CN203312346U - Solar cell module - Google Patents

Abstract

The utility model relates to the crystalline silicon solar cell technology field, and especially relates to a solar cell module. The solar cell module comprises a plurality of rows of cell strings, each row of the cell strings is formed by a plurality of cell sheets in series connection, and main grid lines of a front electrode of a cell sheet is vertical to a rear electrode of another cell sheet, wherein the two cell sheets are positioned between two adjacent rows of the cell strings and used for cascading the two rows of the cell strings. The solar cell module is relatively high in output power, low in production cost, and high in production efficiency.

Description

solar cell module

technical field

The utility model relates to the technical field of crystalline silicon solar cells, in particular to a solar cell assembly.

Background technique

The solar battery module is mainly composed of many rows of battery strings connected in series, and each row of battery strings is formed by connecting a plurality of battery sheets 1' in series. The back electrode 4' of the technical cell 1' is located directly below the front electrode busbar 3', and the connecting ribbon 2' covers the front electrode busbar 3' and the back electrode 4' during welding. In other words, from the top view of each battery piece 1', the connection ribbon 2', the front electrode busbar 3', the battery piece 1', the back electrode 4', and the connection ribbon 2' are viewed from top to bottom. On the same vertical line, as shown in FIG. 2 , the connection ribbon 2' is connected from the front electrode busbar 3' of one cell 1' to the back electrode 4' of another cell 1', and the connection continues in sequence. The connecting ribbons 2' of columns and rows are all arranged in parallel, that is, the connecting ribbons 2' on one row of battery strings cannot be connected to the connecting ribbons 2' on another row of battery strings, so that two adjacent rows of battery strings For series connection, a bus bar ribbon 5' must be added between each adjacent two rows of battery strings to connect each adjacent two rows of battery strings together. As shown in Figure 3, the solar cell module has three rows of battery strings, three The rows of battery strings are arranged in parallel, and each row of battery strings is provided with three battery slices 1' connected in series. The back electrode 4' of the battery sheet is connected by a bus bar ribbon 5', and the front electrode busbar 3' of the battery sheet at the upper end of the battery string in the second row is connected to the back electrode 4 of the battery sheet at the upper end of the battery string in the third row. 'Connect via bus bar ribbon 5'.

After adding the bus bar ribbon, there are the following problems: firstly, there will be power loss on the bus bar ribbon, which reduces the output power of the solar cell module; Welding bus bar ribbon reduces production efficiency.

Utility model content

The technical problem to be solved by the utility model is to provide a solar cell module with higher output power, lower production cost and higher production efficiency.

The technical scheme adopted in the utility model is: a solar battery module, including multiple rows of battery strings, each row of battery strings is formed by connecting multiple battery sheets in series, and the front side of the battery sheet is provided with a front electrode main grid line. There is a back electrode on the back of the battery sheet, and the back electrode of the battery sheet is located directly below the busbar of the front electrode, and the surfaces of the busbar of the front electrode and the back electrode are covered with connecting ribbons. The connecting ribbon on the main grid line of the front electrode between the adjacent battery sheets is connected with the connecting ribbon on the back electrode, and the two adjacent battery strings are used to connect the two battery strings in series. A battery sheet is defined as a first battery sheet and a second battery sheet, the front electrode busbar of the first battery sheet and the connecting ribbon are perpendicular to the back electrode and the connecting ribbon, and the back electrode of the second battery sheet and the connection ribbon is perpendicular to the front electrode busbar and the connection ribbon, and the front electrode busbar and the connection ribbon of the first cell are perpendicular to the front electrode busbar and the connection ribbon of the second cell, The back electrode and connecting ribbon of the first battery slice are connected to the front electrode main grid lines and connecting ribbons of adjacent battery slices in the battery string where the first battery slice is located, and the front electrode of the first battery slice is mainly The grid lines and connecting ribbons are connected to the back electrodes and connecting ribbons of the second battery slice, and the front electrode busbars and connecting ribbons of the second battery slice are connected to the adjacent batteries in the battery string where the second battery slices are located. The back electrode of the chip and the connection ribbon are connected.

Compared with the prior art by adopting the above structure, the utility model has the following advantages: the two battery strings are connected through the first battery piece and the second battery piece, so that there is no need to connect the two battery strings through the bus bar welding strip, The current of each battery string flows directly to the following battery strings without power loss on the bus bar ribbon, which improves the output power of the module and reduces production costs. working hours and increased productivity.

