KR101858080B1

KR101858080B1 - Solar Modul Equipped With Assembly Of Junction Box

Info

Publication number: KR101858080B1
Application number: KR1020150140226A
Authority: KR
Inventors: 고석환; 강기환; 주영철; 정영석; 소정훈; 황혜미; 정태희
Original assignee: 한국에너지기술연구원
Priority date: 2015-10-06
Filing date: 2015-10-06
Publication date: 2018-06-29
Also published as: KR20170041303A; JP6254214B2; CN106560998A; CN106560998B; JP2017073957A

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module including a junction box assembly having a structure capable of assembling a sensor for diagnosing failure of a solar cell. A solar cell module according to the present invention includes: a solar cell panel in which solar cells are arranged in a lattice pattern; A trunk box in which a plurality of wires through which a current generated in the solar cell panel flows are introduced; Two terminals provided inside the junction box for sending a current flowing into the twisted wire box to the inverter; And a diagnosis circuit for diagnosing a failure of the solar cell panel is mounted, two through-holes through which the two terminals are inserted are formed, and an inner circumferential surface of the through-hole is provided with a conductive coating contacting the two terminals. . According to the present invention, the existing junction box can be remodeled or a diagnostic sensor for diagnosing the fault of the solar panel can be easily assembled in the existing junction box without separately preparing the junction box.

Description

A solar module having a junction box assembly (Solar Module Equipped With Assembly In Junction Box)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module, and more particularly, to a solar cell module having a junction box assembly having a structure capable of assembling a sensor for diagnosing a failure of the solar cell.

Solar power generation is attracting attention as a means of realizing de-oiling and energy independence. Photovoltaic power generation is a method of receiving light energy from the sun and converting it directly into electrical energy.

The photovoltaic power generation system arranges solar cell solar panels on the outside of the building, and supplies power to various electric devices through the panel, inverter, and distribution panel. It is the junction box that collects the electricity generated by the solar panel and provides it to the junction box. The junction box is connected in series or in parallel to the solar cell panel, and is usually fixed to the back surface of the solar cell panel while maintaining the watertightness by a sealing material. Generally, a junction box collects electricity generated from a solar panel using a bendable ribbon wire.

FIG. 1 shows the interior of a conventional conventional junction box. As shown in FIG. 1, a plurality of ribbon wire connection terminals 2 for fastening an end of a ribbon wire drawn from a solar cell panel are provided in a main body housing 1 of a junction box. A diode 3 is interposed between neighboring ribbon wire connection terminals 2 to bypass a specific line to which a failed solar cell is connected. The terminals of the cable 4 are electrically connected to the outermost two terminals of the plurality of ribbon wire connection terminals 2. The cable 4 is fastened to the main housing 1 by the body jack assembly 5 to connect the junction boxes located on different solar cell panels to each other.

Meanwhile, the conventional product is installed in a box separately equipped with a voltage measuring sensor for diagnosing whether the solar panel is faulty. In this case, since a separate box for installing the sensor is required, not only the cost is increased but also space utilization is reduced due to the space occupied by the box in which the sensor is built.

As shown in Fig. 2, in the solar power generation system disclosed in Patent Publication No. 10-1024930, a sensor for measuring the individual voltage of each solar cell is separately provided outside the junction box, which has the same problem.

In order to solve such a problem, a sensor for diagnosing failure must be installed inside the junction box, but a sensor having a structure capable of installing a failure diagnosis sensor immediately without retrofitting the existing junction box I can not see it.

Patent Registration No. 10 ?? 1024930 (Registration date: March 18, 2011)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a sensor for diagnosing the failure of a solar panel without replacing the existing junction box separately or constructing a new junction box, So that the solar cell module can be operated normally.

According to an aspect of the present invention, there is provided a solar cell module including: a solar cell panel in which solar cells are arranged in a lattice pattern; A trunk box in which a plurality of wires through which a current generated in the solar cell panel flows are introduced; Two terminals provided inside the junction box for sending a current flowing into the twisted wire box to the inverter; And a diagnosis circuit for diagnosing a failure of the solar cell panel is mounted, two through-holes through which the two terminals are inserted are formed, and an inner circumferential surface of the through-hole is provided with a conductive coating contacting the two terminals. And the like.

