CN113131297B

CN113131297B - Photovoltaic junction box and photovoltaic module

Info

Publication number: CN113131297B
Application number: CN201911385033.1A
Authority: CN
Inventors: 陈龙; 彭丽霞; 许涛
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2022-05-13
Anticipated expiration: 2039-12-28
Also published as: CN113131297A

Abstract

The application provides a photovoltaic junction box and a photovoltaic assembly, the photovoltaic junction box comprises a box body, a conducting strip arranged in the box body, a first connector connected with the conducting strip, and a second connector in rotatable splicing fit with the first connector, wherein the second connector is used for connecting a cable; the second connector is rotated relative to the first connector so that the cable can be connected to the cassette in different directions. By adopting the photovoltaic assembly of the photovoltaic junction box, the connection direction of the cable and the box body can be flexibly adjusted according to the field installation requirement, the internal stress of the cable is reduced, and the connection safety is ensured.

Description

Photovoltaic junction box and photovoltaic module

Technical Field

The application relates to the technical field of solar power generation, in particular to a photovoltaic junction box and a photovoltaic module.

Background

The junction box is an important component of the photovoltaic module and generally comprises a box body, and a conductive terminal and a diode which are arranged in the box body, wherein the conductive terminal is connected with a bus bar led out by a battery string; the diode is connected in parallel with the battery string to form abnormal protection for the photovoltaic assembly.

The junction box is further connected with a cable to achieve electrical connection and power output of the photovoltaic module. The cable is usually installed in a junction box manufacturer, and is fixedly connected to the box body in a predetermined direction and communicated with the corresponding conductive terminals. The length of the cable arranged on the junction box is larger than the actual required length, so that material waste and cost increase are caused; and after the junction box with the cable is installed, the corresponding photovoltaic module is difficult to automatically circulate. Connectors for photovoltaic junction boxes are also disclosed in the industry, but the connectors are fixed in an assembling connection mode, and with the development of photovoltaic module technology, the installation mode of the modules is more flexible, and cables of the junction boxes can extend along the long edges of the modules and also can be perpendicular to the long edges of the corresponding photovoltaic modules or in other angle forms, so that the cables are stressed for a long time and are easy to age.

In view of the above, there is a need to provide a new photovoltaic junction box and a photovoltaic module.

Disclosure of Invention

This application aim at provides a photovoltaic terminal box and photovoltaic module, conveniently adjusts the cable direction, and the safety is connected in the on-the-spot installation of being convenient for, assurance.

In order to achieve the above purpose, the present application provides a photovoltaic junction box, which includes a box body, a conductive sheet disposed in the box body, a first connector connected to the conductive sheet, and a second connector rotatably inserted and matched with the first connector, wherein the second connector is used for connecting a cable; the second connector is rotated relative to the first connector so that the cable can be connected to the cassette in different directions.

As a further improvement of the present application, the first connector includes a first terminal electrically connected to the conductive sheet, and a first housing fixing the first terminal, and the second connector includes a second terminal, and a second housing fixing the second terminal; the second housing forms a cable connection portion, and the cable is insertable into the cable connection portion and is connected to the second terminal.

As a further improvement of the application, the photovoltaic junction box further comprises a cover body matched with the box body, and a connecting hole is formed in the cover body; the second connector and the first connector are in plug-in fit through the connecting holes, and the cable connecting portion is exposed outside the cover body.

As a further improvement of the present application, the photovoltaic junction box further includes an elastic member disposed between the first connector and the second connector, the first housing and the second housing are in a first state of being fixed to each other under the action of the elastic member, and the first terminal and the second terminal are electrically connected; under the action of external force, the first shell and the second shell are switched to a second state, and the first shell and the second shell can rotate relatively.

As a further improvement of the present application, the first housing is formed with a holding wall; the second shell is provided with a clamping hook extending towards the first shell, and in a first state, the clamping hook is clamped on the holding wall, and the first shell and the second shell are fixed; under the action of external force, the clamping hook is separated from the holding wall, and the first shell and the second shell can rotate relatively.

