Solar cell modularized junction box convenient for glue filling

Abstract

The utility model discloses a solar cell modularized junction box convenient for glue pouring, which comprises an insulating body and two conducting strips, a diode chip is packaged in the insulating body, and the two conducting strips are respectively arranged on two sides of the insulating body and are respectively and electrically connected with the diode chip; the two conducting strips are respectively provided with a bus bar welding hole, and the bus bars penetrate through the bus bar welding holes and are welded on the conducting strips. One side, close to the insulation body, of the bus bar welding hole is provided with at least one zigzag shape. According to the utility model, the side edge of the bus bar welding hole is non-linear and forms an exhaust space layout, so that even if the bus bar abuts against the side edge, the bus bar welding hole cannot be blocked, and glue can still flow down from small holes generated by the sawteeth to fill the whole junction box.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar cells, and in particular relates to a modular junction box for solar cells, in particular to a modular junction box for solar cells which is convenient for glue filling. Background Art

[0002] The modular junction box is the most commonly used solar cell junction box in recent years. It includes an insulating body and two conductive sheets. The insulating body is encapsulated with a diode chip. The two conductive sheets are arranged on both sides of the insulating body and are electrically connected to the diode chips respectively. Each of the two conductive sheets has a busbar welding hole for the busbar to pass through and be welded to the conductive sheet. For the structure of the modular junction box, please refer to the applicant's previous patent 2018100483607. The busbar welding hole in this technical solution is composed of the conductive sheet and the insulating body.

[0003] When the modular junction box is in use, the busbar needs to be passed through the busbar welding hole on site, then welded to the conductive sheet, and then the entire junction box is filled with glue. The busbar itself has a certain elasticity. After passing through the busbar welding hole, it needs to be stretched outward, that is, away from the insulating body, and welded; however, due to its own elasticity, it is still possible to bulge or swell inward, that is, the busbar may contact the inner side of the busbar welding hole. In this case, when the glue is poured, the space in the junction box that is lower than the busbar welding hole and between the two busbar welding holes cannot be filled with glue, that is, the phenomenon of glue filling voids occurs. Summary of the invention

[0004] The utility model aims to overcome the above-mentioned defects and provide a solar cell modular junction box which is convenient for glue filling.

[0005] To this end, the technical solution adopted by the utility model is as follows: a modular junction box for solar cells that is easy to fill with glue, including an insulating body and two conductive sheets, a diode chip is encapsulated in the insulating body, the two conductive sheets are arranged on both sides of the insulating body, and are electrically connected to the diode chips respectively; each of the two conductive sheets has a busbar welding hole for allowing the busbar to pass through and be welded to the conductive sheet; it is characterized in that: the busbar welding hole is close to one side of the insulating body and has at least one serrated shape.

[0006] Furthermore, the busbar welding hole is composed of a conductive sheet and an insulating body, and the insulating body has at least one groove, so that the busbar welding hole forms a serrated shape.

[0007] Furthermore, the busbar welding hole is formed with 2-3 serrations.

[0008] The essence of the utility model is that the side of the busbar welding hole is non-linear, forming a spatial layout for exhaust, so that even if the busbar abuts against the side, the busbar welding hole will not be blocked, so that the glue can still flow down from the small holes produced by the sawtooth and fill the entire junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0010] Figure 2 yes Figure 1 A three-dimensional view of the central wiring module.

[0011] Figure 3 yes Figure 1 Top view of the central wiring module.

[0012] Figure 4 It is a top view of a wiring module in the prior art. DETAILED DESCRIPTION

[0013] See the attached drawings. A junction module is installed in the junction box 1, and the junction module includes an insulating body 2 and two conductive sheets 3. An elongated busbar welding hole 23 is formed between the insulating body and the conductive sheets. The busbar 4 passes through the busbar welding hole 23, extends outward and flattens, and is welded and fixed to the conductive sheets. There are two grooves 21 on the side of the insulating body, so that the busbar 4 will not fit with the insulating body, and the grooves 21 become ventilation holes between the two.

[0014] And in Figure 4 In the embodiment, the side of the insulating body is a straight line, and the welding hole 230 is a standard rectangle, so the bus bar can be inserted into and fit against the inner side.

Claims

1. A modular junction box for solar cells that is easy to glue-fill, comprising an insulating body and two conductive sheets, wherein a diode chip is encapsulated in the insulating body, and the two conductive sheets are arranged on both sides of the insulating body and are electrically connected to the diode chips respectively; each of the two conductive sheets has a busbar welding hole for allowing the busbar to pass through and be welded to the conductive sheet; the characteristics are: The busbar welding hole has at least one sawtooth shape on one side close to the insulating body.

2. The solar cell modular junction box that is easy to fill with glue as claimed in claim 1, characterized in that: The busbar welding hole is composed of a conductive sheet and an insulating body. The insulating body is provided with at least one groove, so that the busbar welding hole is formed into a sawtooth shape.

3. The solar cell modular junction box that is easy to fill with glue as claimed in claim 1 or 2, characterized in that: The busbar welding hole is formed with 2-3 serrations.

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