CN210111940U

CN210111940U - Junction box of photovoltaic module and photovoltaic module

Info

Publication number: CN210111940U
Application number: CN201920787016.XU
Authority: CN
Inventors: 赵威; 陈振博; 沈灿军; 朱琛; 吕俊
Original assignee: Taizhou Lerri Solar Technology Co Ltd
Current assignee: Taizhou Longi Solar Technology Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-02-21
Anticipated expiration: 2029-05-29

Abstract

The utility model provides a photovoltaic module's terminal box and photovoltaic module relates to the photovoltaic module field. The junction box comprises a base, an upper cover and a diode, wherein the base and the upper cover form a box body, and the diode is arranged in the box body; two fixed connecting sheets for fixing and electrically connecting pins of the diode are fixed on the base, guide grooves are formed in the fixed connecting sheets, each guide groove comprises a first section for guiding the pins of the diode downwards and a second section for transversely guiding the pins of the diode, and the first sections are communicated with the second sections in a corner shape; the base is provided with a spring sheet which is used for pressing the pin of the diode against the tail end of the second section of the guide groove. The present disclosure only needs to simply reform the existing installation structure of the diode-the guide slot which is communicated in a corner shape is arranged on the fixed connection piece, and the elastic piece is arranged on the base, so that the rapid installation and disassembly of the diode can be realized, the operation time is reduced, and the production efficiency is improved; and soldering tin is omitted, and the production cost of the junction box is reduced.

Description

Junction box of photovoltaic module and photovoltaic module

Technical Field

The disclosure relates to the field of photovoltaic modules, in particular to a junction box of a photovoltaic module and the photovoltaic module.

Background

The existing method for welding the diodes in the photovoltaic module junction box by using tin soldering is needed in the mounting and dismounting processes, and the method has the problem of inconvenience in later maintenance and replacement.

In order to solve the above problems, the following methods are adopted: firstly, packaging pins of the diode in other packaging bodies, and then fixing the packaging bodies; the method realizes the welding-free of the diode in the mounting and dismounting processes; however, this method cannot achieve the purpose of quick disassembly and assembly.

Yet another approach is: fixing the diode by using packaging glue; the method simultaneously achieves the purposes of welding-free and quick installation; however, poor contact is very likely to occur due to the fact that the packaging adhesive is subjected to thermal expansion and cold contraction of the wire pressing plate and the diode; in addition, this method also does not facilitate rapid disassembly of the diode.

Therefore, it is necessary to develop a junction box of a photovoltaic module which does not need welding and can rapidly detach and mount a diode.

Disclosure of Invention

The utility model aims to overcome the not enough of prior art, provide a photovoltaic module's terminal box that can solve the mounting structure of diode complicated in the current terminal box, and can't realize quick installation and dismantle the problem.

This disclosure provides a terminal box of photovoltaic module, its technical scheme is:

the junction box of the photovoltaic module comprises a base, an upper cover and a diode, wherein the base and the upper cover form a box body, and the diode is arranged in the box body; the base is fixedly provided with two fixed connecting sheets which are used for fixing and electrically connecting pins of the diode, the fixed connecting sheets are provided with guide grooves, each guide groove comprises a first section for guiding the pins of the diode downwards and a second section for transversely guiding the pins of the diode, and the first sections and the second sections are communicated in a corner shape; and the base is provided with an elastic sheet which presses the pins of the diode against the tail end of the second section of the guide groove.

According to the junction box of the photovoltaic module, when the diode needs to be fixed, the elastic sheet is pulled backwards, the pins of the diode penetrate through the first section and the second section of the guide groove and are finally placed at the tail end of the second section of the guide groove, then the elastic sheet is loosened, and the elastic sheet rebounds to press the diode; at the same timeMake itThe pin of the diode is electrically connected with the fixed connecting sheet, and the installation of the diode is further realized. When a special condition, such as a hot spot effect, occurs, the diode needs to be replaced due to heating, the elastic sheet is pulled backwards, and the diode can be completely taken out. Therefore, the junction box of the photovoltaic module provided by the disclosure can realize the fixation and the electrical connection of the diode only by simply modifying the mounting structure of the diode in the existing junction box of the photovoltaic module, and simultaneously realize the rapid mounting and dismounting of the diode, thereby reducing the mounting and dismounting time of the diode, improving the production efficiency and simplifying the replacement step of the diode; the junction box does not need welding, so that soldering tin is omitted, and the production cost of the junction box is reduced.

