CN212210946U

CN212210946U - Single-polarity modularized solar cell split type junction box

Info

Publication number: CN212210946U
Application number: CN202021445094.0U
Authority: CN
Inventors: 王薇珲; 蒋文; 王洪昌
Original assignee: Zhejiang Jiaming Tomorrow Heyuan Photovoltaic Technology Co ltd
Current assignee: Zhejiang Jiaming Tomorrow Heyuan Photovoltaic Technology Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2020-12-22
Anticipated expiration: 2030-07-21

Abstract

The utility model discloses a split type terminal box of unipolar modularization solar cell, including box body, lid, bottom, electric conductor and diode, the upper end of box body is the open end, and lid demountable installation is on the bottom, and bottom demountable installation is in the bottom surface of box body, and electric conductor fixed mounting is on the bottom plate, and the integration has a diode on the electric conductor, the utility model discloses with electric conductor and a diode integrated as an organic whole, help reducing the space of diode and occupy the volume.

Description

Single-polarity modularized solar cell split type junction box

Technical Field

The utility model belongs to the technical field of the terminal box, concretely relates to split type terminal box of unipolar modularization solar cell.

Background

The solar photovoltaic cell is a device for directly converting solar radiation energy into electric energy, and the photovoltaic module is a product formed by connecting a plurality of photovoltaic cells in series and parallel and then packaging, and is a basic unit in a photovoltaic power generation system. The solar cell junction box is a key device for introducing electric energy generated by a solar photovoltaic cell into a power supply system.

At present, the power of a photovoltaic module is increased more and more, the voltage and the current are increased along with the power, higher requirements are put on junction boxes, and in order to reduce the operation risk of a power station, the junction temperature of the junction boxes of the module with high power is required to be increased.

To this end, the applicant discloses a split type junction box of a solar photovoltaic module (application number CN2019223919574), which comprises a shell, a bottom cover, a conductor and diodes, wherein the bottom cover is detachably mounted at the bottom in the shell, the two diodes are welded on the conductor in series, the conductor is fixed on the surface of the bottom cover, one side of the shell is provided with a wire inlet hole, a pressing block used for pressing a cable extending into the shell is arranged in the wire inlet hole, and the upper part of the shell is connected with a box cover through a buckle. The utility model discloses mainly having solved the terminal box that is suitable for high-power multiunit cluster subassembly, having changed the terminal box into split type structure, can effectively increase the rated current of terminal box, have two diodes in every terminal box simultaneously, be divided into two with the big voltage of original every group cluster, improve the safety in utilization of terminal box, exist when this split type terminal box of solar PV modules is used following not enoughly:

1. the two diodes occupy large space and have low integration level.

2. When the box is used for a long time, the temperature in the box body is higher.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a split type terminal box of unipolar modularization solar cell, through the structure that changes the diode and the connected mode of diode and electric conductor, the space occupation volume of reducible diode.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a split type terminal box of unipolar modularization solar cell, has open-ended box body and lid including the upper end and fits the box body open-ended lid, the bottom surface demountable installation of box body has the bottom, fixed mounting has the electric conductor on the bottom, the integration has a diode on the electric conductor.

In order to better implement the above solution, preferably, the electronic device further includes a heat sink, and the heat sink is installed between the inner wall of the box body and the electric conductor.

Preferably, the lower end of the heat sink is abutted against the bottom cover, and the upper end of the heat sink is abutted against the box cover.

Preferably, the heat dissipation fins are two and respectively arranged between two sides of the electric conductor and the inner wall of the box body.

Preferably, the heat sink is an aluminum sheet.

Preferably, pouring sealant is poured between the radiating fins and the inner wall of the box body.

Preferably, the heat sink is in contact with the electrical conductor, the diode.

Preferably, a wire inlet hole is formed in a side plate of the box body, a cable electrically connected with the positive electrode or the negative electrode of the electric conductor penetrates through the wire inlet hole, and a pressing block used for pressing the cable is arranged in the wire inlet hole.

Preferably, the bottom plate and the bottom cover of the box body are provided with guide holes coaxially used for connecting the confluence plate.

