Communication box and monitoring system

Abstract

The application relates to the photovoltaic power generation technical field and discloses a communication box and a monitoring system, the communication box comprising a box body, a box cover, a communication control module, a cover and a PID adjusting circuit board. The box body comprises a back plate; the box cover is rotatably arranged on the box body and forms an installation space together with the box body, the box cover is arranged opposite to the back plate; the communication control module is fixedly arranged on the surface of the back plate facing the installation space; the cover is fixedly arranged on the surface of the box cover facing the installation space and forms a containing cavity together with the box cover; the PID adjusting circuit board is fixedly arranged on the surface of the box cover facing the installation space and is located in the containing cavity; along the direction in which the box cover points to the back plate, the box cover, the PID adjusting circuit board, the cover and the back plate are sequentially and spacedly arranged. In the above mode, the overall size of the communication box can be reduced, and the application range of the communication box is widened.

Description

Technical Field

[0001] This application relates to the field of photovoltaic power generation technology, and in particular to a communication box and monitoring system. Background Technology

[0002] Photovoltaic panels exhibit a PID (Potentia-Induced Degradation) effect. If photovoltaic modules are subjected to this effect for an extended period, it will cause a decrease in the PV open-circuit voltage, a reduction in the maximum output current, and a drop in output power. To suppress the PID effect, a PID control module can be installed within the communication box. This module injects voltage between the phase and ground lines of the isolation transformer to adjust the photovoltaic module's voltage to ground, thereby reducing the potential difference, leakage current, and ion migration, and minimizing material damage caused by the electric field. In related technologies, the PID control module is typically enclosed in a housing to provide physical protection, electromagnetic shielding, and enhanced protection. However, the overall size of the communication box is limited by the size of the PID control module's housing, thus restricting the communication box's applicability. Utility Model Content

[0003] The purpose of this application is to provide a communication box and monitoring system, which aims to reduce the overall size of the communication box and broaden its application scope.

[0004] According to a first aspect of this application, a communication box is provided for use in a monitoring system, comprising: The enclosure, including the back panel; A lid is rotatably mounted on the box body and surrounds the box body to form an installation space; the lid is positioned opposite to the back panel. The communication control module is mounted and fixed on the surface of the back plate facing the mounting space; A cover is installed and fixed to the surface of the box cover facing the installation space, and together with the box cover, forms a receiving cavity; A PID control circuit board is mounted and fixed on the surface of the box cover facing the installation space and located within the accommodating cavity; Along the direction from the box cover to the back plate, the box cover, the PID adjustment circuit board, the cover and the back plate are arranged in sequence at intervals.

[0005] Optionally, the number of PID control circuit boards is at least two, and the at least two PID control circuit boards are located in the accommodating cavity and arranged side by side.

[0006] Optionally, one side of the lid is connected to the box body via a pivot, and the other sides are locked and fixed to the box body. The cover has a wiring hole on its side wall near the rotating shaft, and the wiring hole connects the accommodating cavity and the mounting space.

[0007] Optionally, the communication box includes a first reinforcing rib; the first reinforcing rib is mounted and fixed on the surface of the box cover facing the installation space and arranged side by side with the PID adjustment circuit board, a portion of the first reinforcing rib is located in the accommodating cavity, and another portion of the first reinforcing rib extends into the installation space through the wiring hole.

[0008] Optionally, the first reinforcing rib is provided with a plurality of cable management grooves, all of which are located at one end of the first reinforcing rib near the cable routing hole, and the plurality of cable management grooves are spaced apart along the extending direction of the first reinforcing rib.

[0009] Optionally, an insulating and thermally conductive layer is filled between the PID control circuit board and the surface of the housing cover facing the installation space.

[0010] Optionally, the communication box includes a plurality of second reinforcing ribs; the plurality of second reinforcing ribs are all installed and fixed on the surface of the box cover facing the installation space, and the plurality of second reinforcing ribs together form a structural reinforcement area to confine the cover and the PID adjustment circuit board within the structural reinforcement area.

[0011] Optionally, the communication box includes a limiting component; the limiting component includes a first rotating shaft support, a second rotating shaft support, and a limiting rod; one of the first rotating shaft support and the second rotating shaft support is installed and fixed to the surface of the box cover facing the installation space, and the other is installed and fixed to the edge of the box body; the limiting rod is rotatably connected to the first rotating shaft support and the second rotating shaft support respectively to limit the rotation angle of the box cover.

