CN201435392Y

CN201435392Y - Solar cell interconnector

Info

Publication number: CN201435392Y
Application number: CN 200920156681
Authority: CN
Inventors: 王赟; 汪义川
Original assignee: Wuxi Suntech Power Co Ltd
Current assignee: Wuxi Suntech Power Co Ltd
Priority date: 2009-06-17
Filing date: 2009-06-17
Publication date: 2010-03-31
Anticipated expiration: 2019-06-17

Abstract

The utility model discloses a solar cell interconnector which is provided with a plurality of through holes, wherein the through holes can be in a symmetrical shape, such as a circle, lozenge or hexagon; the plurality of through holes are evenly arranged on the interconnector in rows; and an acute angle is formed between a connecting line of central points of the plurality of through holes which are arranged in rows and the edge of the interconnector. The solar cell interconnector has the beneficial effects that: when in welding, heat can be better transferred to a welding position; and afterwelding, tapping range is utilized to release deformation stress, thus being capable of reducing the bending of a cell slice after welding the interconnector.

Description

The solar cell interconnector

Technical field

The utility model relates to solar module and makes field, particularly a kind of solar cell interconnector.

Background technology

In the manufacture process of solar module, need to adopt the solar cell interconnector that a plurality of battery sheets are connected and/or are together in parallel, thereby form some battery strings.Interconnector generally is zinc-plated copper strips, is welded in respectively on the main grid line of adjacent cell sheet positive and negative electrode.Solar cell piece is easy to generate bending after manual welding, regular meeting's injury extra to battery strings because of this reason causes in stacked lamination operation.

The battery sheet is that too big (for example, the thermal coefficient of expansion of interconnector is about 16.5 for interconnector and silicon chip thermal expansion coefficient difference in main cause crooked behind the solder interconnections bar; The thermal coefficient of expansion of silicon chip is about 2.6).Because thermal coefficient of expansion is: α=Δ V/ (V* Δ T), Δ V is the change of the object volume under the variations in temperature Δ T of giving in the formula, V is an object volume.Absorb same heat at battery sheet weld interconnector and silicon chip, but expansion and contraction separately will differ about 6 times of volumes, so cause bending easily.In order to reduce the flexibility of battery sheet behind the solder interconnections bar, except reducing welding temperature, can also realize this effect by existing interconnector is retrofited.Fig. 1 shows in the prior art improvement to the interconnector structure.As shown in the figure, interconnector 1 ' is carried out fold handle and reduce it on non-pad, but, adopt this structure to have a negative impact the welding pulling force because interconnector 1 ' self is in uneven thickness because of the flexible bending stress that produces of being heated.

The utility model content

The purpose of the utility model embodiment is, a kind of solar cell interconnector is provided, and it can reduce the bending of battery sheet behind the solder interconnections bar.

For solving the problems of the technologies described above, embodiment of the present utility model provides a kind of solar cell interconnector, has a plurality of through holes on the described interconnector.

As preferably, described through hole can be symmetric shape.

As further preferred, described through hole can be circle, rhombus or regular hexagon.

As preferably, described a plurality of through holes in a row are evenly arranged on the described interconnector.

As further preferred, in an acute angle between the line of the central point of a plurality of through holes of described arrangement in a row and the limit of described interconnector.

As preferably, the gross area of described a plurality of through holes is 3: 8 with the ratio of the gross area of described interconnector.

The utility model embodiment has following beneficial effect at least: reduced the heat of interconnector overall absorption, heat can be transmitted to weld better during welding; Utilize the perforate scope that distortional stress is discharged after the welding, thereby can reduce the bending of battery sheet behind the solder interconnections bar.

Description of drawings

Fig. 1 is the schematic perspective view of the solar cell interconnector of prior art;

Fig. 2 to Fig. 6 is the front schematic view of the solar cell interconnector of the utility model embodiment.

Main description of reference numerals

1 interconnector, 2 through holes

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

The utility model improves to reduce the bending of battery sheet behind the solder interconnections bar the structure of interconnector.Fig. 2 to Fig. 6 is the front schematic view of the solar cell interconnector of the utility model embodiment.As shown in the figure, have a plurality of through holes 2 on the interconnector 1.Through hole 2 can be various symmetric shapes such as circle, rhombus, hexagon, and the shape of through hole 2 also can be asymmetrical shape certainly.A plurality of through holes 2 in a row are evenly arranged on the interconnector 1.In a row can be in an acute angle between the limit of the line of the central point of a plurality of through holes 2 of arranging and interconnector 1.As shown in Figure 6, the angle α that forms between the long limit of the line of the central point of a plurality of through holes 2 and interconnector 1 is 30 °.The gross area of a plurality of through holes 2 can be 1: 3 to 2: 3, preferably 3: 8 with the ratio of the gross area of interconnector 1.

According to the utility model, by punching on interconnector 1, on the one hand, reduced the heat of interconnector 1 overall absorption, heat can be transmitted to weld better during welding; On the other hand, utilize the perforate scope that distortional stress is discharged (contraction of through hole after for the interconnector expanded by heating leaves the space) after the welding, thereby can reach the purpose that reduces the bending of battery sheet behind the solder interconnections bar.

The above only is a part preferred embodiment of the present utility model, and all equivalent arrangements of being done according to the utility model claim change, all in protection range of the present utility model.

Claims

1, a kind of solar cell interconnector is characterized in that, has a plurality of through holes on the described interconnector.

2, solar cell interconnector according to claim 1 is characterized in that, described through hole is a symmetric shape.

3, solar cell interconnector according to claim 2 is characterized in that, described through hole is circle, rhombus or regular hexagon.

4, solar cell interconnector according to claim 1 is characterized in that, described a plurality of through holes in a row are evenly arranged on the described interconnector.

5, solar cell interconnector according to claim 4 is characterized in that, and is in an acute angle between the line of the central point of a plurality of through holes of described arrangement in a row and the limit of described interconnector.

6, solar cell interconnector according to claim 1 is characterized in that, the gross area of described a plurality of through holes is 1: 3 to 2: 3 with the ratio of the gross area of described interconnector.

7, solar cell interconnector according to claim 6 is characterized in that, the gross area of described a plurality of through holes is 3: 8 with the ratio of the gross area of described interconnector.