The junction box of the photovoltaic module provided by the disclosure further comprises the following auxiliary technical scheme:

wherein the first section extends vertically and the second section extends horizontally.

Wherein the groove width of the guide groove is 0.1-2mm larger than the diameter of the pin of the diode. The present disclosure sets the groove width of the guide groove to be 0.1-2mm larger than the diameter of the pin of the diode so that the pin of the diode can smoothly pass into or out of the guide groove.

The elastic sheet comprises a pressing section and an elastic sheet base located at the lower end of the pressing section, the elastic sheet base is fixed on the base, and the shape of the pressing section is matched with that of the diode. According to the diode, the shape of the pressing section of the elastic sheet is matched with that of the diode, so that the contact area between the pressing section and the side face of the diode is increased, and the pressing capacity of the elastic sheet on the pin of the diode is further improved; the elastic piece base is arranged at the bottom of the abutting section of the elastic piece and fixed on the base, so that the elastic piece forms a fulcrum at the joint of the elastic piece base and the base, and when the elastic piece is pulled, the elastic piece rotates around the fulcrum to improve the elasticity of the elastic piece.

Wherein, the shape of the pressing section is semicircular. This is disclosed sets up to semicircle form through the shape that will support the pressure section to make the section of supporting of shell fragment can support the pin of diode to press in the second section of guide slot to the at utmost, the half side of the section parcel diode is pressed in the support of semicircle form simultaneously, can restrict the rocking of diode in upper and lower direction, improves the reliability of electricity connection and avoids rocking the damage that causes the diode.

Wherein, the shell fragment still includes the spanner that is located the top of section of suppressing. The spanner is arranged at the top end of the abutting section of the elastic sheet, so that the elastic sheet can be conveniently controlled.

A metal sheet is fixed outwards at the tail end of the second section of the guide groove, and the extending direction of the metal sheet is parallel to the extending direction of the pins of the diode; and the pin of the diode is abutted against the metal sheet. This is disclosed through outwards fixing the sheetmetal at the second section terminal department of guide slot to the electrically conductive area of contact of pin and the fixed connection piece of increase diode prevents to form local heavy current in diode and fixed connection piece contact department, causes high temperature, and then burns out line box or diode.

The second section of the guide groove is formed by cutting the fixed connecting sheet, and the metal sheet is formed by bending the cutting sheet forming the second section outwards by 90 degrees. The metal sheet is made by bending the cutting sheet forming the second section by 90 degrees, so that the processing technology of the metal sheet is simplified, and meanwhile, the waste metal sheet generated in the process of processing the second section of the guide groove is fully utilized.

The length of the metal sheet extending out of the guide groove is larger than the length of the pin of the diode extending out of the guide groove.

The present disclosure also provides a photovoltaic module, which comprises the junction box of the photovoltaic module.

Drawings

Fig. 1 is a front view of a junction box of a photovoltaic module of the present disclosure.

Fig. 2 is a side view of a junction box of a photovoltaic module of the present disclosure without a diode mounted thereto.

Fig. 3 is a side view of a junction box mounted diode of a photovoltaic module of the present disclosure.

Fig. 4 is a top view of a junction box of a photovoltaic module of the present disclosure.

In the figure, 1-base, 2-fixed connecting piece, 3-spring piece, 4-pin of diode, 5-diode, 6-metal piece, 21-guide groove, 211-first section, 212-second section, 31-pressing section of spring piece, 32-spring piece base and 33-spanner.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

As shown in fig. 1-4, the junction box of the photovoltaic module comprises a base 1, an upper cover and a diode 5, wherein the base 1 and the upper cover form a box body, and the diode 5 is installed in the box body; two fixed connecting sheets 2 for fixing and electrically connecting pins 4 of the diode are fixed on the base 1, a guide groove 21 is formed in each fixed connecting sheet 2, each guide groove 21 comprises a first section 211 for guiding the pins 4 of the diode downwards and a second section 212 for transversely guiding the pins 4 of the diode, and the first sections 211 and the second sections 212 are communicated in a corner shape; the base 1 is provided with a spring plate 3 which presses the pin 4 of the diode against the tail end of the second section 212 of the guide groove 21.