Preferably, a plurality of installation fixing ribs are arranged on the bottom cover, fixing holes matched with the installation fixing ribs are formed in the electric conductor, and the electric conductor is fixedly connected with the bottom cover in a mode that the fixing holes and the installation fixing ribs are inserted and matched.

The utility model has the advantages that:

the single-polarity modularized solar cell split type junction box is suitable for a plurality of groups of high-power serial assemblies, the junction box adopts a split type structure, the rated current of the junction box can be effectively increased, and each junction box is internally provided with a diode, so that the occupied volume is small; the radiating fins are arranged in the junction box, so that the temperature of a single junction box can be effectively reduced, and the use safety of the junction box is improved.

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. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is an external view (connected to a negative electrode) of a split junction box of a single-polarity modular solar cell provided in this embodiment;

fig. 2 is an external view (connected to the positive electrode) of a split junction box of a single-polarity modular solar cell provided in this embodiment;

fig. 3 is an external view of the single-polarity modular solar cell split junction box according to this embodiment (connected in series with fig. 1 and fig. 2);

FIG. 4 is an exploded view of FIG. 1;

FIG. 5 is a schematic view of a portion of the components of FIG. 4;

FIG. 6 is a schematic view of the cartridge of FIG. 4;

reference numerals: the box body 1, the upper buckle 101, the lower buckle 102, the box cover 2, the first buckle groove 201, the bottom cover 3, the guide hole 301, the mounting fixing rib 302, the second buckle groove 303, the electric conductor 4, the fixing hole 401, the diode 5, the radiating fin 6, the cable 7, the pressing block 8 and the pouring sealant 9.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 6, a single-polarity modular solar cell split junction box includes a box body 1, a box cover 2, a bottom cover 3, a conductor 4, a diode 5 and a heat sink 6.

As shown in fig. 1, the upper end of the case body 1 is an open end, the case cover 2 is detachably mounted on the bottom cover 3, the bottom cover 3 is detachably mounted on the bottom surface of the case body 1, the electric conductor 4 is fixedly mounted on the bottom plate, and the electric conductor 4 is integrated with a diode 5.

The split type junction box of the single-polarity modularized solar cell provided by the embodiment is beneficial to reducing the space occupation of the diode by adopting the diode integrated on the conductor.

As shown in fig. 1, the heat sink 6 is arranged between the inner wall of the box body 1 and the conductor 4, so that the junction temperature of the junction box can be effectively reduced, and the safety of the junction box in use is improved.

In the embodiment, the heat sink 6 is an aluminum sheet, which has low cost and good heat dissipation performance, the lower end of the heat sink 6 abuts against the bottom cover 3, and the upper end of the heat sink 6 abuts against the box cover 2, so that the area of the heat sink 6 can be increased, and the heat dissipation efficiency of the heat sink 6 can be further increased.

In this embodiment, the heat dissipation fins 6 are two fins and are respectively disposed between two sides of the electrical conductor 4 and the inner wall of the box body 1, and the heat dissipation effect can be further increased by increasing the number of the heat dissipation fins 6.

In the present embodiment, the heat sink 6 is in contact with the conductor 4 and the diode 5, whereby the heat dissipation efficiency can be improved, and the heat sink 6 is preferably of a flap type because the shapes of the conductor 4 and the diode 5 have irregularities.

In this embodiment, the potting adhesive 9 is filled between the heat sink 6 and the inner wall of the case 1, and the potting adhesive 9 forms a waterproof adhesive layer for protecting the internal conductor 4 and the diode 5 from water and fixing the heat sink 6.

In this embodiment, a side plate of the box body 1 is provided with a wire inlet hole, a cable 7 electrically connected with the anode or cathode of the conductor 4 penetrates through the wire inlet hole, and a pressing block 8 for pressing the cable 7 is arranged in the wire inlet hole.