As a further improvement of the present application, the hooks are provided in at least two and are evenly distributed along the circumferential direction.

As a further development of the application, the retaining wall is formed with a retaining surface arranged radially outwardly and obliquely in a direction away from the second housing.

As a further improvement of this application, the elastic component is for following the spring that the second connector and the mutual grafting direction of first connector extend, the spring sets up to at least two and along circumference evenly distributed.

As a further improvement of the present application, the photovoltaic junction box further includes a support member, the support member has a mounting plate for mounting the elastic member, and a positioning column protruding from the mounting plate toward the first housing, and the first housing is formed with a positioning hole matching with the positioning column; the elastic member is disposed between the mounting plate and the first housing.

As a further improvement of the present application, the first terminal and the second terminal are respectively configured as a pin and a sleeve extending along a first direction.

As a further improvement of the present application, the first housing has a side wall formed at an outer periphery of the pin and disposed with a gap from the pin, and the second housing has a support wall disposed around an outer periphery of the sleeve; an accommodating cavity is formed between the side wall and the contact pin, and the part of the supporting wall facing the first shell can be accommodated in the accommodating cavity.

As a further improvement of the present application, the photovoltaic junction box further includes a sealing ring disposed between the side wall and the support wall.

As a further improvement of the application, a groove is formed in the side wall or the support wall in a concave mode, and in the second state, the sealing ring is located in the groove.

As a further improvement of the present application, the second connector further includes a drum spring provided in the sleeve, the drum spring having an abutting portion that contracts radially inward, the abutting portion abutting against the surface of the pin in the first state; the contact pin is also provided with a concave part, and in the second state, the abutting part corresponds to the concave part along the radial direction and the abutting part and the concave part are in clearance fit.

The application also provides a photovoltaic module, including solar cell panel, be used for realizing this solar cell panel power output and as before photovoltaic terminal box, connect cable on the second connector.

The beneficial effect of this application is: by adopting the photovoltaic junction box and the photovoltaic module, the cables connected to the second connector can be connected to the box body along different directions through the relative rotation of the first connector and the second connector, so that different field installation requirements of the photovoltaic module are better met, the stress and abnormal installation risks of the cables are reduced, and the connection safety is ensured.

Drawings

FIG. 1 is a schematic view of the photovoltaic junction box of the present application connected to a cable;

FIG. 2 is a schematic view of the photovoltaic junction box of FIG. 1 with the cover open;

FIG. 3 is a schematic view of the photovoltaic junction box of the present application showing the mating of a first connector with a second connector;

FIG. 4 is an exploded view of the first connector and the second connector of FIG. 3;

FIG. 5 is a schematic plan view of the first connector of FIG. 3 at another angle to the second connector;

fig. 6 is a sectional view of the first connector and the second connector of fig. 5 taken along a-a direction.

100-a photovoltaic junction box; 101-a box body; 102-a cover body; 103-a conductive sheet; 104-connection hole; 10-a first connector; 11-pin; 12-a first housing; 121-sidewalls; 122-a holding wall; 123-a holding surface; 124-positioning holes; 125-grooves; 20-a second connector; 21-a sleeve; 211-a stopper; 22-a second housing; 221-a cable connection; 222-a support wall; 223-hook; 224-mounting grooves; 23-drum spring; 231-a holding portion; 30-an elastic member; 40-a support; 41-mounting plate; 42-a positioning column; 50-sealing ring; 200-a cable; 201-wire core; 202-insulating layer.

Detailed Description

The present application will be described in detail below with reference to embodiments shown in the drawings. The present invention is not limited to the above embodiments, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the present embodiments are included in the scope of the present invention.

Referring to fig. 1 and 2, a photovoltaic junction box 100 provided by the present application includes a box 101, a cover 102 coupled to the box 101, and a conductive sheet 103 disposed in the box 101. The photovoltaic junction box 100 further includes a first connector 10 connected to the conductive sheet 103, and a second connector 20 rotatably inserted into the first connector 10.

