CN211880363U

CN211880363U - Photovoltaic junction box

Info

Publication number: CN211880363U
Application number: CN202020839555.6U
Authority: CN
Inventors: 杨松; 李俊超; 张良利; 吉芸娴; 沈道军; 石云
Original assignee: Zhejiang Astronergy New Energy Development Co Ltd
Current assignee: Zhejiang Astronergy New Energy Development Co Ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-11-06
Anticipated expiration: 2030-05-19

Abstract

The utility model provides a photovoltaic terminal box, including terminal box casing, anodal connector and negative pole connector, wherein: a plurality of conductive metal plates including a positive conductive metal plate and a negative conductive metal plate are arranged in the junction box shell, and bypass diodes are connected between the conductive metal plates; the junction box shell is provided with a first connecting hole and a second connecting hole, the negative connector is fixedly arranged in the first connecting hole and is electrically communicated with the negative conductive metal plate through a bare wire; the positive connector is arranged outside the junction box shell and is electrically communicated with the positive conductive metal plate through the photovoltaic cable penetrating through the second connecting hole. According to the photovoltaic junction box, the negative connector is integrally arranged on the junction box shell, so that the length of a photovoltaic cable is effectively reduced, the probability of arc discharge of the connector is reduced, the binding of the photovoltaic cable is effectively avoided, and the construction cost is reduced; meanwhile, the integrated negative electrode connector is high in strength, not prone to damage and long in service life.

Description

Photovoltaic junction box

Technical Field

The utility model relates to a solar photovoltaic terminal box technical field especially relates to a photovoltaic terminal box.

Background

Distributed photovoltaic power plant is along with policy support in recent years, obtains big development, and wherein various steel tile roof photovoltaic power plant occupies very big share, and various steel tile roof photovoltaic module nevertheless often adopts the mounting means of tiling, behind the line connection between the photovoltaic module, because the space is narrow and small, is difficult to the ligature fixed, if the joint ligature of photovoltaic connector is not firm, the overlap joint is on various steel tile roofing, and the contact of joint is not firm, can produce the arc, and then arouse that the heat preservation cotton fires under the various steel tile, has certain potential safety hazard. Moreover, the cables led out from the positive electrode and the negative electrode of the assembly at the same time are consistent in length, so that the waste of the cables of the assembly can be caused, the line loss is increased, and the discharge capacity is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a photovoltaic terminal box for avoid photovoltaic connector to produce the arc effect of drawing when reduction in production cost, photovoltaic terminal box includes terminal box casing, positive connector and negative connector, wherein:

a plurality of conductive metal plates including a positive conductive metal plate and a negative conductive metal plate are arranged in the junction box shell, and bypass diodes are connected between the conductive metal plates; the junction box shell is provided with a first connecting hole and a second connecting hole, the negative connector is fixedly arranged in the first connecting hole and is electrically communicated with the negative conductive metal plate through a bare wire; the positive connector is arranged outside the junction box shell and is electrically communicated with the positive conductive metal plate through a photovoltaic cable penetrating through the second connecting hole.

In specific implementation, the first connecting hole further comprises a heat insulation mechanism, and the heat insulation mechanism is arranged at the bottom of the first connecting hole.

In specific implementation, the heat insulation mechanism comprises a first heat insulation layer and a second heat insulation layer, and a gap is arranged between the first heat insulation layer and the second heat insulation layer.

In a specific implementation, the first connection hole and the second connection hole are disposed at the bottom of the junction box housing at intervals.

In a specific implementation, the first connection hole and the second connection hole are respectively disposed at two corners of the bottom of the junction box housing.

In a specific implementation, the photovoltaic junction box comprises four conductive metal plates.

The utility model provides a photovoltaic terminal box, including a terminal box casing, positive connector and the negative pole connector that has two connecting holes: the junction box shell is internally provided with a plurality of conductive metal plates including a positive conductive metal plate and a negative conductive metal plate, and bypass diodes are connected between the conductive metal plates; the negative electrode connector is fixedly arranged in a connecting hole and is electrically communicated with the negative electrode conductive metal plate through a bare wire; the positive connector is arranged outside the junction box shell and is electrically communicated with the positive conductive metal plate through a photovoltaic cable penetrating through the other connecting hole. According to the photovoltaic junction box, the negative connector is integrally arranged on the junction box shell, so that the length of a photovoltaic cable is effectively reduced, the probability of arc discharge of the connector is reduced, the binding of the photovoltaic cable is effectively avoided, and the construction cost is reduced; meanwhile, the negative electrode connector is high in strength and not easy to damage when pulled, so that the photovoltaic junction box is long in service life.

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 embodiments or the technical solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts. In the drawings:

FIG. 1 is a schematic view of a bottom-opening photovoltaic junction box according to an embodiment of the present invention;

FIG. 2 is a schematic view of the installation of an open-bottom photovoltaic junction box according to one embodiment of the present invention;

FIG. 3 is a schematic view of an open-corner photovoltaic junction box according to an embodiment of the present invention;

FIG. 4 is a schematic view of an installation of an open-corner photovoltaic junction box according to an embodiment of the present invention;

fig. 5 is a schematic back view of a photovoltaic module having a photovoltaic junction box according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the utility model provides a photovoltaic junction box for avoid photovoltaic connector to produce the arc discharge effect when reduction in production cost, photovoltaic junction box includes junction box casing 100, positive connector 300 and negative connector 200, wherein:

a plurality of conductive metal plates 130 including a positive conductive metal plate 131 and a negative conductive metal plate 132 are disposed inside the junction box housing 100, and a bypass diode 140 is connected between the conductive metal plates 130; the junction box housing 100 is provided with a first connection hole 110 and a second connection hole 120, the negative connector 200 is fixedly arranged inside the first connection hole 110, and is electrically communicated with the negative conductive metal plate 132 through a bare wire 210; the positive connector 300 is disposed outside the junction box housing 100 and is electrically connected to the positive conductive metal plate 131 through a photovoltaic cable 310 penetrating through the second connection hole 120.

