Photovoltaic junction box structure capable of detecting electric connection state

Abstract

The utility model discloses a photovoltaic junction box structure capable of detecting an electric connection state. The photovoltaic junction box structure comprises an upper shell, a lower shell and a detection mechanism. A circuit board is installed in the detection mechanism, the circuit board is connected with a positive electrode through a first connecting line and connected with a negative electrode through a second connecting line, the positive electrode is connected with a first conductive spring, the negative electrode is connected with a second conductive spring, the first conductive spring is in contact with a first metal sheet, and the second conductive spring is in contact with a second metal sheet. The first metal sheet and the second metal sheet are in butt joint with conductive parts on the two sides of the wire connector respectively to form a closed loop, and the light-emitting diode in the wire connector is turned on during conduction and used for indicating the connection state. According to the structure, visual detection of the photovoltaic connection state is realized, and fault positioning and maintenance are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic junction box technical field, especially, relate to a kind of photovoltaic junction box structure of electric connection state can be detected. BACKGROUND

[0002] With the growing demand for clean energy around the world, photovoltaic power generation as a renewable, non-polluting energy access method, in the past few decades, has been rapid development. Photovoltaic power station scale is expanding, from distributed small power station to large centralized power station, widely used in urban construction, rural areas and remote mountainous areas, etc.;

[0003] Photovoltaic junction box is one of the key components in photovoltaic system, it connects photovoltaic cell panel and external circuit, plays important role such as transmission current, protection circuit and realization electrical connection, etc.;

[0004] The existing equipment generally needs to be measured by external professional detection instrument when detecting between photovoltaic panel and wire, test process is time-consuming and laborious and needs certain professional degree, often leads to that worker cannot determine whether the connection between photovoltaic panel and wire is normal during early site installation, or cannot determine which part exists problem during later maintenance, and the maintenance difficulty is big, therefore we propose a kind of photovoltaic junction box structure of electric connection state can be detected. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of photovoltaic junction box structure of electric connection state can be detected, by detection mechanism and installation mechanism, the existing equipment is generally needed to be measured by external professional detection instrument when detecting between photovoltaic panel and wire, test process is time-consuming and laborious and needs certain professional degree, often leads to that worker cannot determine whether the connection between photovoltaic panel and wire is normal during early site installation, or cannot determine which part exists problem during later maintenance, and the maintenance difficulty is big problem.

[0006] A kind of photovoltaic junction box structure of electric connection state can be detected, including upper shell and the lower shell of clamping cooperation, lower shell is equipped with the wire slot for limiting wire connector in it, upper shell is equipped with detection mechanism in it, it is characterized in that:

[0007] The detection mechanism includes base installed in the inner side of upper shell, circuit board is installed on the base, circuit board is connected with positive pole by first connecting line and is connected with negative pole by second connecting line;The positive pole is connected with first conductive spring, and the negative pole is connected with second conductive spring;

[0008] The free end of the first conductive spring is in contact with a first metal sheet, and the free end of the second conductive spring is in contact with a second metal sheet, both of which are fixedly arranged on the inner wall of the lower shell and respectively abut with the two side conductive structures of the wire connector in the wire slot;

[0009] The wire connector is inserted into the wire slot, and a light-emitting diode is arranged on the visible surface of the wire connector, which is connected with the internal conductive structure of the wire connector through a pin and forms a closed electric circuit with the first metal sheet and the second metal sheet, and is used for lighting under the normal state of the closed electric circuit connection;

[0010] One end of the wire connector is connected with an external wire, and the other side outer wall is provided with a clamping spring plate, which is used for forming a limiting cooperation with the clamping frame arranged in the lower shell;

[0011] The outer surface of the upper shell is provided with a groove, and a pressing block is slidably arranged in the groove, which is in contact with the clamping spring plate through a guide structure, and is used for releasing the limitation by pressing when the wire connector needs to be disassembled;

[0012] The outer wall of the upper shell is also provided with a digital display screen, which is used for displaying the detected voltage; the outer surface of the upper shell is provided with a plurality of clamping blocks, which are clamped and matched with the fixed frame of the lower shell; a clamping groove is formed in the clamping block, and is inserted and matched with the clamping plate on the fixed frame, so that the two shells are stably locked.

