CN215342633U

CN215342633U - Battery piece maintenance subsides for photovoltaic module

Info

Publication number: CN215342633U
Application number: CN202121203038.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Dingsenmao Technology Co ltd
Current assignee: Wuxi Dingsenmao Technology Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-28
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a cell maintenance patch for a photovoltaic module, which relates to the technical field of photovoltaics and comprises a base material and a plurality of conductive strips arranged on the surface of the base material, wherein the conductive strips are arranged on the surface of the base material at intervals in parallel, and each conductive strip is respectively parallel to and corresponds to a thin grid line on the surface of a cell to be maintained; when the battery piece maintenance paste covers the crack on the surface of the battery to be maintained, each conducting bar on the surface of the battery piece maintenance paste coincides with each thin grid line on the crack and correspondingly covers the area of the same thin grid line on the two sides of the crack, so that the alignment of the thin grid lines and the conducting bars can be quickly and conveniently realized, the reconnection of the circuit is realized at each breakpoint of the thin grid lines, the reconstruction of the function is realized, and a foundation is provided for the maintenance of the battery piece with low cost, high efficiency, quickness and convenience.

Description

Battery piece maintenance subsides for photovoltaic module

Technical Field

The utility model relates to the technical field of photovoltaics, in particular to a cell piece maintenance patch for a photovoltaic module.

Background

With the rising of energy prices, the development and utilization of new energy is a major subject of research in the energy field today. Because solar energy has the advantages of no pollution, no regional limitation, inexhaustibility and the like, the research on solar power generation becomes a main direction for developing and utilizing new energy, and the solar photovoltaic module is a main mode for using solar energy by people at present. The solar photovoltaic module is characterized in that a cell piece in the solar photovoltaic module is made of a silicon wafer material, the thickness of the cell piece is only 0.16-0.2 mm, the cell piece is brittle and is easy to crack or break under pressure, a welding strip and the cell piece need to be pressed and welded in the series welding process, the cell piece is easy to crack, and subsequent equipment can forcefully act on the cell piece in the processes of sucking a cell string, manually welding a bus bar, laying a back film and a back backboard and is also easy to damage the cell piece, so that the cell piece is easy to crack or subfissure in the processing process of the solar photovoltaic module. At present, with the increasingly complex design of a photovoltaic structure, the battery piece is cut, the cutting surface is easy to crack, the operation action is more and more fine, the process of the solar photovoltaic module is more and more rigorous, the one-time yield of the current half-piece module EL detection is about 80% -90%, and therefore a large number of bad modules need to be maintained in the processing process.

The conventional maintenance scheme aiming at the cracks of the battery piece has the following problems: the conventional maintenance scheme is to replace and treat the battery plates with cracks or hidden cracks, which greatly wastes labor cost and also wastes the battery plates. The manual work has certain chance to cause secondary damage to photovoltaic module in the maintenance process, destroys the battery piece in other places, and cost of maintenance increases. And with the occurrence of a plurality of MBB main grids of the battery plate, the number of welding grid lines on one battery plate is gradually increased from 166 BB 6 to 9BB or more, if abnormal welding occurs to the battery plate, a repair requirement occurs, manual actions required based on a conventional repair concept are large at the moment, the probability of failure of the repair process is increased, and potential negative cycles occur. And after the battery piece cracked, along with follow-up transportation and installation vibration, increased battery piece crack length, positive silver thick liquid can break off, and the electric current of fracture department can't be collected, and inside oneself consumes, leads to battery piece department temperature rise, and local overheat causes glued membrane material rapid aging, and the sclerosis can't effectively protect the battery piece, causes the aggravation of battery piece crack, and then influences whole photovoltaic module circuit.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cell piece maintenance patch for a photovoltaic module aiming at the problems and the technical requirements, and the technical scheme of the utility model is as follows:

a cell piece maintenance paste for a photovoltaic module is matched with a cell piece to be maintained with cracks for use, and comprises a base material and a plurality of conductive strips arranged on the surface of the base material, wherein the plurality of conductive strips are arranged on the surface of the base material at intervals in parallel, and each conductive strip is respectively parallel and corresponding to a thin grid line on the surface of the cell to be maintained; when the battery piece maintenance paste covers the crack of the surface of the battery to be maintained, each conducting bar on the surface of the battery piece maintenance paste is respectively superposed with each thin grid line of the crack and correspondingly covers the area of the same thin grid line on the two sides of the crack.