[0012] Optionally, the PID adjustment circuit board is equipped with an indicator light; a light guide column is fixedly installed on the PID adjustment circuit board, with one end of the light guide column located at the indicator light and the other end passing through the cover and exposed outside the cover.

[0013] According to a second aspect of this application, a monitoring system is provided, including the communication box as described above.

[0014] The beneficial effects of the embodiments of this application are as follows: The communication box involved in this application arranges the PID adjustment circuit board on the box cover and adds a cover for protection. That is, the box cover and the cover form the original shell of the PID control module, thereby eliminating the shell of the PID control module. In addition, the PID adjustment circuit board occupies the space in the thickness direction of the box, so that the PID adjustment circuit board does not interfere with other electronic devices such as the communication control module inside the communication box. Therefore, the overall size of the communication box is no longer limited to the size of the shell of the PID control module, the overall size of the communication box is reduced, and the application range of the communication box is broadened. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram illustrating an application scenario of a monitoring system provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a communication box provided in one embodiment of this application; Figure 3 for Figure 2 An exploded view of part of the communication box structure is shown. Figure 4 for Figure 3 An exploded view of part of the communication box from another perspective; Figure 5 for Figure 2 The diagram shows a magnified view of a portion of the communication box's structure.

[0017] Explanation of reference numerals in the attached figures: 1. Monitoring system; 10. Communication box; 10a. Installation space; 10b. Opening; 11. Box body; 111. Back panel; 112. Side panel; 113. Outer flange; 12. Box cover; 121. Baffle; 13. Communication control module; 14. Cover; 141. Wiring hole; 15. PID adjustment circuit board; 16. Limiting assembly; 161. First rotating shaft support; 162. Second rotating shaft support; 163. Limiting rod; 17. First reinforcing rib; 18. Second reinforcing rib; 20. Monitoring platform. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0020] In the description of this application, it should be noted that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0021] In the description of this application, it should be noted that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0022] The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0023] Please see Figure 1 This application provides a schematic diagram of an application scenario for a monitoring system 1, which can be installed in a photovoltaic power station system. It can monitor the operation of the entire power station equipment, such as monitoring the operation data of various key core equipment in the power station, and can also remotely schedule the power generation of the power station, making it convenient for the local power supply bureau to manage and control the power grid system.

[0024] Continue as Figure 1As shown, the monitoring system 1 is applied to a photovoltaic subarray system and includes a monitoring platform 20 and a communication box 10. The communication box 10 collects data from the photovoltaic subarray system and transmits the collected data to the monitoring platform 20, enabling the monitoring platform 20 to monitor the photovoltaic subarray system based on the data. Simultaneously, the communication box 10 can also receive control commands from other control devices and forward them to the photovoltaic subarray system for remote control.

[0025] In related technologies, PID control modules are usually equipped with a housing to provide physical protection, electromagnetic shielding and enhanced protection functions. However, the overall size of the communication box 10 is limited by the size of the PID control module housing, thus limiting the applicability of the communication box 10.

[0026] Please see Figures 2 to 5 One embodiment of this application provides a communication box 10 including a box body 11, a box cover 12, a communication control module 13, a cover 14, and a PID adjustment circuit board 15.

[0027] The lid 12 is rotatably mounted on the box body 11 and surrounds the box body 11 to form an installation space 10a. The box body 11 includes a back plate 111, which is disposed opposite to the lid 12.

[0028] The communication control module 13 is mounted and fixed on the surface of the backplate 111 facing the installation space 10a. The communication control module 13 is used to connect with the monitoring platform 20. The communication control module 13 receives data signals from the inverter and transmits the received data signals to the monitoring platform 20, so that the monitoring platform 20 can monitor the photovoltaic subarray system based on the summarized signals.

[0029] The cover 14 is mounted and fixed to the surface of the cover 12 facing the installation space 10a, and together with the cover 12, forms a receiving cavity. The function of the cover 14 here is to prevent the live PID control circuit board 15 from coming into direct contact with the human body and causing injury.

[0030] The PID control circuit board 15 is mounted and fixed on the surface of the cover 12 facing the installation space 10a and located within the accommodating cavity. The PID control circuit board 15 is used to connect in parallel with the inverter of the photovoltaic subarray system and uses the grid virtual neutral point injection (i.e., N / PE) method to control the voltage to ground of the photovoltaic panel and prevent the PID effect of the photovoltaic panel from decaying.

