CN102044571A - Junction box for solar photovoltaic module - Google Patents

Abstract

The invention relates to the field of electrical connectors. The solar photovoltaic module junction box includes a base, an upper cover that can be sealed and matched with the base, and a wiring assembly, wherein the wiring assembly is arranged in the upper cover; the base is provided with a first connection terminal, and the base is provided with a connection with the solar panel. The opening through which the metal sheets connected to the positive and negative electrodes passes, and the wiring assembly includes a second connection terminal, wherein, when the base and the upper cover are closed, the second connection terminal is electrically connected to the first connection terminal. In the solar photovoltaic module junction box provided by the present invention, the important parts in the junction box are mainly arranged in the upper cover, and the upper cover and the junction box base fixed on the solar panel are assembled by inserting, thereby overcoming the Shortcomings of the prior art.

Description

Solar photovoltaic module junction box

【Technical field】

The invention relates to the field of electrical connectors, in particular to a junction box for solar photovoltaic modules.

【Background technique】

Solar energy is a renewable resource. Converting solar energy into electricity can save energy and reduce environmental pollution, so such technology has attracted public attention.

Solar photovoltaic modules are a group of common devices that convert sunlight energy into electrical energy, usually including monocrystalline silicon, polycrystalline silicon and thin-film cells. The solar photovoltaic module junction box is used to realize the interconnection between solar energy and external power supply components, so as to output the power of the solar photovoltaic module to the outside.

When in use, the solar photovoltaic module junction box is usually fixed on the solar panel for energy transmission. Generally, a solar photovoltaic module junction box usually includes a base, a wiring assembly (such as a connection terminal, a diode, etc.) disposed in the base, and an upper cover that seals the base and the wiring assembly. Specifically, in the existing junction boxes for solar photovoltaic modules, most of the junction components are arranged on the base, and the base is usually fixedly installed on the solar panel. That is to say, when the junction box is installed on the solar panel, the base of the junction box is actually fixed on the solar panel, that is, it cannot be easily disassembled from the solar panel.

Based on the above structure, the existing solar photovoltaic module junction box usually has the following problems in use: once any problem occurs in the junction box, the entire solar panel installed with the junction box cannot be used, resulting in the use of The cost is quite high.

【Content of invention】

In view of the technical problems mentioned above in the background art, at least one object of the present invention is to provide a solar photovoltaic module junction box. The important components in the junction box are mainly arranged in the upper cover, and the upper cover and the base of the junction box fixed on the solar panel are assembled by inserting, thereby overcoming the defects of the prior art.

Another object of the present invention is to provide a solar photovoltaic module junction box that can reduce the use cost.

At least one technical solution of the present invention is achieved in this way: the solar photovoltaic module junction box includes a base, an upper cover that can be sealed with the base, and a wiring assembly, wherein the wiring assembly is arranged in the upper cover; the base is provided with a first As for the connection terminal, the base is provided with an opening for passing through the metal sheet connected with the positive and negative electrodes of the solar cell panel, and the wiring assembly includes a second connection terminal, wherein, when the base and the upper cover are closed, the second connection terminal is connected to the first connection terminal. A connecting terminal is electrically connected.

According to the present invention, one of the first connection terminal and the second connection terminal has a female end portion and the other has a male end portion, and when the base and the upper cover are closed, the female end portion and the male end portion are press-fitted.

According to a specific embodiment of the present invention, the male end part is an insertion piece, and the female end part is a socket into which the insertion piece can be inserted.

Wherein, the wiring assembly further includes a diode and a conductor for fixing the diode and forming an electrical connection with the second connection terminal.

Specifically, the conductor includes a pair of opposite elastic pieces. The top of each elastic piece is curled inward toward the other elastic piece to form two opposite curved surfaces. The socket into which the pin is inserted.

Preferably, the conductor is integrally formed with the second connection terminal.

