At present, the technology of laminated modules is becoming more and more mature. Conductive glue is used for interconnection between laminated cells and laminated cells, and welding strips are connected in series between small strings composed of multiple cells. Specifically, welding strips are welded on the most edge battery electrodes. , and then use the bus bar to collect the welding strips of each plate to draw out the positive and negative currents, so as to form a complete laminated assembly.

The welding tape used between the small strings is a tinned copper tape, and the tinned copper tape is bonded to the electrodes of the laminated battery. The current problem is that the welding tape itself has no adhesiveness, and the welding tape is Flux is used to achieve bonding, and the flux itself has a certain hardness. Therefore, once the welding tape falls off somewhere in the reliability test, it will spread to the left and right, and even a whole welding strip will fall off as a whole. Faced with this situation, now The technology is to use a long strip with a width of about 7mm and a length equal to the width of the battery, and punch holes at a fixed interval in the middle of the welding strip. This welding strip is called a perforated welding strip, as shown in Figure 1. The advantage of the punched ribbon is to facilitate the bending and folding of the ribbon and save the cost of the ribbon. However, in the reliability test of the laminated assembly, it is found that such a ribbon design has limitations, such as the ribbon is somewhere on the battery busbar. If it falls off, the damage point will spread to the left and right, and even a whole welding strip will fall off, resulting in large-area current loss and photovoltaic cell power drop.

Technical implementation elements:

In view of the above-mentioned defects or deficiencies in the prior art, the purpose of the present invention is to provide a strip-shaped welding strip, which solves the problem that the current welding strip is easy to fall off as a whole during reliability testing.

The utility model provides a bar-shaped welding belt, comprising:

The strip-shaped welding strip is continuously provided with a plurality of openings in the length direction,

The strip-shaped welding strips are also provided with a plurality of partially disconnected openings along the length direction, and the strip-shaped welding strips are integrally connected.

Further, each of the openings corresponds to one of the partially broken openings, and the plurality of partially broken openings are alternately arranged on both sides of the strip-shaped welding strip.

Further, the width of the partially broken opening is 0.1 mm to 0.5 mm.

Further, the partially disconnected opening is located at the connecting portion adjacent to the opening.

Further, each of the connecting parts of the adjacent openings is provided with a partial disconnection opening symmetrically up and down.

Further, the length of each partially broken opening on the connecting portion of the adjacent openings ranges from 1.8 mm to 2.2 mm, and the width ranges from 0.3 mm to 0.7 mm.

Further, a flexible welding tape is connected to the position of each of the partially disconnected openings by welding.

Further, the material of the flexible welding strip and the strip welding strip is the same.

Further, the thickness of the strip-shaped welding strip is 120 μm, and the thickness of the flexible welding strip is in the range of 20 μm to 50 μm.

Further, the shape of the opening is a rectangle.