[0031] Along the direction from the cover 12 to the back plate 111, the cover 12, the PID control circuit board 15, the cover 14 and the back plate 111 are arranged in sequence at intervals.

[0032] If it is necessary to control the inverter of the photovoltaic subarray system, the monitoring platform 20 or other control devices can issue control commands to the communication control module 13, which will then send the control commands to the inverter to control it.

[0033] In summary, the communication box 10 involved in this application places the PID adjustment circuit board 15 on the box cover 12 and adds a cover 14 for protection. That is, the box cover 12 and the cover 14 form the original shell of the PID control module, thereby eliminating the need for a separate shell for the PID control module. In addition, the PID adjustment circuit board 15 occupies the space in the thickness direction of the box body 11, so that the PID adjustment circuit board 15 does not interfere with other electronic devices such as the communication control module 13 inside the communication box 10. Therefore, the overall size of the communication box 10 is no longer limited to the size of the PID control module shell, and the overall size of the communication box 10 is reduced, thus broadening the scope of application of the communication box 10.

[0034] To facilitate staff understanding of the operating status of the PID control circuit board 15, in some embodiments, the PID control circuit board 15 is equipped with an indicator light. A light guide is fixedly installed on the PID control circuit board 15, with one end of the light guide having an indicator light, and the other end passing through the cover 14 and protruding outside the cover 14, so that the light emitted by the indicator light can be transmitted to the cover 14 through the light guide to display the operating status of the PID control circuit board 15.

[0035] For example, the PID control circuit board 15 has four indicator lights: a running indicator light, a device fault indicator light, a communication fault indicator light, and a power indicator light. The running indicator light indicates that the PID control circuit board 15 is continuously in normal operation (including standby). The device fault indicator light indicates a current device fault (flashing for power grid parameter-related faults, with a 1-second cycle). The communication fault indicator light indicates a current communication fault. The power indicator light indicates that the PID control circuit board 15 is currently powered normally (flashing for undervoltage, with a 1-second cycle; the light turns off if there is no power). Furthermore, silkscreen markings are added next to each indicator light for labeling.

[0036] The specific structure of the communication box 10 mentioned in this application will be described below: For housing 11, please refer to Figure 2 and Figure 3In some embodiments, the housing 11 is generally rectangular, and in addition to a back panel 111, it also includes multiple side panels 112. The multiple side panels 112 are integrally formed around the periphery of the back panel 111 and connected end-to-end, forming an open rectangular cavity with the back panel 111. The back panel 111 is used to fix the communication control module 13 and other electronic devices besides the communication control module 13. The multiple side panels 112 cooperate with the lid 12, so that the lid 12 covers and closes the opening 10b of the rectangular cavity. Of course, the shape of the housing 11 is not limited to this; it can be adapted to actual usage requirements, which will not be described in detail here.

[0037] Furthermore, a portion of the periphery of the opening 10b first protrudes towards the center of the rectangular cavity and then in a direction away from the rectangular cavity to form an outer flange 113. The end face of the outer flange 113 is fitted with a sealing strip. When the cover 12 is closed on the box body 11, the cover 12 and the box body 11 enclose an installation space 10a. The outer flange 113 abuts against the cover 12 through the sealing strip to seal the rectangular cavity, reducing the interference of external moisture and dust on the electronic components inside the communication box 10.

[0038] For lid 12, please continue to see Figure 2 and Figure 3 In some embodiments, the outer contour shape of the cover 12 matches the outer contour shape of the back plate 111. Each side edge of the cover 12 bends and extends into the installation space 10a to form a baffle 121. When the cover 12 is closed with the box body 11, the presence of each baffle 121 can reduce the occurrence of external debris blocking the gap between the cover 12 and the sealing strip.

[0039] Furthermore, the bending length of the baffle 121 is approximately the same as the bending length of the outer flange 113, so that the baffle 121 can abut against the outer flange 113, thereby further reducing the possibility of external debris clogging the gap between the cover 12 and the sealing strip.

[0040] like Figure 2 As shown, in some embodiments, one side of the lid 12 is connected to the box body 11 via a pivot, and the other sides are locked and fixed to the box body 11. For example, the left side of the lid 12 is fixedly connected to the left side plate 112 of the box body 11 via a hinge, and the top, bottom, and right sides of the lid 12 are locked to the top side plate 112, bottom side plate 112, and right side plate 112 of the box body 11 via locking buckles.

