CN214707646U

CN214707646U - Wiring device for solar photovoltaic module

Info

Publication number: CN214707646U
Application number: CN202121354413.1U
Authority: CN
Inventors: 丁齐颀; 黄健; 何晨旭; 徐伟智
Original assignee: Haining Astronergy Technology Co ltd; Chint Solar (Zhejiang) Co Ltd
Current assignee: Chint New Energy Technology Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-11-12
Anticipated expiration: 2031-06-17

Abstract

The utility model relates to a termination for photovoltaic module, include: the photovoltaic module comprises a connector (1), a connecting cable (2) and a lug structure body (3), wherein the length of the connecting cable (2) is adjustable, and the connector (1) is connected with the lug structure body (3) through the connecting cable (2), wherein the connector (1) is configured to be connected with an electrode of a photovoltaic module, and the lug structure body (3) is configured to be electrically connected with a photovoltaic module bus bar.

Description

Wiring device for solar photovoltaic module

Technical Field

The utility model relates to a solar photovoltaic technology specifically relates to a termination for photovoltaic module.

Background

In the existing solar photovoltaic system, a junction box is mostly adopted to connect a solar photovoltaic module and a bus bar or a busbar.

The current photovoltaic module can be generally divided into a whole module and a split module, wherein the adopted junction boxes are different, but the general principle is that diodes are used inside, and different junction box designs can be selected to match the module according to different arrangement of battery plates in the module.

Document CN205986763U discloses a terminal strip applied to a junction box of a photovoltaic module, wherein the functional content includes that the terminal strip includes a plurality of terminal portions arranged in sequence along a first direction and separated from each other, the shapes of the plurality of terminal portions are all different and the areas of the plurality of terminal portions are all different, the problem of heat dissipation inside the junction box is solved, but the terminal strip is installed in the junction box.

In addition, document CN102194896B also discloses a solar photovoltaic junction box assembly, wherein one end of the first conductive sheet is electrically connected to the external cable, and the other end of the first conductive sheet is electrically connected to the diode; one end of the second conducting strip is electrically connected with the diode, and the other end of the second conducting strip is used for being electrically connected with one electrode of the solar cell panel.

As mentioned above, these prior art junction boxes are complex in design and have many drawbacks. The extreme use of diodes, for example, greatly increases the cost of the photovoltaic module and the difficulty of manufacturing the junction box. Secondly, the heat dissipation problem in the junction box exists all the time, even if the junction box has good current passing performance, due to the heat dissipation problem, under the condition that the current continuously passes through, the diode can emit a large amount of heat, the working performance of the diode is affected, even the service life of the diode is affected, and even worse, the diode can be completely damaged. Moreover, diodes are very vulnerable to lightning strikes in photovoltaic power plants, and the volume of the junction box is often designed to be large for the purpose of heat dissipation.

Moreover, because the arch of terminal box body height carries out the process of transporting after the photovoltaic module packing, matches the thickness of frame, thereby the terminal box lid can have the surface of withstanding adjacent subassembly and produce apparent bursting damage risk.

SUMMERY OF THE UTILITY MODEL

Therefore, in the above background, a wiring device for a photovoltaic module is proposed, comprising: the photovoltaic module comprises a connector, a connecting cable and a lug structure body, wherein the length of the connecting cable is adjustable, the connector is connected with the lug structure body through the connecting cable, the connector is connected with an electrode of the photovoltaic module, and the lug structure body is electrically connected with a photovoltaic module bus bar.

Through according to the utility model provides a termination for photovoltaic module not only can solve in the terminal box diode short circuit, encapsulating, maintenance, installation and so on all aspects problem outside, can also reduce cost and improve the reliability. Specifically, the connector can be used in combination with various types of commercially available photovoltaic modules, and can be divided into a positive connector and a negative connector. The connecting cable can be understood as being constructed as a standard cable dedicated to the photovoltaic industry, and the length of the connecting cable can be determined according to actual design requirements.

Advantageously, the lug structure can be designed to comprise a lug structure body made of an insulating material, for example plastic, and a metal lug, for example a copper lug, for electrical connection to the photovoltaic module busbar, wherein the metal lug is designed to be electrically connected to a connection cable.

Advantageously, the lug structure body can be designed as a plastic sheet with an opening on one side and a projection on the other side, wherein the connection cable runs through the projection from top to bottom and extends up to the opening and is electrically connected to the metal connection lug there.

Advantageously, the tab structure body may have a thickness of 0.8 mm to 3 mm.

Advantageously, the projection can be wedge-shaped and have a height of 8 mm to 12 mm.

Advantageously, the metal lug can be designed such that one end is electrically connected to the connection cable running through the projection and the other end is fixed at the opening and can be electrically connected to the busbar.

Advantageously, the tab structure body may be configured as an adhesive face having an uneven irregular face on the bottom and having a depth of 0.1 mm to 0.2 mm.

Advantageously, the aperture of the apertured section may have an area of 1 to 2 square centimeters.

Advantageously, the lug structure body can be configured with a clamping groove on the bottom for clamping the metal connection piece.

Advantageously, the electrical connection may be achieved by riveting or welding.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description depict only some embodiments of the invention. These drawings are not intended to be limiting, but rather serve as illustrative examples of the invention. Wherein:

fig. 1 shows a schematic top view of a wiring lug according to an embodiment of the invention;

fig. 2 shows a schematic side view of a wiring lug according to an embodiment of the invention;

fig. 3 shows a schematic bottom view of a wiring lug according to an embodiment of the present invention; and

fig. 4 shows a schematic connection diagram of a wiring device and a photovoltaic module according to an embodiment of the present invention.