The first connector 10 and the second connector 20 can be inserted and matched along a first direction. The second connector 20 is used for connecting a cable 200, the cable 200 is connected to the second connector 20 along a second direction offset from the first direction, and when the second connector 20 rotates relative to the first connector 10, the direction in which the cable 200 is connected to the box body 101 can be changed. Typically, the second direction is perpendicular to the first direction.

As shown in fig. 3 to 6, the first connector 10 includes a first terminal, a first housing 12 for fixing the first terminal; the second connector 20 includes a second terminal, a second housing 22 for holding the second terminal. The photovoltaic junction box 100 further includes an elastic member 30, and the elastic member 30 is elastically deformable in the first direction. The first housing 12 and the second housing 22 are in a first state of being fixed to each other under the action of the elastic element 30, and the first terminal and the second terminal are electrically connected; under the action of external force, the first housing 12 and the second housing 22 are switched to the second state, and the first housing 12 and the second housing 22 can rotate relatively. And, after the external force is removed, the first housing 12 and the second housing 22 are restored to the first state by the elastic member 30. That is, the elastic element 30 is arranged to enable the first housing 12 and the second housing 22 to have two different assembling states, so that the plugging angle of the second connector 20 can be adjusted more conveniently.

Specifically, the first terminal and the second terminal are respectively provided as a pin 11 and a sleeve 21 extending along a first direction. The second connector 20 further includes a drum spring 23 disposed in the sleeve 21, and the drum spring 23 has an abutting portion 231 that is contracted inward in the radial direction and is configured to abut against the surface of the pin 11. The contact pin 11 and the sleeve 21 can be made by winding corresponding metal sheets, one end of the sleeve 21 facing the contact pin 11 is inwardly contracted to form a stopping part 211, and the stopping part 211 is used for preventing the drum spring 23 from being separated outwards; the size of the opening of the stopping portion 211 is also adapted to the pin 11. Of course, the sleeve 21 may further include a limiting structure for limiting the movement of the drum spring 23 in a direction away from the pin 11, so as to better limit the position of the drum spring 23 and ensure its normal abutting engagement with the pin 11.

The pin 11 and the first shell 12 are integrally formed by injection molding; the sleeve 21 is integrally injection molded as with the second housing 22. In this embodiment, an end of the pin 11 facing away from the sleeve 21 protrudes out of the first housing 12 to be electrically connected to the conductive plate 103, and the pin 11 can be soldered to the conductive plate 103, so as to ensure the connection stability between the pin and the conductive plate. The end of the second housing 22 away from the first housing 12 is provided with a cable connecting portion 221, and the end of the sleeve 21 away from the pin 11 extends to the cable connecting portion 221. The cable 200 includes a wire core 201 and an insulating layer 202 covering the wire core 201, the cable 200 is inserted into the cable connecting portion 221, and the wire core 201 is electrically connected to the sleeve 21. Here, the cover 102 has a connection hole 104, the second connector 20 and the first connector 10 are inserted into and mated with each other through the connection hole 104, and the cable connection portion 221 is exposed outside the cover 102.

The first housing 11 is formed with a sidewall 121 located at the periphery of the pin 11 and spaced from the pin 11, the sidewall 121 is substantially cylindrical along the first direction, and one end of the sidewall facing the second housing 22 is turned outwards to form a holding wall 122. The second housing 22 is formed with a support wall 222 disposed along the outer periphery of the sleeve 21, the support wall 222 is disposed adjacent to the sleeve 21, and the sleeve 21 does not extend beyond the support wall 222 in the first direction. A containing cavity is formed between the side wall 121 and the pin 11; while the pin 11 is inserted into the sleeve 21, the portion of the supporting wall 222 facing the first housing 12 is correspondingly received in the receiving cavity.