[0013] The upper shell and the lower shell are made of flame-retardant polycarbonate (Polycarbonate) or ABS plastic, and are suitable for outdoor photovoltaic environment.

[0014] The utility model has the following beneficial effects:

[0015] 1、The utility model discloses a circuit board is arranged to realize the electric connection detection function, when the current is transmitted into the circuit board, if the wire circuit is in the closed state, then the current can be transmitted to the anode through the first connecting wire, and is further transmitted to the first conductive spring, then is guided into the first metal sheet by the first conductive spring, passes through the internal conductive structure of the wire connector, and is transmitted to the negative pole through the second metal sheet and the second conductive spring, and is transmitted to the second connecting wire from the negative pole, forms the current closed loop, makes the light-emitting diode in the wire connector be lighted, and whether the connection of the wire is normal can be judged through the bright light, in the contrary, if the wire is in the damaged state, then the light-emitting diode will not light up.

[0016] 2, The utility model discloses a press block is set up and realizes quick dismounting function, when needing to dismount wire joint, only need to press press block, press block is forced after moving down along the guide structure and driving the synchronous movement of the contact of the clamping elastic sheet, when the clamping elastic sheet is below the limiting height of the card frame, and the clamping structure is released, thereby realizing the quick dismounting of wire joint. The structure improves the connecting efficiency between the wire and junction box, speeds up the installation progress of photovoltaic system, helps shortening the overall project construction period, and improves engineering construction efficiency.

[0017] Of course, any product implementing the present utility model does not necessarily need to achieve all the advantages described above simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 It is the whole structure schematic diagram of the present utility model;

[0020] Figure 2 It is Figure 1 The sectional structure schematic diagram;

[0021] Figure 3 It is the detection mechanism structure schematic diagram of the present utility model;

[0022] Figure 4 It is the upper shell structure schematic diagram of the present utility model;

[0023] Figure 5 It is the lower shell structure schematic diagram of the present utility model;

[0024] Figure 6 It is the wire joint structure schematic diagram of the present utility model.

[0025] In the drawings, the component list represented by each sign is as follows:

[0026] 1, upper shell; 102, lower shell; 103, wire slot; 2, detection mechanism; 201, circuit board; 202, base; 203, second conductive spring; 204, first connecting line; 205, second connecting line; 206, first metal sheet; 207, second metal sheet; 209, electric wire; 210, light emitting diode; 211, electric wire joint; 212, positive electrode; 213, negative electrode; 214, first conductive spring; 215, clamping spring; 3, mounting mechanism; 301, clamping block; 302, clamping groove; 303, fixed frame; 304, clamping plate; 305, recess; 306, pressing block; 307, clamping frame; 308, digital display screen. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] Please refer to Figures 1 to 6 The utility model provides a photovoltaic junction box structure of detectable electric connection state, including upper shell 1 with the lower shell 102 of clamping cooperation, two shell bodies can be installed by a plurality of clamping blocks 301 and fixed frame 303, and the clamping block 301 is provided with the clamping groove 302, and the clamping plate 304 in fixed frame 303 is inserted and is matched, is used for realizing quick locking.

[0029] The lower shell 102 is equipped with the wire slot 103 for inserting the electric wire joint 211, and the electric wire joint 211 is limited and positioned. The electric wire joint 211 is in contact with the first metal sheet 206 and the second metal sheet 207 in the lower shell through the conductive part at both ends, and the first metal sheet 206 and the second metal sheet 207 are fixedly arranged on the inner wall of the lower shell 102 by screw or clamping groove (such as Figure 5 The lower shell 102 is equipped with the wire slot 103 for inserting the electric wire joint 211, and the electric wire joint 211 is limited and positioned. The electric wire joint 211 is in contact with the first metal sheet 206 and the second metal sheet 207 in the lower shell through the conductive part at both ends, and the first metal sheet 206 and the second metal sheet 207 are fixedly arranged on the inner wall of the lower shell 102 by screw or clamping groove (such as

[0030] The inside of the upper shell 1 is equipped with the detection mechanism 2, and the detection mechanism includes the base 202, the base 202 is fixedly installed on the inner surface of the upper shell 1, and the base is installed with the circuit board 201. The circuit board 201 is connected with the positive electrode 212 through the first connecting line 204 and connected with the negative electrode 213 through the second connecting line 205; the positive electrode 212 is connected with the first conductive spring 214, and the negative electrode 213 is connected with the second conductive spring 203. The first conductive spring 214 is in contact with the first metal sheet 206, and the second conductive spring 203 is in contact with the second metal sheet 207, and they respectively constitute the conduction path of the positive and negative loops.