The further technical scheme is that the cross section of each conductive strip is any one of a circle, a semicircle, an oval, a semi-oval and a rectangle.

The further technical scheme is that a back glue layer is further arranged on the surface of the base material, and the cell piece maintenance paste is attached to the surface of the cell piece to be maintained through the back glue layer and fixes the areas on two sides of the crack of the cell piece to be maintained.

The further technical proposal is that the base material is transparent, and the conductive strips are fixed on the base material or can be separately arranged on the base material.

The further technical proposal is that the base material is non-transparent, and the conductive strips are arranged on the base material in a separable way.

The beneficial technical effects of the utility model are as follows:

the application discloses battery piece maintenance subsides for photovoltaic module, this battery piece maintenance subsides have the equidistant busbar of making in advance, can realize quick counterpoint and the operation of the thin grid line of the crackle department of waiting to maintain the battery piece, utilize this battery piece maintenance to paste surperficial busbar, can let every breakpoint of thin grid line all realize the reconnection of circuit, realize the reestablishment of function, low-cost and high efficiency, it is swift and convenient.

Based on the battery piece maintenance subsides disclosed in this application, can realize the maintenance with battery piece maintenance subsides direct attached in the damaged department of battery piece, can need not to dismantle the battery piece, for reducing the artifical maintenance degree of difficulty, improve maintenance efficiency and provide technical basis, reduce artifical secondary damage to the subassembly, simple process, fast have overcome conventional repair technology and battery piece figure grid line factors such as many.

Drawings

Fig. 1 is a schematic top view of a battery repair patch disclosed in the present application.

Fig. 2 is a schematic side view of a battery repair patch according to the present disclosure.

Fig. 3 is a schematic view of a cell repair sticker attached to a crack of a cell to be repaired.

Fig. 4 is a schematic diagram of alignment and coincidence of a conductive strip and a corresponding thin grid line at a crack of a battery piece to be repaired in the battery piece repairing paste disclosed in the present application.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

The application discloses battery piece maintenance subsides for photovoltaic module, this battery piece maintenance subsides use with the battery piece cooperation of waiting to maintain that has the crackle, please refer to fig. 1 and 2, this battery piece maintenance subsides include substrate 1 and set up a plurality of busbar 2 on substrate 1 surface, and a plurality of busbar 2 set up at substrate 1 surface parallel interval. And each conducting bar 2 is respectively parallel corresponding to the thin grid line on the surface of the battery to be maintained. Alternatively, each conductive bar 2 has a cross section of any one of a circle, a semicircle, an ellipse, a semi-ellipse, and a rectangle. The conductive strip 2 can be implemented by silver paste and conductive materials such as tin-lead alloy, tin-bismuth alloy and other alloy materials. The battery piece maintenance paste can be manufactured by adopting a direct printing mode and directly performing screen printing forming on a pattern based on a battery piece.

When the cell repair paste covers the crack 4 on the surface of the cell 3 to be repaired, the attaching schematic diagram refers to fig. 3, the dashed-line frame region is the region where the cell repair paste is located, one side of the conductive strip 2 on the surface of the cell repair paste contacts with the cell 3 to be repaired, and the conductive strip 2 on the cell repair paste is manufactured in advance according to the structure of the fine grid line, so that the alignment with all the fine grid lines 5 in the region where the crack 4 of the cell 3 to be repaired is located can be quickly realized, and each conductive strip 2 on the surface of the cell repair paste is respectively superposed with each fine grid line on the crack, and correspondingly covers the regions of the same fine grid line on two sides of the crack, as shown in fig. 4. Then through treating the crackle department on maintenance battery surface and heating, can maintain every busbar on the subsides with the battery piece and fuse rather than the coincidence crackle on maintenance battery surface to with the circuit intercommunication of crackle both sides, realize the maintenance, it is more excellent, the busbar adopts low temperature welding material, low temperature heating is with the welding of busbar and the thin grid line silver thick liquid on the battery piece, does not destroy original solder strip and battery piece welding effect. The specific fusing temperature is adjusted according to the melting characteristic of the alloy material on the conductive strip and the melting characteristic of the silver paste of the fine grid line.

