CN206820719U - A photovoltaic junction box pad and junction box - Google Patents

Abstract

The utility model discloses a kind of photovoltaic junction box pad and terminal box, pad upper surface at least side is provided with projection.A kind of photovoltaic junction box pad of the present utility model, it effectively can be coated to the welding position of busbar, lifted the welding quality of busbar and pad, avoided rosin joint.Terminal box of the present utility model, using the above-mentioned pad being improved to welding position, stability and the life-span of photovoltaic module can be significantly improved.

Description

A photovoltaic junction box pad and junction box

technical field

The utility model belongs to the technical field of photovoltaic component manufacturing, in particular to a photovoltaic junction box pad and a junction box.

Background technique

With the continuous development of photovoltaic technology, solar cell products, which are semiconductor devices that convert solar energy into electrical energy, have been rapidly developed. Photovoltaic junction box is a very critical component in photovoltaic modules. It is an electrical connection component that connects the battery array in a solar photovoltaic module with the electrical equipment or the battery array in another solar photovoltaic module. Its function is to connect the solar photovoltaic The current and voltage generated by the entire column of cells in the module is conducted to the external channel. The basic structure of a photovoltaic junction box generally includes a box body, a box cover, terminal blocks, diodes, wires, connectors, etc., among which the terminal blocks are used as carriers for electrical connection with the lead wires (bus bars) of photovoltaic modules, and are generally pressed and tightened. Contact with the bus bar by physical means or welding.

For the junction box that is connected to the bus bars of the solar cells by welding, the quality of welding between the bus bars and the terminal directly affects the reliability and life of the photovoltaic module. Poor welding may cause high temperature at the welding place, forming Fire hazard.

Welded terminals usually consist of a metal sheet and a pad set on the metal sheet, as shown in Figure 1. In order to increase the reliability of welding and reduce poor welding quality, it is common practice to pre-add solder to the pad, such as As shown in Figure 2, the solder added therein is generally in the form of a droplet-like curved surface due to the natural shape after being heated, melted and cooled.

When the bus bar of the solar module is soldered to the pad of the terminal, the bus bar is directly placed on the top surface above the solder layer of the pad, that is, the lower surface of the bus bar is in contact with the top surface of the upper surface of the solder layer, and then the surface plating of the bus bar is melted by heating. Tin and solder on the terminal pad or additional solder wire makes the connection between the bus bar and the terminal and solder, as shown in Figure 3. However, since the solder on the pad below the bus bar or the additional solder wire is difficult to form a good coating on the bus bar after melting, false soldering often occurs, and the stability and life of the photovoltaic module are affected. influences.

Contents of the invention

In view of this, in order to overcome the defects of the prior art, the purpose of this utility model is to provide a photovoltaic junction box welding pad, which can effectively cover the welding part of the bus bar, and improve the welding quality of the bus bar and the welding pad , to avoid virtual soldering, thereby improving the stability and life of photovoltaic modules.

In order to achieve the above object, the utility model adopts the following technical solutions:

A photovoltaic junction box soldering pad, comprising a soldering pad, at least one side of the upper surface of the soldering pad is provided with a protrusion.

Preferably, the protrusions are provided on corresponding two sides of the upper surface of the pad, and the protrusions and the upper surface of the pad form a groove for accommodating a bus bar to be welded.

More preferably, the upper surface of the pad also has a bar connecting the protrusion.

Further preferably, the protrusion and/or the bar is solder or integrally formed with the pad.

More preferably, the surface of the groove and/or the bus bar is preset with solder.

More preferably, the width of the groove matches the width of the bus bar.

Further preferably, the groove has a width of 3-12 mm.

More preferably, the height of the protrusion matches the thickness of the bus bar.

Further preferably, the height of the protrusion is 0.3-6mm.

The utility model also provides a junction box, which includes the above-mentioned welding pad.

Compared with the prior art, the utility model is beneficial in that: a photovoltaic junction box welding pad of the utility model can effectively cover the welding part of the bus bar and improve the welding of the bus bar and the welding pad. Quality, avoid false welding. The junction box of the utility model adopts the above-mentioned pads with improved welding parts, which can obviously improve the stability and service life of the photovoltaic module.

Description of drawings

Fig. 1 is the perspective view of the photovoltaic junction box when the pads are not soldered in the prior art;

Fig. 2 is the perspective view of the photovoltaic junction box when soldering pads are added in the prior art;

Fig. 3 is a perspective view of a photovoltaic junction box after bus bar welding is completed in the prior art;

Fig. 4 is the perspective view of the photovoltaic junction box when not welding in embodiment one;

Fig. 5 is the enlarged view of part I in Fig. 4;

6 is a perspective view of the photovoltaic junction box after welding is completed in Embodiment 1;

Figure 7 is an enlarged view of Part II in Figure 6;

Fig. 8 is the perspective view of the photovoltaic junction box when it is not welded in the second embodiment;

Fig. 9 is an enlarged view of part III in Fig. 8;

Fig. 10 is a perspective view of the photovoltaic junction box after welding is completed in Embodiment 2;