[0031] In the structure combination state, the following closed detection electric circuit is formed: the circuit board 201→the first connecting line 204→the positive pole 212→the first conductive spring 214→the first metal sheet 206→the internal conductive structure of the electric wire joint 211→the second metal sheet 207→the second conductive spring 203→the negative pole 213→the second connecting line 205→the circuit board 201, thereby forming a complete current detection loop.

[0032] The visible surface of the electric wire joint 211 is provided with a light emitting diode 210, which is connected with the internal conductive copper sheet of the electric wire joint 211 through a pin and is connected in series with the above-mentioned closed circuit. When the loop is well conducted, the light emitting diode 210 is lighted, which is used for indicating the electric connection state; if the connection is abnormal, the light emitting diode 210 is not lighted.

[0033] In order to realize the quick dismounting and limited keeping of the electric wire joint 211, the side surface of the electric wire joint 211 is provided with a clamping spring 215, which is elastically and limitingly matched with the clamping frame 307 arranged on the inner side of the lower shell 102. The outer surface of the upper shell 1 is provided with a recess 305, and a pressing block 306 is slidably arranged in the recess 305. The pressing block 306 is provided with an inwardly extending guide inclined surface, which can push the clamping spring 215 to produce deformation under the pressing action, so that the clamping spring 215 is separated from the clamping frame 307, thereby releasing the electric wire joint 211 and realizing the dismounting operation.

[0034] In addition, the outer wall of the upper shell 1 is provided with a digital display screen 308, which is electrically connected with the circuit board 201 and is used for displaying the access voltage value in real time, thereby assisting the staff to judge the on-off state or performance condition of the photovoltaic circuit.

[0035] In the embodiment, the upper shell and the lower shell are both injection molded by using flame-retardant polycarbonate or ABS material, thereby ensuring the insulation, high temperature resistance and weather resistance of the product in the outdoor environment.

[0036] In the actual use process, the staff first inserts the electric wire joint 211 into the wire insertion slot 103 arranged in the lower shell 102. With the gradual pushing of the electric wire joint 211, the clamping spring 215 on the outer side of the electric wire joint 211 is in contact with the clamping frame 307. When the joint continues to be inserted to the predetermined position, the clamping spring 215 will automatically pop up and be clamped and matched with the clamping frame 307, thereby realizing the limited fixing of the electric wire joint 211 and preventing the electric wire joint 211 from loosening or falling off.

[0037] When the wire joint 211 needs to be disassembled, the staff only needs to press the pressing block 306 arranged on the outer surface of the upper shell 1. The pressing block 306 moves inward along the direction of the groove 305 after being stressed, and the lower end thereof is provided with a guide structure, which can be in contact with the clamping spring 215 and push it to be deformed. When the height of the clamping spring 215 is lower than the clamping position of the clamping frame 307, the limit is released, and the wire joint 211 can be pulled out.

[0038] Under the light condition, the output voltage of the photovoltaic panel is input to the circuit board 201 through the junction box, and is transmitted to the positive electrode 212 through the first connecting wire 204, and is transmitted to the first metal sheet 206 through the first conductive spring 214, while the negative electrode 213 is connected to the second metal sheet 207 through the second conductive spring 203, to form a closed detection loop. After the conductive end of the wire joint 211 is in conduction with the first metal sheet 206 and the second metal sheet 207, the internal light-emitting diode 210 is lit, prompting that the current wire connection state is normal.

[0039] If the wire is broken or connected poorly, the current cannot form a closed loop, and the light-emitting diode 210 will not be lit, prompting that the line state needs to be checked. At the same time, the digital display screen 308 is connected to the detection loop of the circuit board 201, and can synchronously display the current output voltage value of the photovoltaic panel, to assist in judging the operation state of the photovoltaic assembly.