Description of drawings

FIG. 1 is a schematic structural view of a battery sheet in the prior art.

FIG. 2 is a schematic diagram of a connection structure of a connecting ribbon between two battery sheets in the prior art.

Fig. 3 is a schematic structural diagram of a solar cell module in the prior art.

Fig. 4 is a structural schematic diagram of two battery slices used for connecting two battery strings in series in two adjacent battery strings in the solar battery module of the present invention.

Fig. 5 is a structural schematic diagram of a specific embodiment 1 of the solar cell module of the present invention.

Fig. 6 is a schematic structural diagram of a second embodiment of the solar cell assembly of the present invention.

As shown in the figure: 1', the battery sheet of the prior art; 2', the connecting ribbon of the prior art; 3', the front electrode busbar on the battery sheet of the prior art; 4', the battery sheet of the prior art The back electrode; 5', the bus bar welding strip of the prior art; 1, the battery sheet of the present utility model; 2, the connecting welding strip of the present utility model; 3, the busbar of the front electrode on the battery sheet of the present utility model; 4. The back electrode on the battery sheet of the present invention; 6. The first battery sheet; 7. The second battery sheet.

Detailed ways

The utility model is further described below in conjunction with the accompanying drawings and specific embodiments, but the utility model is not limited to the following specific embodiments.

As shown in Figure 5: it is a 3*3 solar cell module, that is, there are three rows of battery strings, and each row of battery strings consists of three cells 1, and the cell at the top of the first row of cell strings from right to left is the first A battery sheet 6, its front electrode busbar 3 is perpendicular to the back electrode 4, and because the front electrode busbar 3 and the back electrode 4 are covered with the connecting ribbon 2, so the front electrode of the first battery sheet 6 The connecting ribbon 2 on the main grid line is perpendicular to the connecting ribbon 2 on the back electrode, and the battery slice at the top of the second row of battery strings from right to left is the second battery slice 7, and its front electrode busbar 3 It is perpendicular to the back electrode 4, and because the front electrode busbar 3 and the back electrode 4 are covered with the connecting ribbon 2, the connecting ribbon 2 on the front electrode busbar of the second cell 7 is connected to the back electrode. The connecting ribbons 2 are vertical, and the front electrode busbars 3 of the first cell 6 are perpendicular to the front electrode busbars 3 of the second cell 7, and because the front electrode busbars 3 are covered with connection Therefore, the connecting ribbon 2 on the front electrode busbar 3 of the first battery sheet 6 is perpendicular to the connecting ribbon 2 on the front electrode busbar 3 of the second battery sheet 7 . The back electrode 4 of the first battery piece 6 is connected to the front electrode busbar 3 of the battery piece 1 adjacent to the battery string where the first battery piece 6 is located through the connecting ribbon 2, that is, it covers the The connecting ribbon 2 on the front electrode busbar 3 of the second battery piece from top to bottom in the first column of battery strings from right to left and the connecting ribbon 2 covering the back electrode 4 of the first battery piece 6 Connection, the front electrode busbar 3 of the first battery sheet 6 is connected to the back electrode 4 of the second battery sheet 7 through the connection ribbon 2, that is, the connection ribbon on the front electrode busbar 3 of the first battery sheet 6 2 is connected to the connecting ribbon 2 on the back electrode 4 of the second battery piece 7, the busbar 3 of the front electrode of the second battery piece 7 is adjacent to the second battery piece 7 on the battery string where the second battery piece 7 is located The back electrode 4 of the battery sheet is connected by the connecting ribbon 2, that is, the connecting ribbon 2 covering the busbar 3 of the front electrode of the second battery sheet 7 and the battery string covering the third column from the right to the left are connected from the top. Connect the connection ribbon 2 on the back electrode 4 of the second battery piece from the bottom. The battery slice at the bottom of the second row of battery strings from right to left is the first battery slice 6, and the battery slice at the bottom of the third row of battery strings from right to left is the second battery slice 7. The structures and connection methods of the battery sheet 6 and the second battery sheet 7 are the same as above.