Furthermore, the base and the upper cover are fixedly connected by a locking device, and the locking device includes a padlock arranged on the base, and a lock groove arranged on the upper cover and matched with the padlock.

Further preferably, a sealing groove for accommodating the sealing ring is formed on the periphery of the wiring assembly on the base.

The present invention has at least the following technical effects: the solar photovoltaic module junction box provided by the present invention, in the design, the main wiring components of the junction box (such as connecting terminals, diodes, etc.) It is connected in a combined way, that is, the upper cover and the base can be separated freely. Therefore, when a problem occurs in the junction box of the solar photovoltaic module provided by the present invention, only the upper cover and the junction assembly disposed therein need only be replaced, thereby avoiding the scrapping of the junction box and even the entire solar panel. Correspondingly, the use cost of the junction box of the solar photovoltaic module is reduced. At the same time, compared with the junction box in the prior art, the solar photovoltaic module junction box provided by the present invention has simple connection mode, convenient operation, easy maintenance once a problem occurs, and can be used multiple times, thereby reducing the use of the junction box. cost.

【Description of drawings】

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a kind of structural representation of solar photovoltaic module junction box described in a specific embodiment of the present invention;

Fig. 2 is a kind of structural representation of the base in the solar photovoltaic module junction box described in the above-mentioned specific embodiment of the present invention;

Fig. 3 is a kind of structural representation of the upper cover in the junction box of the solar photovoltaic module described in the above-mentioned specific embodiment of the present invention;

Fig. 4 is a partially enlarged schematic cross-sectional view of the solar photovoltaic module junction box described in the above specific embodiment of the present invention, illustrating the state when the base and the upper cover are sealed.

【Detailed ways】

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like reference numerals designate like or similar elements throughout. The embodiments described below with reference to the figures are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

Please refer to Fig. 1-4, Fig. 1-4 shows the solar photovoltaic module junction box described in a specific embodiment of the present invention. Specifically, Fig. 1 shows a schematic structural view of a solar photovoltaic module junction box in this specific embodiment; Fig. 2 shows a structural schematic diagram of a base in a solar photovoltaic module junction box in the above specific embodiment; Fig. 3 shows the above-mentioned specific implementation A schematic diagram of the structure of the upper cover in the junction box of the solar photovoltaic module in the example; and Fig. 4 is a schematic diagram of a partial enlarged section in the junction box of the solar photovoltaic module in the above-mentioned specific embodiment, showing that when the base and the upper cover are sealed and matched state inside the junction box.

Please refer to Figs. 1-3 first, the present invention provides a solar photovoltaic module junction box. According to the present invention, the solar photovoltaic module junction box mainly includes a base 1, an upper cover 2 and a wiring assembly 3, wherein the upper cover 2 and the base 1 are hermetically fitted to seal the wiring assembly 3 in the two, and the wiring assembly 3 is It is used to realize the connection between the solar photovoltaic module and the external power supply module, so as to transmit the power generated by the solar photovoltaic module to the external power supply module, so as to realize energy transmission. Wherein, the wiring assembly 3 mainly includes some components that play an electrical connection role in the junction box, such as connecting terminals, diodes, and the like. Specifically, in this specific embodiment, the components in the junction box of the solar photovoltaic module that play the role of connecting to the outside world are the metal sheet 20 connected to the positive and negative electrodes of the solar circuit board (not shown) and the external power supply assembly (the Take the external cable 100 as an example) to the external connection device 90 connected. At the same time, for the convenience of description, the wiring assembly 3 in this embodiment is only illustratively including connection terminals 10, 30, conductors 31 and diodes 60. Readers should understand that the wiring assembly in the junction box should also include and parts other than components.