[0040] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that the persons skilled in the art can well understand and utilize the application. The application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A photovoltaic junction box structure capable of detecting the connection state, comprising an upper shell (1) and a lower shell (102) in clamping cooperation, a wire slot (103) for limiting an electric wire connector (211) is arranged in the lower shell (102), and a detection mechanism (2) is arranged in the upper shell (1), characterized in that: the detection mechanism (2) comprises a base (202) fixedly arranged on the inner side of the upper shell (1), and a circuit board (201) is arranged on the base (202), the circuit board (201) is connected with a positive electrode (212) through a first connecting line (204) and connected with a negative electrode (213) through a second connecting line (205); the positive electrode (212) is connected with a first conductive spring (214), and the negative electrode (213) is connected with a second conductive spring (203); a free end of the first conductive spring (214) is in contact with a first metal sheet (206), and a free end of the second conductive spring (203) is in contact with a second metal sheet (207), the first metal sheet (206) and the second metal sheet (207) are fixedly arranged on the inner wall of the lower shell (102) and respectively abut against the conductive parts on both sides of the electric wire connector (211) in the wire slot (103); the wire slot (103) is inserted with the electric wire connector (211), the electric wire connector (211) is provided with a light emitting diode (210) therein, one end of the electric wire connector (211) is connected with an electric wire (209) for forming a detection closed loop with the circuit board (201), and the light emitting diode (210) is used for displaying the connection effect according to the conduction state; an outer wall of the electric wire connector (211) is provided with a clamping spring (215) for limiting cooperation with a clamping frame (307) arranged in the lower shell (102), the clamping spring (215) forms stable connection with the clamping frame (307) in the inserted state, so as to prevent the electric wire connector (211) from loosening or falling off. The first metal sheet (206) and the second metal sheet (207) are made of elastic copper sheets and are fixedly arranged on the inner side of the lower shell (102) through screws or clamping grooves. The light emitting diode (210) is arranged on the visible surface of the electric wire connector (211) and is electrically connected with an internal conductive structure through a pin, and the conductive structure and the first metal sheet (206) and the second metal sheet (207) arranged in the lower shell (102) form a closed loop. An digital display screen (308) is arranged on the outer wall of the upper shell (1) and is used for displaying the voltage value detected by the circuit board (201); a plurality of clamping blocks (301) are further arranged on the outer surface of the upper shell (1) and are used for clamping installation with the fixed frame (303) on the lower shell (102). A clamping groove (302) is arranged on one side of the clamping block (301), a clamping plate (304) is arranged in the fixed frame (303) on the lower shell (102), the clamping groove (302) and the clamping plate (304) are inserted and cooperated, and stable locking of the upper and lower shells is realized. ​ 2. The photovoltaic junction box structure of claim 1, wherein, ​ 3. A photovoltaic junction box structure capable of detecting the connection state of electricity according to claim 2, characterized in that, ​ 4. The photovoltaic junction box structure capable of detecting the electrical connection state according to claim 1, characterized in that, ​ 5. A photovoltaic junction box structure capable of detecting the connection state of an electric connection according to claim 4, characterized by ​ 6. A photovoltaic junction box structure capable of detecting the connection state of an electric connection according to claim 5, characterized by The outer surface of the upper shell (1) is provided with a recess (305), and a pressing block (306) is slidingly installed in the recess (305), which is used to push the clamping elastic sheet (215) on the wire connector (211) in a pressing manner to release the limiting state when the wire connector (211) needs to be disassembled.

7. A photovoltaic junction box structure capable of detecting the connection state of an electric connection according to claim 6, characterized by The pressing block (306) is provided with a guide inclined surface and is arranged opposite to the clamping elastic sheet (215) on the wire connector (211), so that the clamping elastic sheet (215) is deformed by being pressed during the sliding process, thereby being separated from the limiting cooperation of the clamping frame (307) and the disassembly of the wire connector is realized.

8. The photovoltaic junction box structure of claim 1, wherein: The upper shell (1) and the lower shell (102) are injection molded by using flame-retardant polycarbonate or ABS plastic.

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