Preferably, the through hole is formed to open to one side of the diagnostic sensor substrate. The diagnostic sensor substrate may further include a protruding rod provided on an inner circumferential surface of the through hole and preventing the diagnostic sensor substrate from separating from the terminal and capable of moving forward and backward and spaced apart from a straight line extending in the longitudinal direction of the protruding rod from the end of the diagnostic sensor substrate And a detachable switch which is provided on one side of the detachable bar so that the end of the protruding bar is hinged and the other end of the detachable switch is in contact with the other end of the detachable switch, And a release preventing portion formed of two action springs that are provided on the bar and two return springs which are in contact with both sides of the link bar and spaced apart from each other.

Preferably, the diagnostic sensor substrate is provided so as to be opposed to each other between the inner end and the protruding rod on the inner circumferential surface of the through hole, and a close contact portion made of an elastic conductor is formed. Further, the close contact portions are two plate springs facing each other. The contact contact portion includes two protruding members arranged to face each other, a pressing spring inserted into the diagnostic sensor substrate to press the back surface of the protruding member, a pressing spring formed on the back surface, And an engaging member formed to be larger than a groove for insertion and removal of the projecting member to suppress the projecting of the projecting member.

In addition, the solar cell module according to the present invention includes a junction box into which a plurality of wirings flowing in a current generated in a solar cell panel flows; Two terminal-shaped terminals provided in the junction box for transmitting a current flowing into the junction box to the inverter; A diagnostic sensor board mounted on a diagnostic circuit for diagnosing a failure of the solar cell panel and disposed under the two terminals in parallel with a terminal; And two connection brackets connecting the two terminals and the diagnostic sensor substrate, the two connection brackets being made of a conductor to conduct electricity between the terminals and the diagnostic circuit.

The solar cell module according to the present invention has the following effects. First, the existing junction box can be remodeled or assembled so that the diagnostic sensor for the diagnosis of the solar panel failure can be normally operated in the existing junction box, even if it is not separately manufactured. Secondly, the diagnostic sensor can be installed horizontally or vertically according to need or according to the structure of the junction box installed previously. Third, the diagnostic sensor can be assembled extremely easily. Fourth, the contact of the diagnostic sensor is firmly fixed to the terminal of the junction box.

1 is a perspective view showing a conventional junction box.
2 is a configuration diagram showing the arrangement of a conventional junction box and a diagnostic sensor.
3 is a view showing a junction box according to an embodiment of the present invention.
4A is a view showing a diagnostic sensor according to an embodiment of the present invention.
4B is a view showing a combination of a diagnostic sensor and a terminal according to an embodiment of the present invention.
4C is a partial enlarged view of Fig. 4B. Fig.
4D is a plan view of FIG. 4B.
5 is an exploded perspective view showing an embodiment of the present invention.
6 is a plan view showing a departure prevention portion in an embodiment of the present invention.
7A is a plan view showing the first embodiment of the close contact portion in the present invention.
Fig. 7B is a plan view showing the second embodiment of the close contact portion in the present invention. Fig.
8 is a front view showing the connecting bracket in the embodiment of the present invention.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. There are roughly two embodiments of the present invention. However, the two embodiments are not mutually exclusive, and can be practiced together. Therefore, first and second embodiments of the present invention will be described first. Next, a second embodiment in which the following two embodiments are performed will be described. For the sake of convenience, the present invention is not limited to the above-described embodiments.

3 is a view showing a junction box according to the first embodiment of the present invention. As shown in the figure, the junction box includes a junction box case 10, a terminal 30, and a diagnostic sensor substrate 30. A junction box is installed on the rear surface of a solar cell panel (not shown) in which solar cells are arranged in a lattice pattern. In the junction box case 10, a plurality of wirings through which a current generated in the solar cell flows are introduced. The terminal 20 is rod-shaped, and is provided with two pieces in one junction box, and is for sending a current flowing into the junction box case 10 to an inverter (not shown). A diagnostic circuit for diagnosing the fault of the solar panel is mounted on the diagnostic sensor substrate 30 and two through holes 31 are formed so that the two terminals 20 are inserted. On the inner circumferential surface of the through hole (31), an energizing coating (32) is formed which is in contact with the two terminals (20) and is energized with the diagnostic circuit.