[0041] like Figure 4As shown, to ensure that staff can easily access the electronic components inside the enclosure 11 without fully opening the enclosure cover 12 during maintenance or inspection, the communication enclosure 10 further includes a limiting assembly 16. The limiting assembly 16 includes a first pivot support 161, a second pivot support 162, and a limiting rod 163. One of the first pivot support 161 and the second pivot support 162 is fixedly mounted on the surface of the enclosure cover 12 facing the installation space 10a, and the other is fixedly mounted on the outer flange portion 113 (the edge of the enclosure 11). The limiting rod 163 is rotatably connected to both the first pivot support 161 and the second pivot support 162 to limit the rotation angle of the enclosure cover 12.

[0042] Continue as Figure 3 and Figure 4 As shown, in some embodiments, the PID control circuit board 15 and the cover 14 are both arranged in the middle area of ​​the cover 12. For example, there are two PID control circuit boards 15 and one cover 14. The two PID control circuit boards 15 are arranged side by side in the middle area of ​​the cover 12 and are covered by the same cover 14. When the cover 12 is closed on the housing 11, each PID control circuit board 15 and the cover 14 enter the installation space 10a from the opening 10b.

[0043] In specific implementation, both the cover 12 and the cover 14 are made of 2mm thick aluminum. A press-fit nut post is riveted to the middle area of ​​the cover 12 at the mounting hole position corresponding to the PID control circuit board 15. Multiple threaded fasteners pass through the mounting holes of the PID control circuit board 15 and are screwed to the press-fit nut posts, ensuring that the PID control circuit boards 15 are arranged side-by-side while meeting the safety distance requirements between each PID control circuit board 15 and the cover 12. The cover 14 has only a simple bend forming an edge, with each edge having a slotted hole. Each edge fits against the surface of the cover 12 facing the installation space 10a. Bolts pass through the slotted holes and the cover 12 and are tightened to nuts. Of course, the cover 14 is not limited to this; the material of the cover 14 can be replaced with a 1.2mm thick hot-dip galvanized sheet, and the painting of the cover 14 can be omitted. Alternatively, the edges of the cover 14 can be bent and welded to enhance its structural strength.

[0044] Furthermore, an insulating and thermally conductive layer is filled between the PID control circuit board 15 and the surface of the cover 12 facing the mounting space 10a, so as to dissipate the heat generated by the PID control circuit board 15 during operation to the outside through the cover 12. For example, an insulating and thermally conductive layer is filled between each PID control circuit board 15 and the surface of the cover 12 facing the mounting space 10a. Such insulating and thermally conductive layers include, but are not limited to, ceramic materials such as aluminum nitride, silicon nitride, and aluminum oxide; graphite and graphene materials; silicone and polyurethane polymer materials; composite materials such as silicon carbide and carbon fiber composites; thermally conductive adhesives; and thermally conductive pads.

[0045] Of course, the number of PID control circuit boards 15 is not limited to such Figure 3 and Figure 4 The two shown can be one or more. Three or more PID control circuit boards 15 are also arranged side by side in the middle area of ​​the box cover 12 and covered by the same cover 14.

[0046] For cover 14, such as Figure 5 As shown, in some embodiments, a wiring hole 141 is provided on the side wall of the cover 14 near the rotating shaft. The wiring hole 141 connects to the accommodating cavity and the mounting space 10a. For example, the wiring hole 141 is located at the bottom end of the side wall of the cover 14 near the rotating shaft. This arrangement allows the wiring to be arranged below the PID control circuit board 15, reducing interference between the wiring and the PID control circuit board 15 and ensuring stable operation of the circuit board. To reduce material waste in the cover 14 and optimize the visual effect, the size of the wiring hole 141 can be modified according to the sum of the diameters of the connecting wires between the PID control circuit board 15 and the inverter of the photovoltaic subarray system.