Optionally, the surface of the base material 1 is also provided with a back glue layer on the same side of the conductive strip 2, and the cell piece maintenance sticker is attached to the surface of the cell piece to be maintained through the back glue layer, fixes the areas on the two sides of the crack of the cell piece to be maintained, and separates the cell piece to be maintained after lamination.

The cell repair patch disclosed in the present application may be a large-area cell repair patch, and in actual use, the cell repair patch with a suitable size of cracks may be cut out from the cell repair patch. In addition, the battery piece to be maintained, which is used in cooperation with the battery piece maintenance paste, can be a single-sided battery piece or a double-sided battery piece, and the same maintenance can be realized on the front side and the back side of the battery piece to be maintained by utilizing the battery piece maintenance paste.

In one embodiment, the substrate 1 in the cell repair sticker is transparent, and the conductive strip 2 is fixed on the substrate 1 or detachably disposed on the substrate 1. Then after utilizing the crackle of the battery piece of battery piece maintenance subsides waiting to maintain the battery piece to maintain, can directly laminate whole battery piece maintenance subsides in photovoltaic module, perhaps can also separate substrate 1 from busbar 2 back with the busbar structural lamination in photovoltaic module.

The manufacturing method of the cell repair sticker for the transparent substrate 1 can adopt a transparent material similar to a hot melt adhesive EVA type as the substrate, well control the crosslinking degree and the light transmittance of the EVA to be consistent with those of an EVA/POE packaging material packaged in a conventional photovoltaic module, manufacture a screen plate by utilizing a screen printing process and directly referring to the figures and the intervals of grid lines of the cell, and perform screen printing on the transparent substrate. The manufactured whole battery piece still has certain light transmittance when being maintained and pasted at normal temperature, and the printed thin grid line can be seen through light irradiation. In the actual operation process of the repair process, a small block is cut according to the size of the surface to be repaired, and the conductive surface and the battery piece are fixed and bonded through proper heating according to the corresponding patterns. The subsequent lamination process is further fit to form stable conductive performance. Because the transparent material, the light transmittance and the packaging material are nearly the same, and no obvious light transmittance difference exists after lamination, the front appearance of the repaired assembly is very close to the normal effect of the battery plate in the assembly.

In another embodiment, the substrate 1 in the cell repair patch is non-transparent, and the conductive strip 2 is detachably disposed on the substrate 1. After the cell repairing paste is used for repairing cracks of a cell to be repaired, the opaque base material 1 is separated from the conductive strip 2, and part of the cell repairing paste is structurally laminated in the photovoltaic module.

What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiment. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and concept of the present invention are to be considered as included within the scope of the present invention.

Claims

1. The cell piece maintenance paste for the photovoltaic module is characterized by being matched with a cell piece to be maintained with cracks for use, and the cell piece maintenance paste comprises a base material and a plurality of conductive strips arranged on the surface of the base material, wherein the plurality of conductive strips are arranged on the surface of the base material at intervals in parallel, and each conductive strip is parallel to and corresponds to a fine grid line on the surface of the cell to be maintained; when the battery piece maintenance paste covers the crack of the surface of the battery to be maintained, each conducting bar on the surface of the battery piece maintenance paste is respectively superposed with each thin grid line of the crack and correspondingly covers the area of the same thin grid line on the two sides of the crack.

2. The battery piece repairing sticker as claimed in claim 1, wherein each conductive strip has a cross section of any one of a circle, a semicircle, an ellipse, a semi-ellipse and a rectangle.

3. The battery piece maintenance sticker of claim 1, wherein a back adhesive layer is further arranged on the surface of the base material, and the battery piece maintenance sticker is attached to the surface of the battery piece to be maintained through the back adhesive layer and fixes areas on two sides of the crack of the battery piece to be maintained.

4. The battery piece repair patch as claimed in any one of claims 1 to 3, wherein the base material is transparent, and the conductive strip is fixed on the base material or detachably disposed on the base material.

5. The battery piece repair patch according to any one of claims 1-3, wherein the base material is non-transparent, and the conductive strip is detachably disposed on the base material.