According to the present invention, in the design of the solar photovoltaic module junction box, the junction assembly 3 is mainly arranged in the upper cover 2 of the junction box, wherein the junction assembly 3 includes the second connection terminal 30, the conductor 31 and the diode 60, and the base 1 There is a first connection terminal 10 on the top, and an opening 1a is opened on the base 1, and the opening 1a is suitable for passing through the metal sheet 20 connected with the positive and negative electrodes of the solar cell panel, wherein the metal sheet 20 passing through the opening 1a is connected to the first A connection terminal 10 is connected in contact, wherein, when the base 1 and the upper cover 2 are closed, the second connection terminal 30 is electrically connected to the first connection terminal 10 . In this way, since the base 1 of the junction box of the solar photovoltaic module is fixed to the solar panel for use, and the main components in the junction assembly 3 in the junction box are all arranged in the upper cover 2 detachable from the base 1, even if If there is any problem with the important parts in the junction box (such as the diode 60), the user only needs to remove the upper cover of the junction box from the solar panel to repair or replace the parts, instead of replacing the entire wiring boxes and solar panels, thereby effectively reducing the cost of using junction boxes.

According to the present invention, one of the first connection terminal 10 and the second connection terminal 30 has a female end portion 10a and the other has a male end portion 30a, and when the base 1 and the upper cover 2 are closed, the female end portion 10a and the upper cover 2 are closed. The male end portion 30a is a crimp fit. Specifically, in a specific embodiment of the present invention, as shown in FIGS. 2-4 , the first connection terminal 10 disposed in the base 1 has a female end portion 10a, and the second connection terminal disposed in the upper cover 2 30 has a male end portion 30a. When the base 1 is sealed with the upper cover 2, the female end portion 10a of the first connection terminal 10 and the male end portion 30a of the second connection terminal 30 are press-fitted, thereby realizing the first connection terminal. 10 and the electrical connection between the second connecting terminal 30. Of course, in another specific embodiment, the second connection terminal 30 disposed in the upper cover 2 may have a female end portion 10a, while the first connection terminal 10 disposed in the base 1 may have a male end portion 30a.

Specifically, as shown in FIG. 3, in a specific embodiment of the present invention, as shown in FIG. 3, the male end part 30a is an insertion piece, and as shown in FIG. 2, the female end part 10a is an optional insertion piece. plugged into the socket. In this way, as shown in FIG. 4 , when the base 1 and the upper cover 2 are closed, the male end portion 30 a of the second connection terminal 30 just press-fits with the female end portion 10 a of the first connection terminal 10 to realize electrical connection. Meanwhile, according to a specific embodiment of the present invention, as shown in Fig. 2 and Fig. 4, the thin metal sheet 20 arranged in the opening 1a of the base 1 for connecting with the solar cell panel has a sheet structure 20a at one end, and the sheet The shape structure 20a is crimped on the first connecting terminal 10, so as to realize the electrical connection between the two.

In the solar photovoltaic module junction box provided by the present invention, as shown in FIGS. 3 and 4 , the junction assembly 3 further includes a conductor 31 for fixing the diode 60 and forming an electrical connection with the second connection terminal 30 . Specifically, as shown in FIG. 3 , the conductor 31 includes a pair of opposite elastic pieces 310, wherein the top of each elastic piece 310 is curled inward toward the direction of the other elastic piece 310 to form two opposite curved surfaces 310a, and the curved surfaces 310a respectively touch The two sides of the diode 60 are covered, and the curved surface 310a also forms a slot 310b for inserting the pin of the diode 60 . Certainly, in another specific embodiment, the curved surface 310 a of the elastic piece 310 may also be only provided on both sides of the diode 60 , and not necessarily on both sides of the diode 60 . Preferably, the conductor 31 is integrally formed with the second connection terminal 30 .

In addition, the solar photovoltaic module junction box provided by the present invention further includes a sealing ring 40 . Specifically, as shown in FIG. 3, the sealing ring 40 is sleeved outside the wiring assembly 3 in the upper cover 2. Correspondingly, as shown in FIG. The sealing groove 40a of the ring 40. In this way, when the base 1 and the upper cover 2 are closed to each other, the sealing ring 40 is accommodated in the sealing groove 40a, and the sealing engagement between the base 1 and the upper cover 2 is realized. It is worth mentioning that in another embodiment of the present invention, any other sealing structure that can realize the sealing fit between the upper cover and the base of the junction box can also be used.