As shown in Figure 6: it is a 4*4 solar cell module, that is, there are 4 rows of battery strings, each row of battery strings consists of 4 cells, and the battery at the bottom of the first row of battery strings from right to left is The first battery sheet 6, its front electrode busbar 3 is perpendicular to the back electrode 4, and because the front electrode busbar 3 and the back electrode 4 are covered with the connecting ribbon 2, so the front of the first battery sheet 6 The connecting ribbon 2 on the electrode main grid line is perpendicular to the connecting ribbon 2 on the back electrode; the battery slice at the bottom of the second row of battery strings from right to left is the second battery slice 7, and its front electrode main grid The line 3 is perpendicular to the back electrode 4, and because the front electrode busbar 3 and the back electrode 4 are covered with the connecting ribbon 2, the connecting ribbon 2 on the front electrode busbar of the second cell 7 is connected to the back electrode. The connecting ribbons 2 on the electrodes are vertical, and the front electrode busbars 3 of the first cell 6 are perpendicular to the front electrode busbars 3 of the second cell 7, and because the front electrode busbars 3 are covered Therefore, the connecting ribbon 2 on the front electrode busbar 3 of the first battery sheet 6 is perpendicular to the connecting ribbon 2 on the front electrode busbar 3 of the second battery sheet 7 . The back electrode 4 of the first battery piece 6 is connected to the front electrode busbar 3 of the battery piece 1 adjacent to the battery string where the first battery piece 6 is located through the connecting ribbon 2, that is, it covers the Counting from right to left, the first row of battery strings, counting from top to bottom, the connecting ribbon 2 on the front electrode busbar 3 of the third battery piece is connected to the connecting ribbon 2 covering the back electrode 4 of the first battery piece 6 , the front electrode busbar 3 of the first battery sheet 6 is connected to the back electrode 4 of the second battery sheet 7 through the connecting welding strip 2, that is, the connecting welding strip covered on the front electrode busbar 3 of the first battery sheet 6 The ribbon 2 is connected to the connecting ribbon 2 covered on the back electrode 4 of the second battery slice 7, and the busbar 3 of the front electrode of the second battery slice 7 is connected to the battery string where the second battery slice 7 is located. 7. The back electrodes 4 of adjacent battery sheets are connected by the connecting ribbon 2, that is, the connecting ribbon 2 covering the busbar 3 of the front electrode of the second battery sheet 7 is covered with the battery strings in the second column from right to left. The connecting ribbon 2 on the back electrode 4 of the third cell from top to bottom is connected. The battery slice at the top of the second battery string from right to left is the first battery slice 6, the battery slice at the top of the third battery string from right to left is the second battery slice 7, and the third battery slice from right to left The battery slice at the bottom of the row of battery strings is the first battery slice 6, and the battery slice at the bottom of the battery string in the fourth row from right to left is the second battery slice 7. The first battery slice 6 and the second battery slice 7 The structure and connection method are the same as above.

Claims (1)

1. A solar cell module, including multiple rows of battery strings, each row of battery strings is formed by connecting multiple battery sheets (1) in series, and the front side of the battery sheet is provided with a front electrode bus bar (3), and the battery sheet A back electrode (4) is provided on the back, and the back electrode (4) of the battery sheet (1) is located directly below the front electrode busbar (3), and the front electrode busbar (3) is connected to the back electrode ( The surface of 4) is covered with connecting ribbons (2), and the connecting ribbons (2) on the main grid line of the front electrode between the adjacent battery sheets (1) of each battery string are connected with the connecting ribbons (2) on the back electrode. Belt (2) connection, characterized in that: the two battery slices used to connect the two battery strings in series between the two adjacent battery strings are defined as the first battery slice (6) and the second battery slice (7), the front electrode busbar (3) and the connecting ribbon (2) of the first cell (6) are perpendicular to the back electrode (4) and the connecting ribbon (2), and the second cell (7) The back electrode (4) and the connecting ribbon (2) are perpendicular to the front electrode busbar (3) and the connecting ribbon (2), and the front electrode busbar of the first cell (6) (3) and the connecting ribbon (2) are perpendicular to the front electrode busbar (3) and the connecting ribbon (2) of the second cell (7), and the back electrode (4) of the first cell (6) ) and the connecting ribbon (2) are connected to the front electrode main grid line (3) and the connecting ribbon (2) of the adjacent battery piece (1) in the battery string where the first battery piece (6) is located. The front electrode busbar (3) and connecting ribbon (2) of a cell (6) are connected to the back electrode (4) and connecting ribbon (2) of a second cell (7), and the second battery The front electrode busbar (3) and the connecting ribbon (2) of the sheet (7) are connected to the back electrode (4) and the connecting ribbon of the adjacent battery sheet (1) in the battery string where the second battery sheet (7) is located. with (2) connections.

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