The second housing 22 is further formed with a hook 223 extending toward the first housing 12. In the first state, the hook 223 is clamped on the retaining wall 122, the elastic member 30 applies an elastic stress to the second housing 12 in a direction away from the first housing 12, and the hook 223 is in contact with the retaining surface 123 of the retaining wall 122 at a side away from the second housing 22, so that the first housing 12 and the second housing 22 are fixed to each other. The holding surface 123 is preferably inclined radially outward and away from the second housing 22 to prevent the hook 223 from being disengaged. Certainly, in order to enhance the fastening effect between the hook 223 and the fixing surface 123, a plurality of spaced-apart slots may be disposed on the fixing surface 123, and when the hook 223 falls into the slot, the position between the first casing 12 and the second casing 22 can be locked more effectively along the circumferential direction.

Here, the number of the hooks 223 is at least two along the circumferential direction, so as to ensure that the hooks 223 can be tightly clamped on the holding wall 122 in the first state, and the first casing 12 and the second casing 22 are locked. When a force toward the first housing 12 is applied to the second housing 22, the elastic member 30 is elastically deformed, and the hook 223 is disengaged from the holding wall 122. At this time, the first and

second housings

12 and 22 can rotate relative to each other.

The elastic member 30 is a spring extending in a first direction. The photovoltaic junction box 100 further includes a supporting member 40 disposed between the first casing 12 and the second casing 22, wherein the supporting member 40 has an annular mounting plate 41 for mounting the elastic member 30, and a positioning post 42 protruding from the mounting plate 41 along a first direction.

The positioning column 42 may be integrally formed on one side of the mounting plate 41, or may be fixed to the mounting plate 41 by post-installation. The springs are arranged in at least two and are uniformly distributed and installed between the mounting plate 41 and the first housing 12 along the circumferential direction, and one side of the holding wall 122 facing the second housing 22 forms an annular abutting surface matched with the springs. Here, the number of the springs is four, the number of the positioning columns 42 is also four, and the springs and the positioning columns 42 are arranged at intervals along the circumferential direction; the holding wall 122 is formed with a positioning hole 124 for matching with the positioning post 42. In other words, when the second housing 22 rotates relative to the first housing 12, the elastic member 30 and the supporting member 40 are both fixed relative to the first housing 12 in the circumferential direction.

In order to improve the waterproof sealing performance between the first connector 10 and the second connector 20, the connecting drill further includes a sealing ring 50 disposed between the side wall 121 and the supporting wall 222, and the sealing ring 50 is made of an elastic material such as rubber, resin, and the like. Specifically, the supporting wall 222 is provided with a mounting groove 224, the side wall 121 is provided with a groove 125, and the sealing ring 50 is fixedly mounted in the mounting groove 224. In the first state, the sealing ring 50 is in contact with the side wall 121 to seal the side wall 121 and the support wall 222; in the second state, the sealing ring 50 moves together with the second housing 22 to a position corresponding to the groove 125, and at this time, the sealing ring 50 does not contact with the sidewall 121, which is more convenient for the rotational adjustment of the second connector 20.

It is considered that the abutting portion 231 of the drum spring 23 always abuts on the pin 11, and abrasion may be caused when the sleeve 21 rotates. In other embodiments of the present invention, the pin 11 may be recessed radially to form a corresponding recess, and in the second state, the abutting portion 231 corresponds to the radial position of the recess, so as to reduce the friction between the drum spring 23 and the pin 11.

The present application further provides a photovoltaic module using the aforementioned photovoltaic junction box 100, the photovoltaic module further includes a solar cell panel (not shown), the box body 101 can be fixed at a predetermined position on the back of the solar cell panel by using silica gel, and the cable 200 is used to realize the electrical connection and power output of the solar cell panel. The first direction is also a direction perpendicular to the solar panel, and the second direction is a direction parallel to the solar panel.

In summary, the photovoltaic junction box 100 and the photovoltaic module of the present application are fixed to each other by the first casing 12 and the second casing 22 under the elastic stress of the elastic member 30; meanwhile, the elastic element 30 deforms under the action of external force, and the hook 223 is separated from the holding wall 122, so that the first casing 12 and the second casing 22 can rotate relatively. Accordingly, the cable 200 connected to the second connector 20 can be angularly adjusted along with the rotation of the second housing 22, so as to reduce the installation stress and the abnormal risk and ensure the connection safety.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the concrete description of the feasible embodiments of the present application, they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present application are intended to be included within the scope of the present application.

