CN210490795U

CN210490795U - Junction box for photovoltaic module

Info

Publication number: CN210490795U
Application number: CN201921962145.4U
Authority: CN
Inventors: 陈龙; 彭丽霞; 许涛
Original assignee: CSI Cells Co Ltd; CSI Solar Power Group Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: Canadian Solar Inc; CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-05-08
Anticipated expiration: 2029-11-14

Abstract

The application provides a junction box for a photovoltaic module, which comprises a box body and conductive terminals arranged in the box body, wherein the conductive terminals are provided with bonding pads; the junction box also comprises a pressing piece, the pressing piece comprises a pressing strip and a clamping arm formed on the pressing strip, and the box body is provided with a clamping hole matched with the clamping arm. The conductive terminals and the bus bars in the corresponding photovoltaic modules can be welded mutually, and the pressing part can be matched with the box body to realize clamping and fixing, so that the operation is convenient and fast, and the communication between the conductive terminals and the bus bars is effectively ensured.

Description

Junction box for photovoltaic module

Technical Field

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

Background

The junction box is an important component of the photovoltaic module, is mainly used for electrically connecting the battery string with an external circuit, and also forms abnormal protection for the photovoltaic module through the diode connected with the battery string in parallel. Generally, the conventional junction box has a box body, an output cable, conductive terminals and a diode, which are disposed in the box body, and the conductive terminals are connected to bus bars led out of a battery string.

The conductive terminals of the junction box and the bus bar items are mainly connected in the following two ways, one is a clamping structure, but the existing clamping structure is complex in operation, low in installation efficiency, incapable of meeting the existing automation requirements, and has the problems of clamp spring aging and the like; the other type is a welding structure, the operation is relatively simple, but phenomena such as insufficient soldering and the like can occur, effective detection is difficult, and hidden dangers such as bus bar loosening and junction box damage exist in the subsequent long-term use process. Although a photovoltaic junction box is disclosed in the industry, the connection terminal and the bus bar are electrically connected by a combination of clamping and welding, the specific connection structure of the connection terminal and the bus bar needs to be further adjusted and improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a terminal box for photovoltaic module, the simple operation connects stably, guarantees photovoltaic module's electrical output, reduces unusual risk.

In order to achieve the above object, an embodiment of the present application provides a junction box, including a box body, and a conductive terminal disposed in the box body, wherein the conductive terminal is provided with a pad; the junction box also comprises a pressing piece, the pressing piece comprises a pressing strip and a clamping arm formed on the pressing strip, and the box body is provided with a clamping hole matched with the clamping arm.

As a further improvement of the embodiment of the present application, the box body includes a supporting wall for mounting the conductive terminal, and the conductive terminal includes a fixing portion fixed on the supporting wall and a connecting portion located at a front side of the fixing portion.

As a further improvement of the embodiment of the present application, the conductive terminal is provided with a mounting hole penetrating vertically, and the mounting hole is disposed adjacent to the front end of the connecting portion.

As a further improvement of the embodiment of the present application, the land is disposed at an intermediate position of the connection portion in the first direction.

As a further improvement of the embodiment of the present application, the land is provided lower than other portions of the connection portion in the height direction.

As a further improvement of the embodiment of the application, the conductive terminals are arranged in at least two and are sequentially arranged at intervals along a first direction; the junction box also comprises a diode which is arranged in the box body and is used for connecting the adjacent conductive terminals.

As a further improvement of the embodiment of the present application, the supporting wall includes a main body portion and a bearing portion protruding forward from the main body portion, the bearing portion is located between the connecting portions of the two adjacent conductive terminals, and an edge of the connecting portion abuts against the bearing portion.

As a further improvement of the embodiment of the application, the bearing part comprises a clamping plate and a reinforcing rib, the clamping plate is horizontally arranged, the reinforcing rib is arranged below the clamping plate, and the clamping plate is provided with two clamping holes which are respectively positioned at two sides of the reinforcing rib.

As a further improvement of the embodiment of the application, when the pressing member is clamped on the supporting wall, the pressing strip extends in a strip shape along the first direction and is located above the bonding pad of each conductive terminal.

As a further improvement of the embodiment of the application, the box body is formed with a guide groove matched with the tail end of the pressing strip.

