A manufacturing method of high performance photovoltaic welding strip

Photovoltaic welding strip, also known as tinned copper strip or tinned copper strip, is used for the connection between photovoltaic module cells and plays an important role in conducting and collecting electricity. Welding strip is an important raw material in the welding process of photovoltaic modules such as solar panels. The quality of welding strip directly affects the current collection of photovoltaic modules and the concave convex of power, which has a great impact on the power of photovoltaic modules.

The existing solar cell modules present some high-efficiency modules, including diamond modules and laminated modules. The two components are connected by overlapping on the front of each battery, a few interconnection bars are selected at the marginal grid line on the back of the battery, and then the bus bars are welded with the outgoing interconnection bars on both sides of the back of the battery module. Compared with the conventional components, the two components reduce the addition of internal loss of the components caused by the connection of battery strips, and increase the conversion power of the components. However, due to the zero gap contact welding between the battery sheets of the two components, the phenomenon of thermal expansion and cold contraction will occur due to the change of temperature in the process of lamination and thermal cycle test, resulting in the hidden crack of the battery sheet and the deterioration of the cushioning capacity and reliability of the components, which will eventually lead to the substantial reduction of the actual effect and service life of the components.

The purpose of the utility model is to provide a high-performance photovoltaic welding belt, which solves the problems existing in the prior art that due to the change of pressure and temperature, the cells of diamond module and laminated module show the phenomenon of hidden crack of cells and the deterioration of buffer capacity and reliability of photovoltaic module, resulting in the significant reduction of power and service life of photovoltaic module.

In order to achieve the above intention, the utility model selects the following technical plan to complete.

A highperformance photovoltaic welding strip comprises a welding strip body, the welding strip body is provided with stripshaped through holes longitudinally arranged along its length direction, and transverse notches are respectively arranged on the edges on both sides of the welding strip body.

Preferably, the number of the strip-shaped through holes is a plurality, and the plurality of the strip-shaped through holes are arranged at equal intervals.

Preferably, a plurality of rows of the stripshaped through holes are arranged on the welding strip body, and the plurality of rows of the strip-shaped through holes are staggered and scattered.

Preferably, the strip-shaped through hole is one of a waist shaped hole or a rectangular hole.

Preferably, the notches are equidistant and staggered on the edges of both sides of the welding strip body.