Claims

1. The utility model provides a photovoltaic terminal box, includes the box body, sets up the conducting strip in the box body, its characterized in that: the photovoltaic junction box further comprises a first connector connected with the conducting strip and a second connector in rotatable splicing fit with the first connector, and the second connector is used for connecting a cable; the second connector is rotated relative to the first connector so that the cable can be connected to the cassette body in different directions; the first connector and the second connector are in plug fit along a first direction, and the cable is connected to the second connector along a second direction deviated from the first direction; the first connector comprises a first terminal electrically connected with the conducting strip and a first shell for fixing the first terminal, and the second connector comprises a second terminal and a second shell for fixing the second terminal; the second shell is provided with a cable connecting part, and the cable is inserted into the cable connecting part and is connected with the second terminal; the photovoltaic junction box further comprises an elastic piece arranged between the first connector and the second connector, and a holding wall is formed on the first shell; the second shell is provided with a hook extending towards the first shell; the first shell and the second shell are in a first state of mutual fixation under the action of the elastic piece, the first terminal and the second terminal are electrically connected, and the clamping hook is clamped on the holding wall; under the action of external force, the first shell and the second shell are switched to a second state, the clamping hook is separated from the fixing wall, and the first shell and the second shell can rotate relatively.

2. The photovoltaic junction box of claim 1, wherein: the photovoltaic junction box also comprises a cover body matched with the box body, and a connecting hole is formed in the cover body; the second connector and the first connector are in plug-in fit through the connecting holes, and the cable connecting portion is exposed outside the cover body.

3. The photovoltaic junction box of claim 1, wherein: the pothooks are arranged into at least two and are evenly distributed along the circumferential direction.

4. The photovoltaic junction box of claim 1, wherein: the holding wall is formed with a holding surface facing radially outward and arranged obliquely in a direction away from the second housing.

5. The photovoltaic junction box of claim 1, wherein: the elastic piece is the edge the spring that second connector and first connector grafting direction extend each other, the spring sets up to at least two and along circumference evenly distributed.

6. The photovoltaic junction box of claim 1, wherein: the photovoltaic junction box also comprises a supporting piece, wherein the supporting piece is provided with a mounting plate for mounting the elastic piece and a positioning column protruding from the mounting plate to the first shell, and a positioning hole matched with the positioning column is formed in the first shell; the elastic member is disposed between the mounting plate and the first housing.

7. The photovoltaic junction box of claim 1, wherein: the first terminal and the second terminal are respectively provided as a pin and a sleeve extending along a first direction.

8. The photovoltaic junction box of claim 7, wherein: the first shell is provided with a side wall which is formed at the periphery of the contact pin and is arranged at a clearance with the contact pin, and the second shell is provided with a supporting wall which is arranged around the periphery of the sleeve; an accommodating cavity is formed between the side wall and the contact pin, and the part of the supporting wall facing the first shell can be accommodated in the accommodating cavity.

9. The photovoltaic junction box of claim 8, wherein: the photovoltaic junction box further comprises a sealing ring arranged between the side wall and the supporting wall.

10. The photovoltaic junction box of claim 9, wherein: the side wall or the supporting wall is sunken to form a groove, and the sealing ring is positioned in the groove in the second state.

11. The photovoltaic junction box of claim 7, wherein: the second connector further comprises a drum spring arranged in the sleeve, the drum spring is provided with a propping part which contracts inwards along the radial direction, and the propping part is propped against the surface of the contact pin in a first state; the contact pin is also provided with a concave part, and in the second state, the abutting part corresponds to the concave part along the radial direction and the abutting part and the concave part are in clearance fit.

12. A photovoltaic module, characterized by: comprising a solar panel, a photovoltaic junction box according to any one of claims 1 to 11 for achieving a power output of the solar panel, a cable connected to the second connector.