[0047] Furthermore, continuing as Figure 4 and Figure 5As shown, the communication box 10 includes a first reinforcing rib 17. The first reinforcing rib 17 is mounted and fixed to the surface of the box cover 12 facing the installation space 10a and arranged side by side with the PID control circuit board 15. Part of the first reinforcing rib 17 is located within the accommodating cavity, and another part of the first reinforcing rib 17 extends into the installation space 10a through the wiring hole 141. Exemplarily, the first reinforcing rib 17 is fixed to the box cover 12 by, but not limited to, welding. The first reinforcing rib 17 has multiple cable management channels, all located at the end of the first reinforcing rib 17 near the wiring hole 141, and the multiple cable management channels are spaced apart along the extending direction of the first reinforcing rib 17. The multiple cable management channels are used for the connection wires between the PID control circuit board 15 and the inverter of the photovoltaic subarray system to pass through. The advantage of this arrangement is that while strengthening the structural strength of the box cover 12, the connection wires between the PID control circuit board 15 and the inverter of the photovoltaic subarray system are constrained by the first reinforcing rib 17, facilitating the management, maintenance, and replacement of the lines by the operator.

[0048] Considering the added weight of the PID control circuit board 15 on the cover 12, the cover 12 can be structurally reinforced around the arrangement of the PID control circuit board 15. In some embodiments, the communication box 10 includes a plurality of second reinforcing ribs 18. The plurality of second reinforcing ribs 18 are all mounted and fixed to the surface of the cover 12 facing the mounting space 10a, and the plurality of second reinforcing ribs 18 together enclose a structurally reinforced area to confine both the cover 14 and the PID control circuit board 15 within the structurally reinforced area. For example, as... Figure 4 As shown, there are three second reinforcing ribs 18, which are respectively fixed to the top, left and right sides of the cover 14 by welding, but not limited to welding.

[0049] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A communication box, used in a monitoring system, characterized in that, include: The enclosure, including the back panel; A lid is rotatably mounted on the box body and surrounds the box body to form an installation space; the lid is positioned opposite to the back panel. The communication control module is mounted and fixed on the surface of the back plate facing the mounting space; A cover is installed and fixed to the surface of the box cover facing the installation space, and together with the box cover, forms a receiving cavity; A PID control circuit board is mounted and fixed on the surface of the box cover facing the installation space and located within the accommodating cavity; Along the direction from the box cover to the back plate, the box cover, the PID adjustment circuit board, the cover and the back plate are arranged in sequence at intervals.

2. The communication box according to claim 1, characterized in that, The number of PID control circuit boards is at least two, and the at least two PID control circuit boards are located in the accommodating cavity and arranged side by side.

3. The communication box according to claim 1 or 2, characterized in that, One side of the box lid is connected to the box body via a pivot, and the other sides are locked and fixed to the box body; The cover has a wiring hole on its side wall near the rotating shaft, and the wiring hole connects the accommodating cavity and the mounting space.

4. The communication box according to claim 3, characterized in that, The communication box includes a first reinforcing rib; the first reinforcing rib is installed and fixed on the surface of the box cover facing the installation space and is arranged side by side with the PID adjustment circuit board, part of the first reinforcing rib is in the accommodating cavity, and another part of the first reinforcing rib extends into the installation space through the wiring hole.

5. The communication box according to claim 4, characterized in that, The first reinforcing rib is provided with a plurality of cable management grooves, all of which are located at the end of the first reinforcing rib near the cable routing hole, and the plurality of cable management grooves are spaced apart along the extension direction of the first reinforcing rib.

6. The communication box according to claim 1 or 2, characterized in that, An insulating and thermally conductive layer is filled between the PID control circuit board and the surface of the cover facing the installation space.

7. The communication box according to claim 1 or 2, characterized in that, The communication box includes a plurality of second reinforcing ribs; the plurality of second reinforcing ribs are all installed and fixed on the surface of the box cover facing the installation space, and the plurality of second reinforcing ribs together form a structural reinforcement area to confine the cover and the PID adjustment circuit board within the structural reinforcement area.

8. The communication box according to claim 1 or 2, characterized in that, The communication box includes a limiting component; the limiting component includes a first rotating shaft support, a second rotating shaft support, and a limiting rod; one of the first rotating shaft support and the second rotating shaft support is installed and fixed to the surface of the box cover facing the installation space, and the other is installed and fixed to the edge of the box body; the limiting rod is rotatably connected to the first rotating shaft support and the second rotating shaft support respectively to limit the rotation angle of the box cover.

9. The communication box according to claim 1 or 2, characterized in that, The PID adjustment circuit board is equipped with an indicator light; a light guide column is fixedly installed on the PID adjustment circuit board, with one end of the light guide column located at the indicator light and the other end passing through the cover and exposed outside the cover.

10. A monitoring system, characterized in that, Includes the communication box as described in any one of claims 1-9.

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