At the same time, the solar photovoltaic module junction box provided by the present invention also includes a locking device for fixedly connecting the base 1 and the upper cover 2 . Specifically, as shown in Fig. 2 and Fig. 3, the locking device includes a padlock 50a arranged on the base 1, and a lock groove 50b arranged on the upper cover 2, and the lock groove 50b cooperates with the padlock 50a to realize the connection between the base 1 and the upper cover. Cover 2 joints of both. That is to say, in the solar photovoltaic module junction box provided by the present invention, the base 1 and the upper cover 2 are assembled together in a plug-in manner through the above-mentioned locking device. In this way, the connection method is simple and the operation is convenient. Once a problem occurs, the upper cover 2 can be easily detached from the base 1, which is convenient for maintenance and can be used multiple times, thereby reducing the use cost of the junction box. It is worth mentioning that in another embodiment of the present invention, any other locking structure capable of effectively connecting and easily disassembling the upper cover and the base of the junction box may also be used.

The above-mentioned embodiments of the present invention only illustrate the principle of the present invention and its effects, rather than limit the present invention. Those skilled in the art should understand that without departing from the spirit and scope of the present invention, Any changes and improvements made to the present invention are within the scope of the present invention. The protection scope of the rights of the present invention shall prevail as defined in the scope of patent application of the present application.

Claims (8)

1. A junction box for solar photovoltaic modules, comprising a base (1), an upper cover (2) that can be sealed with the base, and a wiring assembly (3), characterized in that the wiring assembly (3) is arranged on the upper cover (2) )middle; The base (1) is provided with a first connection terminal (10), and the base (1) is provided with an opening (1a) through which the metal sheet (20) connected to the positive and negative electrodes of the solar cell panel passes, and The wiring assembly (3) includes a second connection terminal (30), wherein, when the base (1) and the upper cover (2) are closed, the second connection terminal (30) and the first The connection terminals (10) are electrically connected. 2. The solar photovoltaic module junction box as claimed in claim 1, characterized in that: One of the first connection terminal (10) and the second connection terminal (30) has a female end portion (10a) and the other has a male end portion (30a), when the base (1) When the upper cover (2) is closed, the female end part (10a) and the male end part (30a) are press-fitted. 3. The solar photovoltaic module junction box as claimed in claim 2, characterized in that: The male end part (30a) is a plug piece, and the female end part (10a) is a socket into which the plug piece can be inserted. 4. The solar photovoltaic module junction box as claimed in claim 1, characterized in that: The wiring assembly (3) further includes a diode (60), and a conductor (31) for fixing the diode (60) and forming an electrical connection with the second connection terminal (30). 5. The solar photovoltaic module junction box as claimed in claim 4, characterized in that: The conductor includes a pair of opposite elastic pieces (310), the top of each elastic piece (310) is curled inward toward the direction of the other elastic piece (310) to form two opposite curved surfaces (310a), and the curved surfaces (310a ) can be against both sides of the diode (60), and the curved surface (310a) also forms slots (310b) for inserting pins of the diode (60). 6. The solar photovoltaic module junction box as claimed in claim 4, characterized in that: The conductor (31) is integrally formed with the second connection terminal (30). 7. The solar photovoltaic module junction box as claimed in claim 1, characterized in that: The base (1) is fixedly connected with the upper cover (2) through a locking device, and the locking device includes a padlock (50a) arranged on the base (1), and a padlock (50a) arranged on the upper cover (2) a lock slot (50b) on the top and matched with the padlock (50a). 8. The solar photovoltaic module junction box as claimed in claim 1, characterized in that: A sealing groove (40a) for accommodating a sealing ring (40) is opened on the base (1) at the periphery of the wiring assembly (3).

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