Detailed Description

Fig. 1 shows a schematic top view of a wiring lug 10 for a photovoltaic module according to an embodiment of the present invention. The wiring device 10 includes: a connector 1, a connection cable 2 and a lug structure 3, wherein the length of the connection cable 2 is adjustable, and the connector 1 is connected with the lug structure 3 via the connection cable 2, wherein the connector 1 is configured for connection with an electrode of a photovoltaic module, and the lug structure 2 is configured for electrical connection with a photovoltaic module busbar, which electrical connection can be achieved by riveting or welding. In this embodiment, the structure 3 comprises a lug structure body composed of plastic and a copper tab 4 for electrical connection with a photovoltaic module busbar, wherein the copper tab 4 is configured to be electrically connected with the connection cable 2, wherein the electrical connection can be achieved by riveting or welding. The copper connecting sheet 4 is only an example according to the invention, and for example aluminium or any other suitable metal connecting sheet 4 is conceivable.

As shown in fig. 1, the lug structure body is configured as a plastic sheet having an opening portion on one side and a protrusion portion on the other side, wherein the connection cable 2 penetrates the protrusion portion from top to bottom and extends up to the opening portion where it is electrically connected to the copper connection tab 4. According to the present embodiment, the tab structure body may have a thickness of 0.8 mm to 3 mm. The projection is designed in the form of a wedge and can have a height of 8 mm to 12 mm. According to the present embodiment, the hole of the opening part may have an area of 1 to 2 square centimeters. Further, the opening size of the tab structure 3 may be 1 cm square to 2 cm square. According to the present embodiment, the opening is square in shape, and the opening functions to facilitate welding of the bus bar and the copper connection piece 4 using a welding tool such as an electric soldering iron. Naturally other aperture shapes, such as circular or oval, are conceivable.

Fig. 2 shows a schematic side view of a wiring lug according to an embodiment of the invention.

The copper connection sheet 4 is electrically connected to the connection cable 2 penetrating the protruding portion at one end and is fixed to the opening portion at the other end so as to be electrically connected to the bus bar. Specifically, a locking groove 6 is formed in the bottom of the lug structure body, and the locking groove 6 is used for fixing the copper connecting piece 4 in a locking manner. As shown, the connecting cable 2 extends from top to bottom through the protruding portion and up to the opening portion, and the inner conductor of the end thereof, such as a copper wire, is welded or riveted with the copper connecting piece 4, and the reference numeral 5 shows the connecting point. The copper tabs 4, which are soldered or riveted to the connection cables 2, can then also establish an electrical connection with the busbars of the photovoltaic module, for example by riveting or soldering.

Fig. 3 illustrates a schematic underside view of a wiring lug in accordance with one embodiment of the present invention. It is clear from this that the lug structure body is constituted as an adhesive face having an uneven irregular face on the bottom and has a depth of 0.1 mm to 0.2 mm. In other words, the bottom of the main body of the lug structure is formed by irregular injection printing (corrugated shape as shown in fig. 3) with the depth of 0.1 mm to 0.2 mm, and the structural feature is to facilitate better adhesion when the lug structure 3 is connected with a photovoltaic module, such as adhesion.

Fig. 4 shows a schematic connection diagram of the wiring device 10 and the photovoltaic module 20 according to an embodiment of the present invention. Two wiring devices 10 are shown connected to the positive and negative poles of the photovoltaic module 20, respectively (e.g., the left wiring device 10 is connected to the positive pole of the photovoltaic module 20, while the right wiring device 10 is connected to the negative pole of the photovoltaic module 20). The plane of the drawing as shown in fig. 4 is the back side of the photovoltaic module 20.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It should be understood that the features disclosed in the above embodiments may be used alone or in combination, except where specifically noted. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Therefore, the invention disclosed herein is not to be limited to the particular embodiments disclosed, but is intended to cover modifications within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A wiring lug for a photovoltaic module, comprising: the photovoltaic module comprises a connector (1), a connecting cable (2) and a lug structure body (3), wherein the length of the connecting cable (2) is adjustable, and the connector (1) is connected with the lug structure body (3) through the connecting cable (2), wherein the connector (1) is configured to be connected with an electrode of a photovoltaic module, and the lug structure body (3) is configured to be electrically connected with a photovoltaic module bus bar.

2. The wiring device according to claim 1, wherein the tab structure (3) is configured to include a tab structure body composed of an insulating material and a metal tab (4) for electrical connection with a photovoltaic module bus bar, wherein the metal tab (4) is configured to be electrically connected with a connection cable (2).

3. The wiring device according to claim 2, characterized in that the lug structure body is constituted as a plastic sheet having an opening portion on one side and a protruding portion on the other side, wherein the connection cable (2) penetrates the protruding portion from top to bottom and extends up to the opening portion where it is electrically connected to the metal connection piece (4).

4. The wiring device according to claim 3, wherein the lug structure body has a thickness of 0.8 mm to 3 mm.

5. The wiring lug of claim 3, wherein the boss is wedge-shaped and has a height of 8 mm to 12 mm.

6. A wiring device according to claim 3, wherein the metallic connection piece (4) is configured such that one end is electrically connected to a connection cable (2) passing through the boss portion and the other end is fixed at the opening portion and electrically connectable to the bus bar.

7. The wiring device according to claim 1 or 2, characterized in that: the lug structure body is configured to have an uneven irregular surface on a bottom portion of an adhesive surface and to have a depth of 0.1 mm to 0.2 mm.

8. The wiring lug of claim 3, wherein the aperture of the aperture portion has an area of 1 to 2 square centimeters.

9. A wiring device according to claim 3, wherein the lug structure body is configured to have a catching groove (6) on the bottom for catching the metallic connecting lug (4).

10. A wiring device according to claim 1 or 2, characterized in that the electrical connection can be achieved by riveting or welding.