In FIG. 3, both the case where the diagnostic sensor substrate 30 is detached from the junction box case 10 and the case where the diagnostic sensor substrate 30 is coupled to the junction box case 10 are all represented. At this time, preferably, the through hole 31 may be shaped to open to one side of the diagnostic sensor substrate 30 as shown in the upper part of FIG. The diagnostic sensor substrate 30 is easily coupled to the terminal 20 by only inserting the diagnostic sensor substrate 30 from above the junction box case 10 of FIG. However, in this case, since the diagnostic sensor substrate 30 may be separated from the terminal 20 by vibration, means for preventing this may be required.

In this embodiment, as the departure preventing means, the departure preventing portion 33 shown in Figs. 5 and 6 is provided. 6, the release preventing portion 33 includes a protruding rod 332, a detaching switch 331, an interlocking bar 333, a point-of-action member 334, and two return springs 335 and 336 do.

The protruding rods 332 are provided on the inner circumferential surface of the through hole 31 and prevent the detachment of the diagnostic sensor substrate 30 from the terminal 20 and are capable of moving back and forth. The detachable switch 331 is provided at an end of the diagnostic sensor substrate 30 so as to be spaced apart from a straight line of the protruding rods 332 to retract the protruding rods 332. An end of the protrusion rod 332 is hinged to the one surface of the interlocking bar 333 and an end of the attaching / detaching switch 331 is brought into contact with the other surface of the interlocking bar 333 so as to be spaced apart from the protrusion rod 332. The action point member 334 is provided on the interlocking bar 333 between the end of the protrusion rod 332 and the end of the attaching / detaching switch 331. Two return springs 335 and 336 are provided on both sides of the interlocking bar 333 and spaced apart from each other.

Accordingly, when the switch 331 is pressed, the interlocking bar 333 inserts the protruding rod 332 into the diagnostic sensor substrate 30 by the action point member 334 and the protruding rod 332 retreats, The sensor substrate 30 is released. In the state where the terminal 20 and the diagnostic sensor substrate 30 are coupled, the engagement of the terminal 20 and the diagnostic sensor substrate 30 is maintained by the protruding rod 332 as long as the switch 331 is not pressed.

On the other hand, if the terminal 20 fitted in the through hole 31 is not kept in close contact with the inner circumferential surface of the through hole 31, the vibration of the junction box case 10, Operation may be stopped. In order to prevent such a phenomenon, it is preferable that the contact and holding means shown in Figs. 7A and 7B is required. In the present invention, two types of contact contact portions 34 are provided for this purpose, and two types of contact contact portions 34 are shown in FIGS. 7A and 7B, respectively.

7A is provided between the inner end of the inner circumferential surface of the through hole 31 and the protruding rods 332 so as to face each other, and is made of an elastic conductor. The elastic conductor at this time may be the leaf spring 341. Further, a coil spring may be additionally provided between the leaf spring 341 and the inner circumferential surface of the through hole 31 to reinforce the elastic force of the leaf spring 341 though not shown.

The second embodiment of the contact contact portion 34 includes two protruding members 342 arranged to face each other as shown in FIG. 7B, and a pair of protruding members 342 inserted into the diagnostic sensor substrate 30, A pressing spring 342 ?? 2 which presses the pressing member 342 ?? and a pressing spring 342 ?? which is integrally formed with the protruding member 342 and contacts the back surface with a pressing spring 342 ?? And an engaging member 342-1 which is formed to be larger and suppresses the protrusion of the protruding member 342. [

Next, a second embodiment of the solar cell module according to the present invention will be described with reference to FIGS. 4A to 4D. As shown in the figure, the solar cell module includes a junction box case 10, a terminal 20, a diagnostic sensor substrate 30, and a connection bracket 40.

In the junction box case 10, a plurality of wirings through which a current generated in the solar cell flows are introduced. The terminal 20 is provided inside the junction box case 10 in the form of a rod and is used to send the current flowing into the junction box case 10 to the inverter. The diagnostic sensor substrate 30 has a diagnostic circuit for diagnosing the failure of the solar cell panel and is arranged parallel to the terminal 20 below the two terminals 20. The two connection brackets 40 connect the two terminals 20 and the diagnostic sensor substrate 30 and are made of a conductor to energize the terminal 20 and the diagnostic circuit.

