CN203325918U - Solar battery assembly with low packaging power loss - Google Patents

Abstract

The utility model is a solar cell module with low encapsulation power loss, which comprises a plurality of battery strings and bus bars connected to the battery strings. There are at least four grid wire electrodes, and each grid wire electrode on the front and back two cells is connected in series through interconnection bars, and each grid wire electrode on the battery cells at both ends of the battery string is connected to the bus through the correspondingly connected interconnection bars. The strips are connected. The utility model can reduce the loss of electric power on the interconnection strips by increasing the number of interconnection strips by adding grid wire electrodes on the battery sheet, and the power loss on the interconnection strips is greater than that due to the increase in the number of interconnection strips The power reduction caused by the reduction of the light-receiving area of the battery sheet increases the overall photoelectric conversion efficiency of the solar cell module. And it can realize a safer and more reliable electrical connection of the cells, effectively improve the reliability of the components, and is suitable for industrial applications.

Description

Solar cell modules with low packaging power loss

technical field

The utility model relates to a solar photovoltaic technology, in particular to a solar cell assembly with low encapsulation power loss.

Background technique

Solar energy is a clean, efficient and inexhaustible new energy source. It is one of the important renewable energy sources. In solar energy applications, photovoltaic power generation is one of the important ways of solar energy applications. It is noiseless, maintenance-free, and emission-free. The advantages are gradually gaining popularity. At present, crystalline silicon solar cells are the mainstay of photovoltaic power generation. The current high conversion efficiency is an important development trend of crystalline silicon solar cell components. On the one hand, the conversion efficiency of components can be improved by improving the conversion efficiency of cells; on the other hand , after the cells are packaged into components, there will be a certain degree of packaging power loss, of which more than 90% of the loss is caused by the interconnection bars connecting the cells, and with the higher the efficiency of the cells and the greater the operating current , the greater the power loss on the interconnection bar. the

At present, the photovoltaic industry generally uses three-grid cells. The surface and back of the cells are connected by three interconnecting bars. Taking the conventional polycrystalline 60-cell module as an example, the power loss on the interconnecting bars is about 7W-9W, the resulting packaging loss is about 3%.

Contents of the invention

The technical problem to be solved by the utility model is to provide a module structure with a reasonable structure design, which can effectively reduce the power loss of the solar cell module on the interconnection bar and improve the overall conversion efficiency of the module, aiming at the deficiencies of the prior art.

The technical problem to be solved by the utility model is achieved through the following technical solutions. The utility model is a solar cell assembly with low packaging power loss, which includes a plurality of battery strings and bus bars connecting the battery strings. The battery strings It is composed of multiple cells connected in series, and its characteristics are: each cell is provided with at least four grid wire electrodes on the front and back sides respectively, and each grid wire electrode on the front and rear two cells is connected in series one by one through interconnection strips , each gate wire electrode on the battery slices at both ends of the battery string is connected to the bus bar through a correspondingly connected interconnection bar.

The technical problems to be solved by the utility model can be further realized through the following technical solutions, the interconnection strips have a width of 0.8mm-1.4mm and a thickness of 0.15mm-0.3mm.

Compared with the prior art, the utility model can reduce the loss of electric power on the interconnection strips by increasing the grid line electrodes on the battery sheet, thereby correspondingly increasing the number of interconnection strips, and the reduced power loss on the interconnection strips is greater than The power reduction caused by the reduction of the light-receiving area of the cell due to the increase in the number of interconnected strips improves the overall photoelectric conversion efficiency of the solar cell module. And it can realize a safer and more reliable electrical connection of the cells, effectively improve the reliability of the components, and is suitable for industrial applications.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The specific technical solutions of the utility model will be further described below with reference to the accompanying drawings, so that those skilled in the art can further understand the utility model without constituting a limitation on the rights thereof.

Embodiment 1, with reference to accompanying drawing 1, a kind of solar cell assembly of low encapsulation power loss, comprises a plurality of battery strings and the bus bar 1 that connects battery strings, and described battery string is formed by a plurality of battery pieces 3 connected in series, each piece The front and back sides of the battery sheet 3 are respectively provided with at least four grid wire electrodes 4, and each grid wire electrode 4 on the front and back two battery sheets 3 is connected in series one by one through the interconnection bar 2, and the battery sheets 3 at both ends of the battery string are connected in series. Each gate line electrode 4 is connected to the bus bar 1 through a correspondingly connected interconnection bar 2 , and the width of the gate line electrode 4 is smaller than the width of the interconnection bar 2 .

During production, the positive and negative electrodes of the front and rear battery slices 3 are welded and connected through the interconnection bar 2, and so on to realize the connection between a string of battery slices 3 to form a battery string, and then connect the battery slices 3 at both ends of the battery string. The extended end of the interconnection bar 2 is connected with the bus bar 1, so as to complete the electric power output of the whole module.

Embodiment 2. In the solar cell assembly with low packaging power loss described in Embodiment 1, the interconnection strip 2 has a width of 0.8mm-1.4mm and a thickness of 0.15mm-0.3mm.

Claims (2)

1. A solar cell assembly with low encapsulation power loss, comprising a plurality of battery strings and bus bars connecting the battery strings, the battery string is formed by connecting a plurality of battery slices in series, and it is characterized in that: the front and back of each battery slice There are at least four grid wire electrodes on both sides respectively, and each grid wire electrode on the front and rear two battery sheets is connected in series one by one through interconnection bars, and each grid wire electrode on the battery cells at both ends of the battery string is connected through corresponding interconnection bars connected to the bus bar. 2. The solar battery module with low packaging power loss according to claim 1, characterized in that: the width of the interconnection strip is 0.8mm-1.4mm, and the thickness is 0.15mm-0.3mm.

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