Fig. 11 is an enlarged view of part IV in Fig. 10;

Figure 12 is a perspective view of the photovoltaic junction box when it is not welded in Embodiment 3;

Fig. 13 is a perspective view of the photovoltaic junction box during welding in embodiment three;

Fig. 14 is an enlarged view of part V in Fig. 13;

Among them: photovoltaic junction box-1, terminal block-2, pad-3, groove-4, protrusion-5, solder-6, bus bar-7, opening-8, shell-9, bar-10 .

detailed description

Preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

Referring to Figures 4 to 7, a photovoltaic junction box welding pad in this embodiment, the upper surface of the welding pad 3 is provided with a groove 4 for accommodating the bus bar 7 to be welded, the groove 4 is adapted to the bus bar 7, and the groove 4 includes the bottom surface of the groove and the protrusions 5 located on both sides of the bottom surface of the groove. In this embodiment, the upper surface of the pad 3 also has a bar 10 connecting the protrusion 5 , and the protrusion 5 and the bar 10 are integrally formed with the pad 3 .

The width of the groove 4 matches the width of the bus bar 7 and is 3-12 mm; the height of the protrusion 5 matches the thickness of the bus bar 7 and is 0.3-6 mm. The surface of the groove 4 and the bus bar 7 is preset with solder to better cover the bus bar 7 for better welding.

This embodiment also provides a junction box 1 , including the pad 3 of the photovoltaic junction box as described above, the connection terminal 2 connected to the pad 3 and the housing 9 for supporting and protecting. The photovoltaic junction box is provided with an opening 8 through which the bus bar 7 passes.

Embodiment two

Referring to Figures 8 and 11, a photovoltaic junction box welding pad of this embodiment is basically the same as that of Embodiment 1, the difference is that: the photovoltaic junction box welding pad 3 in this embodiment adopts the conventional welding pad 3 of the prior art, in Solder 6 is preset on the surface, and the solder 6 forms a groove 4 for accommodating the bus bar 7. The groove 4 matches the bus bar 7. The groove 4 includes a bottom surface of the groove and protrusions 5 located on both sides of the bottom surface of the groove. The bumps 5 are made of solder 6 .

The width of the groove 4 matches the width of the bus bar 7 and is 3-12 mm; the height of the protrusion 5 matches the thickness of the bus bar 7 and is 0.3-6 mm.

Embodiment three

Referring to Figures 12 and 14, a junction box pad of this embodiment is provided with a protrusion 5 on one side of the upper surface of the pad 3, and the protrusion 5 can be integrally formed with the pad 3, or the preset solder 6 It is set in the form of bumps 5 , and the preset solder 6 is set in the form of bumps 5 in this embodiment. The height of the protrusion 5 matches the thickness of the bus bar 7 and is 0.3-6mm.

In a specific implementation and application, the two protrusions can be integrally formed with the pad or formed with solder, or one of them can be integrally formed with the pad while the other is formed with solder. When there is only one protrusion, the position of the protrusion is not limited, and can be changed according to actual needs, such as being arranged on the left, right or upper side of the bus bar. The height and width of the protrusions are set as required.

The utility model relates to a welding pad of a photovoltaic junction box, which can effectively cover the welding part of the bus bar, improve the welding quality of the bus bar and the welding pad, and avoid false welding. The junction box of the utility model adopts the above-mentioned pads with improved welding parts, which can obviously improve the stability and service life of the photovoltaic module.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model, and its purpose is to allow those familiar with this technology to understand the content of the present utility model and implement it accordingly, and cannot limit the protection scope of the present utility model. Equivalent changes or modifications made according to the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims (10)

1. a kind of photovoltaic junction box pad, including pad, it is characterised in that：The pad upper surface at least side is provided with convex Rise.

A kind of 2. photovoltaic junction box pad according to claim 1, it is characterised in that：The pad upper surface corresponds to both sides It is provided with the projection, the raised groove that receiving busbar to be welded is formed with the pad upper surface.

A kind of 3. photovoltaic junction box pad according to claim 2, it is characterised in that：The upper surface of the pad also has Connect the raised shelves bar.

A kind of 4. photovoltaic junction box pad according to claim 3, it is characterised in that：Described raised and/or described shelves bar It is integrally formed for scolding tin or with the pad.

A kind of 5. photovoltaic junction box pad according to claim 2, it is characterised in that：The groove and/or busbar Surface programming has scolding tin.

A kind of 6. photovoltaic junction box pad according to claim 2, it is characterised in that：The width of the groove and the remittance The width of stream bar matches.

A kind of 7. photovoltaic junction box pad according to claim 6, it is characterised in that：The width of the groove be 3 ~ 12mm。

A kind of 8. photovoltaic junction box pad according to claim 2, it is characterised in that：The raised height and the remittance The thickness of stream bar matches.

A kind of 9. photovoltaic junction box pad according to claim 8, it is characterised in that：The raised height be 0.3 ~ 6mm。

A kind of 10. terminal box, it is characterised in that：Including the pad as described in any one in claim 1-9.