the present utility model; Fig. 2 is the view of the battery string in the solar cell assembly structure provided by the embodiment of the present utility model Schematic.

In a specific embodiment, the solar module structure includes a battery sheet 10, wherein a front electrode 11 is provided on the front of the battery sheet 10, and a back electrode 12 is provided on the back, and the front electrode 11 includes a The main grid on the left edge of the battery slice 10, the back electrode 12 is located on the right edge of the battery slice 10, and is parallel to the main grid, and the plurality of battery slices 10 pass through the adjacent battery slices The main grid and the back electrode of 10 are stacked and connected to form a battery string 100, and adjacent battery strings 100 are connected. It should be noted that, except that the arrangement of the solar cell module 10 above is different from that of the existing modules, the order of lamination of the modules is the same as that of conventional modules, which is glass-EVA-cell 10-EVA-backsheet , the material used is not limited to one type, and different glass, EVA, backplane, bus bar, conductive glue, junction box, frame, and battery sheets 10 with different efficiency levels or similar patterns can be matched according to the requirements of the order.

Preferably, the main grid and the back electrode adjacent to the battery sheet 10 are bonded by conductive glue. Since the width of the main grid and the back electrode of the battery sheet 10 is on the order of microns, the use of conductive glue can achieve high line resolution and improve adhesion precision. The use of conductive adhesive is simple and easy to operate, replacing traditional lead-tin soldering and improving production efficiency. It should be noted that the present invention does not specifically limit the conductive adhesive.

On the basis of the above embodiments, in a specific implementation manner of the present invention, the battery string 100 includes 2 to 15 battery slices 10 . Since each battery sheet 10 has the same size and almost the same output power, the power of the entire solar module structure is positively related to the number of batteries in a single battery string 100 and the number of battery strings 100 . According to different power requirements, battery strings 100 including different numbers of battery slices 10 are selected. It should be noted that, in general components, the battery string 100 includes 2 to 15 battery slices 10, and the number of battery slices 10 contained in the battery string 100 can be further adjusted according to actual needs. This is not specifically limited.

On the basis of the above embodiments, in a specific implementation manner of the present utility model, the number of the battery strings 100 is an even number. The number of the battery strings 100 is an even number, and the electrodes leading out of the solar module structure are on both sides of the battery string 100, and the solar module structure generally uses a bus bar to lead outwards, so that it is set so that the outward leads At this time, the process of the bus bar becomes simple, and the distance between the positive bus bar and the negative bus bar of the whole circuit is far, which improves the operation safety of the solar cell module structure. It should be noted that as long as the number of the battery strings 100 is an even number, the present invention does not specifically limit the number of the battery strings 100 .

On the basis of the above-mentioned embodiments, in a specific implementation manner of the present invention, as shown in FIG. The strings 100 are connected by bus bars. The adjacent battery strings 100 connected in series can increase the output voltage of the solar module structure, reduce the current, reduce the Joule heat generated during operation, reduce the temperature of the solar module structure, and improve the operation of the solar module structure Reliability, reduce aging speed.

On the basis of the above-mentioned embodiments, in a specific implementation manner of the present invention, a junction box is also included, and the main grid and the back electrode that are not stacked in the battery string 100 use a bus bar and the Junction box connection. The solar module structure has multiple strings of parallel battery strings 100, the electrodes at both ends of the middle battery string 100 are connected to the electrodes of the adjacent battery strings 100, and the battery strings in the first row 100 and the battery strings 100 in the last row have only one end connected to other battery strings 100, and these two electrode leads are connected to the junction box, which simplifies the process difficulty of confluence and lead wires and reduces production costs. At the same time, by connecting the battery strings 100 in series, the maximum output voltage can be obtained, the heat generated during operation can be reduced, and the reliability of component operation can be improved.

On the basis of the above-mentioned embodiments, in a specific implementation manner of the present invention, the bus bar is a bus bar that uses the conductive glue and soldering tape. The bus bar used in the process of connecting the lead wires from the battery string 100 to the junction box can be a bus bar made of ordinary soldering tape, or a bus bar made of conductive glue, or part of the soldering tape Add some conductive glue to make bus bars. The use cost of conductive adhesive and welding strip is different, and the process difficulty of making bus bars is different. In actual operation, different bus bars should be used in combination with process difficulty and production cost.

In summary, during the manufacturing process of the solar module structure, the main grid of the front electrode of the battery sheet is directly contacted and laminated with the back electrode, thereby eliminating the need to use solder ribbons to connect the front side of the battery sheet. With the back side, the usage amount of the solder ribbon of the module is reduced, the shading area is reduced, the welding process is simplified, the manufacturing cost of the module is reduced, the utilization efficiency of the sunlight irradiating the solar module structure is improved, and the power of the module is improved.

The structure of the solar module provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (7)

1. A solar module structure, characterized in that it includes a battery sheet, wherein, the front side of the battery sheet is provided with a front electrode, and the back side is provided with a back electrode, and the front electrode includes a main electrode arranged on the left edge of the battery sheet. Grid, the back electrode is located at the right edge of the battery sheet and is parallel to the main grid, multiple battery sheets are stacked and connected by the main grid and back electrode of adjacent battery sheets to form a battery string , the adjacent battery strings are connected to each other. 2 . The solar module structure according to claim 1 , wherein the main grids and the back electrodes of adjacent solar cells are bonded together by conductive glue. 3 . 3 . The solar module structure according to claim 2 , wherein the battery string comprises 2 to 15 battery pieces. 4 . 4. The solar module structure according to claim 3, wherein the number of the battery strings is an even number. 5 . The solar module structure according to claim 4 , wherein the battery slices at the same position of the adjacent battery strings are placed in opposite directions, and the adjacent battery strings are connected by bus bars. 6 . 6 . The solar module structure according to claim 5 , further comprising a junction box, and the main grid and the back electrode that are not stacked in the battery string are connected to the junction box using a bus bar. 7 . 7 . The solar module structure according to claim 6 , wherein the bus bar is a bus bar that uses the conductive adhesive and a welding ribbon. 7 .