More specifically, the connection bracket 40 is composed of two side plates 41, which surround both sides of the terminal 20, and a lower plate 42, which connects the lower portions of the two side plates 41. A curved section 411 formed to correspond to the shape of the terminal 20 is formed at a portion of the side plate 41 which is in contact with the terminal 20 so that the connection between the connection bracket 40 and the terminal 20 can be made more rigid have.

As shown in FIG. 8, elastic contact made of elastic conductors are provided on the facing surfaces of the curved surface section 411, so that the contact between the connection bracket 40 and the terminal 20 can be reliably ensured. The elastic conductor shown in Fig. 8 is shown as being a leaf spring, but may be configured similarly to the close contact portion shown in Fig. 7B.

4A to 4D, the connection bracket 40 may be integrally coupled to the diagnostic sensor substrate 30 or may be detachably assembled. However, in any form, the connection bracket 40 serves as a contact point of the diagnostic sensor substrate 30 in the second embodiment.

The third embodiment of the present invention is a case where both the through hole 31 and the connection bracket 40 are provided as shown in FIG. Therefore, the third embodiment may vertically or horizontally connect the diagnostic sensor substrate 30 to the junction box case 10 depending on the situation. In order to easily apply the connection brackets 40 when the diagnostic sensor substrate 30 is horizontally coupled to the junction box case 10, the connection brackets 40 are provided on both sides of the lower plate 42, 46). Even if the connection bracket 40 is assembled to the terminal 20 and the connection bracket 40 by assembling the connection bracket 40 to the through hole 31 by the engagement plate 46, And is not separated from the connecting bracket 40. 5, the separation preventing portion 33 also serves to prevent the connection bracket 40 from being detached from the through hole 31. In this case, the close contact portion 34 is formed in the through hole 31 So as to ensure reliable contact between the inner circumferential surface of the connecting bracket 40 and the side plate 41 of the connecting bracket 40.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

1: Body housing 2: Connection terminal
3: Diode 4: Cable
5: Body Jack Assembly 10: Junction Box
20: Terminal 30: Diagnostic sensor substrate
31: Through hole 32: Energized film
33: departure prevention portion 34: close contact portion
40: connection bracket 41: side plate
42: Lower plate 44: Elastic contact
46: latch plate 331: switch
332: projecting rod 333: interlocking bar
334: action point member 335: first return spring
336: second return spring 341: leaf spring
342: projecting member 342-1: engaging member
342-2: compression spring 411: curved section

Claims

A solar cell panel in which solar cells are arranged in a lattice pattern;
A junction box into which a plurality of wirings through which a current generated in the solar cell panel flows, flows;
Two terminals provided inside the junction box for sending a current flowing into the junction box to the inverter; And
A diagnostic circuit board mounted on a diagnostic circuit for diagnosing the failure of the solar cell panel, two through holes through which the two terminals are inserted, and an energizing coating contacting the two terminals on an inner circumferential surface of the through hole, Respectively,
The diagnostic sensor substrate
A protruding bar provided on an inner circumferential surface of the through hole and capable of moving forward and backward to prevent the diagnostic sensor substrate from separating from the terminal,
A detachment switch provided at a distal end of the diagnostic sensor substrate so as to be spaced apart from a straight line forming a longitudinal direction of the protruding rod,
An end of the protruding bar is hinged to one side, and an end of the detachable switch is spaced apart from the other side,
A contact point member provided on the interlocking bar between an end of the protruding rod and an end of the attaching / detaching switch,
And a release preventing portion formed of two return springs which are in contact with both sides of the interlocking bar and spaced apart from each other are provided.

The method according to claim 1,
Wherein the through hole is formed to open to one side of the diagnostic sensor substrate.

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The method according to claim 1,
Wherein the diagnostic sensor substrate is provided so as to be opposed to each other between an inner end and a protruding rod on an inner peripheral surface of the through hole, and a contact contact portion made of an elastic conductor is formed.

5. The method of claim 4,
Wherein the close contact portions are two leaf springs which are opposed to each other.

The connector according to claim 4,
Two protruding members arranged to face each other,
A compression spring inserted into the diagnostic sensor substrate to press the back surface of the projecting member,
A locking member formed integrally with the protruding member and contacting with a compression spring on the back surface and being formed larger than a groove for insertion and removal of the protruding member,
Wherein the solar cell module is a solar cell module.

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