Specifically, the two fixing connecting pieces 2 mainly function to contact and electrically connect with the pins 4 of the diode, thereby fixing the diode. Two pins of the diode correspond to the two fixed connection pieces 2 respectively. Preferably, the fixing lug 2 is a copper sheet. Therefore, the conductive performance is good, and the performance of the junction box is improved.

In particular, the diode is a diode known in the art. The structure of the device is that the main body part is cylindrical, and two pins are respectively led out from two bottom surfaces of the cylinder. The extending direction of the two pins is parallel to the axial direction of the cylinder.

In some preferred embodiments, as shown in FIGS. 2-3, the first section 211 extends vertically and the second section 212 extends horizontally. The present disclosure sets the first section 211 of the guide groove 21 to extend vertically, and sets the second section 212 of the guide groove 21 to extend horizontally, so that the groove has a simple structure and is easy to process.

In some more preferred embodiments, the slot width of the guide slot 21 is 0.1-2mm larger than the diameter of the pin 4 of the diode. This is so that the pins 4 of the diode can smoothly pass into or out of the guide grooves, thereby facilitating the mounting and replacement of the diode.

In some preferred embodiments, as shown in fig. 2-3, the elastic sheet 3 includes a pressing section 31 and an elastic sheet base 32 located at the lower end of the pressing section 31, the elastic sheet base 32 is fixed on the base 1, and the shape of the pressing section 31 matches the shape of the diode 5. According to the diode, the shape of the pressing section 31 of the elastic sheet 3 is matched with that of the diode 5, so that the contact area between the pressing section 31 and the side face of the diode is increased, and the pressing capacity of the elastic sheet 3 on the pin 4 of the diode is further improved; the elastic sheet base 32 is arranged at the bottom of the abutting section 31 of the elastic sheet 3, and the elastic sheet base 32 is fixed on the base 1, so that the elastic sheet 3 forms a fulcrum at the joint of the elastic sheet base 32 and the base 1, and when the elastic sheet 3 is pulled, the elastic sheet 3 rotates around the fulcrum to improve the elasticity of the elastic sheet 3, so that the diode is pressed more firmly.

In some preferred embodiments, as shown in fig. 2-3, the pressing section 31 is semicircular in shape. This is disclosed sets up to semicircle form through the shape that will support the section 31 to make the section 31 of supporting of shell fragment can support the pin 4 of diode to press in the second section 212 of guide slot 21 to the at utmost, and half side of the section parcel diode is supported to semicircle form simultaneously can restrict the rocking of diode in upper and lower direction, improves the reliability of electricity connection and avoids rocking the damage that causes the diode.

In some preferred embodiments, as shown in fig. 2-3, the striking plate 3 further comprises a wrench 33 at the top end of the pressing section 31. The spanner 33 is arranged at the top end of the abutting section 31 of the elastic sheet, so that the elastic sheet 3 can be conveniently controlled.

In some embodiments, as shown in fig. 1 to 4, a metal sheet 6 is fixed to the end of the second section 212 of the guide groove 21, and the extending direction of the metal sheet 6 is parallel to the extending direction of the pin 4 of the diode; the pin 4 of the diode abuts on the metal sheet 6. According to the diode, the metal sheet 6 with the extending direction parallel to the extending direction of the pin 4 of the diode is arranged at the tail end of the second section 212 of the guide groove 21, so that the conductive contact area of the pin 4 of the diode and the fixed connecting sheet 2 is increased, and the phenomenon that a local large current is formed at the contact part of the diode 5 and the fixed connecting sheet 2, so that high temperature is caused, and a wire box or the diode is burnt out is prevented.

In some more preferred embodiments, the second section 212 of the channel 21 is formed by cutting the fixing lug 2, and the metal sheet 6 is formed by bending the cut piece forming the second section 212 by 90 ° outwards. The metal sheet 6 is made by bending the cutting sheet forming the second section 212 by 90 degrees outwards, so that the processing technology of the metal sheet 6 is simplified, and meanwhile, the waste metal sheet generated in the process of processing the second section 212 of the guide groove 21 is fully utilized.

In one embodiment, the length of the metal sheet extending out of the guide groove is greater than the length of the pin of the diode extending out of the guide groove. That is to say, the tail ends of the pins of the diode are a certain distance away from the tail end of the metal sheet, so that the metal sheet can effectively protect the pins of the diode, and the problem of poor contact of the pins of the diode caused by accidental collision is avoided; meanwhile, the longer metal sheet is beneficial to dissipating heat generated by the current of the diode, so that the service life of the diode is prolonged.

