Interconnection strip interconnection method

Abstract

The invention relates to the field of photovoltaic technology, in particular to an interconnection strip interconnection method, which comprises the following steps of: printing insulation paste on the surface of a battery piece, drying and curing, printing solder paste, drying and curing, paving a pre-cut and bent solder strip above the battery piece, and arranging an insulation strip; placing an interconnection strip between the insulating strip and the end part of the welding strip; according to the method, during welding, the interconnection strips are arranged in the edges of the battery strings, the area utilization rate of the module is improved, and compared with a traditional method, the power of the module can be improved on the premise that the area of the module is not changed.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to an interconnection method for interconnecting strips. Background Technology

[0002] The existing interconnection method involves directly welding the interconnection strips to the outside of the battery string. This results in some areas of the module not being fully covered by the battery cells after the battery string is packaged into a module, which reduces the area utilization rate.

[0003] There is an urgent need for a new interconnection method to improve the utilization rate of component area. Summary of the Invention

[0004] The purpose of this invention is to provide an interconnection method for interconnecting strips, which aims to improve the area utilization of the encapsulated components after interconnection.

[0005] To achieve the above objectives, the present invention provides a method for interconnecting interconnected strips, comprising the following steps; Insulating adhesive is printed onto the surface of the solar cell, dried and cured, then solder paste is printed, dried and cured, and pre-cut and bent solder strips are laid on top of the solar cell, and insulating strips are laid. Place the interconnecting strip between the insulating strip and the end of the solder strip; The bent portion of the welding strip is pressed down to make full contact with the interconnecting strip, and the welding strip and the interconnecting strip are welded at high temperature.

[0006] The bending of the welding strip needs to be done at a position 15-20mm from the end of the welding strip.

[0007] The interconnecting strip is positioned above the insulating strip and below the end of the solder strip.

[0008] This invention discloses an interconnection method for battery cells, which involves printing insulating adhesive onto the surface of the battery cell, drying and curing it, then printing solder paste, drying and curing it, and laying pre-cut and bent solder ribbons on top of the battery cell, followed by the placement of insulating strips. Interconnection strips are then placed between the insulating strips and the ends of the solder ribbons. The bent portions of the solder ribbons are pressed down to ensure full contact with the interconnection strips, and the solder ribbons and interconnection strips are welded at high temperature. This method, during welding, places the interconnection strips inside the edge of the battery string, improving the module area utilization rate. Compared to traditional methods, it can increase module power without changing the module area. Attached Figure Description

[0009] To make the technical solution and advantages of this application clearer, the embodiments of this application will be described in further detail below.

[0010] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0011] It should be noted that all information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in this application have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the strain data, acceleration data, displacement data, pressure data, and video data involved in this application were all obtained with full authorization.

[0012] Figure 1 This is a flowchart of an interconnection method for interconnecting strips provided by the present invention.

[0013] Figure 2 This is a schematic diagram of the bending device.

[0014] Figure 3 yes Figure 2 A magnified view of detail A.

[0015] Figure 4 This is a schematic diagram of interconnecting strips placed on the battery cells.

[0016] Figure 5 This is a schematic diagram of interconnecting strips welded onto the battery cells.

[0017] In the diagram: 1-upper bending knife, 2-wire feeding groove plate, 3-pressure claw, 4-pressure claw base plate, 5-cylinder, 6-battery cell, 7-insulating strip, 8-insulating glue, 9-welding strip, 10-lower bending knife, 11-interconnecting strip. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] Please see Figures 1 to 5The present invention provides a method for interconnecting interconnected strips, comprising the following steps; S1 prints insulating adhesive 8 on the surface of the battery cell, dries and cures it, then prints solder paste, dries and cures it, and lays the pre-cut and bent solder strip 9 on top of the battery cell 6, and lays the insulating strip 7. In this embodiment of the invention, the bending of the welding strip 9 requires a bending device, which is mainly completed by a bending knife. The bending knife is divided into an upper bending knife 1 and a lower bending knife 10, each with an inclined surface. The angle between the inclined surface of the upper bending knife 1 and the horizontal plane is equal to the angle between the inclined surface of the lower bending knife 10 and the horizontal plane. The bending device also includes a wire feeding groove plate 2, a pressure claw 3, and a pressure claw base plate 4. The upper bending knife 1 can move left and right, the lower bending knife 10 can move up and down, and the pressure claw 3 can move up and down and left and right. All these movements are driven by a cylinder 5. Before the welding strip 9 is placed on the wire feeding groove plate 2, the upper bending knife 1 and the pressure claw 3 move left and right to avoid a gap. After the welding strip 9 is placed on the wire feeding groove plate 2, the upper bending knife 1 and the pressure claw 3 move to the wire pressing position, and the pressure claw 3 moves down to press the welding strip 9 firmly onto the pressure claw base plate 4, thus constraining the welding strip 9. Then the lower bending blade 10 pushes upward, and the inclined surface of the lower bending blade 10 pushes the 15-20mm long part of the end of the welding strip 9 to the inclined surface of the upper bending blade 1, thereby achieving the bending of the end of the welding strip 9.

[0020] S2 places the interconnecting strip 11 between the insulating strip 7 and the end of the welding strip 9; S3 presses down the bent portion of the welding strip 9 to make full contact with the interconnecting strip 11, and welds the welding strip 9 and the interconnecting strip 11 at high temperature.

[0021] The above-disclosed embodiments are merely preferred embodiments of the interconnection method of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A method for interconnecting interconnected strips, characterized in that, Includes the following steps; Insulating adhesive is printed onto the surface of the solar cell, dried and cured, then solder paste is printed, dried and cured, and pre-cut and bent solder strips are laid on top of the solar cell, and insulating strips are laid. Place the interconnecting strip between the insulating strip and the end of the solder strip; The bent portion of the welding strip is pressed down to make full contact with the interconnecting strip, and the welding strip and the interconnecting strip are welded at high temperature.

2. The interconnection method as described in claim 1, Its characteristics are: The welding strip bending process needs to be performed at a position 15~20mm from the end of the welding strip.

3. The interconnection method of claim 1, characterized in that... ； The interconnecting strip is positioned above the insulating strip and below the end of the solder strip.

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