As shown in fig. 4 and 6, the bottom cover 3, the box cover 2 and the box body 1 are connected in a matching manner through a buckle and a slot. Specifically, the lower end of the side plate of the box body 1 is provided with a plurality of lower buckles 102, the upper end of the side plate of the box body is provided with a plurality of upper buckles 101, the box cover 2 is provided with a first catching groove 201 connected with the upper buckles 101 in a matching manner, the bottom plate is provided with a second catching groove 303 connected with the lower buckles 102 in a matching manner, and the structures of the upper buckles 101, the lower buckles 102, the first catching grooves 201 and the second catching grooves 303 are the same as the structures of the buckles and the catching grooves in the solar split type junction box disclosed in the background art.

As shown in fig. 3, in the present embodiment, the side plate of the box body 1 is provided with a handle integrated with the box body 1 for easy handling.

In this embodiment, the bottom plate and the bottom cover 3 of the case 1 are provided with the guiding holes 301 for coaxially connecting the bus bars, the number of the junction boxes can be determined by the number of the bus bars, and the assembly of any number of battery strings is flexible and convenient to install.

As shown in fig. 5, a plurality of mounting and fixing ribs 302 are disposed on the bottom cover 3, fixing holes 401 matched with the mounting and fixing ribs 302 are disposed on the conductive body 4, and the conductive body 4 is fixedly connected with the bottom cover 3 by inserting and matching the fixing holes 401 and the mounting and fixing ribs 302.

Specifically, four installation fixing ribs 302 are arranged at the corners of the top surface of the bottom cover 3, the fixing holes 401 and the installation fixing ribs 302 are arranged in a one-to-one correspondence manner, and the electric conductor 4 is fixedly connected with the bottom cover 3 in a matched manner through the four fixing holes 401 and the four installation fixing ribs 302.

The split junction box of the single-polarity modular solar cell provided by the embodiment is combined for use, and must comprise a junction box A connected with the negative pole through a cable 7, a junction box B connected with the positive pole through the cable 7 and at least one junction box C connected with the junction box in series, wherein the number of the junction boxes is determined according to the number of the junction plates.

In the description of the present invention, numerous specific details are set forth, however, it can be appreciated that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a split type terminal box of unipolar modularization solar cell which characterized in that: the portable electronic box comprises a box body (1) with an opening at the upper end and a box cover (2) covering the opening of the box body (1), wherein a bottom cover (3) is detachably mounted on the bottom surface of the box body (1), a conductive body (4) is fixedly mounted on the bottom cover (3), and a diode (5) is integrated on the conductive body (4).

2. The split junction box of claim 1, wherein: the box body is characterized by further comprising a radiating fin (6), wherein the radiating fin (6) is arranged between the inner wall of the box body (1) and the electric conductor (4).

3. The split junction box of claim 2, wherein: the lower end of the radiating fin (6) is abutted against the bottom cover (3), and the upper end of the radiating fin (6) is abutted against the box cover (2).

4. The split junction box of claim 3, wherein: the radiating fins (6) are two and are respectively arranged between two sides of the electric conductor (4) and the inner wall of the box body (1).

5. The split junction box of claim 4, wherein: the radiating fins (6) are aluminum sheets.

6. The split junction box of claim 4, wherein: pouring sealant (9) is poured between the radiating fins (6) and the inner wall of the box body (1).

7. The split junction box of claim 4, wherein: the radiating fin (6) is in contact with the conductor (4) and the diode (5).

8. The split junction box of claim 4, wherein: the side plate of the box body (1) is provided with a wire inlet hole, a cable (7) electrically connected with the anode or the cathode of the electric conductor (4) penetrates through the wire inlet hole, and a pressing block (8) used for pressing the cable (7) is arranged in the wire inlet hole.

9. The split junction box of claim 4, wherein: the bottom plate and the bottom cover (3) of the box body (1) are provided with guide holes (301) which are coaxially used for being connected with the confluence piece.

10. The split junction box of claim 3, wherein: the bottom cover (3) is provided with a plurality of installation fixing ribs (302), the electric conductor (4) is provided with a fixing hole (401) matched with the installation fixing ribs (302), and the electric conductor (4) is fixedly connected with the bottom cover (3) in a matched mode of inserting the installation fixing ribs (302) through the fixing hole (401).