The beneficial effect of this application is: adopt this application terminal box, conductive terminal can weld each other with the busbar among the corresponding photovoltaic module to pass through the press part cooperatees with the box body to hold busbar and conductive terminal both cards fixedly, the simple operation avoids the electric connection anomaly that the welding is bad to lead to, effectively guarantees conducting terminal and the switching on of busbar.

Drawings

FIG. 1 is a schematic structural view of a junction box for a photovoltaic module according to the present application;

fig. 2 is a schematic view showing a state where the pressing member of the junction box of fig. 1 is separated from the box body;

FIG. 3 is a schematic view of the junction box of FIG. 1 at another angle;

FIG. 4 is an enlarged schematic view of the junction box S of FIG. 3;

FIG. 5 is a schematic plan view of the junction box of FIG. 1;

fig. 6 is a schematic view of a portion of the terminal block of fig. 5 divided along the direction a-a.

100-a junction box; 10-a box body; 11-a support wall; 110-a chucking hole; 111-a body portion; 112-a carrier; 113-support ribs; 1121-cardboard; 1122-reinforcing ribs; 20-a conductive terminal; 21-a fixed part; 22-a connecting part; 221-a pad; 222-mounting holes; 30-a pressing member; 31-pressing strips; 32-a catch arm; a 40-diode; 51-a positive cable; 52-negative pole cable.

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, the present application provides a junction box 100 for realizing power output of a photovoltaic module, where the junction box 100 includes a box body 10 and conductive terminals 20 disposed in the box body 10. The box body 10 can be fixed at a predetermined position on the rear surface of the corresponding photovoltaic module, and the bus bar of the photovoltaic module is connected to the conductive terminal 20. The case 10 is formed with an accommodating space opened upward, and the junction box 100 further includes a cover (not shown) covering the accommodating space of the case 10.

As shown in fig. 2 to fig. 6, the box 10 includes a supporting wall 11 for mounting the conductive terminal 20, and the conductive terminal 20 includes a fixing portion 21 fixed on the supporting wall 11 and a connecting portion 22 located at a front side of the fixing portion 21. The connecting portion 22 is provided with a pad 221, and a mounting hole 222 is further formed at a position of the connecting portion 22 adjacent to the front end, and the bus bar can pass through the mounting hole 222 from bottom to top, and then is bent backwards and connected with the pad 221. The pad 221 has a width in the first direction greater than that of the bus bar, and the mounting hole 222 is provided at a front end of the pad 221. Moreover, the pad 221 is disposed at a position lower than the other portions of the connection portion 22 in the height direction, and the pad 221 is recessed downward, so that positioning during the bus bar soldering installation process is facilitated, and solder overflow can be prevented.

The junction box 100 further includes a pressing member 30 for pressing the bus bar against the corresponding conductive terminal 20, the pressing member 30 includes a pressing bar 31 and a holding arm 32 protruding downward from the pressing bar 31, and the supporting wall 11 is formed with a holding hole 110 matching with the holding arm 32. The pressing member 30 is detachably disposed on the box body 10, and when the pressing member 30 is clamped on the supporting wall 11, the pressing strip 31 is disposed in a strip shape along a first direction perpendicular to the conductive terminals 20, that is, the pressing strip 31 extends in a transverse direction. Here, in order to facilitate the alignment, buckling and assembling of the pressing member 30, the box body 10 is further formed with a guide groove 12 adapted to the end of the pressing bar 31. In other embodiments of the present invention, one end of the pressing bar 31 may be hinged to the box 10, and after the bus bar is welded to the conductive terminal 20, the pressing member 30 is operated to rotate, so that the holding arm 32 is engaged with the holding hole 110, thereby holding and fixing the bus bar to the conductive terminal 20.

The conductive terminals 20 are arranged in at least two and sequentially arranged at intervals along the first direction, here, the conductive terminals 20 are arranged in four, and the heights of the four conductive terminals 20 are basically the same, so that the pressing strip 31 can effectively press and fix each conductive terminal 20. The pads 221 on different conductive terminals 20 correspond to each other along the first direction, that is, the pads 221 of the conductive terminals 20 are arranged at the same position along the front-back direction. The position of the pressing strip 31 corresponds to the position of the pad 221, that is, the position where the pressing strip 31 presses against the bus bar, that is, the welding position of the bus bar. Here, the land 221 is located at a middle position of the connecting portion 22 in the first direction, and the land 221 is preferably disposed beyond the compression bead 31 in the front-rear direction.