In the implementation, the applicant chooses the negative connector 200 to be integrated with the junction box housing 100, mainly considering that the negative connector 200 has higher strength than the positive connector 300, and the photovoltaic cable 310 is less likely to be damaged by pulling when being connected.

In specific implementation, in order to prevent the negative connector 200 from generating high temperature and overheating during operation of the photovoltaic module and burning the junction box housing 100 and internal components thereof, the first connection hole 110 may further include a heat insulation mechanism disposed at the bottom of the first connection hole 110, so as to effectively block heat generated by the negative connector 200 and avoid an excessive temperature inside the junction box housing 100. Further, as shown in fig. 1 and 3, in order to effectively improve the heat insulation capability of the heat insulation mechanism, the heat insulation mechanism may include a first heat insulation layer 111 and a second heat insulation layer 112, and a gap is provided between the first heat insulation layer 111 and the second heat insulation layer 112.

In a specific implementation, the positions of the first connection hole 110 and the second connection hole 120 may be arranged in various embodiments. For example, as shown in fig. 1 and 2, the first connection hole 110 and the second connection hole 120 may be disposed at the bottom of the junction box housing 100 with a gap. For another example, as shown in fig. 3 and 4, in order to avoid bending of the photovoltaic cable 310 and facilitate connection of the junction boxes of adjacent photovoltaic modules, the first connection hole 110 and the second connection hole 120 may be respectively disposed at two corners of the bottom of the junction box housing 100.

In specific implementation, the conductive metal plate 130 inside the photovoltaic junction box can be provided in various embodiments. For example, as shown in fig. 1 and 3, the photovoltaic junction box may include four conductive metal plates 130.

In a specific implementation, as shown in fig. 5, a photovoltaic module having the photovoltaic junction box may be installed as follows:

the method comprises the following steps: a photovoltaic module with the photovoltaic junction box is installed on the boundary of the support, and a cable of a negative connecting wire is inserted in advance before installation.

Step two: and vertically placing the second photovoltaic module, and then splicing the positive connector of the first photovoltaic module with the negative connector of the second photovoltaic module.

Step three: slowly put the second piece photovoltaic module flat, prevent that the photovoltaic cable from dragging.

Step four: and (5) fastening the pressing block.

To sum up, the utility model provides a photovoltaic terminal box, including a terminal box casing 100, positive connector 300 and the negative pole connector 200 that has two connecting holes: the junction box housing 100 has a plurality of conductive metal plates 130 including a positive conductive metal plate 131 and a negative conductive metal plate 132 inside, and a bypass diode 140 is connected between the conductive metal plates 130; the negative connector 200 is fixedly disposed inside a connection hole and electrically connected to the negative conductive metal plate 132 through a bare wire 210; the positive connector 300 is disposed outside the junction box housing 100 and is electrically connected to the positive conductive metal plate 131 through a photovoltaic cable 310 penetrating another connection hole. According to the photovoltaic junction box, the negative connector 200 is integrally arranged on the junction box shell 100, so that the length of the photovoltaic cable 310 is effectively reduced, the probability of the arc discharge problem of the connector is reduced, the binding of the photovoltaic cable 310 is effectively avoided, and the construction cost is reduced; meanwhile, the cathode connector 200 is high in strength and not easy to damage when pulled, so that the photovoltaic junction box also has a long service life.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A photovoltaic junction box comprising a junction box housing (100), a positive connector (300), and a negative connector (200), wherein:

a plurality of conductive metal plates (130) including a positive conductive metal plate (131) and a negative conductive metal plate (132) are arranged in the junction box shell (100), and bypass diodes (140) are connected between the conductive metal plates (130); the junction box shell (100) is provided with a first connecting hole (110) and a second connecting hole (120), the negative connector (200) is fixedly arranged in the first connecting hole (110), and is electrically communicated with the negative conductive metal plate (132) through a bare wire (210); the positive connector (300) is arranged outside the junction box shell (100) and is electrically communicated with the positive conductive metal plate (131) through a photovoltaic cable (310) penetrating through the second connecting hole (120).

2. The photovoltaic junction box of claim 1, further comprising a thermal isolation mechanism in the first connection hole (110), the thermal isolation mechanism being disposed at a bottom of the first connection hole (110).

3. The photovoltaic junction box of claim 2, wherein the thermal insulation mechanism comprises a first insulating layer (111) and a second insulating layer (112), a gap being provided between the first insulating layer (111) and the second insulating layer (112).

4. The photovoltaic junction box of claim 1, wherein the first connection hole (110) and the second connection hole (120) are spaced apart from each other and disposed at a bottom of the junction box housing (100).

5. The photovoltaic junction box of claim 1, wherein the first connection hole (110) and the second connection hole (120) are respectively disposed at two corners of a bottom of the junction box housing (100).

6. The photovoltaic junction box of claim 1, comprising four of said conductive metal plates (130).