The process of mounting and replacing the diode will be briefly described below.

When the diode is not installed, the elastic sheet 3 is in a natural state, and at the moment, the elastic sheet 3 is in an inclined state relative to the base 1, as shown by a thick solid line in fig. 2; when a diode needs to be installed, the elastic sheet 3 is pulled backwards to enable the elastic sheet 3 to be in a state shown by a thick dotted line in fig. 2, and at the moment, pins of the diode are inserted into the guide grooves; then the elastic sheet is released, the pin 4 of the diode is pressed to the end of the second section 212 of the guide groove 21 by the elastic sheet under the action of the elastic force of the elastic sheet, and the pin of the diode is clamped, at this time, the elastic sheet 3 is in a vertical state relative to the base 1, as shown by a thick solid line in fig. 3, and at this time, the diode is completely installed. When the diode needs to be replaced, the elastic sheet 3 is pulled backwards, so that the elastic sheet 3 is in a state shown by a thick dotted line in fig. 2, and at the moment, the pin of the diode is taken out of the guide groove.

According to the junction box of the photovoltaic module, when the diode needs to be fixed, the elastic sheet is pulled backwards, the pins of the diode penetrate through the first section and the second section of the guide groove and are finally placed at the tail end of the second section of the guide groove, then the elastic sheet is loosened, and the elastic sheet rebounds to press the diode; and meanwhile, the pins of the diodes are electrically connected with the fixed connecting sheets, so that the diodes are installed. When a special condition, such as a hot spot effect, occurs, the diode needs to be replaced due to heating, the elastic sheet is pulled backwards, and the diode can be completely taken out. Therefore, the junction box of the photovoltaic module provided by the disclosure can realize the fixation and the electrical connection of the diode only by simply modifying the mounting structure of the diode in the existing junction box of the photovoltaic module, and simultaneously realize the rapid mounting and dismounting of the diode, thereby reducing the mounting and dismounting time of the diode, improving the production efficiency and simplifying the replacement step of the diode; the junction box does not need welding, so that soldering tin is omitted, and the production cost of the junction box is reduced.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The junction box of the photovoltaic module is characterized by comprising a base, an upper cover and a diode, wherein the base and the upper cover form a box body; the base is fixedly provided with two fixed connecting sheets which are used for fixing and electrically connecting pins of the diode, the fixed connecting sheets are provided with guide grooves, each guide groove comprises a first section for guiding the pins of the diode downwards and a second section for transversely guiding the pins of the diode, and the first sections and the second sections are communicated in a corner shape; and the base is provided with an elastic sheet which presses the pins of the diode against the tail end of the second section of the guide groove.

2. The junction box of a photovoltaic module of claim 1, wherein the first section extends vertically and the second section extends horizontally.

3. The junction box of a photovoltaic module according to claim 1, wherein the groove width of the guide groove is 0.1-2mm larger than the diameter of the pin of the diode.

4. The junction box of a photovoltaic module according to any one of claims 1 to 3, wherein the spring plate comprises a pressing section and a spring plate base located at a lower end of the pressing section, the spring plate base is fixed on the base, and the shape of the pressing section is matched with that of the diode.

5. The junction box of a photovoltaic module according to claim 4, wherein the pressing section is semicircular in shape.

6. The junction box of a photovoltaic module of claim 4, wherein the spring plate further comprises a wrench located at a top end of the pressing section.

7. The junction box of the photovoltaic module as claimed in claim 1, wherein a metal sheet is fixed outwards at the end of the second section of the guide groove, and the extending direction of the metal sheet is parallel to the extending direction of the pins of the diode; and the pin of the diode is abutted against the metal sheet.

8. The junction box of a photovoltaic module according to claim 7, wherein the second section of the guide groove is formed by cutting the fixing connecting piece, and the metal piece is formed by bending the cut piece forming the second section by 90 ° outward.

9. The junction box of a photovoltaic module of claim 8, wherein the length of the metal sheet extending out of the channel is greater than the length of the pin of the diode extending out of the channel.

10. A photovoltaic module comprising the junction box of the photovoltaic module of any one of claims 1-9.