The support wall 11 includes a main body 111, a bearing part 112 protruding forward from the main body 111, and a support rib 113 protruding downward from the main body 111 adjacent to the bearing part 112. The bearing portion 112 is located between the connecting portions 22 of two adjacent conductive terminals 20, and the edge of the connecting portion 22 is pressed against the bearing portion 112.

Specifically, the bearing part 112 includes a horizontally disposed clamping plate 1121 and a reinforcing rib 1122 disposed below the clamping plate 1121, the reinforcing rib 1122 extends forward and backward, and the rear end of the reinforcing rib 1122 is connected to the support rib 113. The holding arms 32 are arranged in a group of two by two, and each group of holding arms 32 is correspondingly fixed on one of the bearing parts 112; each of the clamping plates 1121 is correspondingly formed with two clamping holes 110, and the two clamping holes 110 are respectively located at two sides of the corresponding reinforcing rib 1122.

In addition, the junction box 100 further includes a diode 40 disposed in the box body 10 and used for connecting the adjacent conductive terminals 20, and the diode 40 is used for performing safety protection on the corresponding photovoltaic module circuit. The number of the diodes 40 is three, and in practical use, the three diodes 40 are respectively connected in parallel on different cell strings in corresponding photovoltaic modules. In addition, the junction box 100 further includes a positive cable 51 and a negative cable 52, and the positive cable 51 and the negative cable 52 are respectively connected to two of the conductive terminals 20.

The foregoing descriptions of the orientations of "horizontal", "front-back", "up-down", etc. are only used to clearly illustrate the structural features of the terminal box 100 in conjunction with the drawings, and do not limit the usage status and position function.

To sum up, the conductive terminal 20 of the junction box 100 of the present application can be welded to the bus bar in the corresponding photovoltaic module, and the pressing member 30 is matched with the supporting wall 11 of the box body 10, so as to fix the bus bar and the conductive terminal 20 by clamping, so that the operation is more convenient, the electrical connection abnormality caused by poor welding is avoided, and the conduction between the conductive terminal 20 and the bus bar is effectively ensured.

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 terminal box for photovoltaic module, includes the box body, sets up conductive terminal in the box body, its characterized in that: the conductive terminal is provided with a bonding pad; the junction box also comprises a pressing piece, the pressing piece comprises a pressing strip and a clamping arm formed on the pressing strip, and the box body is provided with a clamping hole matched with the clamping arm.

2. The junction box of claim 1, wherein: the box body comprises a supporting wall for mounting the conductive terminal, and the conductive terminal comprises a fixing part fixed on the supporting wall and a connecting part located on the front side of the fixing part.

3. The junction box of claim 2, wherein: the conductive terminal is provided with a mounting hole which penetrates through the conductive terminal from top to bottom, and the mounting hole is arranged close to the front end of the connecting part.

4. The junction box of claim 2, wherein: the pad is disposed at an intermediate position of the connection portion in the first direction.

5. The junction box of claim 2, wherein: the pad is disposed lower than other portions of the connection portion in a height direction.

6. The junction box of claim 2, wherein: the conductive terminals are arranged in at least two and are sequentially arranged at intervals along a first direction; the junction box also comprises a diode which is arranged in the box body and is used for connecting the adjacent conductive terminals.

7. The junction box of claim 6, wherein: the supporting wall comprises a main body part and a bearing part which protrudes forwards from the main body part, the bearing part is positioned between the connecting parts of two adjacent conductive terminals, and the edges of the connecting parts are pressed on the bearing part.

8. The junction box of claim 7, wherein: the bearing part comprises a clamping plate and a reinforcing rib, wherein the clamping plate is horizontally arranged, the reinforcing rib is arranged below the clamping plate, and the clamping plate is provided with two clamping holes which are respectively positioned at two sides of the reinforcing rib.

9. The junction box of claim 6, wherein: when the pressing piece is clamped on the supporting wall, the pressing strip extends in a strip shape along the first direction and is positioned above the bonding pad of each conductive terminal.

10. The junction box of claim 1, wherein: the box body is provided with a guide